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31.
Yan?Tao Makito?Kobayashi Hideto?Fukushima Shugo?WatabeEmail author 《Fisheries Science》2005,71(1):195-204
ABSTRACT: Myosins were prepared from fast skeletal muscles of grass carp thermally acclimated to 10, 20 and 30°C in the laboratory as well as from those seasonally acclimatized and collected in January (winter) 2003 and May (spring), August (summer) and November (autumn) 2002. The maximal initial velocities ( V max ) of actin-activated Mg2+ -ATPase activity for myosins from the 10°C-acclimated and winter grass carp were 1.7–1.8-fold as high as those from the 30°C-acclimated and summer fish. The inactivation rate constant ( K D ) of Ca2+ -ATPase for myosin from the 10°C-acclimated grass carp was three to fourfold higher than those for myosins from the fish acclimated to 20°C and 30°C, whereas myosin from winter grass carp was about sevenfold as high as that for myosin from summer fish. Myosins from spring and autumn fish showed K D values comparable to those of the fish acclimated to 30°C and 10°C, respectively. In differential scanning calorimetry analysis, the transition temperature ( T m ) was observed near 38°C and 45–46°C with most myosins. However, the lowest T m at 32–33°C was given as one of the major endotherms in myosins from the 10°C-acclimated, autumn and winter fish. These responses of grass carp to changed environmental temperatures were almost similar to those for common carp reported previously. 相似文献
32.
Hiroyuki Ohta Kazuya OgiwaraEri Murakami Hiroshi TakahashiMasaru Sekiguchi Kiyokazu KoshidaTakashi Someya Wataru MorishimaJose D Rondal Rogelio N ConcepcionMasao Yoshida Makiko Watanabe 《Soil biology & biochemistry》2003,35(8):1155-1158
The diversity of bacterial populations developed in the surface layer (0-0.25 m depth) of volcanic mudflow deposits from the Mt. Pinatubo volcano (the Philippines) was investigated using quinone profiling. Samples were collected from sites (named N and S1) that had been hit repeatedly by mudflows during successive rainy seasons after the violent eruption of 1991 and also from sites (F1 and F3) covered by mudflow in 1991 but with no deposition in following years. The total microscopic count ranged from 108 g−1 (N and S1 sites) to 3.9×109 g−1(site F3). In the N sample only three quinone species were detected, while the quinone profiles of samples from sites S3 and F3 showed higher diversity. Tetrahydrogenated menaquinone with eight isoprenoid units [MK-8 (H4)] was the predominant quinone species in the sample from site N, while MK-8, MK-8 (H2), MK-8 (H4), MK-9 (H4) and MK-9 (H8) were found as major quinones in the sample from site F3. Because these MK species are known to be the major respiratory quinones of the Actinobacteria, this bacterial group is expected to predominate in the land with primary vegetation recovery following the impact of the volcanic mudflow. 相似文献
33.
Sobukawa H Watanabe M Kano R Ito T Onozaki M Hasegawa A Kamata H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(11):1527-1529
Bovine mastitis due to Prototheca zopfii leads to reduced milk production and is difficult to cure. Therefore, prevention is the best approach and this is best achieved through the use of effective disinfectants. The aim of this study was to evaluate the in vitro algaecide efficacy of conventional disinfectants against strains of P. zopfii genotype 1 and 2. The minimal algaecide concentration (MAC) of alkyldiaminoethylglycine hydrochloride, chlorhexidine, dioxide chlorine, povidone iodine and sodium hypochlorous acid against 10 isolates and the type strain (SAG2063(T)) of P. zopfii genotype 1 as well as 10 isolates and the type strain (SAG2021(T)) of P. zopfii genotype 2 were examined using the micro dilution method. This in vitro study indicated that alkyldiaminoethylglycine hydrochloride, chlorhexidine, povidone iodine and sodium hypochlorous acid, but not dioxide chlorine, are effective against both genotypes of P. zopfii. 相似文献
34.
ABSTRACT: The mechanisms by which catch yields of the manila clam Ruditapes philippinarum have decreased drastically in Kumamoto Prefecture, southern Japan, and the larval recruitment by which benthic populations of the clam are maintained were studied. Samples at different growth stages (planktonic larvae, new settlers, and small to large bivalves of the species) were collected from February 1997 to December 1998 on two tidal flats (Kawaguchi and Nameishi, 20 km distance from each other) along the eastern coast of Ariake Sound. Densities of planktonic larvae, new settlers and small bivalves were generally higher at Kawaguchi than Nameishi. The higher density of large bivalves at Kawaguchi depends on a high larval density. Larval retention mechanisms coupled with water movement at Kawaguchi, such as tidal residual currents, may be related intimately with the higher larval density at Kawaguchi. Predation by shore birds at and after recruitment may be related to the lower density of large bivalves recorded at Kawaguchi in 1998, despite larval densities being higher there. 相似文献
35.
Ayaka OKADA Satoko IZUME Kenji OHYA Hideto FUKUSHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(10):1293-1297
VP22 is a major tegument protein of Equine herpesvirus type 1 (EHV-1) that is a conserved
protein among alphaherpesviruses. However, the roles of VP22 differ among each virus, and
the roles of EHV-1 VP22 are still unclear. Here, we constructed an EHV-1 VP22 deletion
mutant and a revertant virus to clarify the role of VP22. We found that EHV-1 VP22 was
required for efficient viral growth in cultured cells, but not for virulence in a hamster
model. 相似文献
36.
Yoshihiro KOBAYASHI Tetsushi HIRANO Takuya OMOTEHARA Rie HASHIMOTO Yuria UMEMURA Hideto YUASA Natsumi MASUDA Naoto KUBOTA Kiichi MINAMI Shogo YANAI Mitsuko ISHIHARA-SUGANO Youhei MANTANI Toshifumi YOKOYAMA Hiroshi KITAGAWA Nobuhiko HOSHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1355-1361
37.
Shibata Saho Ono Tsuyoshi Kobayashi Yoshiko Miyagawa Itsuha Mukai Akitsugu Ichioka Youzou Takenaka Izumi Nakano Hideto Hirooka Yuuri 《Journal of General Plant Pathology》2021,87(5):322-325
Journal of General Plant Pathology - In June 2017, deer-horn-like galls covered with a whitish, powdery fungal layer were found on the trunks of Cinnamomum pseudopedunculatum (Lauraceae) in... 相似文献
38.
Sekiguchi Hiroyuki Masunaka Akira Nomiyama Koji Tomioka Keisuke 《Journal of General Plant Pathology》2021,87(5):326-329
Journal of General Plant Pathology - A postharvest rot of ripe sweet pepper fruits was found in Kagawa Prefecture in western Japan in October 2002. A fungus, isolated repeatedly from the diseased... 相似文献
39.
Shinsuke Koike Hideto Morimoto Yusuke Goto Chinatsu Kozakai Koji Yamazaki 《Journal of Forest Research》2008,13(4):215-222
Five members of the order Carnivora in the cool-temperate deciduous forests of Japan consume the fruits of trees, and they
are potential dispersers of the seeds of fleshy-fruited plants. We studied the frugivory of the Asiatic black bear, Japanese
marten, badger, red fox, and raccoon dog in cool-temperate deciduous forest of central Japan. From May 2003 to April 2005,
a total of 377 fecal samples of the five carnivores (bears, 91; martens, 158; badgers, 45; foxes, 36; and raccoon dogs, 47)
were sampled to determine the presence and frequency of occurrence of seeds. Seeds from 17 plant species, representing about
50% of the fleshy-fruited plants occurring in the study forest, were recovered from the carnivore fecal samples. Large numbers
(9–10,256) of seeds were present in those feces. Almost all the seeds of fleshy fruits retrieved from the fecal samples were
undamaged whereas no intact acorns or nuts were recovered. These findings suggest that all five carnivores can act as seed
dispersers for some fleshy-fruited plants in cool-temperate deciduous forest.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
40.
Paddy and Water Environment - In the A irrigation district in Yamagata Prefecture, Japan, a rehabilitation project is being implemented due to the aging of the irrigation facilities;... 相似文献