Fired products of Cr-smectite clays in nitrogen

The products of Cr-smectite clays heated to 1350 °C in nitrogen were evaluated by X-ray diffraction and chemical analysis. Cr-smectite clays were prepared at room temperature by contact between smectite clays and Cr species contained in OH-Cr solutions. The Cr species were prepared using chromium nitrate solution by addition of NaOH solution with OH/Cr = 2. Products of firing in nitrogen at the high temperature were different (magnesia chromite, donathite, iron chromium oxide and picrochromite) depending on the type of isomorphous substitution of the smectite structure and the amount of retained chromium.Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - (CETMIC

Epidemiology of intra-abdominal infection and sepsis in critically ill patients: “AbSeS”, a multinational observational cohort study and ESICM Trials Group Project

Purpose: To describe the epidemiology of intra-abdominal infection in an international cohort of ICU patients according to a new system that classifies cases according to setting of infection acquisition (community-acquired, early onset hospital-acquired, and late-onset hospital-acquired), anatomical disruption (absent or present with localized or diffuse peritonitis), and severity of disease expression (infection, sepsis, and septic shock). Methods: We performed a multicenter (n = 309), observational, epidemiological study including adult ICU patients diagnosed with intra-abdominal infection. Risk factors for mortality were assessed by logistic regression analysis. Results: The cohort included 2621 patients. Setting of infection acquisition was community-acquired in 31.6%, early onset hospital-acquired in 25%, and late-onset hospital-acquired in 43.4% of patients. Overall prevalence of antimicrobial resistance was 26.3% and difficult-to-treat resistant Gram-negative bacteria 4.3%, with great variation according to geographic region. No difference in prevalence of antimicrobial resistance was observed according to setting of infection acquisition. Overall mortality was 29.1%. Independent risk factors for mortality included late-onset hospital-acquired infection, diffuse peritonitis, sepsis, septic shock, older age, malnutrition, liver failure, congestive heart failure, antimicrobial resistance (either methicillin-resistant Staphylococcus aureus, vancomycin-resistant enterococci, extended-spectrum beta-lactamase-producing Gram-negative bacteria, or carbapenem-resistant Gram-negative bacteria) and source control failure evidenced by either the need for surgical revision or persistent inflammation. Conclusion: This multinational, heterogeneous cohort of ICU patients with intra-abdominal infection revealed that setting of infection acquisition, anatomical disruption, and severity of disease expression are disease-specific phenotypic characteristics associated with outcome, irrespective of the type of infection. Antimicrobial resistance is equally common in community-acquired as in hospital-acquired infection

Fired products of Cr-smectite clays in nitrogen

The products of Cr-smectite clays heated to 1350 ° C in nitrogen were evaluated by X-ray diffraction and chemical analysis. Cr-smectite clays were prepared at room temperature by contact between smectite clays and Cr species contained in OH-Cr solutions. The Cr species were prepared using chromium nitrate solution by addition of NaOH solution with OH/Cr = 2. Products of firing in nitrogen at the high temperature were different (magnesia chromite, donathite, iron chromium oxide and picrochromite) depending on the type of isomorphous substitution of the smectite structure and the amount of retained chromium

Structural changes of Cr-beidellite treated up to 1350 °C in oxygen or nitrogen atmospheres

Abstract Beidellite clay mineral after intercalation of OH-Cr(III) species were thermally analyzed up to 1350 °C in oxygen and nitrogen atmospheres. OH-Cr-beidellite can be used as a pillared clay precursor for catalysis or as adsorbent applications. However, in this paper beidellite enriched in chromium were analyzed at different thermal treatments up to high temperature for evaluating structural changes for possible future ceramic applications. The structural changes were followed by thermal analysis and X-ray diffraction. The thermal treatment of OH-Cr-beidellite in oxygen and nitrogen atmospheres developed different mineralogical phases up to 1050 °C, but at higher temperatures, the same phases were developed in both atmosphere treatments. Eskolaite phase (Cr2O3) appeared in the sample after heating at 400 °C in oxygen atmosphere, whereas grimaldite (CrO-OH) in nitrogen atmosphere, maintaining the starting phases. At 1000 °C the raw clay minerals disappeared, as it is knew. At 1050 °C in nitrogen atmosphere, grimaldite was absent and eskolaite appeared. At 1350 °C in the samples calcined in both atmospheres, quartz, cristobalite and mullite as the main phases and in lower contents aluminum oxide and aluminum-chromium oxide [(Al,Cr)2O3] were present

Responsabilidad social de la universidad en la salud de la población rural

“Promoción y Educación para la Salud Social en Poblaciones Rurales” tiene como objetivos desarrollar acciones de salud comprendidas y compartidas por los diversos actores de la comunidad contribuyendo con la incorporación de hábitos saludables, identificación y diagnóstico de problemas sanitarios y colaborar en la provisión de medicamentos para el control de la equinococosis en las comunidades rurales del partido de Tandil. Posee financiamiento del Ministerio de Educación de la Nación y la participación de las Facultades de Ciencias Veterinarias y de Arte de la Universidad Nacional del Centro; dependencias gubernamentales de las áreas Salud y Educación de la Provincia de Buenos Aires y del Municipio de Tandil; el Rotary Club Tandil Norte y alumnos voluntarios de la universidad. La vinculación de la Universidad con su comunidad permite desarrollar prácticas en el área de Salud Pública. La transmisión de valores y actitudes en la educación superior fortalece la formación de profesionales socialmente responsables

Effects on the development of Spodoptera frugiperda feeding on diets spiked with Solanum sisymbriifolium extracts.

Made available in DSpace on 2020-11-10T09:18:41Z (GMT). No. of bitstreams: 1 Alexandre-specht-Effects.pdf: 514692 bytes, checksum: 5c98c57b2b71ee58612ddb1e4a07c486 (MD5) Previous issue date: 2020bitstream/item/217597/1/Alexandre-specht-Effects.pd

Residuos de plaguicidas en compartimentos ambientales.

RESUMEN.El objetivo de esta publicación es difundir los principales resultados del trabajo realizado en el marco del proyecto FPTA 324: Estudio del impacto de las actuales prácticas agrícolas en los recursos hídricos del bajo Rio Negro y Esteros de Farrapos. Las zonas estratégicas definidas en este proyecto -bajo Rio Negro (desde Mercedes aguasabajo) y Esteros de Farrapos, RÍo Uruguay- pretendieron establecer un diagnóstico y evaluación del riesgo por plaguicidas con influencia sobre el bioma de los ríos en relación a la incidencia de los cultivos extensivos existentes como ser la producción de soja

Antifeedant and repellent effects of neotropical Solanum extracts on drywood termites (Cryptotermes brevis, Isoptera: Kalotermitidae)

Abstract: Antifeedant and repellent effects of two different extracts from native Solanum species Solanum bistellatum and Solanum sisymbrifolium on Cryptotermes brevis were evaluated. The extracts obtained, particularly the dichloromethane extracts and the enriched fraction of sugar esters from S. sisymbrifolium and S. bistellaltum, showed antifeedant and repellent action against the termite. The antifeedant effect of dichloromethane extract from S. sisymbrifolium at the concentration of 25.00mg/mL reached 100%, while the repellent action of the dichloromethane extracts and that of the enriched fraction of sugar esters at the concentration of 1.00mg/mL was higher than 90%. In case of S. bistellatum, the antifeedant effect of the dichloromethane extract and the enriched fraction of sugar esters at the concentration of 25.00mg/mL was 43.29% and 57.46%, respectively. The repellent action of the dichloromethane extracts and of the enriched fraction of sugar esters at a concentration level of 2.50mg/mL was higher than 92%