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Type: Prelims Only

  • [pib] Kakrapar Atomic Power Project (KAPP-3) in Gujarat

    The indigenously designed 700 MWe reactor at the Kakrapar Atomic Power Project has achieved Criticality.

    Try this PYQ from CSP 2013:

    Q. The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

    (a) Gravity is the strongest of the four

    (b) Electromagnetism act only on particles with an electric charge

    (c) Weak nuclear force causes radioactivity

    (d) Strong nuclear force holds protons and neutrons inside the nuclear of an atom.

    What is ‘Criticality’ in Atomic/Nuclear Power Plants?

    • Reactors are the heart of an atomic power plant, where a controlled nuclear fission reaction takes place that produces heat, which is used to generate steam that then spins a turbine to create electricity.
    • Fission is a process in which the nucleus of an atom splits into two or smaller nuclei, and usually some by-product particles.
    • When the nucleus splits, the kinetic energy of the fission fragments is transferred to other atoms in the fuel as heat energy, which is eventually used to produce steam to drive the turbines.
    • For every fission event, if at least one of the emitted neutrons on average causes fission, a self-sustaining chain reaction will take place.
    • A nuclear reactor achieves criticality when each fission event releases a sufficient number of neutrons to sustain an ongoing series of reactions.

    Controlling Criticality

    • When a reactor is starting up, the number of neutrons is increased slowly in a controlled manner. Neutron-absorbing control rods in the reactor core are used to calibrate neutron production.
    • The control rods are made from neutron-absorbing elements such as cadmium, boron, or hafnium.
    • The deeper the rods are lowered into the reactor core, the more neutrons the rods absorb and the less fission occurs.
    • Technicians pull up or lower down the control rods into the reactor core depending on whether more or less fission, neutron production, and power are desired.
    • If a malfunction occurs, technicians can remotely plunge control rods into the reactor core to quickly soak up neutrons and shut down the nuclear reaction.

    Why is this achievement significant?

    • It is the biggest indigenously developed variant of the Pressurized Heavy Water Reactor (PHWR).
    • The PHWRs, which use natural uranium as fuel and heavy water as moderator, is the mainstay of India’s nuclear reactor fleet.
    • Until now, the biggest reactor size of the indigenous design was the 540 MWe PHWR, two of which have been deployed in Tarapur, Maharashtra.
    • India works to ramp up its existing nuclear power capacity of 6,780 MWe to 22,480 MWe by 2031.
    • The 700MWe capacity constitutes the biggest component of the expansion plan.

    Back2Basics: India’s PHWR technology

    • PHWR technology started in India in the late 1960s with the construction of the first 220 MWe reactor, Rajasthan Atomic Power Station, RAPS-1 under the joint Indo-Canadian nuclear co-operation.
    • Canada supplied all the main equipment for this first unit, while India retained responsibility for construction, installation, and commissioning.
    • For the second unit (RAPS-2), import content was reduced considerably, and indigenization was undertaken for major equipment.
    • Following the withdrawal of Canadian support in 1974 after Pokhran-1, Indian nuclear engineers completed the construction, and the plant was made operational with a majority of components being made in India.

  • In news: Madhubani/Mithila Paintings

    An artist known as the ‘mask man’ of Bihar dispatches masks with hand-painted Madhubani motifs all over India.

    Also read:

    [Prelims Spotlight] Indian Paintings and Handicrafts

    Madhubani Paintings

    • Madhubani art (or Mithila painting) is a style of Indian painting, practised in the Mithila region of Bihar.
    • This painting is done with a variety of tools, including fingers, twigs, brushes, nib-pens, and matchsticks and using natural dyes and pigments.
    • It is characterized by its eye-catching geometrical patterns.
    • It was traditionally created by the women of various communities in the Mithila region of the Indian subcontinent.
    • This painting as a form of wall art was practised widely throughout the region; the more recent development of painting on paper and canvas mainly originated among the villages around Madhubani.
    • It is these latter developments that led to the term “Madhubani art” being used alongside “Mithila Painting.”

    Its features

    • It uses two-dimensional imagery, and the colours used are derived from plants. Ochre, Lampblack and Red are used for reddish-brown and black, respectively.
    • It mostly depicts people and their association with nature and scenes and deities from the ancient epics.
    • Natural objects like the sun, the moon, and religious plants like tulsi are also widely painted, along with scenes from the royal court and social events like weddings.
    • Generally, no space is left empty; the gaps are filled by paintings of flowers, animals, birds, and even geometric designs.
    • Madhubani art has five distinctive styles: Bharni, Kachni, Tantrik, Godna and Kohbar.
    • This painting has also received a GI (Geographical Indication) status.

  • Lonar Lake turned pink due to ‘Haloarchaea’ microbes

    The colour of Lonar lake water in Maharashtra’s Buldhana district turned pink due to a large presence of the salt-loving ‘Haloarchaea’ microbes, a probe carried out by a Pune-based institute has concluded.

    Make a note of all saltwater lakes in India. Few of them are Pulicat, Pangong Tso, Chilika, and Sambhar Lakes etc.

    Haloarchaea’ microbes

    • Haloarchaea or halophilic archaea is a bacteria culture which produces pink pigment and is found in water saturated with salt.
    • The increased salinity and pH facilitated the growth of halophilic microbes, mainly Haloarchaea.
    • Basically, it is the biomass of these microbes and because of that, the surface of the water turned red or pink and as soon as the biomass subsided, the colour disappeared.
    • The scientist said the colour of the lake is now returning to original as the rainy season has kicked in, allowing dilution of the water.
    • Initially, it was thought for the red-pigmented Dunaliella algae due to which the water might have turned pink.
    • Because of that, the salinity and pH/alkalinity levels have also come down and green algae have started growing in the water body.

    About Lonar Lake

    • Lonar Lake, also known as Lonar crater, is a notified National Geo-heritage Monument, saline (pH of 10.5), Soda Lake, located at Lonar in Buldhana district, Maharashtra.
    • It was created by an asteroid collision with earth impact during the Pleistocene Epoch.
    • It is one of the four known, hyper-velocity, impact craters in basaltic rock anywhere on Earth.
    • It sits inside the Deccan Plateau—a massive plain of volcanic basalt rock created by eruptions some 65 million years ago.
    • Its location in this basalt field suggested to some geologists that it was a volcanic crater.

  • BlackRock Android Malware

    Various security firms have alerted about new malware, called BlackRock.

    Try this question from CSP 2018:

    Q.The terms ‘WannaCry, Petya, Eternal Blue’ sometimes mentioned news recently are related to

    (a) Exoplanets

    (b) Cryptocurrency

    (c) Cyberattacks

    (d) Mini satellites

    BlackRock

    • BlackRock isn’t exactly a new malware. In fact, it is based on the leaked source code of the Xeres malware, itself derived from a malware called LokiBot.
    • The only big difference between BlackRock and other Android banking trojans is that it can target more apps than previous malwares.

    How does it work?

    • BlackRock works like most Android malware. Once installed on a phone, it monitors the targeted app.
    • When the user enters the login and/or credit card details, the malware sends the information to a server.
    • BlackRock uses the phone’s Accessibility feature and then uses an Android DPC (device policy controller) to provide access to other permissions.
    • It can be used to send and steal SMS messages, hide notifications, keylogging, AV detection, and much more.

    Threats posed

    • The new malware can steal information like passwords and credit card information from about 377 smartphone applications, including Amazon, Facebook, and Gmail.
    • It is so powerful that it makes antivirus applications useless.

  • [pib] Asteroid 2020 ND

    NASA has issued a warning that a huge “Asteroid 2020 ND” will move past Earth on July 24.

    Try this question from CSP 2014:

    Q.What is a coma, in the content of astronomy?

    (a) Bright half of material on the comet

    (b) Long tail of dust

    (c) Two asteroids orbiting each other

    (d) Two planets orbiting each other

    What are Asteroids?

    • Asteroids are small, rocky objects that orbit the Sun. They are leftover from the formation of our solar system.
    • Although asteroids orbit the Sun like planets, they are much smaller than planets.
    • There are lots of asteroids in our solar system. Most of them live in the main asteroid belt—a region between the orbits of Mars and Jupiter.
    • Some asteroids go in front of and behind Jupiter. They are called Trojans.
    • Asteroids that come close to Earth are called Near-Earth Objects, NEOs for short. NASA keeps a close watch on these asteroids.

    Asteroid 2020 ND

    • The 2020 ND is about 170 metres-long.
    • It will be as close as 0.034 astronomical units (5,086,328 kilometres) to our planet and is travelling at a speed of 48,000 kilometres per hour.
    • Its distance from Earth has placed it in the “Potentially Hazardous Asteroids (PHAs)” category.

    How are PHAs defined?

    • PHAs are currently defined based on parameters that measure the asteroid’s potential to make threatening close approaches to the Earth.
    • NASA classifies objects like these as ‘near-Earth objects’ (NEOs) as they get nudged by other planets’ gravitational attraction resulting in their proximity to our solar system.
    • It is not necessary that asteroids classified as PHAs will impact the Earth. It only means there is a possibility for such a threat.

    Can they be deflected?

    • Over the years, scientists have suggested different ways to ward off such threats, such as blowing up the asteroid before it reaches Earth or deflecting it off its Earth-bound course by hitting it with a spacecraft.
    • The most drastic measure undertaken so far is the Asteroid Impact and Deflection Assessment (AIDA), which includes NASA’s Double Asteroid Redirection Test (DART) mission and the ESA’s Hera.
    • Both mission’s target is Didymos, a binary near-Earth asteroid, one of whose bodies is of the size that could pose the most likely significant threat to Earth.
    • In 2018, NASA announced that it had started the construction of DART, which is scheduled to launch in 2021 with an aim to slam into the smaller asteroid of the Didymos system at around 6 km per second in 2022.
    • Hera, which is scheduled to launch in 2024, will arrive at the Didymos system in 2027 to measure the impact crater produced by the DART collision and study the change in the asteroid’s orbital trajectory.

    Back2Basics: Near-Earth objects (NEOs)

    • NEOs are comets and asteroids nudged by the gravitational attraction of nearby planets into orbits which allows them to enter the Earth’s neighbourhood.
    • These objects are composed mostly of water ice with embedded dust particles, and occasionally approach close to the Earth as they orbit the Sun.
    • NASA’s Center for Near-Earth Object Study (CNEOS) determines the times and distances of these objects as and when their approach to the Earth is close.

  • What is Itolizumab, newly cleared for Covid?

    The Drug Controller General of India recently approved Itolizumab as a novel biologic therapy for restricted emergency use.

    Various drugs in news these days are:

    1) Remdesivir: Ebola

    2) Lopinavir: HIV

    3) Hydroxychloroquine: Malaria

    What is Itolizumab?

    • Itolizumab is an existing drug used for psoriasis, a chronic skin disease involving unregulated growth of some skin cells that develop into red patches mostly on knees and elbows, but also on some other parts of the body.
    • The drug, developed by Bengaluru-based Biocon, was approved in 2013.
    • It is a monoclonal antibody which is used to treat acute psoriasis.

    Why it is being used for COVD-19?

    • The coronavirus has been observed to induce an overreaction of the immune system, generating a large number of cytokines that can cause severe damage to the lungs and other organs.
    • Itolizumab is safe and efficient in preventing cardio-renal complications in Covid-19 patients who also have acute respiratory distress.

    What are monoclonal antibodies?

    • Monoclonal antibodies are proteins cloned in the lab to mimic antibodies produced by the immune system to counter infection.
    • They have their genesis in serum, the colourless constituent of blood that contains antibodies.
    • These proteins bind to an antigen, the fragment of an infectious virus in the case of SARS-CoV-2, and either destroy it or block its action.

  • Vitamin D and its health benefits

    There have been considerable discussions in scientific circles on the importance of vitamin D in these days of the COVID-19 pandemic.

    Try this question from CSP 2017:

    Q.Regular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health and promote longevity?

    (a) They activate the enzymes necessary for vitamin synthesis in the body and help prevent vitamin deficiency.

    (b) They prevent excessive oxidation of carbohydrates, fats and proteins in the body and help avoid unnecessary wastage of energy.

    (c) They neutralize the free radicals produced in the body during metabolism.

    (d) They activate certain genes in the cells of the body and help delay the ageing process.

    Vitamin D and its prevalence

    • It is produced when sunlight (or artificial light, particularly in the ultraviolet region of 190-400 nm wavelength) falls on the skin.
    • Light triggers a chemical reaction to a cholesterol-based molecule and converts it into calcidiol in the liver and into calcitriol in the kidney.
    • It is these two molecules that are physiologically active.
    • Since sunlight is important for the generation of vitamin D, tropical countries have an advantage over the northern countries.
    • India, being a tropical country, one would expect naturally derived vitamin D levels to be good.

    Why Vitamin D is important?

    • Vitamin D deficiency can affect COVID-19 high-risk patients, particularly those who are diabetic, have heart conditions, pneumonia, obesity and those who smoke.
    • It is also associated with infections in the respiratory tract and lung injury.
    • Besides, vitamin D is known to help in having the right amount of calcium in the bones, catalyse the process of protecting cell membranes from damage, preventing the inflammation of tissues.
    • Moreover, it helps stop tissues from forming fibres and weakening bones from becoming brittle, leading to osteoporosis.

  • Kaziranga National Park and Tiger Reserve

    As a fresh wave of floods ravages Assam, killing, 85 per cent of the Kaziranga National Park and Tiger Reserve (KNPTR) remains submerged.

    Try this question from CSP 2019:

    Q.Consider the following statements:

    1. Asiatic lion is naturally found in India only.
    2. Double-humped camel is naturally found in India only.
    3. One-horned rhinoceros is naturally found in India only.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

    Kaziranga National Park and Tiger Reserve

    • The KNTPR is a national park in the Golaghat, Karbi Anglong and Nagaon districts of the state of Assam.
    • The sanctuary, which hosts two-thirds of the world’s great one-horned rhinoceroses, is a World Heritage Site.
    • Kaziranga is home to the highest density of tigers among protected areas in the world and was declared a Tiger Reserve in 2006 (now the highest tiger density is in Orang National Park, Assam).
    • The park is home to large breeding populations of elephants, wild water buffalo, and swamp deer.
    • It is also recognized as an Important Bird Area by BirdLife International for the conservation of avifaunal species.

    Significance of floods in Kaziranga’s ecosystem

    • The entire area of Kaziranga — formed by alluvial deposits from the Brahmaputra and its tributaries — is centred on the river.
    • There is a consensus that floods are necessary for Kaziranga by virtue of it being riverine ecosystem.
    • The regenerative nature of floods helps replenish Kaziranga’s water bodies and maintain its landscape, a mix of wetlands, grasslands and semi-evergreen deciduous forests.
    • The floodwaters also function as a breeding ground for fish.
    • The same fish are carried away by the receding waters into the Brahmaputra — in a way, the park replenishes the river’s stock of fish too.
    • The waters also help get rid of unwanted plants such as water hyacinth which collect in huge masses in the landscape.

  • Hope:  UAE’s first mission to Mars

    The launch of the United Arab Emirates’ (UAE) first mission to Mars has been delayed by two days due to bad weather conditions which were scheduled to take off from its launch site, Tanegashima Space Center, in Japan.

    Try this question from CSP 2014:

    Q.Which of the following pair is/are correctly matched?

    Spacecraft Purpose
    1. Cassini-Huygens Orbiting the Venus and transmitting data to the Earth
    2. Messenger Mapping and investigating the Mercury
    3. Voyager 1 and 2 Exploring the outer solar system

    Select the correct answer using the code given below.

    a) 1 only

    b) 2 and 3 only

    c) 1 and 3 only

    d) 1, 2 and 3

    Hope Mission

    • The Emirates Mars Mission called “Hope” was announced in 2015 with the aim of creating mankind’s first integrated model of the Red planet’s atmosphere.
    • Hope weighs over 1500 kg and will carry scientific instruments mounted on one side of the spacecraft, including the Emirates exploration Imager (EXI), which is a high-resolution camera among others.
    • The spacecraft will orbit Mars to study the Martian atmosphere and its interaction with outer space and solar winds.
    • Hope will collect data on Martian climate dynamics, which should help scientists understand why Mars’ atmosphere is decaying into space.

    Objectives of the mission

    • Once it launches, Hope will orbit Mars for around 200 days, after which it will enter the Red planet’s orbit by 2021, coinciding with the 50th anniversary of the founding of UAE.
    • The mission is being executed by the Mohammed bin Rashid Space Centre, UAE’s space agency.
    • It will help answer key questions about the global Martian atmosphere and the loss of hydrogen and oxygen gases into space over the span of one Martian year.

    Back2Basics: Mars Orbiter Mission (MOM)

    • The MOM also called Mangalyaan is a space probe orbiting Mars since 24 September 2014. It was launched on 5 November 2013 by the Indian Space Research Organisation (ISRO).
    • It aims at studying the Martian surface and mineral composition as well as scans its atmosphere for methane (an indicator of life on Mars).
    • It is India’s first interplanetary mission and it made it the fourth space agency to reach Mars, after Roscosmos, NASA, and the European Space Agency.
    • It made India the first Asian nation to reach Martian orbit and the first nation in the world to do so on its maiden attempt.
    • It was initially meant to last six months, but subsequently, ISRO had said it had enough fuel for it to last “many years.”

  • Mapping: Melghat Tiger Reserve

    Maharashtra CM has sought alternative routes for the proposed broad gauge conversion of a railway line passing through the Melghat Tiger Reserve in Amravati district.

    Try this question from CSP 2012:

    Consider the following protected areas:

    1. Bandipur 2. Bhitarkanika 3. Manas 4. Sunderbans

    Which of the above are declared Tiger Reserves?

    (a) 1 and 2 only

    (b) 1, 3 and 4 only

    (c) 2, 3 and 4 only

    (d) 1, 2, 3 and 4

    Melghat Tiger Reserve

    • Melghat, part of the Satpura-Maikal landscape was among the first nine tiger reserves notified in 1973-74 under the Project Tiger.
    • The Tapti River and the Gawilgadh ridge of the Satpura Range form the boundary of the reserve.
    • The forest is tropical dry deciduous in nature, dominated by teak.
    • The reserve is a catchment area for five major rivers: the Khandu, Khapra, Sipna, Gadga and Dolar. These all rivers are tributaries of the river Tapti.

    Back2Basics: Project Tiger

    • Project Tiger is a tiger conservation programme launched in April 1973 during PM Indira Gandhi’s tenure.
    • In 1970 India had only 1800 tigers and Project Tiger was launched in Jim Corbett National Park.
    • The project is administrated by the National Tiger Conservation Authority (NTCA).
    • It aims at ensuring a viable population of Bengal tigers in their natural habitats, protecting them from extinction etc.
    • Under this project the govt. has set up a Tiger Protection Force to combat poachers and funded relocation of villagers to minimize human-tiger conflicts.