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Spatio-temporal variations in photosynthesis

Ichiro Terashima, Yanhong Tang, Hiroyuki Muraoka
2016 Journal of plant research  
The readers who are interested in the studies at the forest ecosystem level including the satellite ecology, refer to recent reviews (Muraoka and Koizumi 2009 , Muraoka et al. 2010 , Chung et al. 2013  ... 
doi:10.1007/s10265-016-0814-3 pmid:27043147 fatcat:mrmczfkbpzgd5bandkyimqcwtm

Utilization of SHR in the detection of cardiotoxicity

Mikinori Torii, Yoshihiro Muraoka, Hiroyuki Ito
1987 Japanese Heart Journal  
doi:10.1536/ihj.28.584 fatcat:pjpmru6ievcv3eii5j6zr3lq7y

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4Ge12

Yoshiaki Nakamura, Hiroyuki Okazaki, Rikiya Yoshida, Takanori Wakita, Hiroyuki Takeya, Kazuto Hirata, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya
2012 Physical Review B  
We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt 4 Ge 12 and PrPt 4 Ge 12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across T c that reflect the opening of the superconducting gap in both compounds and also in observing a noticeable difference in their respective superconducting spectral shapes near the Fermi level, pointing toward a more complex superconducting gap structure in PrPt
more » ... 4 Ge 12 . In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt 4 Ge 12 than the single-isotropic-gap and single-anisotropic-gap models, which suggests an explanation that multiband effects may possibly induce the anomalous superconducting properties of PrPt 4 Ge 12 .
doi:10.1103/physrevb.86.014521 fatcat:tsxpu43ujzhcxotjvmmlgejv6e

Analysis on photoemission spectrum of superconducting FeSe

Rikiya Yoshida, Takanori Wakita, Hiroyuki Okazaki, Yoshikazu Mizuguchi, Shunsuke Tsuda, Yoshihiko Takano, Hiroyuki Takeya, Kazuto Hirata, Yukako Kato, Takayuki Muro, Mario Okawa, Kyoko Ishizaka (+5 others)
2010 Physica. C, Superconductivity  
In this paper, we present the result of soft x-ray photoemission spectroscopy and its comparison with the density functional calculation. Although local density approximation seems to be a good starting point for describing the electronic structure of FeSe, the simulated spectrum poorly reproduced the structure around E B = 2 eV. This result suggests the necessity of theoretical treatment beyond local density approximation.
doi:10.1016/j.physc.2009.11.172 fatcat:4itydf4cbzcxzlh5qphtdn7tpm

Emerging opportunities and challenges in phenology: a review

Jianwu Tang, Christian Körner, Hiroyuki Muraoka, Shilong Piao, Miaogen Shen, Stephen J. Thackeray, Xi Yang
2016 Ecosphere  
been introduced to ILTER-EAP (East Asia-Pacific regional network of ILTER) and J-BoN (Japan Biodiversity observation Network; Muraoka et al. 2013a).  ...  Such data can be compared with the reflectance measured by satellite-based remote sensing (Muraoka et al. 2013b ) and with laboratory assays of leaf traits (Yang et al. 2014 ) that provide physiological  ... 
doi:10.1002/ecs2.1436 fatcat:qstiedwrbjfw7fuhfshab5cira

Electronic Structure of the Novel Filled Skutterudite PrPt4Ge12Superconductor

Yoshiaki Nakamura, Hiroyuki Okazaki, Rikiya Yoshida, Takanori Wakita, Masaaki Hirai, Yuji Muraoka, Hiroyuki Takeya, Kazuto Hirata, Hiroshi Kumigashira, Masaharu Oshima, Takayoshi Yokoya
2010 Journal of the Physical Society of Japan  
We have performed soft x-ray photoemission spectroscopy (SXPES) and resonant photoemission spectroscopy (RPES) of the filled skutterudite superconductor PrPt 4 Ge 12 in order to study the electronic structure of valence band and the character of Pr 4f . SXPES of PrPt 4 Ge 12 measured with 1200 eV photon energy, where spectral contribution of Pr 4f is negligible, was found nearly identical with that of LaPt 4 Ge 12 , indicating similarity of Pt-Ge derived electronic states of the two compounds.
more » ... ood correspondence with band calculations allows us to ascribe the dominant Ge 4p character of the density of states at the Fermi level (E F ). Pr 3d → 4f RPES shows that, although Pr 4f electrons in PrPt 4 Ge 12 are not as strongly hybridized with conduction electrons near E F as in PrFe 4 P 12 , there are finite Pr 4f contribution to the states near E F in PrPt 4 Ge 12 . These PES results give the information of fundamental electronic structure for understanding the physical properties of the novel filled skutterudite superconductor PrPt 4 Ge 12 .
doi:10.1143/jpsj.79.124701 fatcat:yz63qsxxnza7jdqd4hi76whjri

Heat storage due to photosynthesis and respiration activities in forests

Taku M. SAITOH, Ichiro TAMAGAWA, Hiroyuki MURAOKA, Hiroshi KOIZUMI
2010 Journal of Agricultural Meteorology  
This study evaluated heat storage flux or released flux due to biotic activity (S C ) in forests. First, as a case study, we investigated diurnal pattern of S C over an evergreen coniferous forest via a three-year continuous eddy-covariance CO 2 flux measurement. We clarified that (1) in some case, S C reached over 15 of total heat storage flux during the snow-free period (May-October), (2) S C was 4.3 W m -2 on average and reached 4.9-7.0 of average sensible and latent heat fluxes during the
more » ... ow-free period. Second, we estimated S C by using net ecosystem exchange over several forest ecosystems as reported by previous studies. During the snow-free period over several forest ecosystems, the maximum Sc and daily amplitude exceed 3-12 and 4-17 W m -2 respectively. Those values were comparable to those of the latent heat storage flux in the air layer from the ground surface to the level of eddy-covariance measurement over several forest ecosystems as shown by previous reports. Our findings suggest that S C cannot be always ignored. We would need to examine whether S C can be ignored based on the circumstances of the targeted research.
doi:10.2480/agrmet.66.4.9 fatcat:npw2bcb35vd3tih7cjaq5dewp4

FEC recovery performance for video streaming services over wired-wireless networks

Shun Muraoka, Hiroyuki Masuyama, Shoji Kasahara, Yutaka Takahashi
2009 Performance evaluation (Print)  
This paper considers the packet recovery performance of forward error correction (FEC) for video streaming services over wired-wireless networks. Focusing on a wireless base station, we model it as a single-server queueing system with a Markovian service process in which the state of the server alternates between Good and Bad states. The system has two independent input processes: one is a general renewal input process and the other is a Poisson arrival process. We analyze the packet-and
more » ... evel loss probabilities to investigate the recovery performance of FEC at block level. The analysis is validated with simulation experiments driven by real traffic traces. Numerical examples show that the block-loss probability is greatly affected by the system capacity and the mean Bad-state period, and that the recovery performance of FEC deteriorates according to the fluctuation in the packet transmission rate at a wireless base station.
doi:10.1016/j.peva.2008.12.002 fatcat:exzil2mv45dlbaslm2aq6336bm

The ecological process of carbon cycling in terrestrial ecosystems in East Asia

Hiroyuki Muraoka, Yowhan Son, Jingyun Fang
2010 Journal of plant research  
doi:10.1007/s10265-010-0334-5 pmid:20369374 fatcat:gk3jrbhchbbm5oa3hl5yzturtu

Congenital occurrence of solitary infantile myofibromatosis of the spleen

Izumi Muraoka, Yasuharu Ohno, Akira Kamitamari, Masahiko Okada, Hiroyuki Moriuchi, Takashi Kanematsu
2008 Journal of Pediatric Surgery  
Infantile myofibromatosis (IM) is a rare soft tissue tumor of infancy and childhood. We report the case of a newborn girl with an abdominal tumor discovered at 32 weeks of gestation by fetal ultrasound. She underwent a laparotomy for an unexplained abdominal mass 20 days after birth. The tumor originated from the spleen and was removed by splenectomy. There were no other abnormal findings on diagnostic modalities. Based on the histological examinations, the tumor was diagnosed as an IM. Though
more » ... xtremely rare during the neonatal period, solitary type IM should be considered as a differential diagnosis of the splenic tumor.
doi:10.1016/j.jpedsurg.2007.08.060 pmid:18206487 fatcat:ylg4remnfjgnziuobivjea4nn4

Plant ecophysiological processes in spectral profiles: perspective from a deciduous broadleaf forest

Hibiki M. Noda, Hiroyuki Muraoka, Kenlo Nishida Nasahara
2021 Journal of plant research  
and Koizumi 2009; Muraoka et al. 2010) .  ...  Canopy reflectance has been used to estimate canopy structure and photosynthetic production (e.g., Muraoka et al. 2013; Wang et al. 2005) .  ... 
doi:10.1007/s10265-021-01302-7 pmid:33970379 fatcat:rj7vhmpcwbg2lgy5c6npt5g4sq

Angle-resolved photoemission study of Si electronic structure: Boron concentration dependence

Takanori Wakita, Hiroyuki Okazaki, Yoshihiko Takano, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya
2010 Physica. C, Superconductivity  
The boron concentration dependence of the Si electronic structure of Si(100)2×1 surfaces were investigated by angle-resolved photemission spectrosopy (ARPES). The ARPES spectra exhibit rigid shifts toward lower binding energy as the boron concentration increases. The band dispersion was obtained from fitting procedure, and it is found that the top of the valence band does not exceed the Fermi level even with a boron concentration 35 times larger than the critical concentration of the metal-insulator transition.
doi:10.1016/j.physc.2009.11.028 fatcat:hv5dgmh2tfgavmot6qlregfdeu

Long-term and interdisciplinary research on forest ecosystem functions: challenges at Takayama site since 1993

Hiroyuki Muraoka, Taku M. Saitoh, Shin Nagai
2015 Ecological research  
(Muraoka et al. 2005) Inter-annual variation of leafphotosynthesis at TKY site Vegetation indices at TKY and TKC sites Camera indices at TKY and TKC sites (Nagai et al. 2011; Saitoh et al. 2012a)  ...  initiatives for cross-scale observation of ecosystems and for biodiversity-ecosystem-climate change observations in the Biodiversity Observation Network in Japan and in Asia-Pacific (J-BON, AP-BON; Muraoka  ... 
doi:10.1007/s11284-015-1251-9 fatcat:okzz45z74nepxgwmfzp3gq64xe

Increased sarcolemmal permeability in cardiomyopathy in hypertrophied SHR myocardium

Mikinori Torii, Satoshi Inoue, Shuuichi Matsushima, Satoshi Fuji, Toshiyuki Maruyama, Yoshihiro Muraoka, Hiroyuki Ito
1994 Journal of Toxicologic Pathology  
To study the membrane changes in the myocardium, the sarcolemmal permeability of 16
doi:10.1293/tox.7.191 fatcat:6aikzhugurbydetkr5e4stmue4

Diabetic condition induces hypertrophy and vacuolization in glomerular parietal epithelial cells

Takahisa Kawaguchi, Kazuhiro Hasegawa, Itaru Yasuda, Hirokazu Muraoka, Hiroyuki Umino, Hirobumi Tokuyama, Akinori Hashiguchi, Shu Wakino, Hiroshi Itoh
2021 Scientific Reports  
AbstractDiabetic nephropathy (DN) is accompanied by characteristic changes in the glomerulus, but little is known about the effect of diabetes on parietal epithelial cells (PECs). In this study, a descriptive analysis of PECs was undertaken in diabetic db/db mice and in diabetic patients. PEC hypertrophy was significantly more prominent in diabetic mice than in nondiabetic mice, and this was evident even at the early stage. Additionally, the number of vacuoles in PECs was markedly increased in
more » ... iabetic mice, suggesting the presence of cellular injury in PECs in DN. Although rare, binuclear cells were observed in mice with early diabetes. In cultured PECs, a high glucose condition, compared with normal glucose condition, induced cellular hypertrophy and apoptosis. Flow cytometry showed that some PECs in the G0 phase reentered the cell cycle but got arrested in the S phase. Finally, in human diabetic subjects, hypertrophy and vacuolization were observed in the PECs. Our data showed that PECs undergo substantial changes in DN and may participate in rearrangement for differentiation into podocytes.
doi:10.1038/s41598-021-81027-8 pmid:33452384 fatcat:uqvxgyeqtjc5fpgkcdod35foji
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