Thin films of titanium carbide and amorphous hydrogenated carbon have been synthesized on titanium aluminium alloy substrates by PSII assisted MW-ECRCVD with a mirror field. The microstructure, chemical composition an...Thin films of titanium carbide and amorphous hydrogenated carbon have been synthesized on titanium aluminium alloy substrates by PSII assisted MW-ECRCVD with a mirror field. The microstructure, chemical composition and mechanical property were investigated. Using XPS and TEM, the films were identified to be a-C：H film containing TiC nanometre grains （namely, the so-called nanocomposite structure）. The size of TiC grains of nanocomposite TiC/DLC film is about 5 nm. The nanocomposite structure has obvious improvement in the mechanical properties of DLC film. The hardness of a-C：H film with Ti is enhanced to 34 G Pa~ while that of a-C：H film without Ti is about 12 G Pa, and the coherent strength is also obviously enhanced at the critical load of about 35N.展开更多
利用2个耐盐和2个盐敏感的陆地棉品种,分别设置对照和4%(40 g L–1)浓度NaCl溶液处理三叶期幼苗,处理72 h后调查盐害指数,测定地上部分鲜重、根鲜重、叶片相对含水量、叶绿素荧光参数、相对电导率、丙二醛含量、抗氧化酶类活性等13个与...利用2个耐盐和2个盐敏感的陆地棉品种,分别设置对照和4%(40 g L–1)浓度NaCl溶液处理三叶期幼苗,处理72 h后调查盐害指数,测定地上部分鲜重、根鲜重、叶片相对含水量、叶绿素荧光参数、相对电导率、丙二醛含量、抗氧化酶类活性等13个与耐盐性相关的重要指标。利用灰色关联聚类、主成分分析和逐步回归等方法综合评价陆地棉苗期耐盐性,认为最大光化学效率(Fv/Fm)可以作为鉴定陆地棉苗期耐盐性的关键指标,构建耐盐指数(y)方程y=1.943x–0.882(x=最大光化学效率),同时结合另外2个耐盐和2个盐敏感品种所得方程y值对耐盐等级进行划分。进一步利用23个已知耐盐性的品种检验方程,计算结果与田间鉴定结果完全一致。因此选用最大光化学效率作为唯一指标鉴定陆地棉苗期耐盐性,高效准确,同时通过构建方程和划分耐盐等级,为未来大规模陆地棉品种资源耐盐性鉴定提供技术标准和研究基础。展开更多
文摘Thin films of titanium carbide and amorphous hydrogenated carbon have been synthesized on titanium aluminium alloy substrates by PSII assisted MW-ECRCVD with a mirror field. The microstructure, chemical composition and mechanical property were investigated. Using XPS and TEM, the films were identified to be a-C：H film containing TiC nanometre grains （namely, the so-called nanocomposite structure）. The size of TiC grains of nanocomposite TiC/DLC film is about 5 nm. The nanocomposite structure has obvious improvement in the mechanical properties of DLC film. The hardness of a-C：H film with Ti is enhanced to 34 G Pa~ while that of a-C：H film without Ti is about 12 G Pa, and the coherent strength is also obviously enhanced at the critical load of about 35N.
文摘利用2个耐盐和2个盐敏感的陆地棉品种,分别设置对照和4%(40 g L–1)浓度NaCl溶液处理三叶期幼苗,处理72 h后调查盐害指数,测定地上部分鲜重、根鲜重、叶片相对含水量、叶绿素荧光参数、相对电导率、丙二醛含量、抗氧化酶类活性等13个与耐盐性相关的重要指标。利用灰色关联聚类、主成分分析和逐步回归等方法综合评价陆地棉苗期耐盐性,认为最大光化学效率(Fv/Fm)可以作为鉴定陆地棉苗期耐盐性的关键指标,构建耐盐指数(y)方程y=1.943x–0.882(x=最大光化学效率),同时结合另外2个耐盐和2个盐敏感品种所得方程y值对耐盐等级进行划分。进一步利用23个已知耐盐性的品种检验方程,计算结果与田间鉴定结果完全一致。因此选用最大光化学效率作为唯一指标鉴定陆地棉苗期耐盐性,高效准确,同时通过构建方程和划分耐盐等级,为未来大规模陆地棉品种资源耐盐性鉴定提供技术标准和研究基础。
