The potential of African agriculture is undoubtedly bright, but food security depends on the four As - the essential combination of availability (is there enough), accessibility (in the right place), affordability (for the whole population) and adequacy (for a nutritious, balanced diet).
The chemical industry of 100 years ago was reliant on plant material as feedstock but the combination of availability of cheap fossil oil, the advancement of organic chemistry and increasing prices for plant material, led to a shift to a near total dependency on fossil oil as feedstock.
These regions are home to terrestrial cave-obligate faunas that are species-rich and highly-endemic, reflecting a combination of habitat availability (i.e., many caves), habitat persistence combined with periodic isolation, and availability of source faunas for cave colonization and subsequent evolution.
At present, tool compounds with the appropriate combination of oral availability, brain penetration, and selectivity against other kinases are not yet available for testing in in vivo models of demyelination remyelination.
To many of those millions, Clooney's doe-eyed Doug Ross was a mesmerizing combination of sexual availability and professional maturity, of guy and man.
But I suspect it is a combination of the availability of unchecked information on the internet, sexy headlines, and the need for a dietary scapegoat.
In three years, the solar epidemic will reach New York, due to a combination of solar availability and sky-high electricity prices.
During pre-production, Patrick McGoohan was contacted as a possible guest-star, but a combination of actor availability and budget limitations precluded his casting as the voice of the President.
A combination of the availability of food in winter and summer probably influences the survival of the birds, since individuals starting the winter in poor condition are less likely to survive than those in good condition.
It is unclear which factors are responsible for this high variation in nematode standing stock, but likely a combination of food availability, associated with seep intensity, but also the presence of soft substrates, are the main drivers.
These low rates probably reflect a combination of limited availability of local services, especially for patients seen as medically ill and stigma (Wessely, 1996).
