Thermal Efficiency in Laser-Assisted Joining of Polymer-Metal Composites.

Heat conduction joining is mainly used in laser-based joining of metals with polymers but results in a large amount of dissipated heat. The consideration of thermal efficiency allows the determination of power actually used for creating the joint, which is highly relevant for technical and economic reasons, e.g.

Effects of hypoxia on renin secretion and renal renin gene expression.

Plasma renin activity (PRA) and renal renin mRNA levels were measured in male rats exposed to hypoxia (8% O2) or to carbon monoxide (CO; 0.1%) for six hours. PRA increased fourfold and 3.

Acute hypoxia upregulates NOS gene expression in rats.

This study aimed to investigate the influence of acute tissue hypoxygenation on the expression of NO synthase (NOS) genes in vivo. To this end, male Sprague-Dawley rats were exposed either to 9% oxygen or to 0.1% carbon monoxide for 6 h, and mRNA levels of NOS-I, -II, and -III in kidneys, livers, lungs, and left and right heart ventricles were assayed by ribonuclease protection.

Acute hypoxia stimulates renin secretion and renin gene expression in vivo but not in vitro.

This study aimed at examining the influence of acute hypoxia on renin secretion and renin gene expression in the kidney. To this end, male Sprague-Dawley rats were exposed to severe hypoxic stress (8% O2) or to carbon monoxide (0.1% CO) for 6 h, and plasma renin activity (PRA) and renal renin mRNA levels were determined.

Zonal expression of angiotensin II-AT1-receptor genes in rat kidneys.

This study aimed to examine the relative distribution of ANGII-AT1-receptor gene expression in different zones of the rat kidney, namely the glomeruli, cortex (CO), outer and inner stripes of outer medulla (OSOM and ISOM, respectively) and inner medulla (IM). By RNAse protection we found a ratio for the overall abundance of AT1 mRNA of 1, 0.68, 0.