Flood damage assessment on rice crop in the Stung Sen River Basin of Cambodia     

Chung  Sarit  Takeuchi  Junichiro  Fujihara  Masayuki  Oeurng  Chantha 《Paddy and Water Environment》2019,17(2):255-263

Paddy and Water Environment - In Cambodia, rice production is important for the majority of rural populations as the main source of income. However, historical extreme flood events, especially the...  相似文献   

Effects of drying on the release of solutes from acid sulfate soils distributed in the Mekong Delta, Vietnam     

Masayuki KAWAHIGASHI  Nhut Minh DO  Ve Bao NGUYEN  Hiroaki SUMIDA 《Soil Science and Plant Nutrition》2008,54(4):495-506

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Hypereosinophilic syndrome in two cats     

Takeuchi Y  Matsuura S  Fujino Y  Nakajima M  Takahashi M  Nakashima K  Sakai Y  Uetsuka K  Ohno K  Nakayama H  Tsujimoto H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(10):1085-1089

Two cats showing chronic vomiting, diarrhea and weight loss were found to have leukocytosis with marked eosinophilia. Both cats were diagnosed with hypereosinophilic syndrome by the findings of increased eosinophils and their precursors in the bone marrow, eosinophilic infiltration into multiple organs, and exclusion of other causes for eosinophilia. Although cytoreductive chemotherapy with hydroxycarbamide and prednisolone was performed, these two cats died 48 days and 91 days after the initial presentation.  相似文献   

Transcription of thymic stromal lymphopoietin via Toll‐like receptor 2 in canine keratinocytes: a possible association of Staphylococcus spp. in the deterioration of allergic inflammation in canine atopic dermatitis          下载免费PDF全文

Mayu Sakamoto  Ryota Asahina  Hiroaki Kamishina  Sadatoshi Maeda 《Veterinary dermatology》2016,27(3):184-e46

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Identification of a blue photoluminescent composite material from a combinatorial library     

J Wang  Y Yoo  C Gao  I Takeuchi  X Sun  H Chang  X Xiang  PG Schultz 《Science (New York, N.Y.)》1998,279(5357):1712-1714

A quaternary combinatorial masking strategy was used in conjunction with photolithography to generate compositionally diverse thin-film phosphor libraries containing 1024 different compositions on substrates 2.5 centimeters square. A parallel imaging system and scanning spectrophotometer were used to identify and characterize compositions in the library with interesting luminescent behavior. Optimal compositions were identified with the use of gradient libraries, in which the stoichiometry of a material was varied continuously. This process led to the identification of an efficient blue photoluminescent composite material, Gd3Ga5O12/SiO2. Experimental evidence suggests that luminescence in this material may arise from interfacial effects between SiO2 and Gd3Ga5O12.  相似文献   

Variation in Virulence of Plasmodiophora brassicae in Japan Tested with Clubroot-resistant Cultivars of Chinese Cabbage (Brassica rapa L. ssp. pekinensis)     

Yasuhisa Kuginuki  Hiroaki Yoshikawa  Masashi Hirai 《European journal of plant pathology / European Foundation for Plant Pathology》1999,105(4):327-332

The differential hosts of Williams (1966) and the European Clubroot Differential (ECD) (Buczacki et al., 1975) have been used commonly to identify populations of Plasmodiophora brassicae, which causes clubroot disease in Brassica crops. However, some of these hosts showed intermediate and fluctuating scores to most populations from Japan. Therefore, these hosts could not be used to provide a clear classification in Japan. We have tried to clarify the genetic diversity in pathogenicity of P. brassicae in Japan using Japanese clubroot-resistant (CR) F₁ hybrid (F₁) cultivars and lines of Brassica rapa. The responses of some CR F₁ cultivars were very clear. Four groups of field populations in Japan were recognized using the CR F₁ cultivars. The clear response obtained here may depend largely on the genetic purity of the F₁ cultivars. Moreover, it is possible to classify some of these Japanese populations into the same race using the Williams set and ECD 01 to ECD 05. The present differential hosts may be useful in the study of European populations of P. brassicae. The response of the differential hosts suggests that there are several major CR genes in B. rapa. It is suggested that pyramiding CR genes would be useful in breeding CR cultivars that can overcome the breakdown of the present CR cultivars of Chinese cabbage.  相似文献   

Juveniles of threadsail filefish, <Emphasis Type="Italic">Stephanolepis cirrhifer</Emphasis>, can survive and grow by feeding on moon jellyfish <Emphasis Type="Italic">Aurelia aurita</Emphasis>     

Y. Miyajima  R. Masuda  A. Kurihara  R. Kamata  Y. Yamashita  T. Takeuchi 《Fisheries Science》2011,77(1):41-48

We conducted feeding experiments on threadsail filefish Stephanolepis cirrhifer juveniles for 16 days to evaluate the efficacy of moon jellyfish Aurelia aurita as a prey item. Four treatments, each with 40 individuals, were prepared to compare fish growth performance. The treatments consisted of filefish that were starved (control) (S), fed only jellyfish (J), fed only krill (K), and fed both jellyfish and krill (JK). Fish in the S treatment exhibited a 50% mortality rate and reduced body weight, whereas the J treatment exhibited a zero mortality rate and increased body weight. Fish in the JK treatments showed a significantly faster growth than those in the K treatment. Filefish consumed as much as 24 and 13 times their own body weight in jellyfish per day in the J and JK treatments, respectively. This is the first report showing that growth can be sustained by feeding a marine fish only jellyfish, and indicates the potential of jellyfish as a fish prey in both nature and captivity.  相似文献   

Comparison of morphological and DNA-based techniques for stomach content analyses in juvenile chum salmon <Emphasis Type="Italic">Oncorhynchus keta</Emphasis>: a case study on diet richness of juvenile fishes     

Sakiko Orui Sakaguchi  Shigeru Shimamura  Yuichi Shimizu  Gen Ogawa  Yuichiro Yamada  Keiko Shimizu  Hiroaki Kasai  Hiroshi Kitazato  Yoshihiro Fujiwara  Katsunori Fujikura  Kiyotaka Takishita 《Fisheries Science》2017,83(1):47-56

To identify the stomach contents of marine organisms, morphological observations are commonly conducted. However, the results obtained by this traditional method are frequently biased, as it is difficult to detect partially digested, soft-bodied organisms. To resolve this, recent studies have used DNA-based (DNA barcoding) analyses to examine the diet breadth of marine organisms. Here, we compared the prey richness of juvenile fishes using morphological observations and DNA-based analyses, with a focus on juvenile chum salmon Oncorhynchus keta. A higher number of prey taxa were successfully identified using DNA-based analyses than morphological observations. However, we also noticed several shortcomings of the DNA-based analyses, as reported in other diet-analysis studies that used molecular techniques. For example, the degree of digestion among prey taxa might have resulted in differential sensitivity to DNA detection. Additionally, several prey taxa could not be precisely identified, as the sequence data for some of the targeted organismal groups are unavailable in public gene databases. Remarkably, it is also possible that DNA-based analyses detected secondary prey, and therefore, the richness of prey taxa was likely overestimated. Thus, dietary analyses of juvenile fishes need to be carefully conducted, considering the respective advantages and disadvantages of DNA-based and morphological techniques.  相似文献   

Correlation of changes in seasonal distribution and catch of red sea bream Pagrus major with winter temperature in the eastern Seto Inland Sea,Japan (1972–2010)     

Masayuki Yamamoto  Hiroaki Omi  Naotaka Yasue  Akihide Kasai 《Fisheries Oceanography》2020,29(1):1-9

Red sea bream Pagrus major is a commercially important fish in Japan. In eastern Seto Inland Sea (SIS), the catch has increased from 297 tons in 1972 to 2,039 tons in 2010. We examined the relationship, 1972–2010, between increase in catch and winter temperature, based on the catch in February and March and the lowest water temperature at 10 m depth. In 1972–1986, the lowest water temperatures in the inner SIS areas (Osaka Bay, Harima‐nada, and Bisan‐seto) were <8°C, which is physiologically unfavorable for red sea bream. However, in 1987–2010 temperatures were generally ≥8°C. In the inner areas, the catch during winter had been minimal until the early 1980s, presumably because most red sea breams moved to the Kuroshio‐influenced (warmer) Kii Channel area. However, the winter catch in the inner areas of SIS increased from the late 1980s with warm winters. In addition, the catch between April and June, the spawning season, increased in the inner areas from the 1990s, and the catch rate of the inner areas was more than twice higher in the 2000s than in the 1980s. The results suggest that expansion of the distribution area during winter due to warm winter and increase in egg production in the inner areas greatly contributes to the increasing in catch in the eastern SIS.  相似文献   

Amberjack <Emphasis Type="Italic">Seriola dumerili</Emphasis> interleukin-10 negatively suppresses host cell-mediated immunity     

Megumi Matsumoto  Mahumoud Tanekey Amer  Kyosuke Araki  Atsushi Nishitani  Kazuma Hayashi  Yutaka Takeuchi  Kazuhiro Shiozaki  Atsushi Yamamoto 《Fisheries Science》2018,84(5):857-867

Interleukin-10 (IL-10) is an anti-inflammatory cytokine and negatively regulates cell-mediated immunity (CMI) induction by inhibiting cytokine production in type 1 T helper cells. IL-10 genes have been isolated from several fish, and inflammatory cytokine inhibition by IL-10 has been well examined. However, a CMI regulator of IL-10 in fish has not yet been identified. In this study, we cloned the IL-10 gene in amberjack Seriola dumerili and analyzed its function using its recombinant protein (rIL-10). In an in vitro culture experiment, gene expression of inflammatory cytokines was suppressed in leukocytes incubated with rIL-10 compared with cells that only received Nocardia seriolae stimulation. This result suggests amberjack IL-10 has conserved function as an inflammatory cytokine inhibitor. Bactericidal activity of amberjack cells against intracellular pathogen stimulation was decreased in a rIL-10 dose-dependent manner. Furthermore, a significant reduction in the T-bet/GATA-3 ratio was observed in N. seriolae living cell (LC)?+?rIL-10-injected fish. Taken together, these results suggest amberjack rIL-10 suppresses CMI induction both in vitro and in vivo. In addition, the number of IgM⁺ cells among spleen leukocytes in N. seriolae?+?rIL-10-injected fish was higher than in only N. seriolae LC, suggesting that Th2-dominant immunity was induced by adding rIL-10.  相似文献