次磷酸次磷酸

XRD analysis results indicate that temperature and time on the tin layer of preferred orientation did not affect the crystal surface structures are based on Sn (220) and Sn (211) the growth of the dominant, while the sodium hypophosphite is conducive to crystal faces of Sn (101) of the formation

XRD分析结果说明温度和时间对镀锡层的择优取向没有影响，晶面结构都是以Sn(220)和Sn(211)生长占优势，而次亚磷酸钠有利于晶面Sn(101)的形成。

On the basis of Ni-S alloy electrode made by electrodeposition method, Ni-P-S alloy electrode was obtained by adding sodium hypophosphite monohydrate into the bath.

在电沉积法制备Ni-S合金电极的基础上，向镀液中添加次亚磷酸钠制备了Ni-P-S合金电极。

The existing bath analyzing methods are compared,as a result a quick and continous method for determining sodium hypophosphite and stannum ion in electroless tin bath is determined.

并对现有的镀液分析方法进行了比较，确定了快速连续测定化学镀锡液中亚锡离子和次磷酸钠的方法。

The ideal high temperature nickel activation process parameter as follow: Nickel acetate concentration 70g·L~(-1);Sodium hypophosphite concentration 70 g·L~(-1);Soakage temperature 40℃;Soakage time 5min ;activation time 30min;Activation temperature 170℃.

理想高温镍活化工艺参数为：乙酸镍浓度70g·L~(-1)，次磷酸钠浓度70 g·L~(-1)，浸渍温度40℃，浸渍时间5 min，活化时间30min，活化温度170℃。

Many studies of phosphorus,glucose,hypoxanthine and cytoplasmic factors on early embryo developmental block carried out by different methods such as morphology,biochemistry,molecular biology and micromanipulation have been reviewed.

对此，人们用形态学、生物化学、分子生物学、显微操作等手段开展了磷酸、葡萄糖、次黄嘌呤和细胞质因素对早期胚胎发育阻滞的影响的研究。

Objective:To study the hypoxanthine phosphoribosyl transferase gene mutation of rat peripheral blood lymphocytes and spleen lymphocytes induced by intermal radiation and of human peripheral blood lymphocytes induced by Y -ray.

目的：本实验主要是用克隆法研究放射性核素内照射诱发Wistar大鼠外周血淋巴细胞和脾淋巴细胞次黄嘌呤鸟嘌呤磷酸核糖转移酶基因突变及γ射线外照射诱发健康成年人外周血淋巴细胞HPRT基因突变情况。

The difference of ammonia, amido, amino group and quaternary ammonium salt, some common wrong expressions on them, and the valence state of phosphorus in some of its oxyacid were pointed out.

指出了氨、氨基、胺基及季铵盐的区别及其常见错误表述，以及磷的几种含氧酸中磷的价态，并着重指出没有"次亚磷酸"的叫法。

The quadratics rotary orthogonal combination design was used to conduct field experiment of integrated balanced of yard manure, urea, calcium superphosphate, potassium chloride and potassium dihydrogen phosphate fertilizer in order to increase the yield of Chinese chestnut.

为提高板栗的产量，对圈肥、尿素、过磷酸钙、氯化钾、磷酸二氢钾等肥料，运用二次旋转正交组合设计，开展综合配套的施肥田间试验。

The optimum conditions to synthesizeβ-carboxyethyl organogermanium sesquioxide were established through orthogonal test: the time from beginning to adding sodium hypophosphite was 0.5h; the molar ratio of germanium dioxide, hydrochloric acid and sodium hypophosphite was 1:7.4:1.4; addition reaction time was 1.5h.

用正交试验确定了最佳工艺条件：从反应开始到加次亚磷酸钠的间隔时间0.5h；n：n：n=1 ： 7.4 ： 1.4；加成反应时间1.5h。

The thermodynamics and the dynamics mechanism have been studied.The results show that it is advisable for the HCHO and NaH_2PO_2 as the reduction due to the electrode potential of the reduction is more negative than that of Cu~ 2+ from the analysis of data in thermodynamics.It is advantage for the reaction of electroless copper in the alkaline solution. According to the analysis of Tafel slope of a cathodal polarization curve,...

结果表明：从热力学数据分析看，还原剂的电极电位皆比铜离子负，用甲醛、次亚磷酸钠做还原剂还原Cu2+在热力学上是可行的，在碱性溶液中对化学镀铜反应有利；从阴极极化曲线的Tafel斜率分析看，Cu2+=Cu+步骤为阴极反应的速度控制环节；从镀液的旋转圆盘电极测试结果分析看，电子跃迁步骤H2CO-ad rdsHCOOH+1/2H2+e-为镀液中阳极反应速度的控制性步骤。

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。