Molecular characterization of methane-oxidizing bacteria associated with rice straw decomposition in a rice field     

Zhong-Jun JIA  Atsuo SUGANO  Naoko ASARI  Cho Cho TUN  Rie ISHIHARA  Susumu ASAKAWA  Makoto KIMURA 《Soil Science and Plant Nutrition》2007,53(6):729-739

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Minocycline prevents primary duck neurons from duck Tembusu virus-induced death     

Sittinee KULPRASERTSRI  Keisuke AOSHIMA  Atsushi KOBAYASHI  Takashi KIMURA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(4):734

Duck Tembusu virus (DTMUV), a neurotropic flavivirus, is a causative agent of severe neurological diseases in different birds. No approved vaccines or antiviral therapeutic treatments are available to date. The poultry industry experiences significant economic losses due to DTMUV infections. Minocycline is a second-generation semi-synthetic tetracycline analogue that is commonly used as an antimicrobial treatment. Experimental studies have indicated the successful protective effects of minocycline against neuronal cell death from neurodegenerative diseases and viral encephalitis. The aim of this study was to investigate the effects of minocycline on DTMUV infection in neurons. Primary duck neurons were treated with minocycline, which exhibited neuroprotective effects via anti-apoptotic function rather than through viral replication inhibition. Minocycline might serve as a potential effective drug in DTMUV infection.  相似文献   

Economic effects of using sexed semen in Japanese dairy herds     

Osamu SASAKI  Hirohisa KIMURA  Kazuo ISHII  Masahiro SATOH  Yoshitaka NAGAMINE  Kunio YOKOUCHI 《Animal Science Journal》2011,82(3):486-493

Dairy farm agricultural income should increase when sexed semen is used instead of unsexed semen. This study simulated three scenarios: using unsexed semen (N), using X sperm of Holstein and unsexed semen of Japanese Black (H), and using X sperm of Holstein and Y sperm of Japanese Black (HJ). Two management scenarios were considered: conventional management (CONV); and the use of Japanese Black semen with surplus cows to produce F₁s where sufficient replacement female Holstein calves were obtained for maintenance (MAINT). In CONV, the agricultural incomes of H and HJ were 610 000–2 400 000 yen higher than that of N. The agricultural income increased when the difference in the prices between Holstein males and average F₁ male/female calves was 34 000–50 000 yen, that between Holstein male and female calves was 80 000–110 000 yen, and that between F₁ male and female calves was 50 000–90 000 yen. Therefore, the agricultural income can be increased by using sexed semen to select calves of a more valued breed and sex.  相似文献   

Elemental analysis of otoliths of walleye pollock: A trial to discriminate the local stocks around Hokkaido, Japan     

Ryo  KIMURA  Orio  YAMAMURA  Yoshioki  OOZEKI  Atsushi  TSUDA 《Fisheries Science》2003,69(6):1209-1217

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Thermal gelation of salted paste from scallop striated adductor muscle   总被引：1，自引：0，他引：1  

WAKAKO  YOSHIDA  OSAMU  KUNIMI  MICHIKO  FUJIURA  MEIKO  KIMURA  HISANORI  NOZAWA  NOBUO  SEKI 《Fisheries Science》2003,69(5):1017-1025

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基于3S的黄土高原北部土地沙化分析——以陕西省神木县为例     

白龙  刘利民  小林達明  松岗延浩  木村玲二 《草业科学》2010,27(12):32-38

采用实地调查和遥感数据分析相结合的方式,分析黄土高原北部神木县的土地沙化变化趋势及社会背景因素,为草地沙化的有效遏制提供依据。结果表明,神木县的土地沙化呈“整体缩小局部扩展”趋势。1986-2004年,沙化土地面积减少了10%（750 km2）。土地沙化在地区间有很大差异,县西北部乡镇里沙化土地减少明显,而南部的黄土峁地区沙化土地有所增加。与社会统计资料对比分析后发现,耕地面积比例大、人均土地面积少的乡镇地区,土地沙化趋势明显。以上结果意味着农田利用对黄土峁地区土地沙化有很大影响,传统耕作方式的改变有助于遏制土地沙化。  相似文献   

Morphology, host range and phylogenetic diversity of Sphingomonas phages in the floodwater of a Japanese paddy field     

Natsuko NAKAYAMA  Takashi TSUGE  Susumu ASAKAWA  Makoto KIMURA 《Soil Science and Plant Nutrition》2009,55(1):53-64

Members of the Sphingomonas -related genera ( Sphingomonas , Sphingobium , Novosphingobium and Sphingopyxis ) are dominant in bacterial isolates from the floodwater of Japanese paddy fields. Fifty-eight Sphingomonas / Novosphingobium bacteriophages (phages) were isolated to elucidate their morphology, host range and phylogenetic diversity based on the capsid gene ( g23 ) sequence. All of the phages were siphoviruses with isometric or elongated, icosahedral capsids and a long, non-contractile tail. The genomes were double-stranded DNA measuring either 40, 60, 100 or 160 kb. The host range of the phages was examined by infecting 16 bacterial isolates from the floodwater, belonging to Sphingomonas , Novosphingobium , Sphingopyxis and Porphyrobacter . The host range was widely different and varied between infection of only the host used for isolation and infection of hosts belonging to the three genera of Sphingomonas , Novosphingobium and Porphyrobacter . All phages had g23 , indicating the ubiquity of the g23 gene among Myoviridae and Siphoviridae members. Every g23 sequence of the phages belonged to one of the six uncharacterized Paddy Groups proposed by Fujii et al . (2008 ). The g23 sequences were identical at the nucleotide level for several phages with isometric and elongated capsids with 60 and 160 kb genomes, and between some phages and the clones that were retrieved from distant paddy fields. This indicates the common occurrence of horizontal transfer of g23 in the paddy fields. The g23 sequence does not correlate with the host range of those phages. In addition, a larger degree of divergence of g23 from coliphage T4 in paddy fields compared to marine environments was estimated from the present study.  相似文献   

Ecology of viruses in soils: Past, present and future perspectives   总被引：3，自引：0，他引：3  

Makoto KIMURA  Zhong-Jun JIA  Natsuko NAKAYAMA  Susumu ASAKAWA 《Soil Science and Plant Nutrition》2008,54(1):1-32

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Oat Retrotransposon OARE-1 Is Activated in Both Compatible and Incompatible Interactions with Pathogenic Fungi     

Yosuke KIMURA  Yukio TOSA  Shigeyuki BETSUYAKU  Yukio SASABE  Reiko TOMITA  Jiro MURAKAMI  Hitoshi NAKAYASHIKI  Shigeyuki MAYAMA 《Journal of General Plant Pathology》2002,68(1):8-14

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Cranial morphological homogeneity in two subspecies of water deer in China and Korea     

Yung Kun KIM  Daisuke KOYABU  Hang LEE  Junpei KIMURA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1427-1435

The water deer (Hydropotes inermis) has conventionally been classified into two subspecies according to geographic distribution and pelage color pattern: H. i. inermis from China and H. i. argyropus from Korea. However, the results of a recent molecular study have called this into question. To further reappraise this classification, we examined morphological variation in craniodental measurements of these 2 subspecies. Results of univariate and multivariate analyses demonstrated that these 2 subspecies are not well-differentiated, suggesting that individuals of the 2 populations share common morphological traits. Despite the distribution of the subspecies at different latitudes, no clear morphocline was detected, suggesting that Bergmann’s rule does not apply in this case. Discriminant analysis indicated that the characteristics of individuals are shared by both populations, suggesting that not all individuals can be assigned to their original population. Results of principal component analysis showed that the two populations shared more than 75% of individuals, congruent with the “75% rule” of subspecies classification. In both the neighbor-joining and unweighted pair group methods with arithmetic mean cluster analyses, specimens of H. i. argyropus and H. i. inermis were highly mixed within the cladograms. These results suggest that the overall morphological variation in the 2 subspecies overlaps considerably and that there is no coherent craniofacial difference between the 2 groups. The present findings combined with prior observations from molecular biogeography point out that the taxonomic division of water deer into 2 subspecies should be revisited.  相似文献