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Search Results: 1 - 10 of 152115 matches for " H. KOBAYASHI "
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Variation and distribution of some cultivated Triticeae and associated weeds collected in Romania
S. SAKAMOTO,H. KOBAYASHI
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 1982,
Abstract: Based on the "Preliminary report of comparative studies on the Agrico-Pastoral People in the South Western Eurasia", the results obtained by the research group from the Plant Germplasm Institute, Fac. Agr., Kyoto University are briefly presented. Collections and preliminary evaluations were made on Triticum monococcum, T. aestivum, Hordeum vulgare, Secale cereale, Avena sativa, Panicum milliaceum, Agropyron ssp., and weeds (Bromus secalinus, Lolium temulentum) associated with grain fields.
Warm Debris Disks Produced by Giant Impacts During Terrestrial Planet Formation
H. Genda,H. Kobayashi,E. Kokubo
Physics , 2015, DOI: 10.1088/0004-637X/810/2/136
Abstract: In our solar system, Mars-sized protoplanets frequently collided with each other during the last stage of terrestrial planet formation called the giant impact stage. Giant impacts eject a large amount of material from the colliding protoplanets into the terrestrial planet region, which may form debris disks with observable infrared excesses. Indeed, tens of warm debris disks around young solar-type stars have been observed. Here, we quantitatively estimate the total mass of ejected materials during the giant impact stages. We found that $\sim$0.4 times the Earth's mass is ejected in total throughout the giant impact stage. Ejected materials are ground down by collisional cascade until micron-sized grains are blown out by radiation pressure. The depletion timescale of these ejected materials is determined primarily by the mass of the largest body among them. We conducted high-resolution simulations of giant impacts to accurately obtain the mass of the largest ejected body. We then calculated the evolution of the debris disks produced by a series of giant impacts and depleted by collisional cascades to obtain the infrared excess evolution of the debris disks. We found that the infrared excess is almost always higher than the stellar infrared flux throughout the giant impact stage ($\sim$100 Myr) and is sometimes $\sim$10 times higher immediately after a giant impact. Therefore, giant impact stages would explain the infrared excess from most observed warm debris disks. The observed fraction of stars with warm debris disks indicates that the formation probability of our solar system-like terrestrial planets is approximately 10%.
A sliding technique to load thin endothelial donor lamella onto Busin glide for Descemet-stripping automated endothelial keratoplasty
Kobayashi A, Yokogawa H, Sugiyama K
Clinical Ophthalmology , 2012, DOI: http://dx.doi.org/10.2147/OPTH.S34197
Abstract: sliding technique to load thin endothelial donor lamella onto Busin glide for Descemet-stripping automated endothelial keratoplasty Methodology (1314) Total Article Views Authors: Kobayashi A, Yokogawa H, Sugiyama K Published Date August 2012 Volume 2012:6 Pages 1229 - 1231 DOI: http://dx.doi.org/10.2147/OPTH.S34197 Received: 24 May 2012 Accepted: 21 June 2012 Published: 02 August 2012 Akira Kobayashi, Hideaki Yokogawa, Kazuhisa Sugiyama Department of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan Abstract: We describe a modified technique for loading donor corneal endothelial lamella onto a Busin glide without causing wrinkles, as part of the procedure of Descemet-stripping automated endothelial keratoplasty. Briefly, after punching out a composite of the donor-endothelial lamella and a microkeratome-dissected cap, several drops of dispersive ophthalmic viscosurgical device are placed onto the endothelial surface. The Busin glide surface is then wetted with several drops of balanced salt solution. After the composite is transferred onto the Busin glide, hydrodissection of the potential space between the donor-endothelial lamella and the microkeratome-dissected cap is carefully performed to enable smooth detachment of these two lamellae. Whereas simply dragging the donor-endothelial lamella directly onto the glide can cause wrinkling or folding of the donor lamella, this technique enables smooth detachment of the composite without wrinkle or fold formation, and results in less endothelial cell damage.
In vivo laser confocal microscopy findings in patients with map-dot-fingerprint (epithelial basement membrane) dystrophy
Kobayashi A, Yokogawa H, Sugiyama K
Clinical Ophthalmology , 2012, DOI: http://dx.doi.org/10.2147/OPTH.S34196
Abstract: vivo laser confocal microscopy findings in patients with map-dot-fingerprint (epithelial basement membrane) dystrophy Case Series (1491) Total Article Views Authors: Kobayashi A, Yokogawa H, Sugiyama K Published Date July 2012 Volume 2012:6 Pages 1187 - 1190 DOI: http://dx.doi.org/10.2147/OPTH.S34196 Received: 24 May 2012 Accepted: 12 June 2012 Published: 27 July 2012 Akira Kobayashi, Hideaki Yokogawa, Kazuhisa Sugiyama Department of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan Background: The purpose of this study was to investigate pathological changes of the corneal cell layer in patients with map-dot-fingerprint (epithelial basement membrane) dystrophy by in vivo laser corneal confocal microscopy. Methods: Two patients were evaluated using a cornea-specific in vivo laser scanning confocal microscope (Heidelberg Retina Tomograph 2 Rostock Cornea Module, HRT 2-RCM). The affected corneal areas of both patients were examined. Image analysis was performed to identify corneal epithelial and stromal deposits correlated with this dystrophy. Results: Variously shaped (linear, multilaminar, curvilinear, ring-shape, geographic) highly reflective materials were observed in the “map” area, mainly in the basal epithelial cell layer. In “fingerprint” lesions, multiple linear and curvilinear hyporeflective lines were observed. Additionally, in the affected corneas, infiltration of possible Langerhans cells and other inflammatory cells was observed as highly reflective Langerhans cell-like or dot images. Finally, needle-shaped materials were observed in one patient. Conclusion: HRT 2-RCM laser confocal microscopy is capable of identifying corneal microstructural changes related to map-dot-fingerprint corneal dystrophy in vivo. The technique may be useful in elucidating the pathogenesis and natural course of map-dot-fingerprint corneal dystrophy and other similar basement membrane abnormalities.
Attractant and Oviposition Stimulant of Crataeva religiosa Forst. to Pieris rapae
H. Ikeura,F. Kobayashi,Y. Hayata
Asian Journal of Plant Sciences , 2010,
Abstract: We were aimed to confirm the oviposition preference of P. rapae against C. religiosa (Capparidaceae plant) and cabbage (Brassicaceae plant) and then analyzed the AITC and sinigrin contents and myrosinase activity in these plants to clarify the attractant and oviposition stimulant properties of C. religiosa and cabbage to P. rapae. We analyzed the attractant and oviposition stimulant of a Brassicaceae plant, Brassica oleracea var. capitata L. (cabbage) and a Capparidaceae plant, Crataeva religiosa to Pieri srapae crucivora Boisduval by the oviposition preference test. The oviposition preference of P. rapae was the highest in cabbage, followed by C. religiosa, but the lettuce (control plant) was rarely selected. Allylisothiocyanate (AITC), which is assumed to be one of the attractant and sinigrin as oviposition stimulants were detected in cabbage using GC-MS. Their compounds were not detected in C. religiosa, but the higher content of methylisothiocyanate (MITC) that is analogous to AITC was found. Myrosinase activity was analyzed by HPLC and detected in cabbage and C. religiosa, but not in lettuce. Glucosinolate of sinigrin analogous in C. religiosa fractionated by HPLC was decreased by myrosinase treatment and then produced MITC. We identified that this compound was glucocapparin as a precursor of MITC by LC-MS. These results revealed that C. religiosa have a glucosinolate-myrosinase metabolic system and pathway.
A sliding technique to load thin endothelial donor lamella onto Busin glide for Descemet-stripping automated endothelial keratoplasty
Kobayashi A,Yokogawa H,Sugiyama K
Clinical Ophthalmology , 2012,
Abstract: Akira Kobayashi, Hideaki Yokogawa, Kazuhisa SugiyamaDepartment of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, JapanAbstract: We describe a modified technique for loading donor corneal endothelial lamella onto a Busin glide without causing wrinkles, as part of the procedure of Descemet-stripping automated endothelial keratoplasty. Briefly, after punching out a composite of the donor-endothelial lamella and a microkeratome-dissected cap, several drops of dispersive ophthalmic viscosurgical device are placed onto the endothelial surface. The Busin glide surface is then wetted with several drops of balanced salt solution. After the composite is transferred onto the Busin glide, hydrodissection of the potential space between the donor-endothelial lamella and the microkeratome-dissected cap is carefully performed to enable smooth detachment of these two lamellae. Whereas simply dragging the donor-endothelial lamella directly onto the glide can cause wrinkling or folding of the donor lamella, this technique enables smooth detachment of the composite without wrinkle or fold formation, and results in less endothelial cell damage.Keywords: DSAEK, Busin glide, endothelial keratoplasty
In vivo laser confocal microscopy findings in patients with map-dot-fingerprint (epithelial basement membrane) dystrophy
Kobayashi A,Yokogawa H,Sugiyama K
Clinical Ophthalmology , 2012,
Abstract: Akira Kobayashi, Hideaki Yokogawa, Kazuhisa SugiyamaDepartment of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, JapanBackground: The purpose of this study was to investigate pathological changes of the corneal cell layer in patients with map-dot-fingerprint (epithelial basement membrane) dystrophy by in vivo laser corneal confocal microscopy.Methods: Two patients were evaluated using a cornea-specific in vivo laser scanning confocal microscope (Heidelberg Retina Tomograph 2 Rostock Cornea Module, HRT 2-RCM). The affected corneal areas of both patients were examined. Image analysis was performed to identify corneal epithelial and stromal deposits correlated with this dystrophy.Results: Variously shaped (linear, multilaminar, curvilinear, ring-shape, geographic) highly reflective materials were observed in the “map” area, mainly in the basal epithelial cell layer. In “fingerprint” lesions, multiple linear and curvilinear hyporeflective lines were observed. Additionally, in the affected corneas, infiltration of possible Langerhans cells and other inflammatory cells was observed as highly reflective Langerhans cell-like or dot images. Finally, needle-shaped materials were observed in one patient.Conclusion: HRT 2-RCM laser confocal microscopy is capable of identifying corneal microstructural changes related to map-dot-fingerprint corneal dystrophy in vivo. The technique may be useful in elucidating the pathogenesis and natural course of map-dot-fingerprint corneal dystrophy and other similar basement membrane abnormalities.Keywords: cornea, confocal microscopy, map-dot-fingerprint dystrophy, epithelial basement membrane dystrophy, Heidelberg Retina Tomograph 2 Rostock Cornea Module (HRT 2-RCM)
Study of Minimal String Unification in $Z_8$ Orbifold Models
H. Kawabe,T. Kobayashi,N. Ohtsubo
Physics , 1993, DOI: 10.1016/0370-2693(94)91161-4
Abstract: We study the construction of the minimal supersymmetric standard model from the $Z_8$ orbifold models. We use a target-space duality anomaly cancellation and a unification of gauge couplings as constraints. It is shown that some models obtained through a systematical search realize the unification of SU(3) and SU(2) coupling constants.
Levels of U(1)y in Minimal String Model on Z(N)*Z(M) Orbifolds
H. Kawabe,T. Kobayashi,N. Ohtsubo
Physics , 1993, DOI: 10.1016/0370-2693(94)90075-2
Abstract: We study a minimal string model possessing the same massless spectra as the MSSM on $Z_N\times Z_M$ orbifolds. Threshold corrections of the gauge coupling constants of SU(3), SU(2) and U(1)$_Y$ are investigated in a case of an overall modulus. Using computer analyses, we search ranges of levels of U(1)$_Y$ allowed by the LEP experiments. It is found that $Z_3\times Z_3$ can not derive the minimal string model for a $M_Z$ SUSY breaking scale. The minimum values of the overall moduli are estimated within the ranges of the levels.
Quantum Deformation of igl(n) Algebra on Quantum Space
T. Kobayashi,H-T. Sato
Physics , 1995, DOI: 10.1142/S0217732396000576
Abstract: We study quantum deformed $gl(n)$ and $igl(n)$ algebras on a quantum space discussing multi-parametric extension. We realize elements of deformed $gl(n)$ and $igl(n)$ algebras by a quantum fermionic space. We investigate a map between deformed $igl(2)$ algebras of our basis and other basis.
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