An alarming loss of genetic variability of three Andean tubers (Ullucus tuberosus, ullucus; Oxalis tuberosa, oca; and, Tropaeolum tuberosum, mashua) has been observed during the last decades due to many factors such us the introduction of new varieties, droughts, changes in food habits, encroaching agriculture, deforestation and the migration from rural to urban areas. Thus, a pilot study was c...

OBJECTIVE Osteopontin (OPN) is a secreted glycoprotein involved in a range of physiologic processes, including inflammation, immunity mediated by Th1 cells, and bone remodeling. It is expressed in the joints of rheumatoid arthritis patients and has been the subject of conflicting reports concerning its role in arthritis induced by antibodies against type II collagen. This study assessed the rol...

The Three Gorges Reservoir Area is one of the most severe soil erosion in China. Serious erosion has degraded the soil productivity, deteriorated the ecological environment, and influenced the service life of Three Gorges Reservoir. The natural and social-economic factors which influence the soil erosion in Three Gorges Reservoir Area include topography, geological situation, vegetation, rainfa...

Interest in biotic invasions has grown as the entry, spread and proliferation of organisms beyond their native ranges is accelerating world-wide. The study of invasions can make use of these natural experiments for better understanding community composition changes, the rate and character of natural selection, genetic drift, and coevolution. Biotic invasions are part of the global change caused...

Potter, K. N., Williams, J. R., Larney, F. J. and Bullock, M. S. 1998. Evaluation of EPIC’s wind erosion submodel using data from southern Alberta. Can. J. Soil Sci. 78: 485–492. Wind erosion models have been used to assess policy impacts on soil erosion, but validation of models has been difficult until recently. We evaluated the Environmental Policy Integrated Climate (EPIC) wind erosion subm...