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《California State Journal of Medicine》1923,21(10):434-435
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C. C. Gordon 《American journal of botany》1966,53(7):652-662
A study of four species of Erysiphaceae (Uncinula salicis, Podosphaera leucotricha, Erysiphe cichoracearum, and Microsphaera diffusa) revealed that the binucleate stages of the ascocarp are initiated in a similar manner to those of Diporotheca rhizophila Gordon & Shaw. The “appendages” developing on immature ascocarps are considered to be receptive hyphae. Appendages characteristic of mature ascocarps are produced much later. Lysis of certain centrum cells occurs, and asci are initiated from some of the remaining binucleate centrum cells. Resorption of centrum cells by the asci is supported by this investigation, corroborating Björling's earlier studies on Erysiphe graminis. 相似文献
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THE SECRETORY SYSTEM OF THE ROOTS OF THE COMPOSITAE 总被引:1,自引:1,他引:0
URSULA TETLEY 《The New phytologist》1925,24(3):138-162
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本文分两个部分分别探讨了单一和两维时间序列谱分析在研究作物量变过程规律中的意义、应用的原理和方法,并通过实例结果的分折表明这些方法的可行性,所揭示的生物学意义和这些方法的应用在研究作物量变过程中将可能具有的广泛的研究前景。 相似文献
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Cirrhosis of the liver has no effect upon the incidence of carcinoma of the prostate. 相似文献
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INVESTIGATION OF THE STRUCTURE OF THE CORNIFIED EPITHELIUM OF THE HUMAN SKIN 总被引:1,自引:1,他引:0 下载免费PDF全文
To explore the submicroscopic structure of the human callus by the polarization optical method, serial sections were prepared in three principal planes and the sign of double refraction as well as optic axes of various regions of the sections was determined. It was concluded that in areas under the grooves keratin is oriented parallel to the surface plane of the callus and to the direction of the grooves. In component structures of ridge areas such as in sweat duct areas a circumferential, in cross-band areas a linear, and in other parts a random structure was seen. The cross-bands of ridge areas in association with groove areas revealed a regular lattice-like submicroscopic pattern which was considered as an important mechanical system of the cornified epithelium. 相似文献
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