[en] A low-loss microwave dielectric material comprising a sinter of a mixture of a perovskite type structure compound oxide comprising singly or mainly Ba(Zn /sub 1/3/ Ta /sub 2/3/ )O₃ and Ba(Mg /sub 1/3/ Ta /sub 2/3/ )O₃ with a small amount of Mn. Mn addition not only favorably affects sinterability to lower the required sintering temperature but also advantageously heightens the unloaded Q factor of the resulting sinter in an SHF band

[en] In a nuclear reactor having a core of fuel elements, the elements having a cladding, and the reactor having a cover gas and a cover-gas clean up system for removing fission gas activity from the cover-gas the cover-gas clean up system comprising an argon gas purging system, an on-line breached fuel element diagnostic system is described comprising: (a) a detector means responsive to fission gas isotope activity in the cover-gas; (b) means for measuring the argon purge rate of the argon gas purging system; (c) processing means responsive to the outputs of the detector and the argon purge rate measuring means and operable to calculate the corrected gas activity

[en] One typical problem concerning the supply of electricity in Japan is that the magnitude of demand for electricity differs remarkably by day and night. At present, pumped-water power systems are used to control this condition during high demands. This study offers a solution to the problem of variable demand by proposing a new electric energy storage system which uses nuclear energy from a high-temperature-gas-cooled-reactor (HTGR). A feasibility study was performed, as a first step, during which the total plant concept is developed. Its feasibility was investigated from the viewpoints of technology and economic potential. This total plant concept consists of a HTGR, chemical reactors and power systems. The HTGR supplies high-temperature heat to the solid oxide steam electrolysis (SOSE), where hydrogen is produced from the steam and electric power at night. Hydrogen and coal gas introduced from a coal gasification system are combined in a chemical reactor to make methanol. After the electric power is converted to methanol, it is used as fuel for the power plant. This electric power can contribute additional electric supply to the peak load during the day

[en] UV irradiation of African green monkey cells greatly stimulated efficiency of simian virus 40 induction from simian virus 40-transformed Syrian hamster cells after cell fusion. The maximum inducing activity was observed at 15 to 20 h after irradiation but remained only transiently. The addition of cycloheximide after UV irradiation eliminated the stimulation of the activity

[en] During the present decade, interest in void swelling has greatly increased due to its importance in fast breeder reactors and nuclear fusion reactors. The objectives of this investigation are to clarify the elemental process of void swelling, the effect of pre-injected helium and the effect of rhenium addition on void swelling process in molybdenum alloys at elevated temperatures upto 1350 K by means of in-situ observation under HVEM. (Auth.)

[en] As a simulation of neutron radiation damage, in situ observations were made by a 1250-kV high-voltage electron microscope (HVEM) with the specimens heated to 1350 K. The objective was to clarify the elemental process of void swelling the effect of preinjected helium, and the effect of rhenium addition on void swelling in molybdenum alloys. Dose dependence and temperature dependence of void swelling were analyzed by the linear after-incubation-swelling model. Helium preinjection made the in situ HVEM experiment more effective as a simulation experiment of fusion reactor and fast breeder reactors. Rhenium addition was very effective in suppressing void swelling in molybdenum alloys and in shifting slightly higher the peak swelling temperature

[en] To determine the source of the small fraction of hydrocarbon found in the gas released when graphite is heated above room temperature experiments are described in which the volume of methane realised at 1040⁰C is determined from nuclear graphite specimens of various histories when heated in helium. The results are summarized and it is concluded that the source of the hydrocarbons is the product of the reaction of graphite with hydrogen formed from the primary reaction of graphite with water. (U.K.)

[en] The fungistatic antibiotics trichostatins (TS) A and C were isolated from culture broth of Streptomyces platensis No. 145 and were found to be potent inducers of differentiation in murine erythroleukemia (Friend and RV133) cells at concentrations of 1.5 X 10(-8) M for TSA and 5 X 10(-7) M for TSC. Differentiation induced by TS was cooperatively enhanced by UV irradiation but not by treatment with dimethyl sulfoxide. This enhanced activity was completely inhibited by adding cycloheximide to the culture medium 2 h after exposure to TS, suggesting that TS are dimethyl sulfoxide-type inducers of erythroid differentiation. No inhibitory effect of TS was observed on macromolecular synthesis in cultured cells

[en] An intracellular activity, which is induced by dimethyl sulfoxide (DMSO) or hexamethylenebisacetamide (HMBA) and leads to erythroid differentiation in mouse Friend cells, was characterized by cell fusion between genetically marked intact cells and cytoplasts. For this, a procedure for rapid selection of cybrids was devised by sensitizing non-fused cells with oligomycin. The authors were able to demonstrate that cytoplasts derived from DMSO- (or HMBA)-treated cells trigger erythroid differentiation upon fusion with UV-irradiated cells. The activity in the cytoplasts remained only transiently and its induction was inhibited by biologically active phorbol esters or cycloheximide. The activity, however, was not induced in cytoplasts by directly treating them with DMSO (or HMBA). These results indicate that (1) the intracellular erythroid-inducing activity is located in cytoplasts, (2) it acts in trans and induces erythroid differentiation as a dominant factor and (3) its production requires de novo nuclear protein synthesis. The mechanisms of the induction of the intracellular activity and of how it triggers erythroid differentiation are discussed

[en] The authors achieved high-speed image processing using the computation power of 100 million arithmetic operations per second of a processor that is mainly used for CT image reconstruction from raw data. Image processing can be done in parallel with image reconstruction by time-sharing. The viewing system without frame buffer can directly access a 32-megabyte-wide main memory, and high-speed cine-display is easily achieved because image data transmission is not involved. These technical features allow real-time multiplanar image reconstruction which generates sagittal, coronal, or oblique images from axial images after a trackball-controlled cursor operation. There is no response delay, and the technique has proved effective for observing complex three-dimensional structures instantaneously. The processor is a general purpose one and can perform many other image processing routines