Respuesta del rendimiento del maíz a fósforo, azufre y zinc en la provincia de Entre Ríos, Argentina

The nutrients that mainly condition the yields of extensive crops in Argentina are nitrogen and phosphorus, but the lack of replenishment and continuous agricultural activity have produced a decrease in the availability of other nutrients and could currently become limiting. These include zinc and sulfur. The use of fertilizers with only P and N at the sowing of the maize crop has been a traditional practice in the province of Entre Ríos. Currently other sources have valuesclose to their concentration in terms of these nutrients (P and N) and have S and Zn in their composition. With the objective of evaluating the effect of the application of P, S and Zn versus only P, 10 trials were carried out in producers' fields during three campaigns in different localities of the province of Entre Ríos, Argentina. In a joint analysis it was observed that the addition of P produced an increase in corn yield by 13% and a more complete fertilization (PSZn) by 21%, both treatments were statistically different from the control (p<0.05). When carrying out a contrast study between the traditional fertilization treatment (only with P) versus a more complete fertilization (PSZn) it yielded a p-value of 0.06, which leads us to conclude that there is a strong tendency to increase yield of corn with this fertilization.EEA ParanáFil: Pautasso, Juan Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná. Agencia de Extensión Rural Diamante; ArgentinaFil: Rotondaro, R. Asociación de Cooperativas Argentinas Coop. Ldta; Argentin

Disponibilidad de obra social en una población de adultos jóvenes con caries de la ciudad de La Rioja

La caries dental es una enfermedad crónica de origen multifactorial que afecta a los tejidos duros del diente con formación de una cavidad y pérdida de su función.Se piensa a nivel estatal y privado que una forma de combatir la caries es contar con una cobertura social

La caries dental y los factores relacionados en los adultos jóvenes de la ciudad de La Rioja.

La caries dental es una enfermedad crónica de origen multifactorial que afecta los tejidos duros del diente comienza por un proceso de desmineralización y por acción conjunta de las bacterias que se organizan en un biofilm acidógeno conducen con el tiempo a la formación de una cavidad en el diente con pérdida de su función. La caries dental ha sido poco estudiada en los adultos jóvenes. El objetivo de éste trabajo fue determinar la presencia de caries y los factores relacionados con la enfermedad en adultos jóvenes de la Ciudad de La Rioja. El diseño del estudio fue un corte transversal. El análisis estadístico se realizó con el paquete INFOSTA

Agricultural land use disrupts biodiversity mediation of virus infections in wild plant populations

Human alteration of natural habitats may change the processes governing species interactions in wild communities. Wild populations are increasingly impacted by agricultural intensification, yet it is unknown whether this alters biodiversity mediation of disease dynamics. We investigated the association between plant diversity (species richness, diversity) and infection risk (virus richness, prevalence) in populations of Plantago lanceolata in natural landscapes as well as those occurring at the edges of cultivated fields. Altogether, 27 P. lanceolata populations were surveyed for population characteristics and sampled for PCR detection of five recently characterized viruses. We find that plant species richness and diversity correlated negatively with virus infection prevalence. Virus species richness declined with increasing plant diversity and richness in natural populations while in agricultural edge populations species richness was moderately higher, and not associated with plant richness. This difference was not explained by changes in host richness between these two habitats, suggesting potential pathogen spill‐over and increased transmission of viruses across the agro‐ecological interface. Host population connectivity significantly decreased virus infection prevalence. We conclude that human use of landscapes may change the ecological laws by which natural communities are formed with far reaching implications for ecosystem functioning and disease

USE OF GAS CHROMATOGRAPHY ORAL CHROMA™ IN THE ASSESSMENT OF VOLATILE SULFUR COMPOUNDS FOR BREATH’S ANALYSIS IN ORAL AND GASTRIC AFFECTION

Introduction: Breathomics (Breath-based metabolomics) is a new biotechnology approach that allow us to diagnose some human diseases by the oral breath analysis.The method is based on the identi#cation and quanti#cation of volatile organic compound (VOC) in breath, by a new portable gas chromatography’s tools such as Oral Chroma®. This instrument is able to detect and quantify three different volatile sulfur compounds, VSC ( H2S, CH3S ,(CH3)2S) in 5 ml of oral breath, in fast time and with good analytical accuracy. In addition, different authors recently have been described as a comparative analysis of VSC could be useful in the diagnosis of different oral or systemic diseases such as: (i) oral tongue halitosis or/and gastric affection such as Helicobacter pylori infectio

Multi-device study of temporal characteristics of magnetohydrodynamic modes initiating disruptions

Disruptions in tokamaks are often preceded by magnetohydrodynamic (MHD) instabilities that can rotate or become locked to the wall. Measurements from magnetic diagnostics in the presence of MHD mode precursors to disruptions can yield potentially valuable input to the plasma control system, with a view to disruption avoidance, prediction and mitigation. This paper presents an exploratory analysis of the growth of MHD modes and corresponding time scales on the basis of magnetic measurements in multiple tokamaks. To this end, a database was compiled using disruptive discharges from COMPASS, ASDEX Upgrade, DIII-D and JET, manually classified according to disruption root cause, and characterized by a great diversity of operational conditions and mode dynamics. The typical time during which a mode can be detected using saddle coils and the duration of the locked mode phase in the database both extend over several orders of magnitude, but generally the time scales increase with plasma size. Several additional factors are discussed that can influence these durations, including the disruption root cause. A scaling law for the locked phase duration was estimated, yielding predictions toward ITER of the order of hundreds of milliseconds or even seconds. In addition, a scaling law for the mode amplitude at the disruption onset, proposed earlier by de Vries et al. (2016), is applied to the database, and its predictive capabilities are assessed. Despite significant uncertainty on the predictions from both scaling laws, encouraging trends are observed of the fraction of disruptions that may be detected with sufficient warning time to allow mitigation or even avoidance, based solely on observations of MHD mode dynamics. When combined with similar analysis of measurements from diagnostics that are sensitive to other disruption precursors, our analysis methods and results may contribute to the reliability, robustness and generalization of disruption warning schemes for ITER