The phrase "an active transport" is not correct in written English.
The correct form is "active transport" without the article "an."
Example: "Active transport is essential for moving substances across cell membranes against their concentration gradient."
Alternatives: "a transport mechanism" or "a transport process."
An evaluation of an active transport intervention among Scottish students reported significant increases in the mean distance walked to school by intervention students versus control students [ 21].
This transporter functions as an active transport system that carries taurine against a concentration gradient, driven by transmembrane sodium and chloride gradients and membrane potentials.
Hence, the second issue is that TFV activation in the mitochondria will necessitate export of the phosphorylated form (TFV-MP or TFV-DP) into the cytosol via an active transport in order to exert its anti-HIV activity and to avoid mitochondrial toxicity.
There are eight (8) main transportation planning objectives to be achieved in organising an active transport system, such as congestion reduction, road and parking cost reduction, consumer cost reduction, crash risk reduction, air and noise pollution reduction, energy conservation, economic development benefits and liveable communities.
Methyl mercury has an "active transport system" to carry it across the blood-brain barrier, but there is no such transport for ethyl mercury, which is further hindered from entering the brain by being a larger molecule that is rapidly decomposed once in the body.
This species exclusively relies on an active transport system for glycerol uptake.
Preclinical studies have reported an active transport system of PACAP38 across the BBB in the rat [7].
The liver is the primary target, metformin being taken up into human and rat hepatocytes via an active transport mechanism.
These data suggested that NSFs stimulate an active transport pathway, most likely transcytosis, in addition to increasing paracellular flux.
This suggests the existence of an active transport mechanism for distamycin-derived cytotoxics characterized by strong basic amidino or guanidino moieties.
Characterization of fluoroquinolone uptake suggests that these drugs penetrate the THP-1 membrane by passive diffusion, and also, in part, via an active transport system.
