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Subject: Science and Technology

  • Somatic Genetic Variants: A genomic revolution hiding inside our cells

    somatic gene

    Central Idea

    • The human genome, comprising 23 pairs of chromosomes, is the blueprint of our genetic makeup inherited from our parents.
    • The replication of this genetic information in nearly a trillion cells during development results in a complex mosaic of cellular diversity.
    • Despite remarkable DNA replication accuracy, mutations still occur.

    What are Somatic Genes?

    • Somatic genetic variants, also known as somatic mutations or somatic alterations, are genetic changes that occur in the cells of an organism’s body (somatic cells) during its lifetime.
    • These mutations are distinct from germline mutations, which are inherited from parents and are present in every cell of an individual’s body.
    • Somatic mutations are acquired after conception and are not passed on to future generations.
    • Somatic mutations can occur due to various factors, such as exposure to environmental mutagens (like radiation or chemicals), errors in DNA replication, and other cellular processes.
    • These mutations can affect the DNA sequence of specific genes, leading to changes in protein production or function.

    DNA Replication: The Copy-Paste Mechanism

    • Genetic Inheritance: Ovum and sperm carry parental genetic blueprints, which combine after fertilization.
    • Cell Division: The single fertilized cell, with 23 chromosomes, multiplies to form the human body’s trillions of cells.
    • DNA Replication Accuracy: Proteins proofread and correct DNA during replication, resulting in an error rate of 0.64-0.78 mutations per billion base pairs per division.

    Impact of Somatic Genetic Mutations

    • Dependent on Timing: Errors occurring after birth but during development are somatic genetic mutations.
    • Driver Mutations: Mutations that confer a fitness advantage to cells can lead to tumor formation and are called driver mutations.
    • Cellular Mosaic: Human body is a mosaic of cells with subtle genomic differences, influenced by somatic genetic variants.
    • Genetic Variants: Genetic variants within functional genome regions can affect protein encoding and regulation.

    Somatic Variants and Physiological Processes

    • Immune Cell Diversity: Immune cells undergo extensive somatic changes to create diverse antibodies recognise pathogens.
    • Recent Knowledge Explosion: Technological advancements in sequencing individual cells have led to an explosion of data and knowledge on somatic variants.
    • Cancer’s Role: Somatic genetic variants play a significant role in cancer development, aiding in early detection, diagnosis, and prognosis.

    Cancer Mutational Signatures

    • Mutational Signatures: Specific genetic variations and patterns are characteristic of certain cancers, enabling early detection.
    • Blood-Based Detection: Technologies identify tumour DNA in blood to detect cancer early.
    • Disease Progress Tracking: Cancer variations can be used to monitor disease progression and therapy response.

    Somatic Variants in Genetic Diseases

    • Genetic Diseases Origin: Many genetic disorders arise from somatic genetic variants, not inherited from parents.
    • Disease Severity and Timing: The severity and distribution of genetic diseases depend on the timing of somatic mutations during development.
    • Immune Disorders: Somatic changes can cause immune disorders and even beneficially reverse some genetic diseases.

    SMaHT Network: Understanding Somatic Mosaicism

    • Somatic Mosaicism: US has launched the ‘Somatic Mosaicism across Human Tissues’ (SMaHT) Network.
    • Aims: SMaHT aims to discover somatic variants, develop tools for study, and improve analysis for biological and clinical insights.
    • Investment and Research: The U.S. government has invested $140 million to study somatic variants in post-mortem samples.

    Implications and Future Prospects

    • Cellular Complexity: Studying somatic variants reveals the intricate diversity of cells and reshapes evolutionary understanding.
    • Disease Management: Understanding somatic genetic changes can advance disease understanding and management.
    • Innovative Approaches: Analyzing genes at the single-cell level paves the way for innovative disease approaches and insights into evolution.

  • Unraveling the Lunar Landscape: Near, Far, and Dark Sides

    far dark side lunar moon

    Central Idea

    • The Chandrayaan-3 mission’s recent lunar landing has sparked curiosity about the moon’s various sides – near, far, and even the intriguing ‘dark’ side.
    • Delving into these distinctions sheds light on the moon’s enigmatic nature and how space exploration helps us unravel its mysteries.

    Facts for Prelims

    Impact/Landing point names on Moon:

    1. Chandrayaan 1: Jawahar Point

    2. Chandrayaan 2: Tiranga Point

    3. Chandrayaan 3: Shivshakti Point

     Moon’s Visible and Hidden Faces

    • Near and Far Sides: The moon’s ‘near side,’ visible from Earth, covers around 60% of its surface. In contrast, the ‘far side’ remained hidden from us until modern spacecraft brought it into view.
    • Clarifying the ‘Dark’ Side: Often misconstrued as constantly dark, the ‘dark side’ simply refers to the unseen side. It gets illuminated during the ‘new moon’ phase, challenging the misconception of its perpetual darkness.

    Why is their composition different?

    • The composition of the Moon’s near and far sides is different, and scientists believe they have identified the reasons behind this discrepancy.
    • A study published in the journal Nature Geoscience reveals that the presence of KREEP, a rock enriched in potassium (K), rare-earth elements (REE), and phosphorus (P), plays a crucial role.

    Key Points from the Study:

    • Moons Near and Far Sides: The Moon’s near side, always facing Earth, has visible dark and light patches known as “maria.” Telescopic observations showed that these were not seas as early astronomers thought, but rather craters or volcanic features. The far side of the Moon has fewer maria than the near side.
    • Moon’s Formation: The uneven distribution of volcanism and the KREEP signature between the near and far sides of the Moon puzzled scientists.
    • Radioactive Unstable Elements: Potassium (K), thorium (Th), and uranium (U) are unstable, radioactive elements that have various isotopes with different numbers of neutrons. The radioactive decay of these elements generates heat that can melt rocks and contribute to volcanic activity.
    • Heat and Melting: The study found that the inclusion of KREEP in rocks not only enhances heating but also lowers their melting temperature. This combination increases volcanic activity beyond what is predicted by radiogenic decay models.
    • Geological Record: The Moon’s surface preserves geological events from the early history of the Solar System due to the absence of erosion processes. Concentrations of radioactive elements like uranium (U) and thorium (Th) on the near side provide insights into the Moon’s formation and early Earth conditions.

    Phases and Illumination

    • New Moon Phase: The ‘new moon’ phase unveils the moon’s ‘far side,’ exposing it to sunlight for about two weeks.
    • Historic Revelation: In 1968, astronauts aboard Apollo 8 became the first humans to observe the ‘far side,’ demystifying its hidden features.

    Chandrayaan-3’s Approach

    • Closest South Pole Landing: Chandrayaan-3’s landing at coordinates 69.36 S and 32.34 E marks the closest approach to the lunar South Pole.
    • Exploring Permanently Shadowed Regions: The strategic landing aimed to study regions that never receive sunlight, potentially containing frozen water ice and other lunar resources.
    • Sunlight Necessity: Vikram’s nearness to the South Pole ensures sunlight for solar battery recharging, crucial for its operation.
    • Choice of Landing Site: The decision to land on the ‘near side’ was driven by mission objectives, including real-time communication with Earth. Landing on the ‘far side’ would have required relay satellites and introduced delays.

  • Indian start-up joins Sodium Ion Battery Innovation

    sodium ion battery

    Central Idea

    • Coimbatore-based start-up AR4 Tech has joined hands with Singapore’s Sodion Energy to revolutionize the energy storage landscape by producing sodium-ion battery packs for both local and global markets.
    • These sodium-ion batteries will find applications in converting conventional petroleum-based vehicles, primarily two-wheelers, into electric vehicles.

    What is Sodium Ion Battery (NIB)?

    • A NIB is a type of rechargeable battery that uses sodium ions as the charge carriers to store and release electrical energy.
    • Similar in principle to lithium-ion batteries, sodium-ion batteries offer an alternative energy storage solution with potential benefits such as cost-effectiveness and abundance of sodium resources.

    Key characteristics  

    • Working Principle: Sodium-ion batteries operate on the same basic principle as lithium-ion batteries. During charging, sodium ions are moved from the positive electrode (cathode) to the negative electrode (anode), and during discharge, they move back to the cathode, generating electrical energy in the process.
    • Sodium Anode: In a sodium-ion battery, the anode typically consists of materials that can intercalate (absorb) sodium ions during charging. Graphite and other carbon-based materials are commonly used for the anode in sodium-ion batteries.
    • Cathode Materials: Various materials can be used as cathodes in sodium-ion batteries, such as transition metal oxides or polyanionic compounds. These cathode materials allow sodium ions to be stored and released, enabling the battery’s energy storage function.
    • Electrolyte: The electrolyte in a sodium-ion battery is responsible for facilitating the movement of sodium ions between the anode and cathode during charge and discharge cycles. Sodium-ion batteries typically use a solid electrolyte or a liquid electrolyte containing sodium salts.

    Advantages offered

    • Abundance of Resources: Sodium is more abundant and widely available than lithium, which can potentially make sodium-ion batteries more cost-effective.
    • Environmental Impact: They may have a lower environmental impact compared to lithium-ion batteries due to the more widespread availability of sodium resources.

    Challenges

    • Energy Density: Sodium-ion batteries generally have lower energy density compared to lithium-ion batteries, which can limit their use in applications requiring high energy storage capacity.
    • Cycle Life: Ensuring a long cycle life (the number of charge and discharge cycles a battery can go through before losing capacity) remains a challenge for sodium-ion batteries.

  • K Kasturirangan explains: Chandrayaan-3 and India’s Evolving Space Ambitions

    Central Idea

    • The successful Chandrayaan-3 mission not only marks a significant achievement for India’s space program but also signifies the nation’s attainment of a pivotal capability: direct physical access to another celestial body.
    • This accomplishment propels India into an elite group of spacefaring nations and affords participation in shaping future planetary exploration endeavors and resource extraction from space.

    Who is Dr. K. Kasturirangan?

    • Dr. K. Kasturirangan is a prominent Indian space scientist and engineer.
    • He led ISRO as Chairman from 1994 to 2003, overseeing achievements like PSLV launches and Chandrayaan-1.
    • Chandrayaan-1, under his leadership, discovered water molecules on the Moon.
    • He’s been active in promoting science education and enhancing research quality.
    • Dr. Kasturirangan chaired the committee behind India’s NEP 2020, focusing on holistic education.
    • His accolades include Padma Shri and Padma Bhushan awards.
    • He’s been involved in international collaborations and represented India globally.
    • Besides leadership, he’s made academic contributions in space and atmospheric sciences.
    • His influence spans various positions in scientific and academic institutions.

    India’s Integration into Planetary Exploration and Decision-Making

    • Access to Celestial Bodies: Chandrayaan-3 provides India with a tangible gateway to planetary bodies, elevating its status in space exploration.
    • Frontiers of Technology: India’s pioneering capabilities place it at the forefront of space technology, enabling participation in shaping future planetary explorations and resource extraction policies.
    • A Seat at the Table: India’s involvement in this realm positions it naturally within the club of nations that influence and formulate space-related policies, ending a history of exclusion.

    Now, India’s stature in Global Space Dynamics

    • Historical Context: India’s past exclusion from technological clubs has driven its pursuit of self-reliance and global influence, transforming from a dependent to a self-sufficient nation.
    • Space Diplomacy: Space capabilities will play a pivotal role in shaping global equations in the 21st century, and India’s active participation will bolster its international standing.
    • Equitable Contributions: Chandrayaan-3 bolsters India’s potential to play a decisive role in space-related international decision-making, strengthening its voice on equal terms.

    Chandrayaan-3’s Significance for ISRO

    • Planetary Exploration Strategy: Chandrayaan-3 showcases ISRO’s comprehensive planetary exploration capabilities, encompassing satellite deployment, lunar orbits, surface study, and landing.
    • Direct Lunar Access: The mission grants India direct physical access to the Moon, offering new avenues for lunar exploration and resource utilization.
    • Kasturirangan’s Vision: The vision of Dr. K. Kasturirangan, former ISRO chairman, harmonizes with Sarabhai’s principles, building upon a foundation of technological self-sufficiency.
    • Progressive Continuation: ISRO’s pursuits of planetary exploration and Chandrayaan missions align with the trajectory Kasturirangan initiated, enhancing the nation’s profile on the global stage.

    Completing the Transformation: From Development to Exploration

    • Sequential Alignment: ISRO’s evolution from developmental needs to commercial launches and now to scientific and planetary exploration reflects its responsiveness to India’s evolving requirements.
    • Government Support: ISRO’s consistent success has been underpinned by unwavering government backing, which has enabled the organization to expand its horizons.
    • Strategic Role: Space technology’s growing influence necessitates robust capabilities, and ISRO’s achievements foster meaningful international partnerships, enhancing India’s global prestige.

    Conclusion

    • Chandrayaan-3 is more than a singular event; it signifies India’s ascendancy as a formidable force in space exploration.
    • As the nation transitions from a developing to a developed status, its capabilities to explore, innovate, and collaborate extend far beyond Earth’s boundaries.
    • Chandrayaan-3’s impact extends beyond the Moon’s surface, fostering diplomatic connections, winning allies, and amplifying India’s influence on the global stage under the visionary guidance of Dr. K. Kasturirangan.

  • Chandrayaan-3’s Success: Future Objectives

    Chandrayaan

    Central Idea

    • As Chandrayaan-3 succeeded on its lunar soft landing, its six-wheeled rover begins a journey to unravel the mysteries of the Moon.
    • With its payloads and instruments, the mission aims to build on the knowledge gained from its predecessors, investigating lunar quakes, mineral compositions, and water-ice presence.

    Chandrayaan-3 Mission: Journey post soft landing

    • Rover’s Arrival: The 26-kg rover, launched from the Chandrayaan-3 lander, is poised to cover up to 500 meters, commencing its lunar exploration.
    • Duration: The lander and rover, equipped with six payloads, are primed to collect valuable data during the single lunar day (equivalent to 14 Earth days) of operation.
    • Studying Lunar Quakes: The Chandrayaan-3 mission seeks to deepen insights into lunar quakes, expanding on the knowledge gained from its predecessors.
    • Mineral Composition: The rover’s endeavors include examining the mineral compositions of the Moon’s surface, shedding light on its geological history.
    • Electrons and Ions Study: The Radio Anatomy of Moon Bound Hypersensitive ionosphere and Atmosphere (RAMBHA) payload aims to study the behavior of electrons and ions near the lunar surface over time.
    • Thermal Properties: Chandra’s Surface Thermo physical Experiment (ChaSTE) will explore the thermal characteristics of the Moon’s Polar Regions.
    • Lunar Seismic Activity: The Instrument for Lunar Seismic Activity (ILSA) endeavors to measure lunar quakes and study the Moon’s crust and mantle composition.
    • Laser Retroreflector Array: A passive experiment by NASA, the LASER Retroreflector Array (LRA), will serve as a target for precise laser measurements in future missions.
    • Chemical Insights: The LASER Induced Breakdown Spectroscope (LIBS) aboard the rover is designed to identify the chemical and mineral composition of the lunar surface.
    • Elemental Analysis: The Alpha Particle X-ray Spectrometer (APXS) aims to analyze elements such as magnesium, aluminium, silicon, potassium, calcium, titanium, and iron in lunar soil and rocks.
    • Mineral Mapping: The CLASS X-ray Fluorescence experiment, covering nearly 95% of the lunar surface, offers detailed mineral mapping. Oxygen-rich minerals hold potential for future missions as fuel resources.

    Earlier Chandrayaan: Pioneering discoveries

    • Water Unveiled: Chandrayaan-1 played a pivotal role in uncovering the presence of water and hydroxyl molecules in the Moon’s atmosphere and surface, particularly in its southern polar regions.
    • Subsurface Water-Ice: Payloads like mini-SAR and Moon Mineralogy Mapper (M3) detected subsurface water-ice deposits within craters near the lunar South Pole.
    • Lava Tubes for Habitability: Terrain mapping on Chandrayaan-1 unveiled buried lava tubes that could provide protective habitats for humans, shielding against radiation and extreme lunar conditions.
    • Magma Ocean Hypothesis: M3 payload data suggested the possibility of a past magma ocean on the Moon, pointing to its formation and evolution.
    • Active Moon: Contrary to previous notions of lunar inactivity, Chandrayaan-1 revealed dynamic lunar processes, including volcanic activity evidenced by lava channels and vents less than 100 million years old.
    • Surface-Exosphere Interaction: Measurements indicated that the lunar surface interacts with the exosphere, evident in the emission of carbon dioxide and other gases.
    • Solar Mysteries: The Solar X-Ray Monitor on Chandrayaan-2’s orbiter observed solar microflares outside active regions, providing insights into coronal heating mysteries.

    Conclusion

    • Chandrayaan-3’s scientific journey exemplifies India’s dedication to unraveling the Moon’s mysterious nature.
    • As data pours in from its payloads and instruments, the mission builds upon its predecessors, propelling our understanding of lunar geology, composition, and mysteries.

  • One Health Approach

    one health

    Central Idea

    • The global spotlight on the ‘One Health’ concept is illuminating India’s strides in integrating this paradigm to enhance its response to health challenges.
    • While gaining recent recognition, the One Health approach finds its roots in history.

    One Health Approach

    • Holistic Vision: The One Health approach acknowledges the intricate linkages between the health of humans, animals, plants, and their shared environment.
    • Historical Foundation: Early traces of One Health can be found in the teachings of Hippocrates and later articulated by 19th-century physician Rudolf Virchow, emphasizing unity in animal and human medicines.

    Addressing Modern Health Challenges

    • Environmental Impacts: Human growth, urbanization, and industrialization contribute to biodiversity and ecosystem disruption, fostering zoonotic diseases.
    • Zoonotic Diseases: Roughly 60% of emerging diseases that affect humans are zoonotic, including Ebola, bird flu, and rabies.
    • Key Concerns: The rise of antimicrobial resistance, vector-borne diseases, and food safety underscores the need for an integrated approach.

    Power of One Health Strategy

    • Resource Efficiency: One Health fosters coordination across governmental units, reducing resource demands and promoting cross-sectoral collaborations.
    • Economic Benefits: One Health proves economically prudent, potentially saving billions when compared to pandemic management through non-One-Health strategies.

    Recent One Health Endeavors in India

    • COVID-19 Impact: The COVID-19 pandemic underscored the importance of the One Health approach.
    • Indian Initiatives: India established a ‘Standing Committee on Zoonoses’ in 2006 and launched the ‘National One Health Mission’ for coordinated efforts.

    The Transformation Process: Four Stages

    • Stage 1: Communication: Setting up mechanisms for inter-ministerial communication and stakeholder engagement.
    • Stage 2: Collaboration: Exchange of knowledge and expertise, defining roles in zoonoses management.
    • Stage 3: Coordination: Long-term routine activities led by a dedicated agency for seamless collaboration.
    • Stage 4: Integration: Developing synergies between sectors for streamlined resource sharing and coordinated initiatives.

    Facilitating Collaborative Science

    • Integrated Research: Beyond office-sharing, integrated research environments are crucial, allowing access to laboratories and biological samples.
    • Sample Utilization: Efficient use of expensive and ethical biological samples, such as blood and tissue, enhances collaborative research outcomes.

    Conclusion

    • India’s embrace of the One Health approach reflects its commitment to holistic well-being.
    • By recognizing the interconnectedness of humans, animals, plants, and the environment, India is laying the groundwork for comprehensive health strategies.
    • With ongoing initiatives and a vision to seamlessly integrate resources and expertise, India aims to transform its health landscape, ensuring resilience against emerging challenges through a united and holistic approach.

  • Sex and gender considerations in biowarfare and disarmament

    Central idea

    • In August 2019, the United Nations Institute for Disarmament Research (UNIDIR) convened a conference to deliberate the incorporation of a gender-responsive approach within the Biological Weapons Convention (BWC). The conference centered on the nuanced impact of biowarfare on various genders and the need to comprehend the repercussions of intentional attacks and natural outbreaks on different sexes.

    Biological warfare

    • Biological warfare, or biowarfare, refers to the strategic use of disease-causing agents like bacteria, viruses, or toxins to harm or incapacitate individuals, populations, or ecosystems for military purposes, potentially causing widespread illness, death, and social disruption.

    Gender dynamics in historical biological warfare

    • Underrepresentation and Vulnerability: Historical biological warfare highlights gender-specific vulnerabilities, particularly affecting marginalized genders like women due to underrepresentation in research and agent development.
    • Apartheid-era South Africa: Deliberate use of biological weapons targeted political opponents; Project Coast attempted infertility in black women.
    • Sexually Transmitted Diseases as Weapons: Japan’s 1932-1945 experimentation with sexually transmitted diseases on captives, rape, and forced pregnancy as weapons of war
    • Chlamydia and Gender Impact: Chlamydia’s asymptomatic nature categorizes it as a sexually transmitted disease disproportionately impacting women.
    • Gender-disparate reactions and anthrax: anthrax disproportionately impacted US biological males (1998–2000). The anthrax vaccine caused stronger reactions in women.
    • Anthrax Attacks of 2001: Worst US biological attack, 2001 anthrax attacks resulted in 5 deaths and 17 severe illnesses.

    Emerging technology and biological warfare

    • Introduction to Emerging Technologies: The rise of gene editing tools, particularly CRISPR, brings novel dimensions to biological warfare, raising concerns and necessitating careful analysis.
    • Dual-Use Potential: A 2016 Worldwide Threat Assessment Report categorizes CRISPR as having dual-use potential, with implications for both medical advancements and weaponization capabilities.
    • Enhanced Pathogens: CRISPR’s application in gene editing could enhance pathogens by increasing their resistance to treatments and virulence, presenting a novel facet of biowarfare.
    • Gender Considerations: The application of CRISPR introduces gender-specific ethical concerns, particularly concerning genetic disorders related to reproductive health and fertility.
    • Complex Ethical Landscape: While the Biological Weapons Convention (BWC) primarily focuses on offensive research, CRISPR’s versatility demands nuanced evaluation, considering its dual-use potential in both medical research and weaponry.
    • Gender and Intersectionality: The impact of CRISPR intersects with gender, ethnicity, and race. It highlights that gender vulnerabilities could be exploited in wartime attacks targeting specific communities, necessitating an intersectional approach.
    • Broader Ethical Discourse: The implications of CRISPR’s use within biological warfare extend into a broader ethical and societal conversation, addressing its multifaceted impact and potential consequences.

    Enforcement of global biowarfare regulations

    • Importance of Enforcement: Enforcing regulations in global biowarfare is paramount to preventing misuse of biological agents. The Biological Weapons Convention (BWC) serves as a key framework, but gender considerations are notably absent.
    • Highlighting the Gender Gap: The 2019 UNIDIR conference emphasized the need for gender-responsive strategies within the BWC, underlining the significance of accounting for gender dynamics.
    • Broadened Scope: The BWC should expand its purview beyond offensive research to encompass emerging technologies like CRISPR, reflecting the changing landscape of biowarfare threats.
    • Collaborative Efforts: Effective enforcement requires collaboration among governments, international organizations, and the scientific community. This collaboration should facilitate research transparency and robust biosecurity measures.
    • Preventing Misuse: Gene-editing tools, including CRISPR, must be strictly regulated to prevent their misuse for biowarfare. Stringent controls are vital to avoiding their transformation into tools of destruction.
    • Advocacy for Gender-focused Disarmament: Noteworthy figures like Izumi Nakamitsu and countries like Norway advocate for gender-focused disarmament, acknowledging the need for gender considerations in the disarmament discourse.
    • UN’s First Committee: Norway’s advocacy within the UN’s First Committee underscores the growing recognition of gender representation in disarmament discussions, signaling progress toward gender-inclusive disarmament policies.

    Steps to enhance the gender dimension in biowarfare

    • Conduct epidemiological research on the differential impact of biological warfare on victims based on sex and gender.
    • Advance understanding of sex-related variations in immune and treatment responses to potential biological agents
    • Broaden the scope of biological warfare to encompass emerging technology and agents that can target sex, race, or ethnicity-based victims.

    Conclusion

    • Governments, international organizations, and the scientific community must collaboratively foster regulations, transparency, and biosecurity to avert the inappropriate utilization of gene-editing tools for biowarfare. Open dialogue and international cooperation stand as linchpins in navigating the ethical and security complexities of the CRISPR and biowarfare intersection.

  • Gene-edited mustard: Less pungent, more useful

    What’s the news?

    • Scientists have used gene editing to create mustard plants with lower glucosinolate levels in seeds, improving their suitability for cooking oil and animal feed, potentially reducing India’s reliance on imported vegetable oils.

    Central idea

    • India’s domestically grown oilseeds, like rapeseed and mustard, provide cooking oil and protein-rich livestock meals. However, the pungent flavor from high glucosinolate levels limits consumer appeal, and an unpalatable meal poses livestock challenges. A genetic breakthrough offers hope, potentially transforming mustard’s applications.

    Rapeseed-Mustard: A Key Crop

    • Rapeseed-mustard plays a vital role in India’s oilseed landscape, accounting for 42.6% of vegetable oil production and 30.3% of meal production, second only to soyabean.
    • Glucosinolates in mustard seeds contribute to the characteristic pungency of their oil and meal.

    What is glucosinolate?

    • Glucosinolates are a group of sulfur- and nitrogen-containing compounds found in plants, including rapeseed-mustard.
    • These compounds contribute to the distinctive pungent taste and aroma of mustard seeds and other cruciferous vegetables.
    • The glucosinolates in mustard seeds are responsible for their characteristic flavor but can also limit their acceptability for consumption and livestock feed due to their strong taste and potential negative effects on animals.

    The Distinction Between GE and GM Crops

    1. Genetically Modified (GM) Crops:
    • Contain foreign genes from other species, such as Bacillus thuringiensis bacteria in cotton or Bar-Barnase-Barstar in GM hybrid mustard.
    • Subject to stringent environmental release regulations in India, requiring clearance from the Genetic Engineering Appraisal Committee (GEAC) under the Ministry of Environment.
    • GEAC’s approval is not solely binding; final authorization comes from the Union Government.
    1. Genetically Edited (GE) Crops:
    • Are transgene-free or non-GM, containing no foreign genes.
    • The Cas9 enzyme, used for gene editing, is eliminated in subsequent generations, resulting in transgene-free lines.
    • Benefit from an exemption provided by the MoEFCC on the requirement for GEAC approval for open field trials of GE plants free of exogenous introduced DNA.
    • Approval is now necessary at the level of an Institutional Bio-Safety Committee (IBSC) comprising scientists engaged in GE crop development and the DBT.

    A Breakthrough in Gene Editing

    • Researchers, including those at Delhi University and the Indian Council of Agricultural Research, have employed CRISPR/Cas9 gene editing to address the glucosinolate issue.
    • They edited 10 out of 12 GTR genes in the Varuna mustard variety, significantly reducing glucosinolate content in seeds while maintaining higher levels in leaves and pod walls.
    • This editing also improved resistance to fungal pathogens and insect pests, enhancing the plant’s defense mechanisms.

    Significance of this development

    • Reducing Edible Oil Imports: India’s significant dependence on edible oil imports, valued at $20.84 billion (Rs 167,270 crore) for the FY ending March 2023, underscores the need to curb foreign exchange outflow and enhance domestic production.
    • Addressing Economic Strain: The extensive import value strains India’s trade balance and foreign exchange reserves, making it imperative to boost self-reliance in edible oil production.
    • Promoting Agricultural Self-Sufficiency: This development aligns with India’s goal of achieving greater agricultural self-sufficiency by reducing reliance on imports and enhancing domestic oilseed production.
    • Impact on Oilseed Crops: Mustard and soyabean, cultivated across 9 million and 12.5 million hectares, respectively, are key to India’s oilseed sector. Mustard’s higher oil-extractable content of 38% accentuates its significance.
    • Nutritional and Livestock Benefits: Mustard’s improved suitability for culinary and animal feed purposes positively impacts both human nutrition and the livestock sector.
    • Scientific Innovation: The creation of genetically edited (GE) low-seed, high-leaf glucosinolate mustard lines and GM hybrid mustard showcases India’s scientific capabilities and innovation in agriculture.
    • Enhanced Food Security: By augmenting domestic oilseed production and quality, this development contributes to India’s food security and reduces its vulnerability to global market fluctuations.

    Conclusion

    • The genetic breakthrough in editing mustard genes offers potential to revolutionize India’s oilseed sector. By lowering seed glucosinolate levels and maintaining higher leaf levels, it improves culinary and feed suitability. As the GE variety undergoes trials, it addresses oil seed production, import reliance, and self-sufficiency needs.

     

     

  • 3D Printing

    post office

    Central Idea

    • India’s pioneering 3D-printed post office located in Bengaluru’s Cambridge Layout was recently inaugurated.

    3D Printed Post Office

    • Swift Build: The 3D-printed post office was constructed in just 43 days, surpassing the original deadline by two days.
    • Construction Team: Larsen & Toubro Limited undertook the project in collaboration with IIT Madras.

    Technological Process

    • Spatial Dimension: The post office covers an area of 1,021 square feet and was created using advanced 3D concrete printing.
    • Automated Procedure: Robotic printers used an automated process to layer concrete according to the approved design.
    • Strong Bonding: A specially formulated quick-hardening concrete ensured strong bonding between layers.
    • Rapid Construction: With robotic precision and pre-embedded designs, the project was completed in just 43 days, far shorter than the conventional 6 to 8 months.

    Advantages of 3D Printing

    • Cost-Effective: The project cost ₹23 lakhs, indicating a 30-40% cost reduction compared to traditional methods.
    • Showcasing Technology: The project highlighted concrete 3D printing technology using indigenous machinery and robots, showcasing its scalability.

    Distinctive Features

    • Continuous Perimeter: The project boasted continuous perimeter construction without vertical joints.
    • Flexibility: The 3D printing accommodated curved surfaces and different site dimensions, overcoming flat wall limitations.
    • Structural Innovation: Continuous reinforced concrete footing and three-layer walls were created, enhancing structural integrity.
    • Reduced Timeline: The innovative technique drastically reduced the construction timeline to 43 days, minimizing material wastage.

    Back2Basics: 3D Printing

    • 3D printing, also known as additive manufacturing, is a transformative technology that involves creating three-dimensional objects by adding material layer by layer.
    • This technology has found applications in various industries, from manufacturing and aerospace to healthcare and fashion.

    Here’s an overview of the technology and its key components:

    (A) Printing Process: The basic process of 3D printing involves the following steps:

    • Design: Create a 3D model using computer-aided design (CAD) software.
    • Slicing: The 3D model is divided into thin horizontal layers using slicing software.
    • Printing: The 3D printer follows the instructions from the sliced file, depositing material layer by layer to build up the object.

    (B) Types of 3D Printing Technologies: There are several 3D printing technologies, each with its own unique approach to material deposition and layering. Some common types include:

    • Fused Deposition Modeling (FDM): This is one of the most popular methods. It involves extruding thermoplastic material through a heated nozzle to build up layers.
    • Stereolithography (SLA): SLA uses a UV laser to solidify liquid resin layer by layer, creating highly detailed and accurate objects.
    • Selective Laser Sintering (SLS): In SLS, a laser fuses powdered material (often plastic or metal) layer by layer to create the object.
    • Powder Bed Fusion (PBF): Similar to SLS, PBF involves fusing powder particles using a laser or electron beam to create metal parts.
    • Digital Light Processing (DLP): Similar to SLA, DLP uses a projector to cure an entire layer of resin at once.

  • Agnibaan: Pioneering with 3D-Printed Engines

    agni

    Central Idea

    • Chennai-based Agnikul Cosmos takes a significant step as it moves its innovative rocket, Agni-1, to Sriharikota for integration assessments.
    • Successful integration checks could position Agnikul as the second Indian space-tech firm, following Skyroot Aerospace, to achieve suborbital space flight capability.

    Agnikul’s Remarkable Space Vehicle: Agnibaan

    • Agnibaan SOrTeD is a single-stage launch vehicle powered by Agnikul’s patented Agnilet semi-cryogenic engine.
    • In contrast to traditional sounding rockets, Agnibaan SOrTeD’s vertical take-off and precise trajectory enable orchestrated maneuvers during flight.

    (A) Distinct Features of Agnibaan

    • Customizability: The rocket offers custom launch configurations, either single or two-stage launches.
    • Impressive Dimensions: Standing at 18 meters and weighing 14,000 kg, Agnibaan SOrTeD is a powerful presence.
    • Payload Capacity: With a capacity for payloads of up to 100 kg, it can reach altitudes of 700 km in five different Lower Earth Orbits (LEOs).
    • Engine Configuration: The first stage can house up to seven Agnilet engines, powered by Liquid Oxygen and Kerosene, dependent on the mission’s requirements.
    • Versatile Launch: Designed for launch from over 10 different launch ports.
    • Launch Pedestal ‘Dhanush’: AgniKul’s built ‘Dhanush’ supports the rocket’s mobility across configurations, ensuring compatibility with multiple launch ports.
    • Cutting-Edge Agnilet Engine: The world’s sole single-piece 3D-printed engine powers the entire operation.

    (B) Innovative Agnilet Engine

    • Heart of the Vehicle: Agnilet engine, a 3D-printed, single-piece, 6 kN semi-cryogenic marvel, drives Agnibaan’s propulsion.
    • Propellant Composition: The engine employs a novel blend of liquid kerosene and supercold liquid oxygen as propellants, successfully tested at the Vikram Sarabhai Space Centre.