The simultaneous etherification of isobutene and isoamylenes with ethanol has been studied using macroreticular acid ion-exchange resins as catalyst. Most of the experiments were carried out over Amberlyst-35. In addition, Amberlyst-15 and Purolite CT-275 were also tested. Chemical equilibrium of four chemical reactions was studied: ethyl tert-butyl ether formation, tert-amyl ethyl ether format...

Abstract--Methyl amyl ketone was given to rats, by oral intubation in oil solution, at dose levels of 0 (control), 20, 100 or 500 mg/kg/day for 13 wk. There were no statistically significant differences between treated and control rats in the rate of body-weight gain, food or water consumption, haematological findings, or the results of renal concentration tests. The histological appearance of ...

In this paper, tert-amyl alcohol was employed to directly react with metal chlorides for the preparation of oxide nanoparticles. Some typical metal oxide or hydroxides with different morphologies, such as TiO(2) nanoparticles, TiO(2) nanorods, FeOOH nanowires, Fe(2)O(3) nanoparticles, and SnO(2) nanoparticles, can be easily fabricated through such simple chemical reactions. E1 reaction was foun...

To determine the effect of myocardial shortening velocity on the duration of electrical and mechanical systole, five healthy men, ages 32 to 41, were studied. Carotid message and atropine were used to define the effects of changes in heart rate without changes in shortening rate. The effects of amyl nitrite, which produced approximately the same degree of tachycardia as atropine but a significa...

The transformation of methyl tert-butyl ether ~MTBE! and tert-amyl methyl ether ~TAME! using bifunctional aluminum in the presence of dioxygen ~O2! has been examined. Bifunctional aluminum, prepared by sulfating zero-valent aluminum with sulfuric acid, is an innovative extension of zero-valent metal technology. It has a dual functionality of simultaneously decomposing both reductively and oxida...

To study the genesis of the systolic murmur of idiopathic hypertrophic subaortic stenosis (IHSS), phonocardiograms, echocardiograms, and pulsed Doppler echocardiography were done in 11 patients with IHSS. Seven had marked systolic anterior motion of the mitral valve (SAM) at rest (group 1); four had small SAM at rest but marked SAM was noted after amyl nitrite inhalation, (group 2). In all grou...

Carbon nanotubes (CNTs) wrapped by polysaccharide chains via noncovalent interactions have been shown to be soluble and dispersed in aqueous environments, and have several potential chemical and biomedical applications. The wrapping mechanism, in particular the role played by the end of the CNT, remains, however, unknown. In this work, a hybrid complex formed by an amylose (AMYL) chain and a si...