The Influence of a Magnetized Plasma Column on the Radiation Characteristics of a Strip Loop Antenna

The radiation characteristics of a circular loop antenna located on the surface of an open waveguide in the form of an axially magnetized plasma column are studied using the rigorously obtained current distribution of such an antenna. The radiation resistance of the antenna excited by a time-harmonic external voltage is obtained for the case where the plasma inside the column is resonant. The distribution of the radiated power over the spatial spectrum of the excited waves is found and discussed

The alimentary impact of the hemp seed

Hemp seed and hemp seed oil can supply us with many important substances. Their essential fatty acid compositions are favourable, but they may contain non-psychotropic cannabinoids. Emerging data show that these components can influence the health status of the population beneficially. Some data also showed trace amounts of tetrahydrocannabinol in seed oils, the main psychotropic cannabinoid that is contraindicated.Our aim was to examine cannabinoids and fatty acid composition as well as metal and non-metal element compositions in products, like hemp seed oil and chopped hemp seed capsule.The cannabinoids were separated by thin layer chromatography. Fatty acid composition was determined with gas chromatography, and elements (Al, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S, Si, Sn, Sr, V, and Zn) were measured by inductively coupled plasma optical emission spectrometric method. Selenium was determined with polarographic analyser.Cannabinoids were not detectable by thin layer chromatography, so hemp seed oil, as well as the capsule, have no psychotropic adverse effect. Our data showed that hemp seed contains essential fatty acids close to the recommended ratio. The B and Se concentrations of the oils and the P concentration of the capsule are also relevant

Two faces of zinc in the brain

Zinc plays an essential role in the brain by participating in the bulk of enzymatic and regulatory events. However, zinc may become deleterious for brain cells in excessive amounts that may be released following stress, seizures or ischemic conditions. The mechanism of zinc-mediated neurotoxicity has appeared to be rather complex not only because of concentration effects on the level of receptors to the various neuromediators but also owing to the variety of zinc functions throughout the brain and its involvement in maintaining the cytokine network, nitric oxide production and cell signalling pathways. This review highlights a hypothetical mechanism that postulates the presence of 2 main sites of zinc turnover in the brain with slightly different functional roles

Ferromagnetic semiconductor InMnAs layers grown by pulsed laser deposition on GaAs

status: publishe

Selenium, Zinc, and Copper Plasma Levels in Patients with Schizophrenia: Relationship with Metabolic Risk Factors

The aim of this study was to determine the plasma selenium (Se), copper (Cu), and zinc (Zn) levels and to evaluate their possible association with metabolic syndrome (MetS) components in patients with schizophrenia. The study group consisted of 60 patients with schizophrenia and 60 sex- and age-matched healthy controls. Anthropometric measurements, blood pressure, and biochemical analysis of fasting blood were performed in all subjects. Patients with schizophrenia had significantly higher plasma Cu concentrations compared with controls (0.97 +/- 0.31 vs. 0.77 +/- 0.32 mg/L, p = 0.001). The plasma Cu concentration showed a positive correlation with plasma glucose and diastolic blood pressure in the patient groups (r (s) = 0.263, p lt 0.05 and r (s) = 0.272, p lt 0.05, respectively). The plasma Se level correlated positive with MetS score (r (s) = 0.385, p lt 0.01), waist circumference (r (s) = 0.344, p lt 0.05), plasma glucose (r (s) = 0.319, p lt 0.05), and triglyceride concentrations (r (s) = 0.462, p lt 0.001) in patients with schizophrenia. Plasma Zn did not correlate with any of the MetS components. These results suggest that alterations in plasma Cu and Se levels in medicated patients with schizophrenia could be associated with metabolic risk factors