Umbala Obomvu Wesikhumba Samagilebhisi
Umbala obomvu wesikhumba samagilebhisi, owaziwa nangokuthi i-grape skin extract, umbala wemvelo osuselwa ku-anthocyanin otholakala ku-grape pomace—izikhumba ezisele ngemva kokujusiswa kwamagilebhisi noma ukwenza iwayini. Inqubo yokukhiqiza ihilela ukususa imbewu nokungcola ku-pomace, kulandelwe ukukhishwa ngamanzi noma nge-ethanol yezinga lokudla, ukuhlunga, ukuhluzwa, kanye nezinye izinyathelo zokucwenga.
Eminye imikhiqizo icutshungulwa ibe yimpuphu ngokuyifutha ngokuyifafaza ngokwengeza izinto ezisizayo njenge-maltodextrin. Izingxenye zayo eziyinhloko zifaka phakathi ama-glucoside e-anthocyanin njenge-malvidin, i-peonidin, i-delphinidin, ne-petunidin-3'-glucoside, kanye nama-flavonoid. Lawa ma-compound awagcini nje ngokunquma amandla ayo okufaka umbala kodwa futhi anegalelo ezimpahleni zayo ezingokwemvelo ze-antioxidant.
Izakhiwo ze-physicochemical ze-red colorant yesikhumba samagilebhisi zihlukile: ukubukeka kwayo kusuka kubomvu ojulile kuya ku-purple-red powder, kanye nezinhlobo zoketshezi kanye ne-paste ezitholakalayo, ezihambisana nephunga elincane elihlukile. Incibilika kakhulu emanzini, i-ethanol, i-propylene glycol, nezinye izinyibilikisi kodwa ayincibiliki emafutheni, emafutheni, kanye ne-ethanol ephelele. Umbala wayo uncike kakhulu kwi-pH—ubonisa umbala oqinile, obomvu okhanyayo kuya kobomvu onsomi ngaphansi kwezimo ze-asidi, ushintshela kuluhlaza okwesibhakabhaka ezindaweni ezingathathi hlangothi, futhi uphenduke uluhlaza okungalingani ezindaweni ze-alkaline.
Ngaphezu kwalokho, inokubekezelela okulinganiselwe ukukhanya nokushisa; ukuchayeka isikhathi eside ekukhanyeni okunamandla noma amazinga okushisa aphezulu kungabangela ukufiphala kombala. Uma kukhona ama-ion ensimbi njengensimbi nethusi, ingase ibe mnyama ibe nsundu ngokunsomi, futhi ithambekele ekushintsheni kombala ngenxa ye-oxidation, ngamandla ombala aphakathi kanye nokumelana nokushisa jikelele.














