This report describes the effect of liver transplantation on transcerebral ammonia uptake in a case of fulminant hepatic failure. A young woman with fulminant hepatic failure and coma received monitoring of transcerebral ammonia uptake before and after orthotopic liver transplantation. Before liver transplantation, median transcerebral ammonia uptake was 8 µmol/L. After liver transplantation, a...

According to the usually accepted concept, the urea removed from the blood by the kidneys is excreted in two forms, chiefly as urea itself, but partly as ammonia. That the ammonia of the urine is formed in the kidneys was demonstrated by Nash and Benedict (1921), in work which has been confirmed by other authors (cf. Peters and Van Slyke, I, p. 373). Evidence from animal experiments in v4vo has...

THE FIELD OF TRANSPORT PHYSIOLOGY was fundamentally changed by the discovery of transport proteins that are specific for small neutral molecules such as urea, water, ammonia, and CO2. The identification of first urea transporters (12), then aquaporins or water channels (1), and most recently ammonia transporters (8) (that may also facilitate the movement of CO2), challenged the long-held view t...

Burullus Lake is Egypt’s second most important coastal lagoon. The present study aimed to shed light on the different types of polluted waters entering lake from various drains, as well evaluate zooplankton community, determine physical and chemical characteristics waters, eutrophication state based three years seasonal monitoring 2017 2019 at 12 stations. results revealed that Rotifera, Copepo...

Abstract All over the world desecration is a major factor for livelihood and plantation. There are various types of desecrations air ( or desecration), water desecration, Industrial noise urban etc. In India Act 1981 prescribes functions Central Desecration Control Board (CPCB) at open level state control board about desecration. 1974 gives prevention 1986 section 2(a) explains under rules, 200...

hyper - immunoglobulin e syndrome is a rare primary immunodeficiency disease characterized by recurrent abscess formation, respiratory tract infections and very high titers of serum ige associated with peculiar face and skeletal features. we report a seven-year old  girl  presenting with persistent productive cough and  history of chronic eczematoid facial lesions since infancy  and  two episod...

There is a growing interest towards self configuring/tuning automated general-purpose reusable heuristic approaches for combinatorial optimisation, such as, hyper-heuristics. Hyper-heuristics are search methodologies which explore the space of heuristics rather than the solutions to solve a broad range of hard computational problems without requiring any expert intervention. There are two commo...

The cyclotron-produced radionuclide, 13N, was used to label ammonia and to study its metabolism in a group of 5 normal subjects and 17 patients with liver disease, including 5 with portacaval shunts and 11 with encephalopathy. Arterial ammonia levels were 52-264 micron. The rate of ammonia clearance from the vascular compartment (metabolism) was a linear function of its arterial concentration: ...

In this study performance characteristics of ammonia engines using direct injection strategies are investigated. Ammonia is a carbon-free fuel, and thus its combustion does not produce carbon dioxide, a critical greenhouse gas. Ammonia can be produced by using renewable energy sources (e.g., wind and solar) and used as an energy carrier. Recent research also has shown that the efficiency of sol...

Nitrogen (N) appears to be a limiting dietary resource for elasmobranchs, required not only for protein growth but also for urea-based osmoregulation. Building on recent evidence that the toxicant ammonia can be taken up actively at the gills of the shark and made into the valuable osmolyte urea, we demonstrate that the uptake exhibits classic Michaelis-Menten saturation kinetics with an affini...