Catalytic oxidative dehydrogenation of malic acid to oxaloacetic acid

2019 ◽  
Vol 21 (17) ◽  
pp. 4604-4608
Author(s):  
Asmaa Drif ◽  
Antonio Pineda ◽  
Didier Morvan ◽  
Virginie Belliere-Baca ◽  
Karine De Oliveira Vigier ◽  
...  
Keyword(s):  
Amino Acids ◽  
Oxidative Dehydrogenation ◽  
Malic Acid ◽  
Oxaloacetic Acid

Here we report the oxidative dehydrogenation of malic acid to oxaloacetic acid, a key precursor in the fabrication of amino acids, over Pt–Bi/C catalysts.

scholarly journals Metabolic Responses of Lactobacillus plantarum Strains during Fermentation and Storage of Vegetable and Fruit Juices

2014 ◽  
Vol 80 (7) ◽  
pp. 2206-2215 ◽  
Author(s):  
P. Filannino ◽  
G. Cardinali ◽  
C. G. Rizzello ◽  
S. Buchin ◽  
M. De Angelis ◽  
...  
Keyword(s):  
Amino Acids ◽  
Lactobacillus Plantarum ◽  
Malic Acid ◽  
Gamma Aminobutyric Acid ◽  
Content Type ◽  
Growth And Survival ◽  
The Matrix ◽  
Cell Densities ◽  
Almost All ◽  
And Storage

ABSTRACTStrains ofLactobacillus plantarumwere grown and stored in cherry (ChJ), pineapple (PJ), carrot (CJ), and tomato (TJ) juices to mimic the chemical composition of the respective matrices. Wheat flour hydrolysate (WFH), whey milk (W), and MRS broth were also used as representatives of other ecosystems. The growth rates and cell densities ofL. plantarumstrains during fermentation (24 h at 30°C) and storage (21 days at 4°C) differed only in part, being mainly influenced by the matrix. ChJ and PJ were the most stressful juices for growth and survival. Overall, the growth in juices was negatively correlated with the initial concentration of malic acid and carbohydrates. The consumption of malic acid was noticeable for all juices, but mainly during fermentation and storage of ChJ. Decreases of branched-chain amino acids (BCAA)—with the concomitant increase of their respective branched alcohols—and His and increases of Glu and gamma-aminobutyric acid (GABA) were the main traits of the catabolism of free amino acids (FAA), which were mainly evident under less acidic conditions (CJ and TJ). The increase of Tyr was found only during storage of ChJ. Some aldehydes (e.g., 3-methyl-butanal) were reduced to the corresponding alcohols (e.g., 3-methyl-1-butanol). After both fermentation and storage, acetic acid increased in all fermented juices, which implied the activation of the acetate kinase route. Diacetyl was the ketone found at the highest level, and butyric acid increased in almost all fermented juices. Data were processed through multidimensional statistical analyses. Except for CJ, the juices (mainly ChJ) seemed to induce specific metabolic traits, which differed in part among the strains. This study provided more in-depth knowledge on the metabolic mechanisms of growth and maintenance ofL. plantarumin vegetable and fruit habitats, which also provided helpful information to select the most suitable starters for fermentation of targeted matrices.

scholarly journals Carbon utilization phenome of Leptospira interrogans serovar Manilae strain K64

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Ailyn G Manglicmot-Yabes ◽  
Sharon Yvette Angelina M. Villanueva ◽  
Nina G. Gloriani
Keyword(s):  
Amino Acids ◽  
Methyl Ester ◽  
Malic Acid ◽  
Metabolic Pathways ◽  
Carbon Sources ◽  
The Philippines ◽  
Health Concern ◽  
Leptospira Interrogans ◽  
Carbon Utilization ◽  
Leptospira Species

Background: Leptospirosis, an acute febrile disease caused by the pathogenic species of genus Leptospira, is one of the neglected emerging zoonoses that is of global public health concern. The recent genus-wide sequencing of Leptospira isolates led to the need for better understanding of the complex metabolic mechanisms of this organism. However, majority of the published studies on Leptospira metabolism were still the pioneering works of Baseman and Cox in the 60’s and their contemporaries. Knowledge on the carbon sources that supports the growth of a Leptospira species will not only contribute to the limited metabolic studies but will further support the reported genes and metabolic pathways of this organism. Objective:  Thus, this study aimed to describe the carbon utilization phenome of Leptospira interrogans serovar Manilae strain K64, one of the dominantly circulating pathogenic Leptospira in the Philippines. Methods:  A previously optimized BiologTM Gen III sole carbon utilization phenotype microarray assay protocol for leptospires was adapted. Results:  L. interrogans serovar Manilae strain K64 showed utilization of 29 carbon sources belonging to sugars and sugar derivatives, amino acids, methyl ester, carboxylic acid and fatty acids. These were N-acetyl-β-D-mannosamine, N-acetyl-D-galactosamine, N-acetyl neuraminic acid, D-fructose, D-galactose, 3-methyl glucose, D-fucose, L-fucose, L-rhamnose, inosine, D-fructose-6-phosphate, D-gluconic, D-glucuronic acid, glucuronamide, D-saccharic acid, D-aspartic acid, D-serine,  L-alanine, L-arginine,  L-histidine, L-pyroglutamic acid, L-serine, D-lactic acid methyl ester, citric acid, D-malic acid, L-malic acid, alpha ketoglutaric acid, alpha ketobutyric acid, and acetoacetic acid.  Discussion and Conclusion:  The carbon sources utilized by L. interrogans serovar Manilae strain K64 agreed well with the identified genes and metabolic pathways among Leptospira species.  Moreover, these 29 carbon sources have been previously reported to be associated in the biosynthesis of peptidoglycan, lipopolysaccharide, histidine, sulfur, amino acids, and isoleucine and in other metabolic pathways such as glycolysis, pentose-phosphate, pyruvate and fatty acid in Leptospira spp.

Chemical Composition of Florida Orange Juice

1969 ◽  
Vol 52 (6) ◽  
pp. 1150-1152
Author(s):  
Kermit M Floyd ◽  
Grayson R Rogers ◽  
Jimmy E Harrell ◽  
Perry S Wilkes
Keyword(s):  
Amino Acids ◽  
Chemical Composition ◽  
Malic Acid ◽  
Orange Juice ◽  
Statistical Study ◽  
Soluble Solids ◽  
Processing Plants ◽  
May 1968 ◽  
Authentic Data

Abstract Authentic samples of Florida orange juice were analyzed for soluble solids, acidity, amino acids, polyphenolics, l-malic acid, and betaine. Samples were collected from various processing plants from December 1967 through May 1968. Authentic data and a statistical study are presented.

Chemical Composition of Florida Orange Juice Concentrates

1969 ◽  
Vol 52 (5) ◽  
pp. 1047-1048
Author(s):  
Kermit M Floyd ◽  
Jimmy E Harrell
Keyword(s):  
Amino Acids ◽  
Chemical Composition ◽  
Malic Acid ◽  
Orange Juice ◽  
Statistical Study ◽  
Soluble Solids ◽  
Processing Plants ◽  
May 1968 ◽  
Authentic Data

Abstract Authentic samples of Florida orange juice concentrates were analyzed for soluble solids, acidity, amino acids, polyphenolics, f-malic acid, and betaine. Samples were collected from various processing plants during January through May 1968. Authentic data and a statistical study are presented.

Lemon Juice Composition. I. Characterization of California-Arizona Lemon Juice by Its Total Amino Acid and l-Malic Acid Content

1963 ◽  
Vol 46 (3) ◽  
pp. 353-358 ◽  
Author(s):  
Carl E Vandercook ◽  
Laurence A Rolle ◽  
Robert M Ikeda
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Malic Acid ◽  
Acid Content ◽  
Optical Rotation ◽  
Lemon Juice ◽  
Total Amino Acid ◽  
The Individual ◽  
Composition I ◽  
Total Amino Acids

Abstract The total amino acid and i-malic acid content of 61 samples of commercial California-Arizona lemon juice and lemon juice concentrates were studied. In characterizing these juices, relationships were observed between the natural citric acid content and the amounts of their total amino acids and l-malic acid. Total amino acids were determined by formol titration, while the l-malic acid was determined by measuring the optical rotation of a uranylmalate complex. Paper chromatograms of the individual amino acids are used to supplement these methods of analysis for characterizing lemon juice.

scholarly journals Influence of Aluminum at Low pH on the Rhizosphere Processes of Masson Pine (Pinus Massoniana Lamb)

2021 ◽  
Author(s):  
Wang Ping ◽  
Zhou Sijie ◽  
Li Ao ◽  
Xie Linbei
Keyword(s):  
Amino Acids ◽  
Secondary Metabolites ◽  
Oxalic Acid ◽  
Malic Acid ◽  
Low Ph ◽  
Al Toxicity ◽  
Rhizosphere Ph ◽  
Endogenous Hormones ◽  
Masson Pine ◽  
Rhizosphere Acidification

Abstract Trees in general are very tolerant of aluminum (Al, mainly Al3+ at pH ≦ 5.0), and the small effects seen in the contaminated soils may mislead people that the contamination is unimportant. We believe that the assessments with Al-sensitive Masson pine could have revealed a bigger difference. The key point of this study was to characterize the Al toxicity for Masson Pine. The objectives were to discover the specific eco-physiological relationship between pine roots and rhizosphere Al, and to investigate the Al effects on several parameters, measured in the rhizosphere of Masson pine. Masson pine seedlings were cultivated on a hydroponic setup. Through comprehensive laboratory dose-gradient experiments, Al-triggered composition of the root-released compounds and several rhizospheric parameters were determined by chromatography or spectroscopy. This study gives an important evidence of the Al-toxicity effects on the composition of root-released compounds and the root growth of Masson pine. Results showed that higher rhizospheric Al at pH 4.5 might contribute to increased release of sugars, and also could stimulate the release of oxalic acid and malic acid. The total of secreted amino acids were correlated with the rhizosphere Al. Zero additional Al induced no rhizosphere pH elevation, but Al-induced rhizosphere acidification (pH from 4.50 to 4.22) was observed at Al 100 µM. Greater additions of Al (>300 µM) suppressed the rhizosphere acidification at pH 3.92. Added Al had a negative effect on the dry weight of pine roots, but an opposite effect on Al accumulated in the roots was observed. The four endogenous hormones were also determined in the pine roots. Gibberellic acid (GA3) decreased, whereas abscisic acid (ABA) increased simultaneously with the addition of Al. Their inflexional concentrations were most frequently observed at 100 µM, which might be the threshold of Al toxicity for Masson pine. The secondary metabolites assayed have been studied in relation to the rhizospheric Al. The rhizosphere Al species at low pH can trigger pine roots to release the sugars (glucose, fructose + aldose), organic acids (oxalic acid, and malic acid), amino acids, secondary metabolites, and endogenous hormones during their growth. Meanwhile it also affected the growth of pine roots. This is an extensive study, which can help understanding the toxicity of Al to this important pioneer species of acid forest soils in south China.

New Green Animal Waste Hydrolysis Initiated by Malic Acid

2021 ◽  
Vol 07 ◽  
Author(s):  
Jiri Hanika ◽  
Milena Rouskova ◽  
Stanislav Sabata ◽  
Frantisek Kastanek ◽  
Olga Solcova
Keyword(s):  
Amino Acids ◽  
Malic Acid ◽  
Water Solution ◽  
Animal Waste ◽  
Poultry Waste ◽  
Chicken Feathers ◽  
Animal Wastes ◽  
Other Substances ◽  
Hydrolysis Of ◽  
Sheep Wool

Background: A giant amount of poultry waste represents one of the threats to the environment, or conversely, a significant source of peptides and other substances in demand. A rational use of huge quantities of poultry waste, especially after industrial chicken processing, is one of the pillars of biorefinery of livestocks wastes. Introduction: Six different animal wastes: chicken feathers, cartilages and rest after meat separation, sheep wool, rabbit hair, and the rest of goose feathers from blankets after cleaning were chosen for a hydrolysis test with malic acid as the initiator. Result: The newly designed hydrolysis of animal wastes at 140 oC with malic acid for initiation was successfully verified for all animal wastes. Resulting hydrolysates contained a mixture of amino acids, peptides, proteins, glycoproteins and no salts. Conclusion: Hydrolysate applications for agriculture was successfully tested as a biostimulant in the form of 10% water solution.

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