青海省高原型牦牛红细胞钾浓度的多态性

采用火焰光度法对82头青海省高原型牦牛红细胞钾浓度的多态性进行了研究。结果表明：①按红细胞钾浓度，可以将高原型牦牛分为高血钾(HK)和低血钾(LK)两种表型，以HK型为优势表型(76／82，92．68％)；②K^L和K^h等位基因频率分别为0．0373和0．9627；③高原型牦牛红细胞钾浓度基因座的基因杂合度、基因纯合度指数和有效等位基因数分别为0．0718，0．8564和1．0774。     

硫酸氢钾催化合成乙酰水杨酸的研究

硫酸氢钾对水杨酸和醋酸酐合成乙酰水杨酸具有良好的催化作用.最佳的合成条件:水杨酸与醋酸酐的物质的量比为1∶2,硫酸氢钾用量为反应物总量的7%,反应时间为40min,反应温度为70℃,产率为76.4%.     

防腐剂N在液体生物钾肥上的应用

防腐剂N加入液体生物钾肥中，对罐装过程中杂菌污染引起的产品变黑变臭有明显抑制作用，防腐效果明显优于丙酸钠、苯甲酸钠等防腐剂。浓度为0．4％时，既能解决产品变质问题，又对钾细菌保存、生长繁殖、解钾功能无不利影响。     

电导滴定联机测定钾盐中钾的含量

提出将电导滴定装置与PC机联机测定钾盐中钾的含量,用专门编写的程序采集滴定数据和动态显示滴定曲线.这种联机方式可以提高分析结果的精密度,平行测定5次,其实验结果的变异系数≤0.1%.     

碱式亚磷酸-磷酸钾锌无毒防锈颜料的研究

作者利用亚磷酸根和磷酸根防锈性能的协同效应,合成了一种新型的无毒防锈颜料——碱式亚磷酸-磷酸钾锌。它们的防锈性能超过了亚磷酸锌、磷酸锌,甚至超过铅丹。测定了它们的组成、结构及技术指标,并对其防锈机理进行了初步探讨。     

施肥对人工羊草地的产草量及养分吸收的影响

在人工羊草地上进行氮、磷、钾肥料实验,研究施肥对羊草产草量及养分吸收的影响.结果表明,肥料单施氮肥效果好,产草量达9.65t/hm~2,较不施肥增产2.75倍,较单施磷肥和钾肥增产71.0%和84.0%;肥料配施效果优于单施,氮、磷肥配施较单施氮肥和磷肥增产19.6%和105.3%,氮、磷、钾肥配施最好,产草量达14.11t/hm~2,较氮、磷肥配施增加16.5%,较单施氮、磷、钾肥分别增产26.6%,117.6%和122.7%.施肥可显著提高羊草对氮、磷、钾的吸收,单施氮肥羊草的氮、磷、钾的积累量分别较不施肥增加7.51,2.98,2.99倍;氮、磷、钾肥配施的养分积累量最高,氮、磷、钾较单施氮肥分别增加15.3%,27.9%和36.6%.     

40Ar/39Ar ages and stable isotopes of supergene jarosite from the Baiyin VHMS ore field,NE Tibetan Plateau with paleoclimatic implications

Supergene jarosite is widely distributed in weathering profiles derived from hypogene sulfide ores.Precise40Ar/39Ar dating and determination of hydrogen and oxygen isotopes of supergene jarosite can not only place tight constraints on the timing and history of continental weathering and supergene enrichment of sulfide ore deposits,but also shed significant insights into paleoclimatic conditions and tectonic uplift responsible for the weathering.In this paper,we present a preliminary study of40Ar/39Ar geochronology and stable isotope geochemistry of supergene jarosite from the early Paleozoic Zheyaoshan volcanic-hosted massive sulfide deposit of the Baiyin ore field located in the eastern portion of the Qilian Mountain along the northeastern(NE)margin of the Tibetan Plateau in an attempt to better understand the climatic conditions prevailed during the pervasive weathering in the region.Jarosite from the Zheyaoshan mining area occurs either as gravels within alluvial deposits over low-relief flat-top hills or cm-wide veins crosscutting weathered sulfide ores or their wall rocks.The gravels consist of massive jarosite aggregates with tabular crystal morphology and contain 8.21 wt%–8.31 wt%K2O on average.Two jarosite grains extracted from the gravels(08-02-2 and 08-02-5)yield well-defined40Ar/39Ar plateauages of 37.1±0.3 and 41.2±0.4 Ma(2r),respectively.They have dD values of-133%and-156%,and d18OSO4values of 2.6%and 2.5%.The vein-type jarosite consists of hexagonal pyramid crystals and contains much lower K2O,averaging at 2.44 wt%–2.72 wt%.Two jarosite veins(06-16-3 and 06-16-4)yield similar plateau ages of 3.2±0.1 and 3.3±0.1 Ma(2r),respectively.These jarosite veins have dD values of-158%and-160%,and d18OSO4values of 2.8%and 2.5%.The40Ar/39Ar ages indicate that sulfide ores of the Zheyaoshan deposit must have been brought to the surface since the late Eocene,and subsequently subjected to prolonged oxidation and supergene enrichment.The precipitation and preservation of jarosite in weathering profiles indicate that arid–semiarid climatic conditions must have been prevailed since the late Eocene.The hydrogen and oxygen isotopes of the jarosite further point to variation of climatic conditions in the area,with the Pliocene being slightly cooler relative to the late Eocene.Given that weathering profiles overlying sulfide ore deposits are widely distributed along the Qilian Mountain,systematic studies of40Ar/39Ar geochronology and stable isotope geochemistry of jarosite-group minerals from these profiles would provide valuable information on the timing and evolution of regional tectonic uplift,paleoclimatic changes,and supergene mineralization in this mountainous belt along the NE edge of the Tibetan Plateau.