Results: 1740

Dinámica de raíces finas y su relación con la fertilidad edáfica en bosques pluviales tropicales del Chocó biogeográfico colombiano

Rev. biol. trop; 64 (4), 2016
Resumen:Las raíces finas juegan un papel importante en la adquisición de agua y minerales del suelo, el balance global del carbono y la mitigación del cambio climático. La dinámica (productividad-PRF y recambio-RRF) de raíces finas es esencial para el ciclo de nutrientes y balance de carbono de los...

Efecto letal agudo de los insecticidas en formulación comercial Imidacloprid, Spinosad y Thiocyclam hidrogenoxalato en obreras de Bombus atratus (Hymenoptera: Apidae)

Rev. biol. trop; 64 (4), 2016
Resumen:Los efectos de los insecticidas sobre las abejas han cobrado gran atención a nivel mundial, sin embargo, son pocos los estudios sobre el efecto de estos agroquímicos en abejas Neotropicales. Bombus atratus es una especie neotropical, distribuida ampliamente en los Andes y es considerado un poli...

Total protein composition of young and adult Biomphalaria alexandrina snails with different compatibilities to Schistosoma mansoni infection

Rev. biol. trop; 64 (4), 2016
Abstract:Schistosomiasis remains a disease of major global public health concern since it is a chronic and debilitating illness. The widely distributed Schistosoma mansoni that causes intestinal schistosomiasis represents a great threat. Its world-wide distribution is permitted by the broad geographic ra...

Anaerobic microbiota: spatial-temporal changes in the sediment of a tropical coastal lagoon with ephemeral inlet in the Gulf of Mexico

Rev. biol. trop; 64 (4), 2016
Abstract:Sulfate-reducing bacteria (SRB) and methanogenic archaea (MA) share common niches in coastal sediments during the terminal phases of the anaerobic mineralization of organic matter. The purpose of this study was to analyze the spatial - temporal variation of SRB and MA in the sediments of a tropi...

One year weekly dynamics of limnological conditions and phytoplankton in Lake Bonilla, Costa Rica

Rev. biol. trop; 64 (4), 2016
Abstract:The detailed response of tropical lake phytoplankton to weather variations has been little studied, but it seems that composition varies in response to rain and wind variability over the course of the year. In order to gather more evidence on this variation, the weekly variability of phytoplankt...

Serum Klotho (but not haplotypes) associate with the post-myocardial infarction status of older adults

Clinics; 71 (12), 2016
OBJECTIVES: The number of deaths from vascular diseases is incredibly high worldwide, and reliable markers for major events are still needed. The current cross-sectional study investigated the association of Klotho haplotypes and Klotho serum levels with classic risk factors and a clinical history of vas...

Passive acquisition of anti-Staphylococcus aureus antibodies by newborns via transplacental transfer and breastfeeding, regardless of maternal colonization

Clinics; 71 (12), 2016
OBJECTIVE: To investigate the transmission of anti-Staphylococcus aureus (Sa) IgG, IgG1 and IgG2 via placental transfer and the transfer of IgA via the colostrum according to maternal Sa carrier status at delivery. METHODS: We evaluated anti-Sa IgG, IgG1 and IgG2 in maternal and cord sera and IgA in col...

Correlation between the histopathology of chronic urticaria and its clinical picture

An. bras. dermatol; 91 (6), 2016
Abstract BACKGROUND: Chronic urticaria is characterized by transient, pruritic lesions of varying sizes, with central pallor and well-defined edges, with disease duration longer than six weeks. Its cellular infiltrate consists of neutrophils, lymphocytes and eosinophils. There is a subgroup of patients ...

Exome sequence analysis of Kaposiform hemangioendothelioma: identification of putative driver mutations

An. bras. dermatol; 91 (6), 2016
Abstract BACKGROUND: Kaposiform hemangioendothelioma is a rare, intermediate, malignant tumor. The tumor's etiology remains unknown and there are no specific treatments. OBJECTIVE: In this study, we performed exome sequencing using DNA from a Kaposiform hemangioendothelioma patient, and found putative ...