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Nakai, Y.,Kimura, K.,Sato, M.,Inamoto, T.,Ogimoto, K. Asian Australasian Association of Animal Productio 1994 Animal Bioscience Vol.7 No.4
A total of 526 domestic and experimental animals in Miyagi prefecture, Japan were investigated for fecal carriage of Campylobacter jejuni and Campylobacter coli. C. jejuni was detected in chickens (8.2%), dogs (6.3%), pigs (4.3%), cattle (1.8%) and hamsters (1.4%). C. coli was only detected from pigs (20.7%). Drug susceptibility test was performed on 5 strains of C. jejuni isolated from chickens and 13 strains of C. coli isolated from pigs to tylosin (TS), thianphenicol (TP), carbadox (CDX), chroltetracyclin (CTC), vancomycin (VCM), cefoperazone (CPZ), latamoxef (LMOX), GM were highly effective and CTC, CP and PL were moderately effective against both C. jejuni and C. coli. TS and TPH were moderately effective against C. jejuni; however, they were less effective to C. coli. One strain of C. jejuni against CTC considered to be drug resistant. The results suggest that C. jejuni and C. coli can be controlled by several drugs effectively, although a drug resistant strain exists.
Performance-based Wind-resistant Design for High-rise Structures in Japan
Nakai, Masayoshi,Hirakawa, Kiyoaki,Yamanaka, Masayuki,Okuda, Hirofumi,Konishi, Atsuo Council on Tall Building and Urban Habitat Korea 2013 International journal of high-rise buildings Vol.2 No.3
This paper introduces the current status of high-rise building design in Japan, with reference to some recent projects. Firstly, the design approval system and procedures for high-rise buildings and structures in Japan are introduced. Then, performance-based wind-resistant design of a 300 m-high building, Abeno Harukas, is introduced, where building configuration, superstructure systems and various damping devices are sophisticatedly integrated to ensure a higher level of safety and comfort against wind actions. Next, design of a 213 m-high building is introduced with special attention to habitability against the wind-induced horizontal motion. Finally, performance-based wind-resistant design of a 634 m-high tower, Tokyo Sky Tree, is introduced. For this structure, the core column system was adopted to satisfy the strict design requirements due to the severest level of seismic excitations and wind actions.
Nakai, Y.,Ogimoto, K.,Kuwano, A.,Nakamura, K.,Kato, M. Asian Australasian Association of Animal Productio 1991 Animal Bioscience Vol.4 No.1
A mixed infection of Haemophilus paragallinarum (Hpg), Mycoplasma gallisepticum (MG) and M. synoviae (Ms) was detected in layers of a poultry farm in Iwate prefecture in Japan by pathological, serological and bacteriological investigation. Hpg strains were isolated from three of five birds investigated and all strains were identified to be type C. The Hpg isolates were more susceptible in vitro to a combination of sulfamonomethoxine and ormetoprim (Ektecin) than each of sulfamethoxasol, sulfamonomethoxine, oxytetracycline, tetracycline, streptomycin, erythromycin and thianphinicol. After a total of six days' medication of 1% feed additive Ektecin, symptoms of infectious coryza of hens in the farm almost disappeared and no Hpg was detected even from birds showing nasal discharge.
Nakai, Naoya,Kawano, Fuminori,Oke, Yoshihiko,Nomura, Sachiko,Ohira, Takashi,Fujita, Ryo,Ohira, Yoshinobu Korean Society for Molecular and Cellular Biology 2010 Molecules and cells Vol.30 No.6
It has been proposed that mechanically induced tension is the critical factor in the induction of muscle hypertrophy. However, the molecular mechanisms involved in this process are still under investigation. In the present study, the effect of mechanical stretch on intracellular signaling for protein translation initiation and elongation was studied in C2C12 myoblasts. Cells were grown on a silicone elastomer chamber and subjected to 30-min of 5 or 15% constant static or cyclic (60 cycles/min) uniaxial stretch. Western blot analyses revealed that p70 S6 kinase (p70S6K) and eukaryotic elongation factor 2 (eEF2), which are the markers for translation initiation and peptide chain elongation, respectively, were activated by both static and cyclic stretch. The magnitude of activation was greater in response to the 15% cyclic stretch. Cyclic stretch also increased the phosphorylation of MAP kinases (p38 MAPK, ERK1/2 and JNK). However, the pharmacological inhibition of MAP kinases did not block the stretch-induced activation of p70S6K and eEF2. An inhibitor of the mammalian target of rapamycin (mTOR) blocked the stretch-induced phosphorylation of p70S6K but did not affect the eEF2 activation. A broad-range tyrosine kinase inhibitor, genistein, blocked the stretch-induced activation of p70S6K and eEF2, whereas Src tyrosine kinase and Janus kinase (JAK) inhibitors did not. These results suggest that the stretch-induced activation of protein translation initiation and elongation in mouse myoblast cell lines is mediated by tyrosine kinase(s), except for Src kinase or JAK.
THE COMBINATION EFFECT OF SULFAMETHOXAZOLE AND TRIMETHOPRIM AGAINST ANIMAL INTESTINAL BACTERIA
Nakai, Y.,Matsumoto, H.,Ogimoto, K. Asian Australasian Association of Animal Productio 1991 Animal Bioscience Vol.4 No.3
Combination effects of sulfamethoxazole (SMX) and trimethoprim (TMP) against nine gram positive bacterial strains and 43 gram negative bacterial strains which included 40 strains of animal intestinal bacteria were studied in vitro. Minimum inhibitory concentrations (MICs) of SMX and TMP alone and 20:1 (SMX : TMP) mixture (ST) were investigated by the method recommended by Ad Hoc Committee of the Japan Society of Chemotherapy for the Evaluation of Sensitivity Testing Methods for Sulfamethoxazole and Trimethoprim. MICs of ST were more potentiated than those of SMX alone in 8 of 9 gram positive strains and 40 of 43 gram negative strains. Especially, 38 strains of 40 intestinal bacteria showed significant susceptibility to ST as compared to SMX. These results suggest a strong synergistic activity of ST mixture against animal intestinal bacteria, The activity was considered to be comparable to those of other current antibiotics.
Relationship between Indoor and Outdoor Particulate Matter Concentrations in Japan
Nakai, Satoshi,Tamura, Kenji Korean Society for Atmospheric Environment 2008 Asian Journal of Atmospheric Environment (AJAE) Vol.2 No.1
We briefly show the results of indoor and personal $PM_{2.5}$ measurements in an epidemiologic study designed to evaluate the health risks of ambient $PM_{2.5}$ in Japan and the relationship between indoor and outdoor PM concentrations. The impact of indoor and outdoor PM pollution on health is described based on one morbidity study. The results of other studies on indoor $PM_{2.5}$ measurements are also described.
Performance-Based Seismic Design for High-Rise Buildings in Japan
Nakai, Masayoshi,Koshika, Norihide,Kawano, Kenichi,Hirakawa, Kiyoaki,Wada, Akira Council on Tall Building and Urban Habitat Korea 2012 International journal of high-rise buildings Vol.1 No.3
This paper introduces the outlines of review and approval processes, general criteria and usual practices taken in Japan for the seismic design of high-rise buildings. The structural calculations are based on time-history analyses followed by performance evaluations. This paper also introduces structural design of two high-rise buildings: one is a 100 m high reinforced concrete residential building, and the other is a 300 m high steel building for mixed use.
Parallel Multiple Electric Power Conversion System Constructed by Connecting Three Power Converters
Nakai, Mitsuki,Inaba, Hiromi,Kishine, Keiji,Ishikura, Keisuke Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.3
The electric power conversion system constructed by connecting two or more power converters in parallel is an advantageous method for making to large capacity and standardization. In this paper, the control method of cross current when three power converters are operated is examined, and it reexamined a preferable system construction method.