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滑石粉钙含量对酸性抄纸的影响
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作者 范晓英 王文得 《中华纸业》 CAS 北大核心 2003年第5期51-51,共1页
关键词 酸性抄纸 滑石粉 钙合量 麦草浆 书写纸 对比试验
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海带中碘、钙和铁元素含量的测定
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作者 沈达英 《化工中间体》 2015年第7期116-116,共1页
本实验主要是对海带中碘、钙和铁元素进行定量分析,采用灰化法溶解样品,配制标准溶液,采用分析滴定法测定海带中碘、钙和铁三种元素的含量。测定结果为每百克干海带中合碘0.790g、钙2.856g、铁0.140g。该方法的相对平均偏差为0.1... 本实验主要是对海带中碘、钙和铁元素进行定量分析,采用灰化法溶解样品,配制标准溶液,采用分析滴定法测定海带中碘、钙和铁三种元素的含量。测定结果为每百克干海带中合碘0.790g、钙2.856g、铁0.140g。该方法的相对平均偏差为0.19%,表明该种方法可行性很强。 展开更多
关键词 海带 碘含 钙合量 铁含 分析滴定法
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石灰土有效钙镁含量衰减规律的试验分析 被引量:1
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作者 高敏杰 邓永忠 +2 位作者 李国芬 林丽 张高勤 《公路交通科技(应用技术版)》 CAS CSCD 2008年第7期49-51,共3页
通过室内试验分别对石灰土在密闭、低温、洒水、恒温恒湿和暴露5种不同养护条件下灰剂量的衰减情况和干密度(压实度)的变化规律进行试验研究,并研究了石灰土有效钙镁合量和强度之间的关系以及有效钙镁合量衰减的规律,探讨了石灰土路基... 通过室内试验分别对石灰土在密闭、低温、洒水、恒温恒湿和暴露5种不同养护条件下灰剂量的衰减情况和干密度(压实度)的变化规律进行试验研究,并研究了石灰土有效钙镁合量和强度之间的关系以及有效钙镁合量衰减的规律,探讨了石灰土路基和底基层灰剂量和干密度(压实度)之间的关系。指出在施工过程中为确保石灰土施工质量,应及时检验石灰土的干密度(压实度)和灰剂量,或以干密度(压实度)和灰剂量同时控制施工质量。 展开更多
关键词 石灰土 有效 衰减规律 干密度
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Effects of FCMP Compound Fertilizer on Development and Yield of Early Rice 被引量:1
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作者 张海鹏 刘强 +2 位作者 彭建伟 荣湘民 杨艳菊 《Agricultural Science & Technology》 CAS 2012年第11期2299-2302,共4页
[Objective] The aim was to explore effects of FCMP compound fertilizer on growth, development and yield of early rice. [Method] Based on lower-graded phos- phate resource, effects of FCMP compound fertilizers on yield... [Objective] The aim was to explore effects of FCMP compound fertilizer on growth, development and yield of early rice. [Method] Based on lower-graded phos- phate resource, effects of FCMP compound fertilizers on yield and growth of early rice in a field were researched. [Result] FCMP compound fertilizers 0, 1 and 2 en- hanced rice yield, increasing by 21.86%, 20.25% and 13.46%, compared with the rice applied with conventional fertilizer; number of productive ears and grain number per ear in unit area were improved by FCMP compound fertilizer, for example, the two factors achieved the highest with FCMP compound fertilizer 1, increasing by 11.70% and 19.63%. Furthermore, FCMP compound fertilizer promoted plant height and tiller number, maintained high photosynthetic efficiency, enhanced lodging-resis- tance and guaranteed stable and high yield. [Conclusion] The research is of theoret- ical and practical significance for further exploration of production techniques and application of FCMP compound fertilizer. 展开更多
关键词 FCMP Compound fertilizer Early rice GROWTH YIELD
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Effects of calcium addition on as-cast microstructure and mechanical properties of Mg-5Zn-5Sn alloy 被引量:9
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作者 杨明波 程亮 潘复生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第5期769-775,共7页
The effects of Ca addition on the as-cast microstructure and mechanical properties of the Mg-5Zn-5Sn (mass fraction,%) alloy were investigated.The results indicate that an addition of 0.5%-1.5% (mass fraction) Ca to t... The effects of Ca addition on the as-cast microstructure and mechanical properties of the Mg-5Zn-5Sn (mass fraction,%) alloy were investigated.The results indicate that an addition of 0.5%-1.5% (mass fraction) Ca to the Mg-5Zn-5Sn alloy not only refines the as-cast microstructure of the alloy but also causes the formation of the primary and/or eutectic CaMgSn phases with high thermal stability;an increase in Ca amount from 0.5% to 1.5% (mass fraction) increases the amount and size of the CaMgSn phase.In addition,Ca addition to the Mg-5Zn-5Sn alloy improves not only the tensile properties at room temperature and 150 ℃ but also the creep properties.Among the Ca-containing Mg-5Zn-5Sn alloys,the one added 0.5% (mass fraction) Ca obtains the optimum ultimate tensile strength and elongation at room temperature and 150 ℃,however,the alloy added 1.5% (mass fraction) Ca exhibits the optimum yield strength and creep properties. 展开更多
关键词 magnesium alloy Mg-5Zn-5Sn alloy microstructure and properties Ca addition
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