189 research outputs found
Enhancement of norepinephrine-induced transient contraction in aortic smooth muscle of diabetic mice.
Changes in norepinephrine-induced transient contractions in Ca2+-deficient solution were investigated in the aortic smooth muscles of diabetic ALS (alloxan-induced diabetes susceptible) mice. The transient contractions in diabetic mice were significantly larger than those in normal mice. The longer incubation of the muscle preparations in Ca2+-deficient solution made the transient contractions smaller, probably due to the leakage and decrease in norepinephrine-releasable stored Ca2+. The rate of this reduction in contraction was slower in diabetic mice. These results suggest that the leakage of intracellular stored Ca2+ caused by extracellular Ca2+ deficiency is attenuated in diabetic mice, contributing to enhanced norepinephrine-induced transient contractions.</p
Mechanical Properties of Mo and TZM Alloy Neutron-Irradiated at High Temperatures
This work reports the mechanical properties of irradiated molybdenum (Mo) and its alloy, TZM. Recrystallized and stress-relieved specimens were irradiated at five temperatures between 373 and 800℃ in FFTF/MOTA to fluence levels of 6.8 to 34 dpa. Irradiation embrittlement and hardening were evaluated by three-point bend test and Vickers hardness test, respectively. Stress-relieved materials showed the enough ductility even after high fluence irradiation. The role of layered structure of stress-relieved specimen was discussed
Effect of Helium Implantation on Tensile Properties of V-Ti-Cr-Si Type Alloy
Helium implantation of 50at.ppmHe by cyclotron accelerator was adopted to study helium effect on tensile properties of the V-5Ti-5Cr-1Si-Al-Y type alloy. Tensile tests were conducted at temperatures ranging from room temperature to 850℃ with strain rates from 6.7×10^ to 6.7×10^/s. Increase of yield stress was not appreciable in helium-implanted specimens except for 450℃. Intergranular fracture mode was observed specimens tested at temperatures above 450℃. Decrease of elongation was observed at all testing temperatures. Relationship between tensile strength and decrease of elongation was discussed
Characteristic comparison of triglyceride-rich remnant lipoprotein measurement between a new homogenous assay (RemL-C) and a conventional immunoseparation method (RLP-C)
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