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排序方式: 共有938条查询结果,搜索用时 15 毫秒
931.
Heng Xu Chiaki Tanaka Tetsuya Nakao Masahiro Yoshinobu Hiroyuki Katayama 《Journal of Wood Science》1998,44(2):147-151
The rolling shear strength of plywood was evaluated using a flexural vibration test. Test specimens were lauan and Douglas fir three-ply plywoods made from thick veneers. The dynamic shear and Young's moduli were determined using the flexural vibration method, which involved in-plane and out-of-plane flexural vibration. The rolling shear strength was determined using the static destructive method, which is dependent on the direction of the lathe check in the core veneer. Before and after accelerated aging treatments were conducted, there were relations between out-of-plane dynamic properties (out-of-plane shear and Young's moduli) and its rolling shear strength. It was concluded that the rolling shear strength is related not only to the shear property of the core but the flexural stiffness of two faces when the deformation of out-of-plane plywood was not restrained.Part of this work was presented at the 47th Annual Meeting of The Japan Wood Research Society, Kochi, April 1997 相似文献
932.
Incongruence between RFLPs of chloroplast DNA and morphological classification in east Asian pear (Pyrus spp.) 总被引:5,自引:0,他引:5
Hiroyuki Iketani Tohru Manabe Nagao Matsuta Tomoya Akihama Tateki Hayashi 《Genetic Resources and Crop Evolution》1998,45(6):533-539
Polymorphism of chloroplast DNA of 106 accessions of Pyrus (mainly east Asian accessions) was examined. Four haplotypes were observed with the combination of three independent restriction site mutations digested by EcoO109 I, Sal I, and Xba I, respectively. In the occidental pear accessions only the most plesiomorphic type was observed, whereas all four types appeared in the oriental pear accessions. This suggests that the oriental species of Pyrus and occidental ones may have evolved independently. The distribution of four haplotypes in the east Asian pear was quite incongruent with the species or infrageneric classification using mainly morphological characters. Considering the high crossability and much occurrence of suspected interspecific hybrids in wild populations, this disaccord is inferred to be the results of the hybridization and introgression between species. 相似文献
933.
Hiroyuki Kawahigashi Hiroshi Mizuno Tsuyu Ando Jun-ichi Yonemaru Shigemitsu Kasuga 《Plant Breeding》2020,139(3):600-607
Some sorghum cultivars are sensitive to organophosphate insecticides, which cause red to purple injury spots and, in severe cases, leaf death. Sensitivity to organophosphates is conditioned by a single locus on chromosome 5. We constructed a high-density genetic map around the locus, termed osr, using DNA markers, and delimited osr to a 377-kb region on the short arm of chromosome 5. Sequence analysis of this region predicted 19 gene candidates. Four of the candidates are homologous to a disease resistance NBS-LRR gene. mRNA-Seq analysis of gene expression and SNPs from two resistant cultivars (‘JN43’ and ‘Greenleaf’) and one sensitive cultivar (‘Nakei MS3B’) suggest that one or more members of this NBS-LRR gene family are osr. Our results suggested that the recessive allele of osr results in sensitivity to OP insecticides. 相似文献
934.
Yoshinori Takahashi Tatsuya Konishi Hiroyuki Enari Heon-sik Lee Won Kyung Lee Young Sun Lee Hyoung Kook Park Shigeru Yamamoto 《Fisheries Science》2011,77(6):1045-1052
Protamine is a basic protein whose sulfate is used in medical applications as a carrier for injectable insulin and as a heparin
antagonist, while its hydrochloride is used as an antibacterial ingredient for some food products. We previously showed that
protamine hydrochloride derived from chum salmon milt inhibited pancreatic lipase and reduced plasma triacylglycerol levels
in an oral fat tolerance test in humans. The present study evaluated the effect of chum protamine hydrochloride on lipid metabolism
in rats. The single oral administration of protamine hydrochloride (500 mg/kg) reduced plasma triacylglycerol levels in a
corn oil tolerance test, and repeated oral administration at a dose of 0, 150, 500, or 1,500 mg/kg with a high fat diet for
7 weeks significantly reduced body weight gain, liver weight, and epididymal adipose tissue, whereas total calorie intakes
were not significantly different. These findings could be caused by the suppression of lipid digestibility leading to a significant
increase in fecal lipid excretion due to the fact that protamine hydrochloride could bind with bile acids to make a complex
that is difficult to digest. Protamine hydrochloride, with a considerable history as food, can be considered to be promising
as an anti-obesity functional food material. 相似文献
935.
Hiroshi SUZUKI Hiroyuki WATANABE Yasuyuki ABE 《The Journal of reproduction and development》2022,68(1):1
Assisted reproductive techniques (ARTs), such as artificial insemination, in vitro fertilization, and cryopreservation of gametes/zygotes, have been developed to improve breeding and reproduction of livestock, and for the treatment of human infertility. Their widespread use has contributed to improvements in human health and welfare. However, in dogs, only artificial insemination using frozen semen is readily available as an ART to improve breeding and control genetic diversity. A recent priority in sperm cryopreservation is the development of alternatives to egg yolk, which is widely used as a component of the sperm extender. Egg yolk can vary in composition among batches and is prone to contamination by animal pathogens. The latter can be a problem for international exchange of cryopreserved semen. Low-density lipoprotein and skim milk are promising candidates for use as extenders, to ensure fertility after artificial insemination. Although not tested for its effects on fertility following artificial insemination, polyvinyl alcohol may also be a useful alternative to egg yolk as an extender. The development of cryopreservation techniques for canine embryos lags behind that for other mammals, including humans. However, given the success of non-surgical embryo transfer in 2011, studies have sought to refine this approach for practical use. Research on sperm cryopreservation has yielded satisfactory results. However, investigation of other approaches, such as cryopreservation of oocytes and gonadal tissues, remains insufficient. Techniques for the efficient induction of estrus may aid in the development of successful canine ARTs. 相似文献
936.
Chinese yam (‘yam’) was grown at different carbon dioxide concentrations ([CO2]), namely, ambient and elevated (ambient + 200 μmol mol?1), under low- and high-temperature regimes in summer and autumn, separately. For comparison, rice was also grown under these conditions. Mean air temperatures in the low- and high-temperatures were respectively 24.1 and 29.1 °C in summer experiment and 20.2 and 24.9 °C in autumn experiment. In summer experiment, yam vine length, leaf area, leaf dry weight (DW), and total DW were significantly higher under elevated [CO2] than ambient [CO2] in both temperature regimes. Additionally, number of leaves, vine DW, and root DW were significantly higher under elevated [CO2] than under ambient [CO2] in the low-temperature regime. In autumn experiment, tuber DW was significantly higher under elevated [CO2] than under ambient [CO2] in the high-temperature regime. These results demonstrate that yam shows positive growth responses to elevated [CO2]. Analysis of variance revealed that significant effect of [CO2] × air temperature interaction on yam total DW was not detected. Elevated-to-ambient [CO2] ratios of all growth parameters in summer experiment were higher in yam than in rice. The results suggest that the contribution of elevated [CO2] is higher in yam than in rice under summer. Yam net photosynthetic rate was significantly higher under elevated [CO2] than under ambient [CO2] in both temperature regimes in summer. Elevated [CO2] significantly affected on the rate in yam but not in rice in both experiments. These findings indicate that photosynthesis responds more readily to elevated [CO2] in yam than in rice. 相似文献
937.
Takeshi Yamamoto Kazuhisa Teruya Takashi Hara Hiroto Hokazono Hiroshi Hashimoto Nobuhiro Suzuki Yasuro Iwashita Hiroyuki Matsunari Hirofumi Furuita Keiichi Mushiake 《Fisheries Science》2008,74(5):1096-1108
To improve the nutritional quality of live foods and dry feeds ordinarily used for the seed production of amberjack Seriola dumerili, the nutrient contents of rotifers, Artemia nauplii and commercial feeds used in two larval production stations were evaluated. For comparison of the nutrient contents,
artificially produced larvae, wild-caught juveniles and wild zooplankton samples were also analyzed. The proportions of 22∶6n-3
in the polar lipid of the cultured larvae increased by feeding the dry feeds. The taurine contents of the cultured larvae
reflected the contents of their foods (rotifers<dry feed<Artemia nauplii). The taurine content and the proportion of 22∶6n-3 in Acartia spp. were higher than in foods fed to the larvae. These parameters in the wild juveniles were higher than the cultured ones.
The A/E ratios [(each essential amino acid/total essential amino acids)×1000] of the total amino acids of the live foods and
dry feeds were similar to those of the cultured larvae, except for the lower ratios of histidine, arginine, threonine and
lysine in the live foods. The mucosal folds of the intestine of the cultured larvae did not show typical signs of dietary
phospholipid deficiency. These results suggest that requirements of nutrients such as 22∶6n-3 and taurine should be determined
for mass production of amberjack seeds. 相似文献
938.
Evidence has been accumulating to suggest that disulfide bonding is one of the key causes of allergenicity. Recently we developed the “disulfide proteome”, a technique for the comprehensive analysis of disulfide bonding of proteins. We applied this new technique to the rice seed's salt‐soluble fraction, which has long been known to be allergenic. Most proteins in the fraction, including α‐amylase/trypsin inhibsitor, α‐ globulin, and glutelin fragments, have formed intramolecular disulfide bonds. Also, unknown proteins, including one sharing similarities with known allergens, had disulfide bonds, from which we can infer possible allergenicity. This is a preliminary study to screen allergens from the basis of disulfide bonding. 相似文献