检索结果-南通市图书馆

Absolute copy number differences of Y chromosomal genes between crossbred (Bos taurus×Bos indicus) and Indicine bulls

引用

Journal of Animal Science and Biotechnology 2013年第4期4卷 257-263页

作者： ayan mukherjee Gulshan Dass Jagan Mohanarao G Moloya Gohain Biswajit Brahma Tirtha Kumar Datta Sachinandan De Animal Genomics Lab Animal Biotechnology Centre National Dairy Research Institute Department of Veterinary Biochemistry College of Veterinary Sciences & Animal Husbandry Central Agricultural University

Background： The Y chromosome in mammal is paternally inherited and harbors genes related to male fertility and spermatogenesis. The unique intra-chromosomal recombination pattern of Y chromosome and morphological difference of this chromosome between Bos taurus and Bos indicus make it an ideal model for studying structural variation, especially in crossbred （Bos taurus x Bos indicus） bulls. Copy Number Variation （CNV） is a type of genomic structural variation that gives information complementary to SNP data. The purpose of this study was to find out copy number differences of four Y chromosomal spermatogenesis-related candidate genes in genomic DNA of crossbred and purebred Indicine bulls. Result： Four Y chromosomal candidate genes of spermatogenesis namely, sex determining gene on Ychromosome （SRY）, DEAD box po/ypeptide 3-Y chromosome （DDX3 Y）, Ubiquidn specific peptidase 9, Y-linked （ usPgY）, testis-specific protein on Y chromosome （TSPY） were evaluated. Absolute copy numbers of Y chromosomal genes were determined by standard curve-based quantitative real time PCR. Copy numbers of SRYand TSPYgenes per unit amount of genomic DNA are higher in crossbred than Indicine bulls. However, no difference was observed in DDX3Yand usPgYgene copy numbers between two groups. Conclusion： The present study demonstrates that the structural organization of Y chromosomes differs between crossbred and Indicine bulls which are reproductively healthy as observed from analysis of semen attributes. The absolute copy numbers of SRY and TSPY genes in unit mass of genomic DNA of crossbred bulls are significantly higher than Indicine bulls. No alteration in absolute copies ofDDX3Yand usPgYgene was found between the genome of crossbred and Indicine bulls. This study suggests that the DDX3Yand USPgYare likely to be single copy genes in the genome of crossbred and Indicine bulls and variation in Y chromosome length between crossbred and Indicine bulls may be due to the copy number variation of

关键词： Absolute copy SRY DDX3Y usPgY TSPY Crossbred

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

Six Newly Discovered Eclipsing Binary Systems in the TESS field

引用

Research in Astronomy and Astrophysics 2023年第3期23卷 143-154页

作者： Burak Ulas Vildan ayan Department of Space Sciences and Technologies Faculty of Sciences?anakkale Onsekiz Mart UniversityTerzioglu CampusTR 17100CanakkaleTurkey

We present the first detailed investigation of six eclipsing binary systems in the TESS *** TESS light curves of the targets are analyzed by determining the initial effective temperatures via SED *** absolute parameters are derived and the systems are compared to well-known binaries of the same *** show that CD-58791,CD-621257 and TYC 9356-355-1 are detached binary ***-54942 and UCAC4136-007295 are contact binaries while TYC 8508-1413-1 is a semidetached system.

关键词： TESS absolute field

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

Hydrogeochemical characteristics and its role in controlling arsenic mobilization in a shallow aquifer

引用

Acta Geochimica 2021年第6期40卷 912-925页

作者： ayan Das Abhijit Mandal Department of Chemistry University of KalyaniKalyaniWest BengalIndia Department of General Science and Humanities GKCIETMaldaWest BengalIndia

The relevance of groundwater hydrogeochemistry to explain the occurrence and distribution of arsenic in groundwater is of great *** insightful discussions on the control of shallow groundwater(<50 m)hydrogeochemistry in arsenic mobilization are known to be a viable tool to explain the arsenic menace in shallow *** present investigation emphasizes the hydrogeochemical driver and/or control over the reductive dissolution of Fe-bearing host minerals and thereby releasing arsenic into the shallow groundwater of the study *** study suggests that hydrogeochemical evolution is mainly governed by carbonate minerals dissolution,silicate weathering,and competitive ion-exchange processes in the shallow aquifers(<50 m).The present study also indicates the prevalence of carbonate minerals dissolution over silicate *** emergence of Cl^(-)concentration in the shallow groundwater founds the possibilities of anthropogenic inputs into the shallow aquifers(<50 m).The reducing environment in shallow aquifers(<50 m)of the study area is evident in the reductive dissolution of Febearing shallow aquifer minerals which absorb arsenic in the solid phase and mobilize arsenic onto shallow *** study opted for many statistical approaches to delineate the correlation among major and minor ionic constituents of the groundwater which are very helpful to understand the comprehensive mechanism of arsenic mobilization into shallow groundwater.

关键词： Arsenic mobilization Groundwater hydrogeochemistry Aquifer sediments Shallow aquifers Redox environment

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

Long-term effects of metformin use in gestational diabetes mellitus on offspring health

引用

World Journal of Diabetes 2021年第11期12卷 1812-1817页

作者： ayan Roy Jayaprakash Sahoo Department of Endocrinology and Metabolism All India Institute of Medical SciencesJodhpur 342005RajasthanIndia Department of Endocrinology Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherry 605006India

Metformin is the first-line drug for the treatment of type 2 diabetes mellitus,but its role in gestational diabetes mellitus(GDM)management is not *** evidence suggests a certain beneficial effect of metformin in the treatment of GDM,but a high treatment failure rate leads to the initiation of additional medications,such as ***,since metformin crosses the placental barrier and reaches a significant level in the fetus,it is likely to influence the fetal metabolic *** evidence indicates the long-term safety in children exposed to metformin in utero except for mild adverse anthropometric *** follow-up of metformin-exposed offspring is warranted from the clinician’s point of view.

关键词： Anthropometry Fetal Gestational diabetes mellitus Long-term Metformin Offspring

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

Relativistic compact stars with charged anisotropic matter

引用

Chinese Physics C 2018年第5期42卷 104-116页

作者： S.K.Maurya ayan Banerjee Phongpichit Channuie Department of Mathematical & Physical Sciences College of Arts & Science University of Nizwa Department of Mathematics Faculty of Applied Sciences Durban University of Technology School of Science Walailak University

In this article, we perform a detailed theoretical analysis of new exact solutions with anisotropic fluid distribution of matter for compact objects subject to hydrostatic equilibrium. We present a family solution to the Einstein-Maxwell equations describing a spherically symmetric, static distribution of a fluid with pressure *** implement an embedding class one condition to obtain a relation between the metric functions. We generalize the properties of a spherical star with hydrostatic equilibrium using the generalised Tolman-Oppenheimer-Volkoff(TOV)equation. We match the interior solution to an exterior Reissner-Nordstr?m one, and study the energy conditions,speed of sound, and mass-radius relation of the star. We also show that the obtained solutions are compatible with observational data for the compact object Her X-1. Regarding our results, the physical behaviour of the present model may serve for the modeling of ultra compact objects.

关键词： Class I spacetime exact solutions compact objects electromagnetic mass models

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

Stable gravastars： Guilfoyle＇s electrically charged solutions

引用

Chinese Physics C 2018年第11期42卷 120-130页

作者： ayan Banerjee J.R. Villanueva Phongpichit Channuie Kimet Jusufi Department of Mathematics Jadavpur University Kolkata-700032 India Instituto de Fisica y Astronomia Facultad de Ciencias Universidad de Valparaiso Gran Bretana 1111 Valparaiso Chile School of Science Walailak University Nakhon Si Thammarat 80160 Thailand Physics Department State University of Tetovo Ilinden Street nn 1200 Macedonia

Compelling alternatives to black holes, namely, gravitational vacuum stars （gravastars）, which are multilayered compact objects, have been proposed to avoid a number of theoretical problems associated with event horizons and singularities. In this work, we construct a spherically symmetric thin-shell charged gravastar model where the vacuum phase transition between the de Sitter interior and the external Reissner-Nordstrom spacetime （RN） are matched at a junction surface, by using the cut-and-paste procedure. Gravastar solutions are found among the Guilfoyle exact solutions where the gravitational potential We and the electric potential field Ф obey a particular relation in a simple form a（b-εФ）^2＋b1, where a, b and bl are arbitrary constants. The simplest ansatz of Guilfoyle＇s solution is implemented by the following assumption： that the total energy density 8πρm＋Q^2/r^4 is constant, where Q（r） is the electric charge up to a certain radius r. We show that, for certain ranges of the parameters, we can avoid the horizon formation, which allows us to study the linearized spherically symmetric radial perturbations around static equilibrium solutions. To lend our solution theoretical support, we also analyze the physical and geometrical properties of gravastar configurations.

关键词： gravastar Guilfoyle exact solutions stability analysis

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

Spectral analysis of χ class data of GRS 1915+105 using TCAF solution

引用

Research in Astronomy and Astrophysics 2020年第12期20卷 347-356页

作者： Anuvab Banerjee ayan Bhattacharjee Dipak Debnath Sandip K.Chakrabarti S.N.Bose National Centre for Basic Sciences Block-JDSector-3Salt LakeKolkata700106India Indian Centre for Space Physics 43 ChalantikaGaria St.Rd.Kolkata700084India

The class variable source GRS 1915+105 exhibits a wide range of time variabilities on timescales of a few seconds to a few days. Depending on the count rates in different energy bands and the nature of the conventional color-color diagram, the variabilities were classified into sixteen classes that were later sequenced in ascending order of Comptonization Efficiency(CE), which is the ratio of power-law and blackbody photons. However, CE estimation is based on an empirical model which does not provide us with a comprehensive picture regarding accretion flow dynamics around the central source. In reality, the accretion flow is comprised of two components: the high angular momentum Keplerian flow in the form of a radiatively efficient disk and a low angular momentum radiatively inefficient sub-Keplerian halo enveloping the disk. These two components contribute differently to the overall flux due to the differences in their radiative efficiencies. Therefore, it is necessary to analyze the spectral behaviors and time variabilities in terms of accretion rates. In χ class, X-ray flux is steady with no significant variation, however various χsubclasses are observed at different X-ray fluxes and variations of count rates across different χ subclasses must be linked to the variation of flow parameters such as the accretion rates, be it the Keplerian disk rate and/or the low angular momentum halo rate. This motivated us to analyze the spectra of the χ class data implementing the physical Two Component Advective Flow(TCAF) solution which directly extracts these two rates from spectral fits. We find that in the χ2,4 classes, which are reportedly devoid of significant outflows, the spectra could be fitted well applying the TCAF solution alone. In the χ1,3 classes, which are always linked with outflows, a cutoff power-law model is needed in addition to the TCAF *** the same time, the normalization required by this model along with the variation of photon index and exponent

关键词： X-Rays:binaries stars:individual(GRS 1915+105) stars:black holes accretion,accretion disks ISM:jets and outflows radiation:dynamics

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

Cardiac drug therapy--considerations in the elderly

引用

Journal of Geriatric Cardiology 2016年第12期13卷 992-997页

作者： Mohamed ayan Naga Venkata Pothineni Aisha Siraj Jawahar L Mehta Division of Cardiovascular Medicine University of Arkansas for Medical Sciences Little Rock AR USA

Elderly individuals constitute a majority of patients encountered in current cardiovascular clinical practice. Management of these patients is a clinical challenge owing to a multitude of factors. Although medications such as statins have been shown to reduce cardiovascular mortality in the general population, evidence supporting the use of these drugs in patients greater than 75 years of age is sparse. Furthermore, aging associated changes in organ function and associated comorbidities influence the pharmacokinetics of multiple medications and can potentiate drug toxicity. In this article, we review the evidence behind the use of common cardiovasctdar medications in elderly patients and discuss pertinent clinical challenges.

关键词： Cardiac Drugs Elderly

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

Predicting and Curing Depression Using Long Short Term Memory and Global Vector

引用

Computers, Materials & Continua 2023年第3期74卷 5837-5852页

作者： ayan Kumar Abdul Quadir Md J.Christy Jackson Celestine Iwendi School of Computer Science and Engineering Vellore Institute of TechnologyChennai600127India School of Creative Technologies University of BoltonBoltonUK

In today’s world, there are many people suffering from mentalhealth problems such as depression and anxiety. If these conditions are notidentified and treated early, they can get worse quickly and have far-reachingnegative effects. Unfortunately, many people suffering from these conditions,especially depression and hypertension, are unaware of their existence until theconditions become chronic. Thus, this paper proposes a novel approach usingBi-directional Long Short-Term Memory (Bi-LSTM) algorithm and GlobalVector (GloVe) algorithm for the prediction and treatment of these *** and fitness bands can be equipped with these algorithms whichcan share data with a variety of IoT devices and smart systems to betterunderstand and analyze the user’s condition. We compared the accuracy andloss of the training dataset and the validation dataset of the two modelsnamely, Bi-LSTM without a global vector layer and with a global vector *** was observed that the model of Bi-LSTM without a global vector layer hadan accuracy of 83%,while Bi-LSTMwith a global vector layer had an accuracyof 86% with a precision of 86.4%, and an F1 score of 0.861. In addition toproviding basic therapies for the treatment of identified cases, our model alsohelps prevent the deterioration of associated conditions, making our methoda real-world solution.

关键词： Emotion dynamics depression heart rate internet of things global vector long short term memory machine learning sentiment analysis

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

Charged quark stars in f(R,T)gravity

引用

Chinese Physics C 2022年第11期46卷 308-317页

作者： Juan M.Z.Pretel Takol Tangphati ayan Banerjee Anirudh Pradhan Centro Brasileiro de Pesquisas Físicas Rua Dr.Xavier Sigaud150 URCARio de Janeiro CEP 22290-180RJBrazil Theoretical and Computational Physics Group Theoretical and Computational Science Center(TaCS)Faculty of ScienceKing Mongkut’s University of Technology Thonburi126 Prachauthid Rd.Bangkok 10140Thailand Astrophysics and Cosmology Research Unit School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa Centre for Cosmology Astrophysics and Space ScienceGLA UniversityMathura-281406Uttar PradeshIndia

Recent advances in nuclear theory and new astrophysical observations have led to the need for specific theoretical models applicable to dense-matter physics *** chromodynamics(QCD)predicts the existence of non-nucleonic degrees of freedom at high densities in neutron-star matter,such as quark *** a confining quark matter model,which consists of homogeneous,neutral 3-flavor interacting quark matter with O(m_(s)^(4))corrections,we examine the structure of compact stars composed of a charged perfect fluid in the context of f(R,T)*** system of differential equations describing the structure of charged compact stars has been derived and numerically solved for a gravity model with f(R,T)=R+2β*** simplicity,we assumed that the charge density is proportional to the energy density,namely,ρ_(ch)=αρ.It is demonstrated that the matter-geometry coupling constant β and charge parameter α affect the total gravitational mass and the radius of the star.

关键词： charged stars f(R T)gravity

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

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：