The Grizzly, October 9, 2014

Jewish Holiday Sukkot Begins • Life Chain on Main Street • Reimert Courtyard Program Becomes Permanent • UC Partners with Perkiomen Watershed Conservancy • Students Plant on Green Roof • Students Respond to Yik Yak • Students\u27 Campus Jobs • Dorian Gray Comes to Ursinus • History of Bomberger Memorial Hall • Opinion: Islamic State in Syria Conflict Heats Up; Military Strategies for U.S. Foreign Affairs • Local HS Star Running Well for Bears • Far-Away Runner Excelling for XChttps://digitalcommons.ursinus.edu/grizzlynews/1912/thumbnail.jp

Food applications of active packaging EVOH films containing cyclodextrins for the preferential scavenging of undesirable compounds

[EN] Novel ethylene-vinyl alcohol copolymer (EVOH) films containing beta-cyclodextrins (beta CD) with potential application in active food packaging have been tested as materials for the preferential retention of undesired food components. The films were immersed on pasteurized milk and UHT milk and stored at 4 and 23 degrees C, respectively. The films containing beta CD presented a significant reduction in cholesterol concentration, achieving a 23% reduction in UHT milk exposed to EVOH films containing 30% beta CD. Despite the immobilization of the beta CD and the large molecular size of cholesterol, 15% of the beta CD molecules added to the films were involved in the formation of beta CD/cholesterol inclusion complexes. In another set of experiments, the films were used to reduce the presence of aldehydes (substances which develop as a result of oxidative processes) in packaged fried peanuts. The films containing beta CD brought a significant reduction in hexanal, reaching a 50% decrease over short periods (1-5 weeks). At longer storage times (10 weeks) the retention capacity of the developed films was exhausted and no differences were observed between the samples. (C) 2011 Elsevier Ltd. All rights reserved.The authors are grateful for the financial support of the Spanish Ministry of Science and Innovation, projects AGL2006-02176, AGL2009-08776 and Fun-C-Food CSD2007-00063, and of the C.L-d-D fellowship (FPU program). Mary Georgina Hardinge provided assistance with the English language text.López-De-Dicastillo, C.; Catala Moragrega, R.; Gavara Clemente, R.; Hernandez Muñoz, MP. (2011). Food applications of active packaging EVOH films containing cyclodextrins for the preferential scavenging of undesirable compounds. Journal of Food Engineering. 104(3):380-386. https://doi.org/10.1016/j.jfoodeng.2010.12.033S380386104

Interrelationship of Potassium and Vagal Action on the Sinoatrial Pacemaker and on Atrioventricular Conduction *

In a previous communication, evidence was presented that elevation of plasma potassium from a mean control level of 3.4 mEq per L to a mean of 6.1 mEq per L inhibited or greatly reduced the ability of acetylcholine to induce atrioventricular (AV) block (1). These observations were made utilizing intermittent intracoronary injections of acetylcholine and intravenous infusion of potassium. The purpose of the present investigation was threefold: first, to study the interaction between potassium and endogenously liberated acetylcholine (vagal action) rather than exogenous acetylcholine as had been done previously; second, to determine if this interrelationship applies equally to AV transmission and impulse formation by the sinoatrial (SA) node; third, to eliminate by direct intracoronary injection of potassium the possibility that the results in the initial study were due to the peripheral effects of the cation. Methods Thirteen experiments were performed on twelve mongrel dogs weighing from 10.7 to 16.5 kg. The animals were anesthetized with intramuscular morphine, 2.5 mg per kg, followed in 30 minutes by intravenous pentobarbital, 15 mg per kg. The dogs were intubated, and ventilation was controlled with a Harvard respirator. The ventilatory rate varied between 14 and 20 breaths per min-* Submitted for publication June 26, 1964; accepte

Contamination of packaged food by substances migrating from a direct-contact plastic layer: Assessment using a generic quantitative household scale methodology

The contamination risk in 12 packaged foods by substances released from the plastic contact layer has been evaluated using a novel modeling technique, which predicts the migration that accounts for (i) possible variations in the time of contact between foodstuffs and packaging and (ii) uncertainty in physico-chemical parameters used to predict migration. Contamination data, which are subject to variability and uncertainty, are derived through a stochastic resolution of transport equations, which control the migration into food. Distributions of contact times between packaging materials and foodstuffs were reconstructed from the volumes and frequencies of purchases of a given panel of 6422 households, making assumptions about household storage behaviour. The risk of contamination of the packaged foods was estimated for styrene (a monomer found in polystyrene yogurt pots) and 2,6-di-tert-butyl-4-hydroxytoluene (a representative of the widely used phenolic antioxidants). The results are analysed and discussed regarding sensitivity of the model to the set parameters and chosen assumption