Biogas upgrading to methane and removal of volatile organic compounds in a system of zero-valent iron and anaerobic granular sludge.

The current study presented a novel process of biogas upgrading to biomethane (higher than 97%) based on anaerobic sludge and zero-valent iron (ZVI) system. When ZVI was added into an aquatic system with anaerobic granular sludge (AnGrSl) under anaerobic abiotic conditions, H was generated. Then, the H and CO were converted by the hydrogenotrophic methanogens to CH.

Is there a place for music in nuclear medicine?

Music, since the time of ancient Greek Asclepieia is well-known for its influence on men's behavior. Nuclear Medicine can study the effect of music in humans' brain. Positron emission tomography (PET) studies have shown brain areas to be activated after colored hearing vs after hearing to words.

Radionuclide imaging with human polyclonal immunoglobulin (Tc-HIG) and bone scan in patients with rheumatoid arthritis and serum-negative polyarthritis.

Background And Aim: Rheumatoid arthritis (RA) is a chronic polyarthritic syndrome in which actively inflamed joints coexist with others being in remission. Compatible bone scan (BS) reveals joints with increased activity due to degenerative alterations, whilst scanning with human polyclonal immunoglobulin (HIG) is capable to show which of the joints present active inflammation of the synovial membrane. The aim of the study is to investigate the utility of molecular imaging with HIG in patients suffering from RA.

Dissociation between circulating concentrations of immunoreactive growth hormone releasing factor and growth hormone in normal human subjects.

Using a highly specific radioimmunoassay we have measured immunoreactive human growth hormone releasing factor (ir-hGRF) concentrations in the peripheral circulation of a total of 12 normal subjects. Neither insulin-induced hypoglycaemia, intravenous arginine nor oral carbohydrate caused any change in venous plasma ir-hGRF concentrations, despite the expected stimulation and suppression respectively of growth hormone secretion. Growth hormone secretion was not increased by oral fat or protein but each of these two foods stimulated ir-hGRF concentrations two- to four-fold.

Somatostatin octapeptide (SMS 201-995) in the medical treatment of acromegaly.

Parenteral somatostatin has been used to suppress growth hormone secretion in acromegalic patients, but long-term treatment is hampered by its short half-life of a few minutes in the circulation. An octapeptide analogue of somatostatin (SMS 201-995) has recently been developed that has greater potency and selectivity in suppressing growth hormone than the native hormone. In this study somatostatin and somatostatin octapeptide infusions were compared in 13 patients with active acromegaly.