{"id":5322,"date":"2024-08-04T18:21:04","date_gmt":"2024-08-04T18:21:04","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=5322"},"modified":"2024-08-04T18:21:04","modified_gmt":"2024-08-04T18:21:04","slug":"tamarindus-indica-linn","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/da\/tamarindus-indica-linn\/","title":{"rendered":"Flavonoider fra den ydre skal af sure sojab\u00f8nner og evaluering af deres antioxidantaktivitet"},"content":{"rendered":"

Flavonoider fra den ydre skal af sure sojab\u00f8nner og evaluering af deres antioxidantaktivitet
\nTamarinus indica Linn. er en b\u00e6lgplante, hvis frugt ogs\u00e5 er kendt som Luo Huang Zi, Sour Horn, Sweet Horn, Luo Wang Zi osv. Den stammer fra Afrika og dyrkes nu i forskellige tropiske omr\u00e5der. Den findes ofte i Taiwan, Fujian, Guangdong, Guangxi, det sydlige, centrale og nordlige Yunnan (Jinsha River Valley). Sure b\u00f8nner har en lang historie med medicinsk brug. I \"Compendium of Materia Medica\" st\u00e5r der, at \"Luo Huang Zi ... behandler v\u00e6kst af insekter i organerne og mavesmerter for\u00e5rsaget af b\u00f8rn, der spiser jord\"; i \"Dian Nan Ben Cao\" st\u00e5r der, at \"sure dumplings ... behandler omdannelsen af vin til slim og isolerer det i maven\". Sure b\u00f8nner indeholder forskellige strukturelle typer af stoffer som flavonoider, anthocyaniner, oligomere anthocyaniner, terpener, polysaccharider og organiske syrer, som har biologiske aktiviteter som antioxidant, anti-inflammatorisk, anti-aging og blodtrykss\u00e6nkende.<\/p>\n

I de senere \u00e5r har der v\u00e6ret en stigende m\u00e6ngde forskning i blomster, blade, frugter og fr\u00f8 af sure b\u00f8nner b\u00e5de herhjemme og internationalt. Men der findes kun f\u00e5 rapporter om sammens\u00e6tningen og aktiviteten af de sure b\u00f8nners ydre skal. For at klarl\u00e6gge sammens\u00e6tningen og antioxidantaktiviteten af de sure b\u00f8nners ydre hud unders\u00f8gte dette eksperiment den kemiske sammens\u00e6tning og antioxidantaktiviteten af acetoneekstrakt fra de sure b\u00f8nners ydre hud for at skabe et videnskabeligt grundlag for den efterf\u00f8lgende medicinske behandling og udvikling af de sure b\u00f8nner.<\/p>\n

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Sure b\u00f8nner indeholder forskellige strukturelle typer af stoffer som flavonoider, organiske syrer, anthocyaniner, oligomere anthocyaniner, polysaccharider og terpener. Men de sure b\u00f8nners ydre skal bliver ofte overset som et biprodukt af f\u00f8devareforarbejdningen. I dette eksperiment blev i alt 18 flavonoidforbindelser isoleret fra det ydre skind af sure b\u00f8nner, herunder 6 flavonoider (1-5, 9), 2 flavonoler (7, 8), 5 dihydroflavonoider (10-12, 14, 15), 2 dihydroflavonoler (13, 16), 2 flavanoler (17, 18) og et flavonoidglykosid (6). Blandt dem blev 10 forbindelser (2, 4-6, 9, 11, 13-16) isoleret fra denne plantesl\u00e6gt for f\u00f8rste gang, hvilket indikerer, at den ydre hud af sure b\u00f8nner indeholder en stor m\u00e6ngde flavonoider, hvilket er i overensstemmelse med den store m\u00e6ngde komponenter, der findes i sure b\u00f8nner. Resultaterne af ORAC-eksperimentet viste, at acetoneekstrakt, dichlormethanekstrakt, ethylacetatekstrakt, n-butanolekstrakt og 9 forbindelser (1, 2, 7-10, 12, 13, 17) fra de sure b\u00f8nners ydre hud alle havde god in vitro-antioxidantaktivitet.
\nFlavonoiders antioxidantaktivitet er t\u00e6t forbundet med deres struktur, og antallet og placeringen af hydroxylgrupper samt tilstedev\u00e6relsen af carbonylgrupper i C-ringen har alle en vis indvirkning p\u00e5 flavonoiders antioxidantaktivitet. P\u00e5 grund af de phenoliske hydroxylgruppers direkte involvering i fjernelse af frie radikaler spiller m\u00e6ngden af substitution af phenoliske hydroxylgrupper en vigtig rolle i flavonoidernes antioxidanteffekt. Fors\u00f8gsresultaterne viste, at ORAC-v\u00e6rdien for dihydrokaempferol i dihydroflavonoidtypen var h\u00f8jere end for naringenin, og quercetin var h\u00f8jere end andre flavonoidtyper som luteolin og kaempferol. Man kan se, at jo flere hydroxylgrupper der er, jo st\u00e6rkere er forbindelsens antioxidantkapacitet. Forskning har vist, at det vigtigste sted for flavonoiders antioxidantaktivitet er substitutionen af hydroxylgrupper i B-ringen, hvor den phenoliske hydroxylgruppe, der st\u00f8der op til B-ringen, har den st\u00e6rkeste aktivitet. Dette f\u00e6nomen kan skyldes, at den tilst\u00f8dende phenoliske hydroxylgruppe p\u00e5 B-ringen er mere modtagelig for elektronangreb. Eksperimentelle resultater viser, at antallet af hydroxylgrupper i magnolol og kaempferol er det samme, men magnolols ORAC-v\u00e6rdi er h\u00f8jere. Det spekuleres i, at B-ringens hydroxylgruppe kan have mere antioxidantaktivitet end A-ringens hydroxylgruppe, og dens tilst\u00f8dende phenoliske hydroxylgruppe spiller en vigtig rolle; Dobbeltbindinger er elektronudtr\u00e6kkende grupper, og deres induktionseffekt kan reducere flavonoidernes antioxidantkapacitet. Tilstedev\u00e6relsen af dobbeltbindinger kan ogs\u00e5 forl\u00e6nge det konjugerede system af flavonoider, \u00f8ge stabiliteten af frie radikaler og forbedre antioxidantaktiviteten; De eksperimentelle resultater viste, at n\u00e5r substituenterne er de samme, er ORAC-v\u00e6rdien af dihydrokaempferol st\u00f8rre end kaempferol, mens ORAC-v\u00e6rdien af purpurin er st\u00f8rre end 7,3 ', 4' - trihydroxyflavone. Det kan ses, at indflydelsen af tilstedev\u00e6relsen af C-ring-dobbeltbindinger p\u00e5 dens antioxidantaktivitet stadig skal unders\u00f8ges; ORAC-v\u00e6rdien af dihydrokaempferol er betydeligt h\u00f8jere end catechiner, hvilket indikerer, at tilstedev\u00e6relsen af 4-carbonylgruppen har en vis fremmende effekt p\u00e5 antioxidantaktiviteten. Dette eksperiment analyserede de antioxidative virkninger af nogle flavonoider og forholdet mellem deres strukturer og verificerede de relevante konklusioner om indvirkningen af ovenn\u00e6vnte strukturer p\u00e5 styrken af antioxidantkapaciteten.<\/p>","protected":false},"excerpt":{"rendered":"

Flavonoids from the outer skin of sour soybean and their antioxidant activity evaluation Tamarinus indica Linn. is a leguminous plant, whose fruit is also known as Luo Huang Zi, Sour Horn, Sweet Horn, Luo Wang Zi, etc. It is native to Africa and is now cultivated in various tropical regions. Commonly found in Taiwan, Fujian, […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"yoast_head":"\nFlavonoids from the outer skin of sour soybean and their antioxidant activity evaluation - China Chemical Manufacturer<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangextracts.com\/da\/tamarindus-indica-linn\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flavonoids from the outer skin of sour soybean and their antioxidant activity evaluation - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"Flavonoids from the outer skin of sour soybean and their antioxidant activity evaluation Tamarinus indica Linn. is a leguminous plant, whose fruit is also known as Luo Huang Zi, Sour Horn, Sweet Horn, Luo Wang Zi, etc. It is native to Africa and is now cultivated in various tropical regions. 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