دانلود رایگان مقاله انگلیسی ارزیابی ترکیبات فنولیک phenolic compounds در نمونه های بیولوژیکی به همراه ترجمه فارسی
عنوان فارسی مقاله: | ارزیابی ترکیبات فنولیک phenolic compounds در نمونه های بیولوژیکی |
عنوان انگلیسی مقاله: | Assessment of phenolic compounds in biological samples |
رشته های مرتبط: | شیمی، شیمی تجزیه، شیمی آلی، شیمی محیط زیست |
فرمت مقالات رایگان | مقالات انگلیسی و ترجمه های فارسی رایگان با فرمت PDF میباشند |
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توضیحات | ترجمه این مقاله به صورت خلاصه انجام شده است و ترجمه بعضی بخش ها موجود نیست. |
کد محصول | f273 |
مقاله انگلیسی رایگان |
دانلود رایگان مقاله انگلیسی |
ترجمه فارسی رایگان |
دانلود رایگان ترجمه مقاله |
جستجوی ترجمه مقالات | جستجوی ترجمه مقالات شیمی |
بخشی از ترجمه فارسی مقاله: بصورت خلاصه فرایند های , استخراج , خالص سازی , تصفیه سازی برای تحلیل ترکیبات فنولیک ( آنتوسیانین , فلاونوئید ,کاتچین و اسید فنولیک )در سیالهاو ارگانهای بیولوژیکی حیوانات و انسان مورد استفاده قرار میگیرند . علاقه بوجود آمده در خصوص ظرفیت انتی اکسیدانی این عناصر در میوه ها و سبزیجات , این فرایند ها را به عنوان ابزاری با ارزش , قبل از جداسازی و شناسایی ترکیبات و متابولیت آنها که در این ارگانیزم,مبدل ساخته است. در نهایت تکنیکهای کروماتوگرافی و اسپکتروفتومتری به منظور جداسازی و شناسائی آنها بصورت خلاصه مورد بررسی قرار گرفته است. |
بخشی از مقاله انگلیسی: Summary A short review of extraction, purification and cleanup procedures for the analysis of phenolic compounds (anthocyanins, flavonoids, catechins, phenolic acids, etc.) in animal and human biological fluids and organs is presented. The rising interest about the antioxidant capacity of these widespread constituents of fruit and vegetables enables these procedures an invaluable tool prior of the separation and identification of these compounds and their metabolites occurring in the organism. Finally, the usual chromatographic and spectrophotometric analytical techniques for their separation and identification are briefly summarized. Key words: phenolic compounds, flavonoids, analysis, extraction, sample cleanup, biomatrices. INTRODUCTION Phenolic compounds include a large class of phytochemicals that are endowed with interesting biological properties. Among the most important are anthocyanins, flavonoids, catechins, phenolic acids, secoiridoids, stilbenes, coumarins and isoflavones which are widespread in vegetable crops such as fruits, vegetables, herbs, grains and seeds and derived foods such as juices, wines, oils, etc. [1, 2]. In recent years there have been many reports in the literature on the role of these natural compounds in counteracting the negative effects of oxygen and nitrogen reactive species (ROS/RNS), maintaining the redox homeostasis of biological fluids and preventing human disease such as cardiovascular diseases, atherosclerosis, and other degenerative pathologies such as cancer, diabetes, Alzheimer’s and Parkinson’s diseases [3, 4]. Biochemists have used several strategies to evaluate the antioxidative power of phenolic compounds and to determine the amounts of individual species in foods and beverages. Many methods have been used to measure the in vitro total phenolics, the individual phenolic contents and the total capacity of scavenging ROS/RNS and other free radicals. The information contained in these studies has contributed to understanding the significant role that phenol-rich foods play in maintaining a healthy lifestyle [5]. Various public institutions have published appropriate guidelines to encourage the consumption of food and beverages of vegetable origin. The in vitro analysis, however, does not measure the efficiency of these compounds in improving the defense of the human body against free radicals. Absorption, bioavailability, pharmacokinetics and metabolism of these compounds may greatly affect the efficacy of their action in vivo. There are literature reports on the actual amounts of these compounds or their metabolites in animal and human serum, plasma, blood, urine and body organs and the concentration levels of phenolic compounds in the fluids and tissues over time that are necessary to effectively protect human health [5]. The purpose of this paper is to present the specific procedures for the extraction, isolation and purification suitable for the analysis of phenolic compounds in animal and human biomatrices. |