二磷酸

We have initially examined organocatalytic enantioselective synthesis ofα-Hydroxy phosphonates through the reaction of dialkyl phosphates and aldehydes.

我们初步实验了对映选择性的有机催化二烷基亚磷酸酯和醛的反应不对称合成α-羟基膦酸酯。

The crude oil from the oil field is used as the base fluid and the synthesis condition of gelling agent aluminum dialkyl phosphate in oil-based fracturing fluid is studied in this paper.

根据相似相溶原理和油田原油的组分，探讨了油基压裂液胶凝剂二烷基磷酸酯铝的合成条件，进而对配制的压裂液流变性能、耐剪切性能、破胶性能等进行了测试和评价。

The synthetic process of dialkyl phosphate by reaction of long -chain alcohol with phosphorus oxychloride was studied. The influence of molar ratio of reactants, reaction temperature, reaction time on process of esterification and hydrolysis was investigated too.

研究了以三氯氧磷与正构偶数高碳醇为原料合成磷酸二长直链烷基酯(C10～16-DAP)的工艺条件，考察了物料配比、反应温度和反应时间等因素对酯化反应与水解反应进程的影响，通过正交实验方法，确定了优化的合成工艺条件。

Export VAT refunds for urea products with tariff numbers 3102100010, 3102100090 and 31028000, and diammonium products with tariff numbers 3105300010, 3105300090 and 31054000 have been suspended as from 1 April 2005 regardless of whether an export contract has been registered.

自2005年4 月1 日起，出口商品代码为：3102100010、3102100090、31028000 的尿素产品，和出口商品代码为：3105300010、3105300090、31054000 的磷酸氢二铵产品，不论出口合同是否备案，一律暂停出口退税。

The fertilizers it produces are Diammonium Phosphate and General Ca.

化肥品种为磷酸二铵和普钙。

Different processes for diammonium phosphate production are described, with different effects of heat balance, water balance, ammonia balance and neutralization degree control.

阐述生产磷酸二铵的不同工艺，其热平衡、水平衡、氨平衡与中和度控制的不同情况对装置生产带来的影响。

Buffer solution—Dissolve 7.1g of anhydrous dibasic sodium phosphate in 1liter of water.

缓冲溶液－加入7.1g的无水磷酸二钠于1L水中。

Dissolve the pancreatic digest of gelatin, the dibasic potassium phosphate, and the agar in the water, with warming, and allow to cool.

将白明胶胰酶消化物、磷酸氢二钾、琼脂溶解于水中，伴以加温，并静置放凉。

Objective To investigate the degradation of dicalcium phosphate dehydrate-coated Mg-Zn alloy in vivo and bone formation.

目的 研究二水磷酸氢钙涂层镁锌合金在体内的降解规律及其对新骨形成的影响。

A dicalcium phosphate dihydrate coating was deposited on the surface of pure magnesium in this solution.

使用液相化学沉积技术在纯镁表面制备了二水磷酸氢钙涂层，并通过在SBF中的浸入腐蚀实验研究了涂层对镁耐蚀性的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。