These notes contain a series of ten lectures delivered at the ''Universidad Nacional Autonoma de Mexico'' on its ''Primer Seminario de K-Teoria Algebraica''. They provide an introduction to the subject as well as to the other expositions in this volume.…

dentification of groups that are similar in their floristic composition and structure (habitat types) is essential for conservation and forest managers to allocate high priority areas and to designate areas for reserves, refuges, and other protected areas. In this study,…

The effect of schooling on nutritional knowledge, attitudes and nutritional outcomes in Ethiopia was investigated. Data were obtained in late 1989 in Debre Birhan in Shoa province from three groups: 267 mothers, 114 clinic users and six primary schools with…

Stemming from the dialectical concepts of critical epistemology developed by feminism and Critical Theory (specifically, the Frankfurt School), this thesis attempts to articulate the political dimension of knowledge and to demonstrate how this dimension is incorporated into the liberatory pedagogical…

Biogeography is a discipline included in comparative biology that studies the distribution of organisms, the distributional patterns of organisms are analyzed through the application of different methods, depending on the question formulated. In this work the principles and advantages of…

Diabetes mellitus is a syndrome which affects more and more people in all countries over the world. In Mexico, it is commonly treated with herbal extracts. Such treatment may be of considerable benefit especially during the early stages of the…

Traditional mycological knowledge of most Mexican ethnic groups has proven to be extensive and profound, consuming nearly 300 species of wild mushrooms. In this paper, we identified the mushrooms used by Zapotecs of Ixtlan, Oaxaca, compiled their traditional knowledge and…

Early in the twentieth century it was shown that Mendel's laws apply to plants and animals and that genes reside on chromosomes. In the 1950s the double-helix model of DNA inaugurated the molecular biology era, which culminated at the end…

A survey of lignicolous freshwater ascomycetes was carried out in Las Ilusiones Lagoon located in the metropolitan area of Villahermosa City State of Tabasco, Mexico. Aniptodera inflatiascigera, Ascosacculus aquaticus and A. heteroguttulatus are recorded for the first time from Mexico.…

A new terrestrial species of Pseudoeurycea is described from the mountains of the Mixteca region of Oaxaca. Compared with other members of the genus, the new species is relatively slender and short-legged. The background color of the dorsum of this…