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Explain Animal sources of Novel Sources of Natural Colourants
The most common animal pigments of use as food colourants are those based on the haem structure. In nature, haem is combined with proteins and occurs mainly as haemoglobin and myoglobin. Although the appearance of these two components is attractive when they are oxygenated (bright red), the colour produced on heating is typically brown (e.g. cooked meat) and removal of oxygen in the native state gives rise to the blue/purplish colour of venous blood. The colour changes are due to the oxidation state of the central iron atom in the haem portion of the molecule and the nature of ligands surrounding the iron atom. The bright red colour of freshly cut meat is due to oxygen binding as a ligand to the iron atom which is in the ferrous state. However, oxygen does not bind very strongly and it is known that other ligands bind more strongly, stabilizing the molecule and preserving the red colour.
Asteroid impacts: The hypothesis which links certain mass extinction events with the impact of the comet or asteroid, most particularly the mass extinction 65 million years which
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Explain Herbals of Brunfels? Between the years 1530 and 1536 Otto Brunfelsius (Brunfels) (1463-1534) published his 'Herbal' which consisted of descriptions of a large number of
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What happens during aerobic respiration to the pyruvic acid molecules made by glycolysis? What is the sequence of reactions that then follows? The pyruvic acid molecules made i
What is A biologic Failure A biologic Failure can be defined as the inadequacy of the host to establish or to maintain osseointegration. The inability to establish osseoint
Trace the flow of blood through the systemic circuit (hepatic portal system) and the pulmonary circuit, beginning and ending in the left ventricle . You will be using named chamb
Describe the factors that are involved in the regulation of respiration in a child who decides to hold his/her breath for as long as possible.
Q. What is the prothallus of pteridophytes? The gametophyte develops by mitosis from a spore and Prothallus is the pteridophyte gametophyte (the haploid individual that forms g
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