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Explain Use of food Additives - method of food preservation?
Food additives may be defined as substances added intentionally to food, generally, in small quantities to improve its appearance, flavour, texture or storage properties. These may be classified into different broad groups. Those food additives, which are specifically added to prevent the deterioration or decomposition of a food, have been referred to as chemical preservatives. In food preservation, the added substances may be grouped into two. The first one includes the use of sugar, salt, spices, acetic acid (vinegar) and alcohol, and is referred to as class I preservatives and is considered to be relatively safe to humans. The second group includes the use of benzoic acid, sulfur dioxide, nitrates and nitrites and a variety of neutralizers, firming agents and bleaching agents and referred to as class II preservatives and is considered to be relatively safe to humans, but within the permissible doses prescribed by the Food Regulatory bodies because higher concentrations can be a health hazard. Preservation of foods by the chemicals is effected by interfering with the cell membrane of the microorganism, their enzyme activity and genetic mechanism; by acting as antioxidants.
Explain the Properties gum karaya Gum karaya is water-swellable rather than water-soluble and absorbs water very rapidly to form viscous colloidal dispersions at low concentra
briefly explain pinocytosis
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Particulate Theory (i) Maupertuis (1689-1759) proposed that the body of each parent give rise to minute particles. (ii) In sexual reproduction, these particl
Q. Show the Factors affecting osseointegration? The success or failure of osseointegration is dependent on the following factors. a) Occlusal load b) Biocompatibility of
Oxygen - Aquatic Ecosystem Oxygen is found in waters in dissolved form. It enters the aquatic ecosystem through the air water interface and by the photosynthetic activities of
Explain the Competitive behaviour of social animal group dominance behaviours removal of individuals to other groups which minimises inbreeding eg lions, apes.
REPRODUCTIV E ISOLATION - According to the biological species concept, members of one species are reproductively isolated from members of all other species. Accordingly, re
CHF complicating IE is primarily the result of valve destruction or distortion or rupture of chordae tendinae. Intracardiac fistulas, myocarditis, or coronary artery embolization m
define cytoplasm
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