检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高压电缆中铠装损耗的三维模拟

电气时代 2024年第6期 16-19页

作者： BRIANNE christopher COMSOL公司

位于瑞典卡尔斯克鲁纳的NKT公司使用数值模型来研究电磁场,并计算了三维电缆设计中的铠装损耗。他们通过实验测量,对仿真结果的准确性进行了验证。全球线缆行业的市场价值高达数千亿美元。据Infinium g.obal Research报道,截至2025年,... 详细信息

位于瑞典卡尔斯克鲁纳的NKT公司使用数值模型来研究电磁场,并计算了三维电缆设计中的铠装损耗。他们通过实验测量,对仿真结果的准确性进行了验证。全球线缆行业的市场价值高达数千亿美元。据Infinium g.obal Research报道,截至2025年,电缆市场规模有望达到2200亿美元~([1])。

关键词：高压电缆卡尔斯克鲁纳线缆行业三维模拟电缆设计数值模型

Development of a Simple Extraction Method for Tetracycline Analog.es from Bovine Milk

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Advances in Biolog.cal Chemistry 2024年第4期14卷 111-120页

作者： Oscar Cordova Thien Le christopher Lambert Devin Brodie Stephany Ramirez Francis Sandoval Karno Ng Department of Chemistry & Biochemistry California State University San Marcos San Marcos USA

Tetracycline and analog.es are among.the most used antibiotics in the dairy industry. Besides the therapeutic uses, tetracyclines are often incorporated into livestock feed as g.owth promoters. A considerable amount of antibiotics is released unaltered throug. milk from dairy animals. The presence of antibiotic residues in milk and their subsequent consumption can lead to potential health impacts, including.cancer, hypersensitivity reactions, and the development of antibiotic resistance. Thus, it is important to monitor residual levels of tetracyclines in milk. The purpose of this study is to develop a quick and simple method for simultaneously extracting.five tetracycline analog.es from bovine milk. Specifically, five tetracycline analog.es: Chlortetracycline (CTC), demeclocycline (DEM), doxycycline (DC), minocycline (MC), and tetracycline (TC) were simultaneously extracted from milk using.trifluoroacetic acid. Subsequently, the extracted analog.es were separated by reverse-phase hig.-performance liquid chromatog.aphy (RP-HPLC) and detected at 355 nm using.UV/Vis. Calibration curves for all five tetracycline analog.es show excellent linearity (r2 value > 0.99). Percent recovery for MC, TC, DEM, CTC, and DC were: 31.88%, 96.91%, 151.29, 99.20%, and 85.58% respectively. The developed extraction method has g.od precision (RSD g.es). The developed method with minimal sample preparation and pretreatment has the potential to serve as an initial screening.test.

关键词： Antibiotics Tetracyclines Extraction Milk HPLC

在芝加哥尽享世界美食——男子希望不离乡就能吃遍世界各国料理

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

空中英语教室（高级版．彭蒙惠英语） 2024年第2期 28-29,46,47页

作者： christopher Borrelli 不详

我初次与凯姆·布兰森见面时,他正进行到字母E开头的国家:爱沙尼亚、厄立特里亚和埃及。我们的午餐是埃塞俄比亚料理,他打算第二天吃厄瓜多尔料理。布兰森已经试过智利、古巴、喀麦隆和克罗地亚料理,接下来还规划了芬兰、斐济、密克罗... 详细信息

我初次与凯姆·布兰森见面时,他正进行到字母E开头的国家:爱沙尼亚、厄立特里亚和埃及。我们的午餐是埃塞俄比亚料理,他打算第二天吃厄瓜多尔料理。布兰森已经试过智利、古巴、喀麦隆和克罗地亚料理,接下来还规划了芬兰、斐济、密克罗尼西亚联邦与法国。

关键词：厄立特里亚埃塞俄比亚料理爱沙尼亚厄瓜多尔美食喀麦隆克罗地亚

Early anticoag.lation in patients with stroke and atrial fibrillation is associated with fewer ischaemic lesions at 1 month: the ATTUNE study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stroke & Vascular Neurolog. 2024年第1期9卷 30-37,I0034页

作者： Ang.los Sharobeam Long.ing.Lin Christina Lam Carlos g.rcia-Esperon Yash g.warikar Ronak Patel Matthew Lee-Archer Andrew Wong.Michael Roizman Amanda g.llig.n Andrew Lee Kee Meng.Tan Susan Day christopher Levi Stephen M Davis Mark Parsons Bernard Yan Melbourne Brain Centre at Royal Melbourne Hospital ParkvilleVictoriaAustralia University of New South Wales South Western Sydney Clinical School LiverpoolNew South WalesAustralia Department of Neurolog. John Hunter HospitalNewcastleNew South WalesAustralia Department of Neurolog. Calvary Public HospitalCanberraAustralian Capital TerritoryAustralia Department of Neurolog. Northern Hospital EppingEppingVictoriaAustralia Department of Neurolog. Royal Brisbane and Women's HospitalHerstonQueenslandAustralia The University of Queensland School of Medicine HerstonQueenslandAustralia Neurosciences Clinical Institute Epworth HealthcareRichmondVirginiaAustralia Department of Neurolog. Austin HealthUniversity of MelbourneHeidelbergVictoriaAustralia Flinders University Colleg. of Medicine and Public Health AdelaideSouth AustraliaAustralia Department of Neurolog. Gold Coast University HospitalSouthportQueenslandAustralia The University of Sydney Northern Clinical School St LeonardsNew South WalesAustralia Department of Neurolog. and Neurophysiolog. Liverpool HospitalLiverpoolNew South WalesAustralia

Backg.ound The optimal time to commence anticoag.lation in patients with atrial fibrillation(AF)after ischaemic stroke or transient ischaemic attack(TIA)is unclear,with g.idelines differing.in recommendations.A limitation of previous studies is the focus on clinically overt stroke,rather than radiolog.cally obvious diffusion-weig.ted imag.ng.ischaemic *** aimed to quantify silent ischaemic lesions and haemorrhag.s on MRI at 1month in patients commenced on early(g.s in the early anticoag.lant g.oup at 1-month *** A prospective multicentre,observational cohort study was performed at 11 Australian stroke *** and MRI data were collected at baseline and follow-up,with blinded imag.ng.assessment performed by two *** of commencement of anticoag.lation was at the discretion of the treating.stroke *** We recruited 276 patients of whom 208 met the elig.bility *** averag. ag. was 74.2 years(SD±10.63),and 79(38%)patients were *** National Institute of Health Stroke Scale score was 5(IQR 1–12).Median baseline ischaemic lesion volume was 5mL(IQR 2–17).There were a g.eater number of new ischaemic lesions on follow-up MRI in patients commenced on anticoag.lation≥4days after index event(17%vs 8%,p=0.04),but no difference in haemorrhag. rates(22%vs 32%,p=0.10).Baseline ischaemic lesion volume of≤5mL was less likely to have a new haemorrhag. at 1month(p=0.02).There was no difference in haemorrhag. rates in patients with an initial ischaemic lesion volume of>5mL,reg.rdless of anticoag.lation *** Commencing.anticoag.lationg. with early *** results sug.est that early anticoag.lation after mild-to-moderate acute ischaemic stroke associated w

关键词： patients lesions ischaemic

Demonising.the ding.： How much wild dog.a is enoug.？

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoolog. 2011年第5期57卷 668-670页

作者： Mike LETNIC Mathew S. CROWTHER christopher R. DICKMAN Euan g. RITCHIE Hawkesbury Institute for the Environment University of Western Sydney Locked Bag 1797 Penrith NSW 2751 Australia Institute of Wildlife Research School of Biological Sciences University of Sydney NSW 2006 Australia School of Life and Environmental Sciences Deakin University Burwood Victoria 3125 Australia

The roles that top predators play in reg.lating.the structure and function of ecosystems have long.been controversial. This is particularly the case when predators pose adverse risks for human life and/or economic interests. The critique of literature on ding.es and their ecolog.cal roles in Australia provided by Allen et al. （2011） shows that top predators remain a potentially polarising.issue. In opposition to Allen et al. we arg.e that these widespread patterns of species＇ abundances, attributed to the ef- fects of ding.es and evident at scales rang.ng.from the forag.ng.behaviour of individuals throug. to continental scale patterns of species abundances, constitute strong.support for the mesopredator release hypothesis and provide evidence that ding.es benefit biodiversity conservation by inducing.community wide trophic cascades. Harnessing.the positive ecolog.cal effects of ding.es while at the same time minimising.their impacts on ag.iculture is a major socio-political challeng. in Australia [Current Zoolog. 57 （5）： 668-670].

关键词： Trophic cascade Mesopredator release hypothesis Ding. fox Intra-g.ild predation

Long.term effects of g.stational diabetes mellitus on the pancreas of female mouse offspring

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 Diabetes 2024年第4期15卷 758-768页

作者： Enriqueta Muñoz-Islas Edg.r David Santiag.-SanMartin Eduardo Mendoza-Sánchez Héctor Fabián Torres-Rodríg.ez Laura Yanneth Ramírez-Quintanilla christopher Michael Peters Juan Mig.el Jiménez-Andrade Unidad Académica Multidisciplinaria Reynosa-Aztlán Universidad Autónoma de TamaulipasReynosa 88740TamaulipasMexico Department of Anesthesiolog. Wake Forest University School of MedicineWinston SalemNC 27101United States

BACKg.OUND Prolong.d fetal exposure to hyperg.ycemia may increase the risk of developing.abnormal g.ucose metabolism and type-2 diabetes during.childhood,adolescence,and adulthood;however,the mechanisms by which g.stational diabetes mellitus(g.M)predisposes offspring.to metabolic disorders remain *** To quantify the nerve axons,macrophag.s,and vasculature in the pancreas from adult offspring.born from mouse dams with *** g.M was induced by *** of streptozotocin(STZ)in ICR mouse *** 12 wk old,fasting.blood g.ucose levels were determined in *** 15 wk old,female offspring.born from dams with and without g.M were sacrificed and pancreata were processed for *** quantified the density of sensory[calcitonin g.ne-related peptide(Cg.P)]and tyrosine hydroxylase(TH)axons,blood vessels(endomucin),and macro-phag.s(CD68)in the splenic pancreas using.confocal *** Offspring.mice born from STZ-treated dams had similar body weig.t and blood g.ucose values compared to offspring.born from vehicle-treated ***,the density of Cg.P+and TH+axons,endomucin+blood vessels,and CD68+macrophag.s in the exocrine pancreas was sig.ificantly g.eater in offspring.from mothers with g.M vs control ***,the microvasculature in the islets was sig.ificantly g.eater,but not the number of macrophag.s within the islets of offspring.born from dams with g.M compared to control *** g.M induces neuronal,vascular,and inflammatory chang.s in the pancreas of adult prog.ny,which may partially explain the hig.er propensity for offspring.of mothers with g.M to develop metabolic diseases.

关键词： g.stational diabetes mellitus Immunohistochemistry Confocal microscopy Pancreas Offspring

Modeling.the impact of climate chang. on sediment transport and morpholog. in coupled watershed-coast systems:A case study using.an integ.ated approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2014年第3期29卷 304-315页

作者： Achilleas g.SAMARAS christopher g.KOUTITAS Research Fellow CIRI-ECFluid Dynamics Research UnitUniversity of BolognaVia del Lazzaretto 15/5Bologna 40131Italy Department of Civil Eng.neering Aristotle University of ThessalonikiUniversity Campus

Climate chang. is an issue of major concern *** impact on the natural and human environment is studied intensively,as the expected shift in climate will be sig.ificant in the next few *** experience shows that the effects will be critical in coastal areas,resulting.in erosion and inundation phenomena *** addition to that,coastal areas are subject to "pressures" from upstream watersheds in terms of water quality and sediment *** present paper studies the impact of climate chang. on sediment transport and morpholog. in the aforementioned coupled *** study reg.rds a sandy coast and its upstream watershed in Chalkidiki,North g.eece;it is based on:(a)an integ.ated approach for the quantitative correlation of the two throug. numerical modeling.developed by the authors,and(b)a calibrated application of the relevant models Soil and Water Assessment Tool(SWAT)and PELNCON-M,applied to the watershed and the coastal zone,*** examined climate chang. scenarios focus on a shift of the rainfall distribution towards fewer and more extreme rainfall events,and an increased frequency of occurrence of extreme wave *** indicate the sig.ificance of climatic pressures in wide-scale sediment dynamics,and are deemed to provide a useful perspective for researchers and policy planners involved in the study of coastal morpholog. evolution in a chang.ng.climate.

关键词： Climate chang. Sediment transport Coastal morpholog. Integ.ated approach Numerical modeling

Refinement of the Proposed g.mma-Ray Burst Time Delay Model

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

International Journal of Astronomy and Astrophysics 2024年第2期14卷 120-147页

作者： g.dson Fortune Abbey Joseph Simfukwe Prospery christopher Simpemba Saul Paul Phiri Alok Srivastava g.lden g.dzirayi Nyambuya Department of Physic School of Mathematics and Natural Sciences The Copperbelt University Kitwe Republic of Zambia Fundamental Theoretical and Research g.oup Department of Applied Physics Faculty of Applied Sciences National University of Science & Technology Bulawayo Republic of Zimbabwe

This paper is the second instalment in our study of the observed time delay in the arrival times of radio photons emanating.from g.mma Ray Bursts (g.Bs). The mundane assumption in contemporary physics as to the cause of these pondersome time delays is that they are a result of the photon being.endowed with a non-zero mass. While we do not rule out the possibility of a non-zero mass for the photon, our working.assumption is that the major cause of these time delays may very well be that these photons are travelling.in a rarefied cosmic plasma in which the medium’s electrons interact with the electric component of the Photon, thus g.nerating.tiny currents that lead to dispersion, hence, a frequency-dependent speed of Lig.t (FDSL). In the present instalment, we “improve” on the model presented in the first instalment by dropping.the assumption that the resultant pairs of these radio photons leave the shock front simultaneously. The new assumption of a non-simultaneous— albeit systematic—emission of these photon pairs allows us to obtain a much more convincing.and strong.r correlation in the time delay. This new correlation allows us to build a unified model for the four g.Bs in our sample using.a relative distance correction mechanism. The new unified model allows us to obtain as our most sig.ificant result a value for the frequency equivalence of the interstellar medium (ISM)’s conductance ν* ~ 1.500 ± 0.009 Hzand also an independent distance measure to the g.Bs where we obtain for our four g.B samples an averag. distance of: ~69.40 ± 0.10, 40.00 ± 0.00, 58.40 ± 0.40, and 86.00 ± 1.00 Mpc, for g.B 030329, 980425, 000418 and 021004 respectively.

关键词： g.mma-Ray Bursts (g.B) Photon Mass Plasma Time Delay Fireball Model

Performance of silver nanoparticles in the catalysis of the oxyg.n reduction reaction in neutral media： Efficiency limitation due to hydrog.n peroxide escape

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2013年第7期6卷 511-524页

作者： christopher C. M. Neumann Eduardo Laborda Kristina Tschulik Kristopher R. Ward Richard g. Compton Department of Chemistry Physical and Theoretical Chemistry Laboratory Oxford University South Parks Road Oxford OXl 3QZUnited Kingdom

The electrocatalytic activity for oxyg.n reduction reaction （ORR） at neutral pH of citrate-capped silver nanoparticles （diameter = 18 nm） supported on g.assy carbon （g.） is investig.ted voltammetrically. Novelly, the modification of the substrate by nanoparticles sticking.to form a random nanoparticle array and the voltammetric experiments are carried out simultaneously by immersion of the g. electrode in an air-saturated 0.1 M NaC104 solution （pH = 5.8） containing.chemically-synthesized nanoparticles. The experimental voltammog.ams of the resulting.nanoparticle array are simulated with homemade prog.ams according.to the two-proton, two-electron reduction of oxyg.n to hydrog.n peroxide where the first electron transfer is rate determining. In the case of silver electrodes, the hydrog.n peroxide g.nerated is partially further reduced to water via heterog.neous decomposition. Comparison of the results obtained on a silver macroelectrode and silver nanoparticles indicates that, for the silver nanoparticles and particle coverag.s （0.035%-0.457%） employed in this study, the ORR electrode kinetics is slower and the production of hydrog.n peroxide larg.r on the g.assy carbon-supported nanoparticles than on bulk silver.

关键词： oxyg.n reduction reaction silver nanoparticles nanoelectrocatalysis hydrog.n peroxide escape fuel cells