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  • Discussion on Ten Concerns of Environmental Protection of In-situ Leaching Uranium in China

    Subjects: Nuclear Science and Technology >> Nuclear Science and Technology submitted time 2024-05-23

    Abstract: In-situ leaching is the main process of natural uranium production in China. The environmental protection problems in the process of construction, operation and decommissioning have been widely concerned. The production of wastes was introduced in this paper, and ten issues of concern were raised, included bleed ratio, drilling mud disposal, monitoring well setting, groundwater baseline determination, abnormal data determination of monitoring well, wastewater treatment, evaporation pool operation, target value determination of groundwater restoration, groundwater remediation and waste minimizaton. the present situation of technology and management was discussed, and the main task and research direction in the field of environmental protection of in-situ leaching of uranium mining were pointed out, in order to provide some suggestions for the sustainable development of in-situ leaching of uranium mining。

  • 热休克蛋白70在牦牛胃中的分布和表达

    Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》

    Abstract:本试验旨在研究牦牛热休克蛋白70(HSP70)在牦牛胃中的分布特点和表达量的差异性变化。采集8头健康成年牦牛的胃组织,采用组织学染色方法研究皱胃腺体间细胞的类型;免疫组化法和蛋白质免疫印迹(WB)法分别检测HSP70在不同胃的分布及表达量。结果表明:嗜银染色及阿利新蓝-过碘酸-雪夫(AB-PAS)染色发现,皱胃腺体间含有大量的内分泌细胞。免疫组化检测发现,在牦牛瘤胃、网胃、瓣胃,HSP70的阳性表达仅见于黏膜上皮细胞层,角质层细胞呈强阳性表达,而基底层、颗粒层和棘层的部分细胞呈中等阳性表达,部分未见阳性表达;皱胃阳性反应的范围较广,不仅黏膜表面上皮细胞有表达,胃腺间的内分泌细胞及壁细胞也呈阳性表达。且阳性反应主要集中在细胞的胞质和胞核。免疫组化和WB结果均表明,HSP70在牦牛皱胃表达量最高,瘤胃、网胃及瓣胃依次递减,部位间差异极显著(P<0.01)。综合得出,牦牛皱胃腺体间含有大量嗜银性内分泌细胞,HSP在所有胃中均有分布,且皱胃的表达量显著高于其他胃,提示HSP70可能与牦牛胃的消化吸收有一定的关联性。

  • 不同比例青干草与青贮玉米对崂山奶山羊泌乳性能和血清生化指标的影响

    Subjects: Biology >> Zoology submitted time 2017-10-11 Cooperative journals: 《动物营养学报》

    Abstract:本文旨在研究不同比例青干草与青贮玉米对崂山奶山羊泌乳性能和血清生化指标的影响。选择产奶量为(1.65±0.05) kg/d的崂山奶山羊2胎母羊20只,随机分为4组,粗饲料青干草与青贮玉米比例分别为8:2(试验Ⅰ组)、6:4(试验Ⅱ组)、4:6(试验Ⅲ组)、2:8(试验Ⅳ组),每组5只。预试期7 d,正试期60 d。结果表明:各组产奶量、干物质采食量和料奶比无显著差异(P>0.05)。乳脂含量在第0天、第20天、第40天无显著差异(P>0.05),第60天试验Ⅱ组显著高于试验Ⅲ组(P<0.05)。试验Ⅱ组的乳蛋白含量平均值显著高于其他各组(P<0.05)。试验Ⅱ组和试验Ⅳ组的血清葡萄糖含量均显著高于试验Ⅰ组(P<0.05),试验Ⅱ组的血清胆固醇含量为最低值,且显著低于试验Ⅲ组(P<0.05)。综合得出,崂山奶山羊粗饲料青干草与青贮玉米以6:4组合效果最好,乳脂、乳蛋白、乳糖等营养物质含量相对较高,血清中胆固醇含量相对较低。