ABSTRACT
The aim of this work was to study the effect of blanching and ultrasound pretreatments on drying and quality characteristics of apple peel. Blanching was conducted in boiling water, ultrasound in a water bath, and drying in a batch tray dryer. The product obtained was ground into a flour, and assessed for color, water activity, proximate composition, sugars, and bioactive compounds. Results showed that effective moisture diffusivity increases with a decrease in product moisture content, being such dependence well described by a second order polynomial model. Average drying rate was higher and product moisture content was lower for blanched and sonicated flour, especially for the former. Such result suggests that blanching and ultrasound enhance water removal during drying of apple peel. Physical properties were significantly affected by pretreatments, being more intense red color and lower water activity obtained for sonicated flour. Nutritional and bioactive properties were also significantly affected by pretreatments, being lower sugar, higher protein, fiber, catechin and epicatechin content observed for blanched flour. Summarizing, blanching and ultrasound pretreatments improve drying of apple peel, both regarding process efficiency and product quality.
Subject(s)
Malus , Flour , Desiccation/methods , Fruit , WaterABSTRACT
HMF (hydroxymethylfurfural), a compound that occurs naturally in food, is derived from the dehydration of monosaccharides (glucose and fructose) in products subjected to high-temperature treatments or to aging processes. HMF can be obtained by acid-catalyzed dehydration of lignocellulosic biomasses such as sugarcane bagasse and other agricultural residues. In this work, analytical quantification of HMF and furfural (the main co-product) was performed using high-performance liquid chromatography coupled with diode array detection (HPLC-DAD). The official method employs isocratic elution with a mobile phase composed of water and acetonitrile at a ratio of 80:20 (v/v). The analytical method proposed here was developed using 2,5-furandicarboxylic acid (FDCA) as internal standard, for the first time, with 0.01 mol L-1 trisodium citrate and ultrapure water as the mobile phase, adjusted to pH 2.5. The acidity of the mobile phase was required to avoid FDCA deprotonation. Good peak resolution and selectivity were obtained, without differences in the retention times of the analytes present in the standard solutions used to obtain the analytical curve and in the aqueous and organic phases from the synthesis of HMF using lignocellulosic biomass hydrolysis. The method complies with the current recommendations of AOAC regarding validation parameters.â¢The proposed HPLC method improves peak selectivity and resolution.â¢The method is suitable for acid sample media, such as aqueous and organic hydrolysis phases.â¢2,5-Furandicarboxylic acid (FDCA) was used as internal standard.
ABSTRACT
No disponible
Subject(s)
Humans , Male , Child , Retroperitoneal Neoplasms/complications , Shock, Cardiogenic/etiology , Paraganglioma/complications , Tomography, X-Ray Computed , Retroperitoneal Neoplasms/diagnosis , Paraganglioma/diagnosis , Radionuclide ImagingSubject(s)
Paraganglioma/complications , Retroperitoneal Neoplasms/pathology , Shock, Cardiogenic/etiology , Adolescent , Adrenergic alpha-1 Receptor Antagonists/administration & dosage , Adrenergic alpha-1 Receptor Antagonists/therapeutic use , Doxazosin/administration & dosage , Doxazosin/therapeutic use , Drug Therapy, Combination , Extracorporeal Membrane Oxygenation/methods , Humans , Labetalol/administration & dosage , Labetalol/therapeutic use , Male , Paraganglioma/drug therapy , Paraganglioma/surgery , Preoperative Care , Recurrence , Retroperitoneal Neoplasms/diagnostic imaging , Shock, Cardiogenic/diagnosis , Shock, Cardiogenic/therapy , Tomography, X-Ray Computed/methods , Treatment OutcomeABSTRACT
Este trabajo tiene como objetivo el análisis bibliométrico, descriptivo retrospectivo de la producción científica de la Revista Actividad Física y Ciencias. La muestra estuvo constituida por la producción de la revista en el período 2009-2018 (ambos inclusive). La búsqueda de información se realizó en noviembre de 2018. En el período considerado se publicaron en la revista un total de 19 números regulares y un número especial, 109 artículos con 245 firmantes (137 hombres y 108 mujeres). El intervalo de tiempo promedio para la espera en la recepción aceptación de los artículos es de 4,3 meses (con dispersiones); se publicaron trabajos procedentes de 20 países de varios continentes, siendo Venezuela el que tiene mayor presencia con 90, seguido de Brasil con 68, y la universidad con mayor cantidad de representaciones es la Universidad Pedagógica Experimental Libertador. Los trabajos "otros" (no corresponden a ejes temáticos declarados por la revista) son los que mayor producción tienen con un total de 25 artículos. La revista cuenta con 2396 referencias, con un promedio de 21,98 por artículo. La revista ha mantenido la periodicidad con una producción constante, alta y variada participación internacional e índice de colaboración.
The objective of this work is the bibliometric, descriptive and retrospective analysis of the scientific production of the Physical Activity and Science Journal. The sample was constituted by the production of the magazine during the period 2009-2018 (both inclusive). The information search was conducted in November 2018. During the period considered, a total of 19 regular issues and 1 special issue were published in the magazine 109 articles with 245 signatories (137 men and 108 women). The average time interval for waiting for the articles' reception acceptance is 4.3 months (with dispersions); works were published from 20 countries on several continents, with Venezuela having the largest presence with 90%, followed by Brazil with 68%, and the university with the largest number of representations is the Universidad Pedagógica Experimental Libertador. The "other" works (they do not correspond to thematic axes declared by the magazine) are those that have the highest production with a total of 25 articles. The magazine has 2396 references, with an average of 21.98 per article. The journal has maintained the periodicity with constant production, high and varied international participation and collaboration index
Subject(s)
Humans , Periodicals as Topic , Bibliometrics , Motor Activity , Venezuela , Retrospective Studies , Scientific Publication IndicatorsABSTRACT
INTRODUCTION: Previous studies have suggested that high volume hemofiltration (HVHF) may contribute to revert hypotension in severe hyperdynamic septic shock patients. However, arterial pressure stabilization occurs due to an increase in systemic vascular resistance, which could eventually compromise microcirculatory blood flow and perfusion. The goal of this study was to determine if HVHF deteriorates sublingual microcirculation in severe hyperdynamic septic shock patients. METHODS: This was a prospective, non-randomized study at a 16-bed, medical-surgical intensive care unit of a university hospital. We included 12 severe hyperdynamic septic shock patients (norepinephrine requirements > 0.3 µg/kg/min and cardiac index > 3.0 L/min/m2) who underwent a 12-hour HVHF as a rescue therapy according to a predefined algorithm. Sublingual microcirculation (Microscan for NTSC, Microvision Medical), systemic hemodynamics and perfusion parameters were assessed at baseline, at 12 hours of HVHF, and 6 hours after stopping HVHF. RESULTS: Microcirculatory flow index increased after 12 hours of HVHF and this increase persisted 6 hours after stopping HVHF. A similar trend was observed for the proportion of perfused microvessels. The increase in microcirculatory blood flow was inversely correlated with baseline levels. There was no significant change in microvascular density or heterogeneity during or after HVHF. Mean arterial pressure and systemic vascular resistance increased while lactate levels decreased after the 12-hour HVHF. CONCLUSIONS: The use of HVHF as a rescue therapy in patients with severe hyperdynamic septic shock does not deteriorate sublingual microcirculatory blood flow despite the increase in systemic vascular resistance.
Subject(s)
Hemofiltration/methods , Microcirculation/physiology , Mouth Floor/blood supply , Shock, Septic/physiopathology , Shock, Septic/therapy , Adult , Aged , Female , Humans , Male , Middle Aged , Prospective Studies , Tongue/physiology , Vascular Resistance/physiologyABSTRACT
Investigación realizada por el equipo dle Centro de Estudios Sanitarios y Sociales (CESS) de la Asociación Médica de Rosario, con el apoyo del programa de subvenciones a la investigación de la OPS
Subject(s)
Primary Health Care , Program Evaluation , ArgentinaABSTRACT
The authors intend to diagnose and make a prognosis in 97 patients surffering from sensoryneural hearing loss with a flat audiometric pattern. Combining this hearing loss with the hearing of the contralateral ear, seven different groups are abtained. The clinical records are searched for blood sedimentation rate, serologic tests for syphilis, eight nerve examination, ear X rays and when possible, fluctuations of hearing. When a vestibular lesion was found, this was mostly in the eat suffering from flat hearing loss. In most cases the hearing loss is either stable or gets worse. The most frequent diagnosis was endolinphatic hidrops
