查询词典 pa

Headquartered in Pittsburgh, PA, Horsehead employs approximately 800 people and has seven facilities throughout the US Visit for more information.

总部设在宾夕法尼亚州匹兹堡，马头雇用约800人，并有7个设施，在美国各地访问他们的网站以获取更多信息。

The new finding of this research is that PA has a regulative effect on the expression of C-myc, P16 and Hox genes.

苯乙酸对C-myc，p16，HOX基因表达调节作用，是本研究的新发现。

The Specification is applicable for construction and acceptance of hypertoxic and combustible medium steel piping engineering with design pressure of 400Pa ~42MPa and design temperature of -196℃~850℃.

本规范适用于设计压力 400 Pa~42MPa，设计温度-196℃~850℃的有毒，可燃介质钢制管道工程的施工及验收。

The hard and insolvable white particle s formed in the brine were composed of protein, which was not decomposed completely, and the tyrosine dissociated in the pa.

通过对白色物质的分析研究发现，这些白色物质的主要成分是酪氨酸和面筋蛋白，是由于面粉中的一些蛋白质未被彻底分解而与酱体中的部分游离氨基酸混合粘附于黄豆的表面，在盐水浸泡下形成较&硬&、难溶解的白点

It is shown that the generation of the PA effect results from two kinds of contribution only. One is the contribution of so called"thermal piston"--the gas boundary layer adjoining the heated sample which expands cyclically and pushes the rest gas just like piston. The compressing process of it is comfirmed to be isochoric. And the other is that of"mechanical piston"--the thermally expansive sample itself, the compressing process of which is found to be polytropic with a index of (2-〓).

一即是被称为&热活塞&的与材料受热表面相邻的边界层气体周期性热膨胀产生的压缩，其是定容过程；另一是被称为&机械活塞&的材料本身热膨胀产生的压缩，其是多变过程，多变指数为2-〓，γ为绝热压缩因子。

In this study, poly (PA12T), poly (PA12I) and PA(12T-co -121) were synthesized using terephthalic acid, isophthalic acid with dodecamethylene diamines.

中和成盐的过程中，十二碳二元胺可分别与对苯二甲酸、间苯二甲酸直接进行成盐反应，可以通过电导滴定法来判定等当量点。

Dodecamethlyene diammonium terephthalate(PA12T salt) and dodecamethlyene diammonium isophthalate(PA12I salt) can be prepared by using terephthalic acid or isophthalic acid with dodecamethylene diamines in ethanol solution, respectively.

通过 对PA 1 ZT、PA12I及其共聚物的聚合反应的研究发现，随着PA121组分的增加，相同反应条件下，产物的粘数呈增大趋势，熔点逐步降低，透明性逐渐增大，韧性增强。4。

mitochondrial dnais the only inheritant substance except for the nuclear dna in a euˉkaryon cell,which is related to the oxidative phosphorylation of a cell.mitochondrial dna is the important target of carcinogens and is vulnerable because of its structure and function.the mutation of mtdna could reduce the nomal respitation and release large quantities of ros,whichincrease the danger of cancer happening.so,mtdna has been thought to be involved in carcinogenesis and recently more and more studies in this aspect have comeout.in this paˉper,we review the researches for relationship among mtdna mutation and tumors in digestion system,woman system,head and neck,urinary systemand blood system.

线粒体dna（mitochondrial dna，mt dna）是真核细胞中唯一存在的独立于核dna之外的遗传物质，与细胞的氧化磷酸化功能密切相关。mtdna自身的结构和功能特点决定了它是致癌物作用的重要靶点，易受致癌因素的损伤而发生突变。mtdna的突变可削弱正常的呼吸功能，释放高水平的活性氧，进而增加肿瘤发生的危险性，所以mtdna被认为与肿瘤发生有密切关系。近年来，这方面的研究越来越多，本文现就mtdna突变与消化系统肿瘤、妇科肿瘤、头颈部肿瘤、泌尿系统肿瘤等实体瘤以及血液系统恶性肿瘤之间的关系作一简单的综述。

These products, In 1991, passed the provincial technical appraisals, in 1993, won the National Spark-Star Production Exhibition Golden Award and Golden Award of Ministry of Buikling Material Industry, P-brick has high cold crushing strength, good thermal shock resistance iow porosity, so as to be suitable for rotarykiln is burning zone transting zone, cooling zone, cooling machine and cement vertical kiln is high temperature zone, PA-brick has high cold crushing strength, good abrasion resisance, excellent slag corrosion resistance, low porosity etc, and suitable for rotary kiln is wicket, kilneye,cooling zone, cooling machine and cement vertical kiln is high tremperature zone etc.

该产品一九九一年通过省级技术鉴定，一九九三年荣获全国星火成果展览会金奖和建材部建材金奖。P砖具有常温耐压强度高、热震稳定性好、气孔率低等特点，适用于水泥回转窑窑口、窑尾和冷却带、冷却机及水泥立窑高温带等部位。

They are known collectively as Pa Kua, which is based on the 8 main directions of a compass.

他们跨海奇缘坝，主要是基于8方向指南针。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。