查询词典 acid-base

In connection with the character of Boc L-Glutamic Acid and aminoacetic acid structures, the reaction of aminoacetic acid acylated via Boc Anhydride has been studied on the condition of CH3OH in the paper. The yield of the derivatives is characterized by the melting point, the content of carboxylgroup and the product purity. The results showed that the best experiment condition is followed.

本论文以甲醇作为均相反应介质，Boc酸酐与谷氨酸为原料，在碱性条件下，以产物的熔点，羧基含量以及产物纯度作为产物质量确定的指标，最终得出N-Boc-谷氨酸的合成最优条件。

The substance with a molecular weight of 6.28kDa has very strong cation character determined by the electrophoresis of diaphragm wafer of fiber of acetic acid. The substance with antibacteria action obtained from forest frog is made up of alanine,aminoacetic acid,leucine,Isoleucine,Proline,aminoglutaric acid,threonine,Serine,lysine.

纯化林蛙皮肤中的抗菌活性物质经醋酸纤维薄膜电泳，表明其具有较强的阳离子特征；经氨基酸分析，表明林蛙皮肤抗菌活性物质是由丙氨酸、甘氨酸、亮氨酸、异亮氨酸、脯氨酸、中国林蛙皮肤抗菌肽的分离纯化和鉴定一摘要谷氨酸、苏氨酸、丝氨酸、赖氨酸组成。

OBJECTIVE:To study the compatible stability of levofloxicin hydrochloride injection with five kinds of homostatic(etamsylate, tranexamic acid , aminocaproic acid , aminome thylbenzoic acid , hemocoagulaser).

目的 ：研究盐酸左氧氟沙星注射液与五种止血药(酚磺乙胺、氨甲环酸、氨基己酸、氨甲苯酸注射液和注射用蛇毒血凝酶)配伍的稳定性。

Nonaqueous titration;Aminocaproic acid;Hydrochloride;Hyperehloric acid-acetic acid;Potentiometric titration

非水滴定；6-氨基己酸；6-氨基己酸盐酸盐；冰乙酸-高氯酸；电位滴定

The results showed that the red pigment belonged to anthocyanidin, it was soluble in water, stable against heat treatment, light, acid and sugar concentration, tolerant to reduction, but sensitive to alkaline, oxidation and Fe(superscript 3+). The research also showed that acid medium is favorable for extraction. The pigments have more general stability in acid medium and have high ufility value.

结果表明：该色素为水溶性多酚类花色素，在不同的pH环境下显示不同的颜色；其耐热性、耐光性、耐酸、耐糖、耐还原性较好，但耐氧化性、耐碱性较差；Fe(上标 3+)对色素有破坏性；该色素的提取宜在酸性介质中进行，酸性条件下其综合稳定性较优，有较高的利用价值。

The results showed that the red pigment belonged to anthocyanidin,it was soluble in water,stable against heat treatment,light,acid and sugar concentration,tolerant to reduction,but sensitive to alkaline,oxidation and Fe~(3+). The research also showed that acid medium is favorable for extraction.The pigments have more general stability in acid medium and have high ufility value.

结果表明：该色素为水溶性多酚类花色素，在不同的pH环境下显示不同的颜色；其耐热性、耐光性、耐酸、耐糖、耐还原性较好，但耐氧化性、耐碱性较差；Fe3+对色素有破坏性；该色素的提取宜在酸性介质中进行，酸性条件下其综合稳定性较优，有较高的利用价值。

In medium of mixed sulphuric acid and phosphoric acid, with N-phenylated anthranilic acid as a tracer agent, the standard solution of ammonium ferrous sulphate is used to titrate chromium.

试样以硝酸、氢氟酸溶解，加高氯酸冒烟驱除硅和氟，并将铬氧化为六价，在硫磷混合酸介质中，以N-苯代邻氨基苯甲酸为指示剂，用硫酸亚铁铵标准溶液滴定铬。

For the influence on linoleic acid, linolenic acid and arachidonic acid, the significance differed among various types.

对亚油酸、亚麻酸、花生烯酸的影响因品种而显著程度不同。

Aristolochic acid is the main component of Aristolochia plants. It is a mixture of aristolochic acid Ⅰ and aristolochic acid Ⅱ. It has been proved by several researches that AA has nephrotoxicity and tumor toxicity. However, the pharmacokinetics of AA is still limited.

马兜铃酸是马兜铃科植物的主成分，为马兜铃酸Ⅰ及马兜铃Ⅱ所构成的混合物，研究指出AA具有肾毒性及肿瘤毒性，但对於AA在药物动力学方面的研究报告则是相当有限。

Aristolochic acid is the main component of Aristolochia plants. It is a mixture of aristolochic acid Ⅰ and aristolochic acid Ⅱ. It has been proved by several researches that AA has nephrotoxicity and tumor toxicity. However, the pharmacokinetics of AA is still limited.

中文摘要马兜铃酸是马兜铃科植物的主成分，为马兜铃酸Ⅰ及马兜铃Ⅱ所构成的混合物，研究指出AA具有肾毒性及肿瘤毒性，但对於AA在药物动力学方面的研究报告则是相当有限。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。