查询词典 acid-base

Besides the introduction of concept about pyroligneous acid,the field of application,the key point is to expounding utilization status of pyroligneous acid in vegetable,crops,edible mushroom,livestock and poultry.,aimed at extending and study of pyroligneous acid in agricultural production.

本文除介绍木醋液的概念、应用领域及发展历史外，重点阐述了木醋液在蔬菜、大田作物、食用菌和畜禽上的应用现状，旨在推动木醋液在农业生产上的推广应用和研究。

When BMSCs proliferated to enough cell number (7×106). 500 000 cells were centrifuged to a pellet and cultured in chondrogenic medium supplemented with DMEM high-glucose, insulin, transferring, selectin, pyroracemic acid, 2-pyrrolidine carboxylic acid, BSA, dexamethasone and ascorbic acid for 6 weeks.

当培养的骨髓基质干细胞达到7×106个细胞时，将每500 000个细胞离心制成高密度细胞微球，在含有DMEM高糖、胰岛素、转铁蛋白、选择素、丙酮酸、脯氨酸、 BSA、地塞米松、抗坏血酸的促软骨细胞分化培养液培养6周。

When BMSCs proliferated to enough cell number (7×10^6). 500 000 cells were centrifuged to a pellet and cultured in chondrogenie medium supplemented with DMEM high-glucose, insulin, transferring, selectin, pyroracemic acid, 2-pyrrolidine carboxylic acid, BSA, dexamethasone and ascorbic acid for 6 weeks.

当培养的骨髓基质干细胞达到7×10^6个细胞时，将每500000个细胞离心制成高密度细胞微球，在含有DMEM高糖、胰岛素、转铁蛋白、选择素、丙酮酸、脯氨酸、BSA、地塞米松、抗坏血酸的促软骨细胞分化培养液培养6周。

The determination of quercitin was performed on Century SIL C18 BDS (250 mm×4.6 mm, 5μm) column, using methanol-water-phosphoric acid (V:V:V=60.00:40.00:0.02) as mobile phase at a flow rate of 0.8mLmin^(-1) and UV detection at 360 nm. The determination of gallic acid was performed on Century SIL C18 BDS (250 mm×4.6 mm, 5μm) column, using acetonitrile-water-phosphoric acid (V:V:V=5.00:95.00:0.02) as mobile phase at a flow rate of 0.8mLmin^(-1) and UV detection at 272 nm.

槲皮素的测定条件为：Century SIL C18， BDS(250.0mm×4.6mm， 5μm)色谱柱，流动相为甲醇－水－磷酸（体积比为60.00：40.00：0.02），流速为0.8mLmin^(-1)，检测波长为360nm；没食子酸的测定条件为：Century SIL C18 BDS (250.0mm×4.6mm， 5μm)色谱柱，流动相为乙腈－水－磷酸（体积比为5.00：95.00：0.02），流速为0.80mLmin^(-1)，检测波长为272nm。

DHCC Constance in the chemistry belongs to the onlighted Cyclopentanoperhydrophenanthrene when it reacted together with the acid Constance it could transform into the fluorescence phenol.we did the flouric determination for the DHCC, in which treated by the ethanol-sulfuric acid or acetic anhydride-methylene chloride-sulfuric acid, acquired standard curve in the 0-40μg/ml presented the liner relet...

DHCC类物质在化学上属于不发光的环戎烷多氢菲类，但与酸性物质一起反应时，可转化为产生荧光的酚类。用乙醇硫—酸或乙酸酐—二氯甲烷—硫酸处理后的DHCC进行荧光检测，获得标准曲线0—40μg/ml范围内呈线性关系，检出的最高灵敏度可达300ng/ml。该方法可用于分离后的DHCC及单一种DHCC代谢物的定性及定量分析。

A new method for synthesis of rosolic acid is introduced in this thesis: under solvent-free conditions, grinding the mixture containing phenol, oxalic acid and copper salt catalyst and then irradiated by MW to produce rosolic acid .

本文主要介绍了一种新的制取玫红酸的方法：在无溶剂的条件下，通过研磨将苯酚，草酸和催化剂混合均匀，再由微波作用，直接合成玫红酸。

RESULTS: 12 compounds were isolated and identified as aurantiamide acetate (1), aurantiamide benzoate (2), physcion (3), scopoletin (4), vanillin (5), coniferyl aldehyde (6), syringaldehyde (7), syringic acid (8), luteolin (9), apigenin (10), azelaic acid (11), dotriacontanic acid (12), respectively.

结果：从羊耳菊全草的氯仿和乙酸乙酯部分共分离得到12个化合物，分别鉴定为橙黄胡椒酰胺乙酸酯(1)，橙黄胡椒酰胺苯甲酸酯(2)，大黄素甲醚(3)，东莨菪亭(4)，香草醛(5)，松柏醛(6)，丁香醛(7)，丁香酸(8)，木犀草素(9)，芹菜素(10)，壬二酸(11)，三十二烷酸(12)。

In order to recycle extra caustic soda and increase purity of sebacic acid, the research work in this thesis includes: extra caustic soda recovery, purification of sebacic acid and determination of solubility of sebacic acid in water, ethanol, and ethanol aqueous solution.

但是，它的传统生产工艺中存在过量游离碱浪费，癸二酸产品纯度不高等问题。对此本文做了三方面的研究，包括改进癸二酸生产工艺回收过剩的游离碱；提纯癸二酸；测定癸二酸在乙醇、水、乙醇水溶液中溶解度。

It is known that because the shikimic acid formerly mainly used in drugs and so on tumor, sterilization, the market demand is not big, is engaged in the Japanese anise tree acid extraction the enterprise to be also very few, mainly concentrates in Xi'an, the company size is not generally big, moreover, the shikimic acid calculates the inferior product nearly in each company's product mix, is not in the dominant position.

据了解，由于莽草酸以往主要用于肿瘤、消炎等药品，市场需求不大，从事莽草酸提炼的企业也屈指可数，主要集中在西安，公司规模一般不大，而且，莽草酸几乎在每家公司的产品结构中都算次产品，不处于主导地位。

The acidity of HZSM-5 was due to the non-framework aluminum species, i.e., SiAl. The intensity of acid sites of HZSM-5 declined while the quantity of acid sites increased with dehydration temperature, with optimal intensity and quantity of acid sites and maximum toluene conversion of 28.2% at dehydration temperature of 400℃.

HZSM-5分子筛的酸性变化主要是由于非骨架铝物种SiAl的变化而引起，随着脱水温度的升高，HZSM-5分子筛酸中心的强度下降，但酸中心数量增加，当脱水温度为400℃时，HZSM-5分子筛的酸中心强度和数量达到最佳，甲苯转化率为28.2%。

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。