Effects of Shengmai San on oxidative damage in mentally stressed mice     

GONG Mu-xin  WANG Lei  WANG Qian  LI Yu-juan  KONISHI Tetsuya 《园艺学报》2007,23(6):1216-1218

AIM: To investigate the preventive effects of Shengmai San (SMS) on oxidative damage in mentally stressed mice.METHODS: An oxidative stress mouse model was established by moustache-removed. Protein carbonyl and thiobarbituric acid reactive substance (TBARS) formation were determined as the oxidative stress markers.RESULTS: (1)Moustache-cut was founded to significantly enhance the behavioral movements of mice, especially large movements (movement 2 and rearing). SMS pre-administration inhibited the accelerated movements. (2) Protein carbonyl was increased in brain, heart, liver and kidney. TBARS in liver and heart increased in the moustache-cut mice, but SMS pretreatment inhibited the increased protein carbonyl and TBARS.CONCLUSION: SMS has the preventive effects on oxidative damage induced by emotional stress.  相似文献   

Spatial distribution and feeding habits of the shrimp Crangon uritai as a predator on larval and juvenile marbled sole Pleuronectes yokohamae     

Mitsuhiro  NAKAYA  Tetsuya  TAKATSU  Masayasu  NAKAGAMI  Mikimasa  JOH  Toyomi  TAKAHASHI 《Fisheries Science》2004,70(3):445-455

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Poxvirus infection in Nile crocodiles (Crocodylus niloticus)   总被引：1，自引：0，他引：1  

G S Pandey  N Inoue  K Ohshima  K Okada  Y Chihaya  Y Fujimoto 《Research in veterinary science》1990,49(2):171-176

An outbreak was encountered of numerous yellowish cutaneous nodules in one- to two-year-old farmed Nile crocodiles (Crocodylus niloticus) in Kasaba Bay Crocodile Farm at Lake Tanganyika in Zambia during 1988. Out of 4000 crocodiles of different age groups, 300 yearlings were affected and 82 of those affected died. The lesions were prominent on the head, especially around the eyelids, the nostrils, both sides of the mouth, ventral neck, ventral pale belly, limbs and the root of the tail. Histologically, the epidermal lesions revealed large focal areas of marked acanthosis accompanied by hyperkeratosis and parakeratosis. In the prickle cells, there were multiple small neutrophilic granular inclusions and large eosinophilic homogeneous cytoplasmic inclusions. Electron microscopically, there were numerous poxvirus particles and matrices in the cytoplasm of many prickle cells. Dark blue homogeneous cytoplasmic inclusions in toluidine blue sections consisted of an electron opaque matrix with mature viral particles (160 x 200 x 230 nm). Furthermore, there were clumps of granular matrix containing immature viral particles (200 x 399 nm) in the cytoplasm. Various features of viral developing processes were observed.  相似文献   

An attempt to eradicate bovine leukemia virus infection in a public pasture     

H Itoh  N Ogasawara  K Ohshima  K Okada  S Numakunai  Y Seimiya 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1990,52(3):661-663

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The relationship between macroscopic strain and crystal lattice strain in wood under uniaxial stress in the fiber direction     

Takahisa Nakai  Hiroyuki Yamamoto  Tetsuya Nakao 《Journal of Wood Science》2005,51(2):193-194

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Initial shapes of stress-strain curve of wood specimen subjected to repeated combined compression and vibration stresses and the piezoelectric behavior     

Takahisa Nakai  Hiroyuki Yamamoto  Masatoshi Hamatake  Tetsuya Nakao 《Journal of Wood Science》2006,52(6):539-543

This study investigated the relationship between the initial shape of the stress (σ)-strain (ε) curve of a Chamaecyparis obtusa wood specimen subjected to repeated combined compression and vibration stresses at various angles between the fiber direction and load direction and the piezoelectric behavior. The main findings of the study are: (1) the σ-ε curve became convex initially, and then the stress was proportional to the strain. The σ-ε curve had almost the same shape during both loading and unloading. (2) The σ-piezoelectric voltage (P) curve was nonlinear, with a maximal point or cusp on the curve, which had almost the same shape during both loading and unloading, as was also observed for the σ-ε curve. (3) The plot of the first derivative of the stress [dσ/dε (= σ′)] against ε was nonlinear. The σ′-ε and P-ε curves at various angles were fairly similar. (4) The stress at the maximal point (or cusp) of the σ-P curve decreased with an increase in the angle between the fiber direction and load direction. The tendency of the stresses was very similar to that of Young’s modulus and compression strength calculated from Hook’s law and Hankinson’s law, respectively.  相似文献   

Vibrational properties of wood plastic plywood     

Yingcheng Hu  Tetsuya Nakao  Takahisa Nakai  Jiyou Gu  Fenghu Wang 《Journal of Wood Science》2005,51(3):315-315

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Assessment of variations in air-dry wood density using time-of-flight near-infrared spectroscopy     

Guillaume Hans  Ryunosuke Kitamura  Tetsuya Inagaki  Brigitte Leblon  Satoru Tsuchikawa 《Wood material science & engineering》2015,10(1):57-68

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Mechanical behavior of the crystal lattice of natural cellulose in wood under repeated uniaxial tension stress in the fiber direction     

Takahisa Nakai  Hiroyuki Yamamoto  Tetsuya Nakao  Masatoshi Hamatake 《Wood Science and Technology》2006,40(8):683-695

This study investigated the relationship between the cellulose crystal lattice strain (crystalline region) and the macroscopic surface strain in specimens of Chamaecyparis obtusa wood under repeated uniaxial tension stress in the fiber direction. Changes in the strain of the crystal lattice were measured from the peak of (004) reflection using the transit X-ray method. The macroscopic surface strain of each specimen was measured with a strain gauge. In both loading and unloading, the surface strain changed linearly with changes in stress. However, crystal lattice strain was not linear but exhibited changes along a curve with changing stress. Under stressed conditions, the crystal lattice strain was always less than the surface strain, regardless of the frequency of repetition in the loading and unloading cycle. The ratio of the crystal lattice strain to the surface strain showed a negative correlation for stress in both loading and unloading. That is, the ratio decreased with increasing stress, and finally tend to converge to a specific value. The ratio (I/I ₀) between the diffracted intensity (I ₀) in the (004) plane in the unloaded condition and the diffracted intensity (I) in the (004) plane in the loaded condition tend to converge on a specific value with increasing frequency of repetition. When the substantial tension Young’s modulus of the wood in the longitudinal direction decreased, the ratio of the strain of the crystal lattice to the surface strain also decreased. Moreover, the ratio decreased with increasing microfibril angle of the specimen.  相似文献   

Effects of light and microsite conditions on tree size of 6-year-old Cryptomeria japonica planted in a group selection opening     

Toru Kohama  Nobuya Mizoue  Satoshi Ito  Akio Inoue  Kotaro Sakuta  Hiroyuki Okada 《Journal of Forest Research》2006,11(4):235-242

We examined the extent to which direct and indirect measures of light and microsite conditions could explain variation in tree height and diameter at the base of 6-year-old Cryptomeria japonica trees planted in a group selection opening of about 0.32 ha on a steep slope at Shiiba, Miyazaki Prefecture, southern Japan. We first used the gap light index (GLI) and soil thickness (ST) as directly measured indices. For an indirect measure of light, we used a between-cohort competition index (BCI) estimated from the position and total height of residual trees. For indirect measures of microsite, we examined topographic indices (slope, plan and profile curvature, average slope gradient, and relative elevation) derived from digital elevation models (DEMs) with different resolutions ranging from 2 to 10 m. The multiple linear regression using GLI and ST explained about 45% of variation in tree size, while simple regression using only GLI explained about 35%. The contribution of ST was about half of GLI. The multiple regressions using BCI and the topographic indices did not explain any more variation than using BCI alone (R ² of about 0.26). We conclude that microsite conditions with shallower soil and steeper slope have negative effects on tree growth in group selection openings, although the relative importance is smaller than light conditions. More comprehensive studies considering several openings with more heterogeneous topography including different species are needed to generalize our growth prediction using the indirect measures, which are useful for practical forest management.  相似文献