synchronization of rumen available protein and energy is one of the conceptual methods to increase the efficiency of utilization of nutrients by the ruminants the concept of synchronization energy and protein was first by jhonson, implying that maximum microbial protein synthesis could be achieved by matching the rate of organic matter and protein degradation. synchronization of rumen available...

The size of nearly all cells is modulated by nutrients. Thus, cells growing in poor nutrients can be nearly half the size of cells in rich nutrients. In budding yeast, cell size is thought to be controlled almost entirely by a mechanism that delays cell cycle entry until sufficient growth has occurred in G1 phase. Here, we show that most growth of a new daughter cell occurs in mitosis. When the...

Tidal exchanges of nitrogen, phosphorus, and organic carbon by a high and a low elevation marsh in the Rhode River estuary were measured throughout the year. Both marshes tended to import particulate matter and export dissolved matter, although they differed in the fluxes of certain nutrients. Compared with tidal exchanges, bulk precipitation was a major source of ammonia and nitrate and a mino...

Unidirectional influx and efflux of nutrients and toxicants, and their resultant net fluxes, are central to the nutrition and toxicology of plants. Radioisotope tracing is a major technique used to measure such fluxes, both within plants, and between plants and their environments. Flux data obtained with radiotracer protocols can help elucidate the capacity, mechanism, regulation, and energetic...

Obesity has become, nowadays, a global concern affecting both developed and developing countries. Nutrition and physical activity represent the major factors influencing energy balance and subsequently weight status. Deciding toward an appropriate intake of all nutrients is seen as necessary to maintain a wholesome lifestyle: among nutrients, sugar plays a major role and its consumption has lon...

Much attention has been paid to dairy cattle nutrient requirements for maintenance and production for the major nutrient classes: protein, carbohydrates, fats, vitamins and minerals. Requirements are usually established in feeding trials using graded levels of nutrients and defining optimal performance or blood concentrations. These incorporate a factorial approach utilizing the knowledge of nu...

The exchange of nutrients between placenta and fetus involves three major mechanisms: (1) direct placental transfer of nutrients from the maternal to the fetal plasma, (2) placental metabolism and consumption of nutrients, (3) placental metabolism of nutrient substrates to alternate substrate forms. Additionally, placental size, architecture, developmental and pathological processes, and intera...