Evaluation of Hungarian Wines for Resveratrol by Overpressured Layer Chromatography

A method, including solid phase extraction sample preparation, overpressured layer chromatographic separation and subsequent densitometric evaluation, was developed for measurement of total resveratrol (cis- and trans-isomers) content of wine. The amount of resveratrol was determined in wine samples from different winemaking regions of Hungary. The total resveratrol was high in Hungarian red wines (3.6–11 mg/L), and much lower in white ones (0.04–1.5 mg/L)

Goodbye Hartmann trial: a prospective, international, multicenter, observational study on the current use of a surgical procedure developed a century ago

Background: Literature suggests colonic resection and primary anastomosis (RPA) instead of Hartmann's procedure (HP) for the treatment of left-sided colonic emergencies. We aim to evaluate the surgical options globally used to treat patients with acute left-sided colonic emergencies and the factors that leading to the choice of treatment, comparing HP and RPA. Methods: This is a prospective, international, multicenter, observational study registered on ClinicalTrials.gov. A total 1215 patients with left-sided colonic emergencies who required surgery were included from 204 centers during the period of March 1, 2020, to May 31, 2020. with a 1-year follow-up. Results: 564 patients (43.1%) were females. The mean age was 65.9 ± 15.6 years. HP was performed in 697 (57.3%) patients and RPA in 384 (31.6%) cases. Complicated acute diverticulitis was the most common cause of left-sided colonic emergencies (40.2%), followed by colorectal malignancy (36.6%). Severe complications (Clavien-Dindo ≥ 3b) were higher in the HP group (P < 0.001). 30-day mortality was higher in HP patients (13.7%), especially in case of bowel perforation and diffused peritonitis. 1-year follow-up showed no differences on ostomy reversal rate between HP and RPA. (P = 0.127). A backward likelihood logistic regression model showed that RPA was preferred in younger patients, having low ASA score (≤ 3), in case of large bowel obstruction, absence of colonic ischemia, longer time from admission to surgery, operating early at the day working hours, by a surgeon who performed more than 50 colorectal resections. Conclusions: After 100 years since the first Hartmann's procedure, HP remains the most common treatment for left-sided colorectal emergencies. Treatment's choice depends on patient characteristics, the time of surgery and the experience of the surgeon. RPA should be considered as the gold standard for surgery, with HP being an exception

Food Contamination by Packaging

Миграция веществ из упаковки в пищевые продукты вызывает озабоченность органов по безопасности пищевых продуктов, а упаковочные материалы представляют собой потенциальный источник загрязняющих веществ, воздействию которых потребитель будет подвергаться в процессе своего питания. В упаковочных материалах может содержаться огромное разнообразие веществ, которые, следовательно, могут попадать в пищевые продукты и представлять опасность для здоровья потребителей. Загрязнение пищевых продуктов упаковкой содержит обзор основных загрязняющих веществ упаковки, включая бисфенол А, меламин, фталаты, альтернативные пластификаторы, фотоинициаторы, перфторохимикаты, насыщенные и ароматические углеводороды (насыщенные углеводороды минеральных масел и ароматические углеводороды минеральных масел) из минеральных масел, другие соединения, связанные с бисфенолом, наночастицы, первичные ароматические амины и непреднамеренно добавляемые вещества. Рассматриваются аналитические методы, используемые для их определения. Эта книга буИспользуемые программы Adobe AcrobatThe migration of substances from packaging to food is a matter of concern for the food safety authorities, and packaging materials constitute a potential source of contaminants to which the consumer will be exposed to through their diet. A huge variety of substances can be present in packaging materials, which could consequently migrate into food and represent a risk to consumer health. Food Contamination by Packaging provides an overview of the main packaging contaminants including Bisphenol A, melamine, phthalates, alternative plasticisers, photoinitiators, perfluorochemicals, saturated and aromatic hydrocarbons (mineral oil saturated hydrocarbons and mineral oil aromatic hydrocarbons) from mineral oils, other bisphenol-related compounds, nanoparticles, primary aromatic amines and nonintentionally added substances. The analytical techniques used for their determination are reviewed. This book will be of interest to students and researchers in universities and research institutions associated with food pack

Plasma Functionalization, Surface Characterization and Protein Retention of Multiple-Sized Polymer Beads

The surfaces of several types of polymer beads used in solid-phase extraction processes were modified with functional groups. Porous polystyrene (PS) macrospheres and polyvinylchloride (PVC) microspheres were plasma-modified in a fluidized-bed reactor by functionalization with allylamine (AIA) or acrylic acid (AcA). The surface compositions, as measured by XPS, showed the successful incorporation of the functional groups, and the number of this groups were assayed by derivatization onto model planar substrates. Furthermore, the influence on the surface Zeta potential of the beads was measured, which showed shifts of +/- 10 mV at physiological pH by the immobilized amino or carboxylic groups, respectively. A bovine serum albumin-fluorescein conjugate was used in a liquid chromatography system to evaluate the protein retention capacity. The results indicate higher protein retention on plasma-treated beads with respect to the untreated materials, and on PS when compared to PVC. Particularly high retention is obtained with AlA functionalization at 100 W.JRC.I.4-Nanotechnology and Molecular Imagin