BACKGROUND The current dietary iron requirement (80 mg/kg) of broilers is mainly based on growth, hemoglobin concentration, or hematocrit data obtained in a few early studies; however, expressions of iron-containing enzymes might be more sensitive novel criteria to evaluate dietary iron requirements. OBJECTIVE The objective of this study was to determine dietary iron requirements of broilers ...

In an earlier study Oreochromis niloticus fingerlings (initial weight, 4.31±0.27 g) were fed diets with dietary protein levels, ranging from 7.30% 44.24% dry matter (dm) for eight weeks. Using growth performance and food conversion ratio, the dietary protein requirement of the fingerlings was estimated at 33.32% dietary protein (dm). In this study the dietary essential amino acid requirements f...

amino acids (aa) are important in poultry nutrition not only for protein deposition, but also for other metabolic functions; such as improving immune and gut functions. although, some table values are available on amino acids requirement, aa requirements may vary due to changes in dietary composition and breeding selection. thus amino acids requirements have remained an ongoing research topic. ...

Cats have requirements for essential dietary nutrients additional to those needed by other animals. The object of this review is to relate the idiosyncratic nutritional requirements of cats to activities of enzymes involved in the pathways of these nutrients. The high protein requirement of cats follows from the lack of regulation of the aminotransferases of dispensable nitrogen metabolism and ...

Undernutrition - of both macronutrients and micronutrients - is still a surprisingly common problem among older people in the UK. There is a variety of nutritional supplements that community nurses need to be aware of in managing their patients' nutritional requirements. Different supplements are taken for different disease states. This article looks at the various nutrient and energy requireme...