运动中的酸碱平衡与碱盐摄入     

王晨 《体育科研》2003,24(4):60-61

采用文献资料法对人体酸碱平衡机制进行分析研究,并对碱盐摄入与对运动员成绩的影响进行了探讨,结果认为适当碱盐摄入对提高运动成绩有帮助.  相似文献   

试论南京国民政府对我国盐政主权的收回     

姚顺东 《哈尔滨学院学报》2004,25(5):44-47

南京国民政府成立后，在关税自主、恢复和保留盐务稽核所的同时，通过变更职权和对洋人任用的变更开始了收回我国盐政主权的活动。南京国民政府当时对我国盐政主权的收回活动，现在看来，具有一定的历史意义。  相似文献   

Environmentally-induced stone decay: the cumulative effects of crystallization–hydration cycles on a Lincolnshire oopelsparite limestone     

Belinda J. Colston  David S. Watt  Helen L. Munro   《Journal of Cultural Heritage》2001,2(4)

An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.  相似文献   

论海盐文化在重塑现代化“盐”城形象中的地位     

于海根 《自贡师范高等专科学校学报》2006,21(2):15-19

盐城有着两千多年的产盐历史，聪慧勤奋的盐城人创造了灿烂辉煌的海盐文化。底蕴丰厚的海盐文化遣存是中国海盐业发展的历史缩影。璀灿的海盐文化是盐城沟通世界的桥梁。多元的海盐文化符号融入城市建设是重塑名实相符的现代化“盐”城的必然选择。  相似文献   

植物耐盐性的信号传导途径及基因工程进展     

陈玉芹  陈桂平  项慧新 《唐山师范学院学报》2003,25(5):50-52

就近几年来植物耐盐方面的研究热点如植物耐盐信号传导途径及植物耐盐基因工程进展等方面作了综述。  相似文献   

盐胁迫对红麻种子萌发及幼苗生长的影响     

刘明久  李丁涛 《河南职业技术师范学院学报》2011,(4):9-11

研究了不同浓度的钠盐（Na2SO4和Na2CO3）胁迫对红麻种子萌发和幼苗生长的影响.结果表明：不同浓度盐胁迫对红麻种子的发芽指标和活力指数均有一定抑制作用,随浓度的增加抑制作用越强.浓度10~50 mmol/L的Na2SO4胁迫下,红麻种子的发芽势、发芽指数与对照没有显著差异,但活力指数显著低于对照,而当Na2SO4浓度为100 mmol/L时种子的发芽势、发芽指数与对照存在显著差异,Na2SO4浓度为200 mmol/L时种子不能萌发;Na2CO3浓度≥50 mmol/L时,红麻种子不能萌发.相同浓度下,Na2CO3比Na2SO4对红麻种子萌发的抑制作用更明显.  相似文献   

NaCl胁迫对不同番茄品种幼苗及果实的影响     

鲍维巨  方巍  张琪晓  吴菊  杨飞 《河南职业技术师范学院学报》2011,(4):12-14

研究了NaCl胁迫对5个不同番茄品种的幼苗生长、果实可溶性糖含量及产量的影响.结果表明,盐胁迫抑制了番茄幼苗植株的生长,降低了幼苗的单株鲜重,减少了果实产量,但可以提高果实可溶性糖含量.同一盐胁迫条件下,不同番茄品种性状存在显著差异.  相似文献   

无机水合盐热反应体系的研究     

方娴 《昭通师范高等专科学校学报》2003,25(2):31-37

在无机盐的热反应体系热力学分析的基础上，对筛选出的具有中低温下无机水合盐热反应体系进行了正逆向剩定分析，并通过TG和DTA方法对其反应热作了定量分析和相应的动力学研究．  相似文献   

EDTA配位滴定法测定热处理盐浴中的氯化钡     

梁保安 《许昌学院学报》2001,20(2):74-76

研究了用EDTA配位滴定法,结合反滴定方式测定NaCl-BaCl2混合盐中的BaCl2时的相关问题.对照试验的结果表明,该方法测定BaCl2的结果准确、可靠.  相似文献   

甲基橙褪色光度法测定加碘盐中微量碘     

余建平  林燕 《赣南师范学院学报》2005,26(6):49-50

基于硫酸介质中,在溴化钾催化作用下,碘酸根氧化甲基橙褪色作用,据此建立了测定碘的动力学光度法.结果表明,最大吸收波长为507 nm时,碘酸钾浓度在0~1.6 mg/L内呈线性关系,表观摩尔吸收系数为9.17×104L.mol-1cm-1.方法用于加碘盐中碘(V)的测定,结果令人满意.  相似文献