氢离子

These data suggest that in patients receivingH2-antagonist therapy for longer than 4 wk, prophylaxis foracid aspiration pneumonia should include preanesthetic PPI medication.

这些数据表明长期使用氢离子拮抗剂（疗程大于4周）的病人，预防酸性吸入性肺炎应包括麻醉前使用 PPI 。

A pyrimidine base, C5H6N2O2, that is an essential constituent of DNA.

一价的在酸碱反应中只有一个氢离子转移到碱上的；一碱价的

Using Extended Virial theorem , three recurrence relation of the average value of coordinate operator for linear harmonic oscillator, spherical harmonic oscillator and like-hydrogen ion were obtained respectively.

针对一维谐振子、类氢离子和三维各向同性谐振子三个量子体系，应用超维里定理，推导了幂坐标算符平均值的递推关系，方法较通常简洁明了。

A simplified model which considers the partially ionized plasma as hydrogen-like ions is presented. Classical electrodynamics theory is employed to study the action of ponderomotive force on bound electron and the effect of ponderomotive force on the generation of laser plasmas. A relation between generation of laser plasma and laser wave train length is obtained.

通过建立简化的物理模型，即将部分电离的等离子体简化为类氢离子，使用经典电动力学理论，研究激光有质动力对束缚电子的作用；讨论了激光有质动力对激光等离子体产生的影响；得出了激光等离子体的产生与激光波列长度的定量关系。

The invention discloses an application of polyhalogenated acridone compound in a buffer solution as a pH fluorescent probe for high selective identification of hydrogen ions.

本发明公开了一种多卤代吖啶酮类化合物作为pH荧光探针在缓冲溶液中对氢离子高选择性识别的应用。

Based on the absorbance change of indicators with the concentration of hydrogen ion released from the enzyme-catalyzed reaction, a convenient colorimetry method is established for the assay of acidic phospholipase 〓 and glycogen phosphorylase b Brilliant yellow and bromothymol blue are chosen as indicators for assays of acidic phospholipase 〓 and glycogen phosphorylase b by following the absorbance changes at 495 nm and 615nm respectively The method is simple, sample-saving, sensitive and valid for a wide range of enzyme concentrations.

为了研究糖原磷酸化酶的激活动力学和酸性磷脂酶〓的复性过程，我们根据酶催化反应中释放氢离子浓度的变化引起相应的指示剂的光吸收发生变化的原理，建立了一种简捷的比色法，用于测定酸性磷脂酶〓和糖原磷酸化酶b的活性。选用亮黄和溴麝香草酚兰分别作为酸性磷脂酶〓和糖原磷酸化酶b测活的指示剂，在495 nm和615 nm处检测二者的光吸收值的变化，可以测定酶活。本方法的优点是，可在比较宽的酶浓度范围内进行活力测定，而且操作简单、节省样品、灵敏度高。

An isocratic HPLC assay was developed for simultaneous determination of levodopa methyl ester and levodopa in the hydrolysate of levodopa methylester.

采用等度高效液相分析方法同时检测左旋多巴甲酯及其水解产物左旋多巴，得到了一系列水解速率常数以及氢离子浓度和温度对水解反应的影响。

Principle— The titrimetric determination of water is based upon the quantitative reaction of water with an anhydrous solution of sulfur dioxide and iodine in the presence of a buffer that reacts with hydrogen ions.

原理---水分滴定测定法是基于水与二氧化硫和碘的无水溶液，在能与氢离子反应的缓冲溶液下发生的定量反应。

The gallbladder mucosa absorbs excess water and electrolytes and secretes hydrogen ions, concentrating and acidifying bile.

胆囊粘膜吸收多余的水、电解质，分泌氢离子，从而浓缩和酸化胆汁。

It is a weak base and dissociates into water and carbon dioxide gas as it dissolves in the presence of hydrogen ions.

它是一种弱碱，当溶解在存有氢离子的溶剂中时即分解为水和二氧化碳气体。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。