检索结果-南通市图书馆

Assessing the microbiota of recycled bedding sand on a Wisconsin dairy farm

journal of Animal Science and Biotechnology 2022年第2期13卷 601-612页

作者： Hannah E.Pilch Andrew j.Steinberger Donald C.Sockett Nicole Aulik Garret Suen charles j.czuprynski Department of Pathobiological Sciences School of Veterinary MedicineUniversity of Wisconsin-MadisonMadison 53706USA Department of Bacteriology University of Wisconsin-MadisonMadison 53706USA Microbiology Doctoral Training Program University of Wisconsin-MadisonMadison 53706USA Wisconsin Veterinary Diagnostic Laboratory School of Veterinary MedicineUniversity of Wisconsin-MadisonMadison 53706USA

Background:Sand is often considered the preferred bedding material for dairy cows as it is thought to have lower bacterial counts than organic bedding materials and cows bedded on sand experience fewer cases of lameness and *** can also be efficiently recycled and reused,making it ***,some studies have suggested that the residual organic material present in recycled sand can serve as a reservoir for commensal and pathogenic bacteria,although no studies have yet characterized the total bacterial community *** we sought to characterize the bacterial community composition of a Wisconsin dairy farm bedding sand recycling system and its dynamics across several stages of the recycling process during both summer and winter using 16S rRNA gene amplicon ***:Bacterial community compositions of the sand recycling system differed by both seasons and *** samples had higher richness and distinct community compositions,relative to winter *** both summer and winter samples,the diversity of recycled sand decreased with time drying in the recycling ***,summer sand 14 d post-recycling was enriched in operational taxonomic units(OTUs)belonging to the genera Acinetobacter and Pseudomonas,relative to freshly washed sand and sand from cow *** contrast,no OTUs were found to be enriched in winter *** sand recycling system contained an overall core microbiota of 141 OTUs representing 68.45%±10.33%SD of the total bacterial relative abundance at each sampled *** 4 most abundant genera in this core microbiota included Acinetobacter,Psychrobacter,Corynebacterium,and *** was present in greater abundance in summer samples,whereas Psychrobacter and Corynebacterium had higher relative abundances in winter *** had consistent relative abundances across both ***:These findings highlight the potential of recycled bedding sand as a bacterial reservo

关键词： Bovine Dairy farm Microbiota Recycled bedding sand 16S rRNA sequencing

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

One hundred years of population ecology:Successes,failures and the road ahead

引用

Integrative Zoology 2015年第3期10卷 233-240页

作者： charles j.KREBS Department of Zoology University of British ColumbiaVancouverCanada and Institute for Applied EcologyUniversity of CanberraCanberraAustralia

Population ecology is the most mature of the three subdisciplines of ecology partly because it has a solid mathematical foundation and partly because it can address the primary questions of distribution and abundance with experimental *** there is much left to do to integrate our population knowledge into community and ecosystem ecology to help address the global issues of food security and the conservation of *** different approaches are now being developed to bring about this integration and much more research will be necessary to decide which if any will be most useful in achieving our goals of explaining the changes we see in the distribution and abundance of animals and *** web ecology would appear to be the best approach at present because it uses the detailed information of the population ecology of particular species in combination with data on consumer-resource interactions to apply to the applied problems of biodiversity conservation,food security,pest management and disease *** we can use our understanding of population ecology to address the practical problems of our time in a creative way,we will benefit both the human population and the Earth’s *** remains to be done.

关键词： abundance geographic distributions history of ecology population models

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

Invasion of the biosphere by synthetic polymers:What our current knowledge may mean for our future

引用

Acta Oceanologica Sinica 2019年第5期38卷 161-164页

作者： charles j.Moore Algalita Marine Research and Education

In 1974,a member of the Council of the British Plastics Federation and a fellow of the Plastics Institute,stated that“Plastics litter is a very small proportion of all litter and causes no harm to the environment except as an eyesore”(Derraik,2002).It has taken less than fifty years for that opinion to be completely discredited,indeed,that opinion was already in doubt the moment it was ***,it was the strong denial by the plastic industry that plastics could cause harm that delayed the study of plastic’s environmental effects for *** until Moore et al.(2001)found six times as much plastic as zooplankton by weight in the surface waters of the North Pacific Subtropical Gyre(NPSG).

关键词： Invasion the biosphere our future

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 grid size on predictions of bed expansion in bubbling fluidized beds of Geldart B particles： A generalized rule for a grid-independent solution of TFM simulations

引用

Particuology 2017年第5期15卷 61-69页

作者： M. Helal Uddin charles j. Coronella Department of Chemical and Materials Engineering University of Nevada Reno NV 89557 USA

Numerical simulations of gas-solid fluidized beds based on the kinetic theory of granular flow exhibit a significant dependence on domain discretization. Bubble formation, bubble size and shape all vary greatly with the discretization, and the use of an inappropriate scale resolution leads to inaccurate predictions of fluidization hydrodynamics. In this study, grid-independent solutions of the two fluid model were examined by comparing the bed expansions obtained from numerical simulations with experimental results and empirical predictions, based on bubbling fluidized beds of Geldart B particles. Grid indepen- dence was achieved with a grid resolution equal to 18 times the particle diameter. The simulation results were compared with previously published data for verification purposes. The results of this work should provide a guideline for choosing the appropriate grid size and thereby minimize the time and expense associated with large simulations.

关键词： Mesh effectHydrodynamicsComputational fluid dynamicsEuler-Euler method MFIX

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

Rodents galore:Third International Conference on Rodent Biology and Management

引用

Integrative Zoology 2006年第4期1卷 194-195页

作者： charles j.KREBS Department of Zoology University of British ColumbiaVancouverCanada

The Third International Conference on Rodent Biology and Management was held in Hanoi,Vietnam,from 28 August to 1 September 2006,with 130 scientists from 32 countries *** focus of the conference was to bring together pure and applied scientists dealing with rodent ecology,rodent pests,and rodent conservation in one framework to encourage scientific *** conference followed highly successful conferences in Beijing in 1998 and in Canberra in 2003.

关键词： dealing Management encourage

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

Release, Recycle, Rebuild： Cell-Wall Remodeling, Autodegradation, and Sugar Salvage for New Wall Biosynthesis during Plant Development

引用

Molecular Plant 2018年第1期11卷 31-46页

作者： William j. Barnes charles T. Anderson Department of Biology Center for Ugnocellulose Structure and Formation The Pennsylvania State University University Park PA 16802 USA

Plant cell walls contain elaborate polysaccharide networks and regulate plant growth, development, mechanics, cell-cell communication and adhesion, and defense. Despite conferring rigidity to support plant structures, the cell wall is a dynamic extracellular matrix that is modified, reorganized, and degraded to tightly control its properties during growth and development. Far from being a terminal carbon sink, many wall polymers can be degraded and recycled by plant cells, either via direct re-incorporation by trans- glycosylation or via internalization and metabolic salvage of wall-derived sugars to produce new precur- sors for wall synthesis. However, the physiological and metabolic contributions of wall recycling to plant growth and development are largely undefined. In this review, we discuss long-standing and recent evi- dence supporting the occurrence of cell-wall recycling in plants, make predictions regarding the develop- mental processes to which wall recycling might contribute, and identify outstanding questions and emerging experimental tools that might be used to address these questions and enhance our understanding of this poorly characterized aspect of wall dynamics and metabolism.

关键词： Plant cell walls wall degradation wall recycling wall biosynthesis

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

Thermodynamic Foundation for High Temperature Electrochemistry

引用

Chemical Research in Chinese Universities 2004年第4期20卷 494-500页

作者： ZHANG W. E. A. charles j. Congleton Corrosion Research Group School of Chemical Engineering & Advanced Materials University of Newcastle upon TyneCorrosion Research Group School of Chemical Engineering & Advanced Materials University of Newcastle upon TyneCorrosion Research Group School of Chemical Engineering & Advanced Materials University of Newcastle upon Tyne NE1 7RU UK NE1 7RU UKNE1 7RU UK

Thermodynamic concepts required for the thermodynamic calculation of the potentials of electrodes for high temperature applications are briefly reviewed. A thermodynamic approach to the calculation of half cell potentials and the standard chemical potential of an electron at high temperatures which are related to the Standard Hydrogen Electrode(SHE) is discussed. As examples, an external Ag/AgCl reference electrode and a YSZ(Ag|O_2) pH sensor for high temperature applications are analyzed by using the thermodynamic approach to derive a high temperature pH measurement equation. The two electrodes are employed to measure high temperature pH and the measured pH was compared with the calculated pH by using a solution chemistry method. Concepts and principles for electrode kinetics are also briefly introduced and a modification to the Tafel equations is suggested.

关键词： High temperature potential Half cell potential External Ag/AgCl reference electrode Standard chemical potential of an electron High temperature pH sensor.

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

Kinematic analysis of penile reflexes in a rat model of spinal cord injury

引用

Asian journal of Andrology 2021年第1期23卷 30-35页

作者： Casey j Steadman Sai S Vangoor charles H Hubscher Department of Anatomical Sciences and Neurobiology University of LouisvilleLouisvilleKY 40202USA Kentucky Spinal Cord Injury Research Center LouisvilleKY 40202USA.

The ex-copula penile dorsiflexion reflex(PDFR)is an established measure of sexual dysfunction in male rat models of spinal cord *** the PDFR after complete spinal transection is well described,information regarding the more clinically relevant incomplete spinal contusion injury model is *** study examined,using two-dimensional(2D)kinematic analysis,the relationship between the PDFR and degree of white matter sparing(WMS).Male Wistar rats received a T9 contusion with varying degrees of impactor *** kinematic recordings of the PDFR were made 3-8 weeks *** reflex components examined included maximum angle of penile dorsiflexion,total penile event duration,and penile ascent *** hoc comparison between animals grouped based upon injury severity(moderate-severe:13.33%-17.15%WMS vs moderate:20.85%-33.50%WMS)ndicated PDFR ***,the numbers of animals with more moderate contusions having data points above the median n both maximum angle of penile dorsiflexion and penile ascent speed were significantly lower than animals with more severe *** penile event duration was also affected but only at more chronic time points(6-8 weeks).Thus,2D kinematic analysis of the PDFR allows for more consistent and quantifiable analysis of the subtle differences that can occur between injury severity groups in the rat contusion model.

关键词： erection penile sexual dysfunction spinal cord injury

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

A shifting adversary:control of pancreatic cancer transcriptomic subtypes

引用

journal of Cancer Metastasis and Treatment 2022年第1期8卷 253-264页

作者： charles j.David Department of Basic Medicine Tsinghua University School of MedicineBeijing 100084China

Cellular plasticity,the dynamic ability of cells to adopt distinct transcriptional states,plays a well-known role in the pancreas during the initiation of pancreatic ductal adenocarcinoma(PDA),the most common form of pancreatic *** is now becoming clear that plasticity also plays an important role after the emergence of *** is composed of two major transcriptional subtypes,classical and basal-like,with important biological *** work has indicated that individual tumors can be comprised of cells of each subtype,and that tumor subtype can change during the evolution of a *** suggests that PDA cells can transit between transcriptional states,with important implications for disease *** review discusses what is currently known about inter-subtype plasticity and how this process is controlled.

关键词： Pancreatic ductal adenocarcinoma transcriptional subtypes classical basal-like squamous quasi-mesenchymal cellular plasticity transcription factors tumor microenvironment

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

Investigation of Single and Multiple Mutations Prediction Using Binary Classification Approach

引用

Intelligent Automation & Soft Computing 2023年第4期36卷 1189-1203页

作者： T.Edwin Ponraj j.charles Department of Computer Applications Noorul Islam Centre for Higher EducationKumaracoil629180India Department of Software Engineering Noorul Islam Centre for Higher EducationKumaracoil629180India

The mutation is a critical element in determining the proteins’stability,becoming a core element in portraying the effects of a drug in the pharmaceutical *** wet laboratory tests to provide a better perspective on protein mutations is expensive and time-intensive since there are so many potential muta-tions,computational approaches that can reliably anticipate the consequences of amino acid mutations are *** work presents a robust methodology to analyze and identify the effects of mutation on a single protein ***,the context in a collection of words is determined using a knowledge graph for feature selection *** proposed prediction is based on an easier and sim-pler logistic regression inferred binary classiﬁcation *** approach can able to obtain a classiﬁcation accuracy(AUC)Area Under the Curve of 87%when randomly validated against experimental energy ***,for each cross-fold validation,the precision,recall,and F-Score are *** results support the validity of our strategy since it performs the vast majority of prior studies in this domain.

关键词： Proteins data science mutation analysis random forest neighbor proteins single and double mutations

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：