منابع مشابه
Pathogens and the placental fortress.
Placental infections are major causes of maternal and fetal disease. This review introduces a new paradigm for placental infections based on current knowledge of placental defenses and how this barrier can be breached. Transmission of pathogens from mother to fetus can occur at two sites of direct contact between maternal cells and specialized fetal cells (trophoblasts) in the human placenta: f...
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Termites are known for building some of the most elaborate architectures observed in the animal world. We here analyse some topological properties of three dimensional networks of galleries built by termites of the genus Cubitermes. These networks are extremely sparse, in spite of the fact that there is no building cost associated with higher connectivity. In addition, more “central” vertices (...
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Why are some defence mechanisms expressed constitutively, while others are induced only upon exposure? Experimental evolution in a bacteria-phage system provides empirical support for the prediction that high frequency of exposure to parasites selects for constitutive defence despite associated costs.
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ژورنال
عنوان ژورنال: Current Opinion in Microbiology
سال: 2012
ISSN: 1369-5274
DOI: 10.1016/j.mib.2011.11.006