💥Mains Ready By December. Smash Mains & Smash PYQ Admissions Open
Talk to Mentor

Civilsdaily

Login

GS Paper: GS3-16.Achievements of Indians in Science & Technology

  • Solar energy & India

     

    Context

    • Tesla and SpaceX CEO Elon Musk has said that civilisation will be mostly solar-powered in the future, a world without Sun will turn into a dark ice ball as the Earth gets all of its energy from it.

    Definition of solar energy

    • Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity, solar thermal energy, and solar architecture.

    India’s solar target.

    • Target: India is targeting about 500 GW by 2030, of renewable energy deployment, out of which ~280 GW is expected from solar PV. This necessitates the deployment of nearly 30 GW of solar capacity every year until 2030.
    • Commitment: Solar power is a major prong of India’s commitment to address global warming according to the terms of the Paris Agreement, as well as achieving net zero, or no net carbon emissions, by 2070.

    International solar alliance and India’s pledge

    • Climate action commitment: It symbolizes about the sincerity of the developing nations towards their concern about climate change and to switch to a low-carbon growth path.
    • Clean energy: India’s pledge to the Paris summit offered to bring 40% of its electricity generation capacity from non-fossil sources (renewable, large hydro, and nuclear) by 2030.
    • Global electrification: India has pledged to let solar energy reach to the most unconnected villages and communities and also towards creating a clean planet.
    • Global cooperation: It is based on world cooperation irrespective of global boundaries.
    • India’s Soft power: For India, possible additional benefits from the alliance can be a strengthening of ties with the major African countries and increasing goodwill for India among them.

    Some Interesting facts

    Solar power is the most abundant energy source on earth.

    Solar is the cheapest source of energy in the world.

    Solar electricity has been around since 1839.

    Solar panels can produce power without direct sunlight.

    Challenges before solar future

    • High Imports: Indian solar deployment or installation companies depend heavily on imports. It currently imports 100% of silicon wafers and around 80% of cells even at the current deployment levels.
    • Field deployment: Also, out of the 15 GW of module manufacturing capacity, only 3-4 GW of modules are technologically competitive and worthy of deployment in grid-based projects.
    • Land issue: Land, the most expensive part of solar projects, is scarce in India — and Indian industry has no choice but to move towards newer and superior technologies as part of expansion plans.
    • Lack of investment: India has hardly invested in this sector which can help the industry to try and test the technologies in a cost-effective manner.

    Way forward

    • Supportive policies and innovative technological approaches are needed for the sector to achieve its potential.
    • Indian policymakers need to plan for rooftop solar plus storage, rather than rooftop solar alone with the grid as storage (net / gross metering).
    • The declining cost of storage solutions, along with that of rooftop solar solutions, is likely to change the future of the Indian power sector.

    Conclusion

    • In the foreseeable future, one can witness a just and equitable energy order if solar energy, along with other forms of renewable energy, can be harnessed more positively.

    Mains question

    Q. Fossil fuels have a 60% share in India’s total energy mix in this context discuss solar future for India with challenges for the same.

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • Scientific temper

    Context

    • India has not produced any Nobel Prize winner in science in the last 85 years — largely because of the lack of a scientific environment in the country.

    What is scientific temper?

    • Jawaharlal Nehru coined the term ‘scientific temper’; he defines it as an attitude of logical and rational thinking. An individual is considered to have scientific temper if she employs the scientific method when making decisions.

    Why it is important?

    • Scientific temper is very important for bringing forth a progressive society. It is free from superstitions. Irrational practices in developing the nation are in all aspects like political, economic and social.

    Its components

    • The vital parts of scientific temper are discussion, argument, and analysis. Various elements like fairness, equality, and democracy. The most important characteristic of a scientific temper is: – untiring search for truth with an open mind and spirit of inquiry.

    Constitutional mandate of scientific temper

    • In 1976, the Government of India reemphasised its commitment to cultivate scientific temper through a constitutional amendment (Article 51A).
    • Article 51A in the 42nd Amendment of the Constitution in 1976 says “It shall be the duty of every citizen of Indian to develop the scientific temper, humanism and the spirit of enquiry and reform.”

    Importance of scientific temper in nation building

    • Formation of public policy: Scientific temperament can become a part of the policy formation and plan through analyzing the performance of our nations, especially all the hardships and shortfalls that occurred in the past years.
    • Self -Reliance: There is a relationship between scientific temperament and becoming self-reliant. Our country is becoming self-reliant with the available technology and industrial infrastructure.
    • Quality education: It will help the children to assimilate the knowledge acquired through the practical observations in a scientific framework; thus, laying down a basis for the growth of a scientific perspective in the children.

    scientific temperChallenges before scientific temper

    • Political unwillingness: Most of the policymakers and the politicians to increase their vote banks include the stagnant ideologies and beliefs of the people in their public policies, and the government tends to give away in the popular public opinion rather than try to improve their thinking by including a more scientific approach to the various societal problems.
    • Prevalent orthodoxy: In India, people still have an orthodox ideology and will not adhere to the scientifically obtained solutions.
    • Low budget: Even after seventy years of independence, Indian Scientists are working on tight budgets, and they don’t have resources like other nations for conducting scientific research.
    • Pseudoscience: Pseudoscience is everywhere, whether in denying the science of climate change or the evolution theory that explains the secret of diversity that we see around us.

    Value addition / case study / Innovation

    An IIT Kanpur alumni Mr.Arvind Gupta tries to inculcate a spirit of inquiry among children through toys made from inexpensive everyday items.


    What can be done?

    • Directional efforts: Activities focused on school children can be undertaken like nature walks, visit to museums etc. ‘Science Express’, a collaborative effort of Ministry of railways and Ministry of Environment & Forests & Climate Change, is a progressive step because it provides a platform that can expose children and common people in far-flung areas of the country to scientific aspects of our everday life.
    • Policy initiatives: Children’s Science Congress organized by National Council for Science & Technology Communication (NCSTC) is a good way to encourage scientific temper in children.
    • Public initiative: Civil Society organizations like, Kerala Sastra Sahitya Parishad (KSSP) and Delhi Science Forum, which are People’s Science Movement, can also go a long way in boosting scientific temper amongst the community.
    • From Sensationalism to Sensible Science Journalism:The media must monitor the content to discourage and limit superstition and blind belief.
    • Scientific journalism: Science communicators do the critical job of bridging the gap between science, society, and policymakers. Science journalism should be promoted at the university level. Science agencies should fund science communication activities in their domains.
    • From Exclusive to Inclusive Science: Inequitable participation concerning gender and social diversity must be eliminated. The ‘open source science’ or ‘open science’ movement includes, at the core, open access, open data, open-source, and available standards that offer unfettered dissemination of scientific discourse.
    • Open science: Government has a significant role in facilitating open science and promoting and preserving a free-thinking, open-minded society.

    Conclusion

    • Let’s hope that someday all cultures free themselves from the shackles of blind faith  with science likely to play a major hand in this endeavour. Unto a similar goal, we should celebrate India’s constitutional provision for the scientific temper and vigorously safeguard it.

    Mains question

    Q. The shrinking space for scientific temper in India today is worrisome for some reasons. Do you think so? Identify these reasons and suggest way forward for scientific future of India.

    Discuss the importance of scientific temper, what kind of public culture is needed to advance it? 10 Marks

    Q.4 Explain why superstitious beliefs and practices abound in India. In this context, discuss the importance of inculcating scientific temper to remove superstitions. (10 Marks)

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • Journey towards innovation

    Context

    • Senior scientist Nallathamby Kalaiselvi was appointed the director general of the Council of Scientific and Industrial Research (CSIR), on Saturday, August 6, 2022. This makes her the first woman to head the largest research and development organisation in India, which runs 38 laboratories and institutes, 39 outreach centres, and three innovation centres. 

    What is CSIR?

    • The Council of Scientific and Industrial Research, abbreviated as CSIR, was established by the Government of India in September 1942 as an autonomous body that has emerged as the largest research and development organisation in India.
    • CSIR covers a wide spectrum of science and technology – from oceanography, geophysics, chemicals, drugs, genomics, biotechnology and nanotechnology to mining, aeronautics, instrumentation, environmental engineering and information technology.

    Who established it?

    • Dr Shanti Swarup Bhatnagar
    • He was the Founder Director (and later first Director-General) of CSIR who is credited with establishing twelve national laboratories. He played a significant role in the building of post-independent Science and Technology infrastructure and in the formulation of India’s S & T policies

    CSIR’s Vision

    • “Pursue science which strives for global impact, technology that enables innovation – driven industry and nurture trans-disciplinary leadership thereby catalyzing inclusive economic development for the people of India”

    Why CSIR is important?

    • Innovation: Regarding intellectual property, the CSIR has over 2971 patents filed internationally with 1592 patents filed in India. Since its inception in 1942 over 14000 patents have been granted worldwide. It was awarded the National Intellectual Property Award in 2018 by the India Patent Office.
    • Pandemic handling: CSIR identified the unmet needs, assessed its strengths and capabilities for addressing the pandemic and adopted a multi-pronged strategy of working on diagnostics, surveillance, drugs, hospital assistive devices, personal protective equipment and supply chain and logistics. This strategy is now beginning to yield exciting solutions.

    Contribution of CSIR

    Strategic Sector

    • Head-Up-Display (HUD) In high-tech areas, CSIR-NAL made significant contribution by developing indigenous Head-Up- display(HUD) for Indian Light Combat Aircraft, Tejas. HUD aids the pilot in flying the aircraft and in critical flight maneuvers including weapon aiming.
    • Design and Development of Indigenous Gyrotron: Addressing the challenges of technology denial:Design and development of indigenous gyrotron for nuclear fusion reactor has been accomplished.

    Energy & Environment

    • Solar Tree: On July 22nda solar tree designed by CSIR- CMERI lab in Durgapur was  launched which occupies minimum space to produce clean power.
    • Wax Deoiling Technology:Technology developed for recovery of wax developed in collaboration with Engineers India Limited (EIL) and Numaligarh Refinery Ltd., (NRL). Country’s largest wax producing (50,000 metric ton) plant has been commissioned at NRL with investment of over Rs 600 crore.

    Value added Agriculture

    • Medicinal and Aromatic Plants:Enhanced cultivation of Medicinal and Aromatic Plants in the country brought about through development of new varieties and agro-technologies.
    • Samba Mahsuri Rice Variety – Bacterial Blight Resistant:CSIR has in collaboration with DRR (ICAR) and DBT part funding developed an improved bacterial blight resistant Samba Mahsuri variety.
    • Rice Cultivar (Muktashree) for Arsenic Contaminated Areas:A rice variety has been developed which restricts assimilation of Arsenic within permissible limit. The variety has been released to farmers of West Bengal.
    • White-fly resistant Cotton variety:Developed a transgenic cotton line which is resistant to whiteflies. It is expected to render it commercially cultivable in 10 years, after due regulatory clearances.

    Healthcare

    • JD Vaccine for Farm Animals:Vaccine developed and commercialized for Johne’s disease affecting Sheep, Goat, Cow and Buffalo so as to immunize them and increase milk and meat production.
    • Plasma Gelsolin Diagnostic Kit for Premature Births, and Sepsis related Deaths:A new kit is being developed to diagnose pre-mature birth and sepsis.
    • Genomics and other omics technologies for Enabling Medical Decision – GOMED: Genetic diseases, though are individually rare, cumulatively affect a large number of individuals. A programme called GOMED (Genomics and other omics technologies for Enabling Medical Decision) has been developed by the CSIR which provides a platform of disease genomics to solve clinical problems.

      Food & Nutrition

    • Ksheer-scanner: The Ksheer Scanner, a new technological invention by CSIR-CEERI detects the level of milk adulteration and adulterants in 45 seconds at the cost of 10 paise,
    • Double-Fortified Salt:Salt fortified with iodine and iron having improved properties developed and tested for addressing anaemia in people. To be launched in the market soon.
    • Anti-obesity DAG Oil:Oil enriched with Diacylglycerol (DAG) instead of conventional triacylglycerol (TAG) developed. To be launched in the market soon.

    Water

    • Aquifer Mapping of Water Scarce Areas: Heliborne transient electromagnetic and surface magnetic technique based aquifer mapping carried out in six different geological locations in Rajasthan (2), Bihar, Karnataka, Maharashtra and Tamil Nadu.
    • Understanding the Special Properties of the Ganga Water:Assessment of Water Quality & Sediment Analysis of Ganga from different parts being done.

    Some of the challenges faced for sustainable growth of R&D in India are

    • Low research professionals: India has an estimated full-time equivalent R&D professional strength of only 150 professionals per million, compared to that of other countries.
    • Low investment: Indian research is mostly skewed towards basic research and lacks in application oriented R&D. The vast majority of organizations would rather go for quick acquisition of technology rather than invest in internal R&D.
    • IPR enforcement: Inadequate enforcement of intellectual property rights (IPR). While India has improved its IPR regime, the protection of intellectual property remains weak in some areas owing to inadequate laws and ineffective enforcement.

    Some positive suggestions to improve innovation

    • Embrace technology: Technologies, such as machine learning, can be used to improve R&D decision-making. Documents need to be filed throughout the R&D process, for example, and the process could be automated to free up employees to do more complex tasks.
    • Invest in innovation hubs: Companies that invest in innovation hubs expand talent and relationships with local universities and startups can support a two-way learning process and faster innovation cycles.
    • Promoting startups: Most radical innovations are coming from startups and more of them are needed. Tilting higher education towards science and encouraging more students to take degrees in science-based subjects can provide the people needed for R&D.

    Conclusion

    India is a strong contender in the field of Global R&D. For India to derive maximum growth and sustainability of R&D, its R&D fundamentals have to be strong and excellent.

    Mains question

    Q.Culture of innovation is needed in national growth in this context discuss what is IPR regime? How CSIR has helped to consolidate it?

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

     

     

  • Indian Virtual Herbarium, biggest database of country’s flora, is a global hit

    With details of about one lakh plant specimens, the Indian Virtual Herbarium, the biggest virtual database of flora in the country, is generating a lot of interest and turning out to be an eye-catching endeavour.

    Indian Virtual Herbarium

    • A herbarium specimen is consists of dried plant parts with labelled information on Scientific name and collection data.
    • It has immense use in plant identification, systematics studies and ecological studies.
    • The Botanical Survey of India has more than 30,00,000 herbarium specimens persevered in different herbaria located in different parts of the country.
    • Developed by scientists of the Botanical Survey of India (BSI), the herbarium was inaugurated by Union Minister of Environment Forest and Climate Change in Kolkata last month.

    Why in news?

    • Since launch, the portal ivh.bsi.gov.in has had nearly two lakh hits from 55 countries.
    • The portal includes about one lakh images of herbarium specimens.
    • Each record in the digital herbarium includes an image of the preserved plant specimen, scientific name, collection locality, and collection date, collector name, and barcode number.
    • The digital herbarium includes features to extract the data State-wise, and users can search plants of their own States, which will help them identify regional plants and in building regional checklists.

    Significance of the herbaria

    • Scientists say that there are approximately three million plant specimens in the country which are with different herbaria located at zonal centres of the BSI.
    • About 52% of our type specimens are from foreign nations and collected from 82 countries of the world during the British-era.
    • The herbarium is also deeply linked with the botanical history of the country.
    • The portal provides most valuable historical collections of botanists like William Roxburgh, Nathaniel Wallich and Joseph Dalton Hooker, considered the founding fathers of botany in India.
    • The digital herbarium has some of the oldest botanical specimens dating as early as 1696.

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • Karnataka tops India Innovation Index List

    Karnataka has bagged the top rank in NITI Aayog’s India Innovation Index, 2022, which determines innovation capacities and ecosystems at the sub-national level.

    India Innovation Index (III)

    • The release of the second edition of the index—the first was launched in October 2019—demonstrates the Government’s continued commitment to transforming the country into an innovation-driven economy.
    • The index attempts to create an extensive framework for the continual evaluation of the innovation environment of all states and UTs in India.
    • It intends to perform the following three functions-
    1. Ranking of states and UTs based on their index scores
    2. Recognizing opportunities and challenges, and
    3. Assisting in tailoring governmental policies to foster innovation
    • The states have been bifurcated into three categories: major states, northeast and hill states, and union territories/city-states/small states.

    Significance

    • The study examines the innovation ecosystem of Indian states and union territories.
    • The aim is to create a holistic tool that can be used by policymakers across the country to identify the challenges to be addressed and strengths to build on when designing policies.

    Highlights of the 2022 index

    • Karnataka has held this position, under the Major States category, in all three editions of the Index so far.
    • It was followed by Telangana, Haryana, Maharashtra and Tamil Nadu. Chhattisgarh, Odisha, Bihar and Gujarat were at the bottom of the index.
    • In the Index, Manipur secured the lead in the Northeast and Hill States category, while Chandigarh was the top performer in the Union Territories and City States category.

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • Researchers found gene regulating Nitrogen absorption in Plant

    Researchers led by those from the National Centre of Biological Sciences, Tata Institute of Fundamental Research, Bengaluru (NCBS-TIFR), have found a new pathway that regulates nitrate absorption in plants.

    Nitrogen in plant nutrition

    • Nitrogen is one of the most important macronutrients needed for development of a plant.
    • It is a part of chlorophyll, amino acids and nucleic acids, among others.
    • It is mostly sourced from the soil where it is mainly absorbed in the form of nitrates and ammonium by the roots.
    • Nitrates also play a role in controlling genome-wide gene expression that in turn regulates root system architecture, flowering time, leaf development, etc.
    • Thus, while a lot of action takes place in the roots to absorb and convert nitrogen into useful nitrates, the absorbed nitrates in turn regulate plant development apart from being useful as a macronutrient.

    What is MADS27?

    • The gene MADS27, which regulates nitrate absorption, root development and stress tolerance, is activated by the micro-RNA, miR444, therefore offers a way to control these properties of the plant.
    • The researchers studied this mechanism in both rice (monocot) and tobacco (dicot) plants.

    Regulatory switches

    • In addition to this route, several gene regulatory switches that regulate nitrate absorption and root development, such as the micro-RNA, miR444, are known in monocot plants, such as rice.
    • The micro-RNA ‘miR444’ is specific to monocots.
    • When this is not made, its target, MADS27, is produced in higher abundance, and it improves biosynthesis and transport of the hormone auxin, which is key for root development and its branching.
    • This regulatory miR444 switch is known to turn off at least five genes called MADS box transcription factor genes.
    • The speciality of the MADS box transcription factors is that they function like switch boxes of their own.
    • They bind to their favourite specific DNA sequences and they switch the neighbouring genes “on.”

    Why is the discovery important?

    • Presence of nitrates is important for the plant development and also for grain production.
    • However, the overuse of nitrates in fertilizers, for instance, can lead to the dumping of nitrates in the soil which leads to accumulation of nitrates in water and soil.
    • This accumulation adds to soil and water pollution and increased contribution to greenhouse gases.
    • Also, since the whole process of nitrate absorption takes place in the roots, a well-developed root system is needed for this to take place optimally.
    • At one level, it is known that the hormone auxin is responsible for well-developed roots across all plants.
    • A number of genes are known to help with auxin production, improved nitrate transport and assimilation in plants.

    Significance of MADS27

    • The MADS27 transcription factor has a three-pronged effect on the plant.
    • First, it regulates nitrate absorption by switching “on” proteins involved in this process.
    • Second, it leads to better development of the roots by regulating auxin hormone production and transport.
    • Finally, and somewhat surprisingly to the researchers, it helps in the abiotic stress tolerance by keeping the main stress player proteins “on.”

     

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • International Liquid Mirror Telescope (ILMT)

    The four-meter International Liquid Mirror Telescope (ILMT) saw the first light recently, gazing out from its vantage on Devasthal, a hill in Uttarakhand.

    What is the ILMT?

    • The telescope has been built by a collaboration of scientists from Canada, Belgium and India.
    • It is located at an altitude of 2,450 metres on the Devasthal Observatory campus of the Aryabhata Research Institute of Observational Sciences (ARIES) in Nainital district.
    • A large pool of mercury placed in a vessel is spun around so fast that it curves into a parabolic shape. Since mercury is reflective, this shape helps in focusing the reflected light.
    • Nearly 50 litres of mercury, weighing close to 700 kilograms, is spun hard to form a paraboloid mirror of just 4 mm thickness and a diameter of about 4 metres.
    • A thin sheet of mylar protects the mercury from the wind.
    • Once it starts making observations, the telescope will collect gigabytes of data, which will need to be analysed using artificial intelligence and machine learning (AI and ML) tools.

    It’s utility

    • The telescope will make sky surveys possible and obtain images that can help observe transient phenomena.
    • It will help analyse events such as supernovae and record the presence of space debris or meteorites — basically, watch the skies.

    What is the first image?

    • The first image made by the telescope consisted of several stars and a galaxy, NGC 4274, which is 45 million light years away.
    • The telescope, having a primary mirror that is liquid, cannot be turned and pointed in any direction.
    • It “stares” at the zenith and watches the sky as the earth rotates, thereby giving a view of different objects.
    • This property can be used to scan and survey the sky, and observe transients and moving objects such as meteorites.
    • It will work in tandem with the existing 3.6-metre Devasthal Optical Telescope.

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • RNA granules to treat neurodegenerative disorders

    Researchers at IISc Bangalore have identified a protein in yeast cells that dissolves RNA-protein complexes, also known as RNA granules.

    What is mRNA?

    • Messenger RNA (mRNA) is a single-stranded RNA (Ribo Nucleic Acid) molecule that is complementary to one of the DNA strands of a gene.
    • The mRNA is an RNA version of the gene that leaves the cell nucleus and moves to the cytoplasm where proteins are made.
    • During protein synthesis, an organelle called a ribosome moves along the mRNA, reads its base sequence, and uses the genetic code to translate each three-base triplet, or codon, into its corresponding amino acid.

    What are RNA granules?

    • Inside the cytoplasm of any cell there are structures made of messenger RNA (mRNA) and proteins known as RNA granules.
    • Unlike other structures in the cell (such as mitochondria), the RNA granules are not covered and confined by a membrane.
    • This makes them highly dynamic in nature, thereby allowing them to constantly exchange components with the surrounding.
    • RNA granules are present in the cytoplasm at low numbers under normal conditions but increase in number and size under stressful conditions including diseases.

    Why are they unique?

    • A defining feature which does not change from one organism to another (conserved) of the RNA granule protein components is the presence of stretches containing repeats of certain amino acids.
    • Such stretches are referred to as low complexity regions.
    • Repeats of arginine (R), glycine (G) and glycine (G) — known as RGG — are an example of low complexity sequence.

    Functions of RNA granules

    • Messenger RNAs are converted to proteins (building blocks of the cell) by the process of translation.
    • RNA granules determine messenger RNA (mRNA) fate by deciding when and how much protein would be produced from mRNA.
    • Protein synthesis is a multi-step and energy-expensive process.
    • Therefore, a common strategy used by cells when it encounters unfavorable conditions is to shut down protein production and conserve energy to deal with a stressful situation.
    • RNA granules help in the process of shutting down protein production.
    • Some RNA granule types (such as Processing bodies or P-bodies) not only regulate protein production but also accomplish degradation and elimination of the mRNAs, which in turn helps in reducing protein production.

    What is the recent study?

    • Researchers concluded that low complexity sequences which normally promote granule formation, in this case promote the disintegration of RNA granules in yeast cells.
    • They observed that the identified protein Sbp1 is specific for dissolving P-bodies and not stress granules which are related RNA granule type also present in the cytoplasm.

    Significance of the study

    • This study has highlighted the potential of amino acid repeats (RGG) as a therapeutic intervention.
    • The study may help analyze the effect of repeat sequences in genetically engineered mice that accumulate insoluble pathological aggregates in brain cells.
    • This could possibly help in treating neurodegenerative disorders such as Alzheimer’s disease.

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • ISRO’s goal for Venus Mission

    India’s Venus mission has been conceived. The project report for ‘Shukrayaan-I’ – the name given to ISRO’s Venus mission

    About Venus

    • Venus is the second planet from the Sun and is Earth’s closest planetary neighbor.
    • It’s one of the four inner, terrestrial (or rocky) planets, and it’s often called Earth’s twin because it’s similar in size and density.
    • Venus has a thick, toxic atmosphere filled with carbon dioxide and it’s perpetually shrouded in thick, yellowish clouds of sulphuric acid that trap heat, causing a runaway greenhouse effect.
    • It’s the hottest planet in our solar system, even though Mercury is closer to the Sun.
    • Surface temperatures on Venus are about 900 degrees Fahrenheit (475 degrees Celsius) – hot enough to melt lead.
    • Venus has crushing air pressure at its surface – more than 90 times that of Earth – similar to the pressure you’d encounter a mile below the ocean on Earth.

    Do you know?

    Venus rotates on its axis backward, compared to most of the other planets in the solar system. This means that, on Venus, the Sun rises in the west and sets in the east, opposite to what we experience on Earth. (It’s not the only planet in our solar system with such an oddball rotation – Uranus spins on its side.)

    What is Shukrayaan-I Mission?

    • Shukrayaan will be India’s first orbiter mission to Venus after sending similar missions to the Moon and Mars.
    • The mission aims to study the surface of the hottest planet in our solar system and unravel the mysteries under the Sulphuric Acid clouds enveloping it.
    • The orbiter is the third mission announced to the inferno world of Venus after NASA announced two probes followed by a spacecraft by the European Space Agency.
    • The probes will investigate the world looking for clues to understand the destructive past of Earth’s mysterious twin, which scientists believe once had vast reserves of water similar to our planet.

    Stated objectives

    • Investigation of the surface processes and shallow sub-surface stratigraphy, including active volcanic hotspots and lava flows
    • Studying the structure, composition, and dynamics of the atmosphere
    • Investigation of solar wind interaction with the Venusian Ionosphere

    Delay with the launch

    • The ISRO is eyeing the December 2024 window for launch with orbital maneuvers planned for the following year.
    • This is when earth and Venus would be so aligned that the spacecraft could be put in the neighboring planet’s orbit using a minimum amount of propellant.
    • The next similar window would be available in 2031.

     

    UPSC 2023 countdown has begun! Get your personal guidance plan now! (Click here)

  • Microbots for Drug Delivery

    An Indian researcher has found that it is possible to use light as a fuel to move microbots in real-body conditions with intelligent drug delivery that is selectively sensitive to cancer cells

    Microswimmers for drug delivery

    • Made from the two-dimensional compound poly (heptazine imide) carbon nitride (aka PHI carbon nitride), these microbots are nothing like the miniaturised humans.
    • They range from 1-10 micrometre (a micrometre is one-millionth of a metre) in size, and can self-propel when energised by shining light.
    • While carbon nitride is an excellent photo-catalyst, the two-dimensional PHI has a sponge-like structure full of pores and voids and charge storage properties.
    • The researchers found that the ions in the salty solution passed through the pores of PHI carbon nitride.
    • Thus, there was little or no resistance from the salt ions.

    How do they swim across the blood?

    • The PHI carbon nitride microparticles are photocatalytic.
    • Like in a solar cell, the incident light is converted into electrons and holes.
    • These charges drive reactions in the surrounding liquid. The charges react with the fluid surrounding them.
    • This reaction, combined with the particle’s electric field, makes the microbots (micro-swimmers) swim.
    • As long as there is light, electrons and holes are produced on the surface of the swimmers, which in turn react to form ions and an electric field around the swimmer.
    • These ions move around the particle and cause fluid to flow around the particle.
    • So this fluid flow causes the micro-swimmers to move.

    How does the ion movement occur?

    • The ions move from the bright surface of the micro-swimmer to the rear end.
    • The diffusion of the swimming medium in one direction propels the micro-swimmer in the opposite direction.
    • This is like a boat moving in the direction opposite to the oar strokes.
    • The particles are nearly spherical, and the incident light illuminates one-half of the sphere, leaving the other dark.
    • As photocatalysis is light-driven, it occurs only on the brightened hemisphere.
    • As the ions move from the bright side to the dark side, micro-swimmers march in the direction of the light source.

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)