查询词典 acid-base

Rapeseed is one of the major oilseed crops over the world. High quality is the focus of rapeseed breeding in many countries, including decreasing the contents of erucic acid, glucosinolates, fiber and linolenic acid, and increasing the contents of oleic acid and protein.

油菜是世界上最主要的油料作物之一，目前各国都在大力发展优质油菜，主要表现在降低种子中的芥酸、硫苷、亚麻酸及纤维素含量，提高油酸和蛋白质含量。

Erucic acid was positively correlated with seed protein linolenic acid and arachidonic acid.

芥酸与种子蛋白质、亚麻酸、花生烯酸间均呈极显著正相关。

Copolyesters of sebacic/terephthalic acid series was synthesized by the condensation polymerization of sebacic acid and terephthalic acid with ethanediol and neopentyl glycol.

论文采用癸二酸、对苯二甲酸与乙二醇、新戊二醇进行缩聚反应，合成了癸二酸/对苯二甲酸系共聚酯。

It contains ethylic acid,organic acid,alcohol,sugar,mineral substances,vitamins and amino acid etc. And so it has a high nutritive value and a strong health function.

以柿子为原料，采用固液发酵法生产的柿子醋，含有醋酸、有机酸、醇、糖、矿物质、维生素和氨基酸等成分，营养价值高，保健作用强。

Total amino acid,essential amino acid and flavorous amino acid contents were 776.4,302.4,311.7 mg/g,respectively,for S.chuatsi and 812.9,317.9,324.9 mg/g for S.scherzeri.

从氨基酸组成来看，每g翘嘴鳜肌肉干样的氨基酸总量为776.4 mg，必需氨基酸总量为302.4 mg，4种呈味氨基酸的总量为311.7 mg；而每g斑鳜肌肉干重的3者含量分别为812.9，317.9，324.9 mg。

Sodium silicate cement has good mechanical strength, excellent acid resistance (except for fluohydric acid and pyrophosphoric acid) and cheap price, but high in factor of porosity and irresistible to alkali.

水玻璃胶泥具有良好的机械强度，优良的耐酸性能，价格便宜，但孔隙率较大，不耐碱类腐蚀。

The conclusion is drawn that if the content of fluosilicic acid in wet-process phosphoric acid is less than 0.19% or the content of dialuminium trioxide in wet-process phosphoric acid is less than 1.47%, the elctrolysis would go on wheels.

另外，本文探讨了湿法磷酸中单一杂质对电解的影响，并得出只要氟硅酸含量低于0.19%、Al2O3含量低于1.47%时，电解就能够顺利进行。

Polyaspartic acid is easily ring-opened to form polyaspartic acid derivatives with a side chain founctional group.The second component can be added into aspartic acid by copolymerization to improve polarity and crystallization of primary polymer,and can make primary polymer without reactive group functionalize.

聚天冬氨酸是近几年来在全球销量日增的绿色化学品，由于它具有类似蛋白质的酰胺键结构，是一种生物可降解材料[1-2]，最终可降解成水和二氧化碳，具有良好的生物相容性，对环境友好。

Catalytic Synthesis of Methyl Furoate by Peroxhydrogen and Sulphate Acid;2. Using hydrochloric acid as a cheap catalyst,perfume methyl furoate was synthesized from methanol and furoic acid prepared from furfural,and was characterized by GC,IR and 1H-NMR.

从糠醛出发，由制备的糠酸和甲醇反应，在盐酸催化下，合成了香料糠酸甲酯，并用IR、1HNMR、GC等进行了表征；探讨了包括高纯度糠酸的制备在内的反应影响因素，在醇酸物质的量之比为 5∶1、催化剂体积占甲醇体积 13。

The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature,pressure,H2 space velocity,space velocity of furoic acid and methol,ratio of H2 and furoic acid and so on.

以糠酸、甲醇、氢气为原料，采用连续流动固定床微反应器，Pd-Ni/γ-Al2O3为催化剂，使糠酸一步加氢甲酯化生成α-四氢糠酸甲酯。

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。