Qhov sib txawv ntawm tus nqi kua qaub thiab tus nqi peroxide
Vim tias ntau zaus thaum kuaj roj lossis zaub mov, tus nqi kua qaub thiab tus nqi peroxide tau hais ua ke, thiab tib neeg feem ntau txhawj xeeb txog kev sib raug zoo ntawm cov kua qaub thiab tus nqi peroxide.
Dab tsi yuav tsum tau piav qhia ntawm no yog tias tus nqi kua qaub thiab tus nqi peroxide yog ob qho kev ntsuas rau kev ntsuas cov roj zoo, tab sis tsis muaj qhov sib raug zoo ntawm ob qho tib si. Peb tuaj yeem pom qhov sib txawv ntawm ob los ntawm cov hauv qab no:
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Yam khoom |
Acid Tus nqi |
Tus nqi Peroxide |
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Tswv yim |
Ib qho qhia txog qib roj deterioration Tus naj npawb ntawm milligrams ntawm poov tshuaj hydroxide yuav tsum tau neutralize 1 gram ntawm tshuaj. |
Ib qho qhia txog qib ntawm oxidation ntawm cov roj thiab fatty acids, tus nqi peroxide yog siv los txiav txim lawv qhov zoo thiab qib ntawm kev puas tsuaj. |
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Piav txog yam khoom |
Acid tus nqi uas tuaj yeem cuam tshuam los ntawm cov rog thiab roj hauv cov khoom noj |
Cov pa roj carbonyl pawg hauv cov khoom noj lossis cov rog uas ntsuas tau |
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Kev txhais |
Thawj feem ntawm cov roj rancidity: cov txheej txheem enzymatic hydrolysis ntawm cov roj, roj yog ncaj qha hydrolyzed rau hauv glycerol thiab fatty acids. Qhov thib peb ntawm cov roj rancidity: peroxide yog ntxiv oxidized rau hauv qis aldehydes, ketones, thiab acids. |
Qhov thib ob ntawm cov roj rancidity: ob daim ntawv cog lus ntawm unsaturated fatty acids nyob rau hauv cov roj yog oxidized thiab qhib rau peroxides. |
Thaum lub sij hawm spoilage txheej txheem ntawm cov zaub mov los yog roj, cov kua qaub thiab peroxide tus nqi tuaj yeem tshwm sim nyob rau tib lub sijhawm, tab sis thaum kawg ntawm rancidity yuav tsuas muaj cov kua qaub tab sis tsis muaj nqi peroxide.
Thaum cov roj yog unsaturated acid, tus nqi peroxide yuav tshwm sim ua ntej thiab tom qab ntawd tus nqi acid. Tus nqi acid yuav nce ntxiv, thaum tus nqi peroxide yuav nce thiab poob (tsis sib npaug).
