When we began a study of the nutritional requirements of highly inbred strains of mice, the immediate problem facing us was the selection of a suitable stock ration. Many such feeds are commercially available, but advertising claims would lead one to regard most of them as equally superb. To gain some information on this matter we studied the growth rates of two strains of mice on various stock...

Attempts to develop defined in vitro culture systems for the growth, reproduction and development of free-living nematodes have yielded much basic information about their nutritional requirements and biochemistry. Requirements for sterol and heme have been identified suggesting that some nematodes lack de novo synthesis of these molecules. Possible pathways of metabolism of these nutritional re...

Abstra.ct.-Eight hardwood species were planted at five spacings in a minor stream bottom in southeast Arkansas. Hecause of inherent differences in nutrient requirements and tree development, only four oak species are covered in this paper. Spacing gp.nerally did not affect nutrient concentrations , but differences did exist among species. Leaves constituted only 10-15 percent of aboveground bio...

Prototrophic recombinant strains were obtained by plating on minimal medium spores from mixed cultures grown on limiting agar, of two strains each with a different double nutritional requirement. Clones showing new associations of properties were isolated on partially supplemented media. Some showed one ‘ mutant ’ character derived from one of the starting strains and ‘wild’ characters derived ...

Aquacultural production is a major industry in many countries, and it will continue to grow as the demand for "sheries products increases and the supply from natural sources decreases. As in more traditional forms of animal production, nutrition plays a critical role in intensive aquaculture because it in#uences not only production costs but also "sh growth, health and waste production (Gatlin,...

Most nutrient models predict supply of metabolizable energy (ME) and metabolizable protein (MP); in lactation models, flow of nutrients are predicted from endogenous, microbial, and undegraded dietary sources. Nutrient requirements are usually predicted using factorial calculation of requirements for maintenance (adjusted for environmental and management considerations), growth, pregnancy, and ...

In Cuba, the responsibility for food and nutrition security is shouldered first and foremost by government. That is, government is obligated to develop and implement policies towards ensuring that the entire population has consistent access to safe and nutritious foods in sufficient quantities to satisfy daily nutritional requirements and food preferences, contributing to an active and healthy ...

b a ckground: malnutrition has been the most prevalent problem in hospitalized patients during recent years, which accentuate the paramount importance of comprehensive nutritional  support  among  these  patients.  this  study  aimed  to provide a review of the recent literature about intensive care unit (icu) inpatients and their nutritional care. m ethods : this review on energy and nutrient ...