检索结果-南通市图书馆

Suspended sediment dynamics in the meltwater of Chhota Shigri glacier, Chandra basin, Lahaul-Spiti valley, India

Journal of Mountain Science 2018年第1期15卷 68-81页

作者： Virendra Bahadur SINGH al.ramanathan School of Environmental Sciences Jawaharlal Nehru University

Present study shows suspended sediment dynamics in the meltwater of Chhota Shigri glacier,Himachal Pradesh,India for different melt seasons during the period *** suspended sediment concentration in the meltwater was found during the month of July 2011,2012 and 2014 constituting to 55.2%,48.3% and 46.9%,*** in 2013,maximum suspended sediment concentration was observed in August accounting for46.1% of the *** the other hand,maximum suspended sediment load was monitored in the month of July 2011,2012 and 2014 constituting 59.5%,63% and 55.7% of the total,*** in2013,maximum suspended sediment load was observed in the month of August accounting for 49.8% of the total suspended sediment *** distribution of suspended sediment concentration(SSC)and suspended sediment load(SSL)in the Chhota Shigri glacier shows higher value of SSC and SSL during the study period 2012 and 2013,which may be due to the presence of high glacial runoff and negative mass balance of the studied area during these time *** diurnal variation has been observed in the SSC of *** correlation was observed between SSC and SSL with *** the other hand,SSC and SSL also showed strong exponential correlation with air temperature of the studied *** yield from the catchment of Chhota Shigri glacier is high during the peak melt season(July and August)and low during the late melt season(September and October).The average value of erosion rate for Chhota Shigri glacier basin during the study period 2011-2014 was calculated to be 1.1mm/yr,which is lower than the average erosion rate of other Himalayan glaciers such as Rakiot,Chorabari and Gangotri glaciers,which may be caused by its geological setting containing high erosion resistant rocks such as granite,granite gneiss and porphyritic granite.

关键词： Suspended sediment concentration Hysteresis Sediment yield Erosion rate Western Himalaya Chhota Shigri glacier

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Understanding arsenic behavior in alluvial aquifers:Evidence from sediment geochemistry,solute chemistry and environmental isotopes

引用

Geoscience Frontiers 2024年第5期15卷 222-238页

作者： Shailesh Kumar Yadav al.ramanathan Chidambaram Sabarathinam alok Kumar Manoj Kumar Anshula Dhiman School of Environmental Sciences Jawaharlal Nehru UniversityNew Delhi 110067India Water Research Center Kuwait Institute for Scientific ResearchKuwait Department of Environmental Studies University of Delhi110007India Department of Earth and Environmental Sciences Indian Institute of Science Education and Research MohaliSector 81140306India

The hydro-geochemistry and isotopic variations in groundwater,coupled with sediment geochemistry,were investigated in the Middle Gangetic Plain,India,to better understand the aquifer dynamics that influence the arsenic(As)evolution and ***-four groundwater samples,thirteen River water samples,and two sediment cores(33 mbgl)were *** samples were analyzed for major ions and trace metals,including As and stable isotopic variability(δ^(2)H,δ^(18)O,andδ^(13)C).The study area was categorized into older and younger alluvium based on existing geomorphological *** alluvium exhibits higher As enrichment in sediment and groundwater,ranging of 2.59–31.52 mg/kg and bdl to 0.62 mg/*** samples were thermodynamically more stable with As(OH)_(3)species ranging from 88.5%to 91.4%and FeOOH from 69%to 81%,*** and mineralogical analysis suggested goethite and siderite act as a source and sink for ***,statistical analysis suggested reductive dissolution as the primary mechanism for As mobilization in the study ***-temporal analysis revealed elevated concentrations of As in the central and northeastern regions of the study *** isotope(δ^(2)H andδ^(18)O)analysis inferred active recharge conditions primarily driven by *** depleted d-excess value and enrichedδ^(18)O in the groundwater of younger alluvium indicate the effect of groundwater recharge with significant evaporation *** recharge potentially decreased the quantity of arsenic in groundwater,whereas evaporation enrichment increased *** infiltration during recharge introduces oxygenated water into the aquifer,leading to changes in the redox conditions and facilitating biogeochemical *** carbon isotope(δ^(13)C)results suggest that high microbial activity in younger alluvium promotes As leaching from sediment into the groundwater.

关键词： Groundwater recharge Reductive dissolution Older alluvium Younger alluvium Ghazipur Stable isotope

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regional representation of glaciers in Chandra Basin region,western Himalaya,India

引用

Geoscience Frontiers 2017年第4期8卷 841-850页

作者： Pratima Pandey S.Nawaz ali al.ramanathan P.K.Champati ray G.Venkataraman Geosciences and Geohazards Department Indian Institute of Remote Sensing Birbal Sahni Institute of Paleosciences School of Environmental Science Jawaharlal Nehru University Centre of Studies in Resource Engineering Indian Institute of Technology

Hamtah and Chhota Shigri are two nearby,well monitored glaciers of western Himalaya,lying in the same climatic zone and driven by the same climatic *** this study,topographical characteristics of both the glacier have been explored to understand the role of topography in controlling the glacier ***,their topographical characteristics and possible response towards climatic variations have been compared with each other and also with that of the other glaciers in the basin to find out the suitability of these two glaciers to be considered as representative of the *** sensor and multi temporal remote sensing data have been used to carry out to fulfill the *** is found that being in the same climatic zone,the mean accumulation area ratio of Chhota Shigri is 54%and Hamtah is 11%between 1980 and *** comparison to Hamtah,Chhota Shigri glacier has a small upslope area,low compactness ratio indicating the ability of the glacier to receive direct precipitation and solar *** analysis revealed that the Chhota Shigri glacier has a closer resemblance with the other glaciers in the region than Hamtah ***,the topographical settings of Chhota Shigri glacier are suitable for recording and reflecting year-to-year climatic variations.

关键词： Himalaya Glacier Regional representation Topography Remote sensing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of P301L-TAU on post-translational modifications of microtubules in human iPSC-derived cortical neurons and TAU transgenic mice

引用

Neural Regeneration Research 2025年第8期20卷 2348-2360页

作者： Mohamed Aghyad al Kabbani Christoph Köhler Hans Zempel Institute of Human Genetics Faculty of Medicine and University Hospital CologneUniversity of CologneCologneGermany Center for Molecular Medicine Cologne(CMMC) University of CologneCologneGermany Center Anatomy Department ⅡMedical FacultyUniversity of CologneCologneGermany

TAU is a microtubule-associated protein that promotes microtubule assembly and stability in the *** is missorted and aggregated in an array of diseases known as *** are essential for neuronal function and regulated via a complex set of post-translational modifications,changes of which affect microtubule stability and dynamics,microtubule interaction with other proteins and cellular structures,and mediate recruitment of microtubule-severing *** impairment of microtubule dynamics causes neuronal dysfunction,we hypothesize cognitive impairment in human disease to be impacted by impairment of microtubule *** therefore aimed to study the effects of a disease-causing mutation of TAU(P301L)on the levels and localization of microtubule post-translational modifications indicative of microtubule stability and dynamics,to assess whether P301L-TAU causes stability-changing modifications to *** investigate TAU localization,phosphorylation,and effects on tubulin post-translational modifications,we expressed wild-type or P301L-TAU in human MAPT-KO induced pluripotent stem cell-derived neurons(i Neurons)and studied TAU in neurons in the hippocampus of mice transgenic for human P301L-TAU(p R5 mice).Human neurons expressing the longest TAU isoform(2N4R)with the P301L mutation showed increased TAU phosphorylation at the AT8,but not the p-Ser-262 epitope,and increased polyglutamylation and acetylation of microtubules compared with endogenous TAU-expressing neurons.P301L-TAU showed pronounced somatodendritic presence,but also successful axonal enrichment and a similar axodendritic distribution comparable to exogenously expressed 2N4R-wildtype-TAU.P301L-TAU-expressing hippocampal neurons in transgenic mice showed prominent missorting and tauopathy-typical AT8-phosphorylation of TAU and increased polyglutamylation,but reduced acetylation,of microtubules compared with non-transgenic *** sum,P301L-TAU results in changes in micr

关键词： human induced pluripotent stem cell microtubules P301L pR5 mice TAU tauopathy tubulin code

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

DIAGNOSIS OF WAVE ACTIVITY OVER RAINBAND OF LANDFalL TYPHOON

引用

Journal of Tropical Meteorology 2009年第2期15卷 121-129页

作者：冉令坤 Abdul REHIM al.ramanathan Institute of Atmospheric Physics Chinese Academy of Sciences Bangladesh Meteorological Department School of Environmental Science Jawaharlal Nehru University

A generalized wave-activity density, which is defined as an absolute value of production of three-dimensional vorticity vector perturbation and gradient of general potential temperature perturbation, is introduced and its wave-activity law is derived in Cartesian coordinates. Constructed in an agoestrophic and nonhydrostatie dynamical framework, the generalized wave-activity law may be applicable to diagnose mesoscale weather systems leading to heavy rainfall. The generalized wave-activity density and wave-activity flux divergence were calculated with the objective analysis data to investigate the character of wave activity over heavy-rainfall regions. The primary dynamical processes responsible for disturbance associated with heavy rainfall were also analyzed. It was shown that the generalized wave-activity density was closely correlated to the observed 6-h accumulative rainfall. This indicated that the wave activity or disturbance was evident over the frontal and landfall-typhoon heavy-rainfall regions in middle and lower troposphere. For the landfall-typhoon rainband, the portion of generalized wave-activity flux divergence, denoting the interaction between the basic-state cyclonic circulation of landfall typhoon and mesoscale waves, was the primary dynamic process responsible for the evolution of generalized wave-activity density.

关键词： dynamic meteorology wave-activity density wave-activity flux divergence landfall typhoon, heavy-rainfall event

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Humic substances:Structure,function and benefits for agroecosystems—a review

引用

Pedosphere 2023年第2期33卷 237-249页

作者： Jaya TIWARI al.ramanathan Kuldeep BAUDDH John KORSTAD Department of Community Medicine and School of Public Health Postgraduate Institute of Medical Education and ResearchChandigarh 160012(India) Skill faculty of Applied Sciences and Humanities Shri Vishwakarma Skill UniversityPalwal Haryana 121102(India) School of Environmental Sciences Jawaharlal Nehru UniversityNew Delhi 110067(India) Department of Environmental Sciences Central University of JharkhandRanchi 835205(India) Department of Biology and Global Environmental Sustainability Oral Roberts UniversityTulsa OK 74171(USA)

The increasing global demand for food production,often causing excessive use of chemical fertilizers,has led to the deterioration of soil *** action is required to restore soil health in a sustainable *** review advocates switching to use of organic matter(manure and compost)that contains vital nutrients for plant growth and helps restore soil *** substances(HSs),derived from degraded plant remains and found ubiquitously in nature,are an important source of organic *** application of HSs to soil enhances essential nutrient supply and assimilation of atmospheric CO_(2)due to increasing biomass *** HS application globally can help lower atmospheric CO_(2)concentrations and create a sustainable agricultural ***,the process of humification and the molecular structure of HSs remain poorly understood subjects in soil ***,it is imperative to understand the mechanisms underlying various roles of HSs in *** review offers an insight into the various structural and functional aspects of HSs,particularly fulvic acid and humic *** dynamic and interactive nature of HSs creates a framework for sustainable agriculture.

关键词： fulvic acid humic acid humin humus nutrient supply soil health sustainable agriculture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Diet fortification for mild and moderate picky eating in typically developed children:Opinion review of Middle East consensus

引用

World Journal of Clinical Pediatrics 2025年第1期14卷 139-148页

作者： Mohammed al-Beltagi Elie Choueiry Najat alahmadi Zeinab Demerdash Wafaa Helmi Ayesh Khoula al-Said Fatima al-Haddad Sanaa Y Shaaban Eslam Tawfik Department of Pediatric Faculty of MedicineTanta UniversityTanta 31511Egypt Department of Pediatric University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671ManamaBahrain Paediatric Intensive and Critical Care Unit Hospital Hôtel Dieu de FranceBeirut 166830BeyrouthLebanon Department of Pediatric Gastroenterology Hepatology and NutritionMadina Maternity and Children HospitalKing Salman Medical CityAlmadina Almonawarh 41412Almadina AlmonawarhSaudi Arabia Department of Gastroenterology Hepatology and NutritionAl Amiri HospitalKuwait City 999044Kuwait Department of Nutrition Altadawi Speciality HospitalDubai 1853DubayyUnited Arab Emirates Department of Paediatric Gastroenterology Royal HospitalMuscat 1331MuscatOman Department of Dietetic Salmaniya Medical ComplexGovernment HospitalsAl Salmaniya 12ManamaBahrain Department of Pediatrics Faculty of MedicineAin Shams UniversityCairo 11591Egypt Department of Paediatric Faculty of MedicineSuez UniversitySuez 41522Egypt Department of Paediatric Sheikh Khalifa Medical CityAbu Dhabi 00000Abu DhabiUnited Arab Emirates

BACKGROUND Picky eating is a commonly observed behavior among children globally,negatively impacting their physical and mental *** common characteristics distinguish peaky eaters,including food selectivity,food neophobia,and food avoidance,there is no clear definition to assess this *** to the unavailability of data regarding picky eating,it wasn’t easy to estimate its *** To develop a regional protocol to help healthcare professionals identify and manage mild and moderate picky eating *** A virtual roundtable discussion was held in April 2021 to gather the opinions of seven pediatricians and two pediatric dietitians from eight Middle Eastern countries who had great experience in the management of picky *** discussion covered different topics,including clearly defining mild and moderate picky eating,identifying the role of diet fortification in these cases,and the possibility of developing a systematic approach to diet *** The panel identified picky eating as consuming an inadequate amount and variety of foods by rejecting familiar and unfamiliar *** of the time,moderate picky eating cases had micronutrient deficiencies with over-or undernutrition;the mild cases only showed inadequate food consumption and/or poor diet *** attention to the organic red flags like growth faltering and development delay and behavioral red flags,including food fixation and anticipatory gagging,will help healthcare professionals evaluate the picky eaters and the caregivers to care for their *** dietary supplementation and commercial food fortification play an important role in picky eating,they were no benefit in the Middle *** The panel agreed that food fortification through a food-first approach and oral nutritional supplements would be the best for Middle Eastern *** recommendations would facilitate identifying and managing picky-eating children in the Middle East.

关键词： Picky eating Diet fortification Children Protocol Roundtable discussion Middle East

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrochemical capacitance of nanostructured ruthenium- doped tin oxide Sn1-xRuxO2 by the microemulsion method

引用

Frontiers of Materials Science 2017年第4期11卷 385-394页

作者： ramanathan SARASWATHY Department of Physics Velammal Institute of Technology Panchetti Thiruvallur-601204 India

Synthesis of nanostructured Ru-doped SnO2 was successfully carried out using the reverse microemulsion method. The phase purity and the crystallite size were analyzed by XRD. The surface morphology and the microstructure of synthesized nanoparticles were analyzed by SEM and TEM. The vibration mode of nanoparticles was investigated using FTIR and Raman studies. The electrochemical behavior of the Ru- doped SnO2 electrode was evaluated in a 0.1 mol/L Na2SO4 solution using cyclic voltammetry. The 5% Ru-doped SnO2 electrode exhibited a high specific capacitance of 535.6 Fig at a scan rate 20 mV/s, possessing good conductivity as well as the electro- cycling stability. The Ru-doped SnO2 composite shows excellent electrochemical properties, suggesting that this composite is a promising material for supercapacitors.

关键词： reverse microemulsion tin oxide nanomaterials supercapacitor electrochemical property

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Unveiling the impact:COVID-19's influence on bacterial resistance in the Kingdom of Bahrain

引用

World Journal of Virology 2025年第1期14卷 83-98页

作者： Nermin K Saeed Safiya K almusawi Noor A albalooshi Mohammed al-Beltagi Medical Microbiology Section Department of PathologySalmaniya Medical ComplexGovernmental HospitalsManama 12Bahrain Medical Microbiology Section Department of PathologyRoyal College of Surgeons in Ireland-Medical University of BahrainBusaiteen 15503MuharraqBahrain Department of Paediatrics Faculty of MedicineTanta UniversityTanta 31511AlghrabiaEgypt Department of Pediatric University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671AlgharbiaBahrain

BACKGROUND Antibiotic resistance is a growing global health threat,and understanding local trends in bacterial isolates and their susceptibility patterns is crucial for effective infection control and antimicrobial *** coronavirus disease 2019(COVID-19)pandemic has introduced additional complexities,potentially influencing these *** To analyze trends in bacterial isolates and their antibiotic susceptibility patterns at Salmaniya Medical Complex from 2018 to 2023,with a specific focus on the impact of the COVID-19 pandemic on these *** A retrospective analysis of microbiological data was conducted,covering the period from 2018 to *** study included key bacterial pathogens such as Escherichia coli(***),Klebsiella pneumoniae,Acinetobacter baumannii,Pseudomonas aeruginosa,and Staphylococcus aureus,among *** antibiotic susceptibility profiles of these isolates were assessed using standard laboratory *** contextualize the findings,the findings were compared with similar studies from other regions,including China,India,Romania,Saudi Arabia,the United Arab Emirates,Malaysia,and United *** The study revealed fluctuating trends in the prevalence of bacterial isolates,with notable changes during the COVID-19 *** example,a significant increase in the prevalence of Staphylococcus aureus was observed during the pandemic years,while the prevalence of *** showed a more variable *** resistance rates varied among the different pathogens,with a concerning rise in resistance to commonly used antibiotics,particularly among Klebsiella pneumoniae and ***,the study identified an alarming increase in the prevalence of multidrug-resistant(MDR)strains,especially within Klebsiella pneumoniae and *** *** impact of the COVID-19 pandemic on these trends was evident,with shifts in the frequency,resistance patterns,and the emergence of MDR bacteria among several key ***

关键词： Multidrug-resistant organisms Antibiotic susceptibility COVID-19 pandemic Antimicrobial stewardship Bacterial isolates Salmaniya Medical Complex Bahrain

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diabetes-inducing effects of bronchial asthma

引用

World Journal of Diabetes 2025年第1期16卷 121-139页

作者： Mohammed al-Beltagi Adel Salah Bediwy Nermin Kamal Saeed Hosameldin A Bediwy Reem Elbeltagi Department of Pediatric Faculty of MedicineTanta UniversityTanta 31511AlghrabiaEgypt Department of Pediatric University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671ManamaBahrain Department of Pulmonology Faculty of MedicineTanta UniversityTanta 31527AlghrabiaEgypt Department of Pulmonology University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671ManamaBahrain Medical Microbiology Section Department of PathologySalmaniya Medical ComplexMinistry of HealthKingdom of BahrainManama 26671ManamaBahrain Medical Microbiology Section Department of PathologyIrish Royal College of SurgeonBusaiteen 15503MuharraqBahrain Faculty of Medicine Tanta UniversityTanta 31527AlgharbiaEgypt Department of Medicine The Royal College of Surgeons in Ireland-BahrainBusiateen 15503MuharraqBahrain

BACKGROUND The relationship between diabetes mellitus(DM)and asthma is complex and can impact disease *** To explore the bidirectional influences between the two conditions on clinical outcomes and disease *** We systematically reviewed the literature on the relationship between DM and asthma,focusing on their impacts,mechanisms,and therapeutic *** studies were assessed,which investigated the effect of glycemic control on asthma outcomes,lung function,and *** study highlighted the role of specific diabetes medications in managing *** The results showed that poor glycemic control in diabetes can exacerbate asthma,increase hospitalizations,and reduce lung ***,severe asthma,especially in obese individuals,can complicate diabetes management and make glycemic control more *** diabetes-associated mechanisms,such as inflammation,microangiopathy,and oxidative stress,can exacerbate asthma and decrease lung *** diabetes medications exhibit anti-inflammatory effects that show promise in mitigating asthma *** The complex interrelationship between diabetes and asthma suggests bidirectional influences that affect disease course and *** and microvascular complications associated with diabetes may worsen asthma outcomes,while asthma severity,especially in obese individuals,complicates diabetes ***,the current research has limitations,and more diverse longitudinal studies are required to establish causal relationships and identify effective treatment strategies for individuals with both conditions.

关键词： Diabetes mellitus Bronchial asthma Glycemic control Lung function Asthma exacerbation Disease interaction Microangiopathy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：