The majority of available PET isotopes are not appropriate for routine PET imaging because of unsuitable half-lives, poor availability, high production costs, and poorly developed radiochemistry [ 18].
In spite of these characteristics, its use in preclinical studies is still limited, mainly because of its limited availability and high production cost.
However, their high production cost, low operational stabilities, availability in small amounts, susceptibility to attack by proteases and activity inhibition limit their commercial applications in industrial and environmental biotechnology [9].
Start-up cellulosic biofuel industries are afflicted with problems ranging from feedstock availability to high production costs to scalability.
However, competition between the increasing needs for food and fuel, discontinuous feedstock availability, and high production costs pose serious socioeconomic and logistical problems that hamper the large-scale adoption of this energy source.
Nevertheless, the short time window for data collection (24 40 h), as a consequence of the physical half-life (14.7 h) of Y, the low positron abundance, the high production cost and the low availability, are a challenge to the routine utilization of this method.
Being the most important requirement for livestock production, availability of high-quality feeds directly reflects success in livestock production (MacOpiyo et al. 2013).
However, the high production cost of biopolymers and the availability of low-cost petrochemical equivalents make polyhydroxyalkanoates economically unattractive.
However, high production cost of the biopolymers and concurrent availability of low-cost petrochemical-derived plastics make PHA manufacture economically unattractive.
If unemployment is high, production goes down.
Schwarz blames high production costs.
