Highly pathogenic avian influenza viruses (HPAIVs) cause lethal infection in chickens. Severe cases of HPAIV infections have been also reported in mammals, including humans. In both mammals and birds, the relationship between host cytokine response to the infection with HPAIVs and lethal outcome has not been well understood. In the present study, the highly pathogenic avian influenza viruses A/...

High-resolution spectroscopic observations were obtained for two eclipsing active close binary systems, GK Hy-drae and TY Pyxidis. For GK Hya excess emission was observed in the Balmer lines and Mg i b lines while TY Pyx showed excess emission in the Balmer lines and Ca ii H & K lines. The emission from GK Hya arises from a global phenomenon associated solely with the secondary component. The l...

Copaifera officinalis, the diesel tree, is known for massive production of oleoresin, mainly composed of sesquiterpene hydrocarbons. In this study, composition of these sesquiterpenes and their concentrations in leaves, stems and roots of C. officinalis at two developmental stages, including the three-week old (TW) seedlings and two-year old (TY) trees, were determined. The leaves of TW seedlin...

Bi r th weight is in large extent influenced by gestational age. In addi tion genetic and envi ronmental factors determine intrauter ine growth and bi r th weight. The contr ibutions of these factors may be influenced by maternal smoking dur ing pregnancy. We examined bi r th weight and maternal smoking in a sample of 2930 twin pai rs from the Nether lands Twin Register using structural equatio...

Patients with cancer often show impaired immune functions; however, the basis of this suppression is still not understood. In several experimental systems, human T-cells with receptors for Fc of immunoglobulin G may function as suppressors, and those with receptors for Fc of immunoglobulin M may function as helpers. Peripheral blood as well as tumor tissue infiltrates were examined for proporti...

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The entha lpy AH of general d isplacement react ions A B + C D A D + C B is der ived w i t h the a id of the ion ic app rox ima t i on to chemica l bond ing . T h i s entha lpy compares favourab ly w e l l w i t h Pau l ing 's cor responding equat ion AH—— 46 (%B— ̂ d ) (%A — XC)These expressions are used as a basis to discuss var ious aspects of chemical r eac t i v i t y : reversals i n react ...

Previous spin-label and electromyographic experiments with rats fed 20,25-diazacholesterol, an inhibitor of the biosynthet ic conversion of desmostero[ to cholesterol, demonstrated an increased e ry th rocy te membrane f luidi ty and myotonia, a prolonged muscle contraction upon stimulation. The current studies with rats showed normal erythrocyte f luidi ty in animals fed 20,25-diazacholesterol...

One of the most important developments in clinical immunology in the past decade has been the demonstrat ion of increased frequencies of specific histocompatibil i ty antigens in individuals with a variety of diseases, implying that genes predisposing to the disorders reside in or near the major histocompatibil i ty complex. The increased prevalence of the antigens HLA-B8, HLA-Dw3, and H L A D ...

Previous studies on the carbohydrate metabolism of neoplastic liver have established definite qualitative and quant i ta t ive alterations in the glucose-6-phosphate (G-6-P) utilization of this tumor. The G-6-P metabolism was examined in homogenates and supernatantfluid of Novikoff hepatoma and control tissues by studying the behavior of enzymes directly involved in the utilization of this hexo...