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Search Results: 1 - 10 of 139141 matches for " Yoshimura K "
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Thorium isomer for radiative emission of neutrino pair
N. Sasao,S. Uetake,A. Yoshimi,K. Yoshimura,M. Yoshimura
Physics , 2013,
Abstract: It is proposed to use the isomer ionic ground state $^{229m}$Th$^{4+}$ embedded in transparent crystals for precision determination of unknown neutrino parameters. Isolation from solid environment of the proposed nuclear process, along with available experimental techniques of atomic physics, has a great potentiality for further study.
Deviation from the Kadowaki-Woods relation in Yb-based intermediate-valent systems
N. Tsujii,K. Yoshimura,K. Kosuge
Physics , 2003, DOI: 10.1088/0953-8984/15/12/316
Abstract: The T^2 coefficient of electrical resistivity, A, is compared with the electronic specific-heat coefficient, \gamma, for a number of Yb-based compounds. It is revealed that many systems including YbCuAl, YbInCu4, YbAl3 and YbCu5 show A/\gamma^2 values close to 0.4*10^{-6} \mu\Omega cm(mol K/mJ)^2, which is remarkably smaller than that known as the Kadowaki-Woods relation, A/\gamma^2 = 1.0*10^{-5} \mu\Omega cm(mol K/mJ)^2. Empirically, the compounds with the smaller A/\gamma^2 values appear to show weak intersite magnetic-correlation and/or to have almost fully-degenerated (J = 5/2 or 7/2) ground states.
Irradiance and Developmental Stages of Crown Architecture Affect Shoot Production in Rhododendron reticulatum  [PDF]
Kenichi Yoshimura
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.45A011
Abstract:

Plasticity in crown architecture, contributing to leaf arrangement within crown, is an important feature for whole plant carbon assimilation and survival. In this study, I examined the plasticity in crown architecture to light condition and developmental stage by the changes in shoot production. Rhododendron reticulatum expands crown with orthotropic growth in monopodial branching in young stage, but orthotropic growth is ceased in adult stage. Main stem of young crown is described with monopodial branching regardless of light environment. But multi-layer crown is observed in sun-lit environment rather than mono-layer crown in adult stage. Long shoot production for each branching system (foliage derived from sympodial branching) in young crown is associated with local light environment, but not in adult crown. Long shoot production rate is correlated with long shoot production rate of its mother shoot in young crown, but not in mono-layer crown. These results suggest that young crown expands branches to sun-lit position whereas adult crown reduces congestion of shoots with stochastic shoot production regardless of shoot production of mother shoots. I concluded that both light and developmental stage are important factors for shoot production and constructing crown architecture.

Erratum to “Irradiance and Developmental Stages of Crown Architecture Affect Shoot Production in Rhododendron reticulatum” [American Journal of Plant Sciences 4 (2013) 69-76]  [PDF]
Kenichi Yoshimura
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.513214
Abstract:

The original online version of this article (Yoshimura, K. (2013) Irradiance and Developmental Stages of Crown Architecture Affect Shoot Production in Rhododendron reticulatum. American Journal of Plant Sciences, 4, 69-76. http://dx.doi.org/10.4236/ajps.2013.45A011) was published as a single-author paper mistakenly. To reflect the contribution and responsibility of the second author as well as the affiliations of the authors at the time of the study, we have revised the authorship and author affiliations of this article. The author wishes to correct the errors as:


Kenichi Yoshimura1,2, Hiroaki Ishii1

1Graduate School of Science and Technology, Kobe University, Kobe, Japan

2Present Address: Center for Ecological Research, Kyoto University, Otsu, Japan

Email:

The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMOiso
S. Pfahl, H. Wernli,K. Yoshimura
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2012,
Abstract: Stable water isotopes are valuable tracers of the atmospheric water cycle, and potentially provide useful information also on weather-related processes. In order to further explore this potential, the water isotopes H218O and HDO are incorporated into the limited-area model COSMO. In a first case study, the new COSMOiso model is used for simulating a winter storm event in January 1986 over the eastern United States associated with intense frontal precipitation. The modelled isotope ratios in precipitation and water vapour are compared to spatially distributed δ18O observations. COSMOiso very accurately reproduces the statistical distribution of δ18O in precipitation, and also the synoptic-scale spatial pattern and temporal evolution agree well with the measurements. Perpendicular to the front that triggers most of the rainfall during the event, the model simulates a gradient in the isotopic composition of the precipitation, with high δ18O values in the warm air and lower values in the cold sector behind the front. This spatial pattern is created through an interplay of large scale air mass advection, removal of heavy isotopes by precipitation at the front and microphysical interactions between rain drops and water vapour beneath the cloud base. This investigation illustrates the usefulness of high resolution, event-based model simulations for understanding the complex processes that cause synoptic-scale variability of the isotopic composition of atmospheric waters. In future research, this will be particularly beneficial in combination with laser spectrometric isotope observations with high temporal resolution.
Expression of GD2 and GD3 gangliosides in human embryonic neural stem cells
Makoto Yanagisawa,Saori Yoshimura,Robert K Yu
ASN Neuro , 2011, DOI: 10.1042/an20110006
Abstract: NSCs (neural stem cells) are undifferentiated neural cells endowed with a high potential for proliferation and a capacity for self-renewal with retention of multipotency to differentiate into neurons and glial cells. It has been recently reported that GD3, a b-series ganglioside, is a marker molecule for identifying and isolating mouse NSCs. However, the expression of gangliosides in human NSCs is largely unknown. In the present study, we analysed the expression of gangliosides, GD2 and GD3, in human NSCs that were isolated from human brains at gestational week 17 in the form of neurospheres, which are floating clonal aggregates formed by NSCs in vitro. Employing immunocytochemistry, we found that human NSCs were strongly reactive to anti-GD2 antibody and relatively weakly reactive to anti-GD3 antibody. Treatment of these cells with an organic solvent such as 100% methanol, which selectively removes glycolipids from plasma membrane, abolished the immunoreactivity with those antibodies, indicating that the reactivity was due to GD2 and GD3, but not to GD2-/GD3-like glycoproteins or proteoglycans. The immunoreactivity of human NSCs to antibody against SSEA-1 (stage-specific embryonic antigen-1), a well-known carbohydrate antigen of NSCs, was not decreased by the treatment with 100% methanol, indicating that SSEA-1 is mainly carried by glycoproteins and/or proteoglycans in human NSCs. Our study suggests that GD2 and GD3 can be marker gangliosides for identifying human NSCs.
The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMOiso
S. Pfahl,H. Wernli,K. Yoshimura
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2012, DOI: 10.5194/acp-12-1629-2012
Abstract: Stable water isotopes are valuable tracers of the atmospheric water cycle, and potentially provide useful information also on weather-related processes. In order to further explore this potential, the water isotopes H218O and HDO are incorporated into the limited-area model COSMO. In a first case study, the new COSMOiso model is used for simulating a winter storm event in January 1986 over the eastern United States associated with intense frontal precipitation. The modelled isotope ratios in precipitation and water vapour are compared to spatially distributed δ18O observations. COSMOiso very accurately reproduces the statistical distribution of δ18O in precipitation, and also the synoptic-scale spatial pattern and temporal evolution agree well with the measurements. Perpendicular to the front that triggers most of the rainfall during the event, the model simulates a gradient in the isotopic composition of the precipitation, with high δ18O values in the warm air and lower values in the cold sector behind the front. This spatial pattern is created through an interplay of large scale air mass advection, removal of heavy isotopes by precipitation at the front and microphysical interactions between rain drops and water vapour beneath the cloud base. This investigation illustrates the usefulness of high resolution, event-based model simulations for understanding the complex processes that cause synoptic-scale variability of the isotopic composition of atmospheric waters. In future research, this will be particularly beneficial in combination with laser spectrometric isotope observations with high temporal resolution.
Surface Nanoscience
Rakesh K. Joshi,Masamichi Yoshimura,Kazuyuki Ueda
Journal of Nanomaterials , 2007, DOI: 10.1155/2007/71869
Abstract:
Graphene
Rakesh K. Joshi,Masamichi Yoshimura,Ashok Kumar
Journal of Nanomaterials , 2010, DOI: 10.1155/2010/915937
Abstract:
Graphene
Rakesh K. Joshi,Masamichi Yoshimura,Ashok Kumar
Journal of Nanomaterials , 2010, DOI: 10.1155/2010/915937
Abstract:
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