Search results for "vih"
showing 10 items of 255 documents
Carbons from second generation biomass as sustainable supports for catalytic systems
2018
In this study activated carbons were produced from the wood of three different wood species (pine, birch, spruce). The resulting activated carbons were characterized in bulk for ash content, carbon content (elemental analyses), specific surface area, and pore size distribution, and at the surface by measuring the autogenerated pH and studying their structure by XPS. All the samples presented high surface areas and appeared to be mesoporous materials (mesopores >80%). The carbons were then used as support for AuPt nanoparticles and tested in the liquid phase oxidation of glycerol (GLY) and in the hydrogenation of levulinic acid (LA), two important chemicals from cellulose-based biomass. The …
Vitamin D supplementation, bone turnover, and inflammation in HIV-infected patients
2018
IF 1.307 (2017); International audience; ObjectiveTo assess whether vitamin D supplementation could be associated with a modification of inflammatory markers and bone turnover in HIV-1-infected patients.Patients and methodsPatients who participated in an initial survey in 2010 and who were followed in the same department were included in a new study in 2012. Between 2010 and 2012, vitamin D supplementation was offered to patients presenting with hypovitaminosis D as per appropriate guidelines. Clinical examinations were performed, and fasting blood samples were taken for inflammation and bone marker evaluations.ResultsOf the 263 patients who participated in the 2010 study, 198 were included…
Duck Hepatitis B Virus Requires Cholesterol for Endosomal Escape during Virus Entry
2008
ABSTRACT The identity and functionality of biological membranes are determined by cooperative interaction between their lipid and protein constituents. Cholesterol is an important structural lipid that modulates fluidity of biological membranes favoring the formation of detergent-resistant microdomains. In the present study, we evaluated the functional role of cholesterol and lipid rafts for entry of hepatitis B viruses into hepatocytes. We show that the duck hepatitis B virus (DHBV) attaches predominantly to detergent-soluble domains on the plasma membrane. Cholesterol depletion from host membranes and thus disruption of rafts does not affect DHBV infection. In contrast, depletion of chole…
The Datafication of Hate: Expectations and Challenges in Automated Hate Speech Monitoring.
2020
Laaksonen, S-M.; Haapoja, J.; Kinnunen, T., Nelimarkka, M. & Pöyhtäri, R. (2020, accepted). . Frontiers in Big Data: Data Mining and Management / Critical Data and Algorithm Studies. doi:10.3389/fdata.2020.00003 Hate speech has been identified as a pressing problem in society and several automated approaches have been designed to detect and prevent it. This paper reports and reflects upon an action research setting consisting of multi-organizational collaboration conducted during Finnish municipal elections in 2017, wherein a technical infrastructure was designed to automatically monitor candidates' social media updates for hate speech. The setting allowed us to engage in a 2-fold investiga…
Prevalence of oral lesions in HIV patients related to CD4 cell count and viral load in a Venezuelan population
2006
Objetivo: Determinar la prevalencia de las lesiones bucales en un grupo de pacientes VIH+, su relación con el contaje de linfocitos CD4 y la carga viral, en una muestra de la población venezolana Materiales y métodos: En el presente estudio se evaluaron 75 pacientes adultos VIH+, provenientes del Centro para la Atención de Pacientes con Enfermedades Infectocontagiosas de la Facultad de Odontología de la Universidad Central de Venezuela. Cada uno de ellos fue examinado clínicamente para la detección de las lesiones presentes en la mucosa bucal. Igualmente se les determinó el contaje de células CD4+ mediante citometría de flujo, así como la carga viral mediante la técnica TR-RCP (Transcriptas…
Large stocks of peatland carbon and nitrogen are vulnerable to permafrost thaw
2020
Significance Over many millennia, northern peatlands have accumulated large amounts of carbon and nitrogen, thus cooling the global climate. Over shorter timescales, peatland disturbances can trigger losses of peat and release of greenhouses gases. Despite their importance to the global climate, peatlands remain poorly mapped, and the vulnerability of permafrost peatlands to warming is uncertain. This study compiles over 7,000 field observations to present a data-driven map of northern peatlands and their carbon and nitrogen stocks. We use these maps to model the impact of permafrost thaw on peatlands and find that warming will likely shift the greenhouse gas balance of northern peatlands. …
“Construir la poesía como una enfermedad de la piel”. HIV/AIDS representation in democratic Spain
2020
El presente ensayo tiene como objeto de estudio la representación de los enfermos de VIH/sida en la poesía española contemporánea. Su propósito principal es acercarnos a una realidad tan marginada como el sida a partir de los diferentes testimonios que recogió el discurso lírico. Asimismo, con el fin de atender a las variaciones que se produjeron en dicho discurso, en relación con la evolución de la enfermedad en el contexto español, este ensayo esbozará una panorámica de aquellas obras y composiciones, escritas en las diversas lenguas del Estado español: castellano, gallego, catalán y vasco, que abordaron esta cuestión entre las últimas décadas del siglo XX y los primeros años del siglo XX…
CH4 oxidation in a boreal lake during the development of hypolimnetic hypoxia
2020
AbstractFreshwater ecosystems represent a significant natural source of methane (CH4). CH4 produced through anaerobic decomposition of organic matter (OM) in lake sediment and water column can be either oxidized to carbon dioxide (CO2) by methanotrophic microbes or emitted to the atmosphere. While the role of CH4 oxidation as a CH4 sink is widely accepted, neither the magnitude nor the drivers behind CH4 oxidation are well constrained. In this study, we aimed to gain more specific insight into CH4 oxidation in the water column of a seasonally stratified, typical boreal lake, particularly under hypoxic conditions. We used 13CH4 incubations to determine the active CH4 oxidation sites and the …
Variabilidad genética de la infección por VIH en usuarios de drogas
2002
El uso de drogas por vía intravenosa (UDI) constituye una causa importante de trans¬misión del VIH en los países industrializados, habiéndose descrito en los últimos años la aparición de una serie de recombinantes intersubtipo, que se han extendido con rapidez entre ellos y que pueden afectar al diagnóstico y al tratamiento y por tanto al seguimiento de los pacientes, denominadas formas recombinantes circulantes (FRC). Es necesario tener en cuenta sus características para el mejor conocimiento de la epidemiología del VIH en los UDIs.
Revista española de drogodependencias
2008
Resumen tomado de la publicación La mejor estrategia para prevenir la expansión del VIH-SIDA es la prevención. Son bien conocidas las medidas de prevención, de las que se han realizado una enorme difusión. La transmisión del VIH-SIDA por inaplicación de las medidas de prevención por personas afectadas de modo deliberado y sin comunicación del estado serológico comporta, según diversas sentencias de nuestros Tribunales, sanciones penales o civiles. No obstante, hay que tener en cuenta las circunstancias de las personas en estado de intoxicación por consumo de drogas y alcohol y el consentimiento de la persona que se expone a la transmisión del virus, puesto que podría dar lugar a exoneración…