Lactic Acid
Lactic acid is used as permitted food additive. Lactic acid can be obtained either by fermentation of carbohydrates or by chemical process from acetaldehyde and hydrogen cyanide and subsequent hydrolysis. Lactic acid is used in sugar confectionery to make perfectly clear sweets with minimum sugar inversion and with no air trapped , and used in bakery for direct acidification of bread. Lactic acid increases the stability and volume of butter.Used in jams, jellies and frozen fruit desserts. Widely used in preserving fruits and inhibits discoloration of fruits and some vegetables.
Carob bean gum
Carob bean gum is obtained from carob bean ( Ceratonia siliqua) , a mediterranean tree. It is a natural plant based vegan food thickener used in many products. It is an excellent vegan thickener that add structure and stability to vegan desserts, such as non diary ice cream and yogurt. In freez-dried vegetables carob been gum helps to enhances the crispiness of rehydrated products.
Potassium sorbate
Potassium sorbate is synthetically produced from sorbic acid and potassium hydroxide. It is a commonly used food additive used to prevent spoiling of food from bacteria, mold and yeast. It is used as a preservative in fruit juices, cheese, mayonnaise, nuts, olives, jellies and jams. Used as a preservative in meat, fish and egg based products, and flavoured dairy products. Potassium sorbate is commonly used as wine stabilizer to reduce the possibility of re-fermentation.
Sorbic acid
Sorbic acid is a naturally occuring food preservative. Sorbic acid controls the growth of yeast and molds thereby increases the shelf life of food products. It is used as a preservative in dairy products like cheese and yogurt, dried fruit, fish pickles, meat, jelly, soups, wine, beer, soft drinks, breads, bagels and pastries.
Function GRAS/FS - Additive Lactic acid Carob Bean Gum Potassium sorbate Sorbic acid
7. Lactic acid (CSH COOH) is a weak monoprotic acid whose K, value is 1.4x10". Its salt potassium lactate is added to food products as a preservative and to inhibit growth of bacteria. What is the pH of a solution whose molar concentration of potassium lactate (CSHCOO-K) is 0.290 M? Caution! This problem does not say that lactic acid is dissolved in water, it is potassium lactate that is added to the water.
Equal volumes of 200 mM lactic acid and 200 mM potassium lactate are mixed to make a buffer. The pKa of lactic acid is 3.86 (a) Determine the pH of this buffer and its final concentration. [4 marks] (b) Calculate the concentrations of the buffer components after acid or base is added to bring the pH to 4.5. Assume a negligible change in volume. 6 marks]
A buffer is made by adding 0.350 mol lactic acid, CH3CH(OH)COOH, and 0.350 mol potassium lactate, CH3CH(OH)COOK, to enough water to make 1.10 L of solution. The pKa is equal to 4.24. Calculate the pH of this solution after 3.0 mL of 3.0 M KOH is added to the buffer.
One function of both alcohol fermentation and lactic acid fermentation is to A. reduce FAD+ to FADH2. B. oxidize NADH to NAD+. C. reduce NAD+ to NADH. D. reduce FADH2 to FAD+. E. None of these answers are correct
QUESTION 30 One function of both alcohol fermentation and lactic acid fermentation is to O A. reduce FAD+ to FADH2. B: oxidize NADH to NAD+ C. reduce NAD+ to NADH. D. reduce FADH2 to FAD+. E. None of these answers are correct