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Search Results: 1 - 10 of 52809 matches for " Gui-Zhou Tao "
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Effects of tirofiban on the reperfusion-related no-reflow in rats with acute myocardial infarction
Xiao Liu,Gui-Zhou Tao
老年心脏病学杂志(英文版) , 2013,
Abstract: Objective To investigate the effects of tirofiban on the no-reflow phenomenon of acute myocardial infarction (AMI) rats received reperfusion, as well as the underlying mechanisms. Methods Fifty-six male Sprague-Dawley rats were randomly divided into four groups: Sham operation group (Sham), AMI/reperfusion group (AMI/R), Tirofiban group (Tiro) and Tiro+N-nitro-L-arginine group (L-NNA; an endothelial nitric oxide synthase inhibitor). To generate the animal model mimicking the no-reflow phenomenon, the rats first received occlusion of the left anterior descending coronary artery for 60 min and then followed by reperfusion for 120 min. Area of no-reflow, area at risk and area of necrosis were measured by thioflavine S, Evans blue and triphenyl tetrazolium chloride staining, respectively. Haemodynamic function was measured at the end. In the meantime, nitric oxide synthase (NOS) activity was determined by a NOS assay kit. The expression of myocardial endothelial nitric oxide synthase (eNOS) was determined by an enzyme-linked immunosorbent assay (ELISA). The expression of phosphorylated eNOS at Ser1177 (p-eNOS Ser1177) and vascular endothelial-cadherin (VE-cadherin) were determined by western blot. Results Compared with AMI/R group, tirofiban significantly reduced the no-reflow area and infarct size (all P < 0.05). Tirofiban elevated eNOS activity, lessen inducible nitric oxide synthase (iNOS) activity and increased the expression of Ser1177 phosphorylated eNOS and VE-cadherin in the ischemic myocardium (all P < 0.05). No statistical differences were found in the expression of eNOS among the four groups. Also, tirofiban improved cardiac function with significantly higher levels of left ventricular end systolic pressure, maximum change rate of left ventricular pressure rise and fall, heart rate, and lower level of left ventricular end diastolic pressure than those of the AMI/R group (all P < 0.05). Whereas, these effects of tirofiban were partially abolished by L-NNA. Conclusions Tirofiban could reduce the size of no-reflow and infarct. A possible mechanism underlying this effect is that tirofiban could protect the structural and functional integrity of microvascular endothelium which is partially regulated by eNOS activity.
Effects of tirofiban on the reperfusion-related no-reflow in rats with acute myocardial infarction
Effects of tirofiban on the no-reflow of reperfused rats with acute myocardial infarction

Xiao Liu,Gui-Zhou Tao,
Xiao Liu
,Gui-Zhou Tao

老年心脏病学杂志(英文版) , 2013,
Abstract: Objective To investigate the effects of tirofiban on the no-reflow phenomenon of acute myocardial infarction (AMI) rats received reperfusion, as well as the underlying mechanisms. Methods Fifty-six male Sprague-Dawley rats were randomly divided into four groups: Sham operation group (Sham), AMI/reperfusion group (AMI/R), Tirofiban group (Tiro) and Tiro+N-nitro-L-arginine group (L-NNA; an endothelial nitric oxide synthase inhibitor). To generate the animal model mimicking the no-reflow phenomenon, the rats first received occlusion of the left anterior descending coronary artery for 60 min and then followed by reperfusion for 120 min. Area of no-reflow, area at risk and area of necrosis were measured by thioflavine S, Evans blue and triphenyl tetrazolium chloride staining, respectively. Haemodynamic function was measured at the end. In the meantime, nitric oxide synthase (NOS) activity was determined by a NOS assay kit. The expression of myocardial endothelial nitric oxide synthase (eNOS) was determined by an enzyme-linked immunosorbent assay (ELISA). The expression of phosphorylated eNOS at ser sup>1177 (p-eNOS ser1177) and vascular endothelial-cadherin (VE-cadherin) were determined by western blot. Results Compared with AMI/R group, tirofiban significantly reduced the no-reflow area and infarct size (all P < 0.05). Tirofiban elevated eNOS activity, lessen inducible nitric oxide synthase (iNOS) activity and increased the expression of Ser1177 phosphorylated eNOS and VE-cadherin in the ischemic myocardium (all P < 0.05). No statistical differences were found in the expression of eNOS among the four groups. Also, tirofiban improved cardiac function with significantly higher levels of left ventricular end systolic pressure, maximum change rate of left ventricular pressure rise and fall, heart rate, and lower level of left ventricular end diastolic pressure than those of the AMI/R group (all P < 0.05). Whereas, these effects of tirofiban were partially abolished by L-NNA. Conclusions Tirofiban could reduce the size of no-reflow and infarct. A possible mechanism underlying this effect is that tirofiban could protect the structural and functional integrity of microvascular endothelium which is partially regulated by eNOS activity.
Effects of Light and Nitrogen Level on Leaf Growth and Photosynthesis of Rauvolfia vomitoria
光强和施氮量对催吐萝芙木叶片生长及光合作用的影响

LI Lei,CAI Chuan-Tao,LIU Gui-Zhou,
黎蕾
,蔡传涛,刘贵周

植物科学学报 , 2010,
Abstract: A pot culture experiment was conducted to study leaf growth and photosynthetic characteristics of Rauvolfia vomitoria plants under different light intensities (15%,40%,and 70% of full sunlight) and nitrogen levels (15,30,and 60 g/per plant).Results showed that the net photosynthesis rate (Pn),stomatal conductance (Gs),water utilization efficiency (WUE),chlorophyll contents (Chl),specific leaf area (SLA),and leaf mass ratio (LMR) were significantly influenced by light intensity and nitrogen level (p<0.01).Th...
Effect of light intensity and nitrogen level on growth and biomass of Rauvolfia vomitoria
光强和施氮量对催吐萝芙木生长及生物量的影响

LI Lei,CAI Chuan-Tao,LIU Gui-Zhou,
黎蕾
,蔡传涛,刘贵周

中国生态农业学报 , 2010,
Abstract: A potted experiment was conducted to study the growth and biomass of Rauvolfia vomitoria plant under different light intensities (15%, 40% and 70% of full sunlight) and nitrogen levels (15 g, 30 g and 60 g per plant). The results show that the growth, individual biomass and biomass allocation are significantly influenced by light intensity and nitrogen level (P<0.05). The plant height, ground diameter, relative growth rate of height and ground diameter (RGRH, RGRD) and individual biomass under 70% light intensity are higher than those under 15% and 40% light intensity, and more biomass is allocated to underground plant part. The height, ground diameter, RGRH, RGRD and individual biomass decrease with increasing nitrogen level under 15% and 40% light intensity. Under 70% light intensity, R. vomitoria plant grows best and individual biomass reaches the highest value of 559.6 g at 30 g nitrogen per plant. At the same light intensity, root mass ratio (RMR) and root to shoot ratio (R/S) decrease with increasing nitrogen level. On the other hand, specific leaf area (SLA) and leaf mass ratio (LMR) are highest at 15% light intensity and 60 g nitrogen per plant. Analysis on individual biomass, RMR, R/S and growth characteristics including height, ground diameter, RGRH, RGRD reveals that 70% light intensity and 30 g nitrogen per plant combination yields the optimum condition for R. vomitoria plants.
Yield and Quality Variation in Two Varieties of Gastrodia elata Blume in Bionic Wild Cultivation at Different Altitudes
不同海拔两种天麻仿野生栽培下产量和品质变化

ZENG Yong,CAI Chuan-Tao,LIU Gui-Zhou,WEN Ping,
曾勇
,蔡传涛,刘贵周,文平

植物科学学报 , 2011,
Abstract: Gastrodia elata Blume is a rare species because of its value in Chinese traditional medicine and extensive exploitation.To improve the yield and quality of G.elata and to promote the development of the social economy in northwestern Guizhou Province,we carried out complete test design experiments to mimic sexual reproduction of wild G.elata to investigate the yield and quality of two varieties of G.elata planted at different altitudes,and to analyze their economic effectiveness.Within an altitude range of 1...
Variation patterns of Coptis teeta biomass and its major active compounds along an altitude gradient.
不同海拔云南黄连生物量和主要有效成分变化

ZHANG Ji,CAI Chuan-tao,CAI Zhi-quan,LIU Gui-zhou,LUO Yuan,YANG Zhi-xiong,
张霁
,蔡传涛,蔡志全,刘贵周,罗媛,杨志雄

应用生态学报 , 2008,
Abstract: 研究了不同海拔(2 100~2 700 m)下,野生和人工栽培云南黄连的生物量、主要有效成分含量及产量.结果表明:野生云南黄连根茎和根生物量沿海拔梯度呈上升趋势,但无显著性差异(P>0.05);人工栽培云南黄连根茎生物量平均值在海拔2 600 m和2 700 m处分别为87.5 kghm-2和97.0 kg·hm-2,显著高于海拔2 300 m处(34.8 kg·hm-2,P<0.05),且海拔2 300、2 600和2 700 m的人工栽培云南黄连根茎和根生物量均大于野生云南黄连,但无显著性差异(P>0.05).野生云南黄连的根茎和根生物量均与全株生物量呈显著正相关.野生云南黄连根茎和根小檗碱含量在海拔2 700 m处最高,分别为4.60%和1.93%; 根茎巴马汀和药根碱含量、根药根碱含量在海拔2 600~2 700 m处最高;根巴马汀含量在2 300 m处最高.人工云南黄连根茎和根小檗碱含量在海拔2 600 m处最高,分别为4.41%和1.90%; 根茎巴马汀含量,根小檗碱、巴马汀和药根碱含量在海拔2 600~2 700 m处最高;根茎药根碱含量在海拔2 300 m处最高.海拔2 600~2 700 m处野生云南黄连根茎和根中各有效成分产量显著高于海拔2 100和2 300 m处(P<0.05).野生云南黄连分株的根茎生物量、根生物量、叶生物量、总生物量、高度和冠幅沿海拔梯度呈先升后降趋势.增大种植密度和加强人工管理可以提高云南黄连生物量和主要有效成分产量.
Biomass and growth law of Alstonia scholaris under different patterns of agroforestry
不同混农林种植模式下糖胶树生物量与生长规律研究

LIU Gui-Zhou,CAI Chuan-Tao,LUO Yuan,LIU Bao,SUN Cheng-Xun,
刘贵周
,蔡传涛,罗媛,刘宝,孙成逊

中国生态农业学报 , 2008,
Abstract: 通过分析糖胶树在不同种植模式下的生长及生物量变化,探讨了糖胶树不同种植模式的效果.结果表明:在较高种植密度(株行距为4 m×6 m)条件下,不同种植坡向间糖胶树生长差异较大,而在低密度条件下,坡向对植株的生长影响不大;在一定种植密度范围内,阴坡的种植密度对糖胶树的生长影响不大,且阴坡条件不利于糖胶树的生长,而阳坡则较适宜;不同种植模式下的糖胶树单株生物量不同,荒坡纯种(2.717 kg)较糖胶树 茶叶种植模式(2.598 kg)以及糖胶树 咖啡模式(2.500 kg)高.移栽定植后9~11个月是糖胶树生长的最快阶段;用种子进行苗木繁殖的糖胶树,其单株总生物量为28.41 kg,是营养繁殖的3.21倍,在生产上大面积推广时宜采用糖胶树种子进行幼苗繁殖.
Design and Implementation of Customized Multimedia Processing Platform Product
多媒体统一处理平台产品化定制的设计与实现

ZHANG Gui-Zhou,YE Ming,
张桂周
,叶明

计算机系统应用 , 2010,
Abstract: This document describes the customized design and software implementation method of the multimedia processing platform based on IP MultiMedia open system. It introduces the tasks undertaken with the customized design method, focusing on how to customize products as required. The method has features like excellent design, being easy-to-use, and high practicability. It also provides guidance to the product customization in other fields of the computer industry.
A Prioritized Nested DRR Algorithm
具有优先服务机制的嵌套式DRR算法

Jian Gui-zhou,Ge Ning,Feng Chong-xi,
简贵胄
,葛宁,冯重熙

电子与信息学报 , 2005,
Abstract: As DRR fails to provide strong latency bound, in this paper, a new scheduling discipline named Prioritized Nested DRR (PNDRR) is presented, which introduces a token bucket with virtual allocated token quantum and changes the entering order of the scheduling list for the latency-critical flow. By using the scheme for the latency critical flow, delay of packet in latency critical queue is effectively diminished. In this paper, theoretical analyses prove that PN DRR results in a significant improvement in the latency bound of delay-sensitive traffic in comparison to nested DRR(NDRR) while preserves the good properties as the same relative fairness bound and the per-packet complexity of 0(1) as NDRR. Simulation results also support analysis.
Effect on Self-similar Characteristics of the Leak-Bucket Output Traffic
漏桶算法对输出业务流自相似特性的影响

Jian Gui-zhou,Ge Ning,Feng Chong-xi,
简贵胄
,葛宁,冯重熙

电子与信息学报 , 2004,
Abstract: In this paper, the effect on shaping of self-similar traffic is investigated through leaky bucket. Analysis and simulation show that the self-similar character of output traffic of the leaky bucket will be increased for long-range dependence traffic in heavy load condition because of the storage procedure. Furthermore, the heavier the short dependence traffic through the leak-bucket, the worse the performance of the network. Therefore, the storage procedure would be a rational explanation for the generation of the traffic self-similar characteristics.
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