Broth thiab Tshuag ua si lub luag haujlwm tseem ceeb hauv kev ua noj. Lawv tsis yog tsuas yog qab cov ntsiab lus, tab sis kuj tseem muaj cov ntsiab cai muaj teeb meem nplua nuj.
Lub hauv paus ntsiab lus ntawm kev ua si broth yog muab tau los ntawm hydrolysis ntawm cov protein ntawm cov protein. Thaum nqaij yog stewed nrog dej, cov protein hauv cov nqaij maj mam decomposes. Ua ntej, cov protein ntau xws li myosin thiab actin hauv cov nqaij pib tsis lees raws li cov cua kub. Raws li lub sijhawm stewing nce, qee cov proteolytic enzymes tawg cov protein no ua rau cov molecules me me ntawm peptides thiab amino acids. Cov me me molecules tsis tsuas yog muab cov broth ib qho qab qab qab, tab sis kuj nce cov kua txiv ntawm cov kua zaub. Piv txwv li, monosodium glutamate, ib umami muaj cov khoom siv umami, yog ib txwm tsim tawm hauv broth, txhawb nqa lub saj buds thiab ua rau peb hnov tus nplua nuj umami saj.
Collagen kuj tseem ua lub luag haujlwm tseem ceeb hauv kev tsim ntawm cov kua zaub. Ntev ntev cov stewing yuav lwj siab rau hauv gelatin, uas ua rau lub kua zaub thicker thiab tuaj yeem qhwv cov roj ua kom tsis txhob muaj roj los tiv thaiv kom tawg, ua kom lub broth saj.
Lub luag hauj lwm ntawm kua zaub Tshuag yuav tsum tsis txhob ua rau muaj kev xav txog ib qho twg. Cov txuj lom thiab seasonings hauv kua zaub Tshuag muaj lawv tus kheej cim tshuaj lom neeg muaj pes tsawg leeg. Piv txwv li, cov khoom xyaw xws li shikimic acid muaj nyob rau hauv lub hnub qub anise tuaj yeem tso cov aroma molecules tshwj xeeb thaum cua sov. Ntxiv nrog rau cov nyhuv seasonures, ntsev kuj tuaj yeem hloov kho solubility thiab gel cov khoom ntawm cov protein hauv cov kua zaub.
Ib qho ntxiv, lub luag haujlwm ntawm cov khoom xyaw sib txawv hauv kua zaub kuj txawv. Zaub kua zaub Tshuag tuaj yeem muab cov vitamins thiab zaub mov nplua nuj. Thaum nce khoom noj khoom haus, nws tus kheej cov dej hauv dej thiab cov kua ntawm tes muaj pes tsawg leeg yuav cuam tshuam rau tsw thiab saj ntawm cov kua zaub. Hauv ntej, kev npaj ntawm broth thiab kua zaub Tshuag yog ib tug ua noj ua haus raws li kev tshawb fawb keeb kwm kev tshawb fawb. To taub cov ntsiab cai no pab tau peb ua cov kua zaub tseem qab.
