A general discussion is provided of the waterhyacinth, which may become weed as a result of its uncontrolled reproduction, and of the five main control methods. The Mexican Aquatic Weed Control Program (PROCMA) is described, including its goals and guidelines. Information is given concerning COD, DO, pesticide residues, pH, conductivity and total phosphorus resulting from the use of 2,4-D, diquat and glyphosate in three dams infested with water hyacinth and cat-tail.
The derelict Remance gold mine is a possible source of pollution with potentially toxic elements (PTEs). In the study area, diverse mine waste has been left behind and exposed to weather conditions, and poses risks for soil, plants and water bodies, and also for the health of local inhabitants. This study sought to perform an ecological and health risk assessment of derelict gold mining areas with incomplete remediation, including: (i) characterizing the geochemical distribution of PTEs; (ii) assessing ecological risk by estimating the pollution load index (PLI) and potential ecological risk index (RI); (iii) assessing soil health by dehydrogenase activity; and iv) establishing non-carcinogenic (HI) and carcinogenic risks (CR) for local inhabitants. Soil health seems to depend on not only PTE concentrations, but also on organic matter (OM). Both indexes (PLI and RI) ranged from high to extreme near mining and waste accumulation sites. As indicated by both the HI and CR results, the mining area poses a health risk for local inhabitants and particularly for children. For this reason, it will be necessary to set up environmental management programs in the areas that are most affected (tailings and surrounding areas) and accordingly establish the best remediation strategies to minimize risks for the local population.
Objective: To describe cardiovascular risk factors in Atrial Fibrillation (AF) in relation with ischaemic
diseases in an emergency service.
Methodology: Cross-sectional study of patients with AF attended in the (ES) of the HUAV during 2016.
Epidemiological and clinical data and their CVRF were analysed. The statistical association was made
through the Chi-Square or Mann-Whitney test. The risk factors associated with AF were adjusted with
logistic regression models, calculating OR.
Results: We evaluated 552 patients with 46% men and (54%) women with an average age of 72.9 years. In
57 patients (10.3%), the detection of AF was coincidental. The younger patients presented with more
frequent palpitations (p <0.05) and the older patients had dyspnea (p <0.05). The older patients are the ones
that take longer to consult (p <0.05). 17% (94) of patients with AF have a heart attack before, during or after
the episode of AF, with a higher prevalence among men (p <0.05). The probability of diagnosing ischaemic
heart disease in a male patient with AF, hypertensive and diabetic is 71%.
Conclusion: In men with hypertension and DM a correct diagnostic and therapeutic management, should
consider the diagnostic possibility that AF is related to the presence of ischaemic disease. AF can be
considered as an anginal equivalent in patients who meet the three conditions: being male, with hypertension
and DM.
The supply of water to populations is a basic need that has been threatened more frequently in recent years due to climate change, which renders seeking other sources of water essential. The hydrochemistry of the groundwater of the aquifer located in the UTP Tocumen was characterized by previous research to determine its possible use as a source of drinking water and irrigation water. The objective of this study is to characterize the soil and rock hosting the aquifer to acquire more information about them with a view to possibly exploit an alternative source of drinking water. To this end, a 10-m-depth survey was conducted to obtain soil and rock samples from the area, and to characterize geotechnical and geochemical parameters. 2D electrical resistivity tomography was used to create a lithological model of the aquifer and to correlate the data. Soil is residual of the technosol type, considered permeable with a transmissivity level that favors rainwater infiltration, followed by the soil–rock interface, where rock is weathered. It´s followed by a sedimentary rock corresponding to marly siltstones with a certain degree of tectonic fractures that allow water infiltration and its accumulation in the rocks, constituting the aquifer. The 2D electrical resistivity suggests two water accumulations: a superficial and a deep one. There was a good correlation between the aquifer water’s chemistry and the rock geochemistry.
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