检索结果-南通市图书馆

Asian pacific journal of Reproduction 2019年第6期8卷 297-298页

作者： Emma P Langdon Yan-he Liu Phillip L Matson peter j mark School of Human Sciences the University of Western AustraliaCrawleyWestern Australia 6009Australia School of Medical and Health Science Edith Cowan UniversityJoondalupWestern Australia 6027Australia Reproductive Medicine Center Tianjin United Family HospitalTianjinChina Fertility North Joondalup Private HospitalJoondalupWestern Australia 6027Australia

Dear Editor,Time-lapse videography of human embryos allows for the easy visualization of the embryos without removing them from the protective environment of the incubator[1],the measurement of various morphokinetic(quantitative)parameters[2],and the identification of abnormalities of growth(qualitative parameters)such as direct cleavage[3],reverse cleavage[4]and intercellular contact of blastomeres[5].

关键词： Human embryos Blastomere rotation Time-lapse videography

ABB公司的创新型模块化感应牵引电动机适应性达到了新的高度

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电气牵引 2012年第2期 35-37,66页

作者： peter j Isberg mark Curtis

列车通常是适应不同的铁路运输提供商的各自技术规格而定制的。每一个新的设计需要另外的独立原始设备制造商（OEM）提供各种独特的列车专用部件。传统上，牵引电动机是车辆制造商所需的众多定制部件之一。这些电动机需要精心设计，以... 详细信息

列车通常是适应不同的铁路运输提供商的各自技术规格而定制的。每一个新的设计需要另外的独立原始设备制造商（OEM）提供各种独特的列车专用部件。传统上，牵引电动机是车辆制造商所需的众多定制部件之一。这些电动机需要精心设计，以确保其功能和品质，从而导致增加了整个价值链中的复杂性，对制造所需的时间造成了负面影响。为了克服这些问题，ABB公司研发了新系列的内置灵活的感应牵引电动机，以便采用单个模块设计来满足特定客户的需求。

关键词：牵引电动机 ABB公司感应原始设备制造商适应性模块化创新型模块设计

Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2913-2914页

作者： William j.Flerlage mark L.Dell’Acqua Brian M.Cox Fereshteh S.Nugent Uniformed Services University of the Health Sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(Simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

Late Paleozoic–Early Mesozoic tectonic evolution of the Zongwulong Shan-Qinghai Nanshan tectonic belt in the northern Qaidam continent， northern Tibet

在线全文

学校读者我要写书评

暂无评论

journal of Earth Science 2025年

作者： Yonghui Zhao Chen Wu jie Li peter j.Haproff Lin Ding State Key Laboratory of Tibetan Plateau Earth System and Resources Environment (TPESRE)， Institute of Tibetan Plateau Research， Chinese Academy of Sciences University of Chinese Academy of Sciences Chongqing Key Laboratory of Complex Oil and Gas Field Exploration and Development， Chongqing University of Science and Technology Department of Earth and Ocean Sciences， University of North Carolina Wilmington

The Zongwulong Shan-Qinghai Nanshan tectonic belt of the northern Tibet Plateau experienced a protracted tectonic history， including the openings and closures of the Proto- and Paleo-Tethyan Oceans. Although the tectonic belt has been extensively studied， details regarding the tectonic processes involved in its development remain controversial. To better constrain the tectonic processes of this tectonic belt， we conducted detailed field geological mapping， zircon U-Pb geochronology， and whole-rock geochemical and Sr-Nd isotopic analyses. Our results show that intrusive rocks in the tectonic belt crystallized in ca. 292–233 Ma， perhaps in an arc/subduction setting. Geochemical and Sr-Nd isotopic data suggest that early Permian–late Triassic ultramafic-intermediate intrusions were sourced from the enriched mantle， whereas intermediate-acidic rocks were sourced from mixed crust-mantle. We present the tectonic model that involves: (1) Early Devonian–early Permian intracontinental extension occurred in the northern margin of the Qaidam continent (ca. 416 Ma–292 Ma); (2) Early Permian–late Triassic northward subduction of the Paleo-Tethyan Ocean resulted in arc magmatism (ca. 292 Ma–233 Ma); and (3) subsequent late Triassic intracontinental extension (ca. 233 Ma–215 Ma). Our results suggest that the late Paleozoic–early Mesozoic development of the Zongwulong Shan-Qinghai Nanshan was related to the opening， subduction， and slab retreat of the Paleo-Tethyan Ocean， which has key implications for the tectonic evolution of the northern Tibetan Plateau.

关键词：

Dielectric confinement on exciton binding energy and nonlinear optical properties in a strained Zn_(1-x_(in))Mg_(x(in))Se/Zn_(1-x(out))Mg_(x(out))Se quantum well

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of Semiconductors 2012年第9期33卷 1-7页

作者： j.Abraham Hudson mark A.john peter Department of Physics NPR Arts&Science CollegeNathamDindigul-624401India Department of Physics Government Arts CollegeMelur-625106MaduraiIndia

The band offsets for a Zn1-xin Mgxin Se/Zn1-xout Mgxout Se quantum well heterostructure are determined using the model solid theory. The heavy hole exciton binding energies are investigated with various Mg alloy contents. The effect of mismatch between the dielectric constants between the well and the barrier is taken into account. The dependence of the excitonic transition energies on the geometrical confinement and the Mg alloy is discussed. Non-linear optical properties are determined using the compact density matrix approach. The linear, third order non-linear optical absorption coefficient values and the refractive index changes of the exciton are calculated for different concentrations of magnesium. The results show that the occurred blue shifts of the resonant peak due to the Mg incorporation give the information about the variation of two energy levels in the quantum well width.

关键词： interband emission energy exciton binding energy quantum well

The current perspective of the PA 1957 gas well pillar study and its implications for longwall gas well pillars

在线全文

学校读者我要写书评

暂无评论

International journal of Mining Science and Technology 2021年第1期31卷 117-126页

作者： peter Zhang Daniel Su Chris mark CDC NIOSH Pittsburgh Mining Research DivisionPittsburghPA 15236USA Mine Safety and Health Administration PittsburghPA 15217USA

Many states rely upon the Pennsylvania 1957 Gas Well Pillar Study to evaluate the coal barrier surrounding gas *** study included 77 gas well failure cases that occurred in the Pittsburgh and Freeport coal seams over a 25-year *** the time,coal was mined using the room-and-pillar mining method with full or partial pillar recovery,and square or rectangle pillars surrounding the gas wells were left to protect the *** study provided guidelines for pillar sizes under different overburden depths up to 213 m(700 ft).The 1957 study has also been used to determine gas well pillar sizes in longwall mines since longwall mining began in the 1970 *** original study was developed for room-and-pillar mining and could be applied to gas wells in longwall chain pillars under shallow ***,under deep cover,severe deformations in gas wells have occurred in longwall chain ***,with a better understanding of coal pillar mechanics,new insight into subsidence movements induced by retreat mining,and advances in numerical modeling,it has become both critically important and feasible to evaluate the adequacy of the 1957 study for longwall gas well *** this paper,the data from the 1957 study is analyzed from a new perspective by considering various factors,including overburden depth,failure location,failure time,pillar safety factor(SF),and floor *** pillar SF and floor pressure are calculated by considering abutment pressure induced by full pillar recovery.A statistical analysis is performed to find correlations between various factors and helps identify the most significant factors for the stability of gas wells influenced by retreat *** analyzing the data from the 1957 study,the guidelines for gas well pillars in the 1957 study are evaluated for their adequacy for roomand-pillar mining and their applicability to longwall *** modeling is used to model the stability of gas wells by quantifying the mining-induced s

关键词： Gas well pillar Pennsylvania 1957 gas well pillar study Room-and-pillar mining Longwall mining

Claudin-11 and occludin are major contributors to Sertoli cell tight junction function, in vitro

在线全文

学校读者我要写书评

暂无评论

Asian journal of Andrology 2016年第4期18卷 620-626页

作者： mark j McCabe Caroline FH Foo Marcel E Dinger peter M Smooker peter G Stanton Male Fertility Regulation Laboratory Hudson Institute of Medical Research Monash Medical Centre Clayton Victoria 3168 Australia School of Applied Sciences Royal Melbourne Institute of Technology University Bundoora Victoria 3088 Australia Kinghorn Centre for Clinical Genomics Garvan Institute of Medical Research Darlinghurst New South Wales 2010 Australia St Vincent's Clinical School UNSW Sydney New South Wales 2052 Australia.

The Sertoli cell tight junction （T j） is the key component of the blood-testis barrier, where it sequesters developing germ cells undergoing spermatogenesis within the seminiferous tubules. Hormonally regulated claudin-11 is a critical transmembrane protein involved in barrier function and its murine knockout results in infertility. We aimed to assess quantitatively the significance of the contribution of claudin-11 to Tj function, in vitro, using siRNA-mediated gene silencing. We also conducted an analysis of the contribution of occludin, another intrinsic transmembrane protein of the Tj. Silencing of claudin-11 and/or occludin was conducted using siRNA in an immature rat Sertoli cell culture model. Transepithelial electrical resistance was used to assess quantitatively Tj function throughout the culture. Two days after siRNA treatment, cells were fixed for immunocytochemical localization of junction proteins or lyzed for RT-PCR assessment of mRNA expression. Silencing of claudin-11, occludin, or both resulted in significant decreases in Tj function of 55% （P 〈 0.01）, 51% （P 〈 0.01）, and 62% （P 〈 0.01）, respectively. Data were concomitant with significant decreases in mRNA expression and marked reductions in the localization of targeted proteins to the Sertoli cell Tj. We provide quantitative evidence that claudin-11 contributes significantly （P 〈 0.01） to Sertoli cell Tj function in vitro. Interestingly, occludin, which is hormonally regulated but not implicated in infertility until late adulthood, is also a significant （P 〈 0.01） contributor to barrier function. Our data are consistent with in vivo studies that clearly demonstrate a role for these proteins in maintaining normal Tj barrier structure and function.

关键词： blood-testis barrier claudin-11 occludin Sertoli cell tight junction siRNA

Rapid range expansion predicted for the Common Grackle(Quiscalus quiscula)in the near future under climate change scenarios

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Avian Research 2021年第4期12卷 569-575页

作者： peter Capainolo Utku Perktaş mark DEFellowes Division of Vertebrate Zoology-Department of Ornithology American Museum of Natural HistoryCentral Park West@79th StreetNew YorkNY 10024-5192USA People and Wildlife Research Group School of Biological SciencesUniversity of ReadingWhiteknightsReading RG66ASUK Depart-ment of Biology(Zoology Section Biogeography Research Laboratory)Faculty of ScienceHacettepe UniversityBeytepe06800 AnkaraTurkey

Background:Climate change due to anthropogenic global warming is the most important factor that will affect future range distribution of species and will shape future biogeographic *** much effort has been expended in understanding how climate change will affect rare and declining species we have less of an understanding of the likely consequences for some abundant *** Common Grackle(Quiscalus quiscula;Linnaeus 1758),though declining in portions of its range,is a widespread blackbird(Icteridae)species in North America east of the Rocky *** study examined how climate change might affect the future range distribution of Common ***:We used the R package Wallace and six general climate models(ACCESS1-0,BCC-CSM1-1,CESM1-CAM5-1-FV2,CNRM-CM5,MIROC-ESM,and MPI-ESM-LR)available for the future(2070)to identify climatically suitable areas,with an ecological niche modelling approach that includes the use of environmental ***:Future projections suggested a significant expansion from the current range into northern parts of North America and Alaska,even under more optimistic climate change ***,there is evidence of possible future colonization of islands in the Caribbean as well as coastal regions in eastern Central *** most important bioclimatic variables for model predictions were Annual Mean Temperature,Temperature Seasonality,Mean Temperature of Wettest Quarter and Annual ***:The results suggest that the Common Grackle could continue to expand its range in North America over the next 50 *** research is important in helping us understand how climate change will affect future range patterns of widespread,common bird species.

关键词： Annual mean temperature Climate change Common Grackle Ecological niche modelling Range shift Seasonality

Assessing ecological and physiological costs of melanism in North American Papilio glaucus females: two decades of dark morph frequency declines

在线全文

学校读者我要写书评

暂无评论

Insect Science 2020年第3期27卷 583-612页

作者： j.mark Scriber Department of Entomology Michigan State UniversityEast LansingMichiganUSA McGuire Center for Lepidoptera and Biodiversity Florida Museum of Natural HistoryUniversity of FloridaGainesvilleFloridaUSA

Polymorphisms for melanic form of insects may provide various selective ***,melanic alleles may have significant/subtle pleiotrophic“costs.”Several potential pleiotrophic effects of the W(=Y)‐linked melanism gene in Papilio glaucus L.(Lepidoptera)showed no costs for melanic versus yellow in adult size,oviposition preferences,fecundity,egg viability,larval survival/growth rates,cold stress tolerance,or postdiapause emergence *** selection(males choosing yellow rather than mimetic dark females)had been suggested to provide a balanced polymorphism in ***,but spermatophore counts in wild females and direct field tethering studies of size‐matched pairs of virgin females(dark and yellow),show that male preferences are random or frequency‐dependent from Florida to Michigan,providing no yellow counter‐*** frequency declines of dark(melanic/mimetic)females in *** populations are shown in several major populations from Florida(27.3°N latitude)to Ohio(38.5°N).Summer temperatures have increased significantly at all these locations during this time(1999–2018),but whether dark morphs may be more vulnerable(in any stage)to such climate warming remains to be *** potential reasons for the frequency declines in mimetic females are discussed:(i)genetic introgression of Z‐linked melanism suppressor genes from ***(R&j)and the hybrid species,***(Pavulaan&Wright),(ii)differential developmental incompatibilities,or Haldane effects,known to occur in hybrids,(iii)selection against intermediately melanic(“dusty”)females(with the W‐linked melanic gene,b+)which higher temperatures can cause.

关键词： climate warming ecology of melanism incomplete mimicry pleiotrophic costs

Natural forests in New Zealand–a large terrestrial carbon pool in a national state of equilibrium

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Forest Ecosystems 2021年第3期8卷 458-478页

作者： Thomas Paul mark O.Kimberley peter N.Beets Scion Private Bag 3020Rotorua 3046New Zealand Environmental Statistics Ltd Whangapararoa 0930New Zealand retired(previously Scion) Rotorua 3010New Zealand

Background:Natural forests cover approximately 29%of New Zealand’s landmass and represent a large terrestrial carbon *** 2002 New Zealand implemented its first representative plot-based natural forest inventory to assess carbon stocks and stock changes in these mostly undisturbed old-growth *** previous studies have provided estimates of biomass or carbon stocks,these were either not fully representative or lacked data from important pools such as dead wood(coarse woody debris).The current analysis provides the most complete estimates of carbon stocks and stock changes in natural forests in New ***:We present estimates of per hectare carbon stocks and stock changes in live and dead organic matter pools excluding soil carbon based on the first two measurement cycles of the New Zealand Natural Forest Inventory carried out from 2002 to *** show that New Zealand’s natural forests are in balance and are neither a carbon source nor a carbon *** average total carbon stock was 227.0±14.4 tC·ha^(−1)(95%C.I.)and did not change significantly in the 7.7 years between measurements with the net annual change estimated to be 0.03±0.18 tC·ha^(−1)·yr^(−1).There was a wide variation in carbon stocks between forest *** forest had an averaged carbon stock of only 53.6±9.4 tC·ha^(−1) but had a significant sequestration rate of 0.63±0.25 tC·ha^(−1)·yr^(−1),while tall forest had an average carbon stock of 252.4±15.5 tC·ha^(−1),but its sequestration rate did not differ significantly from zero(−0.06±0.20 tC·ha^(−1)·yr^(−1)).The forest alliance with the largest average carbon stock in above and below ground live and dead organic matter pools was silver beech-red beech-kamahi forest carrying 360.5±34.6 tC·ha^(−1).Dead wood and litter comprised 27%of the total carbon ***:New Zealand’s Natural Forest Inventory provides estimates of carbon stocks including estimates for difficult to measure pools such as dead wood and roots.I

关键词： Forest inventory Natural forests Carbon stocks and change Terrestrial carbon pool