nutrition in pregnancy in central america and panama. 19751130352
studies on resistance to carbamate and organophosphorus insecticides in anopheles albimanus. 19725074693
[aflatoxins in newly harvested corn in panama].mycotoxins are fungal metabolites that may contaminate foods and feeds, resulting at times in important disease in humans and animals. thirty-six samples of nine varieties of newly harvested corn (4 samples each variety) were analyzed in search of aflatoxins by thin layer chromatography and high pressure liquid chromatography, and also cultured for the presence of aspergillus flavus. of the 36 samples studied, one was contaminated with 1290 ppb aflatoxin b1, which is 258x the concentration sugge ...200015881740
gel-based proteomics reveals potential novel protein markers of ozone stress in leaves of cultivated bean and maize species of panama.we examined responses of cultivated bean (phaseolus vulgaris l. cv. idiap r-3) and maize (zea mays l. cv. guarare 8128) plants exposed to ozone (o(3)) using a leaf injury assessment and proteomics approach. plants grown for 16 days in greenhouse were transferred to an o(3) chamber and exposed continuously to 0.2 ppm o(3) or filtered pollutant-free air for up to 72 h. cbb-stained gels revealed changes in ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) protein. by western analysis change ...200717987633
[detection of aflatoxins and isolation of toxigenic aspergillus flavus in corn and rice]. 19883126540
identification of teosinte, maize, and tripsacum in mesoamerica by using pollen, starch grains, and phytoliths.we examined pollen grains and starch granules from a large number of modern populations of teosinte (wild zea spp.), maize (zea mays l.), and closely related grasses in the genus tripsacum to assess their strengths and weaknesses in studying the origins and early dispersals of maize in its mesoamerican cradle of origin. we report new diagnostic criteria and question the accuracy of others used previously by investigators to identify ancient maize where its wild ancestor, teosinte, is native. pol ...200717978176
starch grain evidence for the preceramic dispersals of maize and root crops into tropical dry and humid forests of panama.the central american isthmus was a major dispersal route for plant taxa originally brought under cultivation in the domestication centers of southern mexico and northern south america. recently developed methodologies in the archaeological and biological sciences are providing increasing amounts of data regarding the timing and nature of these dispersals and the associated transition to food production in various regions. one of these methodologies, starch grain analysis, recovers identifiable m ...200717360697
starch grains reveal early root crop horticulture in the panamanian tropical forest.native american populations are known to have cultivated a large number of plants and domesticated them for their starch-rich underground organs. suggestions that the likely source of many of these crops, the tropical forest, was an early and influential centre of plant husbandry have long been controversial because the organic remains of roots and tubers are poorly preserved in archaeological sediments from the humid tropics. here we report the occurrence of starch grains identifiable as manioc ...200011057665
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