检索结果-南通市图书馆

China Standardization 2010年第3期55卷 26-33页

作者： ian Lumley Selvarani Elahi michael Walker Head of Food Science Laboratory of the Government Chemist(LGC) Head of Food Chemistry LGC Consultant Science & Food Law Manager LGC

它是明显的那食物并且喂应该安全、卫生以便保护消费者并且保证动物健康和福利。动物健康和福利是贡献食物质量的维护的重要因素， *** 股东要求一条基于风险、相称、综合、透明的途径到“到越过所有 EU 成员状态并且在主要世界做贸易... 详细信息

它是明显的那食物并且喂应该安全、卫生以便保护消费者并且保证动物健康和福利。动物健康和福利是贡献食物质量的维护的重要因素， *** 股东要求一条基于风险、相称、综合、透明的途径到“到越过所有 EU 成员状态并且在主要世界做贸易之间的 fork'official 控制的农场合伙。另外，消费者和工业要求到食物法律实现和实施的一致 EU 和全球途径食物安全和做贸易的条件 *** 监视器依从与地阻止差别喂，食物法律样品不得不被实验室处于 EU 成员州并且在另外的国家分析出口进 EU。许多分析方法申请了如此的正式控制是复杂的。这是特别地，为方法的盒子为察觉使用了同意并且未经同意的添加剂，兽医并且杀虫剂残余和过程 *** 做我们保证在实验室之间并且在国家之间的分析大小的一致性和相似性吗？我们怎么预言并且期望我们可以不得不下星期从食物链在样品检测并且决定的目标 analytes，下个月并且明年？作为后果，怎么我们准备将能够探讨这些挑战的分析方法并且怎么我们证明他们是柔韧的，验证并且提供将承受挑战的数据 ? 这些是被实验室在所有做贸易的国家面对的问题。这篇文章将考察这些问题，描述试图期望可以在使实验室能经由测试计划的确认协议，参考材料和熟练的使用表明他们分析的方法的可靠性的未来和评论途径影响食物链的问题的一个工程。

关键词：食品安全法规欧洲

Natural killer T cells and non-alcoholic fatty liver disease:Fat chews on the immune system

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

World Journal of Gastroenterology 2008年第3期14卷 487-488页

作者： michael Kremer ian N Hines Department of Surgery University of Heidelberg Heidelberg 69120 Germany Department of Medicine University of North Carolina at Chapel Hill CB 7525 United States

Natural killer T cells (NKT) are an important subset of T lymphocytes. They are unique in their ability to produce both T helper 1 and T helper 2 associated cytokines, thus being capable of steering the immune system into either inflammation or tolerance. Disruption of NKT cell numbers or function results in severe deficits in immune surveillance against pathogens and tumor cells. Growing experimental evidence suggests that hepatosteatosis may reduce resident hepatic as well as peripheral NKT cells. Those models of hepatosteatosis and the change in NKT cell numbers are associated with a disruption of cytokine homeostasis, resulting in a more pronounced release of proinflammatory cytokines which renders the steatotic liver highly susceptible to secondary insults. In this letter to the editor, we focus on recently published data in the World Journal of Gastroenterology by Xu and colleagues demonstrating reduced peripheral NKT cells in patients with non-alcoholic fatty liver disease, compare those findings with ours and others in different animal models of hepatosteatosis, and hypothesize about the potential underlying mechanism.

关键词：肥胖症代谢综合症白介素症状

The commutant and similarity invariant of analytic Toeplitz operators on Bergman space

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 Mathematics 2007年第5期50卷 651-664页

作者： Chun-ian JianG Yu-cheng Li Department of Mathematics Hebei Normal UniversityShijiazhuang 050016China

The famous von Neumann-Wold Theorem tells us that each analytic Toeplitz operator with n + 1-Blaschke factors is unitary to n + 1 copies of the unilateral shift on the Hardy space. It is obvious that the von Neumann-Wold Theorem does not hold in the Bergman space. In this paper, using the basis constructed by michael and Zhu on the Bergman space we prove that each analytic Toeplitz operator Mb(z) is similar to n + 1 copies of the Bergman shift if and only if B(z) is an n + 1-Blaschke product. Prom the above theorem, we characterize the similarity invariant of some analytic Toeplitz operators by using K0-group term.

关键词： Bergman space analytic Toeplitz operators invariant subspace commutant similarity invariant K0-group

Long-distance ABA transport can mediate distal tissue responses by affecting local ABA concentrations

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

Journal of Integrative Plant Biology 2018年第1期60卷 16-33页

作者： Wenrao Li Carlos de Ollas ian C Dodd College of Life Sciences Henan University Kaifeng 475004 China Plant & Crop Sciences Lancaster Environment Center Lancaster University Lancaster LAI 4YQ United Kingdom

Environmental stresses that perturb plant Hwater relations influence abscisic acid(ABA) concentrations, but it is unclear whether long-distance ABA transport contributes to changes in local ABA levels. To determine the physiological relevance of ABA transport, we made reciprocal-and self-grafts of ABA-deficient flacca mutant and wild-type(WT) tomato plants, in which low phosphorus(P) conditions decreased ABA concentrations while salinity increased ABA concentrations. Whereas foliar ABA concentrations in the WT scions were rootstock independent under control conditions, salinity resulted in long-distance transport of ABA: flacca scions had approximately twice as much ABA when grafted on WT rootstocks compared to flacca rootstocks. Root ABA concentrations were scion dependent: both WT and flacca rootstocks had less ABA with the flacca mutant scion than with the WT scion under control conditions. In WT scions, whereas rootstock genotype had limited effects on stomatal conductance under control conditions, a flacca rootstock decreased leaf area of stressed plants, presumably due to attenuated root-to-shoot ABA transport. In flacca scions, a WT rootstock decreased stomatal conductance but increased leaf area of stressed plants, likely due to enhanced root-to-shoot ABA transport. Thus, long-distance ABA transport can affect responses in distal tissues by changing local ABA concentrations.

关键词： ABA Long-distance ABA transport can mediate distal tissue responses by affecting local ABA concentrations Figure

Robotic pendant drop:containerless liquid for μs-resolved,AI-executable XPCS

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

Light(Science & Applications) 2023年第9期12卷 1857-1866页

作者： Doga Yamac Ozgulbas Don Jensen Jr. Rory Butler Rafael Vescovi ian T.Foster michael Irvin Yasukazu Nakaye Miaoqi Chu Eric M.Dufresne Soenke Seifert Gyorgy Babnigg Arvind Ramanathan Qingteng Zhang Data Science and Learning Division Argonne National LaboratoryLemontIL 60439USA X-ray Science Division Argonne National LaboratoryLemontIL 60439USA Departement of Computer Science University of Chicago5801 S Ellis AveChicagoIL 60637USA XRD Design and Engineering Department Rigaku Corporation 3-9-12 Matsubara-choAkishima-shiTokyo 196-8666Japan Bioscience Division Argonne National LaboratoryLemontIL 60439USA

The dynamics and structure of mixed phases in a complex fluid can significantly impact its material properties,such as ***-angle X-ray Photon Correlation Spectroscopy(SA-XPCS)can probe the spontaneous spatial fluctuations of the mixed phases under various in situ environments over wide spatiotemporal ranges(10−6–103 s/10−10–10−6 m).Tailored material design,however,requires searching through a massive number of sample compositions and experimental parameters,which is beyond the bandwidth of the current coherent X-ray *** 3.7-μs-resolved XPCS synchronized with the clock frequency at the Advanced Photon Source,we demonstrated the consistency between the Brownian dynamics of~100 nm diameter colloidal silica nanoparticles measured from an enclosed pendant drop and a sealed *** electronic pipette can also be mounted on a robotic arm to access different stock solutions and create complex fluids with highly-repeatable and precisely controlled composition *** closed-loop,AI-executable protocol is applicable to light scattering techniques regardless of the light wavelength and optical coherence,and is a first step towards high-throughput,autonomous material discovery.

关键词： resolved sealed mounted

An Analysis of Heat Explosion for Thermally Insulated and Conducting Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics 2012年第6期3卷 535-540页

作者： Irina Viktorova michael Scruggs ian Zeller Kyle Fairchild Department of Materials Science and Engineering Clemson University Clemson USA Department of Mathematical Sciences Clemson University Clemson USA Department of Mechanical Engineering Clemson University Clemson USA

In the scope of material science, it is well understood that mechanical behavior of a material is temperature dependent. The converse is also true and for specific loading cases contributes to a unique thermal failure mechanism known as “heat explosion”. The goal for this paper is to improve the mathematical models for predicting heat explosion by using a specific case of the Fourier heat transfer system that focuses on thermoviscoelastic properties of materials. This is done by using a computational analysis to solve for an internal heat parameter that determines thermal failure at a critical value. This critical value is calculated under conditions either accounting for or negating the effect of heat dissipated by the material. This model is an improvement on existing models because it accounts for material specific properties and in doing so limits mathematical assumptions of the system. By limiting the assumptions in the conditions of the model, the model becomes more accurate and useful in regards to material design.

关键词： Computational Analysis Conducting System Heat Explosion Heating Parameters Insulated System Self-Heating Thermal Failure

On-chain analytics for sentiment-driven statistical causality in cryptocurrencies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Blockchain(Research and Applications) 2022年第2期3卷 39-63页

作者： Ioannis Chalkiadakis Anna Zaremba Gareth W.Peters michael J.Chantler School of Mathematical and Computer Sciences Heriot-Watt UniversityScotlandEH144ASUK Department of Computer Science University CollegeLondonWC1E 7HUUK Janet and ian Duncan Endowed Chair of Actuarial Science Department of Statistics and Applied ProbabilityUniversity of CaliforniaSanta BarbaraCA93106USA

This paper establishes a new framework for assessing multimodal statistical causality between cryptocurrency market(cryptomarket)sentiment and cryptocurrency price *** order to achieve this,we present an efficient algorithm for multimodal statistical causality analysis based on Multiple-Output Gaussian *** from different information sources(modalities)are jointly modelled as a Multiple-Output Gaussian Process,and then using a novel approach to statistical causality based on Gaussian Processes(GPs),we study linear and non-linear causal effects between the different *** demonstrate the effectiveness of our approach in a machine learning application by studying the relationship between cryptocurrency spot price dynamics and sentiment time-series data specific to the crypto sector,which we conjecture influences retail investor *** investor sentiment is extracted from cryptomarket news data via methods developed in the area of statistical machine learning known as Natural Language Processing(NLP).To capture sentiment,we present a novel framework for text to time-series embedding,which we then use to construct a sentiment index from publicly available news *** conduct a statistical analysis of our sentiment statistical index model and compare it to alternative state-of-the-art sentiment models popular in the NLP *** regard to the multimodal causality,the investor sentiment is our primary modality of exploration,in addition to price and a blockchain technologyrelated indicator(hash rate).Analysis shows that our approach is effective in modelling causal structures of variable degree of complexity between heterogeneous data sources and illustrates the impact that certain modelling choices for the different modalities can have on detecting causality.A solid understanding of these factors is necessary to gauge cryptocurrency adoption by retail investors and provide sentiment-and technologybased insights about the cry

关键词： Cryptocurrencies Statistical causality Blockchain regression Multiple-output Gaussian process Natural language processing Cryptonews sentiment

The Effect of Transition Hysteresis Width in Thermochromic Glazing Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Energy Efficiency 2013年第2期2卷 75-88页

作者： michael E. A. Warwick ian Ridley Russell Binions Department of Chemistry University College London Christopher Ingold Laboratories London UK School of Engineering and Materials Science Queen Mary University of London London UK School of Property Construction and Project Management RMIT University Melbourne Australia

Thermochromic glazing theoretically has the potential to lead to a large reduction in energy demand in modern buildings by allowing the transmission of visible light for day lighting whilst reducing unwanted solar gain during the cooling season, but allowing useful solar gain in the heating season. In this study building simulation is used to examine the effect of the thermochromic transition hysteresis width on the energy demand characteristics of a model system in a variety of climates. The results are also compared against current industry standard glazing products. The results suggest that in a warm climate with a low transition temperature and hysteresis width energy demand can be reduced by up to 54% compared to standard double glazing.

关键词： Energy Simulation Energy Demand Reduction Thermochromic Glazing

Stem cell therapy for heart failure:Medical breakthrough,or dead end?

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 Stem Cells 2021年第4期13卷 236-259页

作者： Mathieu Rheault-Henry ian White Diya Grover Rony Atoui Northern Ontario School of Medicine Sudbury P3E 2C6OntarioCanada Ross University School of Medicine St.Michael BB11093Barbados Division of Cardiac Surgery Health Sciences NorthNorthern Ontario School of MedicineSudbury P3E 3Y9OntarioCanada

Heart failure continues to be one of the leading causes of morbidity and mortality *** infarction is the primary causative agent of chronic heart failure resulting in cardiomyocyte necrosis and the subsequent formation of fibrotic scar *** pharmacological and non-pharmacological therapies focus on managing symptoms of heart failure yet remain unable to reverse the underlying *** transplantation usually cannot be relied on,as there is a major discrepancy between the availability of donors and *** a result,heart failure carries a poor prognosis and high mortality *** the heart lacks significant endogenous regeneration potential,novel therapeutic approaches have incorporated the use of stem cells as a vehicle to treat heart failure as they possess the ability to self-renew and differentiate into multiple cell lineages and *** review will discuss past,present,and future clinical trials,factors that influence stem cell therapy outcomes as well as ethical and safety *** and clinical studies have shown a wide spectrum of outcomes when applying stem cells to improve cardiac *** may reflect the infancy of clinical trials and the limited knowledge on the optimal cell type,dosing,route of administration,patient parameters and other important variables that contribute to successful stem cell ***,the field of stem cell therapeutics continues to advance at an unprecedented *** remain cautiously optimistic that stem cells will play a role in heart failure management in years to come.

关键词： Stem cells Heart failure Myocardial infarction Regeneration Remodeling Ethical issues