Kategorier: Alle - expansion

av Teoh Lee Yuan 4 år siden

320

MISCELLANEOUS INGREDIENTS

Certain substances are essential in food processing to maintain quality and texture. Humectants are hygroscopic and help retain moisture in products by lowering vapor pressure, making them ideal for dried foods and frozen desserts.

MISCELLANEOUS
INGREDIENTS

MISCELLANEOUS INGREDIENTS

CHELATING AGENT

EDTA

Only effective when the usage level is low

Acidulants

Effective for calcium, magnesium and sodium

Bind with metal ions thus make them unavailable for destructive reactions such as discolouration & rancidity

LEAVENING AGENT

Steam
Yeast

By product: CO2

Fermentation starts when yeast acts on sugar

Through fermentation process

Baking powder/ baking soda

Releasing CO2 during expansion

Powder/ soda mix with acid

Air

Forming foam when air bubble is incoporated

Through vigorous mixing

Substances that results in expansion of dough & batter through releasing of gases within mixture

HUMECTANTS

Polydextrose

Reduce the migration of water molecules

Has slightly bitter taste

Attracts the water

Lower the aw

Lower the equilibrium vapour pressure of food

Sorbitol
Propylene glycol
Glycerine

Suitable for sweet or bland taste of food

Help the fruit pieces to remain soft in frozen desserts

Depress the freezing point

To lower the vapour pressure of food thus retaining moisture

Used in dried foods such as dried fruits, jelly candy, fruit fillings

Hygroscopic substance which promotes the retention of water thus keeping the product moist.

ANTICAKING AGENT

Examples
Sodium aluminosilicate
Talcum powder
Bentonite
Calcium stearate
Calcium carbonate
Calcium silicate
Functions
adsorb excessive moisture
Coat the particles to make them water repellent
Prevent formation of clumps