Search

为探究低温预处理技术对植物油品质的影响，以油菜籽、亚麻籽、花生、葵花籽、芝麻为原料，进行超声波和真空冷冻干燥预处理，采用螺旋榨油机压榨制油，分析植物油感官指标（色泽、气味、黏度、透明度、滋味）、理化指标（酸值、过氧化值、色泽、水分及挥发物）、营养组分（脂肪酸、甘油三酯、总酚、维生素E）及挥发性组分的变化。结果表明：经超声波预处理，植物油的透明度、滋味和气味较好，而真空冷冻干燥预处理植物油的黏度、气味和滋味与未处理组相比变化不明显；经2种方式预处理后，5种植物油的酸值和过氧化值均符合食品安全国家标准，脂肪酸和甘油三酯组成及含量无显著性变化（p＞0.05），但挥发性成分有明显变化；经真空冷冻干燥和超声波预处理，除超声波预处理葵花籽油外，植物油中总酚含量分别是未处理组的1.04~1.90倍和1.10~1.55倍，除菜籽油外，植物油中维生素E含量分别比未处理组增加了0.50%~26.56%和1.40%~49.99%。总体而言，超声波和真空冷冻干燥预处理不会造成植物油感官品质、脂肪酸和甘油三酯含量的下降，且能提高微量营养组分的含量，获得综合品质较好的植物油。In order to investigate the effect of low-temprerature pretreatment technology on the quality of vegetable oils, rapeseed, flaxseed, peanut, sunflower seed and sesame were used as raw materials, they were pretreated with ultrasonic and vacuum freeze-drying, the oil was extracted by screw press, and the changes of sensory indexes (colour, odour, viscosity, transparency, taste), physicochemical indexes (acid value, peroxide value, colour, moisture and volatile compounds), nutritional components (fatty acids, triglycerides, total phenols, vitamin E) and volatile components of vegetable oils were analyzed. The results showed that the transparency, taste and odour of the vegetable oils were better after ultrasonic pretreatment, while the viscosity, odour and taste of the vacuum freeze-drying pretreated vegetable oils did not change significantly compared with those of untreated group. The acid value and peroxide value of the five vegetable oils after the two pretreatments complied with the national standards for food safety, and there were no significant changes in the fatty acid and triglyceride composition and content (p>005), but there were significant changes in the volatile compounds. After vacuum freeze-drying and ultrasonic pretreatment, the total phenol content of vegetable oils, except ultrasonic pretreated sunflower seed oil, was 1.04-1.90 times and 1.10-1.55 times that of the untreated group, respectively; and the vitamin E content of vegetable oils, except rapeseed oil, was increased by 0.50%-26.56% and 1.40%-4999%, respectively, compared with that of the untreated group. In general, ultrasonic and vacuum freeze-drying pretreatment don′t cause the decrease of sensory quality, fatty acid and triglyceride content of vegetable oils, and increase the content of micronutrient components to obtain vegetable oil with better comprehensive quality.

Copyright of Basic & Clinical Medicine is the property of Editorial Office of Basic & Clinical Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Railway Science & Engineering is the property of Journal of Railway Science & Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Oncology Prevention & Treatment is the property of Editorial Department of Chinese Journal of Oncology Prevention & Treatment and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Education Research (1680-6360) is the property of Angle Publishing Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

为了研究焙炒对植物油品质的影响，以油菜籽、亚麻籽、花生、葵花籽和芝麻为原料，经焙炒处理后采用液压压榨法制油（热榨油），分析植物油的理化指标（酸值、过氧化值、水分及挥发物、色泽）、主体组分（脂肪酸组成及含量、甘三酯组成及含量、挥发性组分）和总酚含量，并与未焙炒处理直接压榨制取的油（冷榨油）作对比。结果表明：热榨油酸值和过氧化值显著高于冷榨油（p0.05）；热榨油中醇类、醛类和酸类等挥发性组分较少，但杂环类物质较多；热榨菜籽油、亚麻籽油、花生油、葵花籽油和芝麻油总酚含量分别是其冷榨油的1.38、1.57、1.51、1.80倍和1.27倍。因此，焙炒对植物油品质影响较大，应根据生产需要选择合适的预处理方式。 In order to study the effect of roasting on the quality of vegetable oils, rapeseed, flaxseed, peanut, sunflower seed and sesame were used as raw materials, and the oils were obtained by hydraulic pressing after roasting(hot pressed oil). The physicochemical indexes (acid value, peroxide value, moisture and volatile, color), main components (fatty acid composition and content, triglyceride composition and content, volatile components) and total phenols of the five hot pressed vegetable oils were analyzed and compared with those of the oils direct pressed with unroasted oilseeds(cold pressed oil). The results showed that the acid value and peroxide value of hot pressed oils were significantly higher than those of cold pressed oils (p0.05). The hot pressed oils contained less volatile components, such as alcohols, aldehydes and acids, but more heterocyclic substances. The contents of total phenols in hot pressed rapeseed oil, flaxseed oil, peanut oil, sunflower seed oil and sesame oil were 1.38, 1.57, 1.51, 1.80, 1.27 times of the cold pressed oil, respectively. Therefore, roasting has a great influence on the quality of vegetable oil, and an appropriate pretreatment method should be selected according to production needs.

利用高效液相色谱-蒸发光散射检测器（HPLC-ELSD）法对青海亚麻籽油中的甘三酯（TAG）组分进行了定性、定量研究，并运用中药色谱指纹图谱相似度评价系统建立其TAG标准指纹图谱，利用指纹图谱鉴别掺入5%~50%的大豆油、玉米油、菜籽油、花生油、葵花籽油、芝麻油的掺伪模型。结果表明：亚麻籽油中主要的TAG为OLnLn（29.40%）、LnLnLn（23.71%）、OLnO（15.10%）、OLLn（13.43%）、LLnLn（13.32%）；指纹图谱鉴别结果与真实掺伪量的相对误差表明所建立的指纹图谱可以较好地鉴别掺入5%~50%的大豆油、葵花籽油、芝麻油的掺伪模型，对花生油掺伪量10%的掺伪模型的鉴别相对误差较高（9.15%），未能实现对菜籽油掺伪量5%掺伪模型的鉴别。试验构建的青海亚麻籽油TAG指纹图谱可为青海省亚麻籽油质量监控和掺伪识别提供理论依据。The triglyceride (TAG) components in Qinghai flaxseed oil were determined qualitatively and quantitatively by HPLC-ELSD, and the standard TAG fingerprint was established by the similarity evaluation system of traditional Chinese medicine chromatographic fingerprint. The fingerprint constructed was used to identify the adulteration model of soybean oil, corn oil, rapeseed oil, peanut oil, sunflower seed oil and sesame oil with adulteration amount 5%-50%. The results showed that the main TAGs in Qinghai flaxseed oil were OLnLn (29.40%), LnLnLn (23.71%), OLnO (15.10%), OLLn (13.43%), LLnLn (13.32%).The relative error between the identification result and the true adulteration amount showed that the fingerprint constructed could identify the adulteration models of soybean oil, sunflower seed oil and sesame oil with adulteration amount 5%-50%, and the relative error for the 10% peanut oil adulteration model was relatively high (915%), and the identification of the 5% rapeseed oil adulteration model could not be realized. The TAG fingerprint of Qinghai flaxseed oil constructed provides a theoretical basis for quality control and adulteration identification of Qinghai flaxseed oil.