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Firstly, based on the acidity balance equation in ecosystem, together with the steady state mass balance equations of sulphur and nitrogen, formulae for calculating critical loads of not only acidity and sulphur, but also acidifying nitrogen and nutrient nitrogen were educed.

基于原有的生态系统酸度平衡关系,并结合临界状态下和氮的稳态质量平衡,推导出计算酸度、、酸化氮和营养氮临界负荷的公式。

The fetid odor principal constituentis the ammonia (R3N), the hydrogen sulfide (H2S), the methanthiol(CH3SH) two armor sulfur (CH3SCH3) and so on (3)The ozone deodorizes the principle is through its formidableoxidation, the decomposition above has the fetid odor matter molecularstructure, achieves the purification air the goal.

主动进攻—就是最有效的防守自然界的异味、臭味的主要成分是氨(R3N)、化氢(H2S)、甲醇(CH3SH)二甲化物(CH3SCH3)等;臭氧除臭的原理是通过其强大的氧化作用,分解上述产生臭味物质的分子结构,以达到净化空气的目的。

Coordination polymers of dimethyl sulfide: Using P2S5 as deoxygenating agents, three coordination polymers containing dimethyl sulfide, [4(CH3SCH3)3]n (34) and n X = Cl(35, Br(36) have been successfully synthesized.

醚类化合物本文首次利用P2S5作为有机物的脱氧剂,在溶剂热条件下,成功地合成3种亚铜甲醚配位聚合物[4(CH3SCH3)3]n (34)和n X = Cl(35, Br(36)。

In the producer gas sulfur originates in the gasification uses the coal, mainly by the H2S form existence, gasifies with the coal in the sulfur has 80% to transform H2S approximately to enter the coal gas, if, gasifies with the coal including the sulfur quantity is 1%, after the gasification changes over to in the coal gas to form about H2S approximately 2-3g/Nm3, but professions and so on ceramics, kleit contain the sulfur quantity request to the coal gas are 20-50 mg/Nm3; If in after coal gas H2S burning transforms SO2 is completely about 2.6g/m3, stipulates the SO2 highest emissions density target compared to the country to outdo many.

发生炉煤气中的来源于气化用煤,主要以H2S形式存在,气化用煤中的约有80%转化成H2S进入煤气,假如,气化用煤的含量为1%,气化后转入煤气中形成H2S大约2-3g/Nm3左右,而陶瓷、高岭土等行业对煤气含量要求为20-50 mg/Nm3;假如煤气中的H2S燃烧后全部转化成SO2为2.6g/m3左右,比国家规定的SO2的最高排放浓度指标高出许多。

With 5-6 days and inoculum of 2%, the bioleaching efficiencies of Cu, Pb and Zn were 96.5%, 41.4% and 82.9%, respectively, which was similar to bioleaching with high strength inocula.

浓度越高,污泥样品pH值下降越快,3g/L、4g/L和5g/L的浓度下,Cu、Pb和Zn的沥滤效率相差不大。

Alteration and modification on two-dimensional electrophoresis in Arabidopsis thaliana , such as improvements in protein extraction, lyses buffer, adding thiourea, provide a better separation result. This paper has an optimism of the experimental conditions on two-dimensional electrophoresis.

通过对拟南芥双向电泳技术过程中的适当改进,如蛋白质的提取与溶解方法、上样量和聚丙烯酰胺凝胶浓度,加入脲,酸钠等,对拟南芥双向电泳技术进行了优化,提高了双向电泳图谱的蛋白质点数目与分辨率。

Acidic aqueous ferric sulfate was abstained by heating maturating, dissolving and filtration process of mixture of pyrite cinders and sulfur acid.

摘 要:铁矿烧渣是酸制备过程中产生的固体废弃物。将铁矿烧渣与酸混合后,经过熟化、水溶、过滤得到酸性酸铁溶液。

A novel polymeric organic thermal stabilizer for PVC was designed and synthesized by acryloylthiourea grafting on polystyrene which was nitrified by HNO3 and then reducted by Sn powder to amine.

以经部分硝化和还原的低分子量聚苯乙烯为母链,利用其胺基和丙烯酰基异氰酸酯加成,合成了一种新型有机高分子型PVC 热稳定剂——丙烯酰基脲接枝聚苯乙烯,其结构经IR和元素分析表征。

Based on the study of rock textures and structures, and stable isotopes of dolomite and S isotope of barite interlayers within the cap dolomite outcropped in the Miaohe area in the Three Gorge, it is testified that the stable isotopes show a strong negative excursion, and the isotopes of sulfur show a significant positive excursion, which is similar to the reported data of authigenic barites formed in a modern seafloor gas hydrate environment. Therefore, it can be concluded that the cap dolomite was most likely formed in a special environment under which a huge gas hydrate dissociated with the breakup of "Snow Earth" in later Neoproterozoic.

通过对湖北三峡庙河地区出露的&盖帽&白云岩的野外地质构造、碳-氧稳定同位素和重晶石夹层的稳定同位素特征的研究,发现除了明显的碳稳定同位素的负偏移之外,重晶石的同位素值表现出明显的正偏移,其数值可与现代海底甲烷喷气孔附近的自生重晶石矿物的同位素组成相对比,进而认为&盖帽&白云岩的成因是末元古代&雪球&事件之后天然气水合物的释放与全球环境突变背景下的沉积产物。

Properties of sulfur passivated GaAs (100) surfaces are studied by using photoelectron spectroscopy and photoluminescence measurem...

本文通过光电子能谱的手段和光荧光谱的方法分析了钝化GaAs(100)的性质并在此基础之上对钝化的实际应用进行了初步的尝试取得了较好的效果。

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