Qhov sib txawv tseem ceeb ntawm tannins thiab tannic acid yog cov tannins yog cov chav kawm ntawm cov organic molecules uas tshwm sim hauv cov ntaub so ntswg, qhov tannic acid yog hom tannin thiab muaj cov acidity tsis muaj zog.
Tannins yog ib pawg ntawm polyphenols. Tannic acid ib hom tannin. Ib qho polyphenol yog cov organic compound uas muaj ntau pawg phenol ua haujlwm. Tannins yog polyphenolic biomolecules.
Tannins yog dab tsi?
Tannins yog ib pawg ntawm polyphenols uas tuaj yeem khi nrog cov proteins thiab ua rau lawv. Cov tebchaw no tuaj yeem cuam tshuam nrog cov amino acids thiab alkaloids. Tannins yog cov tshuaj astringent. Peb tuaj yeem soj ntsuam qhov tshwm sim ntawm tannins hauv ntau cov ntaub so ntswg. Nws ua lub luag haujlwm tseem ceeb hauv kev muab kev tiv thaiv rau cov nroj tsuag los ntawm predation, thiab nws kuj pab tswj kev loj hlob ntawm cov nroj tsuag. Peb tuaj yeem pom cov tannins hauv cov txiv hmab txiv ntoo uas tsis tau siav, uas ua rau lawv qhuav thiab pucker poob vim qhov astringency ntawm tannins.
Daim duab 01: Tannin Powder
Muaj peb chav kawm ntawm tannins li hydrolysable tannins, phlorotannins thiab condensed tannins. Tag nrho cov hom no yog cov qauv polymeric muaj monomer units: lub monomer rau hydrolysable tannins yog gallic acid, thaum monomer rau phlorotannins yog phloroglucinol thiab monomer rau condensed tannins yog flavan-3-ol. Muaj ntau qhov chaw sib txawv rau txhua chav kawm ntawm tannin. Piv txwv li, lub hauv paus rau hydrolysable tannins yog cov nroj tsuag, thaum lub hauv paus rau phlorotannins yog xim av algae, thiab rau condensed tannins, qhov chaw yog heartwood.
Rau qhov kev txiav txim siab ntawm qhov muaj tannins hauv cov qauv muab, peb tuaj yeem siv peb hom kev. Lawv yog cov txheej txheem nag lossis daus alkaloid, Goldbeater kuaj tawv nqaij thiab kuaj ferric chloride. Nyob rau hauv txoj kev alkaloid nag lossis daus, peb tuaj yeem pom tias alkaloids tuaj yeem ua rau cov tannins thiab lwm yam polyphenols. Nws tuaj yeem siv los ua qhov kev ntsuas ntau, thiab. Peb tuaj yeem txiav txim siab qhov muaj tannins ntawm Goldbeater qhov kev kuaj tawv nqaij; Thaum lub goldbeater cov tawv nqaij yog dipped nyob rau hauv hydrochloric acid thiab yaug hauv dej, ua raws li kev kho mob nrog ferrous sulfate tov, nws muab ib tug xiav-dub xim yog hais tias nws muaj tannin.
Tannic Acid yog dab tsi?
Tannic acid yog cov organic molecule uas muaj cov tshuaj formula C 76H52O46. Nws yog ib hom tannin, thiab nws yog polyphenol. Nws muaj ib tug tsis muaj zog acidity. Qhov ntawd yog vim muaj ntau pawg phenol ua haujlwm.
Daim duab 02: Cov qauv ntawm Tannic Acid
Muaj ntau daim ntawv thov tseem ceeb ntawm tannic acid. Piv txwv li, peb tuaj yeem siv cov tannic acid rau cov ntoo uas tsis tshua muaj tannin, uas yuav pab tiv thaiv cov tshuaj stains. Tsis tas li ntawd, peb tuaj yeem siv tannic acid ua mordant hauv cov txheej txheem dyeing rau kev tsim cov cellulose fiber ntau xws li paj rwb. Tsis tas li ntawd, peb tuaj yeem siv tannic acid ntawm cov khoom hlau rau kev txuag ntawm daim ntawv ferrous los ntawm corrosion thiab passivate. Tsis tas li ntawd, tannic acid yog qhov tseem ceeb hauv kev lag luam khoom noj thiab. e.g. npias clarification, wine clarification, xim stabilizing, thiab lwm yam.
Qhov txawv ntawm Tannins thiab Tannic Acid yog dab tsi?
Tannins yog ib pawg ntawm polyphenols. Tannic acid ib hom tannin. Qhov sib txawv tseem ceeb ntawm tannins thiab tannic acid yog tannins yog ib chav kawm ntawm cov organic molecules uas tshwm sim hauv cov ntaub so ntswg, hos tannic acid yog hom tannin thiab muaj cov acidity tsis muaj zog.
Cov lus qhia hauv qab no qhia qhov txawv ntawm tannins thiab tannic acid.
Summary – Tannins vs Tannic Acid
Tannins yog ib pawg ntawm polyphenols, thaum tannic acid yog ib hom tannin. Qhov sib txawv tseem ceeb ntawm tannins thiab tannic acid yog tannins yog ib chav kawm ntawm cov organic molecules uas tshwm sim hauv cov ntaub so ntswg, hos tannic acid yog hom tannin thiab muaj cov acidity tsis muaj zog.
