Synthesis and properties of novel polyvinyl alcohol-lactic acid gels

2009 ◽  
Vol 113 (4) ◽  
pp. 2053-2061 ◽  
Author(s):  
John Mmari Onyari ◽  
Samuel J. Huang
Keyword(s):  
Lactic Acid ◽  
Polyvinyl Alcohol

Immobilization of Rhizopus oryzae in a modified polyvinyl alcohol gel for L(+)-lactic acid production

2012 ◽  
Vol 63 (3) ◽  
pp. 957-964 ◽  
Author(s):  
Peng Wang ◽  
Zhen Chen ◽  
Juan Li ◽  
Li Wang ◽  
Guohong Gong ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Polyvinyl Alcohol ◽  
Acid Production ◽  
Rhizopus Oryzae ◽  
Lactic Acid Production

scholarly journals Swelling behavior of polyvinyl alcohol and lactic acid hydrogel films

2016 ◽  
Vol 11 (1) ◽  
pp. 102-103 ◽  
Author(s):  
Jirapornchai Suksaeree ◽  
Chitradee Luprasong ◽  
Chaowalit Monton
Keyword(s):  
Lactic Acid ◽  
Polyvinyl Alcohol ◽  
Swelling Behavior ◽  
Hydrogel Films

scholarly journals Swelling Properties of Propranolol HCl-loaded Polyvinyl Alcohol-graft-lactic Acid Hydrogel Films

2018 ◽  
Vol 237 ◽  
pp. 02004
Author(s):  
Jirapornchai Suksaeree ◽  
Chomnapas Chuchote
Keyword(s):  
Lactic Acid ◽  
Ionic Strength ◽  
Polyvinyl Alcohol ◽  
Controlled Drug Release ◽  
Pharmaceutical Product ◽  
Medium Ph ◽  
Swelling Behaviour ◽  
Swelling Properties ◽  
Propranolol Hcl ◽  
Hydrogel Films

This paper presented the swelling properties of propranolol HCl-loaded polyvinyl alcohol-graft-lactic acid (PPH-loaded PVA-g-LA) hydrogel films. The swelling properties including swelling-deswelling measurement and swelling behaviour in different environmental stimuli fluids such as water, various pH, and various ionic strength were determined. It was found that the swelling properties of the PPH-loaded PVA-g-LA hydrogel films depend on the LA amount addition. They had a good swelling and deswelling in water and acetone. The PPH-loaded PVA-g-LA hydrogel films showed the high swelling in the medium pH 7. Thus, the prepared PPH-loaded PVA-g-LA hydrogel films had a good swelling property that could be used to controlled drug release in pharmaceutical product.

scholarly journals Novel Polyvinyl Alcohol/Starch Electrospun Fibers as a Strategy to Disperse Cellulose Nanocrystals into Poly(lactic acid)

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 117 ◽  
Author(s):  
Carol López de Dicastillo ◽  
Karina Roa ◽  
Luan Garrido ◽  
Alejandro Pereira ◽  
Maria Galotto
Keyword(s):  
Lactic Acid ◽  
Polyvinyl Alcohol ◽  
Cellulose Nanocrystals ◽  
Poly Lactic Acid ◽  
Electrospun Fibers

Flexible polyvinyl alcohol/2-hydroxypropanoic acid films: effect of residual acetyl moieties on mechanical, thermal and antibacterial properties

2015 ◽  
Vol 35 (4) ◽  
pp. 319-327 ◽  
Author(s):  
Martina Hrabalikova ◽  
Martha Merchan ◽  
Solongo Ganbold ◽  
Vladimir Sedlarik ◽  
Pavel Valasek ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Polyvinyl Alcohol ◽  
Antibacterial Properties ◽  
Degree Of Hydrolysis ◽  
Mechanical And Thermal Properties ◽  
Hydrolysis Degree ◽  
Flexible Films ◽  
Agar Diffusion Test ◽  
Extended Interaction ◽  
Hydrolysis Of

Abstract This work ascertains the effect of the degree of hydrolysis of polyvinyl alcohol under extended interaction with 2-hydroxypropanoic acid (lactic acid). Systems based on three different types of polyvinyl alcohol matrices (of hydrolysis degree 80, 88 and 98 mol%) and lactic acid were characterized according to their physicochemical, mechanical and thermal properties. An agar diffusion test and the dilution and spread plate technique were conducted to facilitate antibacterial activity to counteract Staphylococcus aureus and Escherichia coli. A mathematical model was applied to the experimental data to estimate the antibacterial efficacy of the resultant flexible films.

scholarly journals Enzymatic Time-Temperature Indicator Prototype Developed by Immobilizing Laccase on Electrospun Fibers to Predict Lactic Acid Bacterial Growth in Milk during Storage

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1160
Author(s):  
Ting-Yu Tsai ◽  
Shih-Hsin Chen ◽  
Li-Chen Chen ◽  
Shih-Bin Lin ◽  
Shyi-Neng Lou ◽  
...  
Keyword(s):  
Activation Energy ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Polyvinyl Alcohol ◽  
Prediction Error ◽  
Temperature Response ◽  
Electrospun Fibers ◽  
Visual Monitoring ◽  
Temperature Changes ◽  
Colony Forming Units

Laccase was immobilized on a chitosan/polyvinyl alcohol/tetraethylorthosilicate electrospun film (ceCPTL) and colored with guaiacol to obtain a laccase time–temperature indicator (TTI) prototype. The activation energy (Ea) of coloration of the prototype was 50.89–33.62 kJ/mol when 8–25 μg/cm2 laccase was immobilized on ceCPTL, and that of lactic acid bacteria (LAB) growth in milk was 73.32 kJ/mol. The Ea of coloration of the TTI prototype onto which 8–10 μg/cm2 laccase was immobilized was in the required range for predicting LAB growth in milk. The coloration endpoint of the TTI prototype onto which 10 μg/cm2 (0.01 U) laccase was immobilized could respond to the LAB count reaching 106 colony-forming units (CFU)/mL in milk during a static temperature response test, and the prediction error was discovered to be low. In dynamic temperature response experiments with intermittent temperature changes between 4 and 25 °C, the coloration rate of the laccase TTI prototype was consistent with LAB growth. The results of this study indicate that the laccase TTI prototype can be applied as a visual monitoring indicator to assist in evaluating milk quality in cold chains.

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