Tshuaj lom neeg cov kev tshua nyob rau hauv fermentation ntawm hydroxypropyf methylcellose

HydroxyPropyyl Methylcellulose (HPMC)yog dej-soluble polymer sib xyaw ua ke nyob rau hauv kev lag luam thiab kev kho mob muaj txiaj ntsig, thiab muaj cov khoom noj thiab ua zaub ua noj. Cov tshuaj lom neeg cov kev coj ua nyob rau hauv nws cov txheej txheem fermentation yog feem ntau cuam tshuam nrog qhov kev ua tsis ncaj thiab kev hloov kho ntawm cellulose thiab cov kev ua ub ua me ntawm cov kab mob ntawm cov microorganisms. Txhawm rau kom nkag siab zoo dua cov tshuaj lom neeg ntawm HPMC nyob rau hauv cov txheej txheem fermentation, peb ua ntej yuav tsum nkag siab nws cov qauv theem pib thiab cov txheej txheem degradigose ntawm cellulose.

1. Cov qauv theem pib thiab cov khoom ntawm hydroxypropyl methylulose

HPMC yog ib qho kev ua yeeb yam tau txais los ntawm kev hloov tshuaj lom neeg ntawm cov cellulose ntuj (cellulose). Tus txha caj qaum ntawm nws cov molecular saw yog cov hmoov av molecules (C6h12O6) txuas nrog β-1,4 glycosidic bonds. Cellulose nws tus kheej yog nyuaj kom yaj hauv dej, tab sis los ntawm kev qhia methyl (-c3h7th) muaj peev xwm txhim kho kom zoo dua los ua ib lub soluble polymer. Cov txheej txheem hloov kho ntawm HPMC feem ntau suav nrog cov tshuaj tiv thaiv ntawm methyl chloride (C3h6o) thiab cov khoom lag luam muaj zog muaj zog hydrophilicity thiab solubility.

2. Tshuaj lom neeg thaum lub sij hawm fermentation

Cov txheej txheem fermentation ntawm HPMC feem ntau yog nyob ntawm qhov kev txiav txim ntawm cov microorganisms, uas siv HPMC yog cov khoom siv roj carbon ntau. Cov txheej txheem Fermentation ntawm HPMC suav nrog cov theem hauv qab no:

2.1. Kev tsis pom ntawm HPMC

Cellulose nws tus kheej yog tsim cov chav dej qab zib sib txuas, thiab HPMC ua rau muaj suab thaj me me (xws li cov piam thaj, xylose, thiab lwm yam). Cov txheej txheem no feem ntau cuam tshuam nrog kev txiav txim ntawm ntau cov cellulose degrading enzymes. Qhov kev xav tseem ceeb nyob rau:

Cellulose hydrololysis tiv thaiv: 1,4 glycosidic kev sib khi hauv cov pob zeb, xws li cellulose hydrocases (xws li oligosaccharides, thiab lwm yam). Cov suab thaj no yuav yog cov metabolized ntxiv thiab siv los ntawm cov kab mob me me.

Hydrolysis thiab kev tsis zoo ntawm HPMC: lub methyl thiab hydroxypropyl chaw nyob hauv HPMC lwg me me yuav raug tshem tawm los ntawm hydrolysis. Qhov kev sib tshwj xeeb ntawm kev siv hydrolysis tsis tau tseem tsis tau paub meej, tab sis nws tuaj yeem paub txog kev ua kom tau cov kab mob catalyszed los ntawm cov kab mob uas zais cia (xws li hydroxyrances (xws li hydroxyrances (xws li hydroxyl esterase). Cov txheej txheem no ua rau cov so ntawm HPMC molecular chains thiab tshem tawm cov pab pawg ua haujlwm, ua kom muaj cov piam thaj me me.

2.2. Microbial Metabolic Cov Khoom Siv

Thaum HPMC yog degraded rau me me qab zib lwg me me, cov kab mob me me muaj peev xwm hloov cov piam thaj no mus rau hauv lub zog los ntawm kev ua kom zoo nkauj los ntawm kev ua kom zoo nkauj. Tshwj xeeb, microorganisms decucose glucose rau hauv ethanol, lactic acid lossis lwm cov metawv kua qaub lossis lwm cov metabolites los ntawm kev ua haujlwm. Cov kab mob sib txawv yuav ua rau cov khoom lag luam HPMC tsis zoo los ntawm txoj kev sib txawv. Cov Patholic Hom Me Me xws li:

Glycolysis txoj kev: qabzib yog decomposed rau hauv pyluvate los ntawm cov enzymes thiab kev hloov pauv ntxiv rau hauv lub zog (ATTAB) thiab metabolites (xws li lactic acid, ethanol, thiab lwm yam).

Fermentation khoom tiam: Raws li Anaerobic lossis cov khoom siv hypoxic, cov khoom lag luam lactic, thiab lwm yam los ntawm kev siv cov txheej txheem sib txawv.

2.3. Redox cov tshuaj tiv thaiv

Thaum lub sij hawm fermentation cov txheej txheem ntawm HPMC, qee cov kab mob me me tuaj yeem hloov kho cov khoom nruab nrab ntawm cov khoom siv redebs. Piv txwv li, cov txheej txheem ntau lawm ntawm ethanol yog nrog redebate los tsim cov pyruvate, thiab tom qab ntawd pyluvate tau hloov mus rau ethanol los ntawm kev tiv thaiv kev txo qis. Cov kev tawm tsam no yog qhov tseem ceeb rau kev tswj cov metabolic tshuav nyiaj ntawm cov hlwb.

3. Tswj cov ntsiab lus hauv cov txheej txheem fermentation

Thaum lub sij hawm fermentation cov txheej txheem ntawm HPMC, ib puag ncig cov ntsiab lus muaj qhov tseem ceeb uas cuam tshuam ntawm kev siv tshuaj lom neeg. Piv txwv li, pH, ph, rwj, yaj oxyged cov ntsiab lus oxygen, thiab lwm yam. Qhov tshwj xeeb tshaj yog kub thiab pH, kev ua haujlwm ntawm cov qauv thiab hluav taws xob kom paub meej txog HPMC thiab nws yog qhov kev vam meej ntawm cov txheej txheem metabolic ntawm cov microorganisms.

Cov txheej txheem fermentation ntawmHPMCYuav cov tshuaj lom neeg nyuaj heev, suav nrog cov hydrolysis ntawm cellulose, qhov kev cuam tshuam ntawm HPMC, cov metabolism ntawm cov suab thaj, thiab tiam ntawm fermentation khoom. Nkag siab cov kev tsis sib haum tsis tsuas pab kom ua kom cov txheej txheem fermentation ntawm HPMC, tab sis kuj muab cov kev txhawb nqa theoretical rau kev tsim khoom. Nrog rau qhov tob ntawm kev tshawb fawb, ntau dua thiab kev lag luam fermentation kev ua tau zoo ntawm HPMC thiab txhawb nqa daim ntawv thov HPMC thiab txhawb nqa daim ntawv thov HPMC thiab kev tiv thaiv ib puag ncig, kev tiv thaiv ib puag ncig thiab lwm thaj chaw.