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北京石油化工学院2026年研究生招生接收调剂公告
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xiehuaiyan

木虫 (小有名气)

[求助] 希望精确的翻译,谢谢啦

The main pigments found in vegetables are chlorophyll a, b and c. Chlorophyll a converts light energy into chemical energy through photosynthesis process. The content of chlorophyll pigments varies by species. The aim of the research was to determine simultaneously chlorophyll and carotene content from different vegetables by spectrophotometric method, testing three organic solvents to obtain
the best extraction solution. 17 samples of cherry tomatoes, peppers and cucumbers, collected from different greenhouses located in southern part of Romania were analyzed. The carotenoids and chlorophyll pigments extracted in methanol, diethyl ether and acetone, were determined based on the absorbance of        three wavelengths: 470 nm, 645 nm-653 nm and 662 nm-666 nm. The results were calculated according to the three "trichromatic equations" of Lichtentaler and Wellburn. The best extraction solvents for simultaneously determination of chlorophyll a and b and carotene were methanol and acetone. For cherry tomatoes and tomatoes the best extraction solvent was methanol for chlorophyll a and acetone for carotene. For peppers the best extraction solvent was acetone and for
cucumbers it was methanol. Variation coefficients were high, both between vegetable species and between tested varieties or hybrids.

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斜阳刘枫

木虫 (小有名气)

资深翻译 QQ:281793077


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爱与雨下: 金币+1 2013-07-29 19:12:51
xiehuaiyan: 金币+15, 翻译EPI+1, ★★★★★最佳答案, 最先完成,翻译的比较精确,谢谢! 2013-07-30 09:09:57
在蔬菜中发现的色素主要是叶绿素a,b和c。叶绿素a通过光合作用过程将光能转化为化学能。叶绿素色素的含量因种类而有所差异。研究的目的是用光谱分析法来同时确定不同蔬菜的叶绿素和胡萝卜素含量,测试三份有机溶剂以获得最佳的提取液。对取自罗马尼亚南部地区分布在不同位置大棚里的17份圣女果,辣椒和黄瓜样品进行了分析。在甲醇,二乙醚,丙酮里提取了类胡萝卜素和叶绿素色素,基于三个波长的吸光率被确定,三个波长是:470纳米,645纳米-653纳米以及662纳米-666纳米。根据Lichtentaler 和Wellburn的“三原色方程”进行计算得出结果。同时测定叶绿素a和b以及胡萝卜素的最佳的提取溶剂分别为甲醇和丙酮。对于圣女果和西红柿的最佳提取溶剂是甲醇来测定叶绿素a而丙酮测定胡萝卜素。对于辣椒的最佳提取溶剂是丙酮而黄瓜的最佳提取液是甲醇。在蔬菜品种之间以及参试品种或杂交品种之间的变异系数是很高的。 供参考,谢谢。

另外,楼主这金币真心少了吧,要精确还这么多,15金币,无语ing
2楼2013-07-29 12:12:56
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hyt0615

金虫 (初入文坛)

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爱与雨下: 金币+1 2013-07-29 19:13:00
蔬菜中的主要色素是叶绿素a,b和c。通过光合作用,叶绿素a将光能转化为化学能。叶绿素的含量因蔬菜种类而异。本研究目的是用分光光度法在不同的蔬菜中同时测定叶绿素和胡萝卜素含量,测试三种有机溶剂以获得最佳萃取液。对从罗马尼亚南部的蔬菜大棚里获得的樱桃西红柿,辣椒和黄瓜,共17个样品进行了分析。提取在甲醇,二乙醚,丙酮中的类胡萝卜素和叶绿素分别在470 nm,645 -653 nm和662-666 nm,三个波长条件下进行测定。结果计算是根据Lichtentaler and Wellburn的三个“三原色方程”。同时测定叶绿素a和b和胡萝卜素的最佳提取溶剂是甲醇和丙酮。对于樱桃西红柿和西红柿,测定叶绿素a的最佳提取溶剂是甲醇,胡萝卜素是丙酮。辣椒的最佳提取溶剂是丙酮,而黄瓜是甲醇。不同的蔬菜品种之间和不同的测试样品或者杂交品种之间,变异系数很高。
3楼2013-07-29 12:27:12
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