检索结果-南通市图书馆

Plant Proteins Are Smaller Because They Are Encoded by Fewer Exons than Animal Proteins

Genomics, Proteomics & Bioinformatics 2016年第6期14卷 357-370页

作者： Obed ramirez-Sachez Paulino Perez-Rodriguez Luis Delaye Axel Tiessen Genetic Engineering Department CINVESTAV Unidad IrapuatoIrapuatoCP 36821Mexico Colegio de Postgraduados Campus MontecilloTexcocoCP 56230Mexico

Protein size is an important biochemical feature since longer proteins can harbor more domains and therefore can display more biological functionalities than shorter proteins. We found remarkable differences in protein length, exon structure, and domain count among different phylo- genetic lineages. While eukaryotic proteins have an average size of 472 amino acid residues （aa）, average protein sizes in plant genomes are smaller than those of animals and fungi. Proteins unique to plants are -81 aa shorter than plant proteins conserved among other eukaryotic lineages. The smaller average size of plant proteins could neither be explained by endosymbiosis nor subcellular compartmentation nor exon size, but rather due to exon number. Metazoan proteins are encoded on average by -10 exons of small size [-176 nucleotides （nt）]. Streptophyta have on average only -5.7 exons of medium size （-230 nt）. Multicellular species code for large proteins by increasing the exon number, while most unicellular organisms employ rather larger exons （〉 400 nt）. Among subcellular compartments, membrane proteins are the largest （-520 aa）, whereas the smallest proteins correspond to the gene ontology group of ribosome （-240 aa）. Plant genes are encoded by half the number of exons and also contain fewer domains than animal proteins on average. Interestingly, endosymbiotic proteins that migrated to the plant nucleus became larger than their cyanobacterial orthologs. We thus conclude that plants have proteins larger than bacteria but smaller than animals or fungi. Compared to the average of eukaryotic species, plants have -34% more but -20% smaller proteins. This suggests that photosynthetic organisms are unique and deserve therefore special attention with regard to the evolutionary forces acting on their genomes and proteomes.

关键词： Digital proteome Eukarya Evolution Viridiplantae Polypeptide length

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

Surface Modification by Nitrogen Plasma Immersion Ion Implantation on Austenitic AISI 304 Stainless Steel

引用

Journal of Iron and Steel Research International 2016年第4期23卷 380-384页

作者： Miguel CASTRO-COLIN William DURRER Jorge A. LOPEZ Enrique ramirez-HOMS Max Plank Institute for Intelligente Systems Stuttgart 70569Baden-wurttembergGermany Physics Department University of TexasEl Paso TX79968-0515TexasUSA

Surfaces of AISI 304 austenitic stainless steel plates nitrided by plasma immersion ion implantation （PⅢ） technology were studied by means of Auger electron spectroscopy （AES） and X-ray photoelectron spectroscopy （XPS） to determine the effect of the nitriding process on the surface and subjacent layers. Elemental compositions obtained by AES and XPS at varying depths indicate that the saturation of N is relatively constant as a function of depth, indicating the reliability of PⅢ technology for substirface saturation. It is concluded that the concentrations of both Cr and O increase with depth, the subjacent oxide is driven by the Ar^＋ sputtering process used to access the lower layers, and then N is bound to Cr.

关键词： PⅢ technology AISI 304 XPS AES surface modification

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

FINDING EVIDENCE OF GREEN LEASING IN UNITED STATES GOVERNMENT-LEASED PROPERTIES

引用

Journal of Green Building 2020年第1期15卷 55-72页

作者： Eunhwa Yang Juan Sebastian Guevara-ramirez Catherine Bisson School of Building Construction Georgia Institute of Technology

Although the term“green leasing”is not yet well defined,its primary purpose is *** an aim to create a collaborative environment through legal provisions between a building owner and a tenant,green leasing may ultimately help resolve the energy paradox in tenanted *** surrounding split-incentives are driven by a mismatch between owners’capital expenditures on improving building energy efficiency and an uncertainty of tenant or occupant behavior that might affect a building’s energy *** some countries have started to develop guidelines promoting the adoption of green leasing,especially in government buildings and commercial real estate,implementation has not been overly successful *** study has two focuses,the first of which is to compare green leasing guidelines from various countries and to suggest six comprehensive categories of green leasing components:management relationships,information sharing,certificates,legal stipulations,financial factors,and *** second core area of research places government-tenanted properties’lease agreement *** goal is to find any evidence in a legal condition between a building owner and a tenant,in this case federal government,to improve building energy efficiency with less environmental impact in the United *** findings of the study indicated 41 out of 400 leases had green *** out of six categories proposed in this study were found in the ***-tenanted properties,while the other three types were not *** findings of this study also suggest categories of green leasing clauses can contribute to defining green leasing and provide empirical evidence of green leasing in government-tenanted ***,this study produces arguments for possible reasoning behind the employment of some green lease categories but the lack of use of others,specifically in the *** market and government-tenanted buildings.

关键词： green leasing government-tenanted building energy efficiency

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

Dietary eubiotics of microbial muramidase and glycan improve intestinal villi,ileum microbiota composition and production trait of broiler

引用

Journal of Animal Science and Biotechnology 2024年第4期15卷 1723-1736页

作者： Sungbo Cho Shanmugam Suresh Kumar Santiago ramirez Rolando Valientes In Ho Kim Department of Animal Resource and Science Dankook UniversityCheonanChungnam 31116Korea Smart Animal Bio Institute Dankook University CheonanKorea DSM Nutritional Products Asia Pacific Mapletree Business CitySingapore 117440Singapore

Background Optimal gut health is important to maximize growth performance and feed efficiency in broiler chickens.A total of 1,365 one-day-old male Ross 308 broiler chickens were randomly divided into 5 treatments groups with 21 replicates,13 birds per *** present research investigated effects of microbial muramidase or a precision glycan alone or in combination on growth performance,apparent total tract digestibility,total blood carotenoid content,intestinal villus length,meat quality and gut microbiota in broiler *** included:NC:negative control(basal diet group);PC:positive control(basal diet+0.02%probiotics);MR:basal diet+0.035%microbial muramidase;PG:basal diet+0.1%precision glycan;and MRPG:basal diet+0.025%MR+0.1%PG,*** MRPG group increased the body weight gain and feed intake(P<0.05)compared with NC ***,it significantly increased total serum carotenoid(P<0.05)and MRPG altered the microbial diversity in ileum *** MRPG treatment group increased the abundance of the phylum Firmicutes,and family Lachnospiraceae,Ruminococcaceae,Oscillospiraceae,Lactobacillaceae,Peptostreptococcaceae and decreased the abundance of the phylum Campilobacterota,Bacteroidota and family *** with the NC group,the chickens fed MRPG showed significantly increased in duodenum villus length at end the *** In this study,overall results showed that the synergetic effects of MR and PG showed enhancing growth performance,total serum carotenoid level and altering gut microbiota composition of *** current research indicates that co-supplementation of MR and PG in broiler diets enhances intestinal health,consequently leading to an increased broiler production.

关键词： Broiler Intestinal morphology Microbial muramidase Precision glycan Probiotics

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

Nanoindentation of NiTi shape memory thin films at elevated temperatures

引用

International Journal of Smart and Nano Materials 2011年第1期2卷 39-49页

作者： Xu Huang Jiri Nohava Bin Zhang A.G.ramirez Department of Mechanical Engineering&Materials Science Yale UniversityNew HavenConnecticut06520USA CSM Instruments PeseuxSwitzerland

The shape memory effect and nanoindentation response of various phases of sputtered NiTi shape memory thin films were investigated as a function of *** phase transformation temperatures of NiTi films were observed to be sensitive to a compositional *** mechanical properties of NiTi thin films also presented a significant response to phase *** the same load,the maximum indentation depth for austenite is smaller than for martensite,indicating that martensite is softer than austenite.A martensite thin film was converted to austenite via in situ heating nanoindentation and displayed the mechanical properties similar to the austenite film at room *** results underscore the validity of elevated temperature nanoindentation methods as a means of interrogating the mechanical properties of materials that undergo thermally-induced phase *** details of the load–displacement curves are also described.

关键词： nanoindentation NiTi shape memory effect elastic modulus hardness phase transformation

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

Response to lipopolysaccharide in Octodon degus pups produces age-related sickness behavior but does not have effects in juveniles

引用

Integrative Zoology 2019年第3期14卷 235-247页

作者： Natalia ramirez-OTAROLA Janyra ESPINOZA Alexis M.KALERGIS Pablo SABAT Department of Ecological Sciences Science FacultyUniversidad de ChileSantiagoChile Millennium Institute Immunology and Immunotherapy Departamento de Genética Molecular y MicrobiologíaFacultad de Ciencias BiológicasPontificia Universidad Católica de ChileSantiagoChile Departamento de Endocrinología Facultad de MedicinaPontificia Universidad Católica de ChileSantiagoChile Department of Ecology Center of Applied Ecology&SustainabilityBiological Sciences FacultyPontificia Universidad Católica de ChileSantiagoChile

During vertebrate development,the immune function is inefficient and is mainly controlled by innate *** there have been detailed studies of various aspects of innate immune function,the effects of this function in the growth of vertebrates is still not well ***,there is little information regarding how early endotoxin exposure would affect juvenile phenotypes,specifically in a non-model mammal like a precocial *** evaluated the response to an antigen and its cost in offspring of the rodent Octodon *** inoculated pups at 4 different ages(8,15,22 and 30 days after birth)with an antigen to determine the ontogeny and costs of the response to an *** assessed changes in body mass,body temperature,sickness behavior and the levels of a key mediator of the inflammatory response,the cytokine interleukin-1β.We also determined the effects of early endotoxin exposure on the resting metabolic rate of juvenile animals(i.e.90 days after birth).The cytokine levels,body mass and body temperature were unaffected by time of inoculation and ***,pups subjected to inoculation at 22 days after birth with the antigen showed reduced loco*** resting metabolic rate was not affected by early endotoxin *** results suggest that the magnitude of *** responses would not change with *** discuss whether the lack of effect of the response on body mass or body condition is caused by environmental variables or by the precocial characteristics of ***.

关键词： acute phase response ecoimmunology lipopolysaccharide precocial sickness behavior

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

Effects of corn gluten feed inclusion at graded levels in a corn-soybean diet on the ileal and fecal digestibility of growing pigs

引用

Journal of Animal Science and Biotechnology 2015年第1期6卷 63-68页

作者： Gerardo Mariscal Landin Tercia Cesaria Reis de Souza Ericka ramirez Rodriguez Centro Nacional de Investigacion en Fisiologia Animal Instituto Nacional de Investigaciones Forestales Agricolas y PecuariasKm 1Carretera a ColonAjuchitlan ColonQueretaro 76280Mexico Facultad de Ciencias Naturales Universidad Autonoma de QueretaroSantiago de QueretaroAv.De las Ciencias s/n Juriquilla 76000QueretaroQueretaroMexico

Background： This study aimed to determine the effect of the inclusion of corn gluten feed （CGF） on the apparent and standardized ileal digestibility of protein and amino acids and the apparent ileal and total tract digestibility of energy in growing pigs. The study was performed using 16 barrows （weight, 45.3 ±4.5 kg） that were fitted with a T cannula at the terminal ileum. There were four treatments： a corn-soybean diet without CGF and three corn-soybean diets containing increasing levels of CGF （65, 130, and 195 g/kg）. Data were analyzed according to a randomized complete block design, four blocks with four pigs each （one pig per treatment）. The trend of the response （linear or quadratic） was determined using orthogonal contrasts, and when a linear effect was determined, a linear equation was obtained. Results： The results showed that the inclusion up to 195 g/kg of CGF in the corn-soybean diet did not diminish the ileal digestibility （apparent and standardized） of protein and amino acids （P 〉 0.05）, except that of phenylalanine, cystine, and proline. A linear decrease （P 〈 0.05） per gram of CGF added to the diet in the apparent and standardized ileal digestibility of phenylalanine （0.011 and 0.015 percentage units, respectively）, cystine （0.048 and 0.043 percentage units, respectively）, and proline （0.045 and 0.047 percentage units, respectively） was noted. Similarly, ileal digestibility of dry matter and energy were adversely affected （reduced by 0.028 and 0.025 percentage units, respectively, per gram of CGF increment in the diet）. A significant （P 〈 0.05） linear reduction in total tract digestibility with increase in CGF amount in the diet was observed for energy （0.027 percentage units）, dry matter （0.027 percentage units）, crude protein （0.020 percentage units）, and neutral detergent fiber （0.041 percentage units） per gram of CGF added to the diet. Conclusion： CGF did not affect the ileal digestibility of protein and most amino acids but reduced the ileal an

关键词： Amino acids Corn gluten feed Energy Ileal digestibility Pigs Total tract digestibility

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

Complementarity of electric vehicles and pumped-hydro as energy storage in small isolated energy systems:case of La Palma,Canary Islands

引用

Journal of Modern Power Systems and Clean Energy 2016年第4期4卷 604-614页

作者： Alfredo ramirez-DIAZ Francisco J.RAMOS-REAL Gustavo A.MARRERO Departamento de Economı´a Contabilidad y FinanzasFacultad de Economı´aEmpresa y TurismoUniversidad de La Laguna38071 La LagunaSpain Instituto Universitario de Ciencias Polı´ticas y Sociales Universidad de La Laguna38071 La LagunaSpain Instituto Universitario de Desarrollo Regional Universidad de La Laguna38071 La LagunaSpain

Isolated energy systems in archipelagos are characterized for having a great dependence on fossil sources due to isolation and territorial *** island of La Palma is situated on the northwest of the Canary Islands,and its electric system is very *** policies planned by local authorities are aimed to increase the share of renewable energies and the reduction of fossil ***,intermittence and the concentration of unmanageable renewable energies in few locations may hinder the operation of the *** order to solve these problems,energy storage plays an essential *** aim of this paper is to analyse the effects of the introduction of two possible alternatives as a way of energy storage:pumped hydro storage and electric *** this,we use a simulation model adapted to the features of La Palma,considering different *** show that,in the most favourable scenario,the installation of an additional 25 MW from renewables(more than double the current power),supported by 20 MW of pumped hydro storage and a fleet of 3361 electric vehicles,would allow the current share of renewables to increase from11%(in 2015)to 49%.Furthermore,this would mean a 26%reduction in CO2 emissions,10%in costs of generated k Wh and 19%in energy dependence.

关键词： Energy storage Electric vehicles Vehicle-to-grid Grid-for-vehicles Pumped-hydro energy storage Isolated systems

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

A simple capacitor model for radio emission associated with earthquakes

引用

Chinese Physics B 2004年第11期13卷 1975-1976页

作者： AresdePargaGonzalo ramirez-RojasAlejandro DepartamentodeFisica EscuelaSuperiordeFisicayMatemáticas.InstitutoPolitécnicoNacional.U.P.Zacatenco07738MéxicoD.F. DepartamentodeCienciasBásicas AreadeFislcadeProcesosIrreversiblesUniversidadAutónomaMetropolitana-AzcapotzalcoAv.SanPablo180Col.Reynosa02200MéxicoD.F.

In this brief report we propose a simple model based on the properties of an electric capacitor under short-circuit conditions as a possible mechanism of radio emissions associated with earthquakes. This model can be ... 详细信息

关键词： earthquakes radio emission

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

Towards rapid and automated vulnerability classification of concrete buildings

引用

Earthquake Engineering and Engineering Vibration 2023年第2期22卷 309-332页

作者： Lissette Iturburu Jean Kwannandar Shirley J.Dyke Xiaoyu Liu Xin Zhang Julio ramirez Lyles School of Civil Engineering Purdue UniversityWest LafayetteIN 47907United States School of Mechanical Engineering Purdue UniversityWest LafayetteIN 47907United States

With the overwhelming number of older reinforced concrete buildings that need to be assessed for seismic vulnerability in a city,local governments face the question of how to assess their building *** leveraging engineering drawings that are stored in a digital format,a well-established method for classification reinforced concrete buildings with respect to seismic vulnerability,and machine learning techniques,we have developed a technique to automatically extract quantitative information from the drawings to classify *** this technique,stakeholders will be able to rapidly classify buildings according to their seismic vulnerability and have access to information they need to prioritize a large building *** approach has the potential to have significant impact on our ability to rapidly make decisions related to retrofit and improvements in our *** the Los Angeles County alone it is estimated that several thousand buildings of this type *** Hassan index is adopted here as the method for automation due to its simple application during the classification of the vulnerable reinforced concrete *** paper will present the technique used for automating information extraction to compute the Hassan index for a large building inventory.

关键词： object detection segmentation U-Net vulnerability hazards earthquakes reinforced concrete building inventories and databases

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：