Article
Chemistry, Physical
Qin Jiang, Luo-Peng Xu, Li-Li Wang, Jia-Zheng Wang, Lei Zhang, Lu Zhang
Summary: The dilational properties of two anionic surfactants at the air-water and decane-water interfaces were investigated. The effects of aging time, oscillating frequency, bulk concentration, and surface/interfacial pressure were explored. The results show that different processes control the properties of surface/interfacial films at low and high concentrations. The insertion of oil molecules disrupts the interactions between alkyl chains and affects the dilational properties.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Biochemistry & Molecular Biology
Qi Sun, Zhicheng Xu, Qingtao Gong, Wangjing Ma, Zhiqiang Jin, Lei Zhang, Lu Zhang
Summary: The dilational rheology properties of two hydroxyl-substituted alkylbenzene sulfonates were investigated at the gas-liquid and oil-water interfaces. The length of the hydroxyl para-alkyl chain was found to affect interfacial behavior, with strong intermolecular interaction observed at the gas-liquid interface. The presence of oil molecules hindered interface tiling at the oil-water interface, resulting in reduced dilational viscoelasticity.
Article
Biochemistry & Molecular Biology
Agnieszka Czakaj, Ewelina Jarek, Marcel Krzan, Piotr Warszynski
Summary: Ethyl lauroyl arginate (LAE) is a commonly used food preservative and component in food packaging, with low toxicity and antimicrobial activity. Research analyzed the surface activity mechanism of LAE, determining the preferred hydrolysis path and the possibility of forming highly surface-active heterodimers through quantum mechanical computations and molecular dynamics simulations.
Article
Chemistry, Physical
Ning-kai Shu, Zhi-cheng Xu, Qing-tao Gong, Wang-jing Ma, Lei Zhang, Lu Zhang
Summary: This study investigates the adsorption and dilational rheological properties of branched cationic surfactant at the air-water interface in the presence of NaCl. The results show that the addition of NaCl influences the nature of the film and dilational viscosity, with a more significant impact at higher NaCl concentrations. Overall, the presence of electrolyte transforms the elastic adsorption film into a viscoelastic one.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Biophysics
Hashem Ahmadi Tighchi, Mohammad Hasan Kayhani, Ali Faezian, Samira Yeganehzad, Reinhard Miller
Summary: Licorice (Glycyrrhiza glabra) is a useful plant in the Fabaceae family with sweet-tasting roots. The root extract of licorice contains natural surfactants and shows promising potential in reducing surface tension and improving foam properties. This study investigates the surface tension, rheology, foamability, and foam stability of licorice root extract (LRE) and aims to contribute to the development of commercial applications involving foams.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Energy & Fuels
Peter L. Perez, Jenee' N. Zaragoza, Nimeshkumar K. Patel, Michael A. Dion
Summary: The use of crude stabilizers is an important chemical tool for refining unstable crude oil blends. Research has found that the ability of crude stabilizers to enhance demulsifier activity is mainly related to reducing interfacial viscosity rather than inhibiting asphaltenes. Interfacial dilatational experiments can capture the synergistic interactions between demulsifiers and certain crude stabilizers, making it a useful tool for selecting the best demulsifier/crude stabilizer combination.
Article
Chemistry, Physical
M. Dabestani, S. Yeganehzad, R. Miller
Summary: Chubak, a shrubby plant with saponin-rich roots, has potential as a natural surfactant source. Research on the surface activity of Chubak root extract and purified saponin showed a consistent trend, but the purification method was found to be inefficient in separating the complete saponin content.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Environmental Sciences
Huixin Wang, Xiaoou Wang, Meiyan Wang, Changping Zhang, Jiayin Li, Ming Xue, Weiyi Xia, Haijiao Xie
Summary: This study investigated the degradation and transformation of linear alkylbenzene sulfonates (LAS) in integrated constructed wetland-microbial fuel cell (CW-MFC) systems. Results showed that sodium dodecyl benzene sulfonate (SDBS) could improve the power output and reduce the internal resistance of CW-MFCs, but high concentration of SDBS had the potential to inhibit electricity generation and organics biodegradation due to its toxic effects. SDBS degradation in CW-MFCs involved alkyl chain degradation, desulfonation, and benzene ring cleavage, producing 19 intermediates. The bioaccumulation potential of SDBS was greatly reduced through the degradation by CW-MFCs, reducing its environmental risk.
Article
Chemistry, Physical
Van Nho Tran, Johann Eduardo Maradiaga Rivas, Siam Hussain, Wen-Chi Tseng, Alexander Akentiev, Boris Noskov, Giuseppe Loglio, Shi-Yow Lin
Summary: The dynamic and equilibrium surface tensions of Human Serum Albumin (HSA) and Bovine Serum Albumin (BSA) solutions were compared in this study, along with the dilational modulus of the adsorbed films. The results showed that HSA had a faster relaxation in dynamic surface tension compared to BSA, while the equilibrium surface tension remained constant for both HSA and BSA at different concentrations. The dilational modulus of the films exhibited similar concentration dependency for HSA and BSA.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Peter Alexander Wierenga, Elke Simeonova Basheva, Roy Jozef Bernard Marie Delahaije
Summary: This study explores differences in foam stability observed among similar beer samples from different breweries and finds that these differences are primarily attributed to differences in coalescence. The foam stability varies among samples, but the ranking is consistent across different foaming methods, indicating its independence from other factors. The measured interfacial or bulk properties cannot account for the differences, suggesting the need for new experimental and theoretical methods to better understand foam stability.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Anna Y. Gyurova, Kaloyan Berberov, Alexander Chinarev, Ljubomir Nikolov, Daniela Karashanova, Elena Mileva
Summary: The study developed a fine-tuning procedure for the entrapment of trace quantities of LPS by optimizing the pH values of the aqueous systems. It was found that T4 may be effective in capturing and removing traces of endotoxins in aqueous systems.
Article
Biophysics
B. A. Noskov, A. V. Akentiev, A. G. Bykov, G. Loglio, R. Miller, O. Yu. Milyaeva
Summary: The properties of adsorbed layers of protein fibrils and the spread layers on an aqueous subphase differ significantly. The surface elasticity of Lysozyme (LYS) and 8-lactoglobulin (BLG) spread layers on the surface of 0.1 M NaCl solution is more than two times higher than protein solutions with the same NaCl concentration, possibly due to lower surface concentrations of hydrolysed peptides in the latter case. The properties and morphology of the spread and adsorbed layers depend noticeably on the ionic strength of the aqueous bulk phase, especially for LYS layers which are more prone to the formation of macroscopic and mesoscopic surface aggregates compared to BLG layers.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Physical
Chengjiao Li, Aijun Wu, Ziqi Zhao
Summary: In this study, the effects of anionic polymers (such as sodium alginate) and polyvinyl alcohol on the foam properties of dodecyl dimethyl betaine (BS-12) were investigated. The results showed that low concentrations of anionic polymers improved the foam stability of BS-12, while high concentrations had little effect on the foam performance of BS-12.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Jun Luo, Eric Amenyogbe, Jian-sheng Huang, Gang Chen
Summary: This study used hybrid grouper as a model to investigate the effects of quercetin and sodium quercetin-5'-sulfonates on serum biochemistry, hepatic lipid accumulation, and metabolite changes. The results showed that these additives can reduce blood lipid levels and liver fat accumulation.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Chemistry, Physical
Dimitrinka Arabadzhieva, Anna Y. Gyurova, Ivan Minkov, Alexander Chinarev, Elena Mileva
Summary: This study investigates the smart regulation of properties of aqueous solutions of two-antennary oligoglycines molecules through variations in pH and initial incubation time. The results show that the size distribution of tectomers is bimodal in acidic conditions and becomes mono-modal in alkaline conditions, with the dimensions of tectomers shifting towards larger entities as pH increases. These trends are further enhanced with longer incubation times. The study provides essential insights into the coupling mechanism of bulk and interfacial phenomena, laying the groundwork for further fine-tuning of tectomer formation and potential applications in drug nanocarriers and impurity extraction from water media.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
