显示条目: 17664-17683 / 166236

    • L -DNA molecular beacon: A safe, stable, and accurate intracellular nano-thermometer for temperature sensing in living cells 

      Ke, Guoliang; Wang, Chunming; Ge, Yun; Zheng, Nanfeng; Zhu, Zhi; Yang, Chaoyong James; 郑南峰; 朱志; 杨朝勇 (American Chemical Society, 2012-11-21)
      Noninvasive and accurate measurement of intracellular temperature is of great significance in biology and medicine. This paper describes a safe, stable, and accurate intracellular nano-thermometer based on an l-DNA molecular ...
    • L 公司集散型订单生产周期优化研究 

      林玉煌 (2011-03-08)
      近年来,随着IT行业的迅猛发展,各计算机制造商之间在成本上的竞争越发激烈,各竞争对手都在整合供应链并把其转移到劳动力成本低的地方。随之而变的是,交货时间已成为满足客户需求和提高客户满意度的一个关键因素,交货时间的最重要部分即生产周期成为一个重要的研究课题。 本文以国际知名电脑制造商L公司为研究对象,在L公司供应链多元化及营销战略转型的背景下,其基于零库存按订单生产模式下的集散型订单的生产周期在不断变长,客户抱怨不断增加,客户满意度随之不 ...
    • L(p, q)-Labeling and Integer Flow on Planar Graphs 

      Zhang, Xiaoling; Qian, Jianguo; 张晓玲; 钱建国 (OXFORD UNIV PRESS, 2013)
      Given a graph G and two non-negative integers p and q, an L(p, q)-labeling c of G is an assignment of non-negative integers to the vertices of G such that, for any two vertices u and v, vertical bar c(u) - c(v)vertical bar ...
    • l--n中逐块光滑拟凸域上具有局部全纯核的Leray-Norguet公式 

      林良裕; 许忠义 (1995)
      利用修正的OnO局部化方法和HEnkIn方法,讨论 ̄n中具有逐块光滑边界的拟凸域上可微分函数和全纯函数的具有局部全纯核积分表示,作为应用获得了-方程局部解的lErAy-nOrguET积分公式并证明在含参数局部意义下存在一致估计。
    • L-B膜内银超微粒子的电化学制备及表征 

      谢兆雄; 华炳增; 毛秉伟; 陈衍珍; 田昭武; 张韫宏; 李前树 (1996-12-15)
      在8~14层硬脂酸银L-B膜内,用电化学还原法制备了纳米尺度的银超微粒子,实验表明,银超微粒子的形成是观察多层L-B膜高分辨STM图象的必要条件,利用STM技术不仅观察到8层L-B膜的六方排列的硬脂酸脂链结构,还直接观察到2~3nm直径的球形银超微粒子结构;首次报道L-B膜亲水层原子尺度的网状STM图象,该图象显示了脂链六方的(2×1)结构,是羧基之间由氢键自组织的结果;银超微粒子有很强的表面增强Raman散射效应,由此测得了两层L-B ...
    • L-B膜技术在电化学研究中的应用 

      华炳增 (1996-06-27)
    • L-cysteine-assisted synthesis of PbS nanocube-based pagoda-like hierarchical architectures 

      赵仪 (2008)
      Nanocube-based pagoda-like PbS hierarchical architectures have been fabricated by hydrothermal treatment of Pb(Ac)(2) and L-cysteine solution. It was suggested that a biomimetic mineralization process happened during the ...
    • L-DNA Molecular Beacon: A Safe, Stable, and Accurate Intracellular Nano-thermometer for Temperature Sensing in Living Cells 

      Ke, Guoliang; Wang, Chunming; Ge, Yun; Zheng, Nanfeng; Zhu, Zhi; Yang, Chaoyong James; 郑南峰 (2012-11-21)
      Noninvasive and accurate measurement of intracellular temperature is of great significance in biology and medicine. This paper describes a safe, stable, and accurate intracellular nano-thermometer based on an L-DNA molecular ...
    • L-Histidine-assisted template-free hydrothermal synthesis of α-Fe2O3 porous multi-shelled hollow spheres with enhanced lithium storage properties 

      Wu, Zhen-Guo; Zhong, Yan-; Li, Jun-Tao; Guo, Xiao-Dong; Huang, Ling; Zhong, Ben-He; Sun, Shi-Gang; 李君涛; 黄令; 孙世刚 (Royal Society of Chemistry, 2014 Augus)
      Unique α-Fe2O3 porous multi-shelled hollow spheres (α-Fe2O3 PMSHSs) have been prepared by a simple template-free hydrothermal method followed by annealing in air. For the first time, l-histidine was used as a morphology ...
    • L-P bounds for Marcinkiewicz integrals associated to surfaces of revolution 

      Wu, H. X.; 伍火熊 (2006-09-15)
      In this paper we prove the LP-boundedness of some Marcinkiewicz integral operators along surfaces of revolution. Some size conditions implying the L-P(Rn+1) boundedness of these operators for some fixed 1 < p < infinity ...
    • L-p bounds for singular integrals with rough kernels on product domains 

      Ma, Li; Fan, Da Shan; Wu, Huo Xiong; 伍火熊 (ACTA MATH SIN, 2012-01)
      This paper is concerned with singular integral operators on product domains with rough kernels both along radial direction and on spherical surface. Some rather weaker size conditions, which imply the L (p) -boundedness ...
    • L-p estimates for the commutators of Marcinkiewicz integrals with kernels belonging to certain block spaces 

      Wu, Huoxiong; 伍火熊 (2006)
      This paper is devoted to the study of the L-p-mapping properties of the higher order commutators mu(k)(Omega,a), mu(Omega lambda,a)*(,k) and mu(k)(Omega), S,a, which are formed respectively by a BMO(R-n) function a(x) and ...
    • L-p-BOUNDEDNESS FOR THE COMM000265753900009ATORS OF ROUGH OSCILLATORY SINGULAR INTEGRALS WITH NON-CONVOL000265753900009ION PHASES 

      Wu,HX; 伍火熊 (2009-05)
      In this paper, the author studies the k-th commutators of oscillatory singular integral operators with a BMO function and phases more general than polynomials. For 1 < p < infinity, the L-p-boundedness of such operators ...
    • L-p-BOUNDEDNESS FOR THE COMMUTATORS OF ROUGH OSCILLATORY SINGULAR INTEGRALS WITH NON-CONVOLUTION PHASES 

      Wu, H. X.; 伍火熊 (2009-05)
      In this paper, the author studies the k-th commutators of oscillatory singular integral operators with a BMO function and phases more general than polynomials. For 1 < p < infinity, the L-p-boundedness of such operators ...
    • L-prostaglandin D synthase expression and regulation in mouse testis and epididymis during sexual maturation and testosterone treatment after castration 

      Zhu, H.; Ma, H.; Ni, H.; Ma, X. H.; Mills, N.; Yang, Z. M.; 杨增明 (2004)
      Lipocalin-type prostaglandin D synthase (L-PGDS) is highly expressed in the adult testis and epididymis of many mammals. The present study was to investigate L-PGDS expression in mouse testis and epididymis during sexual ...
    • L-type calcium current in right ventricular outflow tract myocytes of rabbit heart 

      Liang ShengHui; Lin ChenHui; Li Yuan; Liu TaiFeng; Wang Yan; 王焱 (SCI CHINA LIFE SCI, 2012-01)
      The mechanism of idiopathic ventricular tachycardia originating from the right ventricular outflow tract (RVOT) is not clear. Many clinical reports have suggested a mechanism of triggered activity. However, there are few ...
    • L-Valine assisted distinction between the stereo-isomers of D-hexoses by positive ion ESI tandem mass spectrometry 

      Li, Gang; Huang, Zhongbin; Fu, Chuan; Xu, Pengxiang; Liu, Yan; Zhao, Yu-fen; 赵玉芬 (JOHN WILEY & SONS LTD, 2010-05)
      The binary mixtures of 7 hexoses and 20 amino acids were investigated by electrospray ionization ion trap mass spectrometry (ESI-ITMS). The adduct ions of the amino acid and the hexose were detected for 12 amino acids but ...
    • L-半胱氨酸作为化妆品美白添加剂的作用机理 

      杨美花; 李智聪; 刘凤娇; 庄江兴; 王勤; 陈清西 (2009-07-15)
      酪氨酸酶(EC 1.14.18.1)是黑色素形成的关键酶,其抑制剂的研究是当前美白添加剂研究的热点.研究了L-半胱氨酸(L-Cys)对蘑菇酪氨酸酶和小鼠B16黑色素瘤细胞粗提的酪氨酸酶的抑制效应,实验结果表明,L-Cys对2种来源的酪氨酸酶有较强的抑制作用,其半效抑制浓度分别为1.75,15μmol/L.对小鼠B16黑色素瘤细胞粗提的酪氨酸酶的抑制主要表现为显著延长酶促反应的迟滞时间,同时显著降低酶的活力.进一步对L-Cys在细胞毒性方 ...
    • L-叔亮氨酸制备的关键酶偶联体系构建及催化性能研究 

      江伟 (2018-02-28)
      目前,手性药物的市值越来越高从而使得其中间体的生产越来越受到关注。在有机合成中,具有光学活性的氨基酸被广泛的用作辅基、手性原料和诱导不对称反应的诱导剂,具有光学活性的氨基酸也是构成蛋白质、多肽和其他许多重要的天然产物如农药化学品和医药分子的功能模块。L-叔亮氨酸(L-Tle)作为一种非常重要的氨基酸,被广泛的用作不对称合成中活性化合物的基本模块。同时,L-Tle也是制备抗艾滋病药物或抗肿瘤药物的重要中间体。因此,农业和制药行业对于高效合 ...
    • L-异亮氨酸型配体交换固定相对DL-氨基酸的拆分研究 

      黄晓佳; 王秋泉; 王俊德; 黄本立 (2005-03-30)
      用自制的新型L 异亮氨酸配体交换固定相在配体交换模式下对 11种DL 氨基酸进行了拆分研究,详细考察了流动相中铜离子浓度、甲醇含量、流速及温度对拆分效果的影响,并探讨了可能的拆分机理。研究结果表明:流动相中高浓度的铜离子不利于DL 氨基酸的拆分;增加流动相中甲醇的含量,降低流动相流速以及提高色谱柱温度均可改善拆分效果。