tailieunhanh - Báo cáo khoa học " Effect of selenium enrichment on antioxidant activities and chemical composition of Lentinula edodes (Berk.) Pegl. mycelial extracts "

Preparations derived from Lentinula edodes (Berk.) Pegl. mycelium are worldwide used as dietary supplements containing compounds active as immune system enhancers, demonstrating chemopreventive and anticancer activity. L. edodes mycelium enriched with organic forms of selenium like selenized yeast possess putative, higher cancer preventive properties. The objective of this study was to test the effect of enrichment in selenium on antioxidant, reducing and free radical scavenging activity of water and alcohol extracts from mycelium of L. edodes (Berk.). To elucidate the cause of enhanced antioxidant activity of extracts, a preliminary selenium speciation by specific oxido-reduction reaction was performed | Food and Chemical Toxicology 48 2010 1085-1091 ELSEVIER Contents lists available at ScienceDirect Food and Chemical Toxicology journal homepage locate foodchemtox Effect of selenium enrichment on antioxidant activities and chemical composition of Lentinula edodes Berk. Pegl. mycelial extracts Jadwiga Turlo Bozenna Gutkowska Franciszek Herold Department of Drug Technology Medical University of Warsaw Banacha 1 St. 02-097 Warsaw Poland ARTICLE INFO ABSTRACT Article history Received 10 August 2009 Accepted 29 January 2010 Keywords Lentinula edodes Antioxidant activities Selenium Phenolics Free radicals Preparations derived from Lentinula edodes Berk. Pegl. mycelium are worldwide used as dietary supplements containing compounds active as immune system enhancers demonstrating chemopreventive and anticancer activity. L. edodes mycelium enriched with organic forms of selenium like selenized yeast possess putative higher cancer preventive properties. The objective of this study was to test the effect of enrichment in selenium on antioxidant reducing and free radical scavenging activity of water and alcohol extracts from mycelium of L. edodes Berk. . To elucidate the cause of enhanced antioxidant activity of extracts a preliminary selenium speciation by specific oxido-reduction reaction was performed. Se-enrichment enhanced antioxidant activity reducing power and free radical scavenging effect of mycelial extracts by almost 100-400 . Increase of activity was particularly high for diluted extracts concentrations mg ml . The chemical composition of extracts from both Se-enriched and non-enriched mycelium was compared by determination of polyphenols proteins carbohydrates and lipids. Results showed that Se-enrichment enhanced antioxidant activities of mycelial extracts likely by high amounts of organic Se-compounds -II oxidation state and elemental red selenium and by increased polyphenols content. Our results suggest that Se-enrichment is a good .

• Báo cáo khoa học
• Lentinula edodes
• Antioxidant activities
• Selenium
• Phenolics
• Free radicals
• Food
• Chemical Toxicology
• Saccharomyces cerevisiae
• PCRRFLP and SDSPAGE
• Saccharomyces cerevisiae and Lentinula edodes
• Region based diversity studies
• Biocontrol
• Cryptococcus laurentii
• Penicillium expansum
• Patulin Oxidative stress
• Food Microbiology
• Cancer
• Cytotoxic
• Cytostatic
• Antitumour
• Mitogenic
• comitogenic activity
• Supercritical fluid extraction
• Shiitake
• Antioxidant
• Antimicrobial
• Organic solvent extraction
• Food Engineering
• Shiitake mushroom
• Sorghum meal agar
• Pearl millet meal agar
• Wheat meal agar
• Potato dextrose agar
• Sorghum straw
• Pearl millet straw
• Wheat straw
• Saw dust
• Schizophyllum commune
• Physiological studies
• Culture media
• Wild mushroom specimens of Schizophyllum commune
• Mẫu nấm Hương Sapa
• Thân cây lá rộng mục
• Công nghệ nuôi trồng nấm Hương
• Điều kiện nuôi trồng nhân tạo
• BMC Genomics
• Brown film
• Cell wall degradation
• Fruit body
• Light sensing
• Nghiên cứu sự phân hóa sinh địa học
• Sự phân hóa sinh địa học
• Sinh địa học của nấm hương
• Bạch kim hương
• Lentinula Platinedodes sp nov
• Structural characterization
• immunoenhancing properties
• hybrid mushroom
• Pleurotus florida
• Chitin
• Pileus
• Stipe
• Agaricus bisporus
• Pleurotus ostreatus
• Chitosan glucose complex
• Microbiological quality
• Sensory evaluation
• Storage life
• Lentinus edodes
• Antibiotic resistance
• Herbal remedy
• Pseudomonas aeruginosa
• Cystic fibrosis
• Clinical Practice
• Nutrients
• Volatiles
• Aroma
• Compounds
• Flush terms
• Clinical Methods
• Isolation
• composition analysis
• antioxidant activity
• cytotoxicity
• selenium enriched
• mycelial cultures
• Luận án Tiến sĩ Hóa học
• Hoạt tính kháng u
• Điều biến miễn dịch
• Nấm hầu thủ
• Hericium erinaceus
• Nấm hương
• Tóm tắt Luận án Tiến sĩ
• Luận án Tiến sĩ
• Hóa hợp chất thiên nhiên
• Công dụng nấm hầu thủ
• Công dụng nấm hương
• Luận văn Thạc sĩ
• Luận văn Thạc sĩ Hoá học
• Hoá phân tích
• Hợp chất trong nấm hương
• Giá trị nấm hương
• Lên men lactic
• Nấm đông cô
• Nem chua nấm đông cô
• Vi khuẩn lactic
• Chủng vi khuẩn lactic
• Phát triển sản phẩm nem chua
• Carbohydrate polymers
• β Glucans
• α Glucans
• Anti inflammatory
• Fluorimetric determinations