scholarly journals Quantitative analysis of polyurethane nanocomposites with boehmite structures modified using lactic acid

2007 ◽  
Author(s):  
J. Ryszkowska
Keyword(s):  
Lactic Acid ◽  
Quantitative Analysis ◽  
Polyurethane Nanocomposites

scholarly journals The isolation of exopolysaccharide-producing lactic acid bacteria from lontar (Borassus flabellifer L.) sap

2020 ◽  
Author(s):  
Anik Ma'unatin ◽  
Harijono Harijono ◽  
Elok Zubaidah ◽  
Muhaimin Rifa'i
Keyword(s):  
Lactic Acid ◽  
Quantitative Analysis ◽  
Lactic Acid Bacteria ◽  
16S Rdna ◽  
Leuconostoc Mesenteroides ◽  
Dry Mass ◽  
Total Sugar ◽  
Liquid Media ◽  
High Level ◽  
One Way Anova

Background and Objectives: Lontar (Borassus flabellifer L.) is widely grown in Indonesia and one of its products is palm sap. Palm sap contains a high level of sugar, making it suitable as a medium to increase the lactic acid bacteria (LAB) production of exopolysaccharides (EPS). This study aimed to isolate the EPS-producing LAB from palm sap and evaluate its EPS production. LAB isolation was carried out on MRS agar containing 0.5% CaCO3 . Materials and Methods: The screening and production of EPS were carried out on MRS media supplemented with 10% sucrose. The molecular identification of the selected EPS-producing LAB was based on 16S rDNA. A quantitative analysis of EPS polymer dry mass and total sugar was conducted using one-way ANOVA. Results: In this study, five EPS-producing LABs were found: Fructobacillus fructosus N4, Leuconostoc mesenteroides N5, Leuconostoc mesenteroides N7, Leuconostoc mesenteroides N9, and Fructobacillus fructosus N10. The highest EPS yield in liquid media was 10.997 ± 1.591 g/L by Leuconostoc mesenteroides N7, whereas the lowest was 4.505 ± 0.459 g/L by Fructobacillus fructosus N10. Conclusion: This study found Fructobacillus fructosus strains as EPS producers that have never been reported before.

scholarly journals Influence of clay-nanofiller geometry on the structure and properties of poly(lactic acid)/thermoplastic polyurethane nanocomposites

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30755-30762 ◽  
Author(s):  
I. Kelnar ◽  
J. Kratochvíl ◽  
I. Fortelný ◽  
L. Kaprálková ◽  
A. Zhigunov ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Polymer System ◽  
Poly Lactic Acid ◽  
Structure And Properties ◽  
Complex Effect ◽  
Polyurethane Nanocomposites

The complex effect of platy and tubular nanofillers on the performance of a biodegradable multiphase polymer system is presented.

Study on Temperature Regulation of Lactic Acid Bacteria Using Metabolic Flux Analysis

2011 ◽  
Vol 356-360 ◽  
pp. 127-132
Author(s):  
Xiao Jing Xiong ◽  
Yong Feng Li
Keyword(s):  
Lactic Acid ◽  
Quantitative Analysis ◽  
Lactic Acid Bacteria ◽  
Metabolic Flux Analysis ◽  
Metabolic Flux ◽  
Lactic Acid Production ◽  
Flux Analysis ◽  
Culture Temperature ◽  
Metabolic Intermediates ◽  
Fermentation Stage

Fermentation studies of lactic acid bacteria Rennanqilyf13 were performed to evaluate the potential impacts of culture temperature on cell growth and the production of L-Lactic acid. Quantitative analysis of several metabolic intermediates using metabolic flux analysis (MFA) revealed fluxes during the L-Lactic acid production from glucose. According to the metabolic flux from glucose to L-lactic acid, using different temperature at different fermentation stage maximized the concentration, yield and productivity of L-lactic acid.

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