查询词典 acid

The proportion of essential amino acid, sapor amino acid and drug-effective amino acid in total amino acid are 40.3247%, 22.2439% and 77.5609% separately.

氨基酸分析显示黑麦草叶蛋白中人体必需氨基酸、鲜味氨基酸和药效氨基酸分别占总氨基酸的40.3247%、22.2439%和77.5609%。

By means of essencial amino acid index and animal growth experiments, using the amino acid composition of the muscle in black sea bream juvenile as standard EAA requirement model for fish feed, The effects of nine different formulae of feed protein sources were compared. The amino acid balance and the nutritional value of the protein sources in feed for the juvenile of black sea bream were studied. Two formulae of protein sources were selected to be most effective, It suggests EAAI be an effective and simple assessment standard in studies on valuation of amino acid balance in protein sources of fish feed.

以黑鲷劫鱼肌肉的氨基酸组成作为幼鱼饲料中必需氨基酸需要量的标准模式，通过必须氨基酸指数和生物饲养试验结果相结合，对黑鲷幼鱼的9种不同蛋白源配比的饲料进行了比较研究，对黑鲷幼鱼配合饲料中氨基酸平衡和蛋白质营养价值进行了评估，筛选出2个高效饲科蛋白源配方；表明EAAI是鱼用饲料蛋白质营养价值评估和氨基酸平衡研究的一种简便有效的评价指标。

The single mechanical seals of five PHP pumps, nine PLA pumps, two THD pumps and nine ZA pumps in the acetic acid plant were changed into dual mechanical seals based on not changing main parts such as casing, impeller, shaft, bearings house etc. to solve the leakage problems of flammable, explosive, poisonous, harmful substances, such as acetic acid, methyl iodide, hydroiodic acid, and propionic acid etc.

通过对醋酸装置中所选用的5台PHP型、9台PLA型、2台THD型及9台ZA型单级卧式脚支撑化工离心泵，在不改变泵壳、叶轮、轴、轴承箱等主要部件的基础上，将原来的单端面机械密封改造为双端面机械密封或串联式机械密封，以此来防止所输送的易燃、易爆、有毒、有害高危介质（如醋酸、碘甲烷、碘化氢、丙酸等）外漏。

Mainly engaged in fine chemicals, chemical reagents precious metals, silver nitrate, the acid chloride, potassium cyanide-gold, Sulfite the salt, molecular Silver, silver, industrial ethanol, chemical reagents sulfuric acid, hydrochloric acid, nitric acid, ethanol and 95 percent ethanol and chemical reagents and other electronic products research and production.

主要从事精细化工，贵金属化学试剂，硝酸银，氯金酸，氰化亚金钾，亚硫酸金盐，分子银浆，银粉，工业无水乙醇，化学试剂硫酸，盐酸，硝酸，无水乙醇，95%乙醇等电子和化学试剂产品研究与生产。

The results showed that 3% to 5% propionic acid solution had better preservative action by soaking the sorosis for three minutes under normal atmospheric temperature;and 0.5% propionic acid,potassium sorbic acid and sodium benzoic acid solution all had better preservative action under low temperature of 5℃ to 8℃.

结果表明，在常温下，3～ 5 %的丙酸溶液浸果 3 min具有较好的防腐作用；在 5～ 8℃的低温条件下，0 。5 %浓度的丙酸、山梨酸钾和苯甲酸钠浸果 2 min均能达到较好的防腐效果。

For many years, the company has been devoting to the spectacled production of citric acid and sulfuric acid, has cultivated a group of high-level professional and technical staffs and founded several well-equipped production line of citric acid and sulfuric acid.

多年来，公司一直致力于柠檬酸和硫酸的专业化生产，缔造了一批高水平的专业技术人员以及数条装备精良的柠檬酸和硫酸生产线；年产柠檬酸和柠檬酸系列产品6万吨、硫酸系列产品20余万吨。

The sample was dissolved by hydrofluoric acid and hydrogen nitrate, then the tantalite and hydrofluoric acid formed TaF6- in the media of tartaric acid－hydrofluoric acid.

试样以氢氟酸、硝酸溶解后，在酒石酸－氢氟酸介质中，钽酸与氢氟酸形成阴离子TaF6-，与结晶紫生成蓝紫色的络合物，用苯萃取出来采用光度法测定钽量，测定结果均在国标允许误差范围内。

Products: 3 - benzoyl-ethyl acrylate (97% min), acyl phosphorus acid methyl ester (98% min), P acyl three ethyl acetate (98% min), a phosphorus acid acyl The ethyl esters (98% min), 3 - bromine -1,3,4,5 - tetrahydrocannabinol -2 H-1-benzo-Aza Zhuo -2, 1 - naphthalene-tetrahydrocannabinol (98% min), 3,5 - dimethyl benzoyl chloride (99% min), 3,5 - dichloro benzoyl chloride (97% min), the ethyl benzoyl chloride (99% min), a TCA Ester (99.5% min), o-benzoyl methyl benzene (99% min), 4 - phenyl benzophenone (99% min): glacial acetic acid (99% min), methanol (99% min), liquid chlorine (99.5% min), caustic soda (30% min), isopropyl alcohol (99% min), anthranilic acid (99% min), dichloroethane (99% min ), Chunben (99% min), toluene 99% min

3-苯甲酰基丙烯酸乙酯（97%min）、磷酰基乙酸三甲酯（98%min）、磷酰基乙酸三乙酯（98%min）、磷酰基乙酸甲酯二乙酯（98%min）、3-溴-1，3，4，5-四氢-2H-1-苯并氮杂卓-2酮、1-四氢萘酮（98%min）、3，5-二甲基苯甲酰氯（99%min）、3，5-二氯苯甲酰氯（97%min）、对乙基苯甲酰氯（99%min）、氯乙酸甲酯（99.5%min）、邻苯甲酰基苯甲酸甲酯（99%min）、4-苯基二苯甲酮

The citric acid-producing strain Aspergillus niger 2363-2, was isolated and used in our research. The fermentation conditions were optimized as follows: sucrose as carbon source 8. 0-14. 0%, ammonium chloride as nitrogen source 3. 0-4. 0g/l, initial pH 2. 0, and cultural temperature 30℃. The influential factors of formation of spores were also studied, and a series of measures were taken to restrain the spore formation on the basis of our experimental results. With the consideration of the cultural environment and microbial cell itself, the factors affecting the duration of citric acid-producing activity of microbial cells were examined, and it is found that undissociated citric acid and the ageing of microbial cells are the main factors. The experimental results also show that partial replacement of fermentation broth can lengthen the duration of citric acid -producing acitivity of microbial cells.

筛选出了用于试验研究的柠檬酸发酵用菌Aspergillus niger 2363-2，确定了其最适发酵条件—碳源选用蔗糖，浓度8.0~14.0%，氮源为NH〓Cl，浓度3.0~4.0g/l，发酵初始pH值为2.0，培养温度30℃；讨论了分生孢子产生的影响因素，并通过试验提出了抑制分生孢子产生的措施；从分析微生物所处的环境和微生物本身两个方面出发，探讨了影响微生物菌体产酸活性持久性的因素，认为分子态柠檬酸和菌体本身的老化是影响微生物产酸活性持久性的两个主要因素，并提出采用部分置换发酵液发酵能延长微生物菌体的产酸活性。

The Surface composition of grafted PET fiber was characterized by ATR-FTIR. THE results showed that there were no obvious differences between ungrafted and graft PET fiber in the spectra ,except that the typical peak of-OH in 3100cm~(-1) appeared in both Citric acid treated PET fiber and Acrylic acid treated PET fiber indicated citric acid and acrylic acid had been successfully grafted on the surface of PET fiber.

对样品的接枝效果进行红外光谱表征，发现无论是经过丙烯酸接枝处理，还是柠檬酸接枝处理，处理前后纤维的红外吸收光谱图都没有明显的区别，说明接枝前后纤维的主体性质没变，但是，二者在3100cm~(-1)处都出现了羟基的特征吸收峰，说明柠檬酸和丙烯酸都已经接枝上了PET纤维表面。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。