Development and optimization of antimicrobial active films produced with a reinforced and compatibilized biodegradable polymers

Publication date: June 2020Source: Food Packaging and Shelf Life, Volume 24Author(s): Taíla V. de Oliveira, Pedro Augusto V. de Freitas, Cícero C. Pola, José Osvaldo R. da Silva, Lina Daniela A. Diaz, Sukarno Olavo Ferreira, Nilda de F.F. SoaresAbstractBiodegradable polymers can produce sustainable films to substitute regular food packaging as an answer to environmental concerns and food preservation. Nisin Z (NIS Z) bioactive compound can be embedded into biodegradable polymers, such as polyvinyl alcohol (PVA) and starch, to produce antimicrobial eco-friendly active films. Cellulose nanocrystals (CNC) and maleic anhydride (MA) have been added into matrix films, as reinforcement compounds, to improve polymer’s performance. For this reason, Corn Starch-PVA biodegradable film blends were produced by the incorporation of CNC, MA and NIS Z according the concentration values obtained from the Central Composite Designs. Desirability function was stablished promoting a maximization of antimicrobial effects and mechanical features and a minimization of barrier responses. Film topographies were examined using a profilometer and a scanning electron microscopic and a heterogeneous surface patterns were observed. Moreover, the active films were also evaluated by X-ray diffraction and color analysis. L. monocytogenes control efficiency by the films highlighted the potential to produce active biodegradable films as an alternative to the addition of food preservat...
Source: Food Packaging and Shelf Life - Category: Food Science Source Type: research

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This study proposes the braided bone scaffolds. First, biologically degradable polylactic acid (PLA) filaments and polyvinyl alcohol (PVA) filaments are plied into composite yarns using a doubling and twisting machine. The composite yarns are tested to determine the optimal mechanical properties and a stabilized morphology. The PLA/PVA composite yarns are then braided into bone scaffolds, during which the optimal braiding process parameters and yarn ratio are determined. Based on the surface observation and tensile strength, a gear ratio of 45:45 provides the tubular braids with an optimal morphology and porosity that meet...
Source: Journal of the Mechanical Behavior of Biomedical Materials - Category: Materials Science Authors: Tags: J Mech Behav Biomed Mater Source Type: research
by Jee Wook Kim, Min Soo Byun, Dahyun Yi, Jun Ho Lee, Kang Ko, So Yeon Jeon, Bo Kyung Sohn, Jun-Young Lee, Yu Kyeong Kim, Seong A Shin, Chul-Ho Sohn, Dong Young Lee, for the KBASE Research Group BackgroundAn emerging body of literature has indicated that moderate alcohol intake may be protective against Alzheimer disease (AD) dementia. However, little information is available regarding whether moderate alcohol intake is related to reductions in amyloid-beta (A β) deposition, or is protective via amyloid-independent mechanisms in the living human brain. Here we examined the associations of moderate alcohol intake with ...
Source: PLoS Medicine - Category: Internal Medicine Authors: Source Type: research
Publication date: Available online 21 February 2020Source: Biocybernetics and Biomedical EngineeringAuthor(s): Ashima Khosla, Padmavati Khandnor, Trilok ChandAbstractElectroencephalogram (EEG) measures the neuronal activities in the form of electric currents that are generated due to the synchronized activity by a group of specialized pyramidal cells inside the brain. The study presents a brief comparison of various functional neuroimaging techniques, revealing the excellent neuroimaging capabilities of EEG signals such as high temporal resolution, inexpensiveness, portability and non-invasiveness as compared to the other ...
Source: Biocybernetics and Biomedical Engineering - Category: Biomedical Engineering Source Type: research
This study seeks to understand whether people substitute between recreational cannabis and conventional over-the-counter (OTC) sleep medications. UPC-level grocery store scanner data in a multivariable panel regression design were used to compare the chang...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Alcohol and Other Drugs Source Type: news
Publication date: Available online 20 February 2020Source: Carbohydrate PolymersAuthor(s): Shivayogi S. Narasagoudr, Veena G. Hegde, Vinayak N. Vanjeri, Ravindra B. Chougale, Saraswati P. MastiAbstractEthyl vanillin (EV) incorporated chitosan (CS)/poly(vinyl alcohol)(PVA) blend films of various ratios (1:3, 1:1 and 3:1) were prepared by solvent casting technique. The effect of EV on the mechanical, structural, barrier, optical, food compatibility and antibacterial properties of the CS/PVA films were investigated. Mechanical properties showed that addition of EV increased tensile strength of CPEV-1, CPEV-2 and CPEV-3 films ...
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research
ibeiro-Carvalho A Abstract The brain is particularly vulnerable to ethanol effects during its growth spurt. Outcomes of early ethanol exposure such as hyperactivity have been extensively investigated; however, persons with fetal alcohol spectrum disorder frequently have social impairments and are heavy drinkers. Despite that, scant information is available regarding the neurobiological basis of these latter behavioral issues. Here, Swiss mice exposed to ethanol (Etoh, 5 g/Kg i.p., alternate days) or saline during the brain growth spurt [postnatal day (PN) 2 to 8] were used to assess social behavior after an e...
Source: International Journal of Developmental Neuroscience - Category: Neuroscience Authors: Tags: Int J Dev Neurosci Source Type: research
CONCLUSION: Findings allow for a better understanding of brain networks affected by HIV and alcohol and may provide avenues for interventions. PMID: 32065091 [PubMed - as supplied by publisher]
Source: Current HIV Research - Category: Infectious Diseases Authors: Tags: Curr HIV Res Source Type: research
Conclusion3D printed PVA model can be used for chairside crown fabrication with an acceptable accuracy.
Source: Journal of Prosthodontic Research - Category: Dentistry Source Type: research
ConclusionsSignificant associations between infant milk feeding and lumbar spine BMD in males indicate that breastmilk may be protective for the bone health of male babies. The evidence presented here underscores the potential lifelong benefits of breastfeeding and may highlight the differences between osteoporotic risk factors for males and females.
Source: Osteoporosis International - Category: Orthopaedics Source Type: research
Conclusion Learning how to pay attention to our attention (meta-attention) can be transformative. Using principles from cognitive science, we can create a comprehensive approach (attention capital theory in medicine) to reclaim the meaning and joy that has been depleted from our profession. Increasing the difficulty of our work to match our skill level, delegating low-level tasks to help us focus on critical steps in our physician zone, creating rules to eliminate distractions, and noticing both the wonder and suffering around us may be more important than resilience training or wellness modules. Although well-intention...
Source: The Health Care Blog - Category: Consumer Health News Authors: Tags: Medical Practice Physicians Burnout physician burnout physician wellness Sanj Katyal Source Type: blogs
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