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21.
Riassunto Topi immunizzati con membrane isolate daSalmonella typhimurium presentano una resistenza alla infezione sperimentale uguale a quella dimostrata da topi immunizzati conSalmonelle viventi. 相似文献
22.
M. A. Livrea C. Nicotra A. Bongiorno G. Ciaramitaro M. Romano 《Cellular and molecular life sciences : CMLS》1980,36(8):894-895
Summary An isolation procedure to obtain rod outer segments from cattle retinas is reported. Centrifugation of homogenates in discontinuous and continuous sucrose density gradients yields purified photoreceptor cell outer segments. Assay of the final preparation for rhodopsin content gives a ratio of 2.4 for DO280 nm/DO498 nm. 相似文献