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Characterizations of Drinking Water Quality for Populations of Hann Bel-Air (Dakar, Senegal)
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作者 Alassane Thiam Amadou Babacar Sarr Serigne Modou Sarr 《Journal of Water Resource and Protection》 2020年第10期898-909,共12页
Populations of Hann Bel-Air municipality are supplied with drinking water from taps water of “Sénégalaise Des Eaux” (SDE) and Jambar pumps which capturie directly the groundwater. This municipality is char... Populations of Hann Bel-Air municipality are supplied with drinking water from taps water of “Sénégalaise Des Eaux” (SDE) and Jambar pumps which capturie directly the groundwater. This municipality is characterized by a strong environmental pollution which can affect the quality of drinking water. To determine actual quality of that water, 10 samples were taken and analyzed. Physico-chemical results have shown that tap water is more suitable for domestic consumption than Jambar pump water. The results show that physical parameters such as electrical conductivity (maximum value of 2671 μS/cm) exceed World Health Organization standard. The pH of the water from Jambar pumps is between 6.04 and 6.09, which demonstrates the aggressive character of that water. For tap water, pH values of 7.03 to 7.09 demonstrate their alkalinity. For chemical analyses, bicarbonates and sulphates concentrations respectively meet World Health Organization standards. Tap water meets World Health Organization standard for nitrates. With respect to chloride, the threshold of 250 mg/L is exceeded at all levels, but we note that high chloride concentrations are part of the exemptions granted to SDE. Tap water and water from water table have concentrations of calcium, potassium, iron and magnesium irreproachable. For sodium, EP3, EP4 and P5 samples from the web exceed World Health Organization standard with a peak of 310.27 mg/L. Tap water is more drinkable than groundwater but its quality needs to be improved and especially controlled for the well-being and sustainable health of consumers. 展开更多
关键词 Hann bel-air Water Resources Physico-Chemical Analyses Quality
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Ch■teau Bel-Air
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《明日风尚》 2007年第3期76-76,共1页
年份:2003产地:法国波尔多Pomerol售价:$380法国波尔多有两个Ch■teau Lagrange,一个在Saint-Julien,一个在Pomerol,主人不同,酒质酒味酒价也完全两样。是否觉得很混乱?不过,相比Ch■teau Bel-Air,这个两生花故事只是小巫。
关键词 法国波尔多 酒质 CH teau bel-air 小巫 SAINT 甘巴 加速氧化 连字符 巫法
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对戏曲发声和美声唱法的探讨 被引量:1
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作者 陈冉 《洛阳师范学院学报》 2011年第10期109-112,共4页
戏曲发声与美声唱法在很多方面是相通的。基于戏曲发声的特性,将其与美声唱法进行比较研究,分析科学发声的原理及与京剧发声的关系,了解掌握气息的原理与运用,正确稳定喉头的位置,体腔调节与运用等。在训练戏曲演员时可以借鉴美声训练方... 戏曲发声与美声唱法在很多方面是相通的。基于戏曲发声的特性,将其与美声唱法进行比较研究,分析科学发声的原理及与京剧发声的关系,了解掌握气息的原理与运用,正确稳定喉头的位置,体腔调节与运用等。在训练戏曲演员时可以借鉴美声训练方法,对旦角学生剧目中的唱段进行发声指导,针对僵化模仿、呼吸偏误、无准备发声、真假声不能自如运用等七种弊病进行指导练习,以期在保护戏曲发声特点本体的同时,将科学发声方法为我所用,促进戏曲艺术的进步与发展。 展开更多
关键词 戏曲发声 美声唱法 科学训练方法 呼吸偏误 气滞音结 僵化模仿
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