Influencia de herbicidas sobre la micota queratinolítica de los suelos

Para observar los efectos de ciertos agroquímicos sobre la micota quetatinolítica de los suelos, se realizaron aplicaciones de Metribuzin, Atrazina y Alachlor, en las dosis habituales, a parcelas de terreno de suelos de pradera.Se estudiaron las modificaciones que a través del tiempo se producían en los aislamientos de estos hongos geofílicos. Algunas de las cepas fueron inhibidas al comienzo del tratamiento, pero al cabo de los 60 días, todas ellas se recuperaron a partir de los suelos tratados. Se comprobó que estos agroquímicos produjeron cambios en el metabolismo de la especie más aislada: Microsporum fulvum, atribuyéndose estas observaciones a una selección realizada por los herbicidas, de cepas más resistentes a los mismo

Influencia del sustrato queratinoso de suelos de pradera sobre la colonización por dermatofitos geofílicos

Se realizó el aislamiento de cepas queratinolíticas en. suelos de pradera de cuatro sectores lindantes entre sí, destinados a: 1) cultivos alternantes de trigo y soja; 2) potreros con ganado vacuno y caballar; 3) corral de aves y 4) corral de cerdos.De los resultados obtenidos en muestras de potreros y corrales, se aprecia una marcada selección de las especies queratinolíticas, aparentemente condicionadas al tipo de sustrato queratinoso aportado por los distintos animales. En suelos de porquerizas, hay un predominio de Keratinomyces ajelloi, mientras que en los correspondientes a potreros, tiene la mayor frecuencia el complejo Microsporum gypseum y sus teleomorfos. En corral de aves, Arthroderma ciferril y su anamorfo fueron aislados por primera vez en nuestro país.Cabe destacar que en suelos destinados a cultivos, sin el especial aporte queratinoso, todas las muestras presentaron desarrollo de K. ajelloi

Queratinolisis por microsporum fulvum. Uriburu

Se determina la actividad queratinolitica de cepas de microsporum fulvum aisladas de suelos de praderas, cuando se desarrollan sobre um substrato queratinoso, con y sin aplicación de los herbicidas preemergente

Influencia de herbicidas preemergentes sobre el desarrollo de dermatofitos geofílicos en suelos agrícolas

El objetivo de este trabajo es conocer la acción ejercida por concentraciones crecientes de herbicidas de presiembra (Metrlbuzin, .Atrazina y Alachlor) sobre el crecimiento y la capacidad germinativa de Microsporum fulvum, Microsporum gypseum y Keratinomyces ajello

Micetoma podal por fusarium solani (Mart.) Appel & Wollenweber

Se presenta un caso de micetoma de pie derecho, producido por fusarium solani, en un hombre de 24 años procedente del Chaco. La infección se produjo debido a una lesión con una astilla de quebracho.La determinación del agente causal fue realizada en muestras seriadas (biopsias y secreciones) por el estudio de los gránulos, exámenes directos, coloraciones y caracteres culturales en medio de Agar Sabouraud-glucosa, Agar Sabouraud cloranfenicol, Agar extracto de Malta y Cerebro Corazón.Se considera a fusarium solani y otros especies del género, como raros agentes productores de micetoma, pero las cepas con capacidad de crecer a elevadas temperaturas y las circunstancias apropiadas en hospedador, permiten su adaptación al ambiente tisular y el inicio de esta micosis

Design, characterization and in vitro evaluation of antifungal polymeric films

The objective of the present paper was the development and the full characterization of antifungal films. Econazole nitrate (ECN) was loaded in a polymeric matrix formed by chitosan (CH) and carbopol 971NF (CB). Polyethylene glycol 400 and sorbitol were used as plasticizing agents. The mechanical properties of films were poorer when the drug was loaded, probably because crystals of ENC produces network outages and therefore reduces the polymeric interactions between the polymers. Polymers–ECN and CH–CB interactions were analyzed by Fourier-transform infrared spectroscopy (FTIR), thermal gravimetry analysis, and differential thermal analysis (DTA-TGA). ECN did not show structure alterations when loaded into the films. In scanning electron microphotographs and atomic force microscopy analysis, films prepared with CB showed an evident wrinkle pattern probably due to the strong interactions between the polymers, which were observed by FTIR and DTA-TGA. The in vitro activity of the formulations against Candida krusei and Candida parapsilosis was twice as greater as the commercial cream, probably as a result of the antifungal combination of the drug with the CH activity. All these results suggest that these polymeric films containing ECN are potential candidates in view of alternatives dosages forms for the treatment of the yeast assayed.Fil: Real, Daniel Andres. Universidad Nacional de Rosario; ArgentinaFil: Martinez, Maria V.. Universidad Nacional de Rosario; ArgentinaFil: Frattini, Agustin Lujan. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; ArgentinaFil: Soazo, Marina del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaFil: Luque, Alicia G.. Universidad Nacional de Rosario; ArgentinaFil: Biasoli, Marisa S.. Universidad Nacional de Rosario; ArgentinaFil: Salomon, Claudio Javier. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaFil: Olivieri, Alejandro Cesar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaFil: Leonardi, Darío. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentin

Intergroup Emotions, Perceived Threats and Hostility against Foreigners: Comparing Brazil, Portugal, and Spain

This study analyzed whether hostility towards foreigners perceived as competitors in the labor market would be related to the perception of threat (symbolic and economic) and negative intergroup emotions. 270 people between 18 and 63 years participated. In Brazil (N = 89), mostly men (59%) and average age 32.5 years; In Portugal (N = 87), mostly men (56.3%) and average age 39.9 years; in Spain (N = 94), mostly women (53.2%) and average age of 32.8 years. The results (t-test, analysis of variance and multiple regressions) indicated that in Spain negative emotions are associated with less hostility towards immigrants; In Brazil, positive emotions are associated with hostile attitudes. In Portugal, the relationship between positive emotions and hostility is positive, but not signifi cant. The symbolic threat was the best predictor of hostility only in the Brazilian sample. Positive emotions predispose to a greater kindness towards foreigners in the three countries. The main conclusion of the study is that the economic crisis does not seem to be associated with the perception of competitiveness of foreigners in the local labor market and hostility towards this social group.O estudo analisou se a hostilidade para com estrangeiros percebidos como concorrentes no mercado de trabalho estaria relacionada com a percepção de ameaça (simbólica e econômica) e as emoções intergrupais negativas. Participaram 270 pessoas entre 18 e 63 anos, assim distribuídas: Brasil (N = 89), idade média de 32.5 anos, maioria de homens (59%); Portugal (N = 87), idade média de 39.9 anos, maioria de homens (56.3%); e Espanha (N=94), idade média de 32.8 anos, maioria de mulheres (53.2%). Os resultados do Teste-t, análise da variância e regressões múltiplas indicaram que enquanto na Espanha emoções negativas se associam a menos hostilidade para com imigrantes, no Brasil é a expressão de emoções positivas que se encontra associada a tais atitudes hostis. Em Portugal a relação entre emoções positivas e hostilidade é positiva, mas não signifi cativa. A ameaça simbólica foi o melhor preditor de hostilidade somente na amostra brasileira. Emoções positivas predizem maior amabilidade para com estrangeiros nas amostras dos três países. A principal conclusão do estudo é que a crise econômica não parece estar associada com a percepção de competitividade do estrangeiro no mercado de trabalho local e a hostilidade para com este grupo social.info:eu-repo/semantics/publishedVersio

Wage inequality, segregation by skill and the price of capital in an assignment model

Some pieces of empirical evidence suggest that in the U.S., over the last few decades, (i) wage inequality between-plants has risen much more than wage inequality within-plants and (ii) there has been an increase in the segregation of workers by skill into separate plants. This paper presents a frictionless assignment model in which these two features can be explained simultaneously as the result of the decline in the relative price of capital. Additional implications of the model regarding the skill premium and the dispersion in labor productivity across plants are also consistent with the empirical evidence. [resumen de autor

Burden of non-communicable diseases among adolescents aged 10–24 years in the EU, 1990–2019: a systematic analysis of the Global Burden of Diseases Study 2019

Background Disability and mortality burden of non-communicable diseases (NCDs) have risen worldwide; however, the NCD burden among adolescents remains poorly described in the EU. Methods Estimates were retrieved from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019. Causes of NCDs were analysed at three different levels of the GBD 2019 hierarchy, for which mortality, years of life lost (YLLs), years lived with disability (YLDs), and disability-adjusted life-years (DALYs) were extracted. Estimates, with the 95% uncertainty intervals (UI), were retrieved for EU Member States from 1990 to 2019, three age subgroups (10–14 years, 15–19 years, and 20–24 years), and by sex. Spearman's correlation was conducted between DALY rates for NCDs and the Socio-demographic Index (SDI) of each EU Member State. Findings In 2019, NCDs accounted for 86·4% (95% uncertainty interval 83·5–88·8) of all YLDs and 38·8% (37·4–39·8) of total deaths in adolescents aged 10–24 years. For NCDs in this age group, neoplasms were the leading causes of both mortality (4·01 [95% uncertainty interval 3·62–4·25] per 100 000 population) and YLLs (281·78 [254·25–298·92] per 100 000 population), whereas mental disorders were the leading cause for YLDs (2039·36 [1432·56–2773·47] per 100 000 population) and DALYs (2040·59 [1433·96–2774·62] per 100 000 population) in all EU Member States, and in all studied age groups. In 2019, among adolescents aged 10–24 years, males had a higher mortality rate per 100 000 population due to NCDs than females (11·66 [11·04–12·28] vs 7·89 [7·53–8·23]), whereas females presented a higher DALY rate per 100 000 population due to NCDs (8003·25 [5812·78–10 701·59] vs 6083·91 [4576·63–7857·92]). From 1990 to 2019, mortality rate due to NCDs in adolescents aged 10–24 years substantially decreased (–40·41% [–43·00 to –37·61), and also the YLL rate considerably decreased (–40·56% [–43·16 to –37·74]), except for mental disorders (which increased by 32·18% [1·67 to 66·49]), whereas the YLD rate increased slightly (1·44% [0·09 to 2·79]). Positive correlations were observed between DALY rates and SDIs for substance use disorders (rs=0·58, p=0·0012) and skin and subcutaneous diseases (rs=0·45, p=0·017), whereas negative correlations were found between DALY rates and SDIs for cardiovascular diseases (rs=–0·46, p=0·015), neoplasms (rs=–0·57, p=0·0015), and sense organ diseases (rs=–0·61, p=0·0005)