The phrase "availability has been demonstrated" is correct and usable in written English.
You can use it when discussing evidence or proof that something is available or accessible, often in a formal or technical context.
Example: "The results of the study indicate that the availability has been demonstrated through multiple trials and tests."
Alternatives: "availability has been proven" or "availability has been established."
As glucose availability has been demonstrated to be relevant for cellular survival under hypoxic conditions [ 35- 37], we investigated whether hypoxia might alter the deficiency of glioma cells to metabolize ketone bodies.
Impaired function of isolated mitochondria in the presence of unlimited oxygen availability has been demonstrated earlier by our group [ 16] and by other workers [ 10], and can be explained with partial uncoupling of mitochondrial oxidative phosphorylation.
Thus, nutrients manipulation may influence these pathways; for example, relative deficiency in carbohydrate availability has been demonstrated to be a stimulus in vivo for activation of AMPK and SIRT-1, increasing phosphorylation of AMPK and deacetylation of PGC1 α in skeletal muscle without affecting the total amount of AMPK, PGC1 α, or SIRT 1 [ 38].
The mesenchymal stem cells (MSCs) with their pluripotency and availability have been demonstrated to be an attractive cell source.
Despite its low bio-availability, efficacy has been demonstrated in several in vivo studies [ 46- 48].
A discrepancy between oxygen availability and demand has been demonstrated in experimental CKD.
At end, the validity and availability of this technique has been demonstrated through the off-axis and in-line Fourier transform recording geometry.
Limiting availability of lethal methods has been demonstrated to reduce suicide rates at a population level [ 4].
Furthermore, it has been demonstrated that availability and uptake of arecoline depends on the degree of maturity of the nuts at the time of consumption, the method of preparation, the contents of the 'betel quid', and whether the quid is swallowed or spat out [ 5].
However, it has been demonstrated that the availability of reliable hydrological data results in benefits an order of magnitude larger than the costs of collection.
"Darren's commitment and pride in playing for his country is an example to any professional footballer, as has been demonstrated by his availability for the recent World Cup qualifiers and the international challenge match against Luxembourg.
