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Antileishmanial assessment of leaf extracts from Pluchea carolinensis,Pluchea odorata and Pluchea rosea

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Asian Pacific Journal of Tropical Medicine 2011年第10期4卷 836-840页

作者： Marley Garcia Wilmer h perera Ramon Scull Lianet Monzote Parasitology Department Institute of Medicine Tropical "Pedro Kourl"Havana CityCuba Institute of Ecology and Systematic Havana CityCuba Institute of Pharmacy and Food Havana CityCuba Parasitology Department Institute of Medicine Tropical "Pedro Kouri"Havana CityCuba

Objective:To evaluate the antileishmanial activity of different extracts from three Cuban Pluchea ***:In in vitro assays the IC50was calculated in the promastigotes and amastigotes forms as cytotoxicity in murine *** leishmaniasis cutanea experiment,mortality, weight loss,lesion size and burden parasite were ***:Extracts evaluated showed inhibitive effect on growing of promastigote form;however,active extracts caused a high toxicity. Ethanol and n-hexane extracts demonstrated specific antileishmanial *** and n-hexane extracts from Pluchea carolinensis（***） caused similar inhibition against amastigote *** intraperitoneal administration of the ethanol extract of *** at 100 mg/kg prevented lesion development compared with control ***:The antileishmanial experiment suggests that ethanol extracts from *** is the most *** studies are still needed to evaluate the polential of this plant as a source of new antileishmanial agents.

关键词： Pluchea carolinensis Pluchea odorata Pluchea rosea Medicinal plants Leishmania amazonensis

[Determination of eight phthalate metabolites in urine of pregnant women and evaluation of neonatal birth outcomes based on solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry]

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Se pu = Chinese journal of chromatography 2025年第1期43卷 60-67页

作者： Zi-hao Wang Meng-Fei Xu Bei-ni Li Ping Wu Wei Wu hubei University of Chinese Medicine Wuhan 430065 China.

Phthalates (PAEs) are endocrine-disrupting chemicals that are widely present in everyday life and enter the human body through various pathways. The release of PAEs into the environment through pathways that include leaching, evaporation, abrasion, and the use of personal care products exposes humans to PAEs via ingestion, inhalation, and dermal absorption. Pregnant women, as a particularly vulnerable population, risk adverse newborn growth and development when exposed to PAEs. While the concentrations of PAEs in urine reflect recent exposure levels in humans, urinary levels of phthalate metabolites (mPAEs) are commonly used as biomarkers of internal exposure owing to the relatively short biological half-lives of PAEs (h). In this study, we developed a solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry (SPE-hPLC-MS/MS) method for simultaneously detecting eight mPAEs in the urine of pregnant women. Urine samples were enzymatically hydrolyzed with -glucosidase and then purified using the Bond Elut Plexa SPE column, with subsequent elution, concentration, and redissolved performed prior to hPLC-MS/MS. Separation was achieved using an Agilent Eclipse Plus C18 column (100 mm×3 mm, 3.5 μm), with gradient elution performed using 0.1% acetic acid aqueous solution and 0.1% acetic acid acetonitrile as mobile phases. Multiple reaction monitoring (MRM) mode was used for detection, with quantification performed using the internal-standard method. Good linearities were obtained in the range of 0.1-200 ng/mL for the eight mPAEs, with limits of detection (LODs) and quantification (LOQs) of 0.015-0.048 and 0.050-0.160 ng/mL, respectively. The eight mPAEs exhibited recoveries of 80.2%-99.7% at three spiked levels (1, 10, and 50 ng/mL). This method was subsequently used to analyze the eight mPAEs levels in urine samples of 497 pregnant women from the Ezhou Maternity and Child health Care hospital. The participants exhibited widespread exposure t

关键词： birth outcomes high performance liquid chromatography-tandem mass spectrometry (hPLC-MS/MS) phthalate metabolites (mPAEs) urine samples of pregnant women

QSAR for biotoxication of aromatic compounds

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Chinese Science Bulletin 1997年第5期42卷 380-384页

作者： Liu, ZT Wang, LS ni, h Kong, ZM Chinese Research Academy of Environmental Sciences Beijing China Department of Environmental Science Nanjing University Nanjing China

MANY congeneric chemicals of aromatic hydrocarbons are toxic organic materials. This note uses some available molecular descriptors such as the energy of molecular orbital and the molecular connectivity index to analyse the biotoxicities and the structure-effect relationships of aromatic compounds on aquatic organism and terrestrial mammal in the view of molecular structure and energy with the method of quantitative structure-activity relationship (QSAR),

关键词： classic aromatic compounds biotoxication biotic substitutability estimation.

Dehydration at subduction zones and the geochemistry of slab fluids

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Science China Earth Sciences 2020年第12期63卷 1925-1937页

作者： Wancai Li huaiwei ni CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei230026China CAS Center for Excellence in Comparative Planetology Hefei230026China

Subducting oceanic slabs undergo metamorphic dehydration with the increase of temperature and pressure during *** is an essential step for element recycling,and slab fluids are critical agents for mediating slab-mantle *** is mainly controlled by the thermal structure of subduction zones and the stability of hydrous *** fore-arc depths,slab dehydration produces aqueous fluid with dissolved salts such as *** subduction proceeds deeper,the content of silicate components *** sub-arc and post-arc depths,a hydrous silicate melt is likely to form,or a supercritical fluid could arise from complete miscibility between silicates and h_(2)*** partitioning of elements between slab fluid and the residual solid rock is controlled by the type of fluid,and generally it is the supercritical fluid that is the most capable of mobilizing trace elements,being an effective carrier even for high field strength *** the chemistry of slab fluids relies on sophisticated integration of experiments,theoretical computation and investigation of natural rock *** contribution focuses on the content and speciation of key volatiles,including carbon,nitrogen and sulfur,in slab fluids as well as important fluid properties such as oxygen fugacity and *** properties of slab fluids show complicated variation under the control of mineral assemblages and T-P *** fluids at great depths of subductions have been inferred to be modestly alkaline and not necessarily very oxidizing as often *** progress in the research of slab dehydration and the chemistry and properties of slab fluids demands urgently the development of innovative experimental and computational technology including in situ analytical methods at high T-P.

关键词： Subduction zone Dehydration Slab fluids Volatiles Oxygen fugacity Acidity

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基于刻蚀处理的池沸腾传热性能实验研究

原子与分子物理学报 2025年第3期42卷 180-188页

作者：王菊萍匡纯纯刘妮上海理工大学制冷技术研究所上海200093

为探究刻蚀处理铜板表面对池沸腾传热性能的改善效果,搭建了可视化实验平台,制备不同刻蚀浓度和刻蚀时间处理的表面,采用去离子水为工质,进行饱和池沸腾实验.结果表明,氨水刻蚀浓度越大,表面的换热性能越强,氨水刻蚀时间越长,表面换热... 详细信息

为探究刻蚀处理铜板表面对池沸腾传热性能的改善效果,搭建了可视化实验平台,制备不同刻蚀浓度和刻蚀时间处理的表面,采用去离子水为工质,进行饱和池沸腾实验.结果表明,氨水刻蚀浓度越大,表面的换热性能越强,氨水刻蚀时间越长,表面换热性能越强.热流密度为43.2 W/cm^(2)时,0.05 mol/L氨水刻蚀4 h表面、0.05 mol/L氨水刻蚀5 h表面、0.05 mol/L氨水刻蚀8 h表面、0.03 mol/L氨水刻蚀4 h表面、0.05 mol/L氨水刻蚀4 h表面和0.10 mol/L氨水刻蚀4 h表面上的换热系数分别提高了46%、92%、105%、36%、45%、78%.此外,对其表面进行表征,结果说明了其优异的沸腾性能.刻蚀处理增强了表面粗糙度,有效面积,从而促进液体的补充,能够在较小的过热度下达到更高的临界热流密度.可视化研究结果表明,刻蚀表面具有更多的成核位点,更小的气泡离开直径和离开频率.这些结果显示出刻蚀表面强化池沸腾换热的潜力.

关键词：池沸腾刻蚀传热性能气泡动力学微纳结构表面

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Evaluation of fall armyworm resistance in maize germplasm lines using visual leaf injury rating and predator survey

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Insect Science 2014年第5期21卷 541-555页

作者： Xinzhi ni Wenwei Xu Michael h. Blanco W. Paul Williams USDA-ARS Crop Genetics and Breeding Research Unit University of Georgia-Tifton Tifton GA 31793 Agricultural Research &Extension Center Texas A&M University Lubbock TX 79403 USDA-ARS Plant Introduction Research Unit Iowa State UniversityAmes IA 50011 Corn host Plant Resistance Research Unit USDA-ARS Mississippi State MS 39762 USA

After examining ear-colonizing pest resistance, 20 maize lines from the USDA- ARS Germplasm Enhancement of Maize （GEM） Program were evaluated for whorl-feeding fall armyworm （FAW）（Spodopterafrugiperda） resistance using 4 maize inbred lines as the resistant and susceptible controls. Both FAW injury ratings at 7- and 14-d after infestation, and predator abundance and diversity at whorl stage （V6-V8） were recorded in 2009 and 2010. The survey of the diversity and abundance of predators in each experimental plot were conducted 7 d after the FAW infestation. Of the 20 germplasm lines examined, 3 of them （i.e., entries 9, 15, and 19 that were derived from tropical maize germplasm lines were originated from Uruguay, Cuba, and Thailand, respectively） were identified as the best FAW-resistant germplasm lines using the leaf injury ratings and predator survey data. In addition, the abundance and diversity of the predators were greater in 2010 than in 2009, which might have caused the low level of the FAW injury ratings on all lines examined in 2010. The 2-year data showed that the FAW injury ratings were negatively correlated to the predator abundance and diversity, which is also influence by genotype × environment interactions. The findings suggested that tropical germplasm is an important source of native resistance to the FAW and the corn earworm. At the same time, the maize genotype x environment interaction （e.g., predator attractiveness, and varying weather conditions） should be included in the multiple-year evaluations of insect and disease resistance of maize germplasm lines under field conditions.

关键词： field screening genotype × environment interactions multiple insect resistance predator abundance and diversity whorl-feeding

Extension of Isometries on the Unit Sphere of L^p Spaces

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Acta Mathematica Sinica,English Series 2012年第6期28卷 1197-1208页

作者： Dong ni TAN Department of Mathematics Tianjin University of Technology School of Mathematical Science Nankai University

In this paper we study the isometric extension problem and show that every surjective isometry between the unit spheres of L^p（μ）（1 〈 p 〈∞, p ≠ 2） and a Banach space E can be extended to a linear isometry from L^p（μ） onto E, which means that if the unit sphere of E is （metrically） isometric to the unit sphere of L^P（μ）, then E is linearly isometric to L^p（μ）. We also prove that every surjective 1-Lipschitz or anti-l-Lipschitz map between the unit spheres of L^p（μ1, h1） and L^p（μ2, h2） must be an isometry and can be extended to a linear isometry from L^p（μ2, h2） to L^p（μ2, h2）, where h1 and h2 are hilbert spaces.

关键词： Tingley's problem 1-Lipschitz anti-l-Lipschitz isometry isometric extension

Output Feedback h~∞ Control for a Class of Nonlinear Stochastic Systems

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Acta Mathematicae Applicatae Sinica 2010年第2期26卷 251-266页

作者： Yuan-hua ni Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and SystemsScience Chinese Academy of Sciences Beijing 100190 China

This paper deals with the output feedback h∞ control problem for a class of nonlinear stochastic systems. Based on the latest developed theory of stochastic dissipation, a notable result about the nonlinear h∞ output feedback control of deterministic system is generalized to the stochastic case. Finally, in the cases of state feedback and output feedback, two families of controllers are provided respectively.

关键词： h∞ control stochastic nonlinear systems hamilton-Jacobi-Isaacs equations output feedback

Status of two Coreius species in the Three Gorges Reservoir,China

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Chinese Journal of Oceanology and Limnology 2016年第1期34卷 19-33页

作者：夏雨果 J.LLORET 李钟杰张堂林叶少文李为苑晶 h.A.C.C.perera 刘家寿 State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China Faculty of Sciences Campus MontiliviUniversity ofGirona17071 Girona(Catalonia)Spain

Dam construction alters natural flow regimes which,in turn,cause significant changes in fish communities during and after impoundment. The construction of the Three Gorges Reservoir,from impoundment of the Changjiang(Yangtze) River,China,may have affected native fish species. Thus,the status of two lotic freshwater fish species,Coreius heterodon and ***,were monitored in the Three Gorges Reservoir,including fish abundance,individual composition,growth,condition,and mortality. Data on both species were gathered from upstream,midstream and downstream areas of the reservoir and,where available,from studies published before and after dam construction. Lower abundance,slower growth,a less diversified age structure,poorer fish condition(indicated by hepatosomatic index) and higher mortalities were recorded in sites nearest the dam compared with upstream areas. Furthermore,after final impoundment,individual Coreius species inhabiting the area changed,with young individuals becoming more abundant,while upstream of the reservoir the two Coreius species became smaller at a given age. The results show that the status of the two Coreius species was subject to dramatic changes after impoundment.

关键词： Three Gorges Reservoir Coreius species status age profile growth impoundment