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乳制饮品脂肪酸测定中不同提取方法的对比
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作者 吴欢 《中国食品工业》 2020年第12期34-37,共4页
本文研究了固相萃取浓缩净化-气相色谱检测法(GC)测定乳与乳制饮品中C18H34O2(游离脂肪酸)含量。样品利用石油醚-乙醚萃取法(第一法)及叔丁基甲醚-正己烷萃取法(第二法)两种前处理方法进行脂肪酸的提取,固相萃取柱进一步净化,使用氢氧... 本文研究了固相萃取浓缩净化-气相色谱检测法(GC)测定乳与乳制饮品中C18H34O2(游离脂肪酸)含量。样品利用石油醚-乙醚萃取法(第一法)及叔丁基甲醚-正己烷萃取法(第二法)两种前处理方法进行脂肪酸的提取,固相萃取柱进一步净化,使用氢氧化钾甲醇酯化,应用气相色谱法-氢火焰离子化检测器(FID)测定。结果显示,在0.01mg/mL〜0.04mg/mL浓度范围内,峰面积与浓度呈良好线性关系,rA 0.999。在0.005.0.01.0.02mg/mL添加水平,第一法样品平均回收率为87.20%〜107.10%,相对标准偏差为2.22〜4.00,第二法样品平均回收率为85.6%〜97.1%,相对标准偏差为2.38〜5.00,回收率比第一法略低。研究表明,二种方法均适用于乳制饮品中游离脂肪酸的测定,具有快速、定量准确、检测灵敏等优点。 展开更多
关键词 乳制饮品 脂肪酸 测定方法 对比
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《乳品与人类》 2004年第2期5-5,共1页
20万吨 云南牛奶产业正呈现高速发展之势,2003年云南省奶牛存栏突破13万头,其中能繁母牛占61%,使云南省牛奶产量突破20万吨,达21.75万吨,比上年增24.15%,增幅比上年提高11.78个百分点,牛奶生产持续高速发展,已成为云南省畜牧业生产的... 20万吨 云南牛奶产业正呈现高速发展之势,2003年云南省奶牛存栏突破13万头,其中能繁母牛占61%,使云南省牛奶产量突破20万吨,达21.75万吨,比上年增24.15%,增幅比上年提高11.78个百分点,牛奶生产持续高速发展,已成为云南省畜牧业生产的一大亮点。 展开更多
关键词 品市场 2004年 云南 畜牧业生产 产量 质量监督 乳制饮品
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Dietary and socio-economic factors in relation to Helicobacter pylori re-infection 被引量:6
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作者 Mirosaw Jarosz Ewa Rychlik +6 位作者 Magdalena Siuba Wioleta Respondek Magorzata Ryzko-Skiba Iwona Sajór Sylwia Gugaa Tomasz Bazejczyk Janusz Ciok 《World Journal of Gastroenterology》 SCIE CAS CSCD 2009年第9期1119-1125,共7页
AIM:To examine if dietary and socio-economic factors contribute to Helicobacter pylori(H pylori)re-infection. METHODS:The population of patients consisted of subjects in whom H pylori infection had been successfully t... AIM:To examine if dietary and socio-economic factors contribute to Helicobacter pylori(H pylori)re-infection. METHODS:The population of patients consisted of subjects in whom H pylori infection had been successfully treated in the past.Patients were divided into two groups:Ⅰ-examined group(111 persons with H pylori re-infection)andⅡ-control group(175 persons who had not been re-infected).The respondents were interviewed retrospectively on their dietary habits and socio-economic factors. RESULTS:A statistically significant lower frequency of fermented dairy products(P<0.0001),vegetables (P=0.02),and fruit(P=0.008)consumption was noted among patients with H pylori re-infection as compared to those who had not been re-infected. CONCLUSION:High dietary intake of probiotic bacteria,mainly Lactobacillus,and antioxidants,mainly vitamin C(contained in fruit and vegetables),might decrease the risk of H pylori re-infection. 展开更多
关键词 NUTRITION PROBIOTICS Helicobacter pylori re-infection Vitamin C Lifestyle factors
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The Consumption Preferences of Milk and Dairy Products of Undergraduate Students
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作者 Mustafa Mortas Fehmi YaZlCl 《Journal of Food Science and Engineering》 2012年第1期10-14,共5页
Human has different stages in their life as from babyhood to adult. The healthy and balanced diet preferences of people play an important role in each human life parts. Especially milk and dairy products are necessary... Human has different stages in their life as from babyhood to adult. The healthy and balanced diet preferences of people play an important role in each human life parts. Especially milk and dairy products are necessary for human health because of their nutrition value and body functions. One of the parts of people life is university life. Starting university is a turning point in terms of eating habits, since food choices responsibility of university students increases in this period. According to the researches, increasing availability of fast foods, changes in living arrangements, life experiences, expectations, preferences and beliefs related with food selections are most common reasons regarding dietary choices in this young adults group. University students had drinking milk habits in primary school but most of them lose their habits during university life. The students' first preferences were cheese and then yogurt and finally milk. A very little part of university students consume milk and dairy products regularly. The consumption habits and milk and dairy product catering of university students were examined. The consumption preferences of milk and dairy products of the students in different Universities are reviewed in this review. 展开更多
关键词 MILK dairy products consumption preferences undergraduate students.
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