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High-pressure liquid chromatography was used with a 5-micrometer silica gel column to quantitate the phenol in phenolated calamine lotion USP and a commercial antiseptic solution. This method requires less than 10 min/assay, and other compounds present in the products analyzed did not interfere. 相似文献
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Under consideration are principle conceptions of G. A. Shmidt on the ecological method in embryology: succession between the compared species, difference in the ecology and organization of adult individuals, distinctions in the course of embryogenesis. Difficulties in a strict observation of all these principles are analyzed in comparative embryological investigations. Possible use of the above principles for studying the intrespecies variability of ontogenetical processes is shown. 相似文献
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