L-aspartate is an important 4-carbon platform compound that can be used as the precursor of numerous chemical products. The bioproduction of L-aspartate directly from biomass resources is expected to provide a more cost-competitive technique route. Yet little metabolic engineering work on this m...

SummaryObjectivesToday, obesity and inactivity are important health problems in the world and the effective treatments are needed. The aim of the present study was to investigate the effect of beta-alanine supplementation on time to exhaustion and one repetition maximum (1RM) in overweight seden...

Water-uptakes of pure sodium carbonate (Na2CO3), pure β-alanine and internally mixed β-alanine/Na2CO3 aerosol particles with different mole ratios are first monitored using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) technique. For pure Na2CO3 aerosol partic...

A method for the determination of small halogenated carboxylic acid (HCA) residues in drug substances is urgently needed because of the potential of HCAs for genotoxicity and carcinogenicity in humans. We have now developed a simple method, involving derivatization followed by high performance l...

Manganese(III) acetate oxidation of some ketones in the presence of 3-chloropropionic acid was carried out. The products were characterized. The experimental results were compared with the theoretical ones which was based on AM1 (UHF) type semi-empirical calculations. The theoretical results dis...

The purpose of this paper is to describe and evaluate the corrosion of carbon steel in crotonic acid for hydrogen production and using polysorbate 20 (NS), dioctyl sodium sulfosuccinate (AS) and benzalkonium chloride (CS) to control hydrogen evolution. Measurements were conducted in tested solut...

Water extracts from the carrot seed (Daucus carota L.) var. Perfekcja exhibit plant growth inhibitory properties against cress, cucumber, onion and carrot in a dose-dependant manner. This property results from the action of low-and high-molecular components of the extract. The low-molecular comp...

Misfolded proteins that escape cellular quality control check lay the foundation for several progressively widespread neurodegenerative diseases, diabetes and others. Here, crotonic and citric acid are employed to study aggregation behaviour of hemoglobin (Hb). A systematic investigation on vary...

In our study the solubilities of crotonic acid in methanol, ethanol, 2-propanol, 1-butanol, acetic acid, N,N-dimethylformamide, ethyl acetate and acetonitrile were experimentally determined over the temperature range of (278.15–333.15) K at around 5 K intervals by employing an analytical stirre...

The mild pyrolysis of switchgrass/poly-3-hydroxybutyrate (P3HB) blends that mimic P3HB-producing switchgrass lines was studied in a pilot scale fluidized bed reactor with the goal of simultaneously producing crotonic acid, a switchgrass-based bio-oil, and bio-char. Factors such as pyrolysis temp...

Bio-based material development has become a new focus globally due to limited supply, increasing price of fossil fuel, and demands for environment sustainability. Current industrial production of crotonic acid through petrochemical route has several drawbacks: i) non-renewable, as it is derived ...

Oxidation of crotonaldehyde to crotonic acid is an important chemical reaction process because crotonic acid, its derivative and copolymer are ubiquitous in the productions of chemical, cosmetic, and medicines. However, the reactor safety and process efficiency are still not satisfactory. In ord...

In-situ high pressure Raman spectra of crotonic acid have been measured up to 14 GPa, a possible solid–solid phase transition was detected at about 6 GPa from the frequency–pressure relationship. According to the relative intensity changes of typical Raman peaks, the inter-molecular hydrogen b...

Capacitive deionization (CDI) was developed for desalination of brackish water. In contrast to ion exchange, CDI is based on the accumulation of ions within the electrical double layer formed at the surface of conductive materials when an electrical potential is applied. Ion adsorption and desor...

In this study, Y. lipolytica was engineered to produce crotonic acid via the butanol-forming route. Firstly, the crotonase and 3-hydroxybutyryl-CoA dehydrogenase genes from Clostridium beijerinckii, and the thioesterase gene from Bacteroides thetaiotaomicron were heterologously expressed in Y. l...

A simple and one-pot approach for the synthesis of highly functionalized novel (E)-2-benzylideno-(Z)-carbazolylideno cyanoacetamide derivatives from different 2-(2′,3′,4′,9′-tetrahydro-carbazol-1′-ylidene)-propanedinitriles and aryl/heteroaryl carbaldehydes via vinylogous aldol reaction. Th...

The frequencies and absorption intensities of the five kinds of conformers of 1,3-butanediol with the same carbon skeleton (GG′) were calculated by anharmonic calculation for the fundamentals and first overtones of OH stretching vibrations. The four kinds of conformers form intramolecular hydro...

Vapor-phase catalytic dehydration of 2,3-butanediol (2,3-BDO) was investigated over rare earth oxide catalysts and In2O3 at around 400 °C. In the dehydration of 2,3-BDO over Sc2O3, 1,3-butadiene was mainly produced together with butanone, 2-methyl-propanal, 2-methyl-propanol, 3-buten-2-ol, and ...

Vapor-phase dehydration of 3-methyl-1,3-butanediol to 3-methyl-3-buten-1-ol was investigated over carbon-modified alumina, C/Al2O3, which was prepared by depositing carbonaceous species, i.e. coke, on Al2O3 with contacting Al2O3 surface with 3-methyl-1,3-butanediol vapor at 250 °C. Temperature-...

Liquid–liquid equilibrium of the system limonene + linalool + 1,3-butanediol has been studied at two different temperatures. The obtained data were satisfactorily correlated with the NRTL activity coefficient model, in order to obtain the binary interaction parameters of the mixture. Later on, ...