TEMPERATURE-AND TIME-RESOLVED SPECTROSCOPY OF CuUnS SEMICONDUCTOR NANOCRYSTALS WITH ZnS

نویسندگان

  • Brian L. Nerrie
  • Sangram Raut
  • Ignacy Gryczynski
  • Zygmunt Gryczynski
چکیده

THE SCIENCE OF VIRGINIA’S AQUACULTURE FEED PRICES. Brian L. Nerrie, Virginia Cooperative Extension, Virginia State University, Petersburg, VA 23806. Aquaculture feed costs are between 50-60% of the operating expenses. Aquaculture’s growth has resulted from improved knowledge of the nutritional requirements of aquacultured products. Initially nutrients were supplied by natural pond foods, and later by enhanced fertilization to improve pond productivity. Aquaculture feeds were developed that enabled farmers to provide uniform-size products to satisfy consumer demand for high quality affordable protein. Small changes in feed prices result in larger influences on product cost. Feed grains are a major component of aquaculture feeds. Increases in feed prices have resulted from alternative uses of acreage used for feed grain production especially biofuel development, decreased supply due to international demand for feed grains and local transportation costs. Economies of size in Virginia’s aquaculture industry add to prices.

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تاریخ انتشار 2017