Fast and Selective Sugar Conversion to Alkyl Lactate and Lactic Acid with Bifunctional Carbon–Silica Catalysts

Filip de Clippel; Michiel Dusselier; Ruben Van Rompaey; Pieter Vanelderen; Jan Dijkmans; Ekaterina Makshina; Lars Giebeler; Steffen Oswald; Gino V. Baron; Joeri F. M. Denayer; Paolo P. Pescarmona; Pierre A. Jacobs; Bert F. Sels

doi:10.1021/ja301678w

Fast and Selective Sugar Conversion to Alkyl Lactate and Lactic Acid with Bifunctional Carbon–Silica Catalysts

Journal of the American Chemical Society ◽

10.1021/ja301678w ◽

2012 ◽

Vol 134 (24) ◽

pp. 10089-10101 ◽

Cited By ~ 258

Author(s):

Filip de Clippel ◽

Michiel Dusselier ◽

Ruben Van Rompaey ◽

Pieter Vanelderen ◽

Jan Dijkmans ◽

...

Keyword(s):

Lactic Acid ◽

Sugar Conversion

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Batch and Continuous Lactic Acid Fermentation Based on A Multi-Substrate Approach

Microorganisms ◽

10.3390/microorganisms8071084 ◽

2020 ◽

Vol 8 (7) ◽

pp. 1084

Author(s):

Agata Olszewska-Widdrat ◽

Maria Alexandri ◽

José Pablo López-Gómez ◽

Roland Schneider ◽

Joachim Venus

Keyword(s):

Lactic Acid ◽

Bacillus Coagulans ◽

Batch Experiments ◽

Standard Medium ◽

Acid Fermentation ◽

Conversion Yield ◽

Platform Chemicals ◽

A Value ◽

Acid Whey ◽

Sugar Conversion

The utilisation of waste materials and industrial residues became a priority within the bioeconomy concept and the production of biobased chemicals. The aim of this study was to evaluate the feasibility to continuously produce L-lactic acid from different renewable substrates, in a multi-substrate strategy mode. Based on batch experiments observations, Bacillus coagulans A534 strain was able to continuously metabolise acid whey, sugar beet molasses, sugar bread, alfalfa press green juice and tapioca starch. Additionally, reference experiments showed its behaviour in standard medium. Continuous fermentations indicated that the highest productivity was achieved when molasses was employed with a value of 10.34 g·L−1·h−1, while the lactic acid to sugar conversion yield was 0.86 g·g−1. This study demonstrated that LA can be efficiently produced in continuous mode regardless the substrate, which is a huge advantage in comparison to other platform chemicals.

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Highly Active and Recyclable Sn-MWW Zeolite Catalyst for Sugar Conversion to Methyl Lactate and Lactic Acid

ChemSusChem ◽

10.1002/cssc.201300160 ◽

2013 ◽

Vol 6 (8) ◽

pp. 1352-1356 ◽

Cited By ~ 106

Author(s):

Qiang Guo ◽

Fengtao Fan ◽

Evgeny A. Pidko ◽

William N. P. van der Graaff ◽

Zhaochi Feng ◽

...

Keyword(s):

Lactic Acid ◽

Zeolite Catalyst ◽

Methyl Lactate ◽

Highly Active ◽

Mww Zeolite ◽

Sugar Conversion

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Study on Characteristics of Lactobacillus rhamnosus on Lactic Acid Fermentation with Different Substrates

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.665.388 ◽

2014 ◽

Vol 665 ◽

pp. 388-392

Author(s):

Ning Li ◽

Yu Cai Lü ◽

Da Chun Gong

Keyword(s):

Lactic Acid ◽

Conversion Rate ◽

Lactobacillus Rhamnosus ◽

Reducing Sugar ◽

Lactic Acid Fermentation ◽

Sugar Concentration ◽

Wet Oxidation ◽

Acid Fermentation ◽

Substrate Conversion ◽

Sugar Conversion

In order to investigate characteristics of Lactobacillus rhamnosus on lactic acid fermentation using different substrate, in this study, saccharification liquid obtained during wet oxidation blasting of straw were used as substrate, conversion reducing sugar to lactate by Lactobacillus rhamnosus was studied and compared with fermentation using glucose as substrate, The results indicated that Lactobacillus rhamnosus could utilize reducing sugar in saccharification liquid obtained during wet oxidation blasting of straw effectively. The highest efficiency of reducing sugar conversion (92.45%) appeared when concentration of reducing sugar as substrate was 20mg/mL; conversion rate of reducing sugar decreased as increasing of sugar concentration. Fermentation of saccharification liquid obtained during wet oxidation blasting of straw to lactic acid by Lactobacillus rhamnosus had optimal effects in the first 48h of incubation.

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Demonstration of Retinal Glycogen with Silver Methenamine

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100066875 ◽

1971 ◽

Vol 29 ◽

pp. 564-565

Author(s):

A. W. Sedar ◽

G. H. Bresnick

Keyword(s):

Lactic Acid ◽

Chromic Acid ◽

Periodic Acid ◽

Müller Cell ◽

External Limiting Membrane ◽

Electron Microscope Level ◽

Reactive Process ◽

Inner Limiting Membrane ◽

Muller Cell ◽

And Migration

After experimetnal damage to the retina with a variety of procedures Müller cell hypertrophy and migration occurs. According to Kuwabara and others the reactive process in these injuries is evidenced by a marked increase in amount of glycogen in the Müller cells. These cells were considered originally supporting elements with fiber processes extending throughout the retina from inner limiting membrane to external limiting membrane, but are known now to have high lactic acid dehydrogenase activity and the ability to synthesize glycogen. Since the periodic acid-chromic acid-silver methenamine technique was shown to demonstrate glycogen at the electron microscope level, it was selected to react with glycogen in the fine processes of the Müller cell that ramify among the neural elements in various layers of the retina and demarcate these cells cytologically. The Rhesus monkey was chosen as an example of a well vascularized retina and the rabbit as an example of a avascular retina to explore the possibilities of the technique.

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