共搜索到24317条信息,每页显示10条信息,共2432页。用时:0小时0分0秒328毫秒
Nitric Oxide Alleviates Oxidative Stress Caused by Lanthanum in Rice Leaves Xiao Qiang1,Huang Xuan1,Wu Feihua1,Pei Zhenming3,Zheng Hailei1,Ru Qiaomei1 (1.School of Life Sciences, Xiamen University... sodium nitroprusside (SNP), a donor of NO, in the seedlings grown in Mura B nutrient solution with 100 μmol·L-1 La. Although the content of ascorbate acid (AsA) were scarcely affected by La or NO in our......
Pressure nitric acid leaching of alkali-pretreated low-grade limonitic lateriteYong-Lu Zhang,Cheng-Yan Wang,Yong-Qiang Yang,Fei Yin,Bao-Zhong MaInstitute of Metallurgy, Beijing General Research Institute of Mining and Metallurgy摘 要:The pressure nitric acid leaching of alkali-pretreated low-grade limonitic laterite, as well as removing impurity Al(III......
Trans. Nonferrous Met. Soc. China 22(2012) 206-214 Extraction of cerium(IV) using tributyl phosphate impregnated resin from nitric acid medium O. S. HELALY1, M. S. ABD EL-GHANY1, M. I. MOUSTAFA1...(IV) extraction from nitric acid medium at room temperature. Cerium loading capacity of the impregnated resin reached 95.6% of the calculated theoretical capacity (173 g/kg (Ce/SIR)) under......
......
......
proportions. And then, the sulphuric acid and nitric acid method was used to investigate the leaching characteristic of stabilized heavy metal contaminated soils. The effects of binder types and binder...; sulphuric acid and nitric acid method 1 Introduction Exploitation of non-ferrous metal mines unavoidably causes environmental problem of heavy metal contamination to the soil and groundwater around the mine......
University of Technology, Hangzhou 310014, China) Abstract:Electrochemical corrosion behavior of Nd-Fe-B sintered magnets in nitric acid, hydrochloric acid, sulfuric acid, phosphate acid... is corroded rather seriously and the size of the magnets changed greatly in nitric acid.The surfaces of the corroded magnets in the above mentioned acid solutions are all coarse. Key words:Nd-Fe-B......
. Selective pressure leaching of zinc and manganese from natural and man-made spinels using nitric acid [J]. Hydrometallurgy, 1995, 39: 201-213. [14] PARKER E G. Oxidative pressure leaching of zinc... Pressure acid leaching of zinc sulfide concentrate GU Yan(古 岩), ZHANG Ting-an(张廷安), LIU Yan(刘 燕), MU Wang-zhong(牟望重), ZHANG Wei-guang(张伟光),DOU Zhi-he(豆志河), JIANG Xiao-li(蒋孝丽) Key......
低品位含钼硫化矿直接浸出试验朱军1,王彦君1,李营生1,陈宁1(1.陕西省西安市西安建筑科技大学)摘 要:对比试验结果选择硝酸直接浸出低品位含钼硫化矿工艺,并通过正交试验研究了矿物粒度,浸出剂浓度,浸出温度,液固比,浸出时间等对钼浸出率的影响.结果为液固比,硝酸,硫酸的浓度是影响钼浸出率的主要因素.试验确定了硝酸直接浸出原矿的最优条件:液固比4∶1,用45%的硝酸,20%的硫酸在70℃下浸出粒度为147μm的原矿2h.钼的浸出率可达75%.关键词:冶金技术; 钼; 直接浸出; 硝酸; 正交试验......
......