کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2420452 | 1552462 | 2009 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of post-harvest treatments on concentrations and profile of fatty acids in fresh perennial ryegrass (Lolium perenne L.)
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کلمات کلیدی
NDIFatty acids - اسیدهای چربImproved - بهبود یافتهFresh - تازهStorage - ذخیره سازیFrozen storage - ذخیره سازی منجمدLolium perenne L. - زنده ماندن L.Polar lipid - لیپید قطبیPlant lipids - لیپید های گیاهیdry matter - ماده خشکFAME یا fatty acid methyl esters - متیل استرهای اسید چربfatty acid methyl esters - متیل استرهای اسید چربSample collection - مجموعه نمونهGas chromatography - کروماتوگرافی گازیDry ice - یخ خشک
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Plant lipids are complex, polar and highly unsaturated constituents of membranes. During collection and/or handling of a plant sample, the membrane integrity gets lost due to plant injury and losses of fatty acids (FA) can occur as a result of oxidative or enzymatic processes. Quantitative and qualitative effects of various post-harvest treatments on the concentrations and proportions of FA in herbage are not well known. In this study, effects of various post-harvest treatments regarding conditions following sample collection of perennial ryegrass were examined. The handling of the samples, before applying all pre-treatments, was uniform, i.e., all samples were put in a cooling box at 4 °C and transported to the lab for approximately 30 min. The moment when the samples arrived to the lab was considered “time zero”, and the applications of treatments started. We studied effects of two ways of sample handling (dry ice vs. no dry ice), two frozen storage temperatures (â80 °C vs. â18 °C) and two durations of frozen storage (1 day vs. 2 weeks) on concentrations and proportions of FA in cut herbage. The effects of the treatments appeared to be small and inconsistent, with exception of prolonged storage, which decreased FA concentrations, and increased the proportion of α-linolenic acid (C18:3). Contrary to expectation, using dry ice (rapid freezing) did not differ from slow freezing (without dry ice). Also, there were no effects of storage temperature (â80 or â18 °C). Future research questions are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 149, Issues 1â2, 2 March 2009, Pages 60-69
Journal: Animal Feed Science and Technology - Volume 149, Issues 1â2, 2 March 2009, Pages 60-69
نویسندگان
I.M. Witkowska, A.C. Wever, A. Elgersma,