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Explain about Cold Preservation - methods of food processing?
The metabolism of a living tissue is a function of the temperature of the environment. Low temperatures are used to retard chemical reactions and action of food enzymes and slow down or stop growth and activity of microorganisms in the food. Lower the temperature, the slower will be the above natural activities. Freezing and refrigeration are among the oldest methods of preservation. Mechanical ammonia refrigeration systems invented during 1875 allowed development of commercial refrigerated warehousing and freezing.
evolution of metazoa
GROWTH AT DIFFERENT LEVELS - 1. Molecular level - It involves synthesis of new molecules and their aggregation into organellae. 2. Cellular level - It includes
Q. How many chambers does the fish heart have? The fish heart is a tube made of two consecutive chambers such as one ventricle and one atrium.
A decrease in blood plasma levels of parathyroid hormone A. occurs in response to an increase in the levels of calcium ions in blood plasma. B. leads to an increase in the a
A n t h r a x It is also known as spleenic fever. The peracute form of the disease in animals is manifested by sudden death with oozing of dark-coloured blood from body o
A restriction map of plasmid and a human gene of identified sequence is demonstrated below. Your job is to clone the human liver cDNA for that gene than the start codon is closer t
Natural selection is such a powerful force in evolution because cells with even a small growth advantage quickly outgrow their competitors. To illustrate this process, consider a b
In a school laboratory, what is usually regarded as evidence that photosynthetis has occurred in a plant
Accidents and Losses Accident can be considered as an incident occurring without intention and results in injury, loss of body part or even death of a human being or a few per
A large leaf on a plant in bright sunshine evaporates 5 grams of water per hour. Cooling the leaf through evaporation in this manner enables the plant to eliminate heat energy at t
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