Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Fensom and Spanner Electroosmotic Flow Hypothesis
In electroosmosis the ions flow across a membrane in response to electrical gradient. Ions pull along water and other contents because of solvent drag. In this hypothesis it is visualised that sap flows in the lumen of sieve element and electroosmosis occurs across the sieve plate. The basic idea of this model is represented in Figure. The pores of sieve are negatively charged and many positive ions are associated with them. The companion cells of consecutive sieve elements are shown to be engaged in K+ uptake and release. This generates a (K+) gradient in the direction of phloem sap flux; the fluxes of other solutes are coupled to K+ flux and move along with the electroosmotic flow from one sieve tube to the next.
Figure: Active uptake of K+ by the companion cell from its associated sieve tube on the left and secretion of K+ into the sieve tube at the right side by its companion cell generate both e potential difference and a K+ concentration gradient. This causes a now of K+ ions and other solutes from right hand side to left.
Explain about the Secondary Protein Derivatives? These are the products of further hydrolytic cleavage of the protein molecule, Examples include: a) Proteoses: Soluble in wa
What is a centimorgan? The Centimorgan, or The recombination unit, by convention is a distance between two linked genes that corresponds to 1% of recombination frequency of the
Write in 5-6 lines about food pyramid. The diabetes food pyramid divides food into six groups. These groups vary with each other on the basis of si-e occupied in the pyramid.
Q. Biological monitoring to validate that the sterilizer? The use of biological monitors (spore tests) is the most reliable method to validate that the sterilizer is functionin
What is the role of Plant Cells? Plant cells function essentially in the same manner as other eukaryotic cells, but there are three unique structures which set them apart. Plas
DRINKING & DRIVING - It should not be mixed because alcohol - 1. Impairs ability to judge distances. 2. Reduces capacity to coordinate limb muscles. 3.
What are the types of colloidal dispersions Depending upon the relative affinity of the dispersed phase for the dispersion medium, colloidal dispersions are, further divided in
The condition in which there is a DECREASE in the number of white blood cells in humans is termed as: a) Leukocytosis (pron: lew-kO-sigh-toe-sis) b) Leukopenia (pron: lew-kO
filter feeding mode of nutrition is observed in- a) amoeba b) euglena c)paramoecium d) all of the above
Antibodies of dissimilar specificities, which react to the same antigen, are known as polyclonal antibodies.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd