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i got most of it frm :- http://www.sciencedaily.com/releases/2011/04/110428123931.htmCould you tell me if you typed all this yourself?
If not please send me the link from where you got it
Thanks
The process of extraction of metals using bacteria is known as Bio-leaching. Chemoautotrophic bacteria, which obtain their energy from oxidation reactions, such as A.ferrooxidans are used to extract the metals of Copper, zinc, gold, silver etc from their low grade ores. The insoluble ore is turned to soluble ore. First of all, the ore is piled up, followed by creating acidic conditions (pH 1.5-3). Different types of bacteria can be used, not just one. The reaction is highly exothermic. The reaction could be direct oxidation from Sulfide to Sulfate , Ferrous to Ferric. Products are washed in pools and the metal is displaced by adding scrap iron.
Because when there is a change in stimulus, the generator potential has to exceed the threshold level first. For this to happen, energy conversion takes place at the receptor, in this case the beta- cells, which leads to a series of processes which leads to insulin being secreted. If we take the case of the Pacinian capsule (pressure receptor), it gets squeezed out of shape which opens the Na+ channels which eventually leads to an action potential. Every receptor has it own 'skip' and if you are doing A2 CIE you do not have to study those. Just the basic concept of the energy conversion(from light, pressure, heat, chemical etc to electrical potential), threshold level and the generator potential.
Here is what I think
Wow that's a nice diagram thanks a lot.
WelcomeWow that's a nice diagram thanks a lot.
Try thinking about it this way, at night there is no sun and obviously less/no transpiration. Now you studied that the movement of water in the xylem depends upon the low hydrostatic pressure created at the leaves due to loss of water. This creates a transpirational pull and thus water moves up the xylem. Back to night-time, no sun=no transpiration, thus water moves slowly if at all in the xylem and thus the diameter increases. The same concept applies during day time and thus the diameter is much less during the day as most of the water is constantly moving due to the cohesion-tension theory and transpirational pull.
The answer will be B probably HIV/AIDS, I believe this is due to the working of the enzyme reverse transcriptase. Therefore, to prevent it, drugs that have structures similar to DNA nucleotides are used to act as competitive inhibitors etc. I guess this is a pretty fair assumption
THANK YOU BRO!!!The answer will be B probably HIV/AIDS, I believe this is due to the working of the enzyme reverse transcriptase. Therefore, to prevent it, drugs that have structures similar to DNA nucleotides are used to act as competitive inhibitors etc. I guess this is a pretty fair assumption
which book is it? awesomeHere you go!
Sorry for the bad quality though.
There you gowhich book is it? awesome
Read the book online herewhich book is it? awesome
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