Tag Wise Current Affairs
Tag: Nanotechnology
Scientists develop microbial fuel cell to treat textile wastewater
Tags: Biotechnology, Nanotechnology
Published on: 03 February 2019
IIT Madras converts petroleum waste toluene into useful product
Tags: Nanotechnology
Published on: 30 March 2019
IIT Madras to set up India’s first Cold Spray SMART Lab
Tags: Nanotechnology
Published on: 10 April 2019
Scientists develop Ultrasensitive Quantum Thermometer
Tags: Nanotechnology
Published on: 29 April 2019
Scientists develop plastic that can be recycled indefinitely
Tags: Nanotechnology
Published on: 16 May 2019
Scientists develop cancer cell detection ‘dots’ from coal
Tags: Nanotechnology
Published on: 20 June 2019
Researchers develop highly sensitive Hydrogen sensors
Tags: Nanotechnology
Published on: 26 August 2019
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<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>How Microbial fuel cells (MFCs) works?</strong></span></span></p>
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<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">In this fuel cell, carefully selected cohort of bacteria is made to act on the textile wastewater placed in it. These bacteria are isolated from very wastewater they are meant to degrade. </span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">They feed on organic material in water and break it down under anaerobic (without oxygen) conditions, releasing electrons in process. </span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The electrons are collected at anode which results in current in circuit. The bacteria forms biofilm on anode making collection of electrons easy at anode.</span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During this entire process, bacteria act on wastewater and purify it and waste is segregated in the cell. For example, dye present in wastewater is broken to simpler form.</span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">At present this technology has been tested in 200 litre capacity prototype, which can can generate power of around 1 watt per square-metre.</span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Scientists are also incorporating nanotechnology in it, to add nanotech filter to improve process to keep thickness of biofilm within prescribed limit.</span></span></li>
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<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">Generally, organic reactions are carried out using organic solvents, which makes it expensive and also generates toxic waste. </span></span></span></li>
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<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">Moreover, green oxidant (70% aqueous tert-butyl hydroperoxide-TBHP) was also used for converting toluene into benzoic acid.</span></span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">The use of Pt-BNP only produces benzoic acid and no other byproducts such as alcohol, aldehyde or ester is produced which are usually produced when toluene is oxidized.</span></span></span></li>
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<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">In this extreme conditions, potassium entered into so called chain-melted state, in which atomic chains dissolved into liquid and remaining potassium crystals stayed solid. </span></span></span></span></li>
<li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">This created state in which most of element's atoms form solid lattice structure which is partly solid and partly liquid and represented new stable state of matter.</span></span></span></span></li>
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'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">Indian Institute of Technology Madras has established ‘Cold Spray’ SMART (Surface Modification and Additive Research Technologies) Laboratory in collaboration with American conglomerate General Electric (GE). It is <strong>first of its kind High-Pressure Cold Spray (HPCS) facility</strong> in India that will be utilised to develop processes for <em>aero-engine applications</em>. </span></span></span></span></p>
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<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">The project is funded under Central Government’s ‘Uchchatar Avishkar Yojana’ (UAY), which is intended to boost collaboration between academia and private sector. Union Ministry of Human Resources Development was key investor along with Department of Science and Technology (DST), IIT Madras, and GE.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">The laboratory consists of state-of-the-art High-Pressure Cold Spray (HPCS) equipment imported from Plasma Giken, Japan. It will help in strengthening MRO ecosystem in the country. It will also help to develop advanced technology expertise and skill development of engineers in additive technology.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">High pressure cold spray </span></span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">It is different from other widely used thermal spray processes. In it, there is no melting and oxidation of powders. It produces high quality coatings. Moreover, deposition rates using it are very high which leads to less powder wastage and it can be used for additive manufacturing and repair of components. It has huge potential for depositing protective coatings and repair of components. The technology is already being used for repair of worn out components for defense applications</span></span></span></span></p>
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'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand","serif"">Researchers from Jamia Millia Islamia, New Delh have developed ultrasensitive quantum thermometer which can measure very minute micro Kelvin changes in temperature and has quick response time. </span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Ultrasensitive quantum thermometer </span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand","serif"">It has been developed using graphene quantum dots (GQDs) consisting of graphene oxide and mixed with ceramic (aluminium oxide) to produce.</span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Features:</span></strong><span style="font-family:"Quicksand","serif""> This thermometer has high sensitivity in measuring different temperatures and can measure very minute (micro Kelvin) changes in temperature. It has extreme quick response time of just about 300 milliseconds (msecs) to register change in temperature from 27 degree C to –196 degree C.</span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Applications:</span></strong><span style="font-family:"Quicksand","serif""> The device can be used in cryogenic temperature sensing. It will be useful in pharmaceutical industry, healthcare to measure incubation temperature of biological cells and molecules and automobile industry to measure ignition temperature within internal combustion engine (ICE).</span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Graphene Quantum Dots (GQDs)</span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand","serif"">They are semiconductor nanoparticles or nanocrystals, usually in range of 2-10 nanometers (10-50 atoms) in size. They are sometimes referred as ‘artificial atoms’. They are miniscule fragments, limited in size, or domains, of single-layer to tens of layers of graphene. They less toxic have photoluminescence, chemical stability. They are widely used for biological, opto-electronics, energy and environmental applications.</span></span></span></p>
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'title' => 'Scientists develop plastic that can be recycled indefinitely',
'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Scientists from US have created next-generation plastic named as Poly(Diketoenamine), or PDK that can be fully recycled for indefinite times. It can be fully recycled into new materials of any colour, shape, or form, without loss of performance or quality. It can also be disassembled into its constituent parts at the molecular level.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Problem with conventional Plastics</span></span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">All conventional plastics are made up of large molecules called polymers, which are composed of repeating units of shorter carbon-containing compounds called monomers.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">However, the problem with them is that the chemicals are added to give them specific characteristics — rigidity or flexibility. But these chemicals binds tightly to monomers and stay in the plastic even after it is been processed at recycling plant.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">During processing, plastics with different chemical compositions are mixed together and ground into bits. After these mishmash plastics are melted to make new material, it is difficult to predict what properties it will inherit from the original plastic.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">PDK Plastics</span></span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Unlike conventional plastics, monomers of PDK plastic could be recovered and freed from any compounded additives simply by putting material in highly acidic solution. </span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">The acid breaks down PDK polymers into monomers and also allows monomers to be separated from entwined chemical additives that give plastic its look and feel.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Thus, PDK plastic can be disassembled into its constituent parts at molecular level and then reassembled into different shape, texture, and color again and again without loss of performance or quality.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">It can find its applications in textiles, 3D printing, and foams. Besides, future research of incorporating PDK plastics with plant-based materials and other sustainable sources is undertaken to make it more environment friendly.</span></span></span></span></p>
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'description' => '<p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">Scientists from CSIR-NEIST Assam have developed chemical process that turns ‘dirty’ coal into biomedical ‘carbon quantum dots (CQDs)’ to help detect cancer cells.</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">What are CQDs?</span></span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">CQDs are carbon-based nanomaterials whose size is less than 10 nm, or nanometre. They are used as diagnostic tools for bio-imaging, especially in detecting cancer cells, for chemical sensing and in opto-electronics</span></span></span></span></p>
<p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">CQDs developed by CSIR-NEIST </span></span></strong></span></span></p>
<p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">It is made from cheap, abundant, low-quality and high-sulphur coals. It has high-stability, good-conductivity, low-toxicity, environmental friendliness, and good optical properties. It has fluorescent, bluish colour. Its price is one-twentieth the cost of imported CQDs. </span></span></span></span></p>
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'id' => (int) 2008,
'title' => 'Researchers develop highly sensitive Hydrogen sensors',
'description' => '<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Times New Roman","serif"">Issue</span></span></strong></span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">A sensor that can detect hydrogen gas even when present at extremely low concentration of 1 part per million (ppm) has been developed by researchers at the <strong>Indian Institute of Technology (IIT) Jodhpur</strong> in collaboration with <strong>IIT Hyderabad</strong>.</span></span></span></span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Times New Roman","serif"">Background</span></span></strong></span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:white"><span style="font-family:"Times New Roman","serif"">A hydrogen sensor is a gas detector that detects the presence of hydrogen. They contain micro-fabricated point-contact hydrogen sensors and are used to locate hydrogen leaks. They are considered low-cost, compact, durable, and easy to maintain as compared to conventional gas detecting instruments.</span></span></span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Times New Roman","serif"">Details</span></span></strong></span></span></p>
<ul>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">The developed sensor has 30% sensitivity to detect hydrogen at 1 ppm concentration and as high as 74% sensitivity when the concentration of the gas is 100 ppm. It takes about 25 seconds to detect hydrogen.</span></span></span></span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Carbon nanofibres with minute pores are decorated on the zinc oxide semiconductor. The carbon nanofibres increase adsorption of oxygen on the surface of the semiconductor. More oxygen adsorbed would mean the number of electrons available for conduction is reduced leading to increased resistance.</span></span></span></span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Hydrogen reacts with the adsorbed oxygen (to produce water molecule) thereby making more electrons available for current conduction..</span></span></span></span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">In the presence of hydrogen the resistance reduces drastically leading to more current flow, thus suggesting hydrogen gas leakage. When hydrogen is removed, the resistance goes back to the initial state.</span></span></span></span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">The researchers are able to activate the chemical reaction at a relatively lower temperature as carbon nanofibres are used. The nanomaterial increases the surface area and acts as a catalyst to reduce the activation energy.</span></span></span></span></span></p>
</li>
</ul>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Importance of discovery</span></span></span></span></strong></span></span></p>
<ul>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Hydrogen gas is a pollution-free, renewable source of energy and is seen as a fuel of choice in the future. However, hydrogen is highly explosive and flammable in nature. </span></span></span></span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">It is a small molecule and can readily mix with air but detecting hydrogen gas leakage become quite difficult particularly as it is colourless and tasteless. </span></span></span></span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">A sensor that can detect hydrogen even when present at very low concentration becomes essential. And this is where the current work becomes important.</span></span></span></span></span></p>
</li>
</ul>
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'tag' => 'Nanotechnology',
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'id' => (int) 2493,
'title' => 'Oral capsule for insulin intake',
'description' => '<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Issue</strong></span></span></p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Scientists have designed an oral capsule which can deliver insulin and other drugs, that otherwise have to be injected, directly to the lining of the small intestine and release them for uptake into the bloodstream.</span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Background</strong></span></span></p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Many drugs, especially those made of proteins, cannot be taken orally because they are broken down in the gastrointestinal tract before they can take effect.</span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Details</strong></span></span></p>
<ul>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The researchers at Massachusetts Institute of Technology (MIT) have designed a new drug capsule that can carry insulin or other protein drugs and protect them from the harsh environment of the gastrointestinal tract.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">When the capsule reaches the small intestine, it breaks down to reveal dissolvable micro-needles that attach to the intestinal wall and release drug for uptake into the bloodstream.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During tests in pigs, the researchers showed that this capsule could load a comparable amount of insulin to that of an injection, enabling fast uptake into the bloodstream after the micro-needles were released.</span></span></p>
</li>
<li>
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<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Scientists have designed an oral capsule which can deliver insulin and other drugs, that otherwise have to be injected, directly to the lining of the small intestine and release them for uptake into the bloodstream.</span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Background</strong></span></span></p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Many drugs, especially those made of proteins, cannot be taken orally because they are broken down in the gastrointestinal tract before they can take effect.</span></span></p>
<p style="margin-right:0in"> </p>
<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Details</strong></span></span></p>
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<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The researchers at Massachusetts Institute of Technology (MIT) have designed a new drug capsule that can carry insulin or other protein drugs and protect them from the harsh environment of the gastrointestinal tract.</span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During tests in pigs, the researchers showed that this capsule could load a comparable amount of insulin to that of an injection, enabling fast uptake into the bloodstream after the micro-needles were released.</span></span></p>
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It uses simple principle to degrade wastewater. This energy-efficient technology can be also used with any other industrial wastewater.</span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>How Microbial fuel cells (MFCs) works?</strong></span></span></p> <ul> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">In this fuel cell, carefully selected cohort of bacteria is made to act on the textile wastewater placed in it. These bacteria are isolated from very wastewater they are meant to degrade. </span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">They feed on organic material in water and break it down under anaerobic (without oxygen) conditions, releasing electrons in process. </span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The electrons are collected at anode which results in current in circuit. The bacteria forms biofilm on anode making collection of electrons easy at anode.</span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During this entire process, bacteria act on wastewater and purify it and waste is segregated in the cell. For example, dye present in wastewater is broken to simpler form.</span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">At present this technology has been tested in 200 litre capacity prototype, which can can generate power of around 1 watt per square-metre.</span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Scientists are also incorporating nanotechnology in it, to add nanotech filter to improve process to keep thickness of biofilm within prescribed limit.</span></span></li> </ul> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'microbial-fuel-cell-to-treat-textile-wastewater', 'image' => 'https://www.mediafire.com/convkey/edf9/fwqy46c1ew91btc6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/edf9/fwqy46c1ew91btc6g.jpg', 'metatitle' => 'Scientist develop microbial fuel cell to treat textile wastewater', 'metakeyword' => 'Scientist develop microbial fuel cell to treat textile wastewater', 'metadescription' => 'In Science and Technology Current Affairs, Scientists develop microbial fuel cell to treat textile wastewater', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'http://www.mediafire.com/file/4xom8zbmcip1h39/4.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 1 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 595, 'title' => 'IIT Madras converts petroleum waste toluene into useful product', 'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">Scientists from Indian Institute of Technology (IIT) Madras have successfully converted petroleum waste-product toluene into benzoic acid. It uses environment friendly conversion process by using green catalyst and water instead of organic acid as solvent. Benzoic acid is used as food preservative (E210) and medicine for fungal and bacterial infection.</span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand",serif">Key Facts</span></strong></span></span></p> <ul> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">Toluene was converted into benzoic acid through selective and controlled oxidation in presence of catalyst — binaphthyl-stabilised platinum nanoparticles (Pt-BNP).</span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">Generally, organic reactions are carried out using organic solvents, which makes it expensive and also generates toxic waste. </span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">To overcome this problem, scientists used water as solvent to make it environment-friendly. </span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">Moreover, green oxidant (70% aqueous tert-butyl hydroperoxide-TBHP) was also used for converting toluene into benzoic acid.</span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand",serif">The use of Pt-BNP only produces benzoic acid and no other byproducts such as alcohol, aldehyde or ester is produced which are usually produced when toluene is oxidized.</span></span></span></li> </ul> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'iit-madras-converts-petroleum-waste-toluene-into-useful-product', 'image' => 'https://www.mediafire.com/convkey/6d4e/gv38ivqjhz6p6dt6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/6d4e/gv38ivqjhz6p6dt6g.jpg', 'metatitle' => 'IIT Madras converts petroleum waste toluene into useful product', 'metakeyword' => 'In Science and Technology Current Affairs, IIT Madras converts petroleum waste toluene into useful product', 'metadescription' => 'IIT Madras converts petroleum waste toluene into useful product. Scientists from Indian Institute of Technology (IIT) Madras have successfully converted petroleum', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'https://www.mediafire.com/file/ucqmbld3nvq57gb/IIT_Madras_converts.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 2 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 725, 'title' => 'Scientists discover new state of matter', 'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">Scientists have discovered new state of physical matter recently which is solid and liquid at the same time. The new state shows that atoms can exist as both solid and liquid simultaneously. Prior to this discovery, it was unclear if unusual structures represented distinct state of matter or existed as transition stages between two distinct states.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">Discovery</span></span></strong></span></span></p> <ul> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">The new state of matter was discovered after applying high pressures (20,000 and 40,000 times atmospheric pressure) and temperatures ((260 to 980 degrees Fahrenheit), to Potassium (K), a simple metal. </span></span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">In this extreme conditions, potassium entered into so called chain-melted state, in which atomic chains dissolved into liquid and remaining potassium crystals stayed solid. </span></span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">This created state in which most of element's atoms form solid lattice structure which is partly solid and partly liquid and represented new stable state of matter.</span></span></span></span></li> <li style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">Under the right conditions, over half dozen elements, including sodium and bismuth are capable of existing in newly discovered state of matter. </span></span></span></span></li> </ul> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'scientists-discover-new-state-of-matter', 'image' => 'https://www.mediafire.com/convkey/ea22/65b7uoba8l4pg9w6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/ea22/65b7uoba8l4pg9w6g.jpg', 'metatitle' => 'Scientists discover new state of matter | Daily Current Affairs', 'metakeyword' => 'In Science and Technology Current Affairs, Scientists discover new state of matter', 'metadescription' => 'Scientists discover new state of matter, scientists have discovered new state of physical matter recently which is solid and liquid at the same time.', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'https://www.mediafire.com/file/xix76tcj987ukkz/Scientists_discover.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 3 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 723, 'title' => 'IIT Madras to set up India’s first Cold Spray SMART Lab', 'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">Indian Institute of Technology Madras has established ‘Cold Spray’ SMART (Surface Modification and Additive Research Technologies) Laboratory in collaboration with American conglomerate General Electric (GE). It is <strong>first of its kind High-Pressure Cold Spray (HPCS) facility</strong> in India that will be utilised to develop processes for <em>aero-engine applications</em>. </span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">Cold Spray SMART Lab</span></span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">The project is funded under Central Government’s ‘Uchchatar Avishkar Yojana’ (UAY), which is intended to boost collaboration between academia and private sector. Union Ministry of Human Resources Development was key investor along with Department of Science and Technology (DST), IIT Madras, and GE.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">The laboratory consists of state-of-the-art High-Pressure Cold Spray (HPCS) equipment imported from Plasma Giken, Japan. It will help in strengthening MRO ecosystem in the country. It will also help to develop advanced technology expertise and skill development of engineers in additive technology.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">High pressure cold spray </span></span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="font-family:"Quicksand",serif">It is different from other widely used thermal spray processes. In it, there is no melting and oxidation of powders. It produces high quality coatings. Moreover, deposition rates using it are very high which leads to less powder wastage and it can be used for additive manufacturing and repair of components. It has huge potential for depositing protective coatings and repair of components. The technology is already being used for repair of worn out components for defense applications</span></span></span></span></p> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'iit-madras-set-up-india-first-cold-spray-mart-lab', 'image' => 'https://www.mediafire.com/convkey/9804/cgaqudz0lb5pgd36g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/9804/cgaqudz0lb5pgd36g.jpg', 'metatitle' => 'IIT Madras to set up India’s first Cold Spray SMART Lab', 'metakeyword' => 'In Science and Technology Current Affairs, IIT Madras to set up India’s first Cold Spray SMART Lab', 'metadescription' => 'IIT Madras to set up India’s first Cold Spray SMART Lab, Indian Institute of Technology Madras has established ‘Cold Spray’ SMART (Surface Modification and Additive Research Technologies) ', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'https://www.mediafire.com/file/ullks6a1u9njaca/IIT_Madras_to_set_up_India_s.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 4 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 936, 'title' => 'Scientists develop Ultrasensitive Quantum Thermometer', 'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand","serif"">Researchers from Jamia Millia Islamia, New Delh have developed ultrasensitive quantum thermometer which can measure very minute micro Kelvin changes in temperature and has quick response time. </span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Ultrasensitive quantum thermometer </span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand","serif"">It has been developed using graphene quantum dots (GQDs) consisting of graphene oxide and mixed with ceramic (aluminium oxide) to produce.</span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Features:</span></strong><span style="font-family:"Quicksand","serif""> This thermometer has high sensitivity in measuring different temperatures and can measure very minute (micro Kelvin) changes in temperature. It has extreme quick response time of just about 300 milliseconds (msecs) to register change in temperature from 27 degree C to –196 degree C.</span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Applications:</span></strong><span style="font-family:"Quicksand","serif""> The device can be used in cryogenic temperature sensing. It will be useful in pharmaceutical industry, healthcare to measure incubation temperature of biological cells and molecules and automobile industry to measure ignition temperature within internal combustion engine (ICE).</span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-family:"Quicksand","serif"">Graphene Quantum Dots (GQDs)</span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:"Quicksand","serif"">They are semiconductor nanoparticles or nanocrystals, usually in range of 2-10 nanometers (10-50 atoms) in size. They are sometimes referred as ‘artificial atoms’. They are miniscule fragments, limited in size, or domains, of single-layer to tens of layers of graphene. They less toxic have photoluminescence, chemical stability. They are widely used for biological, opto-electronics, energy and environmental applications.</span></span></span></p> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'ultrasensitive-quantum-thermometer', 'image' => 'https://www.mediafire.com/convkey/fe63/eugapqbdcb532dr6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/fe63/eugapqbdcb532dr6g.jpg', 'metatitle' => 'Scientists develop Ultrasensitive Quantum Thermometer', 'metakeyword' => 'In Science and Technology Current Affairs, Researchers, Jamia Millia Islamia, New Delh, develop, ultrasensitive quantum thermometer, graphene quantum dots (GQDs) ', 'metadescription' => 'Researchers from Jamia Millia Islamia, New Delh have developed ultrasensitive quantum thermometer', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'https://www.mediafire.com/file/iro4y5stacs2eqr/Scientists_develop.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 5 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 1107, 'title' => 'Scientists develop plastic that can be recycled indefinitely', 'description' => '<p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Scientists from US have created next-generation plastic named as Poly(Diketoenamine), or PDK that can be fully recycled for indefinite times. It can be fully recycled into new materials of any colour, shape, or form, without loss of performance or quality. It can also be disassembled into its constituent parts at the molecular level.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Problem with conventional Plastics</span></span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">All conventional plastics are made up of large molecules called polymers, which are composed of repeating units of shorter carbon-containing compounds called monomers.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">However, the problem with them is that the chemicals are added to give them specific characteristics — rigidity or flexibility. But these chemicals binds tightly to monomers and stay in the plastic even after it is been processed at recycling plant.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">During processing, plastics with different chemical compositions are mixed together and ground into bits. After these mishmash plastics are melted to make new material, it is difficult to predict what properties it will inherit from the original plastic.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">PDK Plastics</span></span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Unlike conventional plastics, monomers of PDK plastic could be recovered and freed from any compounded additives simply by putting material in highly acidic solution. </span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">The acid breaks down PDK polymers into monomers and also allows monomers to be separated from entwined chemical additives that give plastic its look and feel.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">Thus, PDK plastic can be disassembled into its constituent parts at molecular level and then reassembled into different shape, texture, and color again and again without loss of performance or quality.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in; text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:10.0pt"><span style="font-family:"Quicksand","serif"">It can find its applications in textiles, 3D printing, and foams. Besides, future research of incorporating PDK plastics with plant-based materials and other sustainable sources is undertaken to make it more environment friendly.</span></span></span></span></p> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => ' pdk-plastic-recycled-indefinitely', 'image' => 'https://www.mediafire.com/convkey/23ca/7adgn78d814dxek6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/23ca/7adgn78d814dxek6g.jpg', 'metatitle' => 'Scientists develop plastic that can be recycled indefinitely', 'metakeyword' => 'In Science and Technology Current Affairs, Scientists,US, created, next-generation plastic,s Poly (Diketoenamine), PDK , fully , recycled, indefinite times', 'metadescription' => 'Scientists from US have created next-generation plastic named as Poly(Diketoenamine), or PDK  that can be fully recycled for indefinite times. ', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'https://www.mediafire.com/file/38rycduaeojb78m/Scientists_develop.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 6 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 1491, 'title' => 'Scientists develop cancer cell detection ‘dots’ from coal', 'description' => '<p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">Scientists from CSIR-NEIST Assam have developed chemical process that turns ‘dirty’ coal into biomedical ‘carbon quantum dots (CQDs)’ to help detect cancer cells.</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">What are CQDs?</span></span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">CQDs are carbon-based nanomaterials whose size is less than 10 nm, or nanometre. They are used as diagnostic tools for bio-imaging, especially in detecting cancer cells, for chemical sensing and in opto-electronics</span></span></span></span></p> <p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">CQDs developed by CSIR-NEIST </span></span></strong></span></span></p> <p style="margin-left:0in; margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:9.0pt"><span style="font-family:"Quicksand","serif"">It is made from cheap, abundant, low-quality and high-sulphur coals. It has high-stability, good-conductivity, low-toxicity, environmental friendliness, and good optical properties. It has fluorescent, bluish colour. Its price is one-twentieth the cost of imported CQDs. </span></span></span></span></p> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'scientists-develop-cancer-cell-detection-dots', 'image' => 'https://www.mediafire.com/convkey/bb73/nyk1r7bdz1fdlfd6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/bb73/nyk1r7bdz1fdlfd6g.jpg', 'metatitle' => 'Scientists develop cancer cell detection ‘dots’ from coal', 'metakeyword' => 'Scientists from CSIR-NEIST Assam have developed chemical process that turns ‘dirty’ coal into biomedical ‘carbon quantum dots (CQDs)’ to help detect cancer cells.', 'metadescription' => 'Scientists from CSIR-NEIST Assam have developed chemical process that turns ‘dirty’ coal into biomedical ‘carbon quantum dots (CQDs)’ to help detect cancer cells.', 'author' => 'Nikhil Paigude', 'downlaodpdf' => 'https://www.mediafire.com/file/qjh3k8f8u16nuw8/Scientists_develop.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 7 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 2008, 'title' => 'Researchers develop highly sensitive Hydrogen sensors', 'description' => '<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Times New Roman","serif"">Issue</span></span></strong></span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">A sensor that can detect hydrogen gas even when present at extremely low concentration of 1 part per million (ppm) has been developed by researchers at the <strong>Indian Institute of Technology (IIT) Jodhpur</strong> in collaboration with <strong>IIT Hyderabad</strong>.</span></span></span></span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Times New Roman","serif"">Background</span></span></strong></span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:white"><span style="font-family:"Times New Roman","serif"">A hydrogen sensor is a gas detector that detects the presence of hydrogen. They contain micro-fabricated point-contact hydrogen sensors and are used to locate hydrogen leaks. They are considered low-cost, compact, durable, and easy to maintain as compared to conventional gas detecting instruments.</span></span></span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="font-family:"Times New Roman","serif"">Details</span></span></strong></span></span></p> <ul> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">The developed sensor has 30% sensitivity to detect hydrogen at 1 ppm concentration and as high as 74% sensitivity when the concentration of the gas is 100 ppm. It takes about 25 seconds to detect hydrogen.</span></span></span></span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Carbon nanofibres with minute pores are decorated on the zinc oxide semiconductor. The carbon nanofibres increase adsorption of oxygen on the surface of the semiconductor. More oxygen adsorbed would mean the number of electrons available for conduction is reduced leading to increased resistance.</span></span></span></span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Hydrogen reacts with the adsorbed oxygen (to produce water molecule) thereby making more electrons available for current conduction..</span></span></span></span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">In the presence of hydrogen the resistance reduces drastically leading to more current flow, thus suggesting hydrogen gas leakage. When hydrogen is removed, the resistance goes back to the initial state.</span></span></span></span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">The researchers are able to activate the chemical reaction at a relatively lower temperature as carbon nanofibres are used. The nanomaterial increases the surface area and acts as a catalyst to reduce the activation energy.</span></span></span></span></span></p> </li> </ul> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong><span style="font-size:12.0pt"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Importance of discovery</span></span></span></span></strong></span></span></p> <ul> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">Hydrogen gas is a pollution-free, renewable source of energy and is seen as a fuel of choice in the future. However, hydrogen is highly explosive and flammable in nature. </span></span></span></span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">It is a small molecule and can readily mix with air but detecting hydrogen gas leakage become quite difficult particularly as it is colourless and tasteless. </span></span></span></span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="background-color:whitesmoke"><span style="font-family:"Times New Roman","serif""><span style="color:#282828">A sensor that can detect hydrogen even when present at very low concentration becomes essential. And this is where the current work becomes important.</span></span></span></span></span></p> </li> </ul> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'researchers-develop-highly-sensitive-hydrogen-sensors', 'image' => 'https://www.mediafire.com/convkey/2369/0hmu1o53qiiiwnu6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/2369/0hmu1o53qiiiwnu6g.jpg', 'metatitle' => 'Researchers develop highly sensitive Hydrogen sensors', 'metakeyword' => 'Researchers develop highly sensitive Hydrogen sensors, Hydrogen sensors', 'metadescription' => 'A sensor that can detect hydrogen gas even when present at extremely low concentration of 1 part per million (ppm) has been developed by researchers ', 'author' => null, 'downlaodpdf' => 'https://www.mediafire.com/file/rohj00jgkexwlcd/researchers_develop_highly.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' }, (int) 8 => object(Cake\ORM\Entity) { 'tag' => 'Nanotechnology', 'keyword' => 'nanotechnology', 'id' => (int) 2493, 'title' => 'Oral capsule for insulin intake', 'description' => '<p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Issue</strong></span></span></p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Scientists have designed an oral capsule which can deliver insulin and other drugs, that otherwise have to be injected, directly to the lining of the small intestine and release them for uptake into the bloodstream.</span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Background</strong></span></span></p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Many drugs, especially those made of proteins, cannot be taken orally because they are broken down in the gastrointestinal tract before they can take effect.</span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Details</strong></span></span></p> <ul> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The researchers at Massachusetts Institute of Technology (MIT) have designed a new drug capsule that can carry insulin or other protein drugs and protect them from the harsh environment of the gastrointestinal tract.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">When the capsule reaches the small intestine, it breaks down to reveal dissolvable micro-needles that attach to the intestinal wall and release drug for uptake into the bloodstream.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During tests in pigs, the researchers showed that this capsule could load a comparable amount of insulin to that of an injection, enabling fast uptake into the bloodstream after the micro-needles were released.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">To allow their capsule to reach the small intestine and perform these micro-injections, the researchers coated it with a polymer that can survive the acidic environment of the stomach, which has a pH of 1.5 to 3.5.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">When the capsule reaches the small intestine, the higher pH (around 6) triggers it to break open and three folded arms inside the capsule spring open and attach the needles to the lining to deliver insulin.</span></span></p> </li> </ul> ', 'created_date' => object(Cake\I18n\FrozenDate) {}, 'posturl' => 'oral-capsule-for-insulin-intake', 'image' => 'https://www.mediafire.com/convkey/caf5/somh85cajpkp5bo6g.jpg', 'fbimage' => 'https://www.mediafire.com/convkey/caf5/somh85cajpkp5bo6g.jpg', 'metatitle' => 'Oral capsule for insulin intake', 'metakeyword' => 'Oral capsule for insulin intake', 'metadescription' => 'Scientists have designed an oral capsule which can deliver insulin and other drugs, that otherwise have to be injected, ', 'author' => null, 'downlaodpdf' => 'https://www.mediafire.com/file/md156xltk660ev4/Oral_capsule_for_insulin_intake.pdf/file', '[new]' => false, '[accessible]' => [ [maximum depth reached] ], '[dirty]' => [[maximum depth reached]], '[original]' => [[maximum depth reached]], '[virtual]' => [[maximum depth reached]], '[errors]' => [[maximum depth reached]], '[invalid]' => [[maximum depth reached]], '[repository]' => 'currentaffairs' } ] $tagname = 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otherwise have to be injected, directly to the lining of the small intestine and release them for uptake into the bloodstream.</span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Background</strong></span></span></p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Many drugs, especially those made of proteins, cannot be taken orally because they are broken down in the gastrointestinal tract before they can take effect.</span></span></p> <p style="margin-right:0in"> </p> <p style="margin-right:0in"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Details</strong></span></span></p> <ul> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The researchers at Massachusetts Institute of Technology (MIT) have designed a new drug capsule that can carry insulin or other protein drugs and protect them from the harsh environment of the gastrointestinal tract.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">When the capsule reaches the small intestine, it breaks down to reveal dissolvable micro-needles that attach to the intestinal wall and release drug for uptake into the bloodstream.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During tests in pigs, the researchers showed that this capsule could load a comparable amount of insulin to that of an injection, enabling fast uptake into the bloodstream after the micro-needles were released.</span></span></p> </li> <li> <p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">To allow their capsule to reach the small intestine and perform these micro-injections, the researchers coated it with a polymer that can survive the acidic environment of the stomach, which has a pH 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