磷化

In this thesis , the effects of acid materials on calcareous soil were studied by using laboratory soil trial and pot experiments trail. The text studied effects of acid materials on pH value in calcareous soil ; studied effects of phosphoric acid (H2SO4 as control) on pH value and micronutrient availability ; studied relation between P and available Fe, Zn in plant; studied effects of acid material on growth of acidophilic plant.

本文采用室内模拟试验和盆栽试验相结合的方法，研究了不同酸性物质对石灰性土壤的酸化效果；磷酸和硫酸对石灰性土壤pH值及微量元素有效性的影响；植物体内磷、有效铁、锌的关系；不同酸性基质对嗜酸植物生长的影响。

Objective To determine the risk of sustained amenorrhea in premenopausal women with systemic lupus erythematosus receiving intermittent pulse cyclophosphamide therapy.

环磷酰胺是临床最常应用的烷化剂，在对由免疫介导的风湿病、肾病、神经系统疾病及血液病等疾病的治疗中，疗效肯定。

Three chiral phosphorus ligands were prepared using anisole as the startingat material.Their applications in the asymmetric hydroformylation and asymmetric conjug ed addition of diethylzinc to enones were investigated.

以苯甲醚为原料，合成了三种新的手性含磷配体，考察了三种配体在不对称氢甲酰化反应和ZnEt2对环己烯酮的不对称共轭加成反应中的应用。

In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.

本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2，3-d]嘧啶的方法，此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵，二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。

To restore the ability of chromium can be dissolved in sulfuric acid, hydrochloric acid and High-FE acid and release hydrogen, but also of pure chromium with aqua regia does not work, when there is the presence of halogen ions in the acid can not be long-term stability, high temperature with alkali, hydrogen sulfide, sulfur steam, phosphorus, ammonia, such as carbon monoxide and water vapor reaction of the corresponding compounds, in the high temperature reaction of silicon into the silicide also chromium, chromium alloys with many metals generate a wide range of industrial applications, such as chromium-manganese stainless steel is used extensively for chemical plants.

铬的还原能力强，能溶于硫酸、盐酸和高FE氯酸而放出氢气，但纯铬连王水也不起作用，当有卤素离子存在时，在酸中不能长期稳定，高温时能与强碱、硫化氢、硫蒸汽、磷、氨、一氧化碳和水蒸汽等反应生成对应的化合物，在高温下还能与硅反应成硅化铬，铬能与许多金属生成合金广泛在工业上应用，如铬锰不锈钢大量用于化工设备。

"To achieve such a miracle, the semiconductor industry has gone to extremes, using the world's most toxic substances like Arsine, Phosphine, Hydrofluoride, Hydrobromide and the like."

但是，为了这种"奇迹"，半导体技术也到了无所不用其极的地步，世上最剧毒的物质如砷烷(AsH3)、磷烷(PH3)、氟化氢、溴化氢，等一长串毒品全都用上。

To achieve such a miracle, the semiconductor industry has gone to extremes, using the world's most toxic substances like Arsine, Phosphine, Hydrofluoride, Hydrobromide and the like.

但是，为了这种"奇迹"，半导体技术也到了无所不用其极的地步，世上最剧毒的物质如砷烷（AsH3）、磷烷（PH3）、氟化氢、溴化氢，等一长串毒品全都用上，很快连同步加速器也要用上去了。

A salt of bromic acid.To achieve such a miracle, the semiconductor industry has gone to extremes, using the world's most toxic substances like Arsine, Phosphine, Hydrofluoride, Hydrobromide and the like.Soon, even Synchroton will be used.

但是，为了这种"奇迹"，半导体技术也到了无所不用其极的地步，世上最剧毒的物质如砷烷(ah3)、磷烷(ph3)、氟化氢、溴化氢，等一长串毒品全都用上，很快连同步加速器也要用上去了。

Based on the retrieval and review of the bibliographer, the original process for the preparation of Dimethyl Phosphite in Zhejiang Xinan Chemical co., Ltd was evaluated.

论文在文献阅译和工艺原理分析的基础上，结合浙江新安化工集团股份有限公司原亚磷酸二甲酯生产装置的实际，研究了以甲醇、三氯化磷为原料的无溶剂的连续化生产新工艺。

The bimodal pattern of nutrient variation is characterized by consumption in spring, increase in summer and autumn, and accumulation in winter.

河流输送量的变化，对氮的影响最显著，对磷的影响次之，但硅对河流的响应并不强烈，这因为胶州湾的硅主要来自底矿化。

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。