Reducing dietary protein content in fish feeds will reduce cost of production if growth performance can be maintained. In this study, we assessed the effects of reduced dietary protein content from 33.5% to 27.4% with ideal amino acids profile on the growth, immune parameters, intestinal microvilli length and total ammonia nitrogen discharge of tilapia. After 8 weeks of feeding, growth performa...

High protein intakes elevate plasma urea and ammonia concentrations and this can be negatively associated with plasma progesterone concentrations in cows (Jordan and Swanson 1979; Jordan et al. 1983). Low plasma progesterone concentrations may compromise embryo survival and there are reports of negative relationships between protein intake and conception rate in dairy cattle (eg Jordan and Swan...

The gut is classically seen as the main source of circulating ammonia. However, the contribution of the intestines to systemic ammonia production may be limited by hepatic extraction of portal-derived ammonia. Recent data suggest that the kidney may be more important than the gut for systemic ammonia production. The aim of this study was to quantify the role of the kidney, intestines, and liver...

abstract in this study the effect of combination of trichoderma harzianum bi and salicylic acid were studied on root knot nematode (meloidogyne javanica) disease on tomato under green house conditions. the roots of tomato seedlings at six-leaf stage were inoculated with suspensions of fungal antagonist (106 conidia/ ml), 5mm salicylic acid and 2000 second-stage juvenile (j2). combined applicati...

The link between anthropogenic emissions of carbon dioxide, increasing atmospheric CO2 levels, and concomitantly increasing global temperatures is established and accepted. The use of aqueous ammonia, to capture CO2 and produce an inexpensive nitrogen fertilizer, ammonium bicarbonate (ABC), is believed to be a feasible approach to CO2 sequestration. Due to the varying concentrations of reactant...

The explanation of the formation of amides in green plants is one of the oldest problems of plant biochemistry. Since the discovery in 1806 of asparagine in asparagus shoots by Vauquelin and Robiquet (1) and the demonstration in 1848 by Piria (2) of the derivation of this substance in seedlings from the proteins of the seeds and of its chemical relationship to malic acid, asparagine and its lat...

The predominant ruminal bacteria that were obtained from a 10(8) dilution of ruminal fluid could be maintained as a mixed population for long periods as long as the bacteria were provided with a complex mixture of carbohydrates. Growth of predominant ruminal bacteria in carbohydrate-limited, ammonia-excess, continuous cultures (0.07/h) had a low requirement for maintenance energy, but the nongr...

The measures of most-probable-number and restriction fragment length polymorphism analysis were used to analyze the abundance and diversity of ammonia-oxidizing bacteria in sediment of a Chinese shallow eutrophic urban lake (Lake Yuehu). Among the 5 sampling sites, ammonia concentration in interstitial water was positively proportional not only to the content of organic matter, but also to ammo...

Isolated, surviving sacs of everted small intestine were used to characterize ammonia transport in the golden hamster. Jejunal and ileal sacs incubated aerobically in ammonia-free test solution liberated the same quantity of ammonia as did sacs that were filled and immediately emptied of their contents, indicating no significant evolution of metabolic ammonia. Under aerobic conditions, ileal sa...