检索结果-南通市图书馆

Investigation of genome structure of a cinnamyl alcohol dehydrogenase locus in a basal angiosperm hardwood species, Liriodendron tulipifera L., reveals low synteny

引用

Journal of Systematics and evolution 2011年第5期49卷 396-405页

作者： scott e.SCHLARBAUM Department of Forestry Wildlife and FisheriesInstitute of AgricultureThe University of Tennessee

Basal angiosperms contain a wide diversity of floral and growth forms and gave rise to the largest recent angiosperm *** none of the basal angiosperm genomes has been sequenced,examining large bacterial artificial chromosome(BAC) inserts remains the main approach to providing a first glimpse of the structure and organization of their *** this study,we sequenced a 126.9-kbp BAC contig harboring a cinnamyl alcohol dehydrogenase gene(LtuCAD1) in a basal angiosperm species,Liriodendron tulipifera L.,an important timber tree species with significant ecological and economic values.A key enzyme in lignin biosynthesis,CAD catalyzes the final step in the synthesis of *** carried out phylogenetic analyses of seven full-length CAD family genes(LtuCAD1-7) obtained from a comprehensive Liriodendron expressed sequence tag *** phylogenetic tree suggests that LtuCAD1 is the primary CAD gene involved in lignifications as it is the only Liriodendron CAD grouped with the bona fide CADs *** well as the LtuCAD1,the BAC contig contained fragmented sequences for one integrase,eight hypothetical proteins,two gag-pol polyproteins,one RNase H family protein,and one chromatin binding *** analysis with other angiosperm species suggests that the genomic segment in this BAC has undergone frequent *** study is our initial step in identifying and understanding lignin biosynthesis genes from basal angiosperm *** knowledge can help bridge the information gap between hardwood(angiosperm) and softwood(gymnosperm) species and benefit potential breeding and biotechnology application for enhanced production of biomass and digestibility in ***.

关键词： BAC contig cinnamyl alcohol dehydrogenase(CAD) gene order lignin biosynthesis synteny.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

extract Rules by Using Rough set and Knowledge-Based NN

引用

Journal of Computer Science & Technology 1998年第3期13卷 279-284页

作者：王士同 e.scott 等 DepartmentofComputer EastChinaShipbuildingInstituteZhenjiang212003PR.China DepartmentofComputer Ro

In this paper, rough set theory is used to extract roughly-correct inference rules from information systems. Based on this idea, the learning algorithm eRCR is presented. In order to refine the learned roughly-correct inference rules, the knowledge-based neural network is used. The method presented here sufficiently combines the advanages of rough set theory and neural network.

关键词： Rough set theory ,knowledge-based NN (neural network) knowledge discovery machine learning

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

Purinergic signaling systems across comparative models of spinal cord injury

引用

Neural Regeneration Research 2022年第3期17卷 2391-2398页

作者： eva e.Stefanova Angela L.scott Department of Pathology and Molecular Medicine McMaster UniversityHamiltonONCanada

Within the last several decades,the scientific community has made substantial progress in elucidating the complex pathophysiology underlying spinal cord ***,despite the many advances using conventional mammalian models,both cellular and axonal regeneration following spinal cord injury have remained out of *** this sense,turning to non-mammalian,regenerative species presents a unique opportunity to identify pro-regenerative cues and chara cterize a spinal cord microenvironment permissive to *** the signaling pathways hypothesized to be dysregulated during spinal cord injury is the purinergic signaling *** addition to its well-known role as energy currency in cells,ATP and its metabolites are small molecule neurotransmitte rs that mediate many diverse cellular processes within the central nervous *** our unde rstanding of the roles of the purinergic system following spinal cord injury is limited,this signaling pathway has been implicated in all injury-induced secondary processes,including cellular death,inflammation,reactive gliosis,and neural *** that the purinergic system is also evolutionarily conserved between mammalian and non-mammalian species,comparisons of these roles may provide important insights into conditions responsible for recovery ***,we compare the secondary processes between key model species and the influence of purinergic signaling in each *** our understanding of this signaling system and pro-regenerative conditions continues to evolve,so does the potential for the development of novel therapeutic interventions for spinal cord injury.

关键词： cell death differenriation glia inflammation neurogenesis proliferation purinergic signaling reactive gliosis regeneration spinal cord injury teleost

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

Climate refugia along Lake Superior’s shores:disjunct arctic-alpine plants rely on cool shoreline temperatures but are restricted to highly exposed habitat under climate warming

引用

Journal of Plant ecology 2024年第4期17卷 23-41页

作者： Ashley Hillman scott e.nie.se. Department of Renewable Resources University of AlbertaEdmontonAB T6G 2R3Canada

Climate refugia can serve as a remnant habitat or stepping stones for species dispersal under climate *** largest freshwater lake by surface area,Lake Superior,USA and Canada,serves as a model system for understanding cooling-mediated local refugia,as its cool water temperatures and wave action have maintained shoreline habitats suitable for southern disjunct populations of arctic-alpine plants since ***,we seek to explain spatial patterns and environmental drivers of arctic-alpine plant refugia along Lake Superior’s shores,and assess future risk to refugia under moderate(+3.5℃)and warmest(+5.7℃)climate warming ***,we examined how the interactive effects of summer surface water temperatures and wind affected onshore temperatures,resulting in areas of cooler ***,we developed an ecological niche model for the presence of disjunct arctic-alpine refugia(pooling 1253 occurrences from 58 species)along the lake’s ***,we fit species distribution models for 20 of the most common arctic-alpine disjunct species and predicted presence to identify refugia ***,we used the two climate warming scenarios to predict changes in the presence of refugia and disjunct *** type,elevation above water,inland distance,July land surface temperature from MODIS/Terra satellite and near-shore depth of water were the best predictors of disjunct ***,we predicted 2236 km of the shoreline(51%)as disjunct refugia habitat for at least one species under current conditions,but this was reduced to 20% and 7% with moderate(894 km)and warmest(313 km)climate change projections.

关键词： climate refugia disjunct populations lake effect Lake Superior species distribution 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

A modified intron of VRT2 drives glume and grain elongation in wheat

引用

Molecular Plant 2021年第9期14卷 1421-1423页

作者： Laura e.Dixon scott A.Boden Faculty of Biological Sciences University of LeedsLeeds LS29JTUK School of Agriculture Food and WineWaite Research InstituteUniversity of AdelaideGlen OsmondSA 5064Australia

Yield is a complex trait that is determined predominantly by the number,size,and weight of grain produced by a plant,which are all in fluenced by multiple genes and environ mental *** cereals,grain size is in flue need by envir on mental signals including nutrient availability and temperature,and by variation for genes that control the dimensions of a grain or the size of floral organs(e.g.,Heang and Sassa,2012;Brinton et al.,2017;Adamski et al.,2021;Liu et al.,2021;Xiao et al.,2021).Three recent studies have investigated subspecies of tetrapioid and hexapioid wheat that produce Ion ger grains,which form in florets that contain elongated floral structures(Adamski et al.,2021;Liu et al.,2021;Xiao et al.,2021);their findings provide new understanding of the genes controlling floret architecture,which could be used by breeders to enhance grain size and yield.

关键词： grain organs wheat

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

Forge AHeAD with stricter criteria in future trials of embolic stroke of undetermined source

引用

Neural Regeneration Research 2022年第5期17卷 1009-1010页

作者： David Z.Rose scott e.Kasner Department of Neurology Morsani College of MedicineUniversity of South FloridaTampaFLUSA Department of Neurology Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA

What lurks within the crypt?With more than 200 known causes of is chemic stroke(Saver,2016),what should be the minimum work up?Many centers offer high-resolution brain imaging and vessel studies,telemetry monitoring f... 详细信息

关键词： strict thoracic centers

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

Hybrid Predictive ensembles:Synergies Between Human and Computational Forecasts

引用

Journal of Social Computing 2021年第2期2卷 89-102页

作者： Lu Hong PJ Lamberson scott e Page Department of Finance Loyola University ChicagoChicagoIL 606002USA Department of Communication University of California at Los Angeles(UCLA)Los AngelesCA 90095USA School University of MichiganAnn ArborMI 48104USA

An increasing proportion of decisions,design choices,and predictions are being made by hybrid groups consisting of humans and artificial intelligence(AI).In this paper,we provide analytic foundations that explain the potential benefits of hybrid groups on predictive tasks,the primary use of *** analysis relies on interpretive and generative signal frameworks as well as a distinction between the big data used by AI and the thick,often narrative data used by *** derive several conditions on accuracy and correlation necessary for humans to remain in the *** conclude that human adaptability along with the potential for atypical cases that mislead AI will likely mean that humans always add value on predictive tasks.

关键词： collective intelligence predictive models hybrid groups big data thick data

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

Region-specific microRNA signatures in the human epididymis

引用

Asian Journal of Andrology 2018年第6期20卷 539-544页

作者： James A Browne Shih-Hsing Leir scott e eggener Ann Harris Department of Genetics and Genome Sciences Case Western Reserve UniversityClevelandOH 44106USA Human Molecular Genetics Program Lurie Children＇s Research CenterChicagoIL 60614USA Department of Pediatrics Northwestern University Feinberg School of MedicineChicagoIL 60611USA section of Urology University of Chicago Medical CenterChicagoIL 60611USA.

The epithelium of the human epididymis maintains an appropriate luminal environment for sperm maturation that is essential for male fertility. Regional expression of small noncoding RNAs such as microRNAs contributes to segment-specific gene expression and differentiated functions. MicroRNA profiles were reported in human epididymal tissues but not specifically in the epithelial cells derived from those regions. Here, we reveal miRNA signatures of primary cultures of caput, corpus, and cauda epididymis epithelial cells and of the tissues from which they were derived. We identify 324 epithelial cell-derived microRNAs and 259 tissue-derived microRNAs in the epididymis, some of which displayed regionalized expression patterns in cells and/or tissues. Caput cell-enriched miRNAs included miR-573 and miR-155. Cauda cell-enriched miRNAs included miR-1204 and miR-770. Next, we determined the gene ontology pathways associated with in silico predicted target genes of the differentially expressed miRNAs. The effect of androgen receptor stimulation on miRNA expression was also investigated. These data show novel epithelial cell-derived miRNAs that may regulate the expression of important gene networks that are responsible for the regionalized gene expression and function of the epididymis.

关键词： caput cauda corpus human epididymis microRNA

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

Numerical modeling of the effects of roughness on flow and eddy formation in fractures

引用

Journal of Rock Mechanics and Geotechnical engineering 2017年第1期9卷 105-115页

作者： scott Briggs Bryan W. Karney Brent e. Sleep University of Toronto Toronto M5S 1A4 Canada

The effect of roughness on flow in fractures was investigated using lattice Boltzmann method(LBM).Simulations were conducted for both statistically generated hypothetical fractures and a natural dolomite fracture. The effect of increasing roughness on effective hydraulic aperture, Izbash and Forchheimer parameters with increasing Reynolds number(Re) ranging from 0.01 to 500 was examined. The growth of complex flow features, such as eddies arising near the fracture surface, was directly associated with changes in surface roughness. Rapid eddy growth above Re values of 1, followed by less rapid growth at higher Re values, suggested a three-zone nonlinear model for flow in rough fractures. This three-zone model, relating effective hydraulic conductivity to Re, was also found to be appropriate for the simulation of water flow in the natural dolomite fracture. Increasing fracture roughness led to greater eddy volumes and lower effective hydraulic conductivities for the same Re values.

关键词： Hydrogeology Fracture flow Fracture roughness Computational fluid dynamics Lattice Boltzmann method(LBM)

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

Tumor necrosis factor alpha inhibits in vitro bovine embryo development through a prostaglandin mediated mechanism

引用

Journal of Animal Science and Biotechnology 2012年第1期3卷 21-24页

作者： Lauren R Jackson Char e Farin scott Whisnant Department of Animal Science North Carolina State University PO Box 7621 Raleigh NC 27695-7621 USA

Mastitis or other infectious diseases have been related to reduced fertility in cattle. Inflammatory cytokines such as tumor necrosis factor α （TNFα are released in response to infection and may have negative effects on embryo development, in the current study the effect of exposure to TNFα on the development of in vitro fertilized bovine embryos was examined. Indomethacin, a prostaglandin synthesis inhibitor, was used to determine if blockade of prostaglandin synthesis would alter the effects of TNFα Ovaries were obtained from a local abattoir and immature COC were isolated from 2-10 mm follicles, in vitro matured and fertilized. After fertilization, groups of presumptive zygotes were randomly placed into either control development medium, medium containing 25 ng/mL TNFα or medium containing 25 ng/mL TNFα plus 1 μg/mL indomethacin. The proportion of blastocysts formed was assessed at day 7 of culture. Fewer embryos exposed to TNFα alone reached the blastocyst stage （17.5 ± 2.4%, P 〈 0.01） compared with controls （30.5 ± 2.4%） or embryos developed in TNFα plus indomethacin （25.8 ± 2.8%）. There was no difference between control embryos and embryos developed in TNFα plus indomethacin. These results indicate that TNFα is inhibitory to the in vitro development of bovine embryos and that this inhibition may be mediated by prostaglandins because it can be blocked by indomethacin.

关键词： tumor necrosis factor o bovine embryo indomethacin

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：