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308 results on '"Higashihara T"'

27. Three Carbon-Heteroatom Bonds: Esters and Lactones; Peroxy Acids and R(CO)OX Compounds; R(CO)X, X=S, Se, Te

Author

Mahajan, Y. R., additional, Weinreb, S. M., additional, Stien, D., additional, Ziegler, T., additional, Austin, D. J., additional, Miller, S. M., additional, Cook, G. R., additional, Judd, W. R., additional, Katz, C. E., additional, Aub, J., additional, Li, W-R., additional, Luzzio, F. A., additional, Cha, J. K., additional, Tracey, M. R., additional, Hsung, R. P., additional, Antoline, J., additional, Kurtz, K. C. M., additional, Shen, L., additional, Slafer, B. W., additional, Zhang, Y., additional, Ptzel, M., additional, Pritz, S., additional, Liebscher, J., additional, Lipton, M. F., additional, Mauragis, M. A., additional, Manyem, S., additional, Sibi, M. P., additional, Hoffman, R. V., additional, Cesare, V., additional, Coates, C., additional, Kabir, J., additional, Turos, E., additional, Smith, M. B., additional, Lubell, W. D., additional, Blankenship, J. W., additional, Fridkin, G., additional, Kaul, R., additional, Bailey, T. R., additional, Blakemore, P. R., additional, Whitehead, A., additional, Sieck, S. R., additional, Mukherjee, S., additional, Hanson, P. R., additional, Higashihara, T., additional, and Ueda, M., additional

Published
2005
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32. Abundance of virus-sized non-DNase-digestible DNA (coated DNA) in eutrophic seawater

Author

Maruyama, A., Oda, M., and Higashihara, T.

Subjects
DNA -- Measurement, Sea-water -- Research, Biological sciences
Abstract

An effective approach for the detection of coated DNA in natural seawater is discussed. Eutrophic seawater samples were derived from Tokyo Bay and subjected to enzymatic differentiation of free and coated DNA materials, DNA size fractionation and immunochemical-potentiometric DNA quantification. DNA molcular size was also estimated. The dominance of coated DNA in eutrophic seawater was established.

Published
1993

47. Summer-type hypersensitivity pneumonitis: comparison of high-resolution CT and plain radiographic findings

Author

N Kita, Higashihara T, Mitsunori Sakatani, Takenori Kozuka, and Masanori Akira

Subjects
Adult, Male, Radiography, High resolution, Humans, Medicine, Radiology, Nuclear Medicine and imaging, Lung, Aged, Retrospective Studies, medicine.diagnostic_test, business.industry, Respiratory disease, General Medicine, Middle Aged, medicine.disease, Lung density, medicine.anatomical_structure, Summer-Type Hypersensitivity Pneumonitis, Female, Seasons, Tomography, X-Ray Computed, business, Chest radiograph, Nuclear medicine, Hypersensitivity pneumonitis, Alveolitis, Extrinsic Allergic
Abstract

Summer-type hypersensitivity pneumonitis is an immunologic disease that occurs only in Japan. It is a form of hypersensitivity pneumonitis in which the clinical symptoms appear in the summer and subside spontaneously in mid autumn. The purpose of our study was to determine the CT findings in this condition, to compare the CT findings with those on chest radiographs, and to assess the variations in the CT findings over time. Accordingly, high-resolution CT scans and chest radiographs of 15 patients with summer-type hypersensitivity pneumonitis were retrospectively studied. Seven patients had sequential CT examinations 18-37 days apart. The CT scans and chest radiographs were reviewed by two observers independently. CT findings included diffuse micronodules (n = 15), slightly elevated lung density (n = 13), and patchy air-space consolidation (n = 13). In one patient, the findings on a chest radiograph were normal, while CT showed parenchymal abnormalities. In two cases, follow-up CT showed micronodular abnormalities after findings on the chest radiograph had returned to normal. Our results show that high-resolution CT findings of summer-type hypersensitivity pneumonitis include pulmonary micronodules, increased lung density, and air-space consolidation. High-resolution CT appears to be more useful than plain chest radiographs in the evaluation of pulmonary parenchymal abnormalities in this condition.

Published
1992

49. Modified epiphyseal index for MRI in Legg-Calve-Perthes disease (LCPD)

Author

Koushi Harada, K. Sakurai, H. Kishimoto, Y. Kumasaka, Higashihara T, H Watanabe, and Takahiro Kozuka

Subjects
Male, Aging, Adolescent, Radiography, Avascular necrosis, Femoral head, Humans, Medicine, Legg-Calve-Perthes disease, Radiology, Nuclear Medicine and imaging, Stage (cooking), Child, business.industry, Ultrasound, Femur Head, Anatomy, medicine.disease, Magnetic Resonance Imaging, medicine.anatomical_structure, Epiphysis, Child, Preschool, Coronal plane, Pediatrics, Perinatology and Child Health, Legg-Calve-Perthes Disease, business, Epiphyses
Abstract

On radiographs flattening of the femoral head is evaluated by the Epiphyseal Index (EI). Using the ability of MRI to show articular cartilage and the physis clearly, we wish to propose the use of an Epiphyseal Index for MRI (EIM) and demonstrate the value in LCPD. Fifteen patients were examined using 1.5T MR scanner and T1-weighted coronal images were obtained. EIM was calculated as a ratio of height and width of cartilaginous contour surrounding epiphysis, and was compared between normal and the three radiographic stages. EIM of normal hips were ranged from 0.39 to 0.60 and had a tendency to decrease with increasing age. All cases of Stage 1 (avascular necrosis) were within the normal range (n = 4, mean = 0.51, SD = 0.045). EIM of Stage 2 (fragmentation, n = 15, mean = 0.31, SD = 0.055) were smaller than that of Stage 1. Stag 2 and 3 (residual, n = 12, mean = 0.31, SD = 0.077) could not be distinguished by EIM. EIM was useful to show the flattening of epiphysis with growth and very important for differentiation between Stage 1 and 2 LCPD.

Published
1991

50. Chloride ion concentrations during the compression of rocks to extract pore water.

Author

Nakata, K., Hasegawa, T., Oyama, T., and Higashihara, T.

Subjects
CHLORIDE ions, PORE water, ROCK permeability, ION analysis, SMECTITE
Abstract

Pore water needs to be extracted from rocks with low permeabilities to allow the major ion concentrations in the pore water to be estimated. Compressing a rock is the most widely used method of extracting the pore water. However, ion concentrations have been found to change during compression in previous studies, and the mechanisms involved in such ion concentration changes have not yet been fully assessed. In this study, two natural rocks and four artificially prepared samples were compressed, and changes in the chloride ion (Cl−) concentrations as the compression pressure increased were investigated. Mechanisms that could have caused the changes observed were then assessed. The Cl− concentrations in squeezed water decreased as the pressure increased if the sample contained a significant amount of smectite. The strong dependence of Cl− concentration on the amount of smectite indicated that smectite played an important role in decreasing the Cl− concentration. The dilution of the pore water with interlayer water from the smectite appeared to be the dominant mechanism involved in the decrease in Cl− concentration found in a Kunigel-V1 sample, because dilution of the pore water with interlayer water quantitatively explained the decrease in the Cl− concentration. The filter effect caused by the anion exclusion effect did not appear to be a dominant mechanisms in our case. However, Cl− concentration decrease found in natural rocks could not be fully explained by dilution with interlayer water, so other mechanisms must be involved the phenomenon in natural rocks. [ABSTRACT FROM AUTHOR]

Published
2016
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