查询词典 oxalic

METHODS 3-methoxy-7α-methylestra-1,3,5(10)-trien-17β-ol was reducted with lithium and ammonia,then the intermediate was hydrolyzed in oxalic acid and reacted with malonic acid to get 3,3-dimethoxo-7α-methylestra-5(10)-en-17-ol(compound 4),which was oxidated by pyridium bichromate ,reacted with acetylene,and hydrolyzed in oxalic acid again to get the product tibolone.

方法以3-甲氧基-7α-甲基雌甾-1，3，5(10)-三烯-17β-羟基为起始原料经锂胺还原、草酸水解、缩酮化得3，3-二甲氧基-7α-甲基雌甾-5(10)-烯-17β-羟基(化合物4)，然后用温和的氧化剂重铬酸吡啶盐氧化、炔化、再水解得目的产物。

Taking 2% oxalic acid and 10% hydrochloric, mixture of 2% oxalic acid and 4% acetic acid as extraction agent, the content of vitamin C was determined by using iodometry.

方法］以2%草酸、10%盐酸以及2%草酸和4%醋酸的混合液作为提取试剂，对4种蔬菜中维生素C进行提取，并用碘量法测定蔬菜中维生素C的含量。

Many medical study found that oxalic acid in food absorption, the urinary excretion of oxalic acid also significantly increased.

许多医学研究发现，食物中的草酸吸收之后，尿液中的草酸排泄量也会明显上升。

Vegetable of the mustard family, better like the mouthfeel after the scald such as orchid, cauliflower passes on the west, they contain rich cellulose to be digested more easily also; Spinach, bamboo shoot, wild rice stem contain the vegetable with more oxalic acid best also scald, it is difficult to because oxalic acid is inside alvine path,be become with calcic union synthetic oxalic acid is calcic, disturb the human body absorption to calcium; The mustard such as rutabaga kind vegetable contains glucoside of sulfur acting grape, shui Chao, hydrolysis have a youthful look becomes volatile mustard oil, taste is better, and can promote digest absorb; Dust of can complete purify mixes the potherb scald such as purslane small bug, still can prevent allergy.

十字花科蔬菜，如西兰花。菜花等焯过后口感更好，它们含有丰富的纤维素也更轻易消化；菠菜。竹笋。茭白等含草酸较多的蔬菜也最好焯一下，因为草酸在肠道内与钙结合成难吸收的草酸钙，干扰人体对钙的吸收；大头菜等芥菜类的蔬菜含有硫代葡萄糖甙，水焯一下，水解后生成挥发性芥子油，味道更好，且能促进消化吸收；马齿苋等野菜焯一下能彻底去除尘土和小虫，还能防止过敏。

CO is used to produce formate,formic acid and oxalic acid by reacting with alkaline,in which the CO usually from coal vaporization is replaced by the CO from tail gas of yellow phosphorus production,by-reaction between thermal phosphoric acid and formate or oxalate to produce formic acid or oxalic acid,and by product dihydric phosphates.

提出用生产黄磷尾气中的CO与碱反应生产甲酸盐甲酸草酸，或利用热法磷酸和甲草酸盐反应生产甲酸草酸并副产磷酸二氢盐，继续加工可制得磷酸盐系列和碳一化工系列产品分析该磷化-碳一化工产业在节能减排降低投资与生产成本方面的优势，并简述了黄磷尾气杂质对产品质量的影响及尾气的净化方法

The glyoxalic acid and oxalic acid in electrosynthesis of glyoxalic acid from oxalic acid was determined by reversed-phase high performance liquid chromatography,this method is simple,low cost and high performance.

采用高效液相色谱法测定了草酸电合成乙醛酸中乙醛酸和草酸的含量，方法简便，成本低廉，效果良好。

In result, formic, acetic, methanesulfonic, oxalic, malonic, succinic and glutaric acids were detected notably. Formic, acetic and oxalic acids were the most abundant organic acids, and the sum of their concentrations averagely accounted for 89% of the total detected organic acids and 13% of the total anions, respectively.

结果表明，甲酸、乙酸、甲磺酸、乙二酸、丙二酸、丁二酸、戊二酸均有不同程度检出，一元有机酸中甲酸和乙酸在每场降水中均有检出；二元有机酸中，乙二酸和丁二酸检出率很高，其他有机酸检出率较低。

Average current efficiency is 85.06%, chemical yield is 94.01%, average bath voltage is≤4.5V, the concentration of glyoxalic acid is ≥40%, the concentration of oxalic acid is ≤2.5%, and no oxalic aldehyde in the product is present.

本论文通过优化工艺控制，确定了最佳工艺条件，使平均电流效率达85.06%，化学收率达94.01%，平均槽电压≤4.5V，产品中乙醛酸浓度≥40%，草酸≤2.5%，产品中无乙二醛，可以满足下游产品的质量要求。

It is not being obvious that the content of oxalic acid and malic get change during storing, the content of quinic acid and citric acid will rise slightly during storing.

Oxalic acid及Malic在储藏间变化不明显，Quinic acid及Citric acid含量在储藏期间稍稍上升。

Oxalic acid loading substantially stimulated soil P release from A1 horizon, showing a linear relationship; but its effect on B horizon soil was relatively negligible, especially at low oxalic acid concentrations mmol L^(-1. Oxalate solutions 0.5~20.0 mmol L^(-1 oxalic acid adjusted to pH 5.16 with 10.0 mmol L^(-1) NaOH had a much higher (1.51~2.98 times) soil-P-release effect than oxalic acid solution the same in oxalate concentration. Therefore, the mechanism of oxalic acid/oxalate triggering release of soil phosphorus is assumed to be dominated by ligand-exchange or complexing reactions of oxalate anionC2O(superscript 2- subscript 4 but not simply acid-dissolving effect. The effect of oxalate anion on soil phosphorus release was found to be somewhat cumulative, i.e. the amount of P released was primarily controlled by the cumulative oxalate loading rate, relatively independent of the manner of oxalate addition (one-time or sequential).

结果表明，草酸能显著促进暗棕壤A层磷的释放，土壤磷溶出量随草酸溶液浓度升高而线性增加；但对B层土壤磷的释放效应相对较弱，草酸浓度低於5mmolL^(-1)时B层磷的释放不明显。pH5.16草酸钠溶液比相同浓度的草酸溶液具有更高的解磷效率，在设置二者浓度为0.5~20.0mmolL^(-1)时，前者的解磷量是后者的1.51~2.98倍，推断草酸盐溶液或凋落物淋洗液中草酸类物质促进暗棕壤磷释放的主要机理在於草酸阴离子C2O(上标 2-下标 4配位反应。

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。