查询词典 acid-carbonate

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%。

Diammonium phosphate,NKP compound fertilizer,granular superphosphate,titanium dioxide,sodium silicofluoride,potassium silicofluoride,phenyl Peri acid,Peri acid,Laurent's acid,antioxidant,pyrite.

提供产品：磷酸二铵、NPK复合肥、造粒磷肥、钛白粉、氟硅酸钠、氟硅酸钾、苯基周位酸、周位酸、劳伦酸、橡胶防老剂、硫铁矿。

The yield of conversion and reaction rate were investigated under different reaction temperature, reactant ratio and catalyst amount through conditional experiment, and best conditions were confirmed, which was 75℃, the ratio of 1:4 for binary acid to ethanol and the amount of silicotungstic acid was 2% of mixing binary acid quality.

通过条件试验，分别考察了在不同的温度、投料比、催化剂用量情况下酯化反应的转化率和反应速率，最终确定了该反应的最佳反应条件：温度75℃，酸醇比为1：4，催化剂用量为混合二元酸质量的2%。

The results show high selectivity when the temperature is controlled at 50 CC , and the nitrated reaction time is 90 mm, toluene is nitrated by using 95% nitric acid as nitrating reagent at the presence of acetic anhydride, 1.0g silicotungstic acid catalyst is calcinated at 300℃ for 1.5h. The o/p (ratio of ortho to paro isomer of toluene nitration) ratio is 0.89 in product distribution of toluene nitration, lower than 1.67 using sulfonitric acid as catalyst. The yield of products is 91.6%.

结果表明，在醋酐存在条件下，以CCl4为溶剂，以质量分数为95%的硝酸为硝化剂，反应温度控制在50℃，反应60 min， 1.0g经300℃焙烧1.5h后的硅钨酸催化剂，对甲苯表现出强的区城选择性，甲苯硝化产物o/p值（甲苯硝化产物邻位和对位异构体的质量比）达0.89，较硝硫混酸的1.67显著降低，产物收率达到91.6%。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。