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Nishimura,Y.,Suzuki,S.,조백현,박진수,김병묵 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.4
The general principle of treating a giant pigmented nevus is total resection of the lesion to prevent malignant change, followed by coverage of the skin defect with either flap or free skin graft. The problem in giant pigmented nevus lies in that enough skin to cover such a large defect is not readily available. The authors have developed a bilayer artificial skin composed of an upper silicone sheet and a lower collagen sponge sheet, and have applied it clinically with success. In using the artificial skin, the lower sheet is spontaneously converted to synthesized connective tissue matrix similar to dermis through the invasion of fibroblasts and capillaries, which allows for an easy take of a secondary skin graft. There is no significant histological and cosmetic difference between the area treated with the artificial skin plus very thin split thickness skin graft(0.2mm) and that treated with ordinary split thickness skin graft(about 0.5mm). Our recent experience with the use of an artificial skin combined with a very thin split thickness skin graft would be the best solution of the problem, at least at this stage of the research development, because it permits harvesting skin graft from the same site twice or more times, multiplying the usable skin areas in effect.
Nishimura, Ryosei,Akiyama, Yoko,Manabe, Yuichiro,Sato, Fuminobu The Korean Society of Superconductivity and Cryoge 2021 한국초전도저온공학회논문지 Vol.23 No.3
Advanced classification of Cs contaminated soil by using a magnetic force-assisted selection pipe was investigated. A selection pipe is a device that sort particles depending on their particle size, based on the relationship between buoyancy, drag, and gravity force acting on the particles. Radioactive cesium is concentrated in small-particle size soil components with a large specific surface area. Hence, the volume of the Cs contaminated soil can be reduced by recycling the large-particle size soil components with low radioactive concentration. One of the problems of the selection pipe was that the radioactive concentration of the stayed soil in the selection pipe exceeds 8000 Bq/kg, which is the standard value of recycling of Cs contaminated soil, due to low classification accuracy. In this study, magnetic fields were applied to the lab-scale selection pipe from upper side to improve the classification accuracy and to reduce the radioactive concentration of the stayed soil.
Photodynamics of an excited triplet state in the presence of molecular oxygen cluster
Nishimura, Yoshinobu Korean Society of Photoscience 2013 Rapid communication in photoscience Vol.2 No.3
Bulk nanobubble is one of the nanoscopic gaseous state found in the solution. We measured transient absorption spectra of eosin Y in the excited triplet state ($^3EY^{2-*}$) to elucidate differences in the dissipation process of the bulk nanobubble of oxygen molecule at air pressure. The time dependence of the oxygen dissipation process was classified three time domains (P1, P2 and P3). The comparison of ordinary bubbling method gave different results at P3 in contrast to similar results at P1 and P2, indicating the existence of characteristic dissolving state in the case of nanobubble.
Genetic Relationships between MUN, and Predicted DCPun in Hokkaido Holstein Cows
Nishimura, Kazuyuki,Miura, Shinya,Suzuki, Mitsuyoshi Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.9
This study aimed to use field data collected by the Hokkaido Dairy Cattle Milk Recording and Testing programs to estimate genetic parameters for concentration of milk urea nitrogen (MUN) and predicted Digestive Crude Protein Percentage of requirement (DCPun). Edited data consisted of 5,797,500 test-day records of MUN and yields of milk, fat, and protein obtained from 783,271cows in Holstein herds in Hokkaido, Japan. Data were divided into four datasets; for the first, second, third and fourth lactations. Two analyses were performed on data from each lactation. First, ANOVA was used to estimate the significance of the effects of several environmental factors on MUN and DCPun, after absorbing the Herd-Test-Day (HTD) effects. The effects of DIM and age.season effects had significant impact on MUN and DCPun. The second used a multi-traits repeatability model (MTRM) to estimate heritabilities and genetic correlations of milk with MUN and DCPun. Heritability estimates for MUN and DCPun in the first, second, and third lactations were 0.21:0.16, 0.20:0.16, and 0.20:0.18, respectively. Genetic correlations for milk with MUN and DCPun in the first, second, and third lactations were 0.02 - 0.17, and -0.25 - -0.39, respectively. The results indicate that MUN and DCPun are possibly effective tools for improving the energy balance, but that the relationships between MUN and other economically important traits such as feed efficiency, metabolic disease and fertility are still necessary.
Nishimura, F .,Morino, K .,Nisitani, H . 대한금속재료학회(대한금속학회) 2000 METALS AND MATERIALS International Vol.6 No.6
In this paper, in order to clarify the effect of crack coalescence for crack growth rate, low cycle fatigue tests were carried out using two kinds of spheroidal graphite cast iron (SGI). Crack propagation behavior from crack initiation to fracture was investigated by observing the surface of specimens and their fracture section. 'The main results obtained are as follows: (1) The variation range in the crack growth curves in SGI is larger than that in its matrix material. This tendency is caused by the occurrence of crack coalescence and the difference in crack initiation length. (2) In most of the cases where the crack growth rate accelerated, there was microshrinkage on the neighboring surface. (3) Crack coalescence is not the main factor in accelerating crack growth rate.