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Evaluate the Moisture Requirement - The Concept of Water Activity
We already know that moisture is one of the important factors for the survival of living species. As such, it has a great influence on them, including microorganisms like bacteria. Water accounts for 80-90% of the total weight of cells. The water requirement of bacteria varies fiom species to species. Although water is required by bacteria, the growth largely depends upon the available water, which can be utilized for the growth of microorganisms. This is expressed as water. activity which is defined as the percent equilibrium relative humidity (%ERH) divided by 100. ERH is an expression of the amount of free water vapour present on a product, both at its surface and within its structure. Numerically, ERH of a food divided by 100 equals "Water Activity". This can be represented by the following equation:
water Activity (aw) = Equilibrium Relative Humidity/100
Define Reagents for Determination of the Iodine Number of Lipids? The following reagents are required to conduct this experiment. 1. Hanus solution (Iodine monobromide solut
Q. Which Of the substances is chromatin made? Chromatin is made of the DNA molecules associated to proteins known as histones.
FORMATION OF SOIL Evolution of Earth took place five to eight billion years ago when it was a red hot magma (molten rock). It took millions of years for the magma to cool down
PHOSPHOLIPIDS Most abundant lipid present in cell membrane, also called membrane lipid. It is made up of lipid & phosphoric acid. The basic phospholipid is phosphat
Explain the Nerve Cell Structure and Function? Before studying the organization of the nervous system, we will look at the relationship between structure and function of nerve
A genomic DNA library is made from the genomic DNA of an organism. For instance, a mouse genomic library could be made by digesting mouse nuclear DNA with a restriction nuclease to
What is the difference between ectoparasite and endoparasite? Ectoparasites are parasites that explore the external surface of the host (as, for example, mites that parasite th
Is the epithelium vascularized? How do nutrients and oxygen reach the epithelium? Why is this feature a significant evolutionary acquisition? Epithelia are not vascularized (ca
Pollenkitt - Pollen Wall The lipoidal layer found on the outside of the mature pollen grains of many insect pollinated species is known as the pollenkitt. In addition to lipid
Explain Fibre and Cardiovascular Disease (CVD)? The role-of dietary fibre in modulation of blood lipids was demonstrated by Keys and his co-workers in a series of experiments c
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