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Keiko Sakai Masahiro Matsunaga Kazuya Minato Fumiaki Nakatsubo 《Journal of Wood Science》1999,45(3):227-232
The impregnation of various simple phenolic and natural polycyclic compounds into wood was investigated from the viewpoints of vibrational property and dimensional stabilizing effect. When simple phenolic compounds were impregnated, the loss tangent (tan ) in the longitudinal direction increased linearly with increasing weight gain. Meanwhile, among the natural polycyclic compounds hematoxylin decreased the tan drastically by impregnation. It was suggested that the five hydroxyl groups and the pyran ring oxygen in the hematoxylin molecule contribute to formation of the crosslinkage-type hydrogen bonds between wood components. The rigidity of hematoxylin molecules may also be important. By impregnation of about 10% catechol, resorcinol, and saligenin, a 40% level of antiswelling efficiency (ASE) was attained, although a significant dimensional stabilizing effect was not observed after impregnation of natural polycyclic compounds.Part of this work has been published as a Rapid Communication inMokuzai Gakkaishi 43(12). It was also presented at the 48th annual meeting of the Japan Wood Research Society, Shizuoka, April 1998 相似文献
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为评价赤红壤酸铝对作物的毒害作用,本文用氧化钙和硫酸铝将典型赤红壤pH值调节为4.01、4.52、5.02、5.52,研究了7种作物对不同酸铝土壤的响应。结果表明,不同酸铝土壤中,7种作物相对根长与相对根干重呈相似变化趋势,均表现为pH 5.02土壤>pH 4.52土壤>pH 4.01土壤,水稻的相对根长与相对根干重较大,而大麦较小,通菜、玉米、菜豆、豆角、大豆位于其中。铝溶液处理下不同作物的相对根伸长均以水稻、大豆、菜豆、豆角>玉米>通菜>大麦,与土培结果基本一致;作物根系的苏木精染色程度随酸铝毒害程度的上升而加深,与作物铝吸收结果趋势相同。大麦、水稻、豆角染色较深,但其相对根长差异显著,表明它们具有不同的耐铝机制。 相似文献
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为了弄清克氏伪裸头绦虫的形态结构特征。用苏木素染色和齐尔石碳酸复红染色制作了猪源克氏伪裸头绦虫成虫染色标本,并对其进行形态学观察。结果显示：颈节、幼节和成节用15倍苏木素稀释染液染色12 h效果最佳,孕节以齐尔石碳酸复红染液染色24 h为最佳。克氏伪裸头绦虫成虫呈扁平状乳白色,所有节片纵轴小于横轴,从幼节到成节开始逐渐出现睾丸、贮精囊、阴茎囊、卵巢、卵黄腺、子宫和生殖孔等生殖器官。孕节内充满虫卵,睾丸、卵巢、贮精囊等器官退化,生殖孔未退化。研究结果补充了寄生虫实验教学标本库,为猪和人克氏伪裸头绦虫病控制提供了重要参考依据。 相似文献
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绦虫成虫制片方法的改进 总被引：3，自引：1，他引：3
目的制作结构清晰、颜色鲜亮、不易褪色的莫尼茨绦虫成虫染色标本。方法采用德氏(Delafield)苏木素染色液、盐酸卡红染色液和硼砂卡红染色液等3种染色液分别对莫尼茨绦虫成虫进行染色。结果用德氏(Delafield)苏木素染色液1:15稀释液,室温染色12h,盐酸酒精分色5~10m in,染色效果最好。结论德氏(Delafield)苏木素染色法,适用于各种大型绦虫成虫的染色标本的制作,在寄生虫学教学科研及动物检疫等方面有很大的使用价值。 相似文献
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Tadatoshi Nobata Hirohisa Kyougoku Takashi Miyano 《The Journal of reproduction and development》2013,59(5):500-505
During oocyte growth, the morphology of the nucleolus changes into a compact and
homogenous structure. The compact nucleoli in full-grown oocytes are not stained by
aceto-orcein staining or immunofluorescence staining. In this study, we developed a
hematoxylin staining method for pig oocytes in whole-mount preparations to visualize
the nucleoli. Nucleoli of growing and full-grown oocytes were stained blue with
hematoxylin. Using this staining method, the changes in the oocyte nucleolus during
maturation were examined. The nucleolar diameter gradually decreased in maturing
oocytes (10.7 ± 0.1 μm to 9.0 ± 0.7 μm, P<0.05) before germinal vesicle breakdown
(GVBD). The results suggest that the nucleolar volume of oocytes decreases before
GVBD. 相似文献
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