检索结果-南通市图书馆

Recent developments in the detection of melamine

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2012年第7期13卷 525-532页

作者： Yuan LIU Ewen E.d.todd Qiang ZHANG Jiang-rong sHI Xian-jin LIU Key Laboratoy.of Food Quality and safety of Jiangsu Province Nanjing 210014China Michigan state Universities East Lansing 48824-1212USA

In recent years,there were two reported outbreaks of food borne illness associated with *** presence of melamine and its related compounds in milk,feed,and other foods has resulted in the need for reliable methods for the detection and accurate quantification of this class of *** sample pretreatment for melamine in a complex matrix usually involves a liquid extraction by a polar solvent,followed by a further clean-up with solid phase *** of melamine and related compounds are commonly carried out by liquid or gas chromatographic methods conjugated with mass *** innovative screening methods,which use antibodies,molecularly imprinted polymers,capillary electrophoresis,and gold nanoparticles,are also used to develop assays and biosensors to ***,many of these methods have been hindered by matrix effects,the solubility of melamine-cyanuric acid complex,and background *** article reviews recent developments for detecting melamine and discusses future directions.

关键词： Melamine detection Confirmation methods screening methods sample pretreatment

Vagus nerve stimulation in intracerebral hemorrhage:the need for further research

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3213-3214页

作者： sheharyar s.Baig Ali N.Ali Arshad Majid sheffield Institute for Translational Neuroscience Division of NeuroscienceThe University of SheffieldSheffieldUK

Vagus nerve stimulation(VNs)and stroke:stroke is the second leading cause of death and the third leading cause of disability worldwide(Baig et al.,2023).There have been significant paradigm shifts in the management of acute ischemic stroke through mechanical *** chronic ischemic stroke,invasive VNs paired with rehabilitation is associated with a significant increase in upper limb motor recovery and is FdA-approved(Baig et al.,2023).There are no treatments of similar efficacy in acute intracerebral hemorrhage(ICH)where several promising trials,e.g.,TICH-2,sTOP-AUsT,and TRAIGE did not show improvements in functional outcomes(Puy et al.,2023).

关键词： stimulation acute

Upper bounds on a two-term exponential sum

在线全文

学校读者我要写书评

暂无评论

science China Mathematics 2001年第8期44卷 1003-1015页

作者： todd COCHRANE 郑志勇 department of Mathematics Kansas State University Manhattan KS 66506 USA department of Mathematics Tsinghua University Beijing 100084 China

We obtain upper bounds for mixed exponential sums of the type $s(\chi ,f,p^m ) = \sum\nolimits_{x = 1}^{p^n } {\chi (x)e} _{p^m } (ax^n + bx)$ where pm is a prime power with m? 2 and X is a multiplicative character (mod pm). If X is primitive or p?(a, b) then we obtain |s(χ,f,p m)| ?2np 2/3 m . If X is of conductor p and p?( a, b) then we get the stronger bound |s(χ,f,p m)|?np m/2.

关键词： exponential sums primitive character weil’sbound

A detailed study of metallic glass formation in copper-hafnium-titanium alloys

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica sinica(English Letters) 2012年第6期25卷 409-419页

作者： Ignacio A.Figueroa sandro Baez-Pimiento John d.Plummer Omar Novelo-Peralta Hywell A.davies Iain todd department of Metallic and Ceramic Materials Institute for Materials ResearchNational Autonomous University of Mexico(UNAM)Mexico D.F.C.P.04510Mexico department of Materials Imperial College LondonRoyal School of MinesPrince Consort RoadSW7 2BPU.K. department of Materials science and Engineering University of SheffieldMappin StSheffield S1 3JDU.K.

Recently we have reported a number of bulk glass forming compositions in the CuHf-Ti system,with the critical thickness for complete glass formation,dc,ranging from 2 mm to 4 *** order to improve the glass forming ability （GFA） getting even larger dc,the prevailing approach is to use complex multicomponent *** strategy has been investigated by us for the Cu-Hf-Ti bulk glass forming alloy Cu55Hf25Ti20 using 〉1 *** additions of B,Y,Nb,Ta,Al,Mn,si or V but with no significant improvement in the ***,it is necessary,in order to utilise the full potential of the base ternary system,to identify the best glass-forming compositions as a basis for extending the search into multi-dimensional compositional ***,CuxHfyTiz alloys,where x=（40-70） ***,y=（5-30） ***,and z=（10-36） ***,were prepared by melt spinning andcopper mould *** composition dependence of the GFA for the Cu-Hf-Ti alloys,as measured by dc for rod and ribbon samples,is reported over the composition range given above.

关键词： Metallic glass formation Glassy Cu-Hf-Ti alloy Glass formingability Melt spinning Copper mould suction-casting

Oligodendroglial heterogeneity in health,disease,and recovery:deeper insights into myelin dynamics

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3179-3192页

作者： Pieter-Jan serneels Julie d.de schutter Lies de Groef Lieve Moons steven Bergmans KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionNeural Circuit Development&Regeneration Research GroupLeuvenBelgium KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionCellular Communication&Neurodegeneration Research GroupLeuvenBelgium

decades of research asserted that the oligodendroglial lineage comprises two cell types:oligodendrocyte precursor cells and ***,recent studies employing single-cell RNA sequencing techniques have uncovered novel cell states,prompting a revision of the existing *** forward,the oligodendroglial lineage should be delineated into five distinct cell states:oligodendrocyte precursor cells,committed oligodendrocyte precursor cells,newly formed oligodendrocytes,myelin-forming oligodendrocytes,and mature *** new classification system enables a deeper understanding of the oligodendroglia in both physiological and pathological *** this uniform terminology will facilitate comparison and integration of data across ***,including the consolidation of findings from various demyelinating models,is essential to better understand the pathogenesis of demyelinating ***,comparing injury models across species with varying regenerative capacities can provide insights that may lead to new therapeutic strategies to overcome remyelination ***,by standardizing terminology and synthesizing data from diverse studies across different animal models,we can enhance our understanding of myelin pathology in central nervous system disorders such as multiple sclerosis,Alzheimer's disease,and amyotrophic lateral sclerosis,all of which involve oligodendroglial and myelin dysfunction.

关键词： animal models demyelination fish mammals multiple sclerosis myelin neurodegeneration oligodendrocytes oligodendroglial lineage remyelination

Nucleoside modified mRNA-lipid nanoparticles as a new delivery platform for the repair of the injured spinal cord

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2311-2312页

作者： Krisztián Pajer Tamás Bellák Antal Nógrádi department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary

spinal cord injury and treatment opportunities:The adult mammalian spinal cord has a very limited capacity for spontaneous regeneration due to various intrinsic molecular and cellular *** the spinal cord neurons have the capacity to regenerate their axons,the expression of growth inhibitory factors,lack or suppression of proper guidance cues,and profound inflammatory responses do not permit successful regeneration(Khyeam et al.,2021).

关键词： injured capacity modified

Between Human and Animal： A study of New Year＇s sacrifice, Kong YijL and diary of a Madman

在线全文

学校读者我要写书评

暂无评论

Frontiers of Literary studies in China-selected Publications from Chinese Universities 2012年第3期6卷 374-392页

作者： todd Foley department of East Asian studies New York University New York NY 10003 USA

A subtle aspect of Lu Xun＇s writing, running through several of his works of fiction, is his animalistic portrayal of some of his most well-known characters. scraping away their humanity as he writes, Lu Xun depicts Kong Yiji, Xianglin sao, and the infamous Madman crawling on their hands and knees, working like draught animals, and abandoning all rational thought. In short, all three end up occupying an ambiguous space between the realms of human and animal. This paper attempts to examine how Lu Xun＇s description and situation of these characters suggests, aside from the standard agendas of May Fourth writing in general, a certain, shared metaphysical conundrum. drawing on the work of Giorgio Agamben to take the hiatus between human and animal as an occasion for ontological possibility, I will investigate how the dehumanized portrayal of these characters situates them at the threshold of a new becoming： one which has not yet been realized, but which is also rendered impossible either through the character＇s death or return to health. Examining Lu Xun＇s works in this way not only recognizes his major emphasis on social critique, but suggests both that his thought on Chinese society pierces through to the level of metaphysical inquiry, and that the relationship between human and animal marks a productive entry point for this sort of questioning.

关键词： Lu Xun animality Agamben metaphysics Kong Yiji Xianglin sao Madman

Logarithmic Regge pole

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

Chinese Physics C 2020年第10期44卷 41-50页

作者： s.d.Campos Applied Mathematics Laboratory-CCTs/dFQM Federal University of Sâo CarlosSorocabaSão Paulo CEP 18052780Brazil

This work presents the subtraction procedure and the Regge cut in the logarithmic Regge pole *** subtraction mechanism leads to the same asymptotic behavior as previously obtained in the non-subtraction *** Regge cut,in contrast,introduces a clear role to the non-leading contributions for the asymptotic behavior of the total *** these results,some simple parameterization is introduced to fit the experimental data for the proton-proton and antiproton-proton total cross-section above some minimum value up to the *** fit parameters obtained are used to present predictions for the ρ(s)-parameter as well as to the elastic slope B(s)at high energies.

关键词： Regge pole double pomeron ρ-parameter total cross section

An Iterative Relaxation Approach to the solution of the Hamilton-Jacobi-Bellman-Isaacs Equation in Nonlinear Optimal Control

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica sinica 2018年第1期5卷 360-366页

作者： M.d.s.Aliyu department of Electrical Engineering King Faisal University Al-Ahsa 31982 Saudi Arabia IEEE

In this paper, we propose an iterative relaxation method for solving the Hamilton-Jacobi-Bellman-Isaacs equation(HJBIE) arising in deterministic optimal control of affine nonlinear systems. Local convergence of the method is established under fairly mild assumptions, and examples are solved to demonstrate the effectiveness of the method. An extension of the approach to Lyapunov equations is also discussed. The preliminary results presented are promising, and it is hoped that the approach will ultimately develop into an efficient computational tool for solving the HJBIEs.

关键词： Affine nonlinear system bounded continuous function convergence Hamilton-Jacobi-Bellman-Isaacs equation Lyapunov equation relaxation method Riccati equation