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61.
For plywood specimens under shear through the thickness, a fatigue life prediction method based on strain energy has been
newly developed with the fatigue process and failure criterion applicable to various loading conditions. Once the fatigue
process and failure criterion of the plywood specimen were determined by the fatigue data measured under a loading condition
other than the square loading waveform, the fatigue life of a specimen under various loading conditions could be predicted
easily and accurately by the first cycle loading test. The relationship between stress level and the predicted fatigue life
was also similar to that between stress level and the experimentally determined fatigue life. The fatigue life prediction
method proposed may be widely applicable to the prediction of the fatigue life of solid wood and wood composites. 相似文献
62.
Yumiko Yamasaki Hitoshi Kunoh Hiroyuki Yamamoto Kazuya Akimitsu 《Journal of General Plant Pathology》2007,73(3):168-179
Volatile compounds of plants, including monoterpenes, are a possible source of signal molecules that induce defense systems
to protect plants from tissue damage. Volatile compounds from rough lemon leaves were trapped by solid-phase microextraction
fibers in sealed vials, and subsequent gas chromatography–mass spectrometry and gas chromatography analyses identified the
profile of the major components, mainly various monoterpenes. Among several monoterpenes examined, citral, citronellal, and
linalool significantly inhibited the spore germination and hyphal growth of Alternaria alternata. The effect of linalool was fungistatic, while the effects of citral and citronellal were partially fungicidal. Wounding
of rough lemon leaves induced a significant increase in release of monoterpenes. The release of linalool was the most abundant
and was 14.5 times that of unwounded rough lemon leaves. Unlike the wounding treatment, microbe attack did not significantly
change monoterpene releases, and there was statistically no difference found in the peak areas from microbe-treated and untreated
leaves. Linalool, limonene, and β-pinene also had insect-repellant effects on wild-type Drosophila melanogaster. Expression patterns of defense-related genes in rough lemon and rice significantly changed after treatment with vapors of
monoterpene volatiles. Taking these results together, monoterpene volatiles are likely to play roles in the defense of rough
lemon against microbe and insect pathogens. 相似文献
63.
Yamato O Matsunaga S Takata K Uetsuka K Satoh H Shoda T Baba Y Yasoshima A Kato K Takahashi K Yamasaki M Nakayama H Doi K Maede Y Ogawa H 《The Veterinary record》2004,155(23):739-744
A five-month-old, female Japanese domestic shorthair cat with proportionate dwarfism developed neurological disorders, including ataxia, decreased postural responses and generalised body and head tremors, at between two and five months of age. Leucocytosis due to lymphocytosis with abnormal cytoplasmic vacuolations was observed. The concentration of G(M2)-ganglioside in its cerebrospinal fluid was markedly higher than in normal cats, and the activities of beta-hexosaminidases A and B in its leucocytes were markedly reduced. On the basis of these biochemical data, the cat was diagnosed antemortem with G(M2)-gangliosidosis variant 0 (Sandhoff-like disease). The neurological signs became more severe and the cat died at 10 months of age. Histopathologically, neurons throughout the central nervous system were distended, and an ultrastructural study revealed membranous cytoplasmic bodies in these distended neurons. The compound which accumulated in the brain was identified as G(M2)-ganglioside, confirming G(M2)-gangliosidosis. A family study revealed that there were probable heterozygous carriers in which the activities of leucocyte beta-hexosaminidases A and B were less than half the normal value. The Sandhoff-like disease observed in this family of Japanese domestic cats is the first occurrence reported in Japan. 相似文献
64.
Sano J Oguma K Kano R Tsumagari S Hasegawa A 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(1):103-105
Polymorphonuclear neutrophil (PMN) apoptosis was examined in three dogs with pyometra by TUNEL assay in a 24-hr incubation period and compared with that in healthy control dogs (n=5). The incidence of apoptotic PMNs in dogs with pyometra was 26.4 +/- 5% and that in healthy dogs was 54.3 +/- 7%. The results indicated that apoptotic PMN rates in dogs with pyometra were significantly lower than those in control dogs (p<0.05), suggesting the prolongation of PMN survival. 相似文献
65.
K Yamasaki T Taga Y Hirata H Yawata Y Kawanishi B Seed T Taniguchi T Hirano T Kishimoto 《Science (New York, N.Y.)》1988,241(4867):825-828
Interleukin-6 (IL-6/BSF-2/IFN beta 2) is a multifunctional cytokine that regulates the growth and differentiation of various tissues, and is known particularly for its role in the immune response and acute phase reactions. A complementary DNA encoding the human IL-6 receptor (IL-6-R) has now been isolated. The IL-6-R consists of 468 amino acids, including a signal peptide of approximately 19 amino acids and a domain of approximately 90 amino acids that is similar to a domain in the immunoglobulin (Ig) superfamily. The cytoplasmic domain of approximately 82 amino acids lacks a tyrosine/kinase domain, unlike other growth factor receptors. 相似文献
66.
Tumor promoters inhibit morphological differentiation in cultured mouse neuroblastoma cells 总被引:15,自引:0,他引:15
When added to mouse neuroblastoma cultures, the potent tumor promoter 12-O-tetradecanoyl-phorbol-13-acetate (TPA) inhibits spontaneous neurite formation as well as that induced in response to serum deprivation, prostaglandin E1, 5-bromo-2'-deoxyuridine, and papaverine. Other tumor-promoting macrocyclic plant diterpenes also inhibit neurite formation, whereas nonpromoting diterpenes do not. Inhibition by TPA was reversible and was unrelated to toxicity. 相似文献
67.
Gimena Feijo Kanji Yamasaki Luis Delucchi Jos Manuel Verdes 《Journal of veterinary diagnostic investigation》2021,33(4):640
We examined the cerebellum and cerebrum of 4 vaccinated dogs, 3–60-mo-old, that displayed clinical signs of canine distemper virus (CDV) infection, and died 7–40 d after developing neurologic signs. The main histologic lesions were demyelination, gliosis, meningitis, perivascular lymphocytic cuffing, and inclusion bodies. These lesions were similar in all 4 cases regardless of the time since vaccination, except that meningoencephalitis and gliosis were subacute in 3 dogs and chronic in 1 dog. However, these differences did not appear to be related to their vaccination status. Immunohistologically, a CDV-positive immunoreaction was seen mainly in astrocytes, neurons and their axons, lymphocytes around and in the blood vessels of the pia mater and choroid plexus, ependymal cells of each ventricle, and the cells of the choroid plexus. The histologic and immunohistologic changes were similar in the cerebellum and cerebrum. The genetic characterization of the virus strains in 2 of these naturally occurring canine distemper cases confirmed that they were South American wild-type strains (Kiki and Uy251) belonging to the EU1/SA1 lineage. These strains are not included in the commercial CDV vaccines available in Uruguay. 相似文献
68.
Kikuzaki H Kayano S Fukutsuka N Aoki A Kasamatsu K Yamasaki Y Mitani T Nakatani N 《Journal of agricultural and food chemistry》2004,52(2):344-349
Four new abscisic acid related compounds (1-4), together with (+)-abscisic acid (5), (+)-beta-D-glucopyranosyl abscisate (6), (6S,9R)-roseoside (7), and two lignan glucosides ((+)-pinoresinol mono-beta-D-glucopyranoside (8) and 3-(beta-D-glucopyranosyloxymethyl)-2- (4-hydroxy-3-methoxyphenyl)-5-(3-hydroxypropyl)-7-methoxy-(2R,3S)-dihydrobenzofuran (9)) were isolated from the antioxidative ethanol extract of prunes (Prunus domestica L.). The structures of 1-4 were elucidated on the basis of NMR and MS spectrometric data to be rel-5-(3S,8S-dihydroxy-1R,5S-dimethyl-7-oxa-6-oxobicyclo[3,2,1]oct-8-yl)-3-methyl-2Z,4E-pentadienoic acid (1), rel-5-(3S,8S-dihydroxy-1R,5S-dimethyl-7-oxa-6-oxobicyclo[3,2,1]oct-8-yl)-3-methyl-2Z,4E-pentadienoic acid 3'-O-beta-d-glucopyranoside (2), rel-5-(1R,5S-dimethyl-3R,4R,8S-trihydroxy-7-oxa-6-oxobicyclo[3,2,1]oct-8-yl)-3-methyl-2Z,4E-pentadienoic acid (3), and rel-5-(1R,5S-dimethyl-3R,4R,8S-trihydroxy-7-oxabicyclo[3,2,1]- oct-8-yl)-3-methyl-2Z,4E-pentadienoic acid (4). The antioxidant activities of these isolated compounds were evaluated on the basis of oxygen radical absorbance capacity (ORAC). The ORAC values of abscisic acid related compounds (1-7) were very low. Two lignans (8 and 9) were more effective antioxidants whose ORAC values were 1.09 and 2.33 micromol of Trolox equiv/micromol, respectively. 相似文献
69.
Shinya Ishihara Fukuhiro Yamasaki Pham Hai Ninh Nguyen Cong Dinh Aisaku Arakawa Masaaki Taniguchi Ngo Thi Kim Cuc Satoshi Mikawa Masaru Takeya Kazuhiro Kikuchi 《Animal Science Journal》2020,91(1)
Although there are a number of Vietnamese native pig (VnP) populations, some are on the verge of extinction, and therefore adequate management and conservation are necessary. In this study, we conducted a field survey of VnP populations and analyzed interrelationships among their characteristics. We also established a relational database for management of field data on these populations. For data collection, we conducted interviews with farmers and visual inspection of 32 VnP populations in 22 provinces of Vietnam, as well as taking photographs of individual animals. Data on the characteristics of VnP populations were subjected to multiple correspondence analysis (MCA). For establishment of the database, normalization and table partitioning were performed to eliminate redundancy and ensure consistency of the collected data items. Passport data, characteristics data, and image data were collected from a total of 1,918 VnPs and entered as a normalized table. Upon MCA, most of the populations were not separated from each other, but the Mong Cai, O Lam, and Chu Prong populations were separated from the other populations. Thus, we have constructed a relational database from comprehensive information on the characteristics of VnP populations. 相似文献
70.