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291.
Vibrational properties and fine structural properties of wood were measured at high temperatures. Sitka spruce (Picea sitchensis Carr.) and Shioji (Japanese ash, Fraxinus spaethiana Lingelsh.) were used as specimens. The specimens, the system to support them, a magnetic driver, and a deflection sensor
were in an electric drying oven, where vibration tests were conducted. The heating temperatures ranged from room temperature
to 200 °C in 25 °C increments in both heating and cooling processes. X-ray diffractometry was carried out using positive sensitive
proportional counter (PSPC) at room temperature to 200 °C in 20 °C increments in both heating and cooling processes.
Received 13 December 1999 相似文献
292.
Kagawa T Sakai T Suetsugu N Oikawa K Ishiguro S Kato T Tabata S Okada K Wada M 《Science (New York, N.Y.)》2001,291(5511):2138-2141
Chloroplasts relocate their positions in a cell in response to the intensity of incident light, moving to the side wall of the cell to avoid strong light, but gathering at the front face under weak light to maximize light interception. Here, Arabidopsis thaliana mutants defective in the avoidance response were isolated, and the mutated gene was identified as NPL1 (NPH-like 1), a homolog of NPH1 (nonphototropic hypocotyl 1), a blue light receptor used in phototropism. Hence, NPL1 is likely a blue light receptor regulating the avoidance response under strong light. 相似文献
293.
Detection of cell-affecting agents with a silicon biosensor 总被引:9,自引:0,他引:9
J W Parce J C Owicki K M Kercso G B Sigal H G Wada V C Muir L J Bousse K L Ross B I Sikic H M McConnell 《Science (New York, N.Y.)》1989,246(4927):243-247
Cellular metabolism is affected by many factors in a cell's environment. Given a sufficiently sensitive method for measuring cellular metabolic rates, it should be possible to detect a wide variety of chemical and physical stimuli. A biosensor has been constructed in which living cells are confined to a flow chamber in which a potentiometric sensor continually measures the rate of production of acidic metabolites. Exploratory studies demonstrate several applications of the device in basic science and technology. 相似文献
294.
In order to determine the absolute configuration of naturally occurring alloxanthin, a HPLC analytical method for three stereoisomers 1a–c was established by using a chiral column. Two authentic samples, (3S,3′S)- and meso-stereoisomers 1b and 1c, were chemically synthesized according to the method previously developed for (3R,3′R)-alloxanthin (1a). Application of this method to various alloxanthin specimens of aquatic animals demonstrated that those isolated from shellfishes, tunicates, and crucian carp are identical with (3R,3′R)-stereoisomer 1a, and unexpectedly those from lake shrimp, catfish, biwa goby, and biwa trout are mixtures of three stereoisomers of 1a–c. 相似文献
295.
296.
Takagi H Hirose S Yasuda H Takaiwa F 《Journal of agricultural and food chemistry》2006,54(26):9901-9905
Transgenic rice seeds, which express a hybrid peptide comprising seven predominant human T cell epitopes (7Crp) derived from Japanese cedar pollen allergens, have been shown to function as an effective edible vaccine for the control of pollen allergen-induced responses. In this study, we characterized biochemical properties of transgenic seeds expressing the 7Crp peptide. The levels of chemical compositions, such as carbohydrate, protein, lipid, amino acid, fatty acid, mineral, and vitamin, were substantially equivalent between transgenic 7Crp and its nontransgenic counterpart seeds. The contents of three major allergenic proteins in transgenic seeds were not enhanced by expression of the 7Crp peptide when compared with those of nontransgenic seeds. The 7Crp peptide expressed in seeds was susceptible to simulated gastric/intestinal fluids. N-Glycosylation was not observed in the 7Crp peptide sequence. These results indicate that transgenic 7Crp seeds are substantially equivalent to nontransgenic parental seeds except for the presence of the 7Crp peptide. Keywords: Food safety assessment; transgenic rice seed; edible vaccine; peptide-based immunotherapy; Japanese cedar pollinosis. 相似文献
297.
A limbal melanoma was surgically removed from a 12-year-old castrated male black domestic shorthair (DSH) cat. The resulting full-thickness eye wall defect was repaired using the autologous third eyelid cartilage. The patient was followed for 85 days postoperatively, during which time there was no recurrence. Other than a small amount of fibrin and blood at the anterior lens capsule, no significant complications were seen. Use of the third eyelid cartilage as graft material following resection of a feline limbal melanoma can be effective for repairing large eye wall defects and preserving ocular function. The third eyelid proved to be a convenient source of graft material. In addition, autologous grafting can reduce the potential for iatrogenic spread of infectious agents such as feline herpes virus. 相似文献
298.
Sakae Horisawa Makoto Yoshida Kiwamu Umezawa Tomoko Wada Hisashi Abe Shuichi Doi Masahiro Samejima Ikuo Momohara 《Journal of Wood Science》2017,63(4):369-378
The diversity and community structures of wood-inhabiting fungi in 16 decayed wood samples from ten wooden houses in Japan were analyzed using a next-generation sequencing (NGS) to determine the fungi responsible for wood decay. DNA of fungi in decayed wood was extracted directly, the internal transcribed spacer (ITS) region in ribosomal DNA (rDNA) was amplified by polymerase chain reaction (PCR), and then, sequences of tagged ITS fragments were analyzed by NGS. Results of sequencing indicated that 68 species of ascomycetes, 37 species of basidiomycetes, and one fungus each from Mortierellales and Mucoromycetes were detected. The fungal community structures showed diversity and included various species of ascomycetes. A microscopic examination of cell wall structure in decayed wood samples suggested that some ascomycetes were soft-rot fungi. Heat map analysis indicated that the similarity in the structures of fungal communities was influenced to a greater extent by the wood species of samples than where they were used as a component. 相似文献