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Microbial Biomass C,N and P in Disturbed Dry Tropical Forest soils,India

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Pedosphere 2010年第6期20卷 780-788页

作者： j.s.singh D.P.singh A.K.KAsHYAP Department of Environmental science Babasaheb Bhimrao Ambedkar University Department of Botany Banaras Hindu University

Variations in microbial biomass C (MB-C),N (MB-N) and P (MB-P) along a gradient of different dominant vegeta- tion covers (natural forest,mixed deciduous forest,disturbed savanna and grassland ecosystems) in dry tropical soils of Vindhyan Plateau,India were studied from january 2005 to December *** water holding capacity,organic C,total N,total P and soil moisture content were comparatively higher in forest soils than in the savanna and grassland *** different study sites the mean annual MB-C,MB-N and MB-P at 0-15 cm soil depth varied from 312.05 ± 4.22 to 653.40 ± 3.17,32.16 ± 6.25 to 75.66 ± 7.21 and 18.94 ± 2.94 to 30.83 ± 23.08 μg g ?1 dry soil,*** all the investigated sites,the maximum MB-C,MB-N and MB-P occurred during the dry period (summer season) and the minimum in wet period (rainy season).In the present study,soil MB-C,MB-N and MB-P were higher at the forest sites compared to savanna and grassland *** differences in MB-C,MB-N and MB-P were significant (P sites and *** MB-C (P sitively correlated with organic C,while the relationship between soil moisture and MB-C,MB-N and MB-P (P spectively) was *** decreasing order of MB-C,MB-N and MB-P along study ecosystems was natural forest > mixed deciduous forest > savanna > *** results suggested that deforestation and land use practices (conversion of forest into savanna and grassland) caused the alterations in soil properties,which as a consequence,led to reduction in soil nutrients and MB-C,MB-N and MB-P in the soil of disturbed sites (grassland and savanna) compared to undisturbed forest ecosystems.

关键词： deciduous forest grassland savanna soil moisture vegetation

Relative effects of different leaf attributes on sapling growth in tropical dry forest

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journal of Plant Ecology 2014年第6期7卷 544-558页

作者： Ravi K.Chaturvedi A.s.Raghubanshi j.s.singh Institute of Environment and sustainable Development Banaras Hindu UniversityVaranasi 221005India Ecosystems Analysis laboratory Department of BotanyBanaras Hindu UniversityVaranasi 221005India

Aims soil moisture content(sMC)influences establishment,survival and development of plant species and is considered as the most important limiting factor in tropical dry forest(TDF).In this study we attempt to establish the relationship between leaf attributes and of tree saplings in TDF and address the following questions:(i)how are the functional attributes of dominant tree saplings of TDF affected by seasonal changes in sMC at different habitats?,(ii)what is the relationship of functional attributes with each other?,(iii)how are the functional attributes and their plasticity affected by habitat con-ditions?and(iv)can the functional attributes in single or in com-bination predict the growth rate of tree saplings of TDF?The study was conducted on four sites(Hathinala,Gaighat,Harnakachar and Ranitali,listed in order of decreasing sMC)within the tropical dry deciduous forest in northern *** We analysed eight leaf attributes,specific leaf area(sLA);leaf dry matter content(LDMC);leaf nitrogen concentration(leaf N);leaf phosphorus concentration(leaf P);chlorophyll concentration(Chl);mass-based photosynthetic rate(Amass);mass-based stomatal con-ductance(Gsmass);intrinsic water use efficiency(WUEi)and three growth attributes,relative diameter increment(RDI);relative height increment(RHI);relative growth rate(RGR)of the 10 dominant tree saplings(viz.,Acacia catechu,Anogeissus latifolia,Boswellia serrata,Buchanania lanzan,Diospyros melanoxylon,Hardwickia binata,Lagerstroemia parviflora,Lannea coromandelica,shorea robusta and Terminalia tomentosa)of a TDF and observed the effects of site,season and species for a period of 2 *** were selected in gradients of ***-wise multiple regression was performed to predict RDI,RHI and RGR from mean values of sMC and leaf *** Findings All the 11 attributes were interrelated and differed significantly among the 10 *** response varied across sites and *** the sMC g

关键词： tropical dry forest soil moisture content deciduousness tree saplings leaf attributes relative growth rate

Carbon fluxes and species diversity in grazed and fenced typical steppe grassland of Inner Mongolia, China

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journal of Plant Ecology 2019年第1期12卷 10-22页

作者： R.sagar G.Y.Li j.s.singh shiqiang Wan Department of Botany Institute of ScienceBanaras Hindu UniversityVaranasi-221005India International joint Research Laboratory for Global Change Ecology College of Life SciencesHenan UniversityKaifeng 475004China

Aim Grasslands are dominant vegetation of China,support outstanding biodiversity and sequester bulk amount of atmospheric CO_(2).These grasslands are highly degraded and fragmented due to remarkable anthropogenic and grazing *** Government has made great attempt to restore by grazing *** relations of carbon fluxes with species composition and diversity in the communities sensitive to grazing by large herbivores are needed to be analysed under the global climate change *** objective of present study was to comprehend the effects of grazing and fencing on the ecosystem structure and function of the typical steppe *** To meet the objectives,overgrazed and fenced(since year 2001)sys-tems were selected in typical steppe grassland at the Duolun Restoration Ecology Research station,Inner Mogolia,*** each system,three dominant communities with three replicates were *** each replicate community,three 1×1 m plots,were randomly *** plot was divided into four 50×50 cm quadrats.A total of 216,50×50 cm quadrats were *** each quadrat,number of individuals and above-ground herbaceous biomass for each species,soil respiration(sR),ecosystem respira-tion(ER),net(NEE)as well as gross(GEE)ecosystem CO_(2) exchanges were recorded in june *** were well analysed using statistical *** correspondence analysis showed dif-ferential responses of communities to the structure and function of the typical steppe *** Findings Across the communities,fencing reduced the soil tempera-ture by 12%and at the same time increased the soil moisture by 44.30%,thus,increased the species richness by 28%,evenness by 21%,above-ground biomass by 19%and plant carbon by 20%.Interestingly,fencing increased NEE by 128%,GEE by 77%,sR by 65%and ER by 39%.Under fencing,species composition partially governed the CO_(2) exchange *** Fencing reduces soil temperature and thereby improves specie

关键词： canonical correspondence analysis ecosystem carbon uptake grazing species composition species evenness species richness

山地农业生态系统的能量学——喜马拉雅山中部一个实例的研究

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农业系统科学与综合研究 1985年第1期 66-74页

作者： Uma Pandey j.s.singh 牛叔文王留芳印度奈尼塔尔库茂恩大学植物系

本研究分析了山地农业生态系统中作物生产的能量估算,讨论了农业生态系统和自然生态系统的关系。耕地按种植方式划分为(Ⅰ)主种蔬菜的模式,(Ⅱ)主种小麦的模式。输入、输出的能值表明,在所有的种植模式中,小麦一大豆的输入最小,马铃薯-... 详细信息

本研究分析了山地农业生态系统中作物生产的能量估算,讨论了农业生态系统和自然生态系统的关系。耕地按种植方式划分为(Ⅰ)主种蔬菜的模式,(Ⅱ)主种小麦的模式。输入、输出的能值表明,在所有的种植模式中,小麦一大豆的输入最小,马铃薯-白菜-马铃薯的输入最大。主种蔬菜的生态系统比起主种小麦的生态系统来,输入的化肥多24倍,粪肥多150倍,种子多5倍,人力多5倍,而产生能的输出只多0.7倍。山地农业在很大程度上依赖于周围的森林生态系统,也代表着巨大的能量消耗中心。

关键词：小麦蔬菜麦类作物园艺作物土豆茄属马铃薯粪肥主种森林生态系统大豆产投比

A comprehensive investigation on nonlinear vibration and bending characteristics of bio-inspired helicoidal laminated composite structures

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 81-100页

作者： s.sAURABH R.KIRAN D.singh R.VAIsH V.s.CHAUHAN school of Mechanical and Materials Engineering Indian Institute of Technology Mandi

Bio-inspired helicoidal composite laminates, inspired by the intricate helical structures found in nature, present a promising frontier for enhancing the mechanical properties of structural designs. Hence, this study provides a comprehensive investigation into the nonlinear free vibration and nonlinear bending behavior of bio-inspired composite plates. The inverse hyperbolic shear deformation theory(IHsDT) of plates is employed to characterize the displacement field, with the incorporation of Green-Lagrange nonlinearity. The problem is modeled using the C0finite element method(FEM), and an in-house code is developed in the MATLAB environment to solve it numerically. Various helicoidal layup configurations including helicoidal recursive(HR), helicoidal exponential(HE), helicoidal semi-circular(Hs), linear helicoidal(LH), and Fibonacci helicoidal(FH)with different layup sequences and quasi-isotropic configurations are studied. The model is validated, and parametric studies are conducted. These studies investigate the effects of layup configurations, side-to-thickness ratio, modulus ratios, boundary conditions, and loading conditions at different load amplitudes on the nonlinear vibration and nonlinear bending behaviors of bio-inspired composite plates. The results show that the laminate sequence exerts a substantial impact on both nonlinear natural frequencies and nonlinear bending behaviors. Moreover, this influence varies across different side-to-thickness ratios and boundary conditions of the bio-inspired composite plate.

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Three-stage Transfer Learning with AlexNet50 for MRI Image Multi-Class Classification with Optimal Learning Rate

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Computer Modeling in Engineering & sciences 2025年第1期142卷 155-183页

作者： suganya Athisayamani A.Robert singh Gyanendra Prasad joshi Woong Cho school of Computing Sastra Deemed to be UniversityThanjavur613401India Department of Computational Intelligence SRM Institute of Science and TechnologyKattankulathur603203India Department of AI and software Engineering Kangwon National UniversitySamcheok25913Republic of Korea Department of Electronics Information and Communication EngineeringKangwon National UniversitySamcheok25913Republic of Korea

In radiology,magnetic resonance imaging(MRI)is an essential diagnostic tool that provides detailed images of a patient’s anatomical and physiological *** is particularly effective for detecting soft tissue ***,radiologists manually interpret these images,which can be labor-intensive and time-consuming due to the vast amount of *** address this challenge,machine learning,and deep learning approaches can be utilized to improve the accuracy and efficiency of anomaly detection in MRI *** manuscript presents the use of the Deep AlexNet50 model for MRI classification with discriminative learning *** are three stages for learning;in the first stage,the whole dataset is used to learn the *** the second stage,some layers of AlexNet50 are frozen with an augmented dataset,and in the third stage,AlexNet50 with an augmented dataset with the augmented *** method used three publicly available MRI classification datasets:Harvard whole brain atlas(HWBA-dataset),the school of Biomedical Engineering of southern Medical University(sMU-dataset),and The National Institute of Neuroscience and Hospitals brain MRI dataset(NINs-dataset)for *** hyperparameter optimizers like Adam,stochastic gradient descent(sGD),Root mean square propagation(RMs prop),Adamax,and AdamW have been used to compare the performance of the learning ***-dataset registers maximum classification *** evaluated the performance of the proposed classification model using several quantitative metrics,achieving an average accuracy of 98%.

关键词： MRI tumors classification AlexNet50 transfer learning hyperparameter tuning optimizer

Exploring the role of N-acetyltransferases in diseases:a focus on N-acetyltransferase 9 in neurodegeneration

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Neural Regeneration Research 2025年第10期20卷 2862-2871页

作者： Prajakta Deshpande Anuradha Venkatakrishnan Chimata Amit singh Department of Biology University of DaytonDaytonOHUSA Premedical Program University of DaytonDaytonOHUSA Center for Tissue Regeneration and Engineering at Dayton(TREND) University of DaytonDaytonOHUSA Integrative science and Engineering Center University of DaytonDaytonOHUSA Center for Genomic Advocacy(TCGA) Indiana State UniversityTerre HauteINUSA

Acetyltransferases,required to transfer an acetyl group on protein are highly conserved proteins that play a crucial role in development and *** acetylation is a common post-translational modification pivotal to basic cellular *** to 80%-90%of proteins are acetylated during translation,which is an irreversible process that affects protein structure,function,life,and *** this review,we have discussed the various N-acetyltransferases present in humans,their function,and how they might play a role in ***,we have focused on N-acetyltransferase 9 and its role in microtubule *** have shed light on how N-acetyltransferase 9 and acetylation of proteins can potentially play a role in neurodegenerative *** have specifically discussed the N-acetyltransferase 9-acetylation independent function and regulation of c-jun N-terminal kinase signaling and microtubule stability during development and neurodegeneration.

关键词： acetyl-coenzyme A Alzheimer’s disease animal models cell death drosophila eye human disease c-jun N-terminal kinase signaling N-Acetyltransferases N-acetyltransferase 9 neurodegeneration

Fibrinogen’s potential role in connecting cerebrovascular abnormalities with glymphatic dysfunction in Alzheimer’s disease

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Neural Regeneration Research 2025年第1期20卷 203-204页

作者： Vishal singh Arnab Choudhury Hyung jin Ahn Department of Pharmacology Physiology and NeurosciencesRutgers-New Jersey Medical SchoolNewarkNJUSA Brain Health Institute Rutgers UniversityPiscatawayNJUSA

Alzheimer’s disease(AD)stands out as the primary manifestation of age-related dementia,portraying a chronic neurodegenerative disorder distinguished by the accumulation of fibrillar amyloid-β(Aβ)plaques and neurofibrillary tangles of hyperphosphorylated ***,from a clinical standpoint,AD presents itself as a complex condition with a spectrum of dysfunctions rather than a singular pathological *** often-overlooked aspect of the disease is the presence of extensive cerebrovascular abnormalities,given that the majority of AD patients experience altered cerebral blood flow,damaged vasculature,increased microinfarcts and *** models of AD further support this observation,showing cerebrovascular dysfunction such as impaired cerebral blood flow and altered cerebrovascular reactivity(Tataryn et al.,2021;Gareau et al.,2023).

关键词： cerebrovascular dysfunction Alzheimer

Women in visual neural regeneration research

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Neural Regeneration Research 2025年第2期20卷 489-490页

作者： Tonia s.Rex David j.Calkins Vanderbilt Eye Institute Vanderbilt University Medical CenterNashvilleTNUSA

The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of *** take an opportunity here to examine the state of gender bias in a relatively new yet already prominent field,neural regeneration in the visual system,for which there is a well-defined context useful for this *** National Eye Institute(NEI)provided the first round of research funding for its Audacious Goals Initiative(AGI)on visual neural regeneration in 2013 and the last round in ***,we focus on this *** sources included PubMed,the National science Foundation(NsF),the NEI,the Blue Ridge Institute for Medical Research and data from the major professional organization for eye and vision research,the Association for Research in Vision and Ophthalmology(ARVO).

关键词： neural visual Times