检索结果-南通市图书馆

比色法测定N-乙酰葡糖胺和N-乙酰半乳糖胺

the 8th International Congress on Sle

作者： Alekberova Z Alexandrova e Kosheleva N Chusrnieva S Denisov l Nasonov e State Institute of Rheumatology of RAMS RussiaMoscou State Institute of Rheumatology of RAMS RussiaMoscou State Institute of Rheumatology of RAMS RussiaMoscou State Institute of Rheumatology of RAMS RussiaMoscou State Institute of Rheumatology of RAMS RussiaMoscou State Institute of Rheumatology of RAMS RussiaMoscou

＜正＞Antibodies to annexin-5（aAn5）are regarded as a risk factor of fetal loss in Systemic lupus erythematosus（Sle）. Aim:to determine the value of aAn5 in Sle pts in different trimesters of pregnancy. Material and methods:15 pts with Sle（ACR criteria, 1997）,median age 28.0（23-33）yrs,Sle duration 4.0（3-9）

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

食品与药品 2010年第9期12卷 374-378页

作者： Morgan W t j elson l A 陈祥娥

乙酰葡糖胺与对二甲氨基苯甲醛的反应最初由Müller发现,即当戊-乙酰葡糖胺溶液与稀氢氧化钾共热后,加入盐酸酸化的对二甲氨基苯甲醛溶液（ehrlich试剂）可产生强紫红色。

关键词：葡糖胺比色法测定乙酰对二甲氨基苯甲醛半乳糖甲醛溶液氢氧化钾盐酸酸化

environmentally relevant concentrations of aminopolycarboxylate chelating agents mobilize Cd from humic acid

在线全文

学校读者我要写书评

暂无评论

journal of environmental Sciences 2017年第7期29卷 249-257页

作者： Ashley e.North Sophia Sarpong-Kumankomah Andrew R.Bellavie Wade M.White jürgen Gailer Department of Chemistry and environmental Science Program University of Calgary2500 University Drive NWCalgaryAB T2N 1N4Canada

Although Cd is a pollutant of public health relevance,many dietary sources from which it can be absorbed into human tissues remain *** it is well established that the biogeochemical cycle of Cd involves its complexation with environment-derived ligands（e.g.,humic acids,HAs） and anthropogenic ones（e.g.,chelating agents,CAs）,the interaction of Cd with both of these ligands is less well *** gain insight,a HA–Cd complex was injected on a size-exclusion chromatography（SeC） column coupled on-line with a flame atomic absorption spectrometer（FAAS） using 10 mmol/l tris buffer（pH 8.0） as the mobile *** approach allowed us to observe the intact HA–Cd complex and the retention behavior of Cd as a function of 2–20 μmol/l concentrations of ethylenediaminetetraacetic acid（eDtA）,diethylenetriaminepentaacetic acid（DtPA） or methylglycinediacetic acid（MGDA） that were added to the mobile *** increase of the retention time of Cd was indicative of a partial or complete abstraction of Cd from *** results revealed that all CAs abstracted Cd from the HA–Cd complex at concentrations of 5 μmol/l,while MGDA and DtPA were effective at 2 μmol/*** bioavailability of some of the on-column formed CA–Cd complexes explains the previously reported increased accumulation of Cd in periphyton in the ecosystem downstream of wastewater treatment *** addition,our results imply that the use of effluents which contain CAs and Cd for the irrigation of food crops can introduce Cd into the food supply and compromise food safety.

关键词： Cadmium Humic acid Chelating agents eDtA DtPA MGDA Bioavailability

A diagnosis with a twist:Ultrasonographic sensitivity and predictors of pediatric ovarian torsion within a large pediatric hospital

在线全文

学校读者我要写书评

暂无评论

World journal of emergency Medicine 2022年第3期13卷 229-231页

作者： Mark K.Hewitt jesse e.Marshall-Sheppard April j.Kam Department of Medicine Division of Emergency MedicineMcMaster UniversityHamilton L8S 4L8Canada Department of Family Medicine University of TorontoToronto M5S1A1Canada Department of Pediatrics Division of Pediatric Emergency MedicineMcMaster UniversityHamilton 8S 4L8Canada

the diagnosis of ovarian torsion(Ot)in girls is challenging compared to that of testicular torsion in boys for many reasons,but it behooves the medical community to continue to strive to better identify this uncommon but clinically important pathology^([1]) Ot occurs when the ovary and associated structures rotate around its vascular pedicle,leading to eventually irreversible necrosis.^([2,3])Studies attempting to identify clinical features for early diagnosis have not reached a consensus on the best clinical predictors of this condition,making radiographic imaging of the ovaries even more crucial.^([4,5])

关键词： diagnosis pediatric torsion

Improving BRICS’s public health and wellness through physical activity

在线全文

学校读者我要写书评

暂无评论

journal of Sport and Health Science 2019年第6期8卷 503-504页

作者： Barbara e.Ainsworth Fuzhong li j.larry Durstine School of Kinesiology Shanghai University of SportShanghai 200438China College of Health Solutions Arizona State UniversityPhoenixAZ 85004USA Oregon Research Institute OR 97403USA Department of exercise Science The University of South CarolinaColumbiaSC 29208USA

In 2009,Professor Steven Blair predicted that physical inactivity would be the greatest public health issue of the 21st century.~1 A public health problem is one that affects the health,function,and well-being of a la... 详细信息

关键词： greatest function BRICS

Immediate and late effects of chronic stress in the testes of prepubertal and adult rats

在线全文

学校读者我要写书评

暂无评论

Asian journal of Andrology 2018年第4期20卷 385-390页

作者： Carina t Ribeiro Diogo B De Souza Waldemar S Costa Francisco j B Sampaio Marco A Pereira-Sampaio Urogenital Research Unit State University of Rio de Janeiro Rio de Janeiro RJ 20551-030 Brazil Department of Morphology Fluminense Federal University Niteroi RJ 24210-150 Brazil

the objective of this study was to investigate the effects of chronic stress on the testes of prepubertal and adult rats and to evaluate whether any alterations could be reversed when stress induction is ended. Seventy-six male rats were assigned to eight groups depending on the type of treatment （control or stressed）, the age at which stress was initiated （prepubertal or adult）, and the time of evaluation （immediate or late）. Stress stimuli were applied for 6 weeks. Stressed prepubertal and adult rats evaluated immediately after the last stress stimulus were included in SP-I and SA-I groups, respectively. the late prepubertal （SP-l） and adult （SA-l） groups of stressed rats were evaluated 6 weeks after the last stress stimulus. Age-matched rats were used as controls （CP-I, CA-I, CP-l, and CA-l groups）. Application of stress stimuli to rats in the SP-I group resulted in body weight and seminiferous tubule diameter reduction. the rats in the SA-I group also showed several functional （testosterone level and sperm parameter） and morphological （testicular weight and seminiferous tubule diameter） reductions. the rats in the SP-l group showed increased body weight and intertubular compartment volumetric and absolute densities and reduced tubular compartment volumetric density. the rats in the SA-l group presented only reduced sperm viability. Stress stimuli promoted changes in the rats in all the study groups. the testes of the adult rats were the most affected by chronic stress. However, the stressed adult rats recovered well from the testicular alterations.

关键词： chronic stress morphometry rat testis

Cenozoic plants from tibet:An extraordinary decade of discovery,understanding and implications

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

Science China earth Sciences 2023年第2期66卷 205-226页

作者： Zhekun ZHOU jia lIU linlin CHeN Robert A.SPICeR Shufeng lI jian HUANG Shitao ZHANG Yongjiang HUANG linbo jIA jinjin HU tao SU CAS Key laboratory of tropical Forest ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla666303China CAS Key laboratory for Plant Diversity and Biogeography of east Asia Kunming Institute of BotanyChinese Academy of SciencesKunming650204China School of environment Earth and Ecosystem SciencesThe Open UniversityMilton KeynesMK76AAUK Faculty of land Resource engineering Kunming University of Science and TechnologyKunming650093China State Key laboratory of Paleobiology and Stratigraphy Nanjing Institute of Geology and PaleontologyChinese Academy of SciencesNanjing210008China

Plant fossils play an important role in understanding landscape evolution across the tibetan Region,as well as plant diversity across wider eastern *** the last decade or so,paleobotanical investigations within the tibet Region have led to a paradigm shift in our understanding of how the present plateau formed and how this affected the regional climate and *** is because:(1)Numerous new taxa have been *** all the Cenozoic records of new plant fossil species reported from the tibet(Xizang)Autonomous Region 45 out of 63(70%)were documented after *** these,many represent the earliest records from Asia,or in some cases worldwide,at the genus or family level.(2)these fossils show that during the Paleogene,the region now occupied by the tibetan Plateau was a globally significant floristic exchange *** on paleobiogeographic studies,grounded by fossil evidence,there are four models of regional floristic migration and exchange,i.e.,into tibet,out of tibet,out of India and into/out of Africa.(3)Plant fossils evidence the asynchronous formation histories for different parts of the tibetan *** most of the Paleogene,there was a wide east-west trending valley with a subtropical climate in central tibet bounded by high(>4 km)mountain systems,but that by the early Oligocene the modern high plateau had begun to form by the rise of the valley *** reconstructions using radiometrically-dated plant fossil assemblages in southeastern tibet show that by the earliest Oligocene southeastern tibet(including the Hengduan Mountains)had reached its present elevation.(4)the coevolution between vegetation,landform and paleoenvironment is evidenced by fossil records from what is now the central tibetan *** the Paleocene to Pliocene,plant diversity transformed from that of tropical,to subtropical forests,through warm to cool temperate woodland and eventually to deciduous shrubland in response to landscape evolution from a seas

关键词： tibetan Plateau Cenozoic Paleobotany Flora Central valley Biodiversity

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

棉纤维真实成熟度的研究

中国纤检 1983年第3期 34-37页

作者： G·A·t·j·Rass l.Verschraege

成熟度是棉纤维的一种重要特性,它与纤维胞壁的扩展程度有关。成熟度的测量有多种方法,但是所有这些方法的标定都是从测量膨胀纤维着手的,如AStM或BS方法(即美国标准与英国标准)。本文提供的研究结果,其成熟度是由直接测量非膨胀纤维的... 详细信息

成熟度是棉纤维的一种重要特性,它与纤维胞壁的扩展程度有关。成熟度的测量有多种方法,但是所有这些方法的标定都是从测量膨胀纤维着手的,如AStM或BS方法(即美国标准与英国标准)。本文提供的研究结果,其成熟度是由直接测量非膨胀纤维的横截面而得。把用此法获得的结果与用膨胀法测得的结果作了对比,而且还与由二种间接的仪器方法所测得成熟度进行对比;二种仪器是爱洛米特(Arealometer)与IIC-锡莱细度/成熟度测试仪(FMt)(IIC-Shirley Fineness/Maturitg tester)。二种仪器都使用双效压缩气流技术。得到的结论是膨胀纤维的显微镜测量值不一定能充分反映棉纤维的成熟度,且无论如何二种仪器方法当更可信。本文给定从二种气流仪的读数估算棉纤维真正成熟度的一些近似转换方程。

关键词：成熟度显微镜细度纤维性能实验设备纤维气流仪

进化频率表征对统计推理(非)灵活性的影响:认知风格和简要提示不影响贝叶斯推理(英文)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

心理学报 2007年第3期39卷 398-405页

作者： Gary l. Brase University of Missouri-Columbia

当形式操纵有助于贝叶斯推理时会有怎样的加工发生呢?一种观点认为自然取样的频率可以激发在其操作中具有相对特异性的特权表征系统。而与之相对的一种观点则认为,自然取样频率只是引发具有嵌套关系的更为普遍的加工的一种方式。比较两... 详细信息

当形式操纵有助于贝叶斯推理时会有怎样的加工发生呢?一种观点认为自然取样的频率可以激发在其操作中具有相对特异性的特权表征系统。而与之相对的一种观点则认为,自然取样频率只是引发具有嵌套关系的更为普遍的加工的一种方式。比较两种观点,后者预示着只需要使用相当简要和直接的干预(如简单的指示)就能够促进推理的改善,而前者则意味着更为广泛的干预和/或更有洞见的理解才能改善推理。本研究表明,无论是短暂立即的干预,还是预存的表征偏向,抑或是表征的灵活性都不能促进被试的表现。另一方面,也有证据显示,频率论者的问题解释可以改善统计推理表现,而且有时还会增加其反应的信心。这些结果支持了特权表征系统观。

关键词：不确定性判断统计概率频率推测推理