Qhov txawv ntawm Guar thiab Xanthan Gum yog dab tsi

Guar cov pos hniav thiab xanthan cov pos hniav yog ob hom hydrocolloids feem ntau siv los ua khoom noj khoom haus thiab cov khoom ua kom tuab. Thaum lawv qhia qee qhov zoo sib xws hauv lawv txoj haujlwm, kuj tseem muaj qhov sib txawv tseem ceeb ntawm ob:

1. Qhov chaw:

• Guar Gum: Guar gum yog muab los ntawm cov noob ntawm cov nroj tsuag guar (Cyamopsis tetragonoloba), uas yog nyob rau hauv Is Nrias teb thiab Pakistan. Cov noob tau ua tiav los rho cov pos hniav, uas tom qab ntawd ntxuav thiab siv ntau yam kev siv.
• Xanthan Gum: Xanthan cov pos hniav yog tsim los ntawm fermentation los ntawm cov kab mob Xanthomonas campestris. Cov kab mob ferment carbohydrates, xws li qabzib lossis sucrose, los tsim xanthan cov pos hniav. Tom qab fermentation, cov pos hniav yog precipitated, qhuav, thiab av rau hauv ib tug nplua hmoov.

2. Chemical Structure:

• Guar Gum: Guar cov pos hniav yog galactomannan, uas yog polysaccharide tsim los ntawm cov kab sib txuas ntawm mannose units nrog qee zaus galactose ceg.
• Xanthan Gum: Xanthan cov pos hniav yog ib qho hetero-polysaccharide uas muaj cov piam thaj, mannose, thiab glucuronic acid, nrog rau cov saw hlau ntawm acetate thiab pyruvate.

3. Solubility:

• Guar Gum: Guar cov pos hniav yog soluble hauv dej txias tab sis tsim cov kua nplaum uas muaj kuab heev, tshwj xeeb tshaj yog nyob rau ntau dua. Nws yog feem ntau siv los ua tus neeg sawv cev thickening nyob rau hauv ntau yam khoom noj thiab kev lag luam.
• Xanthan Gum: Xanthan cov pos hniav yog soluble nyob rau hauv ob qho tib si txias thiab dej kub thiab nthuav tawm tus cwj pwm pseudoplastic, txhais tau tias nws viscosity txo nrog shear stress. Nws tsim cov gels ruaj khov nyob rau hauv muaj qee yam ions, ua rau nws haum rau ntau yam kev siv.

4. Viscosity thiab Texture:

• Guar Gum: Guar cov pos hniav feem ntau imparts siab dua viscosity rau cov kev daws teeb meem piv rau xanthan cov pos hniav. Nws feem ntau yog siv los muab kev ntxhib los mos, creamy zoo nkauj hauv cov khoom noj xws li kua ntses, hnav khaub ncaws, thiab lwm yam khoom noj siv mis.
• Xanthan Gum: Xanthan cov pos hniav muaj qhov zoo tshaj plaws ncua kev kawm ntawv thiab ruaj khov, tsim kom muaj cov kua nplaum nplaum nrog cov ntaub nplaum ntau dua. Nws yog feem ntau siv rau hauv gluten-dawb ci ci, hnav khaub ncaws hnav, thiab cov khoom siv mis nyuj los txhim kho kev ntxhib los mos thiab qhov ncauj.

5. Kev ruaj ntseg:

• Guar Gum: Guar cov pos hniav yog rhiab rau pH thiab kub hloov, thiab nws viscosity yuav txo qis nyob rau hauv acidic tej yam kev mob los yog kub kub.
• Xanthan Gum: Xanthan cov pos hniav nthuav tawm kev ruaj ntseg zoo dua li ntau yam ntawm pH qhov tseem ceeb thiab qhov kub thiab txias, ua rau nws tsim nyog rau cov ntawv thov uas xav tau lub sijhawm ntev txee thiab kev ua haujlwm.

6. Synergistic Effects:

• Guar Gum: Guar cov pos hniav tuaj yeem pom muaj txiaj ntsig zoo thaum ua ke nrog lwm cov hydrocolloids xws li locust taum cov pos hniav lossis xanthan cov pos hniav. Qhov kev sib xyaw ua ke no txhim kho viscosity thiab ruaj khov, tso cai rau kev tswj hwm ntau dua ntawm kev ntxhib los mos thiab qhov ncauj qhov ntswg hauv cov khoom noj.
• Xanthan Gum: Xanthan cov pos hniav feem ntau yog siv ua ke nrog lwm cov hydrocolloids los yog thickeners kom ua tiav cov kev ntxhib los mos thiab rheological zog hauv cov khoom noj.

Hauv cov ntsiab lus, thaum ob qho tib si guar cov pos hniav thiab xanthan cov pos hniav ua haujlwm ua cov neeg ua haujlwm thickening thiab stabilizers hauv cov khoom noj thiab cov ntawv thov kev lag luam, lawv txawv ntawm lawv qhov chaw, tshuaj qauv, solubility, viscosity, stability, thiab texture-modifying zog. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau kev xaiv cov pos hniav uas tsim nyog rau cov qauv tsim tshwj xeeb thiab ua tiav cov yam ntxwv ntawm cov khoom xav tau.