Manoalide derivatives from a marine sponge Luffariella sp. collected in Palau     

Michio  NAMIKOSHI  Shigeo  SUZUKI  Shiori  MEGURO  Hiroshi  NAGAI  Yoshio  KOIKE  Akira  KITAZAWA  Hisayoshi  KOBAYASHI  Taiko  ODA  Junko  YAMADA 《Fisheries Science》2004,70(1):152-158

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A note on the genetic diversity of the vulnerable aquatic macrophyte Sparganium erectum and its congeners (Sparganiaceae) in rural wetland in Japan     

TEMPEI ISHII  YUICHIRO NAKAYAMA  MIKIO KOBAYASHI  HIROFUMI YAMAGUCHI 《Weed Biology and Management》2004,4(4):230-234

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Chronic low-dose exposure to imidacloprid potentiates high fat diet-mediated liver steatosis in C57BL/6J male mice     

Collins NIMAKO  Yoshinori IKENAKA  Yuko OKAMATSU-OGURA  Jussiaea V. BARIUAN  Atsushi KOBAYASHI  Ryo YAMAZAKI  Kumiko TAIRA  Nobuhiko HOSHI  Tetsushi HIRANO  Shouta M. M. NAKAYAMA  Mayumi ISHIZUKA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(3):487

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Development of the Cardiac Conducting System in the Chick Embryo     

Yon  Kim Mikio  Yasuda 《Anatomia, histologia, embryologia》1980,9(1):7-20

Chick embryos at 3 to 15 days of incubation were examined for the developmet and differentiation of the "four rings" of the heart. It was clarified that nodes and bundles of the impulse conducting system in the adult chicken were derived from these rings. This finding was very important for understanding the cardiac conducting system in birds and mammals.  相似文献   

Synthesis and insecticidal activity of benzoheterocyclic analogues of N'-benzoyl-N-(tert-butyl)benzohydrazide: Part 3. Modification of N-tert-butylhydrazine moiety     

Sawada Y  Yanai T  Nakagawa H  Tsukamoto Y  Tamagawa Y  Yokoi S  Yanagi M  Toya T  Sugizaki H  Kato Y  Shirakura H  Watanabe T  Yajima Y  Kodama S  Masui A 《Pest management science》2003,59(1):49-57

Nineteen analogues were synthesized by modifying the tert-butylhydrazine moieties of N'-tert-butyl-N'-(3,5-dimethylbenzoyl)-5-methyl-2,3-dihydro-1,4-benzodioxine-6-carbohydrazide and N'-tert-butyl-N'-(3,5-dimethylbenzoyl)-5-methylchromane-6-carbohydrazide (chromafenozide), and the synthesized analogues were evaluated for their insecticidal activity against Spodoptera litura F. While all of the synthesized analogues had insecticidal activity inferior to those of the lead compounds, several of the analogues nonetheless showed high insecticidal activity. Chromafenozide has shown very high selectivity toward lepidopteran species.  相似文献   

Validation and application of real-time polymerase chain reaction assays for representative rumen bacteria     

Satoshi KOIKE  Hiroyoshi YABUKI  Yasuo KOBAYASHI 《Animal Science Journal》2007,78(2):135-141

Real‐time polymerase chain reaction (PCR) assays for 11 representative rumen bacterial species were validated. The sensitivity was tested by using the serially diluted target 16S rDNA from respective bacterial species. The recovery of the target DNA and the assay reproducibility were determined using DNA from rumen fluid spiked with different quantities of the target. Minimum detection levels for the target were 10–100 copies in pure culture. The recovery of the added target ranged from 82.4 to 116.6%. The intra‐ and inter‐assay variations of each assay were <9.4 and <12.6%, respectively. Therefore, the real‐time PCR assays evaluated in the present study are considered to be sufficiently reliable for monitoring all 11 bacterial species in the rumen. The assays were then applied to the monitoring of the bacterial species attached to ruminally incubated rice straw. Among the monitored fibrolytic species, Fibrobacter succinogenes was found to be the most dominant, accounting for 2.61% of total bacteria after 24 h incubation. Selenomonas ruminantium and Streptococcus bovis, non‐fibrolytics, were detected on the rice straw at 8.96% and 1.16% of total bacteria, respectively. Such high levels of non‐fibrolytics on the plant fiber suggest a synergistic relationship between fibrolytics and non‐fibrolytics.  相似文献   

Optimal application timing of simeconazole granules for control of rice kernel smut and false smut   总被引：1，自引：0，他引：1  

Mikio Tsuda  Masashi Sasahara  Toshiaki Ohara  Shigehiro Kato 《Journal of General Plant Pathology》2006,72(5):301-304

We investigated the optimal timing of simeconazole (RS-2-(4-fluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-3-trimethylsilylpropan-2-ol) application for controlling rice kernel smut in field trials in Miyagi Prefecture, Japan, using formulations of simeconazole (1.5% granules). The field tests revealed that a submerged application of simeconazole granules (450–600 g ai/ha) at 1–5 weeks before heading was highly effective against kernel smut, with treatments 1–2 weeks before heading being the most effective. Submerged application of the fungicide at 2–5 weeks before heading was also highly effective against false smut, with treatment 3 weeks before heading being the most effective. These periods overlap the timing for optimal application of simeconazole to control rice sheath blight and ear blight. Consequently, we concluded that treatment with simeconazole 2–3 weeks before heading can be a useful tool for controlling all four diseases.  相似文献   

Soybean sowing date effects on weed communities in untilled and tilled fields in north-eastern Japan     

HIROYUKI KOBAYASHI  ATSUSHI OYANAGI 《Weed Biology and Management》2006,6(3):177-181

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Adrenocorticotropic hormone-induced secretion of cortisol in goats is inhibited by androgen     

Yuko MAEJIMA  Masato AOYAMA  Noriko KOBAYASHI  Shoei SUGITA 《Animal Science Journal》2006,77(1):87-94

In a previous study, it was found that there are sex differences in goats with respect to the levels of cortisol secretion induced by transportation stress. We also found that treatment of castrated male goats with dihydrotestosterone (DHT) suppressed the increase in plasma cortisol concentration following transportation, but did not suppress the secretion of adrenocorticotropic hormone (ACTH). This suggests that androgen might block ACTH ‐ induced cortisol secretion. In order to examine this hypothesis, the effects of androgen on ACTH‐induced cortisol secretion in goats were investigated. First, castrated male goats were treated with testosterone (T), DHT or cholesterol (cho) for 21–25 days. Cho was used as a control for T and DHT treatment. Then, plasma cortisol concentrations were compared among the hormonal treatments after ACTH injection. Subsequently, the distribution of androgen receptors in the caprine adrenal gland was investigated. There were no differences in the basal cortisol concentrations among the hormonal treatments. However, plasma cortisol concentrations after ACTH injection were significantly lower in T ‐ and DHT ‐ treated goats than in cho ‐ treated goats. Androgen receptors were present in 60% of the cells in the zonae fasciculata and reticularis of the adrenal cortex, the regions that secrete glucocorticoids. These results suggest that androgen may act directly on the adrenal cortex to suppress cortisol secretion induced by ACTH.  相似文献   

Combined effects of clenbuterol and various concentrations of protein on performance of broiler chickens     

Y. HAMANO  K. KUME  S. YAMAZAKI  S. KOBAYASHI  Y. TERASHIMA 《British poultry science》1998,39(1):117-122

1. The effects of the beta-adrenergic agonist, clenbuterol (1 mg/kg diet) on the growth and muscle composition in female broiler chickens (14 to 32 d of age) fed on diets containing various concentrations of protein (220, 240 or 260 g protein/kg) were examined. 2. Body weight gain over the 18 d period increased linearly with increasing protein intake. The rate of gain was significantly higher in clenbuterol-treated chickens than in control birds. 3. Dietary clenbuterol increased thigh muscle weight and protein concentration of breast and thigh muscle, regardless of dietary protein content. Protein/DNA ratio in thigh muscle was enhanced by clenbuterol feeding, and the magnitude of difference of the ratio was higher in chickens fed on the 240 and 260 g CP/kg diets than in those fed the 220 g CP/kg diet. 4. It was concluded that clenbuterol-treated chickens require increased dietary protein to maintain maximal growth, and that increased protein consumption is an important factor in improving growth in clenbuterolfed broilers.  相似文献