Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Use of Chemicals to Control and Destruct Microorganisms?
Ans.
The use of chemicals, as a process of food preservation, has been used since long, ever since man found them by trial and error to be beneficial to him. Sodium chloride or the common salt has been the oldest compound which has been serving the purpose since several centuries. Apart tiom sodium chloride, other chemicals which were being used include salt peter, slaked lime etc. The salt peter (sodium and potassium nitrate) in combination with common salt was used to impart flavour and keeping quality of meats. All these compounds can be termed as a preservative.
Now, then, how would you define a chemical preservative? Let us find out. A chemical preservative is a substance which is capable of either inhibiting, retarding or arresting decomposition of foods. The use of chemicals as preservative has been subjected to criticism due to their indiscriminate use and the likely hazard they pose to the human health. The process of preservation by the addition of chemicals to foods has to be undertaken, keeping in mind the usefulness and limitations in affecting human health.
International organizations, such as the Food and Agriculture Organization (FAO) and World Health Organization (WHO), have defined limits for each chemical to be used as a preservative. The Government of India regulates the use of various additives in foods. The use of chemicals has to be employed, if it is an economical means of preservation and only when other physical means like pasteurization etc. are not possible or other methods of preservation are not available. The preservative should extend the storage life of the product and at the same time, not affect the quality and be an antimicrobial agent. It also should not be converted to other toxic compounds on reaction with the food commodity. We will learn more about chemical preservatives later in this Course in Unit 7. But here we must understand how do these preservatives extend the storage life of the product. Remember, the chemical preservatives serve as antimicrobial agents by acting as growth inhibiting 'or growth retarding agents or by killing the microorganisms. The action of most chemical agents on microbes include their effectiveness either by their effect on their genetic functions by: (a) interacting with the DNA molecules (b) acting upon the cell wall (c) inhibiting the microbial cell enzymes, and (d) making the essential nutrient unavailable to the microorganisms.
S h o c k It is defined as a generalized acute reduction in the perfusion of tissues by which there is oxygen deficiency in the cells. It is characterized by reduction in e
Define Requirements of Fluid in Postoperative Nutritional Care Extensive fluid losses may occur through vomiting, haemorrhage, diesis, excudate, fever and sweating after a surg
Q. Control of Aflatoxin? Control: Because aflatoxins are potentially widespread in occurrence and have an insidious combination of acute and chronic toxicity, it is prudent to
Chest and Leg Wound Complications : The patients under going CABG are usually elderly, obese and nearly a quater of them are diabetic. So sonic of them get superficial or d
What is a Food Allergy (Hypersensitivity)? A food allergy or hypersensitivity is an abnormal response to a food by our immune system. As illustrated in Figure, this non-toxic a
What is the main evolutionary novelty presented by annelids? The main evolutionary novelty shown by the beings of the phylum Annelida is the coelom, the internal body cavity to
What is the function of a control group in an experiment? The function of a control group in an experiment is to be a stable to account for any effects a given environment has
Nuclear run-on is a technique used to estimate the relative rate of the transcription of a given gene, as opposed to steady-state level of the mRNA transcript (which is influenced
What is Glands? The central nervous system controls much of the endocrine system through the hypothalamus. The hypothalamus directs many of the body's functions through the "ma
Describe the general examination of clinical examination? It is always to better to ask the patient to help himself/herself in setting on to the examination table and rename so
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd