检索结果-南通市图书馆

Synthesis and Insecticidal Activities of Novel Analogues of Chlorantraniliprole Containing Nitro Group

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

Chemical Research in Chinese Universities 2011年第4期27卷 610-613页

作者： FENG Qi WANG Ming-zhong XIONG li-xia liU zhi-li li zheng-ming State Key Laboratory of Elemento-Organic Chemistry Institute of Elemento-Organie Chemistry Nankai University Tianjin 300071 P. R. China

Twelve novel analogues of chlorantraniliprole containing nitro group were synthesized,and their structures were characterized by 1H NMR and high-resolution mass spectrometry（HRMS）.Their evaluated insecticidal activities against oriental armyworm（Mythimna separata） indicate that the nitro-containing analogues showed favorable insecticidal activities,while the activity of compounds 5g at 0.25mg/L was 40%,but still lower than chlorantraniliprole.

关键词： Chlorantraniliprole Nitro Insecticidal activity Anthranilic diamide

Inhibitory effect of schisandrin B on gastric cancer cells in vitro

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第48期13卷 6506-6511页

作者： Xiao-Ni liu Cheng-Yu Zhang Xiu-Dong Jin Yue-Zhen li Xue-zhi zheng li li Department of Physiology Mudanjiang Medical College Mudanjiang 157011 Heilongjiang Province China

AIM： To investigate the inhibitory effect and possible mechanism of action of schisandrin B in SC-B on gastric cancer cells in vitro.METHODS： SC-B consisted of schisandrin B, aloeemodin, and Astragalus polysaccharides. Exponentially growing human gastric cancer SGO7901 cells were divided into six treatment groups：（1） control group （RPMI 1640 medium）; （2） negative control group （2% DMSO）; （3） positive control group （50 mg/L 5-Fluorouracil, 5-FU）; （4） low-dose group （LSC, final concentration of schisandrin B, 25 mg/L）, （5） moderate-dose group （MSC, final concentration of schisandrin B, 50 mg/L）; （6） highdose group （HSC, final concentration of schisandrin B, 100 mg/L）. Follow-up was done at 12-48 h. An MTT （Methylthiazolyldiphenyl-tetrazolium bromide） assay was used to examine the inhibitory effect of SOB on gastric cancer cells. The mitosis index was assessed using an inverted microscope. Flow cytometry was used to visualize the cell cycle. An RT-PCR （Reverse transcription-Polymerase chain reaction） -based assay was used to detect mRNA expression for cyclin D1 and glyceraldehyde-3-phosphate dehydrogenase （GAPDH）.RESULTS： The MTT assay showed that the number of living cells in the LSC, MSC and HSC groups was significantly smaller than that in the DMSO-treated group （P 〈 0.05） at 12-48 h. The inhibitory rate （IR） of the LSC group was 41.15% ± 3.86%, 59.24% ± 5.34% and 69.93% ± 7.81% at 12, 24 and 48 h, respectively. The IR of the MSC group was 42.82% ± 4.94%, 62.68% ± 7.58% and 71.79% ± 8.12% at 12, 24 and 48 h, respectively. The IR of the HSC group was 37.50% ± 3.21%, 40.34% ± 2.98% and 61.99% ± 4.88% at 12, 24 and 48 h, respectively. These results suggested that a moderate dosage had the most obvious inhibitory efficacy at 48 h. Compared to the DMSO group, the mitosis index of the LSC, MSC, HSC groups was greatly decreased （P 〈 0.05） at all time points. Any dose of SC-B suppressed mitosis within 12-48 h. Compared to the DMSO group, the percentage of cells in the

关键词： Aloe-emodin Astragalus polysaccharides Cell cycle Cyclin D1 Gastric cancer Schisandrin B

Simulation of Potential Production and Optimum Population Quantitative Indices for the Second Hybrid Rice

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

Agricultural Sciences in China 2006年第7期5卷 498-505页

作者： YAN li-Jiao YAO Zhong zheng zhi-ming li Hua-bin Agro-Ecology Institute Life Science College Zhejiang University Hangzhou 310029 P.R.China

The article established the HDRICE model by modifying the structure of the ORYZA1 model and revising its parameters by field experiments. The HDRICE model consists of the modules of morphological development of rice, daily dry matter accumulation and partitioning, daily CO2 assimilation of the canopy, leaf area, and tiller development. The model preferably simulated the dynamic rice development because of the thorough integration of the effects of temperature and light on the rates of rice development, photosynthesis, respiration, and. other ecophysiological processes. In addition, this model has attainable grain yield in the test experiment that showed the potential yield of cultivar Xieyou 46 ranged from 11 to 13 tons ha-~. Besides, the model was used to optimize the combinations of the transplanting date, seedling age and density for cultivar Xieyou 46 at Jinhua area, and the population quantitative indices to attain the potential yield such as maximum stems, effective panicles, filled grain number/leaf area, and so on. The result showed that the combination of transplanting date on July 25, seedling age of 35 days and base seedling density of 1.33 x 106ha-1 is the optimum combination for the second hybrid rice production in Jinhua County, China. And the maximum stems, the effective panicles, the filled grain per panicle, the peak of optimum LAI, LAI in later filling stage, and the filled grain number/leaf were 6.03×10^6ha, 3.99×10^6ha, 119.2, 8.59, 5-6, and 0.64, respectively.

关键词： simulation model potential production optimum population quantitative indices second hybrid rice

ELECTRICAL PROPERTIES OF CONDUCTIVE POLYMER COMPOSITES PREPARED BY AN INNOVATIONAL METHOD

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2010年第6期28卷 869-876页

作者： Chang Lu Cui-yun liu zhi-zheng li Tao Jiang Ji-chun liu Shu-ge Peng Yu-qing Zhang Key Lab of Polymer Science and Nanotechnology Chemical Engineering&Pharmaceutics SchoolHenan University of Science and TechnologyLuoyang 471003China

An innovational method that poly(styrene-co-maleic anhydride)(SMA),a compatibilizer of immiscible nylon6/polystyrene(PA6/PS) blends,was first reacted with carbon black(CB) and then blended with PA6/PS,has been employed to prepare the PA6/PS/(SMA-CB) composites of which CB localized at the *** PA6/PS/CB blends,CB was found to preferentially localize in the PA6 ***,in the PA6/PS/(SMA-CB) blends,it was found that CB particles can be induced by SMA to localize at the *** electrical porperties of PA6/PS/(SMA-CB) composites were *** results showed that the composites exhibited distinct triple percolation behavior,*** percolation is governed by the percolation of CB in SMA phase,the continuity of SMA-CB at the interface and the continuity of PA6/PS *** percolation threshold of PA6/PS/(SMA-CB) was only 0.15 wt%,which is much lower than that of PA6/PS/***,the PTC(positive temperature coefficient) intensity of PA6/PS/(SMA-CB) composites was stronger than that of PA6/PS/CB and the negative temperature coefficient(NTC) effect was *** electrical properties of PA6/PS/(SMA-CB) were explained in terms of its special interface morphology:SMA and CB localize at interphase to form the conductive pathways.

关键词： Polymer composites Carbon black Morphology Electrical properties

Study on High-Performance Computing for Simulation of End Milling Force

在线全文

学校读者我要写书评

暂无评论

厦门大学学报（自然科学版） 2002年第S1期41卷 183-184页

作者： ZHANG zhi-hai, zheng li, li zhi-zhong, liU Da-cheng, ZHAN G Bo-peng (Department of Industry Engineering, Tsinghua University, Beijing 1000 84, China)

Milling Process Simulation is one of the important re search areas in manufacturing science. For the purpose of improving the prec ision of simulation and extending its usability, numerical algorithm is more and more used in the milling modeling areas. But simulative efficiency is decreasin g with increase of its complexity. As a result, application of the method is lim ited. Aimed at above question, high-efficient algorithm for milling process sim ulation is studied. It is important for milling process simulation’s applicatio n. Parallel computing is widely used to solve the large-scale computation question s. Its advantages include system flexibility, robust, high-efficient computing capability and high ratio of performance to price. With the development of compu ter network, utilizing the computing resource in the Internet, a virtual computi ng environment with powerful computing capability can be consisted by microc omputers, and the difficulty of building hardware environment which is used to s upport parallel computing is reduced. How to use network technology and parallel algorithm to improve simulative effic iency for milling forces simulation is investigated in the paper. In order to pr edict milling forces, a simplified local milling forces model is used in the pap er. End milling cutter is assumed to be divided by r number of differential elem ents along the axial direction of the cutter. For a given time, the total cuttin g forces can be obtained by summarizing the resultant cutting force produced by each differential cutter disc. Divide the whole simulative time into some segmen ts, send these program’s segments to microcomputers in the Internet and obtain the result of the program’s segments, all of the result of program’s segments a re composed the final result. For implementing the algorithm, a distributed Parallel computing framework is de signed in the paper. In the framework, web server plays a role of controller. Us ing Java RMI(remote method int

关键词： end-milling force model simulation high-perfo rmance computing parallel algorithm Java RMI

在线全文

学校读者我要写书评

暂无评论

欧洲山杨在山西的适应性评价

西部林业科学 2018年第1期47卷 6-10页

作者：郑智礼山西省林业科学研究院山西太原030012

1984-1997年,山西省实施中德林业技术合作"速生树种造林"项目期间,从德国引进欧洲山杨到山西,在全省不同区域栽植试验。23年后调查欧洲山杨的生长表现情况,通过生长量分析,以及综合赋分适应性评价,结果表明,欧洲山杨在不同试验区域的生... 详细信息

1984-1997年,山西省实施中德林业技术合作"速生树种造林"项目期间,从德国引进欧洲山杨到山西,在全省不同区域栽植试验。23年后调查欧洲山杨的生长表现情况,通过生长量分析,以及综合赋分适应性评价,结果表明,欧洲山杨在不同试验区域的生长量明显大于对照或与对照差异不显著;欧洲山杨在山西基本适应,最适生长区为山西中南部的山区。

关键词：欧洲山杨山西适应性

Impact of Bubbles on Mechanical Performances in a Borosilicate Glass

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 25-29页

作者： li Chengxing li Dongfeng MA Shilong QIAO Ang zheng Qingshuang China Helicopter Research and Development Institute Jingdezhen 333001China State Key Laboratory of Silicate Materials for Ar-chitectures Wuhan University of TechnologyWuhan 430070China

To analyze the impact of bubbles on the mechanical behavior of glasses,by controlling the refining time,we prepared three borosilicate glasses with the same composition and different *** the analysis software integrated within the optical microscope,the diameter and number of the bubbles on the surface of three borosilicate glasses were *** the hardness and crack initiation resistance(CR),we built the relationship between the porosity and the mechanical performance of these borosilicate glasses.

关键词： bubbles oxide glass hardness creak initiation resistance

在线全文

学校读者我要写书评

暂无评论

中空液滴碰撞水平壁面数值分析

物理学报 2017年第1期66卷 235-244页

作者：郑志伟李大树仇性启崔运静中国石油大学(华东)化学工程学院青岛266580 中海油研究总院北京100028 中国石油大学(华东)机电工程学院青岛266580

采用耦合水平集-体积分数法并综合考虑传热及接触热阻作用建立了中空液滴碰撞水平壁面数值模型,并验证了模型的可靠性.通过分析计算结果,获得了中空液滴与实心液滴撞壁的动力学特征差异,揭示了中空液滴撞壁流动传热机理和中心射流形成机... 详细信息

采用耦合水平集-体积分数法并综合考虑传热及接触热阻作用建立了中空液滴碰撞水平壁面数值模型,并验证了模型的可靠性.通过分析计算结果,获得了中空液滴与实心液滴撞壁的动力学特征差异,揭示了中空液滴撞壁流动传热机理和中心射流形成机制,探索了碰撞速度和壁面浸润性对中空液滴撞壁动力学和传热特性的影响.研究表明:中空液滴撞壁后中心射流特征明显,并伴随有射流收缩和液壳破碎等现象.中空液滴内部压力梯度是液滴铺展、中心射流产生和发展的主要原因;撞壁过程中中心射流表面温度分布较为均匀,破碎液壳表面温度分布波动较大.碰撞速度与中空液滴撞壁最大铺展系数的相关性较小,但其对无量纲射流长度和壁面平均热流密度的影响较大;壁面浸润性与中空液滴撞壁后期铺展系数的相关性较大,但其对无量纲射流长度和壁面平均热流密度的影响较小.

关键词：中空液滴液滴撞壁中心射流

Precise gradient separation of nanoparticles using reduced graphene oxide-polyoxomolybdate membranes

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 209-216页

作者： Yixin Yang Wanlei Zhao Ruoxuan zheng Hongqiang li Wei Chen Yu-Fei Song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Quzhou Institute for Innovation in Resource Chemical Engineering

The purification and size sieving of nanoparticles （NPs） represents a significant scientific ***,the r GO-polyoxometalates (POMs=PMo12,Mo132and Mo368) membranes were fabricated successfully via a simple and scalable POMsassisted in-situ photoreduction *** the mass ratio of r GO to PMo12was 1:30,the resultant r GO-PMo12membranes with highly ordered and uniform nanochannels of 1.0 nm can be obtained,which showed an accurate carbon quantum dots（CQDs） separation with a cut-off size approximately 1.0 *** increase of the size of the interlayered POMs from PMo12（1.0 nm）,{Mo132}（2.9 nm） to{Mo368}（3.8 nm）,the resultant r GO-PMo12,r GO-Mo132and r GO-Mo368exhibited precise gradient separation of CQDs and Au nanoparticles by size exclusion *** results pave a promising way to construct new twodimensional （2D） membranes for highly efficient size-selective separation.

关键词： reduced graphene oxide polyoxometalates membranes gradient separation nanoparticles