Qhov sib txawv tseem ceeb ntawm condensed hydrolysable thiab phlorotannins yog condensed tannins xa mus rau cov tebchaw uas tsim los ntawm condensation ntawm falvan thiab hydrolysable tannins xa mus rau cov tebchaw uas tawm los gallic thiab ellagic acids thaum cua sov nrog HCl los yog sulfuric acid whereas phlorotannins yog phloroglucinol.
Tannins yog cov organic tebchaw uas muaj xim daj lossis xim av thiab lub iab saj. Cov tshuaj no feem ntau pom muaj nyob rau hauv cov nroj tsuag xws li galls, barks, cog cov ntaub so ntswg uas muaj derivatives ntawm gallic acid.
Dab tsi yog Condensed Tannins?
Condensed tannins yog cov organic tebchaw thiab cov ntaub ntawv polymer ua los ntawm condensation ntawm flavan. Cov tebchaw no tsis muaj qab zib residue ua ib feem ntawm cov compound. Lwm lub npe rau condensed tannins muaj xws li proanthocyanidins, polyflavonoid tannins, catechol-type tannins, pyrocatecollic hom tannins, non-hydrolyzable tannins lossis flavolans.
Feem ntau cov tannins yog cov dej-soluble compounds, thiab lawv qee zaum soluble hauv cov kuab tshuaj organic xws li octanol. Txawm li cas los xij, qee qhov loj condensed tannins tsis soluble hauv dej. Yog li ntawd, peb tuaj yeem soj ntsuam tias kev ua haujlwm lom neeg ntawm cov tebchaw no nyob ntawm cov dej solubility.
Daim duab 01: Ib Hom Condensed Tannin
Peb tuaj yeem pom cov tannins ib txwm tshwm sim hauv cov nroj tsuag sib txawv xws li Prunus hom. Cov tshuaj no tsim nyob rau hauv tannosomes, uas yog teev cov organelles nyob rau hauv vascular nroj tsuag. Muaj cov txheej txheem sib txawv peb tuaj yeem siv los ua tus cwj pwm condensed tannins; Piv txwv li, asymmetric flow field flow fractionation, me-angle X-ray scattering[13] thiab MALDI-TOF mass spectrometry.
Dab tsi yog Hydrolyzable Tannins?
Hydrolysable tannins yog cov organic tebchaw uas tuaj yeem tawm los ntawm gallic lossis ellagic acid thaum cua sov nrog HCl lossis sulfuric acid. Thaum xav txog cov qauv ntawm hydrolysable tannins, cov molecules no muaj cov carbohydrate molecule ntawm qhov chaw. Feem ntau, cov carbohydrate no yog D-glucose molecule. Cov hydroxide pawg ntawm cov piam thaj molecule yog ib feem los yog tag nrho esterified nrog phenolic pawg. Yog li ntawd, cov tebchaw no yog sib xyaw ntawm polygalloyl qabzib.
Lub npe ntawm cov tannins no los ntawm nws lub peev xwm los mus rau hydrolysis raws li cov tshuaj tiv thaiv tsis muaj zog acids thiab cov hauv paus tsis muaj zog. Cov tshuaj tiv thaiv hydrolysis tsim cov carbohydrate thiab phenolic acid. Cov tannins hydrolysable yog ib txwm tshwm sim sib txuas. Peb tuaj yeem muab cov tshuaj no los ntawm cov nroj tsuag xws li ntoo txiv ntoo, ntoo qhib ntoo, tara pods, thiab lwm yam.
YPhlorotannins yog dab tsi?
Phlorotannins yog ib pawg ntawm cov organic tebchaw uas yog oligomers ntawm phloroglucinol. Cov tebchaw no tshwm sim nyob rau hauv cov xim av algae xws li rockweeds. Tsis tas li ntawd, cov tshuaj no tuaj yeem pom nyob rau hauv qis qis hauv cov algae liab. Cov tebchaw no muaj peev xwm ua kom cov protein ntau zoo li feem ntau lwm hom tannin. Ntxiv mus, qee cov phlorotannins tuaj yeem oxidize thiab tsim covalent bonds nrog qee cov proteins.
Daim duab 02: Brown Algae
Hauv cov nroj tsuag, phlorotannins tuaj yeem pom hauv cov hlwv me me hu ua physodes. Cov tebchaw no yog dej-soluble vim polar xwm. Tab sis thaum cov compound no tshwm sim nyob rau hauv cov phab ntsa ntawm tes (ntawm cov xim av algae), lawv yog insoluble nyob rau hauv dej thiab ua raws li structural Cheebtsam.
Qhov txawv ntawm Condensed Hydrolyzable thiab Phlorotannins yog dab tsi?
Qhov sib txawv tseem ceeb ntawm condensed hydrolysable thiab phlorotannins yog condensed tannins yog cov tebchaw uas tsim los ntawm condensation ntawm falvan thiab hydrolysable tannins yog cov tebchaw uas tawm los gallic thiab ellagic acids thaum cua sov nrog HCl los yog sulfuric acid whereas phlorotannins yog phloligomerluc.
Cov hauv qab no nthuav tawm ntau qhov sib piv ntsig txog qhov sib txawv ntawm condensed hydrolysable thiab phlorotannins.
Summary – Condensed Hydrolyzable vs Phlorotannins
Tannins yog cov organic tebchaw uas muaj xim daj lossis xim av thiab lub iab saj uas tuaj yeem pom hauv cov nroj tsuag. Qhov sib txawv tseem ceeb ntawm condensed hydrolysable thiab phlorotannins yog condensed tannins xa mus rau cov tebchaw uas tsim los ntawm condensation ntawm falvan thiab hydrolysable tannins xa mus rau cov tebchaw uas tawm los gallic thiab ellagic acids thaum cua sov nrog HCl los yog sulfuric acid whereas phlorotannins yog phlorogmerluc.
