Food Processing and preservation Quiz 24

Q. Which of the following compounds acts as both synergists and antioxidants

1. Ascorbic acid
2. Citric acid
3. Phosphoric acid
4. Tartaric acid

Answer: a)

Oxygen scavengers which react with oxygen and remove it (ascorbic acid and its derivatives).

Q. Sucrose esters are

1. emulsifiers
2. antimicrobial agents
3. Both a and b
4. None of the above

Answer: c)

Sugar fatty acid esters (also more simply known as sugar esters) have great potential for multiple uses in the food industry. Significant numbers of research studies have identified key roles sugar esters can play in food systems, from emulsification activity to also acting as antimicrobial agents. Sugars can be used to synthesize esters with a wide range of different fatty acids. The most common fatty acids used in synthesis in the literature are lauric, myristic, palmitic, stearic, oleic, behenic and erucic acids. Although it has been shown that sugar esters inhibit bacterial growth and promote emulsion formation and/or stabilization, there is a lack of consensus as to how the length of fatty acid chains in sugar esters influence these properties.

Q. Cyclamate is

1. a leavening agent
2. an antimicrobial agent
3. a non-nutritive sweetener
4. All of the above

Answer: c)

Nonnutritive sweeteners are zero- or low-calorie alternatives to nutritive sweeteners, such as table sugar. Artificial sweeteners are identified as non-nutritive sweeteners by the American Heart Association. Saccharin, cyclamates, aspartame, acesulfame-K are some of the widely used non-nutritive sweeteners. Aspartame, Acesulfame-K, Neotame, Saccharin and Sucralose have GRAS status.

Q. Calcium stearate is used as an

1. anticaking agent
2. antifungal agent
3. antifoaming agent
4. antibacterial agent

Answer: a)

Calcium stearate is recognized as physiologically safe, and is insoluble in most solvents. Compared to waxes, it has a relatively high softening point, and, consequently, do not become greasy at higher temperatures. Calcium stearate is primarily used as an acid scavenger, release agent and lubricant in the plastics industry, for waterproofing in construction,

and as an anti-caking additive in pharmaceuticals and cosmetics. In addition, Baerlocher has developed special thermostable calcium stearate products designed to withstand exceptionally high temperatures.

Q. Which chemical preservative is added to tomato sauce to extend the shelf life

1. Sodium benzoate
2. Calcium propionate
3. Tocopherol
4. All of the above

Answer: a)

Sodium Benzoate is used in the preparation of sauce as preservative.