Nā hopena kemika i ka fermentation o ka hydroxypropyl methylcellulose

ʻO ka Hydroxypropyl methylcellulose (HPMC)He hui polymer wai-hoʻoheheʻe ʻia i hoʻohana pinepine ʻia i nā ʻoihana ʻoihana a me nā lāʻau lapaʻau, a he nui nā waiwai noi, e like me ka hoʻokuʻu ʻana i ka lāʻau lapaʻau, ka hana ʻana i ka meaʻai a me nā mea kūkulu hale. ʻO nā hopena kemika i kāna kaʻina hana fermentation e pili nui ana i ka hōʻino ʻana a me ka hoʻololi ʻana o ka cellulose a me nā hana metabolic o nā microorganism. I mea e hoʻomaopopo maikaʻi ai i nā hopena kemika o HPMC i ke kaʻina hana fermentation, pono mua mākou e hoʻomaopopo i kona ʻano kumu a me ke kaʻina hana hōʻino o ka cellulose.

1. ʻO ke ʻano kumu a me nā waiwai o ka hydroxypropyl methylcellulose

ʻO ka HPMC kahi derivative i loaʻa ma o ka hoʻololi kemika o ka cellulose kūlohelohe (Cellulose). ʻO ke kuamoʻo o kona kaulahao molekala he mau mole glucose (C6H12O6) i hoʻopili ʻia e nā pilina β-1,4 glycosidic. He paʻakikī ke hoʻoheheʻe ʻia ʻo Cellulose i ka wai, akā ma ka hoʻokomo ʻana i nā hui methyl (-OCH3) a me hydroxypropyl (-C3H7OH), hiki ke hoʻomaikaʻi nui ʻia kona solubility wai e hana i kahi polymer soluble. ʻO ke kaʻina hana hoʻololi o HPMC ma ke ʻano laulā e pili ana i ka hopena o ka cellulose me ka methyl chloride (CH3Cl) a me ka propylene alcohol (C3H6O) ma lalo o nā kūlana alkaline, a ʻo ka huahana hopena he hydrophilicity ikaika a me ka solubility.

2. Nā hopena kemika i ka wā o ka fermentation

ʻO ke kaʻina hana fermentation o HPMC e hilinaʻi pinepine ʻia ma ka hana a nā microorganisms, e hoʻohana ana iā HPMC ma ke ʻano he kumu kalapona a me ke kumu meaʻai. ʻO ke kaʻina hana fermentation o HPMC e pili ana i kēia mau pae nui:

2.1. Ka hōʻino ʻia ʻana o HPMC

Ua haku ʻia ʻo Cellulose ponoʻī me nā ʻāpana glucose i hoʻopili ʻia, a e hoʻohaʻahaʻa ʻia ka HPMC e nā microorganism i ka wā o ke kaʻina hana fermentation, e hoʻokaʻawale mua ʻia i loko o nā kō liʻiliʻi e hiki ke hoʻohana ʻia (e like me ka glucose, xylose, a pēlā aku). ʻO ka maʻamau, pili kēia kaʻina hana i ka hana o nā enzymes hoʻohaʻahaʻa cellulose he nui. ʻO nā hopena hoʻohaʻahaʻa nui e komo pū ana me:

ʻO ka hopena hydrolysis cellulose: E uhaʻi ʻia nā pilina β-1,4 glycosidic i loko o nā mole cellulose e nā cellulose hydrolases (e like me cellulase, endocellulase), e hana ana i nā kaulahao kō pōkole (e like me oligosaccharides, disaccharides, a pēlā aku). E hoʻopili hou ʻia kēia mau kō a hoʻohana ʻia e nā microorganism.

ʻO ka hydrolysis a me ka hoʻohaʻahaʻa ʻana o HPMC: E hoʻoneʻe hapa ʻia nā mea hoʻohui methyl a me hydroxypropyl i loko o ka mole HPMC e ka hydrolysis. ʻAʻole maopopo loa ke ʻano kikoʻī o ka hopena hydrolysis, akā hiki ke kuhi ʻia i loko o kahi kaiapuni fermentation, hoʻoulu ʻia ka hopena hydrolysis e nā enzymes i hūnā ʻia e nā microorganisms (e like me ka hydroxyl esterase). Ke alakaʻi nei kēia kaʻina hana i ka haki ʻana o nā kaulahao molekala HPMC a me ka wehe ʻana o nā hui hana, a laila e hana ana i nā mole kō liʻiliʻi.

2.2. Nā hopena metabolic microbial

Ke hoʻohaʻahaʻa ʻia ka HPMC i nā mole kō liʻiliʻi, hiki i nā microorganism ke hoʻololi i kēia mau kō i ikehu ma o nā hopena enzymatic. ʻO ke kikoʻī, hoʻohaʻahaʻa nā microorganism i ka glucose i loko o ka ethanol, ka waikawa lactic a i ʻole nā ​​​​​​metabolites ʻē aʻe ma o nā ala fermentation. Hiki i nā microorganism like ʻole ke hoʻololi i nā huahana hoʻohaʻahaʻa HPMC ma o nā ala like ʻole. ʻO nā ala metabolic maʻamau:

Ke ala Glycolysis: Hoʻoheheʻe ʻia ka glucose i pyruvate e nā enzymes a hoʻololi hou ʻia i ikehu (ATP) a me nā metabolites (e like me ka lactic acid, ethanol, a pēlā aku).

Ka hana ʻana o ka huahana fermentation: Ma lalo o nā kūlana anaerobic a hypoxic paha, hoʻololi nā microorganism i ka glucose a i ʻole kāna mau huahana degradation i nā waikawa organik e like me ka ethanol, lactic acid, acetic acid, a me nā mea ʻē aʻe ma o nā ala fermentation, i hoʻohana nui ʻia i nā kaʻina hana ʻoihana like ʻole.

2.3. Ka hopena Redox

I ke kaʻina hana fermentation o HPMC, hiki i kekahi mau microorganism ke hoʻololi hou i nā huahana waena ma o nā hopena redox. No ka laʻana, hele pū ke kaʻina hana o ka ethanol me nā hopena redox, hoʻopau ʻia ka glucose e hana i ka pyruvate, a laila hoʻololi ʻia ka pyruvate i ethanol ma o nā hopena hōʻemi. He mea nui kēia mau hopena no ka mālama ʻana i ke kaulike metabolic o nā cell.

3. Nā kumu hoʻomalu i ke kaʻina hana fermentation

I ka wā o ke kaʻina hana fermentation o HPMC, he mana koʻikoʻi ko nā mea pili i ke kaiapuni i nā hopena kemika. No ka laʻana, ʻo ka pH, ka mahana, ka nui o ka oxygen i hoʻoheheʻe ʻia, ka nui o nā meaʻai, a me nā mea ʻē aʻe e hoʻopilikia i ka metabolic rate o nā microorganisms a me ke ʻano o nā huahana. ʻOi aku ka mahana a me ka pH, hiki ke ʻokoʻa nui ka hana o nā enzymes microbial ma lalo o nā kūlana mahana a me ka pH like ʻole, no laila pono e hoʻomalu pono i nā kūlana fermentation e hōʻoia i ka hōʻino ʻana o HPMC a me ka holomua mālie o ke kaʻina hana metabolic o nā microorganisms.

ʻO ke kaʻina hana fermentation oHPMCpili i nā hopena kemika paʻakikī, me ka hydrolysis o ka cellulose, ka hōʻino ʻana o HPMC, ka metabolism o nā kō, a me ka hana ʻana o nā huahana fermentation. ʻO ka hoʻomaopopo ʻana i kēia mau hopena ʻaʻole wale e kōkua i ka hoʻomaikaʻi ʻana i ke kaʻina hana fermentation o HPMC, akā hāʻawi pū kekahi i ke kākoʻo kumumanaʻo no ka hana ʻoihana e pili ana. Me ka hohonu o ka noiʻi, hiki ke hoʻomohala ʻia nā ʻano fermentation ʻoi aku ka maikaʻi a me ka hoʻokele waiwai i ka wā e hiki mai ana e hoʻomaikaʻi i ka pono o ka hōʻino ʻana o HPMC a me ka hua o nā huahana, a paipai i ka hoʻohana ʻana o HPMC i ka biotransformation, ka palekana o ke kaiapuni a me nā ʻoihana ʻē aʻe.