Abstract：
Objective- To determine the total alkaloid in 10 batches of Maca samples from different regions by adopting the acid dye colorimetric method, and to evaluate the maca quality of different regions.
Methodology - By using Oxymatrine as a reference substance, UV-VIS spectrophotometry was adopted to determine the total alkaloid contents, and the extraction method, the dosage of chromogenic agent, pH values, the measured wavelengths were observed, and the total alkaloid of maca from different regions were determined.
Result - 3 extractions were conducted by applying the method of ultrasonic extraction, and with 6 ml of chromogenic agent, 7.2 pH value, 415nm measured wavelength, the total alkaloid in the maca samples were found to be relatively high,
and the three best maca quality regions were Peru, Lijiang and Diqing.
Conclusion - It was found that the advantages of using this method to determine the total alkaloid in maca and evaluate the quality were simple operation, high detection sensitivity and good reproducibility.
Art song "red bean word" word from the qing dynasty famous writer cao xueqin's book, one of the four great classical novels, a dream of red mansions later by famous composer Liu Xuean composition adapted from a Chinese art song. This is a song with Chinese traditional thought of art, appearing in the beautiful sadness. This song will be the western music composing techniques combined with traditional Chinese national music style, express the artistic conception of poetry implied in music, the aesthetic taste of traditional Chinese national music and the embodiment of the aesthetic consciousness and perfect. Fused together because of the lyrics, the song red bean word become the classic in the traditional Chinese art song. It consists of the last century 30 s dating
Acclaimed, and to give the later music creation of ancient Chinese poems with far-reaching influence.
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急求英语翻译高手帮忙翻译一下论文的摘要,谢谢 - ******
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[求助]请英语爱好者帮我翻译一段中文这是我毕设论文的摘要,摘要需要翻译成中文,请朋友们帮帮忙,小弟在这里先谢谢了.是需要把中文翻译成英文,上面... - ******
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#岑宰#In this paper, 2013 1~5 month Xi'an City air SO2, NO2, PM10 and PM2.5 pollutants statistical data as the basis, the grey relational analysis of grey system theory is applied to assess the air quality in Xi'an City, and establish GM by using grey ...
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论文摘要英文翻译,请求帮助,要准确,谢谢,可提高悬赏! ******
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求组,论文的摘要翻译成英文.非常急~ 谢谢各位大哥大姐. - ******
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求论文摘要的翻译,汉译英~先谢谢了. ******
#岑宰# 1951~2000 year temperature materials provides which according to Kaifeng Meteorological bureau and ＂the Kaifeng Yearbook 2009＂ provides all previous years grain data material, uses accumulation anomalous method, the linear tendency ...
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#岑宰# Abstract : Enterprise Financial Risk, as an objective fact, exist in the production and operation of enterprises in all sectors, financial risk to more fully reflect the business conditions, business should strengthen financial management and Regular ...
