二磷酸

The synthesis of monomethylhydrazine was investigated with dimethyl phosphite as methylating agent.

以亚磷酸二甲酯为甲基化试剂，一步合成了单取代的一甲基肼。

The levels of serum phosphocreatine kinase, lactic dehydrogenase, aspartate aminotransferase, malondialdehyde and superoxidedismutase were monitored dynamically before the experiment and 2, 12, 24, 48, 96, hours as well as 1 and 2 weeks after looseing the tournique.

在实验前以及松开止血带后2、12、24、48、96h、1周和2周后连续、动态检测血浆磷酸肌酸激酶、乳酸脱氢酶、谷草转氨酶、丙二醛浓度和超氧化物歧化酶活性。

The optimum conditions for extraction was proved practicable by condition filtration and orthogonal design with supersonic wave method .The results showed that the optimum conditions for extraction to ultrasonic method is : methanol (φ=40,20ml),and 15℃ for 30 min ,this paper has determined nicotine contents that is 23.50mg/g at absorption peak (λ=262nm) by HPLC with an eluent consisting of methanol –potass Phosphate alleciate (pH=3) with the recovery and coefficient of variation are 101.52% and 0.91%.

通过超声波提取方法进行条件筛选和正交化实验，确定了烟草中尼古丁的最佳提取条件，结果表明，超声波最佳条件是：甲醇浓度40%，固液比1：20，提取时间30 分钟，超声温度15℃，用高效液相色谱方法在波长262nm 处测定尼古丁的含量，流动相组成为甲醇：磷酸二氢钾缓冲溶液=10：90，测得烟草中尼古丁的含量为23.50 mg/g，平均回收率为101.52%，相对偏差为0.91%。

The chloride-free potash fertilizer include potassium sulphate ,potassium nitrate,potassium dihydrogen phosphate and so on.

我国目前生产的无氯钾肥主要有硫酸钾、硝酸钾和磷酸二氢钾等。

One such effect may be involved in the potentiation of the Iso relaxation of isolated guinea pig airways.

Nic和Theo一样，可能通过抑制磷酸二酯酶而增高Iso对气管平滑肌的舒张作用。

Methods Blood samples were collected from the precaval vein of 6 female Tibet mini-pigs to test the concentration of sex hormones including T,P4,E2,FSH,LH,PRL and blood biochemical indexes including Ca, Mg, P, ALP, Cre, CHO, TP, and Alb during the estrous cycle.

对6头雌性西藏小型猪在发情周期内的发情当天、第5天、第10天、第15天、再次发情时分别采血5 mL并分离血清，应用放射免疫法测定血清睾酮、孕酮(P4)、雌二醇(E2)、促卵泡生成激素、促黄体生成激素、泌乳素；用自动生化仪测定血清钙、镁、磷、碱性磷酸酶、肌苷、总胆固醇、总蛋白、白蛋白。

Based on the nitrite catalyzed oxidation of pyrocatechol violet by potassium bromate, a new catalytic spectrophotometric method for determination of trace nitrite has been developed.

基于在磷酸溶液中，亚硝酸根对溴酸钾氧化邻苯二酚紫的褪色反应具有催化作用，建立了催化光度法测定微量亚硝酸根的新方法。

Objective To establish bacterial endotoxin test of Cytidine Disodium Triphosphate Injection instead of pyrogen method.

目的通过试验确定三磷酸胞苷二钠注射液细菌内毒素的具体检测方法。

On a ZORBAX Stable Bound (2.150 mm, 1.8 m), the rutin、quercitrin、quercitrin-3-O-giucoside and quercitrin-3-O-galactose could be separated completely with 0.05 mol/L potassium dihydrogen phosphate and methanol as mobile phase (40:60,V/V) at a flow rate of 0.3 ml/min and detected with a photodiode array detector .

在色谱柱为ZORBAX Stable Bound (2.150 mm， 1.8 m)，流动相为0.05 mol/L的磷酸二氢钾缓冲溶液-甲醇(40：60，V/V)，流速为0.3 ml/min，在检测波长为360 nm的色谱条件下，芦丁、槲皮素、槲皮素-3-O-葡萄糖苷和槲皮素-3-O-半乳糖苷分离效果好，方法灵敏度高，重现性好，用于测定雪莲果叶中的上述几种黄酮芦丁型黄酮，效果满意。

The product was analysised and pure of the product was botained by X- raying .The application of the product in sewage disposal was described also.

对产品进行分析鉴定，并通过X光衍射证明产品的纯度及回收的磷酸二氢钾在污水处理中的应用情况。

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。