Article
Chemistry, Physical
Raphael da Silva Alvim, Caetano Rodrigues Miranda
Summary: In this study, first-principles calculations were used to determine the adsorption energy of propanoic and octanoic acids on calcite and dolomite surfaces under low salinity water conditions. The results showed that the adsorption selectivity of acidic oil components was lower on magnesium sites, while calcium sites retained the acid molecules more effectively. The influence of the carbonate surfaces was enhanced in the presence of an aqueous environment. Additionally, the aqueous environment may predominantly affect the unoccupied electronic levels of dolomite carbonate sites, resulting in a stronger interaction with the acid molecules. The size of the acid chain had a less pronounced effect. The desorption of the acid molecules could occur from the carbonate sites, especially in dolomite, due to increased surface hydrophilicity and favorable ionic exchange and water adsorption. Overall, these simulation models provide important insights into the interaction properties of complex water-oil-carbonate interfaces under low salinity water conditions for enhanced oil recovery.
APPLIED SURFACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Shaobin Zhang, Claudia Contini, James W. Hindley, Guido Bolognesi, Yuval Elani, Oscar Ces
Summary: The authors have reported a biocompatible all aqueous emulsion system with motion induced by the Marangoni effect, showing negative chemotaxis. This system offers new possibilities for research in motion-related biological processes with its biocompatibility, motility, and partitioning abilities.
NATURE COMMUNICATIONS
(2021)
Article
Nutrition & Dietetics
Anouk Charlot, Lucas Morel, Anthony Bringolf, Isabelle Georg, Anne-Laure Charles, Fabienne Goupilleau, Bernard Geny, Joffrey Zoll
Summary: This study found that consuming a diet rich in octanoic acid (C8) can enhance spontaneous activity and endurance capacity in mice. The C8-rich diet also affects the metabolic phenotype of skeletal muscle, increasing the number of oxidative fibers rich in mitochondria. At the molecular level, the C8 diet activates AMPK and increases the expression of PGC1a and CS genes and proteins. These findings suggest that C8-enrichment improves endurance capacity and activates mitochondrial biogenesis pathways, leading to higher oxidative capacities in skeletal muscle.
Article
Biotechnology & Applied Microbiology
Josef Licek, Mojmir Baron, Jiri Sochor, Michal Kumsta, Jiri Mlcek
Summary: This study focused on the application of a patented medium-chain fatty acids mixture at the end of alcoholic fermentation and monitored its residues. The results showed that the use of the investigated mixture at doses of 10 and 20 mg/L did not have a negative impact on the quality and sensory properties of the wine, making it a safe alternative.
FERMENTATION-BASEL
(2022)
Article
Chemistry, Applied
Laura Boetje, Xiaohong Lan, Fitrilia Silvianti, Jur van Dijken, Michael Polhuis, Katja Loos
Summary: This study presents a series of starch esters synthesized through transesterification reactions catalyzed by TBD in DMSO. By purging the reaction flask with nitrogen, the degree of substitution was increased. Long-chain fatty acids exhibited the most significant increase in DS, while starch esters from unsaturated fatty acids showed lower Tg and higher hydrophobicity compared to pristine starch.
CARBOHYDRATE POLYMERS
(2022)
Article
Microbiology
Hui Guo, Wei Yang, Bingshuang Lei, Fengju Zhao, Lili Guo, Junqing Qian
Summary: Food safety is a significant concern worldwide, making the prevention of food contamination crucial. A study successfully prepared an antimicrobial nanoemulsion using water-soluble nisin and fat-soluble octanoic acid. The nanoemulsion exhibited outstanding antimicrobial effects against Escherichia coli and Staphylococcus aureus with smaller amounts of nisin and octanoic acid required. The study's findings may guide the future application of nisin in different forms.
ARCHIVES OF MICROBIOLOGY
(2023)
Article
Chemistry, Physical
Keaten Kappes, Benjamin N. Frandsen, Veronica Vaida
Summary: This study investigates the vibrational spectra of Alpha-keto acid 2-oxo-octanoic acid (2OOA) in different phases. Two different conformers are identified in the gas phase, and an intermolecular hydrogen bonding scheme is proposed for the solid phase. At the air-water interface, hydrocarbon tails interact with each other, while carbonyls interact with water but not with neighboring molecules.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Biochemical Research Methods
Leonie Baumann, Stefan Bruder, Johannes Kabisch, Eckhard Boles, Mislav Oreb
Summary: The study focuses on microbial biosynthesis of octanoic acid through yeast, utilizing a biosensor for high-throughput screening of new genetic targets and successfully identifying KCS1 and FSH2 as genes that can increase octanoic acid titers.
ACS SYNTHETIC BIOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Hui Wang, Zixiang Wei, Sergei Vagin, Xuehua Zhang, Bernhard Rieger, Alkiviathes Meldrum
Summary: This study presents a fluorescent-droplet-based acid-sensing scheme with detection limits below 100 pM for weak acids, demonstrating excellent sensing performance. Interactions with the sensor dye are likely responsible for the enhanced equilibrium partitioning observed.
Article
Biology
Jinjoo Jung, Jongbeom Park, Mingi Kim, Jaeyoung Ha, Hana Cho, Seung Bum Park
Summary: The small molecule SB2301 activates lipophagy and alters lipid droplet membrane composition, with the ethanolamine-phosphate cytidylyltransferase 2 (PCYT2) being a potential target of the compound. The excessive accumulation of lipid droplets is associated with various diseases, and understanding the molecular mechanism of LD degradation is important for academic and industrial research. Lipophagy, a selective autophagy process, has gained attention in the research community. This study reveals a novel lipophagy mechanism through the use of SB2301, which activates ubiquitin-mediated lipophagy. The potential target protein PCYT2 is identified, and SB2301 induces PCYT2 translocation to the LD surface and alters the LD membrane composition, leading to the activation of the lipophagy process.
COMMUNICATIONS BIOLOGY
(2023)
Article
Chemistry, Physical
Jialei Li, Bin Pei, Zhicheng Liu, Xiang Gao, Shuai Ning, Zi Cai, Ruizeng Liu
Summary: This study evaluates the effectiveness of sodium sulfide (Na2S) as a selective depressant in the reverse flotation of calcite from smithsonite and examines the underlying mechanism. The results show that Na2S can strongly depress smithsonite but not calcite when a fatty acid collector is used. The study proposes a selective depression mechanism based on these findings.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Chemical
Evelyne A. Parmentier, Gregory David, Pablo Corral Arroyo, Simone Bibawi, Kivanc Esat, Ruth Signorell
Summary: The photodegradation of optically trapped oleic acid droplets by visible light was studied, showing that the oxygen amount and droplet size have minimal influence on the reaction rate. However, higher laser power and shorter wavelength significantly increased the reaction rate, suggesting that mechanisms involving the photoexcitation of oleic acid are dominant pathways. This study highlights the importance of considering direct photodegradation when using optical traps or spectroscopic methods to study aerosol particles containing fatty acids.
JOURNAL OF AEROSOL SCIENCE
(2021)
Article
Chemistry, Physical
Noemie Coudon, Laurence Navailles, Frederic Nallet, Isabelle Ly, Ahmed Bentaleb, Jean-Paul Chapel, Laure Beven, Jean-Paul Douliez, Nicolas Martin
Summary: All-aqueous microdroplets produced by liquid-liquid phase separation have been used as promising models of artificial cells and offer new methods for solvent-free encapsulation of fragile solutes. In this study, stable and impermeable water-in-water emulsions were constructed by the interfacial self-assembly of mixed sodium oleate/1-decanol bilayers on dextran-rich droplets. The lipid-based membrane was shown to be impermeable to oligonucleotides, proteins, and a low molecular weight dye.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Ewan W. Hislop, William J. Tipping, Karen Faulds, Duncan Graham
Summary: This study reports the application of k-means cluster analysis in microscopy for the segmentation of cellular organelles. By analyzing the SRS spectrum, the composition of different organelles can be directly compared. This method can be used for studying drug-cell interactions.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Ewan W. Hislop, William J. Tipping, Karen Faulds, Duncan Graham
Summary: Microscopy is a powerful imaging technique for analyzing biological systems. In this study, we demonstrated the application of k-means cluster analysis (KMCA) of multi-wavelength SRS images in the high-wavenumber region of the Raman spectrum for the segmentation of cellular organelles based on the intrinsic SRS spectrum. The combination of SRS imaging and KMCA provides a robust method for investigating drug-cell interactions in a label-free manner.
ANALYTICAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Jinglun Yang, Xiangquan Liu, Jiaqi Tang, Andra Dedinaite, Jianfei Liu, Rong Miao, Kaiqiang Liu, Junxia Peng, Per Martin Claesson, Xiaoyan Liu, Yu Fang
Summary: The study presents a scalable strategy for manufacturing defect-free nanofilms with a large area, showcasing high water flux and antifouling properties. These nanofilms exhibit promising applications in wastewater treatment and pharmaceutical concentration due to their outstanding mechanical properties and unique group-selective separation capability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Prasaanth Ravi Anusuyadevi, Ravi Shanker, Yuxiao Cui, Anastasia Riazanova, Mikael Jarn, Magnus P. Jonsson, Anna J. Svagan
Summary: Cellulose nanocrystals have the ability to form helical periodic structures, which generate structural colors preferentially reflecting left-handed circularly polarized light. By combining with a liquid crystal, the optical response can be modulated to achieve light reflection of both handedness with reversed spectral profiles. This study highlights the potential of hybrid cellulose systems to create advanced photoresponsive and polarization-tunable nanophotonics.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Natalia A. Wojas, Illia Dobryden, Viveca Wallqvist, Agne Swerin, Mikael Jarn, Joachim Schoelkopf, Patrick A. C. Gane, Per M. Claesson
Summary: The study of wear properties reveals that humidity has different effects on the wear resistance of bare calcite and stearic acid-modified calcite surfaces, with humidity decreasing the binding strength of stearic acid at high humidity and thus affecting wear characteristics.
Article
Chemistry, Physical
Kai Hettmann, Fabien W. Monnard, Gabriela Melo Rodriguez, Florentine M. Hilty, Selcuk Yildirim, Joachim Schoelkopf
Summary: This study employed a functionalized calcium carbonate porous coating to control the release of thyme and rosemary oil in a confined space. The results showed that the porous coating slowed down the release of volatiles, and a linear drive force model indicated that rosemary oil reached equilibrium faster than thyme oil. Temperature and degree of loading also played important roles in the desorption of the oils.
Review
Polymer Science
Xiaoyan Liu, Per M. Claesson
Summary: This review summarizes recent experimental investigations of interfacial lubrication properties of surfaces coated with bottlebrush bio-lubricants and bioinspired bottlebrush polymers. It also discusses recent advances in understanding intermolecular synergy in aqueous lubrication.
Article
Energy & Fuels
Erik Zall, Andreas Nordenstrom, Mikael Jarn, Jonatan Mossegard, Thomas Wagberg
Summary: Half of global energy consumption is dedicated to heating and cooling. Solar collectors offer a sustainable alternative to fossil fuels, with the receiver being a crucial component. In this study, a novel selective surface for low-to mid-temperature solar collectors is developed, utilizing a cobalt-chromium coating produced by electroplating and a trivalent chromium additive. This surface exhibits high solar-to-thermal efficiency and can be further improved with a protective silica top coating. The method is efficient, cost-effective, and environmentally friendly.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Energy & Fuels
Erik Zall, Mikael Jarn, Stefan Karlsson, Henrik Tryggeson, Mikko Tuominen, Mikael Sundin, Thomas Wagberg
Summary: This paper describes the development of antireflective mesoporous silica coatings on low-iron float glass using the aerosol-based nFOGTM deposition technique. The experimental results show that these coatings have the optimal thickness and improved antireflection effect, making them suitable for solar glass applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Multidisciplinary Sciences
Mimmi Eriksson, Per M. Claesson, Mikael Jaern, Viveca Wallqvist, Mikko Tuominen, Michael Kappl, Hannu Teisala, Doris Vollmer, Joachim Schoelkopf, Patrick A. C. Gane, Jyrki M. Maekelae, Agne Swerin
Summary: The formation of bridging gas capillaries and strong attractive interactions between superamphiphobic surfaces and hydrophobic microparticles in non-polar and low-surface-tension liquids have been revealed, which has significant implications for advanced functional materials development.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Natalia A. Wojas, Eric Tyrode, Robert Corkery, Marie Ernstsson, Viveca Wallqvist, Mikael Jarn, Agne Swerin, Joachim Schoelkopf, Patrick A. C. Gane, Per M. Claesson
Summary: A fundamental understanding of the interactions between mineral surfaces and amphiphilic surface modification agents is crucial for better control over the production and uses of mineral fillers. In this study, we successfully controlled the formation of carboxylic acid layers on calcite surfaces using vapor deposition and analyzed the properties of these layers using surface-sensitive techniques. We found that long hydrocarbon chain carboxylic acids can achieve low wettability, and the carboxylic acid layers gradually form a homogeneous layer with increasing vapor exposure time. The stability of the adsorbed layer increases with the chain length and packing density. Additionally, we discovered the interaction modes between the carboxylic acid layers and the calcite surface, as well as the conformation of the carboxylic acid molecules.
Article
Materials Science, Biomaterials
Piotr Beldowski, Maciej Przybylek, Damian Beldowski, Andra Dedinaite, Alina Sionkowska, Piotr Cysewski, Per M. M. Claesson
Summary: Understanding the interactions between hyaluronan and collagen is crucial for the function of joint cartilage and the treatment of joint diseases. The ratio of 3- or 4-hydroxy proline to proline residues affects the affinity of collagen for hyaluronan. Increasing the hydroxyproline/proline ratio in the collagen chain enhances the binding affinity for hyaluronan.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Chemistry, Physical
Sixuan Li, Lubica Macakova, Piotr Beldowski, Per M. Claesson, Andra Dedinaite
Summary: Phospholipids and hyaluronan are crucial biomolecules for the lubrication of articular joints, exhibiting excellent lubrication properties at micro- and nanoscale friction contacts. Our study demonstrates that phospholipids alone and in mixture with hyaluronan can significantly decrease friction forces on macroscopic rough surfaces, providing insights for developing aqueous-based lubrication systems.
COLLOIDS AND INTERFACES
(2022)
