The present study investigates the tribological properties of nanolubricants dispersed with dodecylamine functionalized graphene (DAG) in commercial engine oil. Standard techniques were used to determine the morphology of the DAG and the worn surfaces. The tribological properties of the nanolubr...
Long-chain primary amines are not only good collectors for silicate minerals, but, they can also float some metallic sulfides. However, the flotation mechanism of sulfide minerals using long-chain primary amines as collector is uncertain. In this paper, the flotation performance and adsorption m...
The hydrophobic aggregation in cationic surfactant suspension is an effective method to enhance the dewatering of clay-rich tailing. The solution pH can affect the adsorption behavior of cationic surfactant on clay mineral. The effect of pH on the adsorption of dodecylamine (DDA) on montmorillon...
The adsorption kinetics of the partially protonated cationic surfactant dodecylamine (C12H27N) in a 50 mM NaCl solution was examined. The dynamic and equilibrium surface tensions (STs) were measured using a video-enhanced pendant bubble tensiometer with a modified cell system. The equilibrium an...
The interaction of hydrophobic modifiers with clay mineral surfaces plays an important role in the hydrophobic aggregation sedimentation for the treatment of clay-rich tailing. The adsorption of dodecylamine and oleic acid on kaolinite was investigated at the atomic level by using density functi...
Besides being a versatile mineral resource, quartz is also a common gangue mineral in mineral separation. The separation and enrichment of quartz minerals are particularly important in industrial production. Cationic surfactants of dodecylamine (DDA) is mainly used as collector in the quartz flo...
Enantiomerically pure 3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazol-4-amine 14a and 3,5-bis[(1S)-1-ethoxyethyl]-4H-1,2,4-triazol-4-amine 14b were used as chiral auxiliaries to obtain enantiomerically enriched α-aminoacetals, primary alkyl and arylalkyl amines (ee ranging from 40% to 90%). The d...
The corrosion inhibition and adsorption behavior of spermidine on mild steel (MS) in 1 M sulfuric and 0.50 M hydrochloric acid have been investigated at room temperature by electrochemical methods viz., electrochemical impedance spectroscopy (EIS) and Tafel polarization techniques. The adsorptio...
Xinjiang ‘Saimaiti’ apricots in the green ripe stage were used as the experimental materials. The apricots were treated with spermidine (Spd) and d-arginine (D-Arg). Fruit firmness, ethylene production, 1-aminocyclopropane-1-carboxylic-acid (ACC) synthase activity, ACC oxidase activity and gen...
Aerva javanica is an exotic medicinal plant widely distributed in India. It possesses numerous medicinal benefits. The present study was aimed to in vitro regenerate the explants of Aerva javanica, and to quantify the components of secondary metabolites (using high performance liquid chromatogra...
To understand the physiological functions of polyamine oxidases (PAOs) in plants, we analyzed the effects of exogenous polyamines during seed germination and early seedling development, using Arabidopsis thaliana lines independently harboring T-DNA insertions in each PAO gene. Spermine caused se...
Changes in mitochondrial structure and function are the initial factors of cell aging. Spermidine has an antiaging effect, but its effect on neuronal aging and mitochondrial mechanisms is unclear. In this study, mouse neuroblastoma (N2a) cells were treated with d‑galactose (d‑Gal) to establish c...
A terphenyl derivative 3 has been designed and synthesized which undergoes self-assembly in mixed aqueous media to form weakly emissive aggregates. Aggregates of derivative 3 selectively detect spermidine and exhibit spermidine-induced emission enhancement. The interactions between aggregates of...
Helicobacter pylori is the primary pathogen associated to gastritis and gastric cancer. Growth of H. pylori depends on the availability of spermidine in vivo. Interestingly, the genome of H. pylori contains an incomplete set of genes for the classical pathway of spermidine biosynthesis. It is th...
AimsAgeing is associated with cardiovascular disease and reduced cardiac function. This cardiac functional decline is accompanied by cardiac remodeling and alterations in cardiomyocyte composition. Recently, it was shown that the natural polyamine spermidine preserves cardiac function and cardio...
In this study, the impact of spermidine on the stability, conformation and activity of elastase was investigated at the pH of 8.5 (the optimum pH for elastase) and different temperatures (303, 313, and 323 K) using UV–vis spectrophotometry, Spectrofluorimetry, circular dichroism, and enzyme act...
The hydroformylation reaction in supercritical carbon dioxide or CO2-expanded liquids (CXLs) has many advantageous properties. However, accurate phase behavior and equilibrium must be known to properly understand and engineer these systems. In this investigation, the vapor–liquid equilibrium an...
A two-step process was demonstrated for the conversion of 1-butene to n-nonanal with an overall reaction selectivity of 70.8%. The process consists of a dimerization step over a heterogeneous carbon-supported cobalt oxide catalyst to a mixture of oligomers, consisting primarily of internal linea...
RP-3 kerosene is the most important hydrocarbon fuel used in civilian airplanes in China. Up to date, there are few experimental literatures on soot formation and oxidation of RP-3 kerosene available. In this experimental study, the evolution, nanostructure, and oxidation reactivity of the soot ...
Two series of pure SAPO-11 silicoaluminophosphates (S11-B(x) and S11-P(x)) with different SiO2/Al2O3 molar ratios are synthesized by employing Di-n-butylamine (DBA) and Di-n-propylamine (DPA) templates, respectively. The effects of templates on the physicochemical properties of SAPO-11 samples a...
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