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When the water in a pond gets so cold that it hardens on the surface it is going through whihc change of state?

When the water in a pond gets so cold that it hardens on the surface, it is undergoing a change of state from liquid to solid, which is called freezing. This process occurs when the temperature drops to 0 degrees Celsius (32 degrees Fahrenheit) or below, causing the water molecules to slow down and arrange themselves into a solid crystalline structure, forming ice.


What is Panama disease?

Panama disease is type of plant disease whihc attacks Banana (Musa) trees.This in 1800 orginated from South East Asia. Panama disease impacts the production banana cultivations. More details can be found at:http://www.plantmanagementnetwork.org/pub/php/management/bananapanam


What are the affects of biomass on our ozone layer?

The biomass seems to maintain a level of oxygen, from which ozone is made. If biomass is burned, chlorinated / brominated compounds are released into the atmosphere, some small part of whihc make it to the ozone layer to increase depletion.


What are the molecules on the right side of a chemical equations?

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.


How does formalin fix tissues?

A formaline fixed parrafin embedded tissue is a piece of tissue which is first separated from a specimen animal by disection or biopsy. Then, this tissue is fixed in order to prevent it from decaying or degeneration and to examine it clearly under a microscope for histological, pathological or cytological studies. This fixed tissue is then embedded in the wax to cut its fine sections and then, to stain it with Hemotoxylin and Eosin Stain. After that microtoming is done by cutting fine sections to study it under microscope. Fixation is the process by whihc he tissue is immobilized, killed and preserved for the prupose of staining and viewing it under a microscope. Fixation makes tissue permeable to staining reagents and cross-links its macromolecules so that they are stabilized and locked in position. Many fixatives are used for this purpose for example, Bouine solution, Formaline, or Liquid Nitrogen (-80C for freezing purposes).