142 results on '"Nayak AK"'
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2. Soil carbon dynamics and enzymatic activities under different resource conservation technologies in rice-green gram cropping system
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Dash, PK, Bhattacharyya, P, Shahid, and Nayak, AK
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- 2018
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3. QbD-driven formulation development and evaluation of topical hydrogel containing ketoconazole loaded cubosomes
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Rapalli, VK, Banerjee, Saswata, Khan, S, Jha, PN, Gupta, G, Dua, K, Hasnain, MS, Nayak, AK, Dubey, SK, Singhvi, G, Rapalli, VK, Banerjee, Saswata, Khan, S, Jha, PN, Gupta, G, Dua, K, Hasnain, MS, Nayak, AK, Dubey, SK, and Singhvi, G
- Published
- 2021
4. Eco-smart pest management in rice farming: prospects and challenges
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Mohapatra, SD, primary, Tripathi, R, additional, Kumar, Anjani, additional, Kar, Suchismita, additional, Mohapatra, Minati, additional, Shahid, M, additional, Raghu, S, additional, Gowda, BG, additional, Nayak, AK, additional, and Pathak, H, additional
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- 2019
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5. Nitrogen management in rice
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Panda, D, primary, Nayak, AK, additional, and Mohanty, S, additional
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- 2019
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6. Thermal hydraulics of natural circulation loop in beam-down solar power tower
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THALANGE, VC, PAL, E, MINOCHA, N, NAYAK, AK, MAHAJANI, SM, PANSE, SV, and JOSHI, JB
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STEADY-STATE ,Beam-down ,CSP ,HEAT-TRANSFER ,FLOW ,Solar power tower ,Molten salt ,REACTOR ,Natural circulation loop ,BEHAVIOR - Abstract
There have been continuous efforts by researchers and power producing companies to reduce various costs involved in solar power tower (SPT) plants. Economically deploying conventional SPT plants for industries using thermal or thermo-chemical processes which need temperatures >1100 K could be challenging. Here, the overall economics of deployment of conventional SPT could go unfair as such design needs larger heliostat field, therefore costlier stiffer heliostats to reach high concentration ratio (CR). These challenges can be solved by beam-down SPT which uses secondary reflector mounted on tower top and receiver cum secondary concentrator on the ground could achieve desired CR, is one potential candidate to save on tower construction and pumping costs. Using beam-down SPT heat can be made available at the ground which opens an option of extracting the heat using natural circulation loop (NCL). The current paper explores the new proposed configuration of NCL in terms of understanding thermal hydraulics using 3-D CFD simulations. Further, it also incorporates optimization of the proposed design configuration using formulated heat transfer model. The optimized geometry is simulated using 3-D CFD simulation which gave the desired rating. (C) 2018 Elsevier Ltd. All rights reserved.
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- 2018
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7. Restoration of blinking reflex and facial symmetry in a Bell's palsy patient.
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Somani P and Nayak AK
- Published
- 2011
8. Empowering Tri-Functional Palladium's Catalytic Activity and Durability in Electrocatalytic Formic Acid Oxidation Reaction via Innovative Self-Caging and Alloying Strategies.
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Lee CW, Jung SY, Ryu JH, Jeon GS, Gaur A, Cho MS, Ali G, Kim M, Chung KY, Nayak AK, Shin S, Kwon J, Song T, Shin TH, and Han H
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Direct formic acid fuel cells (DFAFCs) stand out for portable electronic devices owing to their ease of handling, abundant fuel availability, and high theoretical open circuit potential. However, the practical application of DFAFCs is hindered by the unsatisfactory performance of electrocatalysts for the sluggish anodic formic acid oxidation reaction (FAOR). Palladium (Pd) based nanomaterials have shown promise for FAOR due to their highly selective reaction mechanism, but maintaining high electrocatalytic durability remains challenging. In this study, a novel Pd-based electrocatalyst (UiO-Pd-E) is reported with exceptional durability and activity for FAOR, which can be attributed to the Pd nanoparticles encapsulated within a carbon framework where concurrent chemical alloying of Pd and Zr occurs. Further, the UiO-Pd-E demonstrates noteworthy multifunctionality in various electrochemical reactions including electrocatalytic ethanol oxidation reaction (EOR) and oxygen reduction reaction (ORR) in addition to the FAOR, highlighting its practical potentials., (© 2024 The Author(s). Advanced Science published by Wiley‐VCH GmbH.)
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- 2024
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9. Predicting Breast Cancer Relapse from Histopathological Images with Ensemble Machine Learning Models.
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Sahoo G, Nayak AK, Tripathy PK, Panigrahi A, Pati A, Sahu B, Mahanty C, and Mallik S
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- Humans, Female, Middle Aged, Breast Neoplasms pathology, Machine Learning, Neoplasm Recurrence, Local
- Abstract
Relapse and metastasis occur in 30-40% of breast cancer patients, even after targeted treatments like trastuzumab for HER2-positive breast cancer. Accurate individual prognosis is essential for determining appropriate adjuvant treatment and early intervention. This study aims to enhance relapse and metastasis prediction using an innovative framework with machine learning (ML) and ensemble learning (EL) techniques. The developed framework is analyzed using The Cancer Genome Atlas (TCGA) data, which has 123 HER2-positive breast cancer patients. Our two-stage experimental approach first applied six basic ML models (support vector machine, logistic regression, decision tree, random forest, adaptive boosting, and extreme gradient boosting) and then ensembled these models using weighted averaging, soft voting, and hard voting techniques. The weighted averaging ensemble approach achieved enhanced performances of 88.46% accuracy, 89.74% precision, 94.59% sensitivity, 73.33% specificity, 92.11% F-Value, 71.07% Mathew's correlation coefficient, and an AUC of 0.903. This framework enables the accurate prediction of relapse and metastasis in HER2-positive breast cancer patients using H&E images and clinical data, thereby assisting in better treatment decision-making.
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- 2024
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10. A miniature alternative to Cas9 and Cas12: Transposon-associated TnpB mediates targeted genome editing in plants.
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Karmakar S, Panda D, Panda S, Dash M, Saha R, Das P, Avinash SP, Shih J, Yang Y, Nayak AK, Baig MJ, and Molla KA
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- 2024
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11. Context-dependent agricultural intensification pathways to increase rice production in India.
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Nayak HS, McDonald AJ, Kumar V, Craufurd P, Dubey SK, Nayak AK, Parihar CM, Peramaiyan P, Poonia S, Tesfaye K, Malik RK, Urfels A, Gautam US, and Silva JV
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- India, Nitrogen metabolism, Fertilizers, Oryza growth & development, Crops, Agricultural growth & development, Crop Production methods, Agricultural Irrigation methods, Agriculture methods
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Yield gap analysis is used to characterize the untapped production potential of cropping systems. With emerging large-n agronomic datasets and data science methods, pathways for narrowing yield gaps can be identified that provide actionable insights into where and how cropping systems can be sustainably intensified. Here we characterize the contributing factors to rice yield gaps across seven Indian states, with a case study region used to assess the power of intervention targeting. Primary yield constraints in the case study region were nitrogen and irrigation, but scenario analysis suggests modest average yield gains with universal adoption of higher nitrogen rates. When nitrogen limited fields are targeted for practice change (47% of the sample), yield gains are predicted to double. When nitrogen and irrigation co-limitations are targeted (20% of the sample), yield gains more than tripled. Results suggest that analytics-led strategies for crop intensification can generate transformative advances in productivity, profitability, and environmental outcomes., (© 2024. The Author(s).)
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- 2024
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12. Hydrologic variability governs GHG emissions in rice-based cropping systems of Eastern India.
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Arenas-Calle L, Sherpa S, Rossiter D, Nayak H, Urfels A, Kritee K, Poonia S, Singh DK, Choudhary A, Dubey R, Kumar V, Nayak AK, and McDonald A
- Abstract
Reducing methane (CH
4 ) emissions is increasingly recognized as an urgent greenhouse gas mitigation priority for avoiding ecosystem 'tipping points' that will accelerate global warming. Agricultural systems, namely ruminant livestock and rice cultivation are dominant sources of CH4 emissions. Efforts to reduce methane from rice typically focus on water management strategies that implicitly assume that irrigated rice systems are consistently flooded and that farmers exert a high level of control over the field water balance. In India most rice is cultivated during the monsoon season and hydrologic variability is common, particularly in the Eastern Gangetic Plains (EGP) where high but variable rainfall, shallow groundwater, and subtle differences in topography interact to create complex mosaics of field water conditions. Here, we characterize the hydrologic variability of monsoon season rice fields ( n = 207) in the Indian EGP ('Eastern India') across two contrasting climate years (2021, 2022) and use the D e n itrification D e c omposition (DNDC) model to estimate GHG emissions for the observed hydrologic conditions. Five distinct clusters of field hydrology patterns were evident in each year, but cluster characteristics were not stable across years. In 2021, average GHG emissions (8.14 mt CO2 -eq ha-1 ) were twice as high as in 2022 (3.81 mt CO2 -eq ha-1 ). Importantly, intra-annual variability between fields was also high, underlining the need to characterize representative emission distributions across the landscape and across seasons to appropriately target GHG mitigation strategies and generate accurate baseline values. Simulation results were also analyzed to identify main drivers of emissions, with readily identified factors such as flooding period and hydrologic interactions with crop residues and nitrogen management practices emerging as important. These insights provide a foundation for understanding landscape variability in GHG emissions from rice in Eastern India and suggest priorities for mitigation that honor the hydrologic complexity of the region., Competing Interests: The authors declare that they have no conflicts of interest., (© 2024 The Authors.)- Published
- 2024
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13. Endothelial calcium dynamics elicited by ATP release from red blood cells.
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Nayak AK, Das SL, and Misbah C
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- Humans, Calcium Signaling, Erythrocytes metabolism, Adenosine Triphosphate metabolism, Calcium metabolism, Endothelial Cells metabolism
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Red blood cells (RBCs) exhibit an interesting response to hydrodynamic flow, releasing adenosine triphosphate (ATP). Subsequently, these liberated ATP molecules initiate a crucial interaction with endothelial cells (ECs), thereby setting off a cascade involving the release of calcium ions (Ca 2 + ). Ca 2 + exerts control over a plethora of cellular functions, and acts as a mediator for dilation and contraction of blood vessel walls. This study focuses on the relationship between RBC dynamics and Ca 2 + dynamics, based on numerical simulations under Poiseuille flow within a linear two-dimensional channel. It is found that the concentration of ATP depends upon a variety of factors, including RBC density, channel width, and the vigor of the flow. The results of our investigation reveals several features. Firstly, the peak amplitude of Ca 2 + per EC escalates in direct proportion to the augmentation of RBC concentration. Secondly, increasing the flow strength induces a reduction in the time taken to reach the peak of Ca 2 + concentration, under the condition of a constant channel width. Additionally, when flow strength remains constant, an increase in channel width corresponds to an elevation in calcium peak amplitude, coupled with a decrease in peak time. This implies that Ca 2 + signals should transition from relatively unconstrained channels to more confined pathways within real vascular networks. This notion gains support from our examination of calcium propagation in a linear channel. In this scenario, the localized Ca 2 + release initiates a propagating wave that gradually encompasses the entire channel. Notably, our computed propagation speed agrees with observations., (© 2024. The Author(s).)
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- 2024
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14. An immunoinformatic approach for developing a multi-epitope subunit vaccine against Monkeypox virus.
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Nayak AK, Chakraborty A, Shukla S, Kumar N, and Samanta S
- Abstract
An in-silico approach was implemented to develop a multi-epitope subunit vaccine construct against the recent outbreak of the Monkeypox virus. The contribution of 10 different antigenic proteins based on their antigenicity led to the selection of 10 HTL, 9 CTL, and 6 BCL epitopes. The construct was further investigated for its allergenicity, antigenicity, and physio-chemical properties using servers such as AllerTOP and Allergen FP, VaxiJen and ANTIGENPro, and ProtParam respectively. The secondary structure of the vaccine was predicted using the SOPMA server followed by I-TASSER for the 3D structure. After refinement and validation of structural stability of the modelled vaccine, a molecular docking assay was implemented to study the interaction of the known TLR4 receptor with that of the constructed vaccine using the ClusPro server. The docked vaccine and TLR4 receptor were studied using the molecular dynamics (MD) simulation to validate the stability of the complex. After codon optimization the cDNA was constructed and in-silico cloning of the vaccine construct was carried out. The vaccine was also subjected to computational immune assay which predicted a powerful immune response against the Monkeypox virus validating that the developed multi-epitope vaccine construct can be a potent vaccine candidate., Supplementary Information: The online version contains supplementary material available at 10.1007/s40203-024-00220-5., Competing Interests: Conflict of interestThe authors declare no competing interests., (© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.)
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- 2024
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15. Strigolactone GR24-mediated mitigation of phosphorus deficiency through mycorrhization in aerobic rice.
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Mitra D, Panneerselvam P, Chidambaranathan P, Nayak AK, Priyadarshini A, Senapati A, and Mohapatra PKD
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Strigolactones (SLs) are a new class of plant hormones that play a significant role in regulating various aspects of plant growth promotion, stress tolerance and influence the rhizospheric microbiome. GR24 is a synthetic SL analog used in scientific research to understand the effects of SL on plants and to act as a plant growth promoter. This study aimed to conduct hormonal seed priming at different concentrations of GR24 (0.1, 0.5, 1.0, 5.0 and 10.0 µM with and without arbuscular mycorrhizal fungi (AMF) inoculation in selected aerobic rice varieties (CR Dhan 201, CR Dhan 204, CR Dhan 205, and CR Dhan 207), Kasalath-IC459373 (P-tolerant check), and IR-36 (P-susceptible check) under phosphorus (P)-deficient conditions to understand the enhancement of growth and priming effects in mycorrhization. Our findings showed that seed priming with 5.0 µM SL GR24 enhanced the performance of mycorrhization in CR Dhan 205 (88.91 %), followed by CR Dhan 204 and 207, and AMF sporulation in CR Dhan 201 (31.98 spores / 10 gm soil) and CR Dhan 207 (30.29 spores / 10 g soil), as well as rice growth. The study showed that the highly responsive variety CR Dhan 207 followed by CR Dhan 204, 205, 201, and Kasalath IC459373 showed higher P uptake than the control, and AMF treated with 5.0 µM SL GR24 varieties CR Dhan 205 followed by CR Dhan 207 and 204 showed the best performance in plant growth, chlorophyll content, and soil functional properties, such as acid and alkaline phosphatase activity, soil microbial biomass carbon (MBC), dehydrogenase activity (DHA), and fluorescein diacetate activity (FDA). Overall, AMF intervention with SL GR24 significantly increased plant growth, soil enzyme activity, and uptake of P compared to the control. Under P-deficient conditions, seed priming with 5.0 µM strigolactone GR24 and AMF inoculum significantly increased selected aerobic rice growth, P uptake, and soil enzyme activities. Application of SLs formulations with AMF inoculum in selected aerobic rice varieties, CR Dhan 207, CR Dhan 204, and CR Dhan 205, will play an important role in mycorrhization, growth, and enhancement of P utilization under P- nutrient deficient conditions., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
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- 2024
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16. Exploring genetic divergence and marker-trait associations for leaffolder Cnaphalocrocis medinalis (Guenee) resistance in rice landraces.
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Nayak AK, Golive P, Sasmal A, Devanna BN, Anilkumar C, Mukherjee AK, Dash SS, Das Mohapatra S, and Subudhi H
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Rice production faces a significant threat from the rice leaffolder, Cnaphalocrocis medinalis . To address this challenge, growing resistant varieties stands out as a sustainable and eco-friendly pest management strategy. This necessitates identifying resistant sources and understanding their inheritance patterns through employing DNA markers for marker-assisted resistance breeding. Our study involves screening for resistant cultivars following the SES of IRRI, assessing genetic diversity among landraces using molecular markers, and identifying genomic regions associated with resistance. Screening indicated that 33.33%, 27.08%, 19.79%, and 19.80% of genotypes were resistant, moderately resistant, susceptible, and admixture, respectively. Landraces were categorized into three clusters, with clusters I and II predominantly containing moderately resistant and resistant cultivars, and cluster III mainly susceptible types. Molecular variance analysis revealed 12% variation among populations and 88% within the population. Simple linear regression identified significant marker-trait associations, with markers RM 162 and RM 284 on chromosomes 6 and 8, respectively, found highly associated with leaffolder resistance. Phenotypic variation in leaffolder damage correlated highly with the allelic effects of these markers. Further confirmation of marker linkage with resistance loci was established through independent assays on highly resistant and susceptible genotypes. The information derived from genetic diversity and marker-trait associations will be useful for future marker-assisted resistance breeding programs, enhancing the sustainability of rice production., Competing Interests: Conflict of interestOn behalf of all authors, the corresponding author states that there is no conflict of interest., (© King Abdulaziz City for Science and Technology 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.)
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- 2024
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17. Reducing the environmental impact of rice production in subtropical India by minimising reactive nitrogen loss.
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Chatterjee D, Das SR, Mohanty S, Muduli BC, Bhatia A, Nayak BK, Rees RM, Drewer J, Nayak AK, Adhya TK, Parameswaran C, Meher J, Mondal B, Sutton MA, and Pathak H
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- Nitrogen analysis, Agriculture methods, Ammonia analysis, Soil, Fertilizers analysis, Nitrous Oxide analysis, Oryza
- Abstract
The future of reactive nitrogen (N) for subtropical lowland rice to be characterised under diverse N-management to develop adequate sustainable practices. It is a challenge to increase the efficiency of N use in lowland rice, as N can be lost in various ways, e.g., through nitrous oxide (N
2 O) or dinitrogen (N2 ) emissions, ammonia (NH3 ) volatilization and nitrate (NO3 - ) leaching. A field study was carried out in the subsequent wet (2021) and dry (2022) seasons to assess the impacts of different N management strategies on yield, N use efficiency and different N losses in a double-cropped rice system. Seven different N-management practices including application of chemical fertilisers, liquid organic fertiliser, nitrification inhibitors, organic nutrient management and integrated nutrient management (INM) were studied. The application of soil test-based neem-coated urea (NCU) during the wet season resulted in the highest economic yield, while integrated nutrient management showed the highest economic yield during the dry season. Total N losses by volatilization of NH3 , N2 O loss and leaching were 0.06-4.73, 0.32-2.14 and 0.25-1.93 kg ha-1 , corresponding to 0.06-5.84%, 0.11-2.20% and 0.09-1.81% of total applied N, respectively. The total N-uptake in grain and straw was highest in INM (87-89% over control) followed by the soil test-based NCU (77-82% over control). In comparison, recovery efficiency of N was maximum from application of NCU + dicyandiamide during both the seasons. The N footprint of paddy rice ranged 0.46-2.01 kg N-eq. t-1 during both seasons under various N management. Ammonia volatilization was the process responsible for the largest N loss, followed by N2 O emissions, and NO3 - leaching in these subtropical lowland rice fields. After ranking the different N management practices on a scale of 1-7, soil test-based NCU was considered the best N management approach in the wet year 2021, while INM scored the best in the dry year 2022., Competing Interests: Declaration of competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
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18. Social and biological evaluation of antimicrobial resistance (SOBEAR) in rural India: a study protocol.
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Pattnaik M, Nayak AK, Karna S, Rehman T, Sahoo SK, Palo SK, Kanungo S, Kshatri JS, Parai D, Walia K, Pati S, and Bhattacharya D
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- Humans, Qualitative Research, Drug Resistance, Bacterial, Health Knowledge, Attitudes, Practice, India, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents therapeutic use, Quinolones
- Abstract
Background: Antimicrobial resistance (AMR) has been one of the biggest global health threats in recent years, mostly in low- and middle-income countries, which requires urgent research using a multidisciplinary research approach. The use of large quantities of antimicrobial drugs inappropriately for humans, poultry and agriculture has been recognized as a leading cause of antibiotic resistance and the predominance of drug-resistance pathogens in the environment. This protocol aims to describe the use/misuse of antibiotics (ABs) in the community and evaluate clinical samples from healthcare settings to detect genes associated with antimicrobial resistance., Methods: We will conduct a community-level survey in different villages of the Tigiria block to assess knowledge and awareness on ABs and AMR. We will conduct in-depth interviews (IDIs) with doctors, pharmacists, nurses and drug sellers, as well as focus group discussions (FGDs) with ASHA and ANM workers who are involved in antibiotic supplies to the community. Quantitative data from the community survey and qualitative data of IDIs and FGDs will be linked and analyzed using statistical modeling and iterative thematic content analysis. Specimens (stool, urine, blood and wound/pus) will be collected from clinically diagnosed patients of different healthcare centers of Tigiria block. The samples will be cultured for bacterial isolation and antibiotic sensitivity testing. Genomic DNA will be isolated from positive bacterial cultures and sequenced using PCR to evaluate high-threat multi-drug resistance organisms (MDROs), screening of plasmid-mediated quinolone resistance (PMQR) genes, antimicrobial genes responsible for MDR and quinolone resistance-determining regions (QRDRs)., Conclusion: This is the community-based protocol to evaluate the knowledge, attitudes, awareness and practices regarding ABs and AMR. The study protocol establishes a foundation for evaluating population-based prevalence and risk factors for AMR and MDROs in rural areas of the Odisha state, India., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision., (Copyright © 2024 Pattnaik, Nayak, Karna, Rehman, Sahoo, Palo, Kanungo, Kshatri, Parai, Walia, Pati and Bhattacharya.)
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- 2024
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19. Two-component nematic superconductivity in 4Hb-TaS 2 .
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Silber I, Mathimalar S, Mangel I, Nayak AK, Green O, Avraham N, Beidenkopf H, Feldman I, Kanigel A, Klein A, Goldstein M, Banerjee A, Sela E, and Dagan Y
- Abstract
Most superconductors have an isotropic, single component order parameter and are well described by the standard (BCS) theory for superconductivity. Unconventional, multiple-component superconductors are exceptionally rare and are much less understood. Here, we combine scanning tunneling microscopy and angle-resolved macroscopic transport for studying the candidate chiral superconductor, 4Hb-TaS
2 . We reveal quasi-periodic one-dimensional modulations in the tunneling conductance accompanied by two-fold symmetric superconducting critical field. The strong modulation of the in-plane critical field, Hc2 , points to a nematic, unconventional order parameter. However, the imaged vortex core is isotropic at low temperatures. We suggest a model that reconciles this apparent discrepancy and takes into account previously observed spontaneous time-reversal symmetry breaking at low temperatures. The model describes a competition between a dominating chiral superconducting order parameter and a nematic one. The latter emerges close to the normal phase. Our results strongly support the existence of two-component superconductivity in 4Hb-TaS2 and can provide valuable insights into other systems with coexistent charge order and superconductivity., (© 2024. The Author(s).)- Published
- 2024
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20. Growing Conditions and Varietal Ecologies Differently Regulates the Growth-regulating-factor (GRFs) Gene Family in Rice.
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Kishore Sahoo R, Jeughale KP, Sarkar S, Selvaraj S, Singh NR, Swain N, Balasubramaniasai C, Chidambaranathan P, Katara JL, Nayak AK, and Samantaray S
- Abstract
Background: Growth-regulating factors (GRFs) are crucial in rice for controlling plant growth and development. Among the rice cultivation practices, aerobic methods are water efficient but result in significant yield reduction relative to non-aerobic cultivation. Therefore, mechanistic insights into aerobic rice cultivation are important for improving the aerobic performance of rice., Objectives: This study aimed to examine the evolution of GRFs in different rice species, analyse the phenotypic differences between aerobic and non-aerobic conditions in three rice varieties, and assess the expression of GRFs in these varieties under both aerobic and non-aerobic conditions., Materials and Methods: This study comprehensively examined the GRFs gene family in 11 rice species ( Oryza barthii , Oryza brachyantha , Oryza glaberrima , Oryza glumipatula , Oryza sativa subsp. indica , Oryza longistaminata , Oryza meridionalis , Oryza nivara , Oryza punctata , Oryza rufipogon , Oryza sativa subsp. japonica ) focusing on phylogenetic analysis. Additionally, the expression patterns of 12 GRFs were investigated in three distinct genotypes of O. sativa subsp. indica rice, under both non-aerobic and aerobic conditions., Results: Three major phylogenetic clades were formed based on conserved motifs in the 123 GRFs proteins in eleven rice species. Further, novel motifs were identified especially in O. longistaminata indicative of the species level evolutionary differences in rice. Among the trait performance, the number of tillers was reduced by ~ 36% under aerobic conditions, but the reduction was found to be less in CR Dhan 201, an aerobic variety. Besides, three GRFs namely GRF3, GRF4, and GRF7 were found to be distinct in expression between aerobic and non-aerobic conditions., Conclusion: Three GRF genes namely GRF3, GRF4, and GRF7 could be associated with the aerobic adaptation in rice., Competing Interests: No conflict of interests, (Copyright: © 2021 The Author(s); Published by Iranian Journal of Biotechnology.)
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- 2024
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21. Conveyance of sofosbuvir through vesicular lipid nanocarriers as an effective strategy for management of viral meningitis.
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Satapathy BS, Sahoo PK, Pattnaik S, Nayak AK, Maharana L, and Sahoo RN
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This study aimed to deliver a potential water-soluble antiviral drug (sofosbuvir) through optimized vesicular lipid nanocarriers (LNs) to the rat brain as a novel strategy against viral meningitis. A 2
3 factorial design approach was established to assess the effect of formulation composition and process variables on the physicochemical properties of the LNs. Sofosbuvir-loaded LNs (SLNs) were developed by lipid layer hydration method utilizing optimized parameters and evaluated for various in vitro characterizations like FTIR, DSC, XRD, FESEM, vesicle size, zeta potential, drug carrying capacity and drug release. Plasma and brain pharmacokinetic (PK) studies were conducted in Sprague-Dawley rats. FTIR data depicted the absence of any major interaction between the drug and the excipients. DSC revealed a sharp endothermic peak for the drug. XRD showed the amorphic nature of the SLNs. Optimized SLNs were spherical as depicted from FESEM with 42.43 nm size, -49.21 mV zeta potential, 8.31% drug loading and sustained drug release in vitro . Plasma/brain PK studies depicted significant improvement in key PK parameters, viz . AUC, AUMC, MRT, and Vd , compared to those for the free drug. A more than 3.5-fold increase in MRT was observed for optimized SLNs (11.2 h) in brain tissue compared to the free drug (3.7 h). Ex vivo hemolysis data confirmed the non-toxic nature of the SLNs to human red blood cells. In silico docking study further confirmed strong interaction between the drug and selected protein 4YXP (herpes simplex) with docking score of -7.5 and 7EWQ protein (mumps virus) with docking score of -7.3. The optimized SLNs may be taken for further in vivo studies to pave the way towards clinical translation., Competing Interests: The authors of the article have no conflicts of interest to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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22. Randomised Control Study of Misoprostol and Mifepristone versus Misoprostol Alone in Second Trimester Termination of Pregnancy.
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Nayak AK, Mishra S, Mishra S, Patnaik R, and Mohapatra I
- Abstract
Introduction: This study was done to assess and compare the efficacy and safety of mifepristone and misoprostol combination versus misoprostol alone for second trimester termination of pregnancy in relation to induction abortion interval, average amount of misoprostol required in each group, success rate and side effects., Materials and Methods: This randomised control study was conducted on 100 women admitted in the Department of Obstetrics & Gynaecology, S.C.B. Medical College & Hospital, Cuttack, for second trimester termination of pregnancy, divided into two groups, Group A and Group B of 50 patients each. Group A patients received 200 mg of oral mifepristone followed by 400 mcg of vaginal misoprostol after 48 h, and then 400 mcg of vaginal misoprostol every 3 hourly until complete expulsion or up to a maximum of 6 doses. Group B patients received 400 mcg of vaginal misoprostol every 3 hourly until complete expulsion or up to maximum 6 doses., Results: Complete abortion was seen in 92% and 72% cases in Group A and Group B, respectively. Mean induction abortion interval was 11.59 ± 2.71 h in Group A and 15.57 ± 2.27 h in Group B ( p value < 0.001). The average dose of misoprostol required was less in combination regimen, i.e. 1128 ± 384 mcg compared to 1680 ± 302 mcg in misoprostol alone group ( p value < 0.001). Side effects like nausea, vomiting and diarrhoea were less in combination regimen than misoprostol alone group., Conclusion: Mifepristone and misoprostol combination is more effective and safer alternative than misoprostol alone in second trimester termination of pregnancy., Competing Interests: Conflicts of InterestThe authors declare that they have no conflict of interest., (© Federation of Obstetric & Gynecological Societies of India 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.)
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- 2023
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23. Potential soil organic carbon sequestration vis-a-vis methane emission in lowland rice agroecosystem.
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Das SR, Nayak BK, Dey S, Sarkar S, Chatterjee D, Saha S, Sarkar D, Pradhan A, Saha S, and Nayak AK
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- Carbon, Carbon Sequestration, Environmental Monitoring, Methane, Soil, Oryza
- Abstract
Mitigating the atmospheric greenhouse effect while enhancing the inherent soil quality and productive capacity is possible through soil carbon (C) sequestration, which has a significant potential to counteract the adverse effects of agroecosystem level C emission through natural and anthropogenic means. Although rice is the most important food in India, feeding more than 60% of the country's population, it is commonly blamed for significant methane (CH
4 ) emissions that accelerate climate change. Higher initial soil organic matter concentrations would create more CH4 under the flooded soil conditions, as reducible soil C is a prerequisite for CH4 generation. In India, rice is generally cultivated in lowlands under continuous flooding. Less extensive organic matter breakdown in lowland rice agroecosystems often significantly impacts the dynamics of soil active and passive C pools. Change from conventional to conservation agriculture might trap a significant quantity of SOC. The study aims to investigate the potential of rice-based soils to sequester C and reduce the accelerated greenhouse effects through modified farming practices, such as crop residue retention, crop rotation, organic farming, varietal selection, conservation agriculture, integrated nutrient management, and water management. Overall, lowland rice agroecosystems can sequester significant amounts of SOC, but this potential must be balanced against the potential for CH4 emissions. Management practices that reduce CH4 emissions while increasing soil C sequestration should be promoted and adopted to maximize the sustainability of rice agroecosystems. This review is important for understanding the effectiveness of the balance between SOC sequestration and CH4 emissions in lowland rice agroecosystems for adopting sustainable agricultural practices in the context of climate change., (© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)- Published
- 2023
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24. Natural Polymeric Nanobiocomposites for Anti-Cancer Drug Delivery Therapeutics: A Recent Update.
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Mondal A, Nayak AK, Chakraborty P, Banerjee S, and Nandy BC
- Abstract
Cancer is one of the most common lethal diseases and the leading cause of mortality worldwide. Effective cancer treatment is a global problem, and subsequent advancements in nanomedicine are useful as substitute management for anti-cancer agents. Nanotechnology, which is gaining popularity, enables fast-expanding delivery methods in science for curing diseases in a site-specific approach, utilizing natural bioactive substances because several studies have established that natural plant-based bioactive compounds can improve the effectiveness of chemotherapy. Bioactive, in combination with nanotechnology, is an exceptionally alluring and recent development in the fight against cancer. Along with their nutritional advantages, natural bioactive chemicals may be used as chemotherapeutic medications to manage cancer. Alginate, starch, xanthan gum, pectin, guar gum, hyaluronic acid, gelatin, albumin, collagen, cellulose, chitosan, and other biopolymers have been employed successfully in the delivery of medicinal products to particular sites. Due to their biodegradability, natural polymeric nanobiocomposites have garnered much interest in developing novel anti-cancer drug delivery methods. There are several techniques to create biopolymer-based nanoparticle systems. However, these systems must be created in an affordable and environmentally sustainable way to be more readily available, selective, and less hazardous to increase treatment effectiveness. Thus, an extensive comprehension of the various facets and recent developments in natural polymeric nanobiocomposites utilized to deliver anti-cancer drugs is imperative. The present article provides an overview of the latest research and developments in natural polymeric nanobiocomposites, particularly emphasizing their applications in the controlled and targeted delivery of anti-cancer drugs.
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- 2023
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25. Sequelae of Septic Arthritis of Hip in a Child Presenting with Acetabular Defect and Hip Dislocation: A Rare Case Report and Literature Review on Successful Treatment with Steel Osteotomy.
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Rana R, Nayak AK, Nayak M, and Patra A
- Abstract
Septic arthritis of the hip in late childhood leads to different sequelae. These cases are often missed and lead to various disabilities like hip subluxation, limb length discrepancy, and limping. The primary goal is always to reproduce a concentrically reduced stable hip. We are presenting a 13-year child with sequelae of septic arthritis of the hip with dislocation. The child had septic arthritis of the hip two years back. The patient had a superolateral acetabular defect and was treated with triple innominate steel osteotomy. The osteotomy increased the acetabular head coverage and gave a stable congruent hip to the child. Late childhood septic arthritis cases can produce acetabular defects without involving the femoral head leading to dislocation. Such cases can be effectively treated with triple innominate pelvic osteotomy, giving good head coverage with stable congruent hips., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Rana et al.)
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- 2023
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26. Assessment of Risk Factors for Enteric Fistula and Intra-Abdominal Sepsis in Patients with Open Abdomen in Trauma: An Original Research.
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Vengail S, Chandrakar D, Naik AK, Nayak AK, Mahajan A, and Dutta P
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Introduction: In emergency surgeries, open abdomen or laparostomy, especially with perforated viscus, has been used primarily to prevent delayed ventral hernia, burst abdomen, and abdominal compartment syndrome. In the present study, the clinical and resuscitative factors that are linked with open abdomen morbidity are evaluated., Material and Methods: A retrospective analysis was done for all the subjects who were admitted at the tertiary care center between May 2020 and May 2022 for the open abdomen surgeries. These patients were examined to see whether they needed more postoperative care than usual, including the need for resuscitative treatments and other critical clinical indicators. Patients were evaluated if they had any complications. The data that were collected were analysed for any variance using analysis of variance considering P <.05 as significant., Results: A total of 100 subjects were analysed in this study. Forty nine patients had intra-abdominal sepsis of the 100 cases examined from historical case records and 1 had entero-cutaneous fistulas. These patients did not necessitate additional actions for intensive care unit care, resuscitation, an chest infection, extended hospital stay, or any disabilities compared to those who did not undergo laparotomy during the same period. In this group of patients with open abdomens, the immediate postoperative period was not linked to an increase in resuscitation efforts or a load on clinical staff. Once patients are stabilized, early definitive abdominal closure is advised to prevent problems associated to laparostomies., Conclusion: The quantity of initial fluid revival and the coagulation factors at the time of admission are not related to intra-abdominal sepsis and enteric fistula following laparostomy after significant abdominal injuries., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Journal of Pharmacy and Bioallied Sciences.)
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- 2023
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27. Clinicodermoscopic and immunopathological profile of non-infectious non-eczematous inflammatory tattoo reactions: A retrospective study from a tertiary care centre of East India.
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Sethy M, Behera B, Dash S, Palit A, Nayak AK, and Ayyanar P
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- Humans, Retrospective Studies, Tertiary Care Centers, Skin, Inflammation, India epidemiology, Tattooing adverse effects
- Abstract
Introduction Tattoo-associated complications are on the rise due to the popularity of decorative tattoos in recent years. The exact pathogeneses of various tattoo reaction patterns are still unclear, and their dermoscopic details are sparsely reported. Aim We aimed to retrospectively study the clinical, dermoscopic and immunopathological details of patients with non-infectious, non-eczematous inflammatory tattoo reaction patterns in a tertiary care centre of East India. Method The clinical, dermoscopic and pathological details of all the patients who had non-infectious, non-eczematous inflammatory tattoo reactions were collected. In all the cases, immunohistochemistry was done for CD1a, CD3, CD4, CD8, FoxP3, CD20 and CD56. Results A total of five patients of skin phototypes IV and V and six tattoo reactions were analysed. Five lesions had reactions at the site of a black tattoo, and one at the site of red tattoo. Clinically, the patients presented with erythematous or blue-grey flat-topped to verrucous papules and plaques. Dermoscopic features were dominated by a central white to pink-white structureless area, a peripheral grey-white to bluish-white structureless area, white scales, comedo-like opening with keratotic plugging, milia-like cysts and shiny white structures. Pathologically, except for one lesion that only showed a lichenoid reaction pattern in the red tattoo, all had a combination of reaction patterns. Immunohistochemistry showed increased epidermal and dermal Langerhans cells, predominantly CD8 positive T cells in the epidermis and dermis, sparse dermal B cells and CD4 positive T cells, reduced T regulatory cells and a complete absence of CD56 positive NK cells. Limitations Small sample size was the limitation of the study. Conclusion The clinical morphology and dermoscopy may not differentiate between various types of non-infectious non-eczematous inflammatory tattoo reactions. The immunological profile supports a delayed hypersensitivity reaction due to contact sensitisation to tattoo pigment, and CD8 positive T cells play a central role in executing various pathological reaction patterns, both in the epidermis and dermis.
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- 2023
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28. Soil quality assessment of lowland rice soil of eastern India: Implications of rice husk biochar application.
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Munda S, Nayak AK, Shahid M, Bhaduri D, Chatterjee D, Mohanty S, Tripathi R, Kumar U, Kumar A, Khanam R, and Jambhulkar N
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The role of biochar in improving the soil properties of problem soils is well known, but its long term impact on lowland rice soil is not well recognized. The soil quality indicators of biochar applied lowland rice soil are not widely reported. We developed soil quality index (SQI) of a biochar applied lowland rice soil based on 17 soil properties (indicators). Field experimentation consisted of six treatments such as 0.5, 1, 2, 4, 8 and 10 t ha
-1 of rice husk derived biochar (RHB) along with control. An overall SQI was calculated encompassing the indicators using multivariate statistics (principal component analysis) and non-linear scoring functions after generation of minimum data set (MDS). Sequential application of RHB improved the SQI by 4.85% and 16.02% with application of 0.5 t ha-1 and 10 t ha-1 RHB, respectively, over the recommended dose of fertilizer (control). PCA-screening revealed that total organic carbon (Ctot ), zinc (Zn), pH and bulk density (BD) were the main soil quality indicators for MDS with 27.79%, 26.61%, 23.67% and 14.47% contributions, respectively. Apart from Ctot , Zn is one of the major contributors to SQI and RHB application can potentially be an effective agronomic practice to improve Zn status in lowland rice soil. The overall SQI was significantly influenced by RHB application even at 0.5 t ha-1 . The present study highlights that application of RHB improves the soil quality even in fertile, well managed, lowland rice soil., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 Published by Elsevier Ltd.)- Published
- 2023
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29. Colossal Dielectric Perovskites of Calcium Copper Titanate (CaCu 3 Ti 4 O 12 ) with Low-Iridium Dopants Enables Ultrahigh Mass Activity for the Acidic Oxygen Evolution Reaction.
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Thao NTT, Kim K, Ryu JH, An BS, Nayak AK, Jang JU, Na KH, Choi WY, Ali G, Chae KH, Akbar M, Chung KY, Cho HS, Park JH, Kim BH, and Han H
- Abstract
Oxygen evolution reaction (OER) under acidic conditions becomes of significant importance for the practical use of a proton exchange membrane (PEM) water electrolyzer. In particular, maximizing the mass activity of iridium (Ir) is one of the maiden issues. Herein, the authors discover that the Ir-doped calcium copper titanate (CaCu₃Ti₄O₁₂, CCTO) perovskite exhibits ultrahigh mass activity up to 1000 A g
Ir -1 for the acidic OER, which is 66 times higher than that of the benchmark catalyst, IrO2 . By substituting Ti with Ir in CCTO, metal-oxygen (M-O) covalency can be significantly increased leading to the reduced energy barrier for charge transfer. Further, highly polarizable CCTO perovskite referred to as "colossal dielectric", possesses low defect formation energy for oxygen vacancy inducing a high number of oxygen vacancies in Ir-doped CCTO (Ir-CCTO). Electron transfer occurs from the oxygen vacancies and Ti to the substituted Ir consequentially resulting in the electron-rich Ir and -deficient Ti sites. Thus, favorable adsorptions of oxygen intermediates can take place at Ti sites while the Ir ensures efficient charge supplies during OER, taking a top position of the volcano plot. Simultaneously, the introduced Ir dopants form nanoclusters at the surface of Ir-CCTO, which can boost catalytic activity for the acidic OER., (© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.)- Published
- 2023
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30. Arbuscular Mycorrhizal Fungi Response on Soil Phosphorus Utilization and Enzymes Activities in Aerobic Rice under Phosphorus-Deficient Conditions.
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Mitra D, Panneerselvam P, Senapati A, Chidambaranathan P, Nayak AK, and Mohapatra PKD
- Abstract
The prominence of arbuscular mycorrhizal fungi (AMF) in sustainable rice production has long been recognized. However, there is little information about AMF response in aerobic rice cultivation under phosphorus (P)-deficient conditions. The aim of this experiment was to compare and determine the preeminent AMF effects on rice mycorrhizal colonization, responsiveness, P utilization, and different growth-promoting traits under P-deficient conditions. Different AMF genera viz . ( Funneliformis sp., Rhizophagus sp., Glomus sp., Acaulospora sp., and Claroideoglomus sp.) in four different aerobic rice varieties developed by ICAR-NRRI, India (CR Dhan 201, CR Dhan 204, CR Dhan 205, and CR Dhan 207) were investigated using the check P-susceptible variety (IR 36) and the P-tolerant variety (Kasalath IC459373). Data analyzed through linear modeling approaches and bivariate associations found that AMF colonization was highly correlated with soil enzymes, particularly fluorescein diacetate (FDA) and plant P uptake. The microbial biomass carbon (MBC) and FDA content were significantly changed among rice varieties treated with AMF compared to uninoculated control. Out of four different rice varieties, CR Dhan 207 inoculated with AMF showed higher plant P uptake compared to other varieties. In all the rice varieties, AMF colonization had higher correlation coefficients with soil enzymes (FDA), MBC, and plant P uptake than uninoculated control. The present study indicates that AMF intervention in aerobic rice cultivation under P-deficient conditions significantly increased plant P uptake, soil enzymes activities and plant growth promotion. Thus, the information gathered from this study will help us to develop a viable AMF package for sustainable aerobic rice cultivation.
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- 2023
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31. Multi-criteria assessment to screen climate smart rice establishment techniques in coastal rice production system of India.
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Mohapatra KK, Nayak AK, Patra RK, Tripathi R, Swain CK, Moharana KC, Kumar A, Shahid M, Mohanty S, Garnaik S, Nayak HS, Mohapatra S, Nagothu US, and Tesfai M
- Abstract
Introduction: Conventional rice production techniques are less economical and more vulnerable to sustainable utilization of farm resources as well as significantly contributed GHGs to atmosphere., Methods: In order to assess the best rice production system for coastal areas, six rice production techniques were evaluated, including SRI-AWD (system of rice intensification with alternate wetting and drying (AWD)), DSR-CF (direct seeded rice with continuous flooding (CF)), DSR-AWD (direct seeded rice with AWD), TPR-CF (transplanted rice with CF), TPR-AWD (transplanted rice with AWD), and FPR-CF (farmer practice with CF). The performance of these technologies was assessed using indicators such as rice productivity, energy balance, GWP (global warming potential), soil health indicators, and profitability. Finally, using these indicators, a climate smartness index (CSI) was calculated., Results and Discussion: Rice grown with SRI-AWD method had 54.8 % higher CSI over FPR-CF, and also give 24.5 to 28.3% higher CSI for DSR and TPR as well. There evaluations based on the climate smartness index can provide cleaner and more sustainable rice production and can be used as guiding principle for policy makers., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Mohapatra, Nayak, Patra, Tripathi, Swain, Moharana, Kumar, Shahid, Mohanty, Garnaik, Nayak, Mohapatra, Nagothu and Tesfai.)
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- 2023
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32. A Study on Serum Lactate Dehydrogenase and Uric Acid in Preeclampsia and Eclampsia: Can they Predict Adverse Fetomaternal Outcome?
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Moharana JJ, Mishra R, and Nayak AK
- Abstract
Background: Hypertensive disorders of pregnancy affect 3%-5% of all pregnancies, contributing immensely to maternal morbidity and mortality. According to the WHO, the incidence of deaths due to preeclampsia and eclampsia in developing and developed countries is 2.8% and 0.4%, respectively. Lactate dehydrogenase (LDH) and uric acid are good predictors of disease severity., Aim: This study aims to determine the fetomaternal outcome in relation to abnormal serum levels of LDH and uric acid., Materials and Methods: A cross-sectional study was carried out in 1200 patients with preeclampsia and eclampsia at a tertiary care center over 2 years. Patients were divided into - Group A: patients with normal LDH (≤300 IU/L) and uric acid (<6 mg/dl) ( n = 300). Group B: patients with abnormal LDH and uric acid ( n = 900), who were further divided into mild and severe preeclampsia and eclampsia. Abnormal serum values were stratified into groups for easier comparison. The results were compared in terms of maternal and perinatal outcomes., Results: The incidence of preeclampsia and eclampsia in our study is 3.14% and 1.57%, respectively. Significant changes in LDH and uric acid were associated with increased severity of the disease (LDH - 1116.94 ± 4.78; uric acid - 9.2 ± 2.89). Higher incidence of maternal and fetal complications was seen with severe preeclampsia and eclampsia with LDH >800 IU/L and uric acid >6 mg/dl., Conclusion: Standard antenatal follow-up should be carried out for early detection and prevention of preeclampsia, with strict monitoring of serum uric acid level and LDH. This may reduce the maternal and fetal complications due to preeclampsia., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 International Journal of Applied and Basic Medical Research.)
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- 2023
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33. Fluoride risk assessment from agricultural soils in India: a study based on vertical, spatial and geochemical distribution.
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Jha SK, Sharma YK, Nayak AK, Deepak, and Devanand
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- Humans, Adult, Fluorides analysis, Environmental Monitoring methods, Agriculture, Risk Assessment, Soil, Soil Pollutants analysis
- Abstract
Fluoride (F) in agricultural soil is increasing continuously due to injudicious application of F-laden fertilizers, causing global concern about fluorosis disease. The objective of the study was to assess F risk in humans due to soil ingestion, dermal contact, and particulate inhalation during various agricultural activities. The study also emphasized chemical fractionation, distribution, and geochemical understanding of high F incidence. Agricultural surface soil was sampled randomly from 5 km × 5 km square grids besides soil profile samples for studying the vertical distribution of F. Various F fractions in soil (1:1 soil:water ratio, calcium chloride extractable F, hot water soluble F, exchangeable F, Fe-Mn oxide bound F, organic matter bound F, residual F, and total F) were estimated using the sequential fractionation method. Multivariate geochemical analysis and soil F risk were also assessed in humans. The water soluble F (F
1:1 ) and CaCl2 extractable F (FCa ) varied between 0.11 to 6.73 mg kg-1 and 1.02 to 6.94 mg F kg-1 soil, respectively. Total fluoride (TF) however, ranged between 115 to 456 mg F kg-1 . A higher average of FCa /TF moving down the soil profile indicated a propensity for F endemicity. Weathering, ion-exchange, alkalinity, and clay were found to control the soil geochemistry of the area. The F contamination index explained > 82% variance of F contamination, but the hazard quotient of F for an adult was found < 1, indicating no potential fluorosis risk in the area. This study is the first of its kind in India, where ecological risk due to F from agricultural soil was assessed in humans and will be a benchmark for future researchers., (© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)- Published
- 2023
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34. A state-of-the-art review on cadmium uptake, toxicity, and tolerance in rice: From physiological response to remediation process.
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Peera Sheikh Kulsum PG, Khanam R, Das S, Nayak AK, Tack FMG, Meers E, Vithanage M, Shahid M, Kumar A, Chakraborty S, Bhattacharya T, and Biswas JK
- Subjects
- Humans, Cadmium toxicity, Cadmium analysis, Soil chemistry, Agriculture, Biodegradation, Environmental, Oryza chemistry, Soil Pollutants analysis
- Abstract
Cadmium (Cd), a major contaminant of concern, has been extensively reviewed and debated for its anthropogenic global shifts. Cadmium levels in rice grains raise wide food safety concerns. The aim of this review is therefore to capture the dynamics of Cd in paddy soil, translocation pathways of Cd from soil to consumption rice, and assess its bio-accessibility in human consumption. In crop plants, Cd reduces absorption of nutrients and water, triggers oxidative stress, and inhibits plant metabolism. Understanding the mechanisms and behaviour of Cd in paddy soil and rice allows to explain, predict and intervene in Cd transferability from soil to grains and human exposure. Factors affecting Cd movement in soil, and further to rice grain, are elucidated. Recently, physiological and molecular understanding of Cd transport in rice plants have been advanced. Morphological-biochemical characteristics and Cd transporters of plants in such a movement were also highlighted. Ecologically viable remediation approaches, including low input cost agronomic methods, phytoremediation and microbial bioremediation methods, are emerging., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)
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- 2023
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35. Thermal plasma processing of Moringa oleifera biochars: adsorbents for fluoride removal from water.
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Gourai M, Nayak AK, Nial PS, Satpathy B, Bhuyan R, Singh SK, and Subudhi U
- Abstract
Anthropogenic activities accelerate fluoride contamination in groundwater, which largely affects public health. Though biochars have been explored for defluoridation, the plasma technology-based production of biochars has not received as considerable attention as other methods and it is also important that biochars be tested on groundwater samples. In the present study, for the first time, we report the preparation of biochars from different parts of Moringa oleifera using thermal plasma processing and demonstrate fluoride adsorption in both synthetic and contaminated groundwater. Water samples were collected from different locations in Nuapada district of Odisha such as Kotamal-Makardampada (20°24'46''N 82°37'19''E), Pandrapathar (20°34'41''N 82°39'25''E), Karlakot-Kadobhata (20°22'52''N 82°37'24''E), Kotamal-Jhakarpada (20°24'35''N 82°37'20''E), and Dohelpada (20°33'50''N 82°38'57''E). The Moringa leaf samples are processed at 1600 °C for 3 min in an inert atmosphere under a continuous flow of argon to get suitable biochars. The plasma-synthesized biochars contain larger exposed surfaces, which are efficient for the adsorption of fluoride. The prepared biochars were highly porous, amorphous, and contain > 72% carbon, which increases the efficiency of defluoridation due to the surface adsorbate site exposed. XRD of the samples showed the presence of calcium hydroxide, magnesium oxide, and calcium oxide, and large peaks of carbon. Raman data showed the double bond of carbon with oxygen in the form of carbonyl bonds, thioether, and sulfhydryl bonds, which contribute to the protonated site for the adsorption of fluoride, and assist in water penetration and swelling of biochars. The biochar of Moringa oleifera is very efficient for the adsorption of fluoride from standard samples as well as groundwater samples up to a concentration of 6 ppm. Conclusively, the present investigation shows that Moringa oleifera leaves are a good alternative adsorbent that could be used for the removal of fluoride from groundwater samples with > 85% removal in 18 h using 1 g biochar for 100 mL or 10 g biochar for 1 L water containing 4 ppm fluoride. To our knowledge, this is the first report on the thermal plasma-based production of Moringa biochars for the removal of fluoride from drinking water., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (This journal is © The Royal Society of Chemistry.)
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- 2023
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36. Sequential outbreaks due to mixed ctxB alleles of Vibrio cholerae O1 in Mayurbhanj district of Odisha, India.
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Pal BB, Nayak AK, Nayak SR, and Pany S
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- Humans, Alleles, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents therapeutic use, Disease Outbreaks, Genotype, Diarrhea drug therapy, India epidemiology, Cholera Toxin genetics, Vibrio cholerae O1 genetics, Cholera epidemiology
- Abstract
Introduction: Cholera is a significant threat causing outbreaks/epidemics with high morbidity and mortality in coastal and tribal districts of Odisha. A sequential cholera outbreak reported from four places in Mayurbhanj district of Odisha during June to July 2009 was investigated., Methodology: Rectal swabs from diarrhea patients were analyzed for the identification, antibiogram profiles and detection of ctxB genotypes by double mismatch amplification mutation (DMAMA) polymerase chain reaction (PCR) assays and sequenced. The different virulent and drug resistant genes were detected by multiplex PCR assays. The clonality analysis on selected strains was done by pulse field gel electrophoresis (PFGE)., Results: Bacteriological analysis of rectal swabs revealed the presence of V. cholerae O1 Ogawa biotype El Tor which were resistant to co-trimoxazole, chloramphenicol, streptomycin, ampicillin, nalidixic acid, erythromycin, furazolidone and polymyxin B. DMAMA-PCR assay revealed that the cholera outbreak in Mayurbhanj district was due to both ctxB1 and ctxB7 alleles of V. cholerae O1 El Tor strains. All the V. cholerae O1 strains were positive for all virulence genes. The multiplex PCR assay on V. cholerae O1 strains revealed the presence of antibiotic resistance genes like dfrA1 (100%), intSXT (100%), sulII (62.5%) and StrB (62.5%). PFGE results on V. cholerae O1 strains exhibited two different pulsotypes with 92% similarity., Conclusions: This outbreak was a transition phase where both ctxB genotypes were prevalent after which the ctxB7 genotype gradually became dominant in Odisha. Therefore, close monitoring and continuous surveillance on diarrheal disorders is essential to prevent the future diarrheal outbreaks in this region., Competing Interests: No Conflict of Interest is declared, (Copyright (c) 2023 Bibhuti Bhusan Pal, Ashish Kumar Nayak, Smruti Ranjan Nayak, Swatishree Pany.)
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- 2023
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37. Anthropometric Analysis of Distal Femur Parameters in the Eastern Uttar-Pradesh Population.
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Nayak AK, Sahni C, Gupta M, Tiwari PK, Mishra A, and Devadas D
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Introduction: Anthropometric measurements of the distal femoral fragment play a crucial role in prosthesis design during arthroplastic knee surgeries and offer valuable clues for stature estimation in forensic investigations. The present study is an attempt to assess various anthropometric parameters of the distal femur in this regard., Materials and Methods: A total of 96 intact dry femora were anthropometrically assessed using digital Vernier calipers. The femoral length was measured using an osteometric table. The torsion angle was calculated with an analog goniometer. The various parameters studied included: medial condyle length and thickness, lateral condyle length and thickness, bicondylar width, intercondylar width, intercondylar depth, torsional angle, and femoral length. The data obtained were statistically analyzed using SPSS software (IBM Corp., Armonk, NY, USA)., Results: Mean medial condyle length was 57.38±4.47mm and thickness was 24.53±2.27mm. Mean lateral condyle length and thickness were found to be 58.49±4.3mm and 25.33±3.15mm respectively. Mean bicondylar width was 71.96±6.73mm, mean intercondylar width 21.86±2.71mm, and the intercondylar depth 27.04±2.59mm respectively. The average femur length was 41.87±3.31mm and the average torsion angle was 20.19°±6.99°. Significant correlations were observed between distal femoral parameters. Lateral condyle length showed maximum correlation with other parameters. Femur length was found to correlate significantly with all parameters except medial condyle thickness. Torsion angle was significantly correlated with lateral condyle length and femur length only., Discussion: The findings of this study show considerable variation from those of other studies done within India. This proves that distal femoral anthropometry has regional variations. These data can aid sports physicians and orthopedic surgeons with implant designing and forensic experts during investigations., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Nayak et al.)
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- 2023
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38. Perception and determinants leading to antimicrobial (mis)use: A knowledge, attitude, and practices study in the rural communities of Odisha, India.
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Pattnaik M, Nayak AK, Karna S, Sahoo SK, Palo SK, Kanungo S, Kshatri JS, Parai D, Walia K, Singh T, Choudhary HR, Pati S, and Bhattacharya D
- Subjects
- Humans, Cross-Sectional Studies, Health Knowledge, Attitudes, Practice, Anti-Bacterial Agents therapeutic use, Perception, Quality of Life, Rural Population
- Abstract
Background: Antimicrobial resistance (AMR) has emerged as one of the major public health issues globally. This cross-sectional study determined knowledge, attitudes and practices (KAP) regarding antimicrobial use and AMR among rural communities of Tigiria (Odisha), India., Methods: A semi-structured questionnaire based on socio-demographic characteristics, antibiotics usage, awareness of antimicrobial resistance, healthcare utilization and quality of life were asked to the participants using an electronic device with Open Data Kit. Descriptive statistics, independent t -test and ANOVA were performed to analyze the variables., Results: A total of 1,003 participants were surveyed in the study from 25 villages of Tigiria. About 44.47% (95% CI: 41.36-47.60) of study participants have heard about antimicrobial medicines and 14.75% (95% CI: 12.65-17.13) of participants were involved in buying antibiotics without prescription over the counter. Around 20.14% (95% CI: 17.72-22.78) of participants, stopped taking antibiotics before completing the full course. The physical domain was the most affected with low scores compared to other domains of quality of life (QOL). The QOL scores were found significant ( p < 0.05) across age, gender, education and ethnicity., Conclusion: The study documented a significant level of KAP regarding antimicrobial (mis)use in the study. It is essential that antimicrobial stewardship programs for various stakeholders and educational programmes must be initiated to increase awareness of people on antimicrobial resistance., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Pattnaik, Nayak, Karna, Sahoo, Palo, Kanungo, Kshatri, Parai, Walia, Singh, Choudhary, Pati and Bhattacharya.)
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- 2023
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39. Degradation of mixed cationic dye pollutant by metal free melem derivatives and graphitic carbon nitride.
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Rani B, Nayak AK, and Sahu NK
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- Graphite, Heterocyclic Compounds, 3-Ring, Metals, Methylene Blue, Nitrogen Compounds, Triazines, Coloring Agents, Environmental Pollutants
- Abstract
Graphitic carbon nitride (GCN), a polymeric metal free catalyst is widely used to degrade the toxic organic dye from the aqueous pollution. However, its catalytic efficiency and effective simultaneous reduction of mixed dye is still a challenge. Here, we have tuned the physiochemical properties of the GCN and melem derivatives by facilely tuning the degree of polycondensation and examined their catalytic activity towards the removal of cationic dye individually and together in solution. Catalysts were synthesized by thermal treatment of low-cost melamine and characterized by XRD, FTIR, RAMAN, FE-SEM, EDX, UV-DRS, and FL spectroscopy to confirm materials' structure, phase, morphology and optical properties. A suitable phase of the catalyst (M-450) exhibited superior removal capacity with a high-rate constant compared to others. The results demonstrate that M-450 has a maximum loading efficacy of 2.13 and 1.12 mg g
-1 for methylene blue (MB) and Rhodamine B (RhB) dyes respectively in a single dye system. Attractively, when MB and RhB co-exist in the solution, the efficacy increased by 14% (2.44 mg g-1 ) and 27% (1.43 mg g-1 ) for MB and RhB respectively. The adsorption kinetics, stability, effect of pH and reusability of M-450 catalyst was testified. Further, radical scavenger experiments and terephthalic acid tests were carried out to explain the reaction mechanism involved in the degradation of textile dyes. Moreover, electron paramagnetic resonance (EPR) analysis validated the availability of hydroxyl radicals in the photocatalytic reaction. Excellent stability and reusability were attained even after five successive cycles, demonstrating a suitable photocatalyst for the efficient degradation of mixed dye., (Copyright © 2022 Elsevier Ltd. All rights reserved.)- Published
- 2022
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40. Study of Association of Global Deoxyribonucleic Acid Methylation in Women with Polycystic Ovary Syndrome.
- Author
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Ray RP, Padhi M, Jena S, Patnaik R, Rattan R, and Nayak AK
- Abstract
Background: Polycystic ovary syndrome (PCOS), a common endocrine disorder affecting 5%-10% of reproductive age women worldwide, associated with various metabolic morbidities. One potential molecular mechanism could be epigenetic modifications, such as deoxyribonucleic acid (DNA) methylation., Aims: The aim is to determine the association of global DNA methylation in peripheral blood leucocyte (PBL) cells and PCOS women. Also to assess abnormal lipid profile, insulin resistance, gonadotropins and reproductive markers in them., Settings and Design: The study design involves a hospital-based prospective case-control study., Materials and Methods: Fifty women with PCOS, diagnosed as per Rotterdam criteria and the rest 50 without PCOS or any disease, attending outpatient department were recruited. Serum biochemical markers and Global DNA methylation assay were done by using standardised kit., Statistical Analysis Used: Data were compared using Independent t -test or Mann-Whitney U test using IBM SPSS version 26.0. P < 0.05 was considered statistically significant., Results: Majority, 72% of PCOS and 82% non-PCOS women were between 20 and 25 years. Most common presenting symptom was menstrual irregularity. Women with PCOS have high serum cholesterol and triglyceride level, elevated serum luteinising hormone (LH), follicle-stimulating hormone (FSH), LH/FSH ratio and testosterone but low estradiol levels as compared to non-PCOS. Statistically significant high mean Global DNA methylation percentage was found in PBLs of women with PCOS., Conclusion: Despite study limitations, this study provided insight into Global DNA methylation in PBLs was associated with PCOS. It requires further research to better understand the influence of epigenetic factors including genome-wide DNA methylation profiling in PCOS development., Competing Interests: There are no conflicts of interest., (Copyright: © 2022 Journal of Human Reproductive Sciences.)
- Published
- 2022
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41. Adsorption of As(III) and As(V) from aqueous solution by magnetic biosorbents derived from chemical carbonization of pea peel waste biomass: Isotherm, kinetic, thermodynamic and breakthrough curve modeling studies.
- Author
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Sahu N, Nayak AK, Verma L, Bhan C, Singh J, Chaudhary P, and Yadav BC
- Subjects
- Adsorption, Biomass, Hydrogen-Ion Concentration, Kinetics, Magnetic Phenomena, Pisum sativum, Spectroscopy, Fourier Transform Infrared, Thermodynamics, Water, Arsenic chemistry, Water Pollutants, Chemical chemistry
- Abstract
The purpose of this research was to investigate the adsorption of arsenic (As) from aqueous solutions using MPAC-500 and MPAC-600 (magnetic-activated carbons synthesized from the peel of Pisum sativum (pea) pyrolyzed at 500
° C and 600° C temperatures, respectively). The potential of both biosorbents for As adsorption was determined in batch and column mode. The characterization of both biosorbents was performed by energy dispersive spectroscopy, scanning electron microscope, pHZPC , particle size distribution, X-ray diffraction, zeta potential and Fourier-transform infrared spectroscopy. It was found that the efficiency of MPAC-600 was better than MPAC-500 for the adsorption of As(III) and As(V) ions. The adsorption capacities of MPAC-500 and MPAC-600 in removing As(III) were 0.7297 mg/g and 1.3335 mg/g, respectively, while the values of Qmax for As(V) on MPAC-500 and MPAC-600 were 0.4930 mg/g and 0.9451 mg/g, respectively. The Langmuir isotherm model was found to be the best fit for adsorption of As(III) by MPAC-500 and MPAC-600, as well as adsorption of As(V) by MPAC-500. The Freundlich isotherm model, on the other hand, was optimal for As(V) removal with MPAC-600. With R2 values close to unity, the pseudo-second-order kinetics were best fitted to the adsorption process of both As species. The Thomas model was used to estimate the breakthrough curves. The effects of coexisting oxyanions and regeneration studies were also carried out to examine the influence of oxyanions on As adsorption and reusability of biosorbents., (Copyright © 2022 Elsevier Ltd. All rights reserved.)- Published
- 2022
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42. Clinico-Dermoscopic-Pathological Features of a Rare Case of Locally Invasive Multifocal Primary Cutaneous Diffuse Large B Cell Lymphoma-Leg Type Over the Face and Scalp.
- Author
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Behera B, Palit A, Nayak AK, Panigrahi A, Mishra P, and Sethy M
- Abstract
Primary cutaneous diffuse large B-cell lymphoma-leg type (PCDLBCL-LT) is characterized by diffuse monotonous proliferation of centroblasts and immunoblasts. It commonly presents as erythematous to violaceous nodules on one or both the legs and has a poor prognosis. We report the clinico-dermoscopic-pathological features and therapeutic response of a rare case of PCDLBCL-LT in a 62-year-old diabetic man, who presented with multifocal plaques, one lobulated and two arcuate-shaped, on the face and scalp. During the investigation, one of the plaques had eroded the underlying bone without any evidence of malignant cells in the cerebrospinal fluid. He was successfully treated with R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) along with intrathecal methotrexate., Competing Interests: There are no conflicts of interest., (Copyright: © 2022 Indian Journal of Dermatology.)
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- 2022
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43. An Unusual Clinico-Dermoscopic-Pathological Presentation of Necrobiosis Lipoidica in a Nondiabetic, Hypothyroid Woman.
- Author
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Behera B, Nayak AK, Palit A, Mitra S, Sethy M, and Ayyanar P
- Abstract
Competing Interests: There are no conflicts of interest.
- Published
- 2022
- Full Text
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44. Unraveling Variations in Celiac Trunk and Hepatic Artery by CT Angiography to Aid in Surgeries of Upper Abdominal Region.
- Author
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Malviya KK, Verma A, Nayak AK, Mishra A, and More RS
- Abstract
Understanding of variations in the course and source of abdominal arteries is crucial for any surgical intervention in the peritoneal space. Intricate surgeries of the upper abdominal region, such as hepato-biliary, pancreatic, gastric and splenic surgeries, require precise knowledge of regular anatomy and different variations related to celiac trunk and hepatic artery. In addition, information about the origin of inferior phrenic artery is important in conditions such as hepatocellular carcinoma and gastroesophageal bleeding management. The present study gives an account of anatomical variations in origin and branching pattern of celiac trunk and hepatic artery by the use of CT (computed tomographic) angiography. The study was performed on 110 (66 females and 44 males) patients in a north Indian population. Results unraveled the most common celiac trunk variation as hepatosplenic trunk with left gastric artery, which was observed in 60% of cases, more common in females than in males. Gastrosplenic and hepato-gastric trunk could be seen in 4.55% and 1.82% cases respectively. Gastrosplenic trunk was more commonly found in females, whereas hepato-gastric trunk was more common in males. A gastrosplenic trunk, along with the hepato-mesenteric trunk, was observed in 1.82% cases and was more common in males. A celiacomesenteric trunk, in which the celiac trunk and superior mesenteric artery originated as a common trunk from the aorta, was seen only in 0.91% of cases, and exhibited an origin of right and left inferior phrenic artery from the left gastric artery. The most common variation of hepatic artery, in which the right hepatic artery was replaced and originated from the superior mesenteric artery, was observed in 3.64%, cases with a more common occurrence in males. In 1.82% cases, the left hepatic artery was replaced and originated from the left gastric artery, which was observed only in females. Common hepatic artery originated from the superior mesenteric artery, as observed in 1.82% cases, with slightly higher occurrence in males. These findings not only add to the existing knowledge apart from giving an overview of variations in north Indian population, but also give an account of their correlation with gender. The present study will prove to be important for various surgeries of the upper abdominal region.
- Published
- 2021
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45. Variants of ctxB alleles of Vibrio cholerae O1 caused sequential cholera outbreaks in the tribal areas of Odisha, India.
- Author
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Pal BB, Nayak SR, Nayak AK, Behera DR, Pany S, and Pati S
- Subjects
- Alleles, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents therapeutic use, Cholera Toxin genetics, Disease Outbreaks, Genotype, Humans, India epidemiology, Cholera epidemiology, Vibrio cholerae O1 genetics
- Abstract
Cholera localized outbreaks/epidemics accounting for high morbidity and mortality have been reported in different years both from the coastal and tribal districts of Odisha. In the present study, the emergence and spread of two sequential cholera outbreaks reported in July to October 2012 from Rayagada and Kalahandi districts of Odisha was investigated. Environmental water samples from different sources and rectal swabs from diarrhoea patients were analysed for identification, antibiogram profiles and molecular studies using DMAMA-PCR assays. The pulsed field gel electrophoresis (PFGE) was done on some selected Vibrio cholerae O1 strains isolated from these cholera outbreak areas. Results showed 42% of rectal swabs and 2.3% of water samples collected from both the districts were positive for Vibrio cholerae O1 Ogawa biotype El Tor carrying both ctxB1 and ctxB7 genotypes. The common resistance profile of V. cholerae O1 strains was ampicillin, nalidixic acid, furazolidone and co-trimoxazole. The PFGE analysis on selected V. cholerae O1 strains of ctxB1 and ctxB7 genotypes showed three pulsotypes with 96% similarity matrix exhibiting the relationship with their respective water sources. Hence, continuous surveillance is highly essential to monitor the antibiogram profile and changing pattern of ctxB genotypes of V. cholerae O1 in this region.
- Published
- 2021
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46. Origin and Dissemination of Altered El Tor Vibrio cholerae O1 Causing Cholera in Odisha, India: Two and Half Decade's View.
- Author
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Pal BB, Behera DR, Nayak SR, and Nayak AK
- Abstract
The origin, spread and molecular epidemiology of altered El Tor Vibrio cholerae O1 strains isolated from cholera outbreaks/surveillance studies between 1995 and 2019 from different district of Odisha were analyzed. The stock cultures of V. cholerae O1 strains from 1995 to 2019 were analyzed through molecular analysis using different PCR assays and pulse field gel electrophoresis (PFGE) analysis. The spread map (month, year and place) was constructed to locate the dissemination of altered El Tor variants of V. cholerae O1 in this region. A total of 13 cholera outbreaks were caused by V. cholerae O1 Ogawa biotype El Tor carrying ctxB1 and ctxB7 genotypes. The ctxB1 alleles of V. cholerae O1 mostly confined to the coastal areas, whereas the ctxB7 genotypes, though originating in the coastal region of Odisha, concentrated more in the tribal areas. The positive correlation between virulence-associated genes (VAGs) was found through Pearson's correlation model, indicative of a stronger association between the VAGs. The clonal relationship through PFGE between ctxB1 and ctxB7 genotypes of V. cholerae O1 strains exhibited 80% similarity indicating single- or multi-clonal evolution. It is evident from this study that the spread of multidrug-resistant V. cholerae O1-altered El Tor was dominant over the prototype El Tor strains in this region. The origin of altered El Tor variants of V. cholerae O1 occurred in the East Coast of Odisha established that the origin of cholera happened in the Gangetic belts of Bay of Bengal where all new variants of V. cholerae O1 might have originated from the Asian countries., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The reviewer PK declared a shared affiliation with the authors to the handling editor at the time of the review, (Copyright © 2021 Pal, Behera, Nayak and Nayak.)
- Published
- 2021
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47. Preparation and Evaluation of Silymarin-Loaded Solid Eutectic for Enhanced Anti-Inflammatory, Hepatoprotective Effect: In Vitro - In Vivo Prospect.
- Author
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Sherikar A, Siddique MUM, More M, Goyal SN, Milivojevic M, Alkahtani S, Alarifi S, Hasnain MS, and Nayak AK
- Subjects
- Animals, Carrageenan toxicity, Central Nervous System Depressants toxicity, Chemical and Drug Induced Liver Injury etiology, Chemical and Drug Induced Liver Injury metabolism, Chemical and Drug Induced Liver Injury pathology, Edema chemically induced, Edema metabolism, Edema pathology, Male, Rats, Rats, Wistar, Anti-Inflammatory Agents pharmacology, Carbon Tetrachloride toxicity, Chemical and Drug Induced Liver Injury drug therapy, Edema drug therapy, Ethanol toxicity, Protective Agents pharmacology, Silymarin pharmacology
- Abstract
Solubility of phytochemicals is a major concern for drug delivery, permeability, and their biological response. However, advancements in the novel formulation technologies have been helping to overcome these challenges. The applications of these newer technologies are easy for commercialization and high therapeutic outcomes compared to conventional formulations. Considering these facts, the present study is aimed to prepare a silymarin-loaded eutectic mixture with three different ratios of Polyvinylpyrrolidone K30 (PVP K30) and evaluating their anti-inflammatory, and hepatoprotective effects. The preliminary phytochemical and characterization of silymarin, physical mixture, and solid dispersions suggested and successfully confirmed the formation of solid dispersion of silymarin with PVP K30. It was found that the solubility of silymarin was increased by 5-fold compared to pure silymarin. Moreover, the in vitro dissolution displayed that 83% of silymarin released within 2 h with 2.8-fold increase in dissolution rate compared to pure silymarin. Also, the in vivo study suggested that the formulation significantly reduced the carbon tetrachloride- (0.8620 ± 0.05034
∗∗ for 1 : 3 ratio), paracetamol- (0.7300 ± 0.01517∗∗ for 1 : 3 ratio), and ethanol- (0.8100 ± 0.04037∗∗ for 1 : 3 ratio) induced hepatotoxicity in rats. Silymarin solid dispersion was prepared using homogenization methods that have prominent anti-inflammatory effect (0.6520 ± 0.008602∗∗ with 8.33%) in carrageenan-induced rat paw model., Competing Interests: All the authors of this research article have declared that they have no competing financial or personal conflict of interest., (Copyright © 2021 Abdulla Sherikar et al.)- Published
- 2021
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48. Evaluation of spatial spreading of phyto-available sulphur and micronutrients in cultivated coastal soils.
- Author
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Shukla AK, Behera SK, Tripathi R, Prakash C, Nayak AK, Kumar PS, Chitdeshwari T, Kumar D, Nayak RK, Babu PS, Katkar RN, Subbarayappa CT, Moharana KC, Patra AK, Srinivasarao C, Chaudhari SK, Rao AS, Singh AK, and Das S
- Subjects
- Agriculture, Geography, India, Statistics as Topic, Micronutrients analysis, Soil chemistry, Sulfur analysis
- Abstract
Understanding the spatial spreading patterns of plant-available sulphur (S) (AS) and plant-available micronutrients (available zinc (AZn), available iron (AFe), available copper (ACu), available manganese (AMn) and available boron (AB)) in soils, especially in coastal agricultural soils subjected to various natural and anthropogenic activities, is vital for sustainable crop production by adopting site-specific nutrient management (SSNM) strategies. We studied the spatial distribution patterns of AS, AZn, AFe, ACu, AMn, and AB in cultivated soils of coastal districts of India using geostatistical approaches. Altogether 39,097 soil samples from surface (0 to 15 cm depth) layers were gathered from farm lands of 68 coastal districts. The analysis of soil samples was carried out for soil pH, electrical conductivity (EC), soil organic carbon (SOC) and AS, AZn, AFe, ACu, AMn, and AB. Soil pH, EC and SOC varied from 3.70 to 9.90, 0.01 to 7.45 dS m-1 and 0.02 to 3.74%, respectively. The concentrations of AS, AZn, AFe, ACu, AMn, and AB varied widely in the study area with their corresponding mean values were 37.4±29.4, 1.50±1.53, 27.9±35.1, 2.14±1.74, 16.9±18.4 and 1.34±1.52 mg kg-1, respectively. The coefficient of variation values of analyzed soil parameters varied from 14.6 to 126%. The concentrations of AS, AZn, AFe, ACu, AMn, and AB were negatively and significantly correlated with soil pH and positively and significantly correlated with SOC. The geostatistical analysis indicated stable, Gaussian and exponential best-fit semivariogram models with moderate to strong spatial dependence for available nutrients. The generated spatial spreading maps revealed different distribution patterns for AS, AZn, AFe, ACu, AMn, and AB. There were variations in spatial spreading patterns of AS, AZn, AFe, ACu, AMn, and AB in east- and west-coastal area. About 62, 35, 12, 0.4, 23 and 45% of the study area had deficiency of AS, AZn, AFe, ACu, AMn, and AB, respectively. The spatial spreading maps will be highly useful for SSNM in the cultivated coastal soils of the country. This study could also be used as a base for assessing spatial spreading patterns of soil parameters in cultivated coastal areas of other parts of the world., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2021
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49. Combined application of ascorbic acid and endophytic N-fixing Azotobacter chroococcum Avi2 modulates photosynthetic efficacy, antioxidants and growth-promotion in rice under moisture deficit stress.
- Author
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Kumar U, Kaviraj M, Rout S, Chakraborty K, Swain P, Nayak PK, and Nayak AK
- Subjects
- Antioxidants pharmacology, Chlorophyll analysis, Chlorophyll metabolism, Endophytes physiology, Oryza genetics, Oryza growth & development, Oxidation-Reduction, Plant Leaves chemistry, Plant Leaves metabolism, Plant Roots drug effects, Plant Roots metabolism, Stress, Physiological drug effects, Ascorbic Acid pharmacology, Azotobacter physiology, Nitrogen Fixation, Oryza drug effects, Oryza microbiology, Photosynthesis drug effects, Water
- Abstract
This group has previously reported the role of ascorbic acid (AA) as an antioxidant for survivability and ability to enhancing diazotrophic efficacy in Azotobacter chroococcum Avi2 under hydrogen peroxide (H
2 O2 ) stress. However, the present study showed the combined application of AA and Avi2 in drought-susceptible (IR64 and Naveen) and drought-tolerant (Ankit and Satyabhama) rice cultivars to determine their photosynthetic efficacy (chlorophyll fluorescence-imaging), antioxidants, and plant growth-promotion (PGP) under moisture deficit stress (MS, -60 kPa). The results indicated that combined application of AA and Avi2 significantly (p < 0.05) increased the total chlorophyll, relative water content, electrolytic leakage, super oxide dismutase, and catalase activities in all rice cultivars as compared to other MS treatments, whereas stress indicators like proline and H2 O2 contents were proportionally increased under MS and their concentration were normalized under combined application of AA and Avi2. Photochemical quenching, non-photochemical quenching, photosynthetic electron transport rate, and the effective quantum efficiency were found to be increased significantly (p < 0.05) in Avi2 + AA as compared to other MS treatments. Moreover, rice roots harbored significantly (p < 0.05) higher copy number of nifH gene in Avi2 + AA treatment followed by Avi2 compared to flooded control and other MS treatments. Combined application of AA and Avi2 also increased the grain yield significantly (p < 0.05) by 7.09 % and 3.92 % in drought-tolerant (Ankit and Satyabhama, respectively) and 31.70 % and 34.19 % in drought-susceptible (IR64 and Naveen, respectively) rice cultivars compared to MS treatment. Overall, the present study indicated that AA along with Avi2 could be an effective formulation to alleviate MS vis à vis enhances PGP traits in rice., (Copyright © 2021 Elsevier GmbH. All rights reserved.)- Published
- 2021
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50. New generation post-emergence herbicides and their impact on arbuscular mycorrhizae fungal association in rice.
- Author
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Panneerselvam P, Saha S, Senapati A, Nayak AK, Kumar U, and Mitra D
- Abstract
To prevent weed invasion in direct seeded rice cultivation, several new generation post emergence herbicides viz. bispyribac sodium, flucetosulfuron, ethoxysulfuron, fenoxaprop-p ethyl, penoxsulam, fenoxaprop-p-ethyl plus ethoxysulfuron and cyhalofop‑butyl plus penoxsulam are widely used in sub-tropical rice ecosystems of Eastern India. The main objective of this study was to know whether application of above listed post emergence herbicides at recommended (n1) and double recommended dose (n2) has any negative impact on arbuscular mycorrhizal fungal (AMF) association in rice plants. Further, the effects of herbicides on soil microbial properties viz. microbial biomass carbon (MBC), fluroscein diacetate (FDA), dehydrogenase (DHA), acid phosphatase (AcP) and alkaline phosphatase (AkP) activities were analyzed using unsupervised and supervised learning methods. Results indicated that among different herbicides evaluated only application of penoxsulam significantly ( p <0.05) reduced the AMF root colonization (58.0%) at recommended dose (n1) compared to only AMF (70.3%) application. Whereas, application of bispyribac sodium (both n1 and n2 dose) enhanced AMF sporulation (1100 spores/100 g) and root colonization (86.68%) compared to other herbicides application. Unsupervised learning approaches through PCA found that application of bispyribac sodium enhanced both above ground plant growth responses and soil microbial properties, but penoxsulam had negative impact. But, the combined application of penoxsulam and cyhalofop‑butyl did not show any negative impact on AMF association in rice plants. This study concluded that selection of right type of post-emergence herbicides are very important to minimize the harmful effect or enhance AMF association in rice plants., Competing Interests: The authors declare that they have no conflict of interest., (© 2021 The Authors. Published by Elsevier B.V.)
- Published
- 2021
- Full Text
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