二磷酸

Potassium Dihydrogen Phosphate is a non-linear optical material used for laser frequency conversion and electrooptic modulators,it is typically machined by single point diamond turning.

压痕和刻划实验是测量材料弹性、塑性和断裂行为的最简单方法，磷酸二氢钾作为优质的非线性光学材料，常用作光学频率转换器件和电光开关元件，一般采用单点金刚石车削的方法加工此类零件。

Acceptable resolutions were achieved when it was applied for the separation of dipeptides including Leu-Tyr and Val-Tyr by using 1-butanol-acetic acid-water (4:1:5, V/V/V) solvent system. The proteins including cytochrome C and myoglobin, lysozyme and myoglobin, and fresh chicken egg-white proteins were well separated by 12.5% PEG1000-12.5% K2HPO4-75% water (pH 9.0) and 16% PEG 1000-12.5% K2HPO4-71.5% water (pH 8.0) system.

应用研究表明，采用正丁醇-醋酸-水(4：1：5， V/V/V)和PEG1000-磷酸钾盐-水(12.5：12.5：75， W/W/W)(pH 9.0)体系可以在较高的流动相流速和较高的固定相保留下分别实现对亮氨酸-酪氨酸和缬氨酸-酪氨酸二肽混合物以及细胞色素C与肌红蛋白、肌红蛋白与溶菌酶混合物及鸡蛋清样品中蛋白成分的成功分离。

Wedgeplug O-Seal plug valves with their positive, no-leak features are not only recommended as the best general purpose valves for handling hydrocarbons, vegetable oils, solvents, etc., but are ideal for such tough service as butane, propane, butadiene, acetone, ethyl alcohol, ammonia, anhydrous ammonia, benzene, vinyl chloride, dry chlorine, Dowtherm, ethane, ethylene, hydrogen chloride, napthalene, oxygen, hydrogen, phthalic anhydride, dry phosgene, phosphoric acid, potassium carbonate, styrene, molten sulphur, sulphur dichloride and related services within a temperature range from -300oF to + 450oF within pressure limits of the valves.

楔塞O形密封旋塞阀具有积极的、无泄漏特性，不但是最好的通用的阀门，用于处理碳化氢，植物油，溶剂等，还特别适用于严酷的应用环境，如丁烷，丙烷，丁二烯，丙酮，乙醇，氨，无水氨，苯，氯乙烯，干氯，道氏热载体，乙烷，乙烯，氯化氢，萘，氧，氢，邻苯二甲酸酐，干碳酰氯，磷酸，碳酸钾，苯乙烯，融化硫，二氯化硫，以及温度在-184oC至232oC之间，压力在阀门额定压力等级范围内的有关应用。

Results:DMY acetates could be synthesized effectively using phosphoric acid as catalyst,the antioxidation effect of DMY acetates were better than DM...

结果：用磷酸作催化剂，可有效地合成二氢杨梅素酯，所合成的化合物均有较强的抗氧化能力。

The proteins in milk and dairy products were mostly eliminated by the precipitators. Three aseptics and two sweeteners were separated on a C18 column with the mobile phase of methanol -0.05mol/L potassium dihydrogen phosphate under gradient elution. With a diode array detector, acesulfame, benzoic acid, and sorbic acid were detected at 230 nm and sodium saccharin and aspartame were detected at 210nm.

通过加入适量沉淀剂除去样品中绝大部分蛋白质后，采用C18色谱柱分离，以甲醇－0.05mol/L磷酸二氢钾溶液为流动相梯度洗脱，用二极管阵列检测器于230nm波长处检测安赛蜜、苯甲酸和山梨酸，于210nm波长处检测糖精钠和阿斯巴甜。

The raw material is the prepared glass which come from the first process, and the bubblier (CaCO3), the stabilizer (Na3PO4-12H2O).

二次烧结是制备泡沫玻璃的过程，原料采用一次烧结的玻璃粉为主要原料，碳酸钙(CaCO_3)为发泡剂，磷酸钠(Na_3PO_4·12H_2O)为稳定剂。

Theconventional method was improved by using high concentrationinorganic acid instead of Ce〓 to catalyze the cleavage of thephosphodiester bond of cobalamin.

采用高浓度无机酸替代传统的氢氧化铈催化水解钴胺素的侧链磷酸二酯键，生成相应的钴啉醇酰胺。

Dinucleotide A compound of two nucleotides linked by their phosphate groups .important examples are the coenzymes NAD and FAD.

二核苷酸：由磷酸基团连接的两个核苷酸组成的化合物。例如辅酶 NAD 和 FAD 。

Department of Chemical Pharmacology, Capital University of Medical Science, Beijing 100054, ChinaAbstract: A reversedphase high performance liquid chromatographic method was developed for the simultaneous quantitative determination of caffeine, dapsone and chlorzoxazone. The operation was carried out on a C18 column (250 mmX4.6 mm i.d., 5.0 μm) with the mobile phase of acetonitrilephosphate buffer including 0.02 mol/L KH2PO4 and 0.02 mol/L (C2H53N, pH 6.5(25:75 in volume ratio).

用反相高效液相色谱同时测定血清中咖啡因、氨苯砜、氯唑沙宗探针药物的质量浓度，以乙腈磷酸盐缓冲体系(含 0.02 mol/L的磷酸二氢钾和0.02 mol/L的三乙胺，pH 6.5)(体积比为25：75)为流动相，以安替比林为内标，经C18柱(250 mmX4.6 mm i.d。， 5.0 μm)分离，紫外检测器检测，使3种探针药物得到较好的分离，并且在有效血药浓度范围内线性良好。

To develop a sampling method of the Dibutyl Phosphatein the air of workplace.

目的 研究作业场所空气中磷酸二丁酯的采样监测方法。

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。