Iindaba - Imveliso yeVanillin yendalo evela kwizixhobo ezihlaziyekayo

I. Intshayelelo

I-Vanillin yenye yezona zinto zidumileyo nezisetyenziswa kakhulu kwihlabathi liphela. Ngokwesiko, ikhutshwe kwiimbotyi zevanilla, ezibiza kakhulu kwaye zijongene nemingeni malunga nokuzinza kunye nobuthathaka bekhonkco lokubonelela. Nangona kunjalo, ngokuqhubela phambili kwi-biotechnology, ngakumbi kwicandelo lokuguqulwa kwezinto eziphilayo, kuye kwavela ixesha elitsha lokuveliswa kwe-vanillin yendalo. Ukusebenzisa iintsholongwane ekuguqulweni kwezinto eziphilayo zendalo kuye kwabonelela ngendlela efanelekileyo yokwenza i-vanillin. Le ndlela ayijongi nje kuphela iingxaki zokuzinza kodwa ikwabonelela ngezisombululo ezintsha kushishino lwencasa. Uphando olwenziwe yi-SRM Institute of Science and Technology (SRMIST) lubonelele ngophononongo olupheleleyo lweendlela ezahlukeneyo zokwenziwa kwe-vanillin kwibhayoloji kunye nokusetyenziswa kwazo kwicandelo lokutya, lushwankathela iindlela ezahlukeneyo zokwenziwa kwe-vanillin kwibhayoloji ukusuka kwiindawo ezahlukeneyo kunye nokusetyenziswa kwayo okuhlukeneyo kushishino lokutya.

II. Indlela yokufumana iVanillin yendalo kwiZixhobo eziHlaziyiweyo

Ukusetyenziswa kweFerulic Acid njenge Substrate

I-asidi ye-Ferulic, ephuma kwimithombo efana ne-rice bran kunye ne-oat bran, ibonisa ukufana kwesakhiwo ne-vanillin kwaye isebenza njengesiseko esisetyenziswa kakhulu sokuvelisa i-vanillin. Iintsholongwane ezahlukeneyo ezifana ne-Pseudomonas, i-Aspergillus, i-Streptomyces, kunye ne-fungi ziye zasetyenziswa ukuvelisa i-vanillin kwi-asidi ye-ferulic. Okuphawulekayo kukuba, iintlobo ezifana ne-Amycolatopsis kunye ne-White-rot fungi zichongiwe njengezona zinokuba ngabaviwa bokuvelisa i-vanillin kwi-asidi ye-ferulic. Izifundo ezininzi ziphande ukuveliswa kwe-vanillin kwi-asidi ye-ferulic kusetyenziswa iintsholongwane, iindlela ze-enzymatic, kunye neenkqubo ezingasebenziyo, zigxininisa ukuguquguquka kunye namandla ale ndlela.

Ukwenziwa kwe-enzyme ye-vanillin kwi-asidi ye-ferulic kubandakanya i-enzyme ephambili i-feruloyl esterase, ekhuthaza i-hydrolysis ye-ester bond kwi-asidi ye-ferulic, ikhuphe i-vanillin kunye nezinye iimveliso ezinxulumene nayo. Ngokuhlola ubungakanani obufanelekileyo bee-enzymes ze-vanillin biosynthetic kwiinkqubo ezingenaseli, abaphandi baphuhlise uhlobo oluphuculweyo lwe-Escherichia coli olukwaziyo ukuguqula i-asidi ye-ferulic (20mM) ibe yi-vanillin (15mM). Ukongeza, ukusetyenziswa kwe-microbial cell immobilization kufumene ingqalelo ngenxa yokuhambelana kwayo okuhle kunye nozinzo phantsi kweemeko ezahlukeneyo. Indlela entsha ye-immobilization yokuvelisa i-vanillin kwi-asidi ye-ferulic iye yaphuhliswa, isusa imfuneko yee-coenzymes. Le ndlela ibandakanya i-decarboxylase engaxhomekekanga kwi-coenzyme kunye ne-oxygenase engaxhomekekanga kwi-coenzyme enoxanduva lokuguqula i-asidi ye-ferulic ibe yi-vanillin. Ukuthintela kunye ukushukunyiswa kwe-FDC kunye ne-CSO2 kwenza kube lula ukuvelisa i-2.5 mg ye-vanillin kwi-ferulic acid kwimijikelo elishumi yokusabela, nto leyo ebonisa umzekelo wokuqala wokuveliswa kwe-vanillin nge-enzyme biotechnology engashukumiyo.

Ukusetyenziswa kwe-Eugenol/Isoeugenol njenge-Substrate

I-Eugenol kunye ne-isoeugenol, xa ziphantsi kokuguqulwa kwe-bioconversion, zivelisa i-vanillin kunye ne-metabolites yayo enxulumene nayo, efunyenwe inezicelo ezahlukeneyo kunye nexabiso elikhulu kwezoqoqosho. Izifundo ezininzi zihlolisise ukusetyenziswa kwee-microorganisms eziguqulwe ngokwezakhi zofuzo nezendalo ukwenza i-vanillin kwi-eugenol. Amandla okuwohloka kwe-eugenol abonwe kwiibhaktheriya ezahlukeneyo kunye nefungi, kubandakanya kodwa kungaphelelanga apho kwi-Bacillus, Pseudomonas, Aspergillus, kunye neRhodococcus, ebonisa amandla azo kwimveliso ye-vanillin evela kwi-eugenol. Ukusetyenziswa kwe-eugenol oxidase (EUGO) njenge-enzyme yokuvelisa i-vanillin kwindawo yemizi-mveliso kubonise amandla amakhulu. I-EUGO ibonisa uzinzo kunye nomsebenzi kuluhlu olubanzi lwe-pH, kunye ne-EUGO enyibilikayo ekhulisa umsebenzi kwaye inciphisa ixesha lokuphendula. Ngaphezu koko, ukusetyenziswa kwe-EUGO engashukumiyo kuvumela ukubuyiselwa kwe-biocatalyst kwimijikelo yokusabela ukuya kuthi ga kwi-18, okukhokelela ekwandeni kwe-biocatalyst ngokuphindwe kalishumi elinesibini. Ngokufanayo, i-enzyme engashukumiyo i-CSO2 inokukhuthaza ukuguqulwa kwe-isoeugenol ibe yi-vanillin ngaphandle kokuxhomekeka kwi-coenzymes.

Ezinye ii-substrates

Ukongeza kwi-asidi ye-ferulic kunye ne-eugenol, ezinye iikhompawundi ezifana ne-asidi ye-vanillic kunye ne-C6-C3 phenylpropanoids zichongiwe njengezinto ezinokubangela imveliso ye-vanillin. I-asidi ye-Vanillic, eveliswa njengemveliso ephuma kwi-lignin degradation okanye njengenxalenye ekhuphisanayo kwiindlela ze-metabolic, ithathwa njengesandulela esiphambili semveliso ye-vanillin esekwe kwi-bio. Ngaphezu koko, ukubonelela ngengqiqo malunga nokusetyenziswa kwe-C6-C3 phenylpropanoids kwi-vanillin synthesis kunika ithuba elikhethekileyo lokuvelisa incasa ezinzileyo neyintsha.

Ukuqukumbela, ukusetyenziswa kwezixhobo ezivuselelekayo kwimveliso ye-vanillin yendalo ngokusebenzisa i-biotransformation yeentsholongwane luphuhliso olubalulekileyo kwishishini leencasa. Le ndlela inika indlela eyahlukileyo, ezinzileyo yokuvelisa i-vanillin, ijongana neenkxalabo zozinzo kunye nokunciphisa ukuxhomekeka kwiindlela zemveli zokukhupha. Ukusetyenziswa okwahlukeneyo kunye nexabiso lezoqoqosho le-vanillin kulo lonke ishishini lokutya kugxininisa ukubaluleka kophando oluqhubekayo kunye nophuhliso kule ndawo. Uphuhliso oluzayo kwicandelo lemveliso ye-vanillin yendalo lunamandla okuguqula ishishini leencasa, lubonelele ngezinye iindlela ezizinzileyo nezinobuhlobo nendalo zokuvelisa incasa. Njengoko siqhubeka nokusebenzisa amandla ezixhobo ezivuselelekayo kunye nophuhliso lwe-biotechnology, ukuveliswa kwe-vanillin yendalo ukusuka kwiindawo ezahlukeneyo kunika indlela ethembisayo yokuvelisa incasa ezinzileyo.

III. Zithini iingenelo zokusebenzisa izixhobo ezivuselelekayo ukuvelisa i-vanillin yendalo

Indawo intle:Ukusebenzisa izixhobo ezivuselelekayo ezifana nezityalo kunye nenkunkuma yebhayomass ukuvelisa i-vanillin kunokunciphisa imfuneko yamafutha efosili, ukunciphisa impembelelo embi kwindalo esingqongileyo, kunye nokunciphisa ukukhutshwa kwegesi ezibangela ubushushu.

Uzinzo:Ukusebenzisa izixhobo ezivuselelekayo kwenza kubekho umbane ozinzileyo kunye nezinto ezikrwada, nto leyo enceda ekukhuseleni izixhobo zendalo kwaye ihlangabezane neemfuno zezizukulwana ezizayo.

Ukukhuselwa kweentlobo ngeentlobo zezinto eziphilayo:Ngokusebenzisa izixhobo ezihlaziyekayo ngengqiqo, izixhobo zezityalo zasendle zingakhuseleka, nto leyo enegalelo ekukhuselweni kwezinto ezahlukeneyo eziphilayo kunye nokugcinwa kolungelelwaniso lwendalo.

Umgangatho wemveliso:Xa kuthelekiswa ne-vanillin yokwenziwa, i-vanillin yendalo inokuba neenzuzo ezingaphezulu kumgangatho wevumba kunye neempawu zendalo, nto leyo eya kunceda ukuphucula umgangatho weemveliso zencasa kunye nevumba elimnandi.

Nciphisa ukuxhomekeka kumafutha efosili:Ukusetyenziswa kwezixhobo ezivuselelekayo kunceda ekunciphiseni ukuxhomekeka kumafutha efosili anqabileyo, nto leyo eluncedo kukhuseleko lwamandla kunye nokwahlukahluka kwesakhiwo samandla. Ndiyathemba ukuba ulwazi olungentla luza kuphendula imibuzo yakho. Ukuba ufuna uxwebhu lwesalathiso ngesiNgesi, nceda undazise ukuze ndikunike lona.

IV. Isiphelo

Amandla okusebenzisa izixhobo ezivuselelekayo ukuvelisa i-vanillin yendalo njengendlela ezinzileyo neyinobuhlobo nokusingqongileyo abalulekile. Le ndlela ithembisa ekusombululeni imfuno ekhulayo ye-vanillin yendalo ngelixa inciphisa ukuxhomekeka kwiindlela zokwenza izinto ezenziweyo.

I-vanillin yendalo ibambe indawo ebalulekileyo kwishishini leencasa, ixatyiswa ngenxa yevumba layo elikhethekileyo kunye nokusetyenziswa ngokubanzi njengearhente yokunambitha kwiimveliso ezahlukeneyo. Kubalulekile ukugxininisa ukubaluleka kwe-vanillin yendalo njengesithako esifunwa kakhulu kwishishini lokutya, iziselo, kunye nevumba elimnandi ngenxa yeprofayili yayo ephezulu yeemvakalelo kunye nokukhetha kwabathengi iincasa zendalo.

Ngaphezu koko, intsimi yemveliso ye-vanillin yendalo inika amathuba amakhulu ophando olongezelelekileyo nophuhliso. Oku kuquka ukuphonononga ubuchwepheshe obutsha kunye neendlela ezintsha zokuphucula ukusebenza kakuhle kunye nokuzinza kokuvelisa i-vanillin yendalo kwizixhobo ezivuselelekayo. Ukongeza, uphuhliso lweendlela zemveliso ezinokwandiswa kwaye zingabizi kakhulu luya kudlala indima ebalulekileyo ekukhuthazeni ukwamkelwa ngokubanzi kwe-vanillin yendalo njengendlela ezinzileyo nenobuhlobo nokusingqongileyo kushishino lwencasa.