Qhov Tseem Ceeb Qhov Sib Txawv - Dietary Fiber vs Crude Fiber
Dietary fiber yog ib feem ntawm cov zaub mov uas tsis tau muab los ntawm cov nroj tsuag. Nws yog cov txiaj ntsig ntawm ob pawg soluble thiab tsis soluble fiber ntau. Crude fiber yog ib feem ntawm insoluble fiber pom nyob rau hauv lub edible feem ntawm cov nroj tsuag cell phab ntsa. Qhov no yog qhov sib txawv tseem ceeb ntawm kev noj haus fiber ntau thiab crude fiber. Lwm qhov sib txawv tau piav qhia hauv kab lus no.
YDietary Fiber yog dab tsi?
Cov khoom noj fiber ntau, tseem hu ua bulk lossis roughage, muaj nyob rau hauv cov khoom noj ntawm cov nroj tsuag phab ntsa (pom nyob rau hauv txiv hmab txiv ntoo, zaub, tag nrho cov nplej, thiab legumes) thiab tsis tuaj yeem zom los ntawm tib neeg lub cev. Nws yog cov lej ntawm polysaccharides thiab lignin. Cov khoom tseem ceeb yog cellulose, hemicelluloses, non-cellulose polysaccharides, pectin, lignin thiab hydrocolloids (cov pos hniav, mucilages, thiab algal polysaccharides). Qhov nruab nrab ntawm cov cellulose, hemicelluloses (tsis yog cellulose polysaccharides) thiab lignin yog 20%, 70%, thiab 10% feem.
Definition of Dietary Fiber – Pom zoo los ntawm Trowell li al., (1985)
"Kev noj zaub mov fiber ntau muaj cov seem ntawm cov nroj tsuag uas tiv taus hydrolysis (kev zom zaub mov) los ntawm cov enzymes alimentary ntawm tus txiv neej uas nws cov khoom yog hemicelluloses, cellulose, lignin, oligosaccharides, pectins, pos hniav, thiab waxes."
Kev noj zaub mov muaj fiber ntau tuaj yeem faib ua ob pawg raws li nws cov solubility hauv dej raws li hauv qab no.
| Ntse | YFibre tivthaiv | Kev piav qhia | Main food sources |
| Dej insoluble / Tsawg fermented | Cov qauv tseem ceeb ntawm cov phab ntsa cog ntoo. Insoluble nyob rau hauv concentrated alkali, soluble nyob rau hauv concentrated acid. | Nroj tsuag (zaub, qab zib beet, ntau hom bran) | |
| YHemicellulose | Cell phab ntsa polysaccharides, uas muaj cov pob txha ntawm β-1, 4 glucosidic linkages. Soluble hauv dilute alkali. | ||
| Lignin | Tsis yog-carbohydrate cell phab ntsa tivthaiv. Complex cross-linked phenyl propane polymer. Resistant cov kab mob degradation. | ||
| Pectin | Cov khoom ntawm cov phab ntsa ntawm cov thawj cell nrog D-galacturonic acid ua cov khoom tseem ceeb. Feem ntau, dej soluble thiab gel tsim | ||
| Secreted ntawm qhov chaw ntawm cov nroj tsuag raug mob los ntawm tshwj xeeb secretary cells. Khoom noj khoom haus thiab tshuaj siv | Cov noob qoob loo zoo (guar, locust taum), seaweed extracts (carrageenan, alginates), microbial pos hniav (xanthan, gellan) | ||
| Mucilages | Synthesized los ntawm cov nroj tsuag, tiv thaiv desiccation ntawm noob endosperm. Khoom noj khoom haus kev lag luam siv, hydrophilic, stabilizer. | cog cov pos hniav (gum acacia, gum karaya, gum tragacanth) |
txiaj ntsig ntawm Dietary Fiber
Nco lub plab zom mov
Lawv ua kom qhov hnyav thiab qhov loj ntawm cov quav thiab ua kom mos kom yooj yim rau kev nkag. Lawv kuj txo txoj kev pheej hmoo ntawm cem quav thiab ua kom cov quav dej khov thiab tsis txhob xoob.
Txhim plab hnyuv noj qab haus huv
Cov khoom noj fiber ntau txo qhov kev pheej hmoo ntawm kev tsim hemorrhoids thiab kab mob diverticular.
Taum, oats, flaxseed thiab oat bran tuaj yeem txo qis Lipoprotein (LDL) hauv tag nrho cov roj cholesterol.
Control ntshav qab zib
Soluble fiber txo qhov nqus cov piam thaj thiab ua kom cov ntshav qab zib kom zoo. Insoluble fiber kuj pab txo cov ntshav qab zib hom 11.
Txhawb nqa kom noj qab haus huv
Cov khoom noj fiber ntau muab lub zog tsawg dua los ntawm kev ua kom ob peb calories los ntawm tib lub ntim khoom noj. Lawv nyiam ua kom puv dua li cov khoom noj muaj fiber ntau.
Crude Fiber yog dab tsi?
Crude fiber yog ib feem ntawm cov fiber ntau insoluble pom nyob rau hauv edible feem ntawm cov nroj tsuag cell phab ntsa. Nws yog cov khoom siv cellulose uas tau txais los ua ib qho seem ntawm kev tshuaj xyuas tshuaj ntawm cov zaub.
Crude fiber yog tshuaj xyuas hauv chav kuaj los ntawm qhov cub kom qhuav ntawm cov qauv tom qab raug rau cov tshuaj sulfuric acid thiab sodium hydroxide tov. Dab tsi yog seem li crude fiber tsis muaj zaub mov muaj nqis.
Qhov txiaj ntsig tseem ceeb ntawm kev noj qab haus huv ntawm cov fiber ntau yog tias nws ua kom lub plab zom mov tsis tu ncua. Cov nplooj ntsuab, tag nrho cov nplej, thiab taum (taum dub) yog qee qhov piv txwv ntawm cov fiber ntau crude.
Dab tsi yog qhov txawv ntawm Dietary Fiber thiab Crude Fiber?
Yam ntxwv ntawm Dietary Fiber thiab Crude Fiber:
Keeb kwm:
Kev noj zaub mov fiber ntau: Cov khoom noj fiber ntau yog cov txiaj ntsig ntawm ob pawg soluble thiab tsis soluble fiber ntau.
Crude fibers: Crude fiber yog ib feem ntawm insoluble fiber pom nyob rau hauv cov edible feem ntawm cov nroj tsuag cell phab ntsa.
Solubility:
Cov khoom noj fiber ntau: Cov khoom noj fiber ntau yog soluble lossis tsis soluble hauv dej.
Crude fibers: Crude fiber tsis soluble hauv dej.
Fermentation:
Cov khoom noj fiber ntau: Qee cov fibers noj zaub mov raug rau fermentation hauv lub plab zom mov.
Crude fibers: Crude fibers tsis fermented hauv lub plab zom mov.
Xwm hauv lub plab zom mov:
Kev noj zaub mov fiber ntau: Cov khoom noj fiber ntau yuav zoo li qub thaum nws dhau los ntawm txoj hnyuv, tab sis qhov no yog raws li hom kev noj haus fiber ntau.
Crude fibers: Crude fibers yog txheeb ze nyob rau hauv ib lub sij hawm ntawm passage.
Composition:
Kev noj zaub mov fiber ntau: Cov khoom noj fiber ntau muaj pectins, pos hniav, thiab mucilages.
Crude fibers: Crude fibers tsis muaj pectins, pos hniav, thiab mucilages.
