| trace element levels in whole blood of riparian villagers of the brazilian amazon. | monitoring the nutritional status of essential elements is of critical importance in human health. however, trace element concentrations in biological fluids are affected by environmental and physiological parameters, and therefore considerable variations can occur between specific population subgroups. brazil is a large country with much food diversity. moreover, dietary habits differ from north to south. as an example, the traditional populations of the brazilian amazon basin are heavily depen ... | 2009 | 19329141 |
| frozen chicken for wild fish: nutritional transition in the brazilian amazon region determined by carbon and nitrogen stable isotope ratios in fingernails. | objectives: amazonian populations are experiencing dietary changes characteristic of the nutrition transition. however, the degree of change appears to vary between urban and rural settings. to investigate this process, we determined carbon and nitrogen stable isotope ratios in fingernails and dietary intake of amazonian populations living along a rural to urban continuum along the solimões river in brazil. methods: carbon and nitrogen stable isotope ratios were analyzed from the fingernails of ... | 2011 | 21630371 |
| assessment of bacterial bph gene in amazonian dark earth and their adjacent soils. | amazonian anthrosols are known to harbour distinct and highly diverse microbial communities. as most of the current assessments of these communities are based on taxonomic profiles, the functional gene structure of these communities, such as those responsible for key steps in the carbon cycle, mostly remain elusive. to gain insights into the diversity of catabolic genes involved in the degradation of hydrocarbons in anthropogenic horizons, we analysed the bacterial bph gene community structure, ... | 2014 | 24927167 |
| manioc flour consumption as a risk factor for lead poisoning in the brazilian amazon. | recent studies reported elevated blood lead (pb) levels in riparian populations of the amazon. for this reason, the aim of the present study was to assess the risk to riparians in the brazilian amazon to pb exposure due to the intake of contaminated manioc flour. lead levels were determined in whole blood (n = 74) and in manioc flour samples (n = 30) in three different communities. mean blood pb levels were 16.8 μg/dl, with individuals living in açaituba presenting the highest mean blood pb leve ... | 2013 | 23356650 |
| evidence for mid-holocene rice domestication in the americas. | the development of agriculture is one of humankind's most pivotal achievements. questions about plant domestication and the origins of agriculture have engaged scholars for well over a century, with implications for understanding its legacy on global subsistence strategies, plant distribution, population health and the global methane budget. rice is one of the most important crops to be domesticated globally, with both asia (oryza sativa l.) and africa (oryza glaberrima steud.) discussed as prim ... | 2017 | 28993622 |
| elevated blood lead levels in a riverside population in the brazilian amazon. | lead (pb) is recognized as one of the most toxic metals. sources of pb exposure have been widely documented in north america, and the removal of pb additives from gasoline was reflected in a dramatic lowering of blood pb concentration. in latin america, the removal of pb from gasoline resulted in decreased exposure, but pb levels in many areas remain high due to occupational and environmental sources of exposure. while many of the pb sources have been identified (mining, industries, battery recy ... | 2009 | 19389665 |
| population history of manihot esculenta (euphorbiaceae) inferred from nuclear dna sequences. | the nature of gene flow in plants -- including the propensity for interspecific introgression -- makes them interesting candidates for phylogeographical analysis. plant phylogeography studies have been limited, however, by the availability of suitable intraspecific variation. in this study, dna sequence variation from a nuclear gene [glyceraldehyde 3-phosphate dehydrogenase; (g3pdh)] was used to examine the population history of manihot esculenta ssp. flabellifolia and a potentially hybridizing ... | 2002 | 11975706 |
| guaraná (paullinia cupana var. sorbilis): ecological and social perspectives on an economic plant of the central amazon basin. | guaraná is considered an ideal crop for supplementing the incomes of small peasant farmers in the amazon basin. a fast-growing perennial, guaraná can be planted in the midst of manioc crops, allowing the formation of extensive orchards in the place of regenerating scrub once the manioc has been harvested. traditional forms of guaraná agriculture practised by the saterê-mawé indians compare favourably with the plantation system favoured by government agronomists. indigenous techniques of hand-pro ... | 1982 | 7154700 |
| what is a population? spouse import in the northwest amazon. | in northwest amazon societies, diverse groups marry across linguistic and geographic barriers: kinship and kin proximity occur according to cultural rules, and kinship, language, and residence may not be equated with genetic relatedness, as previously postulated. the assumption of genetic relatedness and random mating within a prescribed geographic zone or linguistic unit does not always hold true. models should be based on cultural determinants of population dynamics that are more sensitive to ... | 1994 | 12319063 |
| nutrition in transition: dietary patterns of rural amazonian women during a period of economic change. | the goal of this study was to understand the relationship between economic change (wage labor, retirement, and the bolsa família program) and dietary patterns in the rural amazon and to determine the extent to which these changes followed the pattern of the nutrition transition. | 2011 | 21538648 |