Expression of monocarboxylate transporter 1 in oral and ocular canine melanocytic tumors     

Shimoyama Y  Akihara Y  Kirat D  Iwano H  Hirayama K  Kagawa Y  Ohmachi T  Matsuda K  Okamoto M  Kadosawa T  Yokota H  Taniyama H 《Veterinary pathology》2007,44(4):449-457

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Irradiation history of Itokawa regolith material deduced from noble gases in the Hayabusa samples     

Nagao K  Okazaki R  Nakamura T  Miura YN  Osawa T  Bajo K  Matsuda S  Ebihara M  Ireland TR  Kitajima F  Naraoka H  Noguchi T  Tsuchiyama A  Yurimoto H  Zolensky ME  Uesugi M  Shirai K  Abe M  Yada T  Ishibashi Y  Fujimura A  Mukai T  Ueno M  Okada T  Yoshikawa M  Kawaguchi J 《Science (New York, N.Y.)》2011,333(6046):1128-1131

Noble gas isotopes were measured in three rocky grains from asteroid Itokawa to elucidate a history of irradiation from cosmic rays and solar wind on its surface. Large amounts of solar helium (He), neon (Ne), and argon (Ar) trapped in various depths in the grains were observed, which can be explained by multiple implantations of solar wind particles into the grains, combined with preferential He loss caused by frictional wear of space-weathered rims on the grains. Short residence time of less than 8 million years was implied for the grains by an estimate on cosmic-ray-produced (21)Ne. Our results suggest that Itokawa is continuously losing its surface materials into space at a rate of tens of centimeters per million years. The lifetime of Itokawa should be much shorter than the age of our solar system.  相似文献   

Clock mutation affects circadian regulation of circulating blood cells   总被引：1，自引：0，他引：1  

Katsutaka Oishi  Naoki Ohkura  Koji Kadota  Manami Kasamatsu  Kentaro Shibusawa  Juzo Matsuda  Kazuhiko Machida  Shuichi Horie  Norio Ishida 《Journal of circadian rhythms》2006,4(1):13-7

Background  

Although the number of circulating immune cells is subject to high-amplitude circadian rhythms, the underlying mechanisms are not fully understood.  相似文献   

Immunochemical and physical properties of peptic-digested ovomucoid     

T Matsuda  K Watanabe  R Nakamura 《Journal of agricultural and food chemistry》1983,31(5):942-946

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Comparative studies of the changes in enzymatic activities in hardy and less hardy cultivars of winter wheat in late fall and in winter under snow     

Shonosuke Sagisaka  Yusuke Matsuda  Tohru Okuda  Sachio Ozeki 《Soil Science and Plant Nutrition》2013,59(3):543-550

Abstract

The synthetic activity of protein and changes in the activity profiles of enzymes during cold acclimation were studied in leaves, stems, and crowns of a hardy winter wheat cultivar ( Triticum aestivum L. cv. Horoshirikomugi) and a less hardy winter wheat cultivar (Triticum aestivum L. cv. Norin 61). The results showed that one of the genetic differences between the two cuitivars is found in the activities of protein synthesis under low temperatures. The profiles of the changes in enzymatic activities showed that the adjustment of enzymatic activities was a tissue-specific event to accommodate environmental changes. The synthesis of the enzymes involved in a peroxide scavenging system such as hexokinase, glucose-6-phosphate dehydrogenase, dehydroascorbate reductase, ascorbate peroxidase, and so on started at the acclimation stage, while the phosphoglucose isomerase, which appears to be a maintenance-type enzyme in the wintering wheat, showed a small increase in the activity at later stages of acclimation period in their stems of both cuitivars. When the field was covered with snow, the catalase activity in the leaves started to decrease abruptly, while catalase activities in the stems and crowns did not exhibit appreciable changes during the life under snow. The life-cycle dependent changes in enzymatic activities appear to occur in late March or early April under snow.  相似文献   

Isolation of endophytic streptomycetes from above- and belowground organs of Quercus serrata     

W. Thongsandee  Yosuke Matsuda  M. Shimizu  H. Ehara  S. Ito 《Journal of Forest Research》2013,18(2):179-189

The occurrence and localization of endophytic actinomycetes within diverse organs of host plants provide ecological information that can be used to evaluate the significance of their spatial habitats. The aim of this study was to isolate and characterize endophytic actinomycetes in different organs of Quercus serrata. For this purpose, actinomycete isolates were obtained from surface-sterilized tissues of both symptomless seedlings and aged trees of Q. serrata and rhizosphere soil of the sampled seedlings. Thirty-five isolates with the ability to sporulate, including 4 from leaves of the aged trees, 10, 6, and 15 from leaves, stems, and roots of the seedlings, respectively, and 8 soil-derived isolates, were selected and characterized. The 16S rDNA nucleotide sequence analyses revealed that all of them belonged to the genus Streptomyces. According to a neighbor-joining phylogenetic tree constructed based on the results, the isolates of plant origin were divided into three major clades with high bootstrap values of 98 or 99 %, whereas eight soil-derived isolates were located at different positions from those of the endophyte isolates. Moreover, two larger clades were formed, one of which contained isolates derived only from aboveground parts, while the other contained isolates from all of the organs. These results suggest that the endophytic streptomycetes in Q. serrata may differ in their habitat positions (i.e., either above- or belowground parts).  相似文献   

Development of CAPS markers and their application in breeding for mango, Mangifera indica L.     

Ayano Shudo  Kazuhiko Tarora  Yuko Makishi  Ryotaro Ichi  Ken Takahashi  Masato Matsumura  Sayaka Shimabuku  Noboru Matsuda  Satoshi Nakasone  Naoya Urasaki 《Euphytica》2013,190(3):345-355

To develop cleaved amplified polymorphic sequence (CAPS) markers for the identification of true hybrids in F1 progeny, we cloned sucrose synthase (SS) and sucrose phosphate synthase (SPS) genes from 19 mango cultivars. Through comparison of amino acid sequences in a BLASTX search, cloned SS and SPS genes were found to be homologs of Citrus unshiu CitSUS1 (AB022092) and CitSPS1 (O22060), respectively. Therefore, we designated the SS and SPS genes as MiSUS1 and MiSPS1, respectively. There were 11 genotypes in MiSUS1 and 10 in MiSPS1 sequences. In the MiSUS1 nucleotide sequences, 46 SNPs and 5 in/dels were detected. Twenty-six out of the 46 SNPs mapped on the restriction enzyme recognition sites were successfully converted to 25 CAPS markers. In the MiSPS1 nucleotide sequences, 99 SNPs and 6 in/dels were detected. Thirty out of 99 SNPs and 2 out of 6 in/dels mapped on the recognition sites were also converted to 32 CAPS markers. By using two CAPS markers, SS-2798 and SPS-5745, we identified 37 true hybrids that had different genotypes to ‘Irwin’ from 82 F1 progeny obtained through a cross between ‘Irwin’, the maternal parent, and paternal parents by using flies as pollinators. The method developed here to identify true hybrids is a simple, rapid and highly reliable tool for efficient mango breeding.  相似文献   

Responses of Riverine Macroinvertebrates to Zinc in Natural Streams: Implications for the Japanese Water Quality Standard     

Yuichi Iwasaki  Takashi Kagaya  Ken-ichi Miyamoto  Hiroyuki Matsuda 《Water, air, and soil pollution》2012,223(1):145-158

We conducted a field survey in Japanese streams and rivers to generate useful information about whether the Japanese water quality standard for zinc (Zn) in the freshwater environment (30 μg/L) is over- or underprotective of the populations and communities of lotic benthic macroinvertebrates. Many macroinvertebrate populations were reduced and community characteristics were altered at two polluted sites with Zn concentrations above 1,000 μg/L as compared with control sites with Zn concentrations below 30 μg/L. In contrast, at least one site among three polluted sites with Zn concentrations of 80–126 μg/L experienced noncritical effects (i.e., no significant difference was observed between the sample mean at a polluted site and that at the control sites, and the sample mean was within the minimum–maximum range of those at the control sites) for most of the ten community metrics for diversity and abundance. In addition, the abundances of 95% of the dominant taxa were not always significantly lower at more than one polluted site (Zn concentrations, ≥80 μg/L). Our results suggest that Zn concentrations below approximately 100 μg/L are likely to protect most aspects of richness and abundance of the riverine macroinvertebrate communities in the study areas. This study shows a case that the Japanese Zn standard is likely overprotective of the macroinvertebrate populations and communities.  相似文献   

An econometric estimation of Japanese shrimp supply and demand during the 1990s     

Saowanee Traesupap  Yoshiaki Matsuda  Hidenori Shima 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3):215-221

Abstract

A simultaneous‐equation model of the supply and demand of shrimp in Japan is constructed, and sensitivity analyses are conducted to measure the effects of changing exchange rates and the stock holdings of shrimp. Using monthly statistics from January 1990 to December 1997, the Japanese own‐price elasticity of supply is found to be inelastic and has a less important effect than the beginning stocks factor. The Japanese demand for shrimp is also found to be price‐and income‐inelastic. The beginning of stock holdings is more sensitive to Japanese shrimp demand than the import price and income. The result of seasonality analyses shows that Japanese shrimp demand also depends on cultural factors.  相似文献   

Morphological and molecular genetics of ancient remains and modern rice (Oryza sativa) confirm diversity in ancient Japan     

Katsunori Tanaka  Nobuhiko Kamijo  Hiroaki Tabuchi  Kuniko Hanamori  Ryuji Matsuda  Junko Suginomori  Yo-Ichiro Sato  Tetsuro Udatsu  Ryuji Ishikawa 《Genetic Resources and Crop Evolution》2016,63(3):447-464

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