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Metallacycles,metallacages,and their aggregate/optical behavior

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Aggregate

Aggregate 2021年第5期2卷 1-21页

作者： yan Sun Peter J.Stang Department of Chemistry University of UtahSalt Lake CityUtahUSA

Since the first metallacycle was prepared by Verkade in 1983,various metallacycles and metallacages with controllable nanoscale shapes and sizes have been created by modular design and synthesis,showing unique properties that enable applications in catalysis,sensors,and *** from their photophysical properties to their antitumor activities and catalysis was found to be influenced by their ***,it is necessary and helpful to develop a systematic understanding of the relationships among the micro/nanostructures,the resultant photophysical/chemical properties,and the corresponding *** this review,we summarized the latest progress in this area in approximately the past 5 years.

关键词： aggregation coordination-driven assembly emission

Global Complexity Bound of the Inexact Levenberg–Marquardt Method

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Journal of the Operations Research Society of China 2018年第3期6卷 417-428页

作者： Jian-Chao Huang Jin-yan Fan School of Mathematical Sciences Shanghai Jiao Tong UniversityShanghai 200240China School of Mathematical Sciences MOE-LSCShanghai Jiao Tong UniversityShanghai 200240China

In this paper,we investigate the global complexity bound for the inexact Levenberg–Marquardt method,where the Jacobian may be perturbed and the solution is possibly not *** reasonable assumptions,we show that the global complexity bound is O(ε^(−2)),which is the same as the exact *** also show that it can be reduced to O(lgε^(−1))under some regularity assumption.

关键词： Global complexity bound Inexact Levenberg–Marquardt method Nonlinear equations

School and community physical activity characteristics and moderate-to-vigorous physical activity among Chinese school-aged children： A multilevel path model analysis

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Journal of Sport and Health Science 2017年第4期6卷 416-422页

作者： Lijuan Wang yan Tang Jiong Luo School of Physical Education and Sport Training Shanghai University of Sport Shanghai 200438 China Shanghai Research Center for Physical Fitness and Health of Children and Adolescents Shanghai University of Sport Shanghai 200438 China School of Physical Education Southwest University Chongqing 400715 China

Purpose: The purpose of this study was to examine the association between school and community physical activity(PA) characteristics and levels of moderate-to-vigorous physical activity(MVPA) among Chinese school ***: Data were obtained from the 2016 Physical Activity and Fitness in China—The Youth Study project. Participants were 80,928 school children(Grades 4–12; 39,747 boys, 41,181 girls; mean age = 13 years) and 935 physical education(PE) teachers who completed a study *** variables included both school-related factors(school-level PA support, availability of and access to PA facilities, and the duration of school PE classes) and community-related factors(the frequency of sports events, sports training opportunities, availability of sports clubs and organizations, and access to PA facilities). The dependent variable was the children's self-reported participation in MVPA. The data were analyzed,in 2017, via multilevel ***: PA support from school administrators was the only school-level factor significantly related to children's participation in ***'s perceptions of the frequency of community-sponsored sports events, availability of sports clubs and organizations, and convenient access to PA facilities were associated with a high level of MVPA participation. In regard to residency in urban and rural areas, children attending urban schools who perceived high availability of PA facilities were associated with a low level of participation in ***: School support for PA and community PA resources are associated with MVPA among Chinese school children. School PA facilities appear underutilized among urban schools as evidenced by low levels of MVPA among school children.

关键词： Facilities Physical activity support Physical education Rural areas Teachers Urban areas

The role of bacterial signaling networks in antibiotics response and resistance regulation

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Marine Life Science & Technology 2022年第2期4卷 163-178页

作者： Yuying Li Tao Feng yan Wang College of Marine Life Sciences Ocean University of ChinaQingdao266003China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao266003China Laboratory for Marine Ecology and Environmental Science National Laboratory for Marine Science and Technology(Qingdao)Qingdao266071China

Excessive use of antibiotics poses a threat to public health and the *** ecosystems,such as the marine environment,antibiotic contamination has led to an increase in bacterial ***,the study of bacterial response to antibiotics and the regulation of resistance formation have become an important research ***,the processes related to antibiotic responses and resistance regulation have mainly included the activation of efflux pumps,mutation of antibiotic targets,production of biofilms,and production of inactivated or passivation *** recent years,studies have shown that bacterial signaling networks can affect antibiotic responses and resistance *** systems mostly alter resistance by regulating biofilms,efflux pumps,and mobile genetic *** we provide an overview of how bacterial intraspecific and interspecific signaling networks affect the response to environmental *** doing so,this review provides theoretical support for inhibiting bacterial antibiotic resistance and alleviating health and ecological problems caused by antibiotic contamination.

关键词： Bacterial antibiotic resistance AHL AI-2 AIP Indole DSF

Molecular mechanisms of gender disparity in hepatitis B virus-associated hepatocellular carcinoma

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World Journal of Gastroenterology 2014年第20期20卷 6252-6261页

作者： Wei-Cheng Liu Quan-yan Liu Department of General Surgery Research Center of Digestive Diseases Zhongnan Hospital of Wuhan University

Chronic hepatitis B virus(HBV)infection is one of the most common causes of hepatocellular carcinoma(HCC),a malignant tumor with high mortality *** remarkable clinical feature of HBVrelated HCC is that its incidence is higher in males and postmenopausal females compared to other *** evidence indicates that HBV-associated HCC may involve gender disparity and that it may be a type of hormone-responsive malignant *** hormones,such as androgen and estrogen,have been shown to play very different roles in the progression of an HBV infection and in the development of HBVrelated *** binding to their specific cellular receptors and affecting the corresponding signaling pathways,sex hormones can regulate the transactivation of HBx,cause the chronic release of inflammatory cytokines in the hepatocellular microenvironment,and participate in epigenetic and genetic alternations in *** of these functions may be related to the initiation and progression of HBV-associated HCC.A thorough investigation of the molecular mechanisms underlying the gender-related disparity in HBV-related HCC should provide a new perspective for better understanding its pathogenesis and exploring more effective methods for the prevention and treatment of this disease.

关键词： Hepatitis B virus Hepatocellular carcinoma Gender disparity Sex hormones

In vitro biological effects of magnetic nanoparticles

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Chinese Science Bulletin 2012年第31期57卷 3972-3978页

作者： LI yan CHEN ZhongWen GU Ning State Key Laboratory of Bioelectronics Jiangsu Key Laboratory of Biomaterials and DevicesSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China

Magnetic nanoparticles (MNPs) have great potential for a wide use in various biomedical applications due to their unusual properties. It is critical for many applications that the biological effects of nanoparticles are studied in depth. To date, many disparate results can be found in the literature regarding nanoparticle-biological factors interactions. This review highlights recent developments in this field with particular focuses on in vitro MNPs-cell interactions. The effect of MNPs properties on cellular uptake and cytotoxicity evaluation of MNPs were discussed. Some employed methods are also included. Moreover, nanoparticle-cell interactions are mediated by the presence of proteins absorbed from biological fluids on the nanoparticle. Many questions remain on the effect of nanoparticle surface (in addition to nanoparticle size) on protein adsorption. We review papers related to this point too.

关键词：磁性纳米粒子生物效应体外生物医学应用蛋白质吸附相互作用细胞间 MNP

On a Problem of Q. H. yanG and Y. G. CHEN

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Journal of Mathematical Research with Applications 2022年第6期42卷 580-586页

作者： Xiaohui yan School of Mathematics and Statistics Anhui Normal University

For any positive integers k1, k2and any set A■N, let Rk1,k2(A, n) be the number of solutions of the equation n = k1a1+ k2a2with a1, a2∈A. Let ■= NA. yang and Chen proved that if k1and k2are two integers with k2>k1≥2 and(k1, k2) = 1, then there does not exist any set A■N such that Rk1,k2(A, n) = Rk1,k2(■, n) for all sufficiently large integers n. For two integers k>1 and t≥1, define fk(t) to be the number of sets A■N such that R1,k(A, n) = R1,k(■, n) holds for all integers n≥t. yang and Chen proved that fk(t) is finite and limt→∞log fk(t)/t= log 2. They also asked if it is true that for any integers k, l > 1 there exists t0(k, l) such that fk(t) = fl(t) for all integers t≥t0. In this paper, we give the exact formula of fk(t) when t≤k, which implies that fk(t) = fl(t) for all integers t≤min{k, l}.

关键词： representation function partition Sarkozy problem

Effects of antiseizure medications on alternative psychosis and strategies for their application

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World Journal of Psychiatry 2022年第4期12卷 580-587页

作者： Yin yan Jun-Hong Wu Xiao-yan Peng Xue-Feng Wang Department of Neurology the First Affiliated Hospital of Chongqing Medical UniversityChongqing Key Laboratory of NeurologyChongqing 400016China

Forced normalization(FN)is a unique phenomenon that is often seen in the treatment of *** is characterized by abnormal mental behavior and disordered emotions in epilepsy patients despite a significantly improved electroencephalogram and successful seizure control;the occurrence of FN seriously affects patients’quality of *** causes of FN include antiseizure medications(ASMs),epilepsy surgery and vagus nerve stimulation,with ASMs being the most common ***,with the timely reduction or discontinuation of ASMs and the use of antipsychotic drugs,the overall prognosis is ***,we perform an extensive review of the literature pertaining to FN,including its epidemiology,possible mechanisms,clinical features,treatment and prognosis.

关键词： Forced normalization Antiseizure medications Neurotransmitter Antipsychotic drugs Electroshock

Liquid crystal depolarizer based on photoalignment technology

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Photonics Research 2016年第2期4卷 70-73页

作者： Bing-yan Wei Peng Chen Shi-Jun Ge Li-Chao Zhang Wei Hu yan-Qing Lu National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied Sciences Nanjing University Thorlabs China

We propose a depolarizer based on the principle of a collection of half-wave plates with randomly distributed optic axes. The design is demonstrated by means of dynamically photopatterning liquid crystal into randomly aligned homogeneous domains. We characterize the liquid crystal depolarizer for 1550 nm and C-band(1520–1610 nm). A degree of polarization of less than 5% is obtained for any linearly polarized light. This study provides a practical candidate for high-performance depolarizers.

关键词： DOP Liquid crystal depolarizer based on photoalignment technology