检索结果-南通市图书馆

molecular signaling of 5-hT<sub>1A</sub>and presence of serotonergic cells in the fetal cerebral cortex

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

world Journal of Neuroscience 2013年第2期3卷 76-82页

作者： Alfonso B. m. de Oca Gabriel m. Gutiérrez Jorge h. Rodríguez Laboratorio de Neurontogenia Departamento de Fisiología Biofísica y Neurociencias Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Ciudad de México México Unidad de Investigación Biomolecular Hospital de Cardiología Centro Médico Nacional Siglo XXI Instituto Mexicano del Seguro Social Ciudad de México México

Early appearance of the serotonergic system in the fetal brain and the various effects of serotonin (5-hT) on brain morphogenesis, have given support to a neurotrophic role of serotonin. This function of serotonin is accomplished through a system of serotonin nerve terminals in the target regions that involves various 5-hT receptors. In visual, auditory and somatosensory cortex an early and intense serotonergic innervation is particularly important. The neuronal somata of these terminals are normally located in the mesencephalon and they have not been observed in the maturing cerebral cortex, neither in the adult brain. By using immunolabeling techniques, fluorescence and confocal microscopy, we observe the presence of both, 5-hT terminals and 5-hT cells in mesencephalon (me, E17) and in the neopallium (Np, E13-E16) cocultures. Cells immunopositive to 5-hT and to tryptophan-5-hydroxilase are also observed in the Np on day 12 of culture. These results concerning the unexpected presence of serotonergic cells in the fetal cerebral cortex are interesting and may be of importance in corticogenesis. As it happens with other elements of the serotonergic system, the presence of these phenotypically serotonergic cells in the early cerebral cortex may be transitory and probably supporting cortex maturation processes. The molecular signaling path of the 5-hT1A receptor has also been identified.

关键词： Serotonergic System Serotonin Receptor 5-hT1A molecular Signaling Paths

Interactive Effects of Drought Stress and Phytohormones or Polyamines on Growth and Yield of Two m(<i>Zea maize</i>L) Genotypes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2011年第6期2卷 790-807页

作者： m. A. K. Shaddad m. hamdia Abd El-Samad h. T. mohammed 不详

Two maize genotypes (Nefertiti and Bashaier) were picked up from nine maize genotypes during the early vegetative growth (25 days) to be cultivated in open field upon the crop yield under the different drought stress levels (90,70,50,30) or under the interaction effect of drought stress and phytohormones or polyamines. According to the data of growth criteria, the maize genotype Nefertiti was found to be the most drought sensitive genotype, while the genotype Bashaier was found to be the most drought resistant genotype. Additionally while the photosynthetic pigments remained more or less unchanged in genotype Bashaier, their biosynthesis destroyed earlier in the drought sensitive genotype (Nefertiti). Also while the genotype Bashaier absorbed and accumulated a sufficient amount of mono and divalent cations (K+, Ca++ and mg++), the genotype Nefertiti did not. Accordingly while the genotype Bashaier gave a crop yield up to 50% field capacity, the genotype Nefertiti gave a crop yield only up to 70% field capacity and failed to give a crop yield beyond this level. The interaction effect of drought stress and phytohormones and polyamines improved the all above characteristics. Interestingly each of these activators considerably improved the production of crop yield only in genotype Bashaier specially polyamines they produced more than 60% field capacity and at the level of 30% field capacity (the level which did not give crop yield in this genotype). however, phytohormones in generally did not make an important effect on the crop yield in genotype Nefertiti although they improved the dry matter production during the vegetative stages. Such situation seemed to be complicated and borne many questions to be studied in the future.

关键词： Drought maize (Zea maize L.) Phytohormones Polyamines Leaf Area Dry weight Yield

Exploring the percentage of COVID-19 cases reported in the community in Canada and associated case fatality ratios

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Infectious Disease modelling 2021年第1期6卷 123-132页

作者： Brendan P.Dougherty Ben A.Smith Carolee A.Carson Nicholas h.Ogden Centre for Food-borne and Environmental Zoonotic Infectious Diseases Public Health Agency of Canada370 Speedvale Ave W.GuelphONN1H 7M7Canada Public health Risk Sciences Division National Microbiology LaboratoryPublic Health Agency of Canada370 Speedvale Ave W.GuelphONN1H 7M7Canada Public health Risk Sciences Division National Microbiology LaboratoryPublic Health Agency of CanadaSt.HyacintheQCJ2S 2M2Canada

while surveillance can identify changes in COVID-19 transmission patterns over time and space,sections of the population at risk,and the efficacy of public health measures,reported cases of COVID-19 are generally understood to only capture a subset of the actual number of *** primary objective was to estimate the percentage of cases reported in the general community,considered as those that occurred outside of long-term care facilities(LTCFs),in specific provinces and Canada as a *** applied a methodology using the delay-adjusted case fatality ratio(CFR)to all cases and deaths,as well as those representing the general *** second objective was to assess whether the assumed CFR(mean=1.38%)was appropriate for calculating underestimation of cases in *** were developed for the period from march 11th,2020 to September 16th,*** of the percentage of cases reported(PrCR)and CFR varied spatially and temporally across *** the majority of provinces,and for Canada as a whole,the PrCR increased through the early stages of the *** estimated PrCR in general community settings for all of Canada increased from 18.1%to 69.0%throughout the entire study *** were greater when considering only those data from outside of *** estimated upper bound CFR in general community settings for all of Canada decreased from 9.07%on march 11th,2020 to 2.00%on September 16th,***,the true CFR in the general community in Canada was likely less than 2%on September *** to our analysis,some provinces,such as Alberta,manitoba,Newfoundland and Labrador,Nova Scotia,and Saskatchewan reported a greater percentage of cases as of September 16th,compared to British Columbia,Ontario,and *** could be due to differences in testing rates and criteria,demographics,socioeconomic factors,race,and access to healthcare among the *** investigation into these factors could reveal differences among provinc

关键词： SARS-CoV-2 Underestimation Coronavirus disease Long term care facilities Case fatality ratio

磷铁钠矿型NaFePO_4/C正极的制备及储钠性能

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

硅酸盐通报 2018年第7期37卷 2191-2194页

作者：李栋栋侯宏英姚远廖启书代志鹏余成义昆明理工大学材料科学与工程学院昆明650093

通过溶胶凝胶法制备了磷铁钠矿型NaFePO_4/C钠离子电池正极材料,然后利用X射线衍射(XRD)、扫描电子显微镜(SEm)以及X射线能量色散光谱(EDX)研究了磷铁钠矿型NaFePO_4/C正极材料的微观结构及形貌;并进一步利用恒流充/放电及循环伏安(CV)... 详细信息

通过溶胶凝胶法制备了磷铁钠矿型NaFePO_4/C钠离子电池正极材料,然后利用X射线衍射(XRD)、扫描电子显微镜(SEm)以及X射线能量色散光谱(EDX)研究了磷铁钠矿型NaFePO_4/C正极材料的微观结构及形貌;并进一步利用恒流充/放电及循环伏安(CV)技术测试了其电化学性能。结果表明:所制备的磷铁钠矿型NaFePO_4/C正极在0.1 C时的首次放电比容量约为26.9 m Ah/g,经过50次循环后,电极的容量保持率为98.6%,而且在1.0 C时的可逆放电比容量仍为15.5 m Ah/g,表现了满意的充/放电循环稳定性和倍率性能,在对电池容量要求不高的应用场合中优势更加明显。

关键词：溶胶凝胶法磷铁钠矿结构 NaFePO4 正极材料钠离子电池

The Prevalence of human Papilloma Virus (hPV) among Egyptian women and Its Impact: An Observational Study

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

Open Journal of Obstetrics and Gynecology 2021年第7期11卷 879-884页

作者： m. Elazab O. Ali m. C. Ramadan m. hassan h. Aljedaani F. Gardner Al Galaa Teaching hospital Cairo Egypt North Cumbria University hospital North Cumbria UK New Cairo General hospital Cairo Egypt Ibn Sina College hospital for medical Science Jeddah KSA DFFP MRCOG Portsmouth Hospital Portsmouth UK

Cancer is one of the most prevalent causes of mortality worldwide. In the cervix, it is confirmed to be caused by different high-risk human papillomavirus (hPV) types. Although many studies have already been conducted worldwide on the epidemiology of hPV infection and their oncogenic properties, limited data are available on HPV prevalence, incidence andmily:Verdana;"> its impacts in Egypt.

关键词： hPV Screening Test Cancer Cervix

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

双奇核^(188)Au的准粒子带结构研究

高能物理与核物理 2006年第2期30卷 99-104页

作者：方永得张玉虎 m.Oshima Y.Toh 周小红 m.Koizumi A.Osa A.Kimura Y.hatsukawa T.morikawa m.Nakamura m.Sugawara h.Kusakari 中国科学院近代物理研究所 Japan Atomic Energy Research Institute TokaiIbaraki 319-1195Japan Department of Physics Kyushu UniversityFukuoka 812-81Japan Chiba Institute of Technology NarashinoChiba 275-0023Japan Chiba University Inage-kuChiba 263-8512Japan

利用在束γ谱学实验技术,通过173Yb(19F,4nγ)反应布居了188Au的高自旋态,并对其准粒子带结构进行了研究．基于实验测量结果,对原有的双奇核188Au能级纲图做了较大的修改．通过系统性比较,对15+以上的能级结构进行了讨论．

关键词：在束γ谱学双奇核^188Au 高自旋态 γ形变

应用Stat mod对开关电路传导共模电流的建模

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

电力电子技术 2001年第5期35卷 45-47,27页

作者： m.Kchikach 袁义生钱照明 m.h.Pong 浙江大学杭州310027 香港大学

开关电路的EmI噪声与电路的拓扑布线密切相关。由于对共模电流精确仿真的需要 ,采用基于局部元等效电路法 (partialelementequivalentcircuit,PEEC)的软件Statmod分析开关电路的共模电流 ,对电路的寄生参数进行抽取和计算。建立这一模... 详细信息

开关电路的EmI噪声与电路的拓扑布线密切相关。由于对共模电流精确仿真的需要 ,采用基于局部元等效电路法 (partialelementequivalentcircuit,PEEC)的软件Statmod分析开关电路的共模电流 ,对电路的寄生参数进行抽取和计算。建立这一模型的基础在于 ,共模电流主要和各个节点的分布电容有关 ,尤其是那些具有高di/dt和高dv/dt的电路节点。实验结果表明 ,所建立的共模电流模型在

关键词：电磁干扰开关电路 Statmod 开关电源建模

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

骨骼系统基本生物力学

骨骼系统基本生物力学

Seasonal variation of the ion upflow in the topside ionosphere during Subauroral Polarization Streams periods

作者： V.h.·弗兰克尔(V.h. Frankel) m.·诺尔丁(m. Nordin)

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

Seasonal variation of the ion upflow in the topside ionosphe...