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91.
C3H mice were infected subcutaneously with 105 promastigotes of Leishmania mexicana and subsequent lesions were examined at 3, 5, and 8 months. All animals developed persistent nonulcerating nodules of variable size which did not metastasize. The nodules contained amastigotes with a mononuclear infiltrate of histiocytes, lymphocytes, and plasma cells, but without formation of tuberculoid-type granulomas. Neutrophils and eosinophils were also encountered in some cases. Specific antileishmanial antibodies and delayed-type hypersensitivity to leishmanial antigen were present at 3, 5, and 8 months postinfection. L. mexicana infection in C3H mice differs from classic self-healing cutaneous leishmaniasis by the pesistence of nonhealing, nonulcerating, nonmetastasizing lesions, despite evidence of cellular and humoral immunity. 相似文献
92.
M. Anastassova-Kristeva H. Nicoloff S. Georgiev 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1978,53(5):229-231
Summary Six varieties of Triticum monococcum were analysed by means of the nucleolar test; i.e., estimation of the maximum number of primary nucleoli per nucleus. All of the varieties exhibited 4 primary nucleoli in telophase and early interphase. Following detailed karyological analysis four SAT chromosomes in all six karyotypes were found in accordance with the maximum nucleolar number. Secondary constrictions and microsatellites were localised on the short arms of chromosome pairs 3 and 5. A new order of the chromosomes in the idiogram of Tr. monococcum is proposed. 相似文献
93.
Radial estimates and the test for sphericity 总被引:1,自引:0,他引:1
94.
Robust properties of likelihood ratio tests 总被引:2,自引:0,他引:2
95.
Tadayo Hashimoto 《Journal of microbiological methods》1983,1(2):89-98
A micromethod for the quantitative determination of the viability of Candida albicans hypae was devised which takes advantage of the dimorphic nature of C. albicans which grows exclusively in the yeast form when incubated aerobically on Sabouraud dextrose agar at 30°C. When tested by thisd method, all viable, C. albicans hyphae were recognized as microcolonies consisting of one hypha surrounded by several yeast form progeny. In contrast to this, no yeast form progeny emerged from nonviable hypae. By counting appropriate total numbers (200–400) of microcolony-forming hypae and infertile hyphae, it was possible to determine the ratio of viable to nonviable cells in a given hyphal suspension. This micromethod may be used for quantitative assessment of the candidacidal effects of various antimycotic agents or phagocytes C. albicans hyphae whose viability could not have been determined by the conventional plating technique because of the species' high propensity to clump. 相似文献
96.
本文对大连印染厂试产的X—Si—4有机硅等抗菌整理布进行了抗菌效力检测,显示对细菌具100%的抑菌率,而且有较强皮肤癣菌和污染性霉菌的效力,同时具耐紫外线照射,耐高温高压,耐洗涤等优良性能。试验均达预期效果,表明方法简易,重复性好,结果可信。本文并从菌种的选择,试验方法的配合使用,抗菌整理布的优良性能测试等诸方面进行了探讨。 相似文献
97.
98.
Test fishing with multimesh gillnets was performed in 103 acidified Swedish lakes before and 2–4 years after liming. In a subset of 39 lakes additional test fishing was carried out 5–9 years after liming. Taking into account the sampling biases due to differences between water temperature and number of nets used on different sampling occasions, an increase of the total CPUE, the number of species caught and recruitment of dominating species was evident after liming. Decreased recruitment was found for perch (Perca fluviatilis) at a pH below 5.2 and for roach (Rutilus rutilus) at a pH below 6.1. During the acidification phase and 2–4 years after liming acid-tolerant perch dominated the lakes, but when a longer time had elapsed after liming species dominance shifted and acid-sensitive planktivorous species increased in CPUE while perch decreased. 相似文献
99.
100.
Nonparametric tests of the Markov model for survival data 总被引:1,自引:0,他引:1