查询词典 acid-base

Fast dissolution of dissoluble calcium from bovine bone treated by high intensity pulsed electric fields was investigated, in which the admixture of citric acid and malic acid was used as the mixed acid.

以柠檬酸和苹果酸的复合物作为混合酸，采用高电压脉冲电场技术对牛骨中钙盐的溶出进行了研究。

The new process for preparing 4,4"-Diaminostilbene-2,2"-disulfonic acid was characterized by carrying out the catalytic hydrogenation of 4,4"-dinitrostilbene-2,2"-disulfonic acid or its alkali salts in presence of both Pd/C and OVN in water, the amount of OVN ranging from 0.1 to 0.2% by weight of 4,4"-dinitrostilbene-2,2"-disulfonic acid or its alkali salts, yielding 98.7% of desired product with 99.3% purity.

确定了氧化缩合反应的较佳工艺条件，DNS收率达95.2％，纯度达到了99.1％。而在本论文所确定的还原反应最佳条件下，DSD酸的收率可达98.7％，纯度高达99.5％。

The results suggest that there are significant fatty acid and amino acid metabolism changes in NASH. Excessive fatty acids accumulation in hepatic cells、ω-6/ω-3 ratio imbalance, dodecanoic acid decreased, and some amino acids contents changes are related to hepatic inflammation and injury.

结果提示NASH大鼠肝组织存在明显的脂肪酸谱和氨基酸谱变化，肝细胞内各类脂肪酸聚积、ω-6：ω-3PUFAs比率失衡、正十二烷酸降低以及某些氨基酸含量变化等可能对脂肪肝炎症发生、肝损伤有重要作用。

Gas Chromatography;Relative Density;alpha-Chloro reaction;dodecanoic acid;alpha-chlorododecanoic acid;fatty acid

本文建立的气相色谱-相对密度耦合法，有利于在线监控脂肪酸的α-氯代反应深度。

The main volatile chemical components were n-hexadecanoic acid (24.03%), dodecanoic acid (6.20%) tetradecanoic acid (6.44%), 6, 10, 14-trimethyl-2-pentadecanone (4.03%), nonanal (4.54%), anthracene (4.26%), benzeneacetaldehyde (4.25%).

主要成分有：正十六酸(24.03)%、十四酸(6.44%)、6，10，14-三甲基－2-十五烷酮(4.30%)、壬醛(4.54%)、蒽(4.26%)、苯乙醛(4.25%)。

High-sulfur hot spring water in ancient description: hot spring water from 2500 meters underground granite, dolomitic limestone and gneiss crust between the ancient hot springs, hot spring water has been formed last million years, year-round water temperature of 50-60 ℃, a liter water the sulfur content of more than 2 mg in the rich oxygen, silicon, aluminum, iron, calcium a variety of ancient trace mineral elements, PH value of 7 are weak acid, such as lactic acid in yogurt not only offer intestinal alkaline substances in the change into a weak acid substances, but also have anti-bacterial material substances, inhibition of intestinal bacteria breeding corruption and activities, thereby reducing the intestinal harmful substances on human health has a very good role.

高硫磺远古温泉水质介绍：温泉水来自地下2500米花岗岩、白云质灰岩和片麻岩之间的地壳温泉，温泉水已经形成上亿年，又称&远古温泉&，常年水温50-60℃，每升水中的硫磺含量在2毫克以上，富含氧，硅，铝，铁，钙等多种远古微量矿物元素，PH值7属于弱酸性，如酸奶中的乳酸不但能使肠道里的弱碱性物质转变成弱酸性物质，而且还能产生抗菌物物质，抑制肠道中的腐败菌的繁殖和活动，从而减少肠道内的有害物质，对人体具有非常好的保健作用。

objectiveto determine the content of the tritepenoidic acid in dracocephalum moldavica l .methodswith oleanolic acid as the standard,5% vanillin-acetic acid and perchloric as the developer,colorimetric method was applied.

目的测定香青兰全草中总三萜酸成分含量。方法以齐墩果酸为指标，采用香草醛-冰醋酸及高氯酸显色后用分光光度法测其含量。

Elaeis GuileensisAcid Elaeis Guileensis Kernel Acid, Palm Fatty Acid and Palm Kernel Fatty Acid

棕榈脂肪酸。功能：提炼自棕榈果核，具柔软肌肤特性，亦可做为清洁剂。

Experiments show that water solution contained 0. 5 -1 % sodium sulfate and 1 - 2% acetic acid is treated by means of electrodialyzer of 200 × 400mm assembled with tri - membrances and 19% sodium sulfate and 20% acetic acid are recovered by concentrating and separating. The content of salt and acid in the purified water is less than 0. 01%, current efficiency greater than 85 %, flow length in 3 ~ 5m and power consumption about 40 ~ 50 kwh/t.

实验表明，含0.5～1％硫酸钠、1～2％乙酸的水溶液通过三对膜组装的200×400mm电渗析器，分别得到含19％硫酸钠、20％乙酸的浓缩液，外排水中盐和酸的含量小于0.01％，电流效率大于85％，流程长度3～5m，耗电量40～50kwh／t。

Complete acid hydrolysis of the peptide followed by amino acid analysis yielded equimolar amounts of Leu, Orn, Phe, Pro, and Val. Orn is ornithine, an amino acid not present in proteins but present in some peptides .

此肽完全水解，然后经氨基酸分析产生等摩尔的Leu，Orn，Phe，Pro和Val，Orn为鸟氨酸，是蛋白质中不存在而存在于某些肽中的一种氨基酸。

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。