Effect of heat treatment of ti substrate on service life of ti-supported IrO2 electrode in mixed aqueous solutions of H2SO4, (NH4)2SO4 and NH4F

The effect of the heat treatment of Ti substrate on the service life of Ti-supported IrO₂ electrode was investigated in mixed aqueous solutions of H₂SO₄, (NH₄)₂SO₄ and NH₄F. The service life was prolonged by the heat treatment of Ti substrate prior to the coating of IrO₂. Such effect was attributed to the increase in thickness of TiO₂ layer existing at the Ti/IrO₂ interface.     

A study on thallium-201 SPECT in brain metastases of lung cancer: with special reference to tumor size and tumor to normal brain thallium uptake ratio

The activity of prolyl endopeptidase (PEP), a serine proteinase, has been found to be significantly lower in the blood of patients with major depression than in normal volunteers. The present study investigates plasma PEP activity in 25 major depressed, 10 manic, and 14 schizophrenic subjects versus 30 normal volunteers. It also examines the effects of antidepressants, valproate, and neuroleptic drugs on plasma PEP activity. PEP activity was significantly lower in major depressed subjects than in normal volunteers and in patients with mania and schizophrenia. In depressed subjects, plasma PEP activity was significantly increased during treatment with antidepressant drugs, such as fluoxetine. Plasma PEP activity was significantly increased in manic and schizophrenic subjects compared with normal volunteers. In manic subjects, short-term treatment with valproate had a significant suppressive effect on PEP activity. No significant effects of neuroleptics on PEP activity could be found in the schizophrenic patients. The results support the hypothesis that lower PEP activity could play a role in the pathophysiology of major depression, while increased PEP activity may be related to psychotic conditions, such as mania and schizophrenia.     

Classification of three-phase reactors

Cocurrent upward three-phase reactors with discontinuous gas phase can be classified into three types according to axial profile of solid concentration. These are: gas-sparged slurry reactors, three-phase bubble columns and three-phase fluidized beds. A map to characterize these three types of reactors was obtained as a function of both particle size and difference between densities of solid and liquid. This paper is dedicated to Dr L K Doraiswamy on his sixtieth birthday     

消失的百万辆日本报废汽车

受益于前所未有的废料价格上涨冲击,主要拆解厂正在加速对新厂和新设备的投资.