Chromosome number and telomere sequence mapping of the Japanese sea cucumber Apostichopus japonicus     

Sei-Ichi Okumura  Kazuma Kimura  Mizuho Sakai  Takashi Waragaya  Suehiro Furukawa  Akiyoshi Takahashi  Kunio Yamamori 《Fisheries Science》2009,75(1):249-251

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Mapping rice-planted areas using time-series synthetic aperture radar data for the Asia-RiCE activity     

Kei Oyoshi  Nobuhiro Tomiyama  Toshio Okumura  Shinichi Sobue  Jun Sato 《Paddy and Water Environment》2016,14(4):463-472

In Asia, rice is a staple cereal crop and the continent accounts for about 90 % of the global rice production and consumption. Statistics on the areas planted with rice or production of paddy rice are fundamental to agriculture-related decisions or policy-making. Asia-Rice Crop Estimation & Monitoring (Asia-RiCE) aims to develop rice-related information, such as paddy field maps, rice growing conditions, yield, and production, using remote sensing tools and disseminate the same at the local and global scales. In this paper, we propose a methodology for the identification of rice-planted areas by using multi-temporal SAR images; a software named INternational Asian Harvest mOnitoring system for Rice (INAHOR) was developed to manipulate the proposed algorithm. The INAHOR uses the imagery observed both at the time of planting of rice and grown-up stages. In this study, two thresholds needed for the INAHOR were optimized based on the detailed land cover data collected through a field survey. Rice-planted areas across the study area in Japan were identified by the INAHOR using the RADARSAT-2 Wide Fine beam mode data. The classification results of RADARSAT-2 VV and VH polarizations were compared. The data with VH polarization showed a higher total accuracy of 83 % with ?20.5 dB and 3.0 dB for the minimum and range thresholds, respectively. The INAHOR is currently being used with the RADARSAT-2, ALOS, and ALOS-2 SAR data in the Southeast Asian countries to assess the robustness of the thresholds and classification accuracies under the framework of Asia-RiCE.  相似文献   

Energy utilisation of medium chain triglyceride in comparison with long chain triglyceride in growing chicks.     

R T Mabayo  M Furuse  J Okumura 《British poultry science》1992,33(4):883-887

1. To evaluate the relative efficiency of energy utilisation of medium chain triglyceride (MCT) compared to long chain triglyceride (LCT), Single Comb White Leghorn 7-d-old male chicks were allocated into 4 experimental groups and one control of 5 birds per group. The chicks in the control group (Group 1) were given 5 g basal diet each day for 10 d. The birds in groups 2 and 3 received 5 g basal diet/d supplemented with MCT to provide 33.5 kJ GE/d and 67.0 kJ GE/d, and those in groups 4 and 5 were supplemented with LCT at 31.9 kJ GE/d and 63.8 kJ GE/d, respectively. Energy retained as protein and fat, and total energy retentions were measured. 2. No significant differences were found in energy retention as protein between the four energy supplemented groups but significant differences in fat and total energy retentions were found between the different dietary energy contents but not between energy source. Net energy of MCT for production was calculated as 16.0 kJ/g which corresponds to about 74% of that of LCT (22.8 kJ/g).  相似文献   

Fluctuations in hemolymph ecdysteroid levels during the reproductive and non-reproductive molt cycles in the giant freshwater prawn Macrobrachium rosenbergii     

Takuji Okumura  Katsumi Aida 《Fisheries Science》2000,66(5):876-883

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Regulation of programmed death ligand 1 expression by interferon-γ and tumour necrosis factor-α in canine tumour cell lines     

Ryo Owaki  Tatsuya Deguchi  Satoru Konnai  Naoya Maekawa  Tomohiro Okagawa  Kenji Hosoya  Sangho Kim  Takafumi Sunaga  Masahiro Okumura 《Veterinary and comparative oncology》2023,21(2):279-290

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Throughfall,stemflow and interception loss in a mixed white oak forest (Quercus serrata Thunb.)     

Israel Cantú Silva  Takenobu Okumura 《Journal of Forest Research》1996,1(3):123-129

Throughfall and stemflow measurements in a 60-year-old white oak stand (Quercus serrata Thunb.) were carried out during two periods totalling eleven months, from August to November 1993 and from May to November 1994, in order to clarify the rainfall partitioning of this forest. Troughs and spiral-type stemflow gauges connected to tipping bucket-gauges were used for throughfall and stemflow measurements. Seventy-five storms were analyzed individually. Coefficients of variation for throughfall and stemflow ranged between 5–25% and 20–70% respectively. Partitioning of net rainfall in throughfall and stemflow represent 72% and 10% of the gross rainfall respectively. Multiple regression analyses were carried out to determine the stemflow variability. In was determined that maximum rain intensity was highly correlated with stemflow and this variable explained a further 5.5% of the stemflow variation. Estimates of averaged lag time and drainage after rain cease for stemflow were 290 and 164 min, while estimates for throughfall were 60 and 104 min. respectively. The canopy saturation was estimated from continuous storms and showed a value of 0.6 mm. The trunk storage capacity was estimated at a value of 0.2 mm. The interception loss from the forest canopy was estimated in 18%. Interception loss was heighly correlated with rainfall characteristics such as duration and intensity.  相似文献   

Relationship between roughness parameters based on material ratio curve and tactile roughness for sanded surfaces of two hardwoods     

Yuko Fujiwara  Yoshihisa Fujii  Shogo Okumura 《Journal of Wood Science》2005,51(3):274-277

The roughness parameters on the material ratio curves were related to tactile roughness for samples of buna and mizunara. The surfaces of the samples were sanded using various grades of coated abrasives and the roughness parameters, reduced peak height (Rpk), core roughness depth (Rk), and reduced valley depth (Rvk), were estimated on the material ratio curves, which were obtained from roughness profiles determined using robust Gaussian regression filter. The values of Rpk and Rk were almost the same for buna and mizunara under the same sanding conditions and increased exponentially with tactile roughness. The coefficients of determination of those parameters and tactile roughness were higher than 0.79 at all cutoff wavelengths. On the other hand, the value of Rvk for mizunara was significantly larger than that for buna because of the deep local valleys. There was no relationship between Rvk and tactile roughness for both species.  相似文献   

Thickness variation of the G-layer along a mature and a differentiating tension wood fiber in Populus euramericana     

Shogo Okumura  Hiroshi Harada  Hiroshi Saiki 《Wood Science and Technology》1977,11(1):23-32

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Clinical pharmacokinetics of anti-angiogenic photodynamic therapy with benzoporphyrin derivative monoacid ring-A in dogs having naturally occurring neoplasms     

Osaki T  Hoshino S  Hoshino Y  Takagi S  Okumura M  Kadosawa T  Fujinaga T 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2006,53(2):108-112

The aim of this study was to examine the pharmacokinetics of clinically applied benzoporphyrin derivative monoacid ring-A (BPD-MA; Verteporfin), a second-generation photosensitizer, during a trial of photodynamic therapy (PDT) in nine dogs having naturally occurring neoplasms. After injecting BPD-MA at 0.5 mg/kg intravenously, its mean half-life (t1/2) was found to be 8.14 +/- 5.34 h, mean clearance (Cl) 35.13 +/- 9.62 ml/(h kg), the mean value of the volume of distribution (Vc) 0.08 +/- 0.01 l/kg and the mean steady state volume of distribution (Vss) 0.38 +/- 0.31 l/kg respectively. With the exception of a transitional increase in serum alkaline phosphatase activity, no other clinical abnormalities were observed. The t1/2 in dogs with naturally occurring tumours was longer than that in humans, but similar to that in rats. The values of Cl and Vss in dogs having naturally occurring neoplasms were lower than those in humans. It is suggested that the pharmacokinetics of BPD-MA in tumour-bearing dogs would be helpful in determining the protocol of a short drug-light interval PDT with BPD-MA that mainly targets the tumour vasculature.  相似文献   

Pro-apoptotic effects of tepoxalin, a cyclooxygenase/lipoxygenase dual inhibitor, on canine synovial fibroblasts     

Sunaga T  Oh N  Hosoya K  Takagi S  Okumura M 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2012,74(6):745-750

Canine osteoarthritis occurs frequently and causes secondary synovitis. Administration of nonsteroidal anti-inflammatory drugs (NSAIDs) is one of the major therapeutic options for pain management of joint diseases. Tepoxalin has an unique property as an NSAIDs that suppresses both cyclooxygenase and lipoxygenase. The purpose of this study was to evaluate antiproliferative effects of tepoxalin on cultured canine synovial cells. Cytotoxic effects of tepoxalin, carprofen, meloxicam and AA-861 on cultured canine synoviocytes were evaluated by MTT colorimetric assay. Apoptosis was detected by morphological observations with Giemsa or annexin V/Hoechst 33342 staining and by the inhibition of caspase-3 activity with N-Ac-Asp-Glu-Val-Asp-CHO (Ac-DEVD-CHO). Cytotoxic effects of tepoxalin were evident in comparison with the effects of carprofen or meloxicam. The same tendency of cytotoxicity was observed when 5-lipoxygenase was inhibited by AA-861. The morphological findings and contradictory effects of Ac-DEVD-CHO with regard to the cytotoxicity proved the proapoptotic effects of tepoxalin. In conclusion, tepoxalin might control osteoarthritic synovitis by inducing apoptosis in proliferating synoviocytes, while most NSAIDs that selectively inhibit cyclooxygenase-2 most likely would not suppress synovial proliferation.  相似文献