Wood structure of <Emphasis Type="Italic">Populus alba</Emphasis> formed in a shortened annual cycle system     

Kei’ichi Baba  Yuko Kurita  Tetsuro Mimura 《Journal of Wood Science》2018,64(1):1-5

Wood formation of trees that grow along the seasons has an annual rhythm. Due to this rhythm, physiological research on the mechanism of wood formation has been difficult to conduct in a typical experimental room. In the present study, we observed the wood tissue formation in a shortened annual cycle system, which was developed for poplar trees grown in a growth chamber with dormant and non-dormant cycles. Poplar trees were grown in this system by repeating the cycle three times. The resulting wood tissue consisted of three growth rings and very similar structures were observed around the ring boundary of the wood in a field-grown stem. This result suggests that the shortened annual cycle system can be adopted as a model for physiological, cell biological and molecular research of wood and annual ring formation.  相似文献   

Expression of podoplanin in various types of feline tumor tissues     

Satoshi KAMOTO  Masahiro SHINADA  Daiki KATO  Masaya TSUBOI  Sho YOSHIMOTO  Ryohei YOSHITAKE  Shotaro ETO  Namiko IKEDA  Yosuke TAKAHASHI  Yuko HASHIMOTO  James CHAMBERS  Kazuyuki UCHIDA  Shinji YAMADA  Mika K. KANEKO  Ryohei NISHIMURA  Yukinari KATO  Takayuki NAKAGAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1795

Podoplanin is expressed in various human tumors where it promotes tumor progression, epithelial-mesenchymal transition, and distant metastasis. Podoplanin is also expressed in cancer-associated fibroblasts and induces tumor malignancy. The objective of this study was to evaluate podoplanin expression in various types of feline tumor tissues. Immunohistochemical analysis revealed that podoplanin was expressed in cells of 13/15 (87%) squamous cell carcinomas and 5/19 (26%) fibrosarcomas. Moreover, cancer-associated fibroblasts expressed podoplanin in most tumor types, including 18/21 (86%) mammary adenocarcinoma tissues. Our findings demonstrate that various types of feline tumor tissues expressed podoplanin, indicating the importance of the comparative aspects of podoplanin expression, which may be used as a novel research model for podoplanin biology.  相似文献   

Seroprevalence of antibodies against severe acute respiratory coronavirus 2 (SARS-CoV-2) in household dogs in Japan     

Genta ITO  Yuko GOTO-KOSHINO  Yudai KURODA  Park EUNSIL  Ken MAEDA  Takehisa SOMA  Yasuyuki MOMOI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1722

We investigated the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among dogs in the Tokyo area via enzyme-linked immunosorbent assay (ELISA) using the spike protein as the target antigen. Plasma samples from 494 household dogs and blood-donor dogs were tested from July 2020 to January 2021. Of these samples, three showed optical densities that were higher than the mean plus two standard deviations of the mean of the negative-control optical densities (ODs). Of these three samples, only the sample with the highest OD by ELISA was confirmed positive by virus neutralization testing. The positive dog presented no SARS-CoV-2-related symptoms. The positivity rate of SARS-CoV-2 infections among dogs in the Tokyo area was approximately 0.2%.  相似文献   

Prevalence of honeybee viruses in Apis mellifera in Gifu prefecture of Japan     

Yuko KITAMURA  Justice Opare ODOI  Makoto NAGAI  Tetsuo ASAI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(12):1948

Viral infection damages honeybee colony health. Viruses can be carried by queen bees and apicultural production materials when imported from foreign countries. We investigated seven honeybee viruses in worker bees (Apis mellifera) from 26 healthy apiaries in Gifu, Japan between 2018 and 2019. Black queen cell virus (BQCV) was detected in 23 (88.5%) of the apiaries, followed by Israeli acute paralysis virus (42.3%), deformed wing virus (DWV) (38.5%), and sacbrood virus (3.8%). In phylogenetic analysis, BQCV and DWV in Gifu were related to those in China and South Korea. Additionally, a high prevalence of BQCV was observed among worker bees in BQCV-positive colonies. Therefore, BQCV horizontal transmission among worker bees may contribute to the high prevalence of BQCV in Gifu.  相似文献   

Chemically induced expression of rice OSB2 under the control of the OsPR1.1 promoter confers increased anthocyanin accumulation in transgenic rice     

Kawahigashi H  Hirose S  Iwai T  Ohashi Y  Sakamoto W  Maekawa M  Ohkawa Y 《Journal of agricultural and food chemistry》2007,55(4):1241-1247

  相似文献   

Effect of dietary taurine levels on growth and feeding behavior of juvenile Japanese flounder Paralichthys olivaceus     

Shin-Kwon Kim  Toshio Takeuchi  Masahito Yokoyama  Yuko Murata  Masaki Kaneniwa  Yoshitaka Sakakura 《Aquaculture (Amsterdam, Netherlands)》2005,250(3-4):765-774

This study was conducted to investigate the effect of dietary taurine levels on growth and feeding behavior of juvenile Japanese flounder. Three different taurine level diets were prepared by supplementation of taurine (T-0%, 0.5% and 1.5%) to the basal diet. Fish meal washed with 70% ethanol to remove taurine was used as the sole protein source. Feeding experiments were carried out twice at 20 °C by using different size of fish (average body weight: 0.3 g in Experiment I and 3.7 g in Experiment II). The feeding behavior of fish was observed throughout the experimental period. At the end of experiments, fish were killed for amino acids analysis.

The final average body weight and feed efficiency of juvenile Japanese flounder fed the T-1.5% diet was significantly higher than those of fish fed the T-0% diet in Experiments I and II. Abnormal feeding behavior such as multiple feeding while swimming in the water column was observed in the T-0% group in Experiment I. These findings indicate that taurine is essential for normal growth and development of normal feeding behavior of juvenile Japanese flounder.  相似文献   

红色荧光蛋白(RFP)基因在转基因青鳉中的表达   总被引：1，自引：0，他引：1  

龙华  尾里建二郎  若松佑子  松岛良次 《中国水产科学》2002,9(2)

  相似文献   

Investigation of erythrocyte antigen frequencies in draft horse populations in Japan to assess blood donor suitability     

Hironaga KAKOI  Mio KIKUCHI  Taichiro ISHIGE  Shun-ichi NAGATA  Yuko HIROSAWA  Shoko TANAKA  Takumi KISHINAMI 《Journal of Equine Science》2021,32(1):17

  相似文献