[en] The treatments involve high temperature (1100⁰C) austenitizing during the first solution treatment followed by either interrupted quenching (Ms-Mf range) or isothermal transformation to produce lower bainite. Finally, the steels are given a 900⁰C grain refinement treatment. Lower bainite was obtained by isothermally transforming austenite just above the Ms temperature. Tempering after the martensitic and bainitic treatments was also done in an attempt to improve the toughness of the material. The strength and toughness properties of as-quenched martensitic structures are somewhat superior while these properties of lower bainitic structures are comparable to those of a plain 0.4C steel. The properties of the nearly 100 percent bainite structure were unaffected by the cooling rate from the transformation temperature. Elimination of intergranular cracking produced toughness properties in quenched and tempered martensites which are far superior to those of lower bainite at the same strength level. It has also been shown that the toughness properties of as-quenched double-treated steels are superior to single treated steels. The chromium appeared to have a strong influence on the nature and morphology of carbides, as the bainitic as well as the martensitic structures showed marked temper resistance in the tempering range 200 to 500⁰C

[en] During investigations of the influence of various elements on the determination of cobalt(II), which is based on its oxidation in a 1,10-phenanthroline or 2,2'-bipyridine medium at pH 2 - 6.5 to the corresponding cobalt(III) complex with gold(III) chloride, it was found that the reaction is affected by molybdenum(VI) which is reduced and precipitated as a blue molybdenum complex by cobalt(II). This reduction proceeds slowly at pH 3 - 2 and rapidly at pH 1. A simple specific detection test has been developed for the presence of molybdenum on the basis of this reduction. In solutions with 1,10-phenanthroline or 2,2'-bipyridine, cobalt(II) reduces dilute molybdenum(VI) (10^-3 M) to a blue molybdenum complex at pH 1 and room temperature. A positive response is obtained with 5 μg of molybdenum, indicating the attainable limit of identification. (Auth.)

[en] Short communication. 5 refs., 1 fig

[en] Using Persantine (dipyridamole) Tl-201 stress (PTST), we studied 102 symptomatic patients unable to undergo routine Tl-201 stress tests because of severe peripheral vascular disease, debilitating arthritis, or the presence of a limb prosthesis. Persantine, 0.14 mg/kg, was injected intravenously under electrocardiographic and blood pressure monitoring, followed by 5 minutes of limited exercise. Three-view immediate and delayed thallium images were qualitatively interpreted as normal, indicating ischemia, or indicating infarction. Serious side effects requiring intervention occurred in 4% of patients. Comparison with results of coronary angiography (eta = 24) yielded a sensitivity of 95%, a specificity of 40%, and an accuracy of 83% for PTST in the detection of coronary artery disease

[en] Preliminary work has been done to study certain responses induced by irradiated amphistome metacercariae used as a vaccine to immunise lambs, kids and calves. The electrophoretic pattern of the sera collected from lambs and kids vaccinated with gamma irradiated amphistome matacercariae (C.I. XXVI) has been reported in this study. (author). 10 refs., 1 table

No abstract available

[en] Two series of copper ferrites are prepared using the chemical compositional formula Cu _1.0−3y Fe _2.0−2x Mo _x+y O_4.0. The resistivity is found to decrease for lower values of Mo while it increases for higher values of Mo. Variation of resistivity as a function of temperature exhibited four regions with three values of transition temperature indicating contribution of different conduction mechanism to each of the region. Significantly in the region –I conduction is reflected its non-dependence of temperature. Further evaluated activation energy values of C series and tetragonal structured materials are higher than other ferrites. These results are explained with different possible mechanisms. - Highlights: • Strong bonds between different metallic ions present in the ferrites are formed. • log ρ Vs 10³/T plots are shown 4 regions with 3 values of transition temperature. • Region –I of log ρ versus 10³/T plots is reflected showing its conduction independence of temperature. • At x=0.02 and y=0.06 computed activation energies are found to be significant.

No abstract available

[en] Short note. 14 refs

[en] The viability of gamma-irradiated (2 krad) amphistome metacercariae (C.indicae XXV1) was determined in lambs and kids. After storing the irradiated metacercariae at 4⁰C for 21 days, a mean of 1024 and 965 flukes were recovered in lambs and kids respectively 50 days after infection compared to 1724 and 1689 flukes respectively in control animals. Increasing the storage time of the irradiated metacercariae to 35 days resulted in no flukes being recovered 50 days after infection compared to 1567 and 1482 flukes in the control lambs and kids respectively. (U.K.)