Browsing by Author "Kumar, Ashok"

Now showing 1 - 7 of 7
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    Advances in Probiotics for Sustainable Food and Medicine
    (Springer Singapore., 2021) Goel, Gunjan; Kumar, Ashok
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    Asymmetric link between PPP investment and transport CO2 emissions in india: A QARDL perspective
    (2026) Kumar, Ashok
    The transport sector is the third most polluting sector in India. So, transforming it into a more efficient and environmentally sustainable sector is essential., where Public Private Partnerships (PPPs) could play a crucial role. To address modifica tion at the policy level in India, the current study examined how transport carbon emissions are influenced by PPP investment along with urbanization, economic growth, FDI, trade openness and environmental technology innovations. The Quan tile Autoregressive Distributed Lag Model (QARDL) has been used for the period 1998Q1-2022Q4. The key results highlights that PPP investment in long run is insignificant in most of the quantiles but significant and negative in the quantiles ranging from 0.6 to 0.9 in short run reflecting the impact of PPP investment in high er quantiles. The Environmental Kuznets Curve (EKC) hypothesis has also been established in the data, whereas urbanization associated with the reduced transport sector emission in 0.2 to 0.9 quantiles. The study also found environmental technol ogy innovation associated with reduced transport emissions. Trade openness found insignificant in long run but significant and adverse effect on the environment in the short run. FDI have adverse effect on transport emission in the long run in all quantiles (0.1–0.9). Finally, policy proposals have been made for transport sector to reduce transport CO2 emissions in India.
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    Engineering 2D materials for photocatalytic water-splitting from a theoretical perspective
    (Materials, 2022) Tankeshwar, Kumar; Ahluwalia, Pradeep K.; Kumar, Ashok; Jakhar, Mukesh; Pandey, Ravindra
    Splitting of water with the help of photocatalysts has gained a strong interest in the scientific community for producing clean energy, thus requiring novel semiconductor materials to achieve highyield hydrogen production. The emergence of 2D nanoscale materials with remarkable electronic and optical properties has received much attention in this field. Owing to the recent developments in highend computation and advanced electronic structure theories, first principles studies offer powerful tools to screen photocatalytic systems reliably and efficiently. This review is organized to highlight the essential properties of 2D photocatalysts and the recent advances in the theoretical engineering of 2D materials for the improvement in photocatalytic overall water-splitting. The advancement in the strategies including (i) single-atom catalysts, (ii) defect engineering, (iii) strain engineering, (iv) Janus structures, (v) type-II heterostructures (vi) Z-scheme heterostructures (vii) multilayer configurations (viii) edge-modification in nanoribbons and (ix) the effect of pH in overall watersplitting are summarized to improve the existing problems for a photocatalytic catalytic reaction such as overcoming large overpotential to trigger the water-splitting reactions without using cocatalysts. This review could serve as a bridge between theoretical and experimental research on next-generation 2D photocatalysts.
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    Engineering 2D materials for photocatalytic water-splitting from a theoretical perspective
    (Materials, 2022) Jakhar, Mukesh; Kumar, Ashok; Ahluwalia, Pradeep K.; Tankeshwar, Kumar; Pandey, Ravindra
    Splitting of water with the help of photocatalysts has gained a strong interest in the scientific community for producing clean energy, thus requiring novel semiconductor materials to achieve highyield hydrogen production. The emergence of 2D nanoscale materials with remarkable electronic and optical properties has received much attention in this field. Owing to the recent developments in highend computation and advanced electronic structure theories, first principles studies offer powerful tools to screen photocatalytic systems reliably and efficiently. This review is organized to highlight the essential properties of 2D photocatalysts and the recent advances in the theoretical engineering of 2D materials for the improvement in photocatalytic overall water-splitting. The advancement in the strategies including (i) single-atom catalysts, (ii) defect engineering, (iii) strain engineering, (iv) Janus structures, (v) type-II heterostructures (vi) Z-scheme heterostructures (vii) multilayer configurations (viii) edge-modification in nanoribbons and (ix) the effect of pH in overall watersplitting are summarized to improve the existing problems for a photocatalytic catalytic reaction such as overcoming large overpotential to trigger the water-splitting reactions without using cocatalysts. This review could serve as a bridge between theoretical and experimental research on next-generation 2D photocatalysts.
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    Microbes for Natural Food Additives.
    (Springer Singapore., 2022) Kumar, Ashok; Goel, Gunjan
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    Wuhan to world: The COVID-19 pandemic
    (Frontiers in Cellular and Infection Microbiology, 2021) Kumar, Ashok; Singh, Rita; Kaur, Jaskaran; Pandey, Sweta; Sharma, Vinita; Thakur, Lovnish; Chaudhuri, Susmita; Bhattacharyya, Sankar
    COVID-19 is a Severe Acute Respiratory Syndrome (SARS), caused by SARS-CoV-2, a novel virus which belongs to the family Coronaviridae. It was first reported in December 2019 in theWuhan city of China and soon after, the virus and hence the disease got spread to the entire world. As of February 26, 2021, SARS-CoV-2 has infected ~112.20 million people and caused ~2.49 million deaths across the globe. Although the case fatality rate among SARS-CoV-2 patient is lower (~2.15%) than its earlier relatives, SARS-CoV (~9.5%) and MERS-CoV (~34.4%), the SARS-CoV-2 has been observed to be more infectious and caused higher morbidity and mortality worldwide. As of now, only the knowledge regarding potential transmission routes and the rapidly developed diagnostics has been guiding the world for managing the disease indicating an immediate need for a detailed understanding of the pathogen and the disease-biology. Over a very short period of time, researchers have generated a lot of information in unprecedented ways in the key areas, including viral entry into the host, dominant mutation, potential transmission routes, diagnostic targets and their detection assays, potential therapeutic targets and drug molecules for inhibiting viral entry and/or its replication in the host including cross-neutralizing antibodies and vaccine candidates that could help us to combat the ongoing COVID-19 pandemic. In the current review, we have summarized the available knowledge about the pathogen and the disease, COVID-19. We believe that this readily available knowledge base would serve as a valuable resource to the scientific and clinical community and may help in faster development of the solution to combat the disease.