Roj ncuav nrog cov khoom sib txawv

Mar 22, 2022

Cov roj sib txawv- muaj cov khoom siv raw, raws li lawv tus kheej cov yam ntxwv, cov roj ncuav mog qab zib tau txais tom qab nias kuj yuav siv ntau yam. Feem ntau, oilseeds cultivated mas rau roj extraction yog rapeseed thiab sunflower, rau cov proteins yog soybean thiab fibers yog paj rwb. Lawv undergo preprocessing ua ntej nias, xws li: ntxuav, dehulling thiab roasting (kev puas tsuaj ntawm cov kab mob thiab roj cell, enzymes inactivation, coagulation ntawm cov protein), thiab ces raug rau roj extraction. Txhua theem ntawm cov txheej txheem no tsim cov khoom pov tseg ntau dua lossis tsawg dua nrog cov khoom seem bioactive uas tuaj yeem rov qab tau.

The two traditional methods to extract oil involve either the use of a mechanical press (hot and cold pressing) or a solvent. When the process is mechanical, the oilseeds are heated (around 100-120 degrees) and the oil is extracted with a screw oil press. Alternately, in cold pressing, the temperature of heating is kept at 60–80 degrees. After the extraction of oil from seeds, the principal by-product obtained is oil cakes. They are classified into two categories—edible and non-edible. And today, we will focus on edible oil cakes:

Cov roj ncuav mog qab zib ntawm oybean, av txiv ntoo, rapeseed, paj noob hlis, txiv maj phaub, safflower thiab flaxseed muaj cov khoom noj muaj txiaj ntsig zoo thiab tuaj yeem siv rau hauv tsiaj thiab tib neeg noj raws li cov khoom xyaw ua tiav (cov protein ntau), cov substrate (hauv kev tsim cov bioactive compounds) thiab qhov chaw ntawm antioxidants. Cov ntsiab lus siab tshaj plaws hauv cov protein tau pom nyob rau hauv cov ncuav mog qab zib tom qab taum soybean, almond, chia, rapeseed, sunflower, cottonseed, taub dag, hemp, safflower, sesame, txiv maj phaub, flaxseed thiab txiv roj roj.

Hauv kev xaus, cov ntaub ntawv oily tshaj plaws, sib nrug los ntawm lawv cov txiaj ntsig tseem ceeb tshaj plaws: kom tau txais cov roj, lawv cov dross kuj tseem siv tau los ua kom tau nyiaj ntau tshaj plaws.