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Asymmetric dimethylarginine and monomethyl arginine are endogenously produced amino acids that inhibit all three isoforms of nitric oxide synthase.

点评：内皮一氧化氮以及一氧化氮合酶是目前门静脉高压症以及相关并发症的发病机制的研究热点之一，本文研究了抑制NOS的内源性氨基酸类化合物的清除酶—-二甲基精氨酸–二甲氨基水解酶，进一步的深入探究了这一发病机制，为今后治疗作用位点的选择、药物研发以及相关实验研究提供了一定的理论依据，个人认为该实验意义较大。

It was found that dimolybdate ion did not exist in the saturated aqueous solution and was transformed into heptamolybdate ion Mo7O24^6- as the predominant species and monomolybdate ion MoO4^2- as the secondary species.

提出了一种利用Raman光谱主要特征峰振动频率及其主、次特征峰强度之比值对二钼酸铵晶体饱和水溶液组分同时进行定性和半定量分析的新方法。

Methods:To observe the contents of total bilirubin and alanine aminotransferasein serum ,the contents of malondialdehyde , activity of superoxide dismutase , level of nitrogen monoxide in serum and liver tissue ,hepato-pathohistologic changes by CCl4,αnaphthalin fluorescein isothiocyanate inducing acute liver injury and icterus respectively in mice by po, the effects of sedum lineare thunb on the biochemical changes were analysed.

分别采用四氯化碳（CCl4）、α萘异硫氰酸酯一次性灌胃中毒致小鼠急性肝损伤及黄疸模型，测定血清谷丙转氨酶、总胆红素含量及血清、肝组织中丙二醛、超氧化物歧化酶、一氧化氮水平和观察肝组织病理变化，分析佛甲草对上述指标的影响。

In this paper, the researchers describe a technique in which nanowires of potassium niobate were synthesized in a special hot water solution and separated using ultrasound.

这些研究员在文章中阐述了一种技术，在这项技术中，铌酸钾纳米线被合成为特殊的热水溶液并利用超声波使其分离。

As a useful fluorinated product,hexafluoropropene trimers can be prepared from hexafluoropropene oligomerization by gas phase-and liquid phase-methods,and many fluorocarbon surfactants such as full-fluoride nonene oxygen benzene sodium can be derived from perfluorinated nonene.

六氟丙烯可通过气相和液相法进行聚合制得六氟丙烯三聚物，即全氟壬烯，全氟壬烯可以进一步衍生出如全氟壬烯氧基苯磺酸钠等多种氟碳表面活性剂，是一种比较有用的含氟产品。

Or white blood cell; a colorless blood corpuscle capable of ameboid movement, whose chief function is to protect the body against microorganisms causing disease and which may be classified in two main groups: granular (granulocytes: basophils, eosinophils, neutrophils) and nongranular(nongranulocytes: lymphocytes, monocytes).

或称白血球，为一能作变形运动的无色血细胞，其主要作用是保护机体抗御致病菌。它可以分为两大类：粒性（粒性白细胞：嗜碱粒细胞、嗜酸粒细胞、嗜中性粒细胞）和非粒性（非粒性白细胞：淋巴细胞、单核细胞）。

We conducted a prospectiveclinical trial on the effect of large- versus small-dose calciumsupplementation during citrate anticoagulated hemodialysis onionized calcium and intact parathyroid hormone.

我们进行了一项前瞻性临床实验，研究枸橼酸抗凝血透期间，大剂量或小剂量补钙对钙离子浓度和全血甲状旁腺激素的影响。

On such basis, a new porous structured heteropoly acid catalyst is obtained by salt-gel reaction, using tetraethyl orthosilicate as the silicon source.

在此基础上，以正硅酸乙酯为硅源，利用&盐—凝胶&法得到一种新型介孔结构的杂多酸催化剂。

Test solution of pyrogallic acid was prepared by adding formic acid as antionxidative stabilizer, thus the measuring instability due to the oxidability of pyrogallic acid was overcome.

研究了用紫外分光光度法测定焦性没食子酸含量的一种新方法。

The results showed that Yb~(3+)-sensitized Tm~(3+)-doped oxyhalide tellurite glasses can be used as a kind of potential host materials for upconversion blue lasers .

结果表明Yb3+敏化Tm3+掺杂氧卤碲酸盐玻璃是一种上转换蓝光激光器的潜在基质材料。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。