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51.
The growth, sex ratio with age, and age at sexual maturation were determined based on sectioned otoliths in 257 specimens
of the blackspot tuskfish Choerodon schoenleinii collected in waters off Ryukyu Island. Opaque rings observed by reflected light in the sectioned otoliths were found to form
once a year from January to July. The three growth parameters of the von Bertalanffy growth equation were L∞ = 68.1 (cm), k = 0.263, and t
0 = −0.023 (year). The age at which the sex ratio reached 50% by sexual transition was about 6.15 years, and the age at which
50% of females were sexually mature was approximately 2 years. The oldest specimen among the samples was 17 years old. 相似文献
52.
53.
Takayama I Kubo M Takenaka A Fujita K Sugiyama T Arai T Yoneda M Sato H Yanai T Kai C 《Comparative immunology, microbiology and infectious diseases》2009,32(6):539-549
Ten wild masked palm civets infected with canine distemper virus (CDV), captured in Japan from 2005 to 2007, were histopathologically and phylogenetically analyzed. Phylogenetic analysis based on the amino acid sequences of the H protein of two CDV isolates from masked palm civets revealed that the two isolates were classified into the clade of recent isolates in Japan. Histopathologically marked lesions of virus encephalitis were present in the brain, whereas gastrointestinal lesions were absent or at a mild degree. The distribution of the lesions resembles that of recent CDV cases in dogs. Therefore, recent CDV infections in masked palm civets could be caused by recently prevalent CDV in dogs. The possibility of the masked palm civet as a spreader of CDV among wildlife is also discussed. 相似文献
54.
Fukuma Yasufumi Yamane Akihiko Itoh Tomohiro Tsukamasa Yasuyuki Ando Masashi 《Fisheries Science》2012,78(2):451-461
Fish meat was brought to a supercooled state through slow cooling, and changes in the texture, histology, and protein composition
of the meat were investigated. The groups whose storage temperature were lowered by 1.0°C per day (the 1.0°C group) and 0.5°C
per day (the 0.5°C group) began to freeze in the vicinity of −3.5 and −5.0°C, respectively. The freezing point depended on
the fish species; the lowest freezing point was −8.5°C, for the red sea bream in the 1.0°C group. The breaking strength tended
to decrease more slowly in the 1.0°C group, but the collagen fibers collapsed more rapidly in the 1.0°C group. In SDS electrophoresis,
a slight change in the banding patterns was observed, but the relationship between this observation and changes in histology
and physical properties was unclear. This study shows that it is possible to produce a supercooled state in fish meat, and
demonstrates that supercooling is a potential new storage method that lowers the temperature without generating ice crystals. 相似文献
55.
56.
Thanh Duc Nguyen Keita Sakakibara Tomoya Imai Yoshinobu Tsujii Yohsei Kohdzuma Junji Sugiyama 《Journal of Wood Science》2018,64(3):294-300
In this article, the conservation of archaeological waterlogged wood (WW) of Afzelia sp. (medium degraded: Umax = 385%) was impregnated in vacuum with an aqueous solution of acrylic acid (AA), sodium acrylate monomer (AANa), crosslinking agent (MBA) and catalyst (V-501). The simultaneous in situ polymerization and crosslinking resulted in slightly crosslinked sodium polyacrylate (PAANa) in the wood structure. The results showed that untreated WW had only a very limited ability to re-swell to recover its original dimensions from a collapsed condition, while WW protected by crosslinked PAANa could almost fully recover its original shape and size even after several drying–rewetting cycles. From microscopic observations, treated wood was found to maintain its original cell structure, form and shape even after repeated drying–rewetting cycles. PAANa was observed to be densely localized near the middle lamella, the cell corners, and the cell lumina by transmission electron microscopy observation. These observations suggest that our PAANa treatment provides reasonable strength as well as favorable hydrophilicity to avoid hornification of the cell wall upon drying, thus providing unique shape recovery properties. 相似文献
57.
Toru Kondo Eiichi Chu Koji Kageyama Satoru Sugiyama 《Journal of General Plant Pathology》2013,79(5):370-373
Stem canker and severe wilt were observed on delphinium plants (Delphinium elatum) in Aomori Prefecture, Japan, in 2008. The fungus isolated from the diseased crown was identified as Fusarium oxysporum f. sp. delphinii on the basis of morphological characteristics, nucleotide sequences, and host range. The isolate induced similar stem canker and wilt symptoms in inoculated delphinium plants. We propose the name “stem canker and wilt” for the disease. 相似文献
58.
Sugiyama A Kimura H Ogawa S Yokota K Takeuchi T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(5):673-678
The purpose of this study was to evaluate the effects of polyphenols from seed shells of Japanese horse chestnut (JHP) on methotrexate (MTX)-induced intestinal injury in rats. MTX application caused intestinal morphological injury and increase in malondialdehyde (MDA) levels, decrease in levels of glutathione (GSH) and glutathione peroxidase (GSH-Px) activities in small intestine. However, oral administration of JHP ameliorated MTX-induced intestinal injury and inhibited the increase in MDA and the decrease in GSH and GSH-Px activity in small intestine. In conclusion, our results indicated that oral administration of JHP alleviated MTX-induced intestinal injury through its antioxidant properties. 相似文献
59.
Onda K Sugiyama M Niho K Sato R Arai S Kaneko K Ito S Muto M Suganuma T Wakao Y Wada Y 《The Canadian veterinary journal. La revue veterinaire canadienne》2011,52(6):667-669
This study investigated the long-term survival of a calf with cervical ectopia cordis that grew normally, became pregnant, and calved normally. The cow showed normal cardiac function and absence of peripheral circulation abnormalities. This paper documents antemortem characteristics of the affected cow. 相似文献
60.
Sano S Sugiyama K Ito T Katano Y Ishihata A 《Journal of agricultural and food chemistry》2011,59(11):6209-6213
Piceatannol is present in passion fruit (Passiflora edulis) seeds in high amounts. In this study, we isolated the second major polyphenolic compound of passion fruit seeds and identified it as scirpusin B, which is a dimer of piceatannol. We investigated the antioxidant activities and vasorelaxing effects of these polyphenols. Their antioxidant effects were measured using an in vitro 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay, and their vasorelaxant effects were determined ex vivo in rat thoracic aorta. Both polyphenolic compounds exhibited potent antioxidant activities and significant vasorelaxant effects in endothelium-intact aortas. More specifically, scirpusin B exerted a greater antioxidant activity and vasorelaxant effect compared with that of piceatannol. Additionally, the vasorelaxation effects of the compounds were induced via the NO derived from the endothelium. This study provides the possibility that polyphenols in passion fruit seeds are effective against cardiovascular diseases (CVDs). 相似文献