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Q. Explain the use of Benzoates acid?
Benzoic acid, sodium benzoate and the parahydroxy esters (parabens) are used as preservatives. Benzoic acid and its sodium salt, sodium benzoate, is the widely used preservative when compared to other preservatives. Sodium benzoate is more soluble in water, as such, it is the preferred form. The antimicrobial activity of benzoate is greater at the lower pH values. Its optimum pH range is between 2.5 to 4.0. Only the undissociated benzoic acid molecules are active. Due to this, the benzoic acid and its salts are effective in high acid food products.
Q. Besides vertebrates two invertebrate phyla contain species that make pulmonary respiration. Which are these phyla? Terrestrial molluscs and the arachnid arthropods are the i
Define the Sterilization protocol? Sterilization protocol encompasses the following: 1. Transport of instruments to the sterilization area 2. Cleaning of instruments 3
Imaginal Discs In the holometabolous larva, there are two cell populations: (1) The larval cells that are used for the larval structures and (2) The imaginal disc and th
List and briefly describe the mechanisms that prevent acid-base imbalances from appearing in the body. In addition, indicate where each mechanism functions most significantly.
LIVING FOSSILS - 1. Limulus (King crab) Arthropoda 2 . Neopelina Mollusca 3 .
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Soil Water Soil water relationship is very important. In the fist place the supply of large quantities of water is necessary to satisfy the evapo-transpiration requirements of
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How can we calculate the IVI from a total number of (30) quadrats (each 30 x 30 m quadrats)
Quick transient responses - Behaviour of Plants Such responses are stimulated by factors showing significant variations over relatively small time period e.g., those showing w
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