Dictionary » G » Gradient

Gradient

Definition

noun, plural: gradients

(1) A slope, which may be upward or downward.

(2) The degree of steepness or inclination, e.g., of a road or other geographic features.

(2) The rate of change of one variable relative to another, e.g. a physical quantity (e.g. temperature or pressure) increases or decreases relative to change in a given variable (e.g. distance).

(3) The rate of change in growth, metabolism, or physiological activity of a cell or organism.


Supplement

Word origin: From Latin gradiens, present participle of gradior (“‘to step, to walk’”).

Related phrases: concentration gradient, proton gradient, potential gradient.


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Compare and Contrast Active and Passive Transport?

active transport does not have to go against conc. gradient, theoretically.

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by JackBean
Sat Nov 10, 2012 11:24 am
 
Forum: Cell Biology
Topic: Compare and Contrast Active and Passive Transport?
Replies: 6
Views: 2828

Compare and Contrast Active and Passive Transport?

active transport involves usage of ATP molecules \passive transport does not. active transport takes place against conc.gradient\it takes place along the gradient. mol. enter through spcl.pore on the cell membrane \mol. enter along with the water flow via endosmosis.

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by super17
Sat Nov 10, 2012 7:49 am
 
Forum: Cell Biology
Topic: Compare and Contrast Active and Passive Transport?
Replies: 6
Views: 2828

Biochemistry

Quick Question Here... Which type of transport relied on the driving energy of a gradient? a. Active b. Facilitated c. Passive d. Pumped e. ATP mediated

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by snjaved1
Thu Nov 08, 2012 9:16 pm
 
Forum: Molecular Biology
Topic: Biochemistry
Replies: 1
Views: 446

Primers Tm

Today I used gradient PCR and I set the annealing temp to start from 55 and increase 15 degrees gradually. the range was as follows: 55.1 55.5 56.4 57.6 59.2 61.1 63.8 65.7 67.4 68.8 69.9 70.3 I also tried 1:1 ratio and 2:1 (Low ...

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by bravebeaker
Mon Oct 15, 2012 10:46 am
 
Forum: Molecular Biology
Topic: Primers Tm
Replies: 7
Views: 863

Primers Tm

... a range as you recommended from 59 to 68? is it by using the Rotor Q? because I couldnt find the right option in the software. or by using a gradient block PCR? or by simply trying all degrees in seperate runs? I tried changing the concentrations of the primers as you suggested along with ...

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by bravebeaker
Fri Oct 12, 2012 9:47 am
 
Forum: Molecular Biology
Topic: Primers Tm
Replies: 7
Views: 863
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