Radiocarbon datings of Yamato meteorites

The terrestrial ages of five Yamato Meteorites were measured by the content of cosmic-ray-produced carbon-14. Three Yamato Meteorites Y-74013, Y-74097, and Y-74136, which are all diogenites, were found at sites from one to two kilometers apart from each other. Evidence is presented for these three meteorites being a single meteorite. Also presented is a method adopted in the experimental procedure which includes a check for modern carbon contamination in the meteorites

Differential Scanning Calorimetry Study of Fluoride Complexes of Germanium, Tungsten, Uranium, Lithium and Gallium

The enthalpy and temperature of the sublimation, dissociation and transition of nitrosyl fluoride-germanium, tungsten, uranium, lithium and gallium fluoride adducts were determined from DSC measurements. These adducts were produced using the 80 mole % HF-20 mole % NO_2 solvent. The following facts were found from the DSC measurements of these adducts. (NO)_2Li_5F_7 is converted into LiF through one thermal dissociation step. Three thermal dissociation steps are observed for the reaction of (NO)_3Ga_2F_9 to the final form of GaF_3. NOGeF_5 sublimates without preceeding reaction, but in the cases of NOWF_7 and NOUF_6 one and two transitions are observed, respectively, prior to their sublimation

Recent Trends Concerning the Issue of ‘Buddhism and Practice’ in Contemporary Japan

When discussing Buddhism in practice, we should first note that the word practice has a multilayered meaning in Buddhism. For the purposes of this paper, I would like to simplify things considerably, and divide those multiple meanings into two groups. The first involves the training of one’s mind and body. By engaging in such training, the practitioner is said to draw closer to Buddhist enlightenment. This practice takes various forms depending on the time and place, such as observing the precepts or engaging in meditation, and is referred to as ‘benefiting the self’ (jiri 自利). Second, there is the practice that consists of Buddhists’ activities vis-à-vis society. Even Buddhists, whose fundamental orientation is towards leaving the secular world (shusseken 出世間), have engaged in activities in society that have taken a variety of forms. There are records of Śākyamuni having given various pieces of advice to rulers during ancient times. We also find many records of later Buddhists engaging in missionary and charitable activities. This is referred to as ‘benefiting others’ (rita 利他). In particular, Mahayana Buddhism emphasizes the inseparability of ‘benefiting the self’ and ‘benefiting others.’ Although Buddhist practice is traditionally divided into two categories: self-interest and altruism, it would not be true to say, in fact, that "benefiting others" has always been as much of a primary concern as "benefiting the self." Rather, it can be said that concern for others has always been a weakness of Buddhism, overshadowed by concerns with ‘benefiting the self.’ Thus, Mahayana Buddhism's emphasis on the importance of benefiting others, on the contrary, could be said to imply that this was a weakness of the Buddhism at the time of the Mahayana arose. My paper focuses on recent developments surrounding Buddhism and its practice in contemporary Japan, particularly the element of ‘benefiting others.’ The question of how Buddhists should contribute to society has continually and repeatedly appeared from the origins of Mahayana Buddhism to the present. Against this backdrop, an event occurred in Japan in recent years that marked a major turning point in the issue of Buddhist contributions to society. That event is the Great East Japan Earthquake of 2011. In this paper, I consider the issue of ‘benefiting others’ in Buddhism in light of the effects of the tragic earthquake disaster

Monel and Nickel Corrosion in Nonaqueous NO_2-HF Solutions

The corrosion rates of Monel alloy 400 and Nickel 200 were studied in several NO_2-HF solutions that seem promising for use in reprocessing nuclear reactor fuels. Special probes fabricated of Monel or nickel wire were immersed in solutions containing up to 30 mole % NO_2 and heated in the range 25°to 150℃. The progress of surface corrosion was followed by measuring the change in electrical resistance of the wire probes. In general, nickel was superior to Monel. Increasing concentrations of NO_2 were used, and the first detectable corrosion of Monel occurred in 20 mole % NO_2-80 mole % HF solution at 150℃. For nickel the conditions were 25 mole % NO_2 and 125℃. In solutions containing 25 and 30 mole % NO_2, the high initial corrosion rate of Monel grdually decreased to a very low value because of formation of a protective film. This film was strong enough to endure large changes in concentration or temperature. Moisture had a severe effect on vapor phase corrosion of both Monel and nickel. Dissolved UO_2 or the presence of H_2O increased corrosion in the liquid phase. The effect of stress on surface corrosion was insignificant in the elastic range, but in the plastic range it greatly increased both the initial corrosion rate and total corrosion during film formation. Under the conditions of these studies both Monel and nickel were satisfactory materials of construction

Studies on Treatment of Uranium Ores. I : Leaching of Uranium Ore from the Matsuiwa Mine

Studies were made of several processes of extracting uranium with the uraniferrous ore from the Ryusei pit, Matsuiwa Mine, Miyagi Prefecture, assaying 0.081 per cent U. Three series of experiments were carried out as follows : (1) Pressure oxidation leaching of the uranium ore in carbonate solutions containing gaseous oxygen. (2) Leaching the roasted ore in sulfuric acid. (3) Pressure and atmospheric oxidation leachings of the ore in acids. The results obtained show that the atmospheric oxidation leaching with dilute sulfuric acid was an attractive method for extraction of uranium from such low grade ore as this. By this method over 96 per cent of uranium, together with some copper and from 0.3 to 2 per cent of iron were extracted at 60℃ in 6 hours. The same results were obtained with nitric acid and the atmospheric leaching in water with oxygen recovered over 80 per cent of uranium

米国議会図書館所蔵『梅若一代記図絵』をめぐって

Author Institution: Kanazawa Universit

The Extraction of Niobium and Tantalum from Columbite by the Nitrofluor Process

The Nitrofluor process provides a through method of dissolving the columbite in a nonaqueous inorganic solvent, purifying the niobium and tantalum, and separating them each other by volatile separation techniques. HF solutions of N_2O_3, N_2O_4 or NOF can disintegrate the columbite even at a room temperature. Subsequently, most of the niobium and tantalum precipitate as complex fluorides, leaving in the solution relatively large quantities of impurities, such as iron, manganese, titanium and tin. For further isolation of the complex fluorides of niobium and tantalum from the impurities, a volatilization of the niobium and tantalum from the dissolver solid separated from the dissolver solution is found effective. There appears to be a possibility of separating niobium and tantalum from each other by fractional sublimation utilizing the difference of volatility of these complex fluorides when the HF-N_2O_3 azeotrope is used for disintegrating the columbite. A general flowsheet for treating typical columbite or tantalite by the Nitrofluor process is proposed

Differential Scanning Calorimetry Study of Complex Fluorides of Titanium, Niobium and Tantalum

The enthalpy and temperature of the sublimation of nitrosyl fluoride or nitryl fluoride-titanium, niobium and tantalum fluoride adducts were determined from DSC measurements. These adducts were prepared by the reactions of titanium dioxide, metallic niobium and tantalum with the 80 mol% HF-20 mol% NO_2 solvent, the 52° or 68° materials. A closed-cell DSC technique was employed to determine the enthalpies and temperatures and to study the dissociation reactions of some of these adducts. It was found that the adducts, NOTiF_5, NO_2NbF_6 and (NO)_2TaF_7, are converted into NOTi_2F_9, NONbF_6 and NOTaF_6, and then these complex fluorides sublimate at 319, 328 and 374℃, respectively. The enthalpies of the sublimation detected were 20.2, 27.4 and 17.6 kcal mol^, respectively

Recent Trends Concerning the Issue of ‘Buddhism and Practice’ in Contemporary Japan

When discussing Buddhism in practice, we should first note that the word practice has a multilayered meaning in Buddhism. For the purposes of this paper, I would like to simplify things considerably, and divide those multiple meanings into two groups. The first involves the training of one’s mind and body. By engaging in such training, the practitioner is said to draw closer to Buddhist enlightenment. This practice takes various forms depending on the time and place, such as observing the precepts or engaging in meditation, and is referred to as ‘benefiting the self’ (jiri 自利). Second, there is the practice that consists of Buddhists’ activities vis-à-vis society. Even Buddhists, whose fundamental orientation is towards leaving the secular world (shusseken 出世間), have engaged in activities in society that have taken a variety of forms. There are records of Śākyamuni having given various pieces of advice to rulers during ancient times. We also find many records of later Buddhists engaging in missionary and charitable activities. This is referred to as ‘benefiting others’ (rita 利他). In particular, Mahayana Buddhism emphasizes the inseparability of ‘benefiting the self’ and ‘benefiting others.’ Although Buddhist practice is traditionally divided into two categories: self-interest and altruism, it would not be true to say, in fact, that "benefiting others" has always been as much of a primary concern as "benefiting the self." Rather, it can be said that concern for others has always been a weakness of Buddhism, overshadowed by concerns with ‘benefiting the self.’ Thus, Mahayana Buddhism's emphasis on the importance of benefiting others, on the contrary, could be said to imply that this was a weakness of the Buddhism at the time of the Mahayana arose. My paper focuses on recent developments surrounding Buddhism and its practice in contemporary Japan, particularly the element of ‘benefiting others.’ The question of how Buddhists should contribute to society has continually and repeatedly appeared from the origins of Mahayana Buddhism to the present. Against this backdrop, an event occurred in Japan in recent years that marked a major turning point in the issue of Buddhist contributions to society. That event is the Great East Japan Earthquake of 2011. In this paper, I consider the issue of ‘benefiting others’ in Buddhism in light of the effects of the tragic earthquake disaster

FACTORS ASSOCIATED WITH DECELERATION OF RUNNING VELOCITY IN THE LAST PHASE OF THE 400-M SPRINT BASED ON KINETICS CHANGES

The purpose of this study was to investiThe purpose of this study was to investigate the factors associated with deceleration of running velocity during the 400-m sprint (at the 350-m point) based on kinetics changes. Fourteen male collegiate sprinters performed the 400-m sprint (50.26 ± 2.27 s) at a subjective effort level of 100%. The ground reaction force (1000 Hz) was measured 350 m from the start point, and running movements were recorded from the side by a high-speed camera (300 Hz). The results were as follows: 1) High running velocity was associated with a high stride length. 2) A statistically significant positive correlation was observed between the stride length and the angular impulse of hip flexion in the second half of the support phase. These results suggest that the angular impulse of hip flexion is higher, the leg which has been supported is being swung out forward greatly after ground release