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A theoretical study of the mechanism of the nucleotidyl transfer reaction catalyzed by yeast RNA pol
The mechanism of the nucleotidyl transfer reaction catalyzed by yeast RNA polymerase II has been investigated using mole......
Tangjiashan Barrier Lake is one of the largest barrier lakes caused by the Wenchuan Earthquake. Its risk analysis, emerg......
Both physical and chemical processes affect the fate and transport of herbicides. It is useful to simulate these process......
Degradation mechanism of two-dimensional electron gas density in high Al-content AlGaN/GaN heterostr
This paper finds that the two-dimensional electron gas density in high Al-content AlGaN/GaN heterostructures exhibits an......
A high power X-band hybrid microwave integrated voltage controlled oscillator(VCO) based on Al-GaN /GaN HEMT is presente......
The 4H-SiC junction barrier Schottky(JBS) diodes terminated by field guard rings and offset field plate are designed,fab......
目的:探讨支持、技巧、自信(3S)理念健康教育模式对桂西地区农村初产妇母乳喂养的影响.方法:将168例桂西地区农村初产妇随机分为实......
目的探索胰岛素样生长因子-2(IGF2)/胰岛素样生长因子-1受体(IGF1R)/胰岛素受体底物-1(IRS1)信号通路在ErbB2阳性乳腺癌细胞对Herc......
The effects of Helicobacter pylori infection on hyperammonaemia and hepatic encephalopathy in cirrho
Objective To evaluate the relationship among Helicobacter pylori (Hp) infection, blood ammonia concentrations , and hepa......
Hydrological and climatological glaciers observation 20 years on Tanggula Pass of Tibetan Plateau: i
Two decades have passed since China and Japan jointly launched hydrological & climatological observations on the glacier......
Impaired gallbladder motility and delayed orocecal transit contribute to pigment gallstone and bilia
AIM:Gallbladder and gastrointestinal motility defects existin gallstones patients and to a lesser extent in pigmentgall......
This paper presents the Ye Deming’s GoldNeedle techniques. Ye’s gold needle has a longhistory, the manipulation is di......
The sloshing flows in a LNG cargo tank model(1/50 scale) of a ship are measured by an embedded panoramicPIV system.The m......
In this paper,the reaction mechanism of methane oxidation undermilder condition of nonequilibrium plasma was reported.
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The influence of dissolved oxygen content on the oxidative stability of a linked polymer solution(LPS) was studied by mi......
As a rising market,however,it’s in urgent need to improve its mechanism to better cope with global financial fluctuatio......
Gallium atoms have been introduced into the framework of Y zeolite by treating the zeolite with an aqueous solution of a......
S concentrations in samples of mulberry leaves and silkworm (Bombyx mori L.) cocoon shells and quality of cocoon taken f......
With deep sea petroleum explorations become more and more popular,some geological phenomena have emerged:extension of lo......
Time-domain Spectral Finite Element Method for Wave Propagation Analysis in Structures with Breathin
Guided waves are generally considered as a powerful approach for crack detection in structures,which are commonly invest......
European businesses remain confident about China, but call for more action to maintain growth.
European businesses rema......
AS China’s second largest in terms ointernational tradeQingdao Port hasachieved growth against a backdrop of shrinking ......
,A novel high-voltage light punch-through carrier stored trench bipolar transistor with buried p-lay
...
目的制备1种99Tcm标记雌激素受体(ER)显像剂，通过体外细胞实验和在体荷瘤动物显像评价其与ER的结合特性。方法以雌酮为原材料合成ED......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
目的 探讨葡萄糖转运蛋白1(glucose transporter 1,Glut-1)及其mRNA在正常乳腺组织、乳腺纤维腺病、乳腺纤维腺瘤和乳腺癌中的表达......
目的 探讨组织形态上易混淆的浸润性导管癌(IDC)与浸润性小叶癌(ILC)的鉴别诊断方法 .方法 收集北京大学第一医院1998年1月至2001......
目的：分析全数字化乳腺摄影技术（D R）在乳腺癌诊断中的应用价值。方法：选取我院2014年12月2015年12月接诊的224例乳腺癌患者为研究对象......
目的：观察和分析免疫强化营养治疗对早产极低出生体质量儿（VLBWI）预后的影响。方法选取106例早产 VLBWI 作为研究对象，将其随机分为观......
【目的】观察补阳还五汤对曲妥珠单抗导致的心肌细胞H9C2活性抑制及SHP-1活性的影响,通过转染SHP-1和SHPC/S-1质粒后观察补阳还五......
【目的】探讨细胞DNA定量分析技术在乳腺导管非典型增生与癌变鉴别中的诊断价值。【方法】收集正常乳腺组织30例（Ⅰ组），乳腺导管轻中......
目的探究情景教学法与案例分析法在乳腺内科实习护士带教中的效果。方法选取2018年6月—2019年12月于该院乳腺内科进行实习的52名......
分析小样浆纱机对实际生产的模拟程度。以断裂强力、断裂伸长率、3mm毛羽数和耐磨次数为检验指标，将GA391型小样浆纱机上所浆纱线与......
千百年来,中国传统民族声乐理论经过历代声乐家和声乐理论家们孜孜不倦地探索和实践,已经逐步形成了较科学的理论体系.这些理论从......
ＰＲＯＤＵＣＴＩＯＮＡＮＤＡＰＰＬＩＣＡＴＩＯＮＯＦＭＯＵＳＥＡＮＴＩＳＥＲＵＭＴＯＨＵＭＡＮＥＳＴＲＯＧＥＮＲＥＣＥＰＴＯＲＳＺｈａｎｇＬｅｉ张蕾；ＳｕｎＳｕｌｉａｎ孙素莲；ＨｅＬｕｏｗｅｎ何洛文（ＤｅｐａｒｔｍｅｎｔｏｆＩｍｍｕｎｏｌｏｇｙ，Ｂｅ.........
目的：吸烟对大脑中动脉（MCA）血流速度及搏动指数（PI）的影响。方法：入住神经内科的男性患者60例,根据吸烟情况分为吸烟组（n=30）和对照组（不吸......
设计的启发式算法从图的合并操作出发，降低了计算复杂度，从应用效果看接近最优的程度也较以往算法好。......
采用多种方法对酒钢72A钢中非金属夹杂物进行了调查，对夹杂物的类型，来源，数量及尺寸进行了讨论，实验证明，铸坯中夹杂物有60%外来杂夹物......
卡尔曼(Kalman)滤波为线性最优递推滤波算法,但鲁棒性差,无法实时精确跟踪系统突变状态。为此,设计了一款双渐消因子调节的自适应K......
探讨T2．81texS捻纱的纺制工艺。针对原料特性，前纺工序减少纤维损伤，优选各类针布并严格控制车间温湿度，优化工艺配置减少堵缠现象，解决......
采用高压均质机破碎啤酒酵母细胞壁提取细胞质中RNA，酵母浓度、工作压力及循环次数对细胞破壁率有影响，当酵母干物质浓度为15%，压力为......
目的：探究化痰散结方对乳腺癌MCF-7/ADM移植瘤的逆转耐药机制。方法制备荷瘤小鼠模型；设立生理盐水空白对照组、阿霉素组、阿霉素＋维......
目的:探讨超声引导微创旋切术对乳腺肿瘤患者手术效果和生活质量影响。方法:选取2018年3月至2020年4月我院收治的乳腺肿瘤患者188......
Particle breakage continuously changes the grading of granular materials and has a significant effect on their mechanica......
我国社会主义建设每一新局面的开创，无不建立在邓小平对我国社会主义建设重大问题的回答和根本性突破的基础之上。对社会主义的本质......
研究了两种具有埋界面漏的槽型技术（Trench）功率金属氧化层半导体场效晶体管（MOSFET）。利用埋于整个界面的漏n’层缩短开态时载流子在......
数控机床的参考点,是相对于机床零点设置的一个固定位置,是联系机床坐标系和工件坐标系的关系点,机床每次起动后,首先要使机床回归......
2020年3月12日河北省怀来地震台伸缩仪、水管仪、垂直摆和水平摆同步出现快速转折破年变的变化,针对这些异常,从观测和供电系统、......
目的：探讨彩色多普勒超声与弹性成像在乳腺恶性肿瘤中的诊断意义，为临床提供指导和帮助。方法回顾性分析我院2011年9月～2014年9月收治......
“互联网＋”正逐渐渗透到社会的各个领域，面对“互联网＋”各行各业机遇与挑战并存。在“互联网＋教育”的背景下，康巴藏区基础教育呈现出......
