Search results for "MATERIA"

Evaluation of Glyphosate Ecotoxicity and Biodegradability in the Municipal Wastewaters

2018

Glyphosate (G) is a broad-spectrum systemic organophosphate herbicide being widely used to control weeds in agricultural fields and urban areas. Its safety for both human health and aquatic biomes is a subject of wide debate. This study was aimed at evaluating the removal efficiency and ecotoxicity of G based herbicide (GBH) Klinik® (Nufarm, Austria) added to the raw municipal wastewater (WW) in a lab-scale model column system. The effect of oxide ceramics as a filtering medium (treatment „B”), as well as activated sludge and nutrients (treatment „C”) was compared with the control columns, which contained only WW (treatment „A”). After 72h treatment of WW spiked with 100 mg/L G, the lowest …

Evaluation of Sewage Sludge for Further Nutrient Conservation

2020

Conversion of organic-containing sludges to a high value fertilizer is considered to be a rational solution from a recycling point of view. Aerobic respiration could serve as an indicator of stability and maturity of the treated sewage sludge (SS). The aim of this study was to characterize two SS samples, obtained from different wastewater treatment plants („D” and „J”), i.e, at the initial stage of treatment, alone and with amendments. Two methods for estimation of microbial respiration, as well as dehydrogenase activity were used. The SS-J demonstrated the higher microbial biodegradation activity, as compared to SS-D. In experiments with OxiTop® device, statistically significant (p<0.0…

Prediction of Difficult Tracheal Videolaryngoscopic Intubation Using El-Ganzouri Risk Index

2017

Summary Introduction. Unanticipated difficult intubation still exists as a significant problem. El-Ganzouri risk index is a bedside difficult airway evaluation method, which can help determine risk of difficult airways. However, evidence of using of El-Ganzouri risk index in difficult laryngeal visualisation using videolaryngoscopes is limited. Aim of the Study. Determine the specificity and sensitivity of El-Ganzouri multivariate risk index to predict difficult laryngeal exposure using Storz C-MAC videolaryngoscope equipped with D type blade. Material and methods. We conducted a study of 29 patients, which were examined using El-Ganzouri risk index before induction of anaesthesia. After in…

Cuidado respiratorio en COVID-19

2020

Resumen Antecedentes El COVID-19 forma parte de la familia de los virus conocida como Coronaviridae. El nuevo patogeno β-coronavirus del subgenero Sarbecovirus se denomino inicialmente como el nuevo coronavirus (2019-nCoV); fue identificado en un brote de neumonia en Wuhan. Los pacientes desarrollan alteraciones en el sistema respiratorio, pudiendo llegar a padecer neumonia severa, edema pulmonar o sindrome de dificultad respiratoria aguda. Objetivo Revisar la evidencia cientifica disponible relacionada con el cuidado del sistema respiratorio, estableciendo pautas generales de tratamiento. Metodos Revision narrativa de la literatura. Se realizo una busqueda, seleccion y revision de articulo…

Development of a fast characterization setup for radionuclide generators demonstrated by a 227Ac-based generator

2021

Abstract The development of a setup for a fast online characterization of radionuclide generators is reported. A generator utilizing the mother nuclide 227Ac sorbed on a cation exchange resin is continuously eluted by using a peristaltic pump. To allow continuous and pulse-free elution of a large volume over extended time periods a 3D-printed interface designed to remove pressure-oscillations induced by the pump was placed between pump and generator column to ensure undisturbed generator elution. The eluate of the generator is passed through a 3D printed flow cell placed inside a borehole Na(Tl)-scintillation detector for high counting efficiency. Alternatively, a HPGe detector suitable for…

Recent advances of the multipactor RF breakdown in RF satellite microwave passive devices

2016

The main goal of this work is the review of the recent advances in the study of the multipactor RF breakdown phenomenon in RF satellite microwave passive devices for space telecommunication applications developed in the Val Space Consortium. In this work several topics related with the multipactor phenomenon will be discussed.

Simple eddy current compensation by additional gradient pulses

2018

Electronic processes in doped ZnO nanopowders

2019

The financial support of research grants ERA.NET RUS_ST20170-051 and SFERA II project “Transnational Access activities” (EU 7th Framework Programme Grant Agreement N312643). This work was partly supported by the Russian Foundation for Basic Research, project no. 18-52-76002.

Pulsed Electric Field Processing of Fruit Juices

2018

Abstract Fruit juices and other liquid foods constitute an important source of bioactive compounds. However, the techniques used for their processing may cause alterations in their contents, and consequently they do not provide the benefits expected by the consumer. This fact has led to the increasing use of nonthermal processing technologies, such as pulsed electric field (PEF), which have been developed over recent decades as alternative technologies to thermal pasteurization of liquid foods. Researchers have previously studied the effects of PEF on the main compounds affecting the quality and the health-related properties. The reported results show that PEF could be used to pasteurize fr…

La grève ouvrière chez Léon de Seilhac : de l’enquête à l’écriture

2017

Parmi toutes les raisons qui justifient la lecture des nombreux recits que Leon de Seilhac a consacres aux classes ouvrieres de la Belle Epoque, beaucoup concernent directement les textes consacres aux greves. En premier lieu, le lecteur contemporain est immediatement frappe par les enquetes qu’il conduit, supposant par consequent une interlocution avec les differents acteurs des conflits ; Seilhac est par ailleurs le temoin et l’observateur d’un certain nombre de conflits sociaux majeurs de l’epoque, et en general d’un intense moment de conflictualite ouvriere a l’echelle nationale et europeenne. Il se montre enfin attentif aux territoires, aux acteurs et aux repertoires d’action qui carac…