Supercritical CO2 Processing of White Grape Must as a Strategy to Reduce the Addition of SO2.

In winemaking, sulfur dioxide addition is the most common procedure to prevent enzymatic and microbial alterations. However, the enological industry looks for safer alternatives to preserve enological products, and high-pressure treatments with supercritical CO2 are a suitable alternative. This study evaluates the effectiveness of this process in the stabilization and preservation of white grape must, studying the influence of time, pressure, and CO2 percentage on must characteristics. In spite of the percentage of CO2 turned out to be the variable that affects the most the process, no remarkable differences were observed in pH, acidity, and color intensity between untreated and treated musts. Moreover, this technique has proven to be very efficient in the reduction of aerobic mesophilic microorganisms as well as in the reduction of residual polyphenol oxidase activities, being lower than those obtained with SO2 addition (60 and 160 mg/L). Based on the results, the most convenient conditions were 100 bar and 10% CO2, for 10 min treatment.

Functional, Physical, and Volatile Characterization of Chitosan/Starch Food Films Functionalized with Mango Leaf Extract.

Active packaging is one of the currently thriving methods to preserve highly perishable foods. Nonetheless, the integration of active substances into the formulation of the packaging may alter their properties-particularly mass transfer properties-and therefore, the active compounds acting. Different formulations of chitosan (CH), starch (ST), and their blends (CH-ST), with the addition of mango leaf extract (MLE) have been polymerized by casting to evaluate their food preservation efficiency. A CH-ST blend with 3% MLE using 7.5 mL of the filmogenic solution proved to be the most effective formulation because of its high bioactivity (ca. 80% and 74% of inhibition growth of S. aureus and E. coli, respectively, and 40% antioxidant capacity). The formulation reduced the water solubility and water vapor permeability while increasing UV protection, properties that provide a better preservation of raspberry fruit after 13 days than the control. Moreover, a novel method of Headspace-Gas Chromatography-Ion Mobility Spectrometry to analyze the volatile profiles of the films is employed, to study the potential modification of the food in contact with the active film. These migrated compounds were shown to be closely related to both the mango extract additions and the film's formulation themselves, showing different fingerprints depending on the film.

Supercritical Impregnation of Mango Leaf Extract into PLA 3D-Printed Devices and Evaluation of Their Biocompatibility with Endothelial Cell Cultures.

The addition of natural substances with pharmacoactive properties to polymeric biomedical devices would provide beneficial regarding the assimilation of these endoprostheses when implanted into a patient's body. The added drug would facilitate endothelization by regulating the inflammatory processes that such interventions entail, preventing contamination hazards and favoring the angiogenesis or formation of blood vessels in the tissue. The present work used mango leaf extract (MLE) obtained through pressurized ethanol for this purpose. Polylactic acid (PLA) in the form of filaments or 3D-printed disks was impregnated by means of supercritical technology with MLE for the culture essays. The release kinetics has been studied and the polymer matrices have been examined by scanning electron microscopy (SEM). The impregnated devices were subjected to in vitro culture of colony-forming endothelial cells. The influence of the different impregnation conditions used for the production of the MLE impregnated polymeric devices on the development of the cell culture was determined by fluorescence microscopy. The best results were obtained from the calcein cultures on 35 °C MLE impregnated into 3D-printed polymer disks.

Supercritical Impregnation of PLA Filaments with Mango Leaf Extract to Manufacture Functionalized Biomedical Devices by 3D Printing.

Polylactic Acid (PLA) filaments impregnated with ethanolic mango leaves extract (MLE) with pharmacological properties were obtained by supercritical impregnation. The effects of pressure, temperature and amount of extract on the response variables, i.e., swelling, extract loading and bioactivity of the PLA filaments, were determined. The analysis of the filaments biocapacities revealed that impregnated PLA filaments showed 11.07% antidenaturant capacity and 88.13% antioxidant activity, which after a 9-day incubation shifted to 30.10% and 9.90%, respectively. Subsequently, the same tests were conducted on printed samples. Before their incubation, the printed samples showed 79.09% antioxidant activity and no antidenaturant capacity was detected. However, after their incubation, the antioxidant activity went down to only 2.50%, while the antidenaturant capacity raised up to 23.50%. The persistence of the bioactive properties after printing opens the possibility of using the functionalized PLA filaments as the feed for a three-dimensional (3D) printer.

Neumoperitoneo secundario a neumatosis quística intestinal asociado a inhibidores de la tirosina quinasa / A pneumoperitoneum due to intestinal cystic pneumatosis associated with a tyrosine kinase inhibitor

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A pneumoperitoneum due to intestinal cystic pneumatosis associated with a tyrosine kinase inhibitor.

Pneumatosis cystoides intestinalis is characterized by multiple air-filled cysts in the intestine wall. A perforation causes pneumoperitoneum, frequently with minimal clinical affectation and do not require surgery at first in most cases. Recently, some cancer treatments, mainly molecular targeted therapy, have been associated with this complication. For this reason, radiologic findings of intestinal pneumatosis and/or secondary perforation during patient follow-up should be carefully interpreted. The clinical-analytical findings should always be considered. We report a case associated with the use of tyrosine kinase inhibitors in order to illustrate this point.

Proctitis y abscesos perirrectales: ¿algo más en qué pensar? / Proctitis and perirectal abscesses: is there anything else to think about?

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Proctitis and perirectal abscesses: is there anything else to think about?

Lymphogranuloma venereum (LGV) is a condition caused by invasive serovars of Chlamydia trachomatis. The classical inguinal presentation that is characterized by the development of transient genital ulcer(s) and inguinal or femoral lymphadenopathy has decreased in our environment. At present, infection by this bacterium has emerged as an important cause of proctitis and proctocolitis in men who have sex with other men. We report the case of a homosexual man with acute proctitis that was complicated by a perirectal abscess secondary to a Chlamydia trachomatis infection.

Tumor carcinoide gástrico como causa rara de anemia ferropénica / Gastric carcinoid tumor as an infrequent cause of ferropenic anemia

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Recurrencia del tumor ovárico de las células de la granulosa / Recurrence of ovarian granulosa cell tumor

Presentamos el caso de una mujer de 79 años, con antecedentes de un supuesto fibroma ovárico, que comienza con un cuadro de dolor en fosa ilíaca izquierda y leucocitosis, siendo diagnosticada de diverticulitis. Durante el estudio, incidentalmente se descubre una masa en la pared abdominal anterior que resultó ser una recidiva de un tumor de células de la granulosa. Realizamos una revisión bibliográfica de esta patología centrándonos, fundamentalmente, en sus aspectos clínicos y terapéuticos. Se trata de una neoplasia muy poco frecuente, sobre la que hay pocos estudios, que se caracteriza por su larga historia natural y su tendencia a recurrir años después del diagnóstico (AU)

We present the case of a 79-year-old woman who was misdiagnosed with an ovarian fibroma 5 years previously. The patient presented with pain in the right iliac fossa with leukocytosis and was diagnosed with diverticulitis. A mass was incidentally found in the anterior abdominal wall, which was later confirmed as metastasis from a granulosa cell tumor of the ovary. We provide a literature review, focussing on the clinical findings and treatment of this tumor. Few reports have been published of this uncommon entity, characterized by a long natural history and tendency to recur years after the initial diagnosis (AU)