I-Vitamin C (Ascorbic Acid) Cas: 50-81-7
| Inombolo Yekhathalogi | XD91869 |
| Igama Lomkhiqizo | I-Vitamin C (Ascorbic Acid) |
| I-CAS | 50-81-7 |
| Ifomu le-Molecularla | C6H8O6 |
| Isisindo samangqamuzana | 176.12 |
| Imininingwane Yesitoreji | 5-30°C |
| Ikhodi Yentela Evumelanisiwe | 29362700 |
Ukucaciswa Komkhiqizo
| Ukubukeka | Impushana emhlophe |
| U-Asay | 99% iminithi |
| Iphoyinti lokuncibilika | 190-194 °C (dec.) |
| i-alpha | 20.5 º (c=10,H2O) |
| Iphuzu elibilayo | 227.71°C (isilinganiso esinzima) |
| ukuminyana | 1,65 g/cm3 |
| inkomba ye-refractive | 21 ° (C=10, H2O) |
| ukuncibilika | I-H2O: 50 mg/mL ku-20 °C, icacile, cishe ayinambala |
| pka | 4.04, 11.7(ku-25℃) |
| PH | 1.0 - 2.5 (25℃, 176g/L emanzini) |
| PH Ububanzi | 1 - 2.5 |
| Iphunga | Ayinaphunga |
| umsebenzi optical | [α]25/D 19.0 kuya ku-23.0°, c = 10% ku-H2O |
| Ukuncibilika kwamanzi | 333 g/L (20 ºC) |
| Ukuzinza | Izinzile.Kungase kube ukukhanya okubuthakathaka noma ukuzwa umoya.Akuhambisani nama-oxidizing agents, ama-alkali, insimbi, ithusi. |
Isiqalo sokuhlanganiswa kwevithamini C ukukhetha kwe-oxidation yenhlanganisela ushukela D-sorbit kuya ku-L-sorbose kusetshenziswa amagciwane e-Acetobacter suboxidans.I-L-sorbose bese iguqulwa ibe yi-L-ascorbic acid, eyaziwa kangcono nge-vitamin C.
Usawoti we-sodium, i-potassium, ne-calcium we-ascorbic acid ubizwa ngokuthi ama-ascorbates futhi asetshenziswa njengezilondolozi zokudla.Ukwenza i-ascorbic acid encibilike ngamafutha, ingafakwa esterified.Ama-Esters e-ascorbic acid nama-acids, afana ne-palmitic acid ukuze akhe i-ascorbyl palmitate ne-stearic acid ukuze enze i-ascorbic stearate, asetshenziswa njengama-antioxidants ekudleni, kwezemithi, nasezintweni zokugcoba.I-Ascorbic acid nayo ibalulekile kumetabolism yamanye ama-amino acid.Isiza ukuvikela amangqamuzana ekulimaleni kwama-radical mahhala, isiza ukumuncwa kwensimbi, futhi ibalulekile ezinqubweni eziningi ze-metabolic.
I-Vitamin C iyi-anti-oxidant eyaziwa kakhulu.Umthelela wayo ekubunjweni kwama-free-radical uma isetshenziswe ngokusemthethweni esikhumbeni ngokusebenzisa ukhilimu awuzange usungulwe ngokucacile.Ukusebenza kahle kokusetshenziswa kwezihloko kuye kwabatshazwa ngenxa yokungaqini kahle kukavithamini C (uhlangana namanzi futhi uwohloke).Ezinye izinhlobo kuthiwa zinokuzinza okungcono ezinhlelweni zamanzi.Ama-analogues okwenziwa njenge-magnesium ascorbyl phosphate aphakathi kwalawo athathwa njengesebenza kakhulu, njengoba evame ukuzinza.Lapho kuhlolwa ikhono layo lokulwa nomonakalo wamahhala ngenxa yomphumela wawo wokuhlangana novithamini E, uvithamini C uyakhanya.Njengoba i-vitamin e iphendula nge-radical yamahhala, yona, yonakaliswa yi-free radical elwa nayo.I-Vitamin C ingena ukuze ilungise umonakalo wamahhala kuvithamini E, ovumela u-e ukuthi aqhubeke nemisebenzi yawo yokukhipha ama-radical mahhala.Ucwaningo lwangaphambilini lubonise ukuthi ukugxila okuphezulu kukavithamini C osetshenziswe phezulu kuyi-photoprotective, futhi ngokusobala ukulungiswa kwamavithamini asetshenziswa kulezi zifundo amelana nensipho namanzi, ukuwashwa, noma ukuhlikihlwa izinsuku ezintathu.Ucwaningo olwengeziwe lwamanje luveze ukuthi uvithamini C uyasengeza isivikelo emonakalweni we-UVB uma ehlanganiswa namakhemikhali okuvikela ilanga e-UVB.Lokhu kungaholela ekubeni umuntu aphethe ngokuthi lapho ehlanganiswa nezinto ezivamile zokuvikela ilanga, uvithamini C angase avumele isivikelo elangeni esihlala isikhathi eside, esibanzi.Futhi, ukusebenzisana phakathi kwamavithamini C no-e kungaveza imiphumela engcono nakakhulu, njengoba ngokusobala inhlanganisela yakho kokubili inikeza isivikelo esihle kakhulu emonakalweni we-uVB.Nokho, uvithamini C ubonakala engcono kakhulu kuno-e ekuvikeleni emonakalweni we-UVA.Esinye isiphetho siwukuthi inhlanganisela kavithamini C, u-e, kanye nemithi evikela elangeni inikeza isivikelo esikhulu kunesamba sesivikelo esinikezwa yinoma yiziphi izithako ezintathu ezisebenza zodwa.I-Vitamin C futhi isebenza njengomlawuli we-collagen biosynthesis.Kwaziwa ngokulawula izinto ze-intercellular colloidal ezifana ne-collagen, futhi uma zenziwe ezimotweni ezifanele, zingaba nomthelela wokukhanya kwesikhumba.I-Vitamin C kuthiwa iyakwazi ukusiza umzimba ukuthi uqine ngokumelene nezimo ezithathelwanayo ngokuqinisa amasosha omzimba.Kunobunye ubufakazi (nakuba kuphikiswana ngakho) bokuthi uvithamini C angadlula ezingqimbeni zesikhumba futhi akhuthaze ukuphulukiswa kwezicubu ezilinyazwe ukusha noma ukulimala.Ngakho-ke, itholakala kumafutha okugcoba ashisayo nama-creams asetshenziselwa imihuzuko.I-Vitamin C ibuye idume emikhiqizweni elwa nokuguga.Ucwaningo lwamanje lubonisa izici ezingaba khona zokulwa nokuvuvukala.
I-antioxidant ye-Physiological.I-Coenzyme yenombolo yokusabela kwe-hydroxylation;edingekayo ukuze kuhlanganiswe i-collagen.Kusatshalaliswa kabanzi ezitshalweni nasezilwaneni.Ukungadli kahle kubangela ukushoda kwe-syndromes njenge-scurvy.Isetshenziswa njenge-antimicrobial kanye ne-antioxidant ekudleni.
