Journal of oleo science最新文献

Surface activity parameters such as critical micelle concentration (CMC), saturation adsorption (Г_max), and limiting molecular area (A_min) of three triazinyl bisquaternary ammonium salts with different hydrophobic chain lengths (C₆-2-C₆, C₈-2-C₈ and C₁₂-2-C₁₂) were analyzed from surface tension tests. The results showed that the CMC value of C₁₂-2-C₁₂ was much lower (0.026 mmol/L) than that of C₆-2-C₆ and C₈-2-C₈. The corrosion inhibition performances of three triazinyl bisquaternary ammonium salts on Q235 in 1 mol/L HCl solution were investigated by weight loss measurements and electrochemistry measurements. The results showed that the longer the hydrophobic chain length, the better the corrosion inhibition performance at the same concentration. The corrosion inhibition efficiencies of C₁₂-2-C₁₂, C₈-2-C₈ and C₆-2-C₆ at 0.2 mmol/L were 98.10%, 96.09% and 94.64%, respectively. Surface analysis and quantum chemical calculations showed that the three triazinyl bisquaternary ammonium salts can be adsorbed on the surface of carbon steel effectively to inhibit the corrosion of the carbon steel surface.

In this study, the phenolic compound profile, antioxidant capacity, and inhibition potential on enzymes associated with diseases such as Alzheimer's disease (AD) and diabetes of Plantago lanceolata L. (PL) extract were investigated in detail. Quantitative analysis of phenolic compounds was performed by advanced liquid chromatography-tandem mass spectrometry (LC-MS/MS), and the highest concentration of the phenolic was observed in fumaric acid (4486.80 µg/L). Vanillic acid, kaempferol, resveratrol and caffeic acid were also detected in significant amounts. The antioxidant activities of PL ethanol extract were determined by DPPH, ABTS, FRAP, and CUPRAC methods and revealed moderate radical scavenging and metal-reducing capacities. The PL extract exhibited notable free radical scavenging activity, with inhibition rates of 37.86 ± 2.42% in the DPPH assay and 34.72 ± 2.86% in the ABTS assay. These results revealed that the extract showed an activity close to standard antioxidants such as α-tocopherol. The extract exhibited inhibitory activity against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and α-glucosidase enzymes, with IC₅₀ values of 8.77 ± 0.52, 7.37 ± 0.53, and 3.63 ± 0.27 µg mL-1, respectively. These findings may indicate that PL extract may have therapeutic potential for disorders such as Alzheimer's disease and diabetes.

The incorporation of molecular assemblies into hydrogels for transdermal delivery applications may affect their morphology and the dynamics of their constituent molecules; however, such effects have not been thoroughly investigated. In this study, we used bicellar mixtures composed of DPPC and DHPC as a model system to evaluate structural changes and reversibility within agarose hydrogels using depolarized dynamic light scattering (DDLS), a non-destructive method capable of analyzing morphologies of samples dispersed in an aqueous solution. To verify the performance of the DLS apparatus, standard particles and synthetic mica were measured, confirming that sufficient scattering intensity could be obtained even at an agarose concentration of 0.5 mass%. We investigated DPPC vesicles and DPPC/DHPC bicellar mixtures in aqueous solution and agarose gel, analyzing their translational and rotational diffusion coefficients. By applying a morphology-sensitive correction factor α, the aspect ratio (AR) of the bicellar assemblies was estimated to be approximately 2.0. The major and minor axes of the DPPC/DHPC bicelle mixtures were 40.0 nm and 20.0 nm in aqueous solution, and 32.7 nm and 15.0 nm in agarose gel, respectively. These differences may indicate stacking of multiple bicellar mixtures, which is consistent with the TEM image observations. In addition, although the structural transformation of bicellar mixtures in agarose gels occurred more slowly than in aqueous solution, changes induced by external stimuli (e.g., heating and stirring) and their partial reversibility were observed. These findings demonstrate that DDLS is a useful technique for evaluating the structural stability and responsiveness of molecular assemblies within agarose hydrogels, providing valuable insights for the future design of gel-embedded drug delivery systems.

Camellia oleifera seed oil (COSO), a nutritionally rich oil from a key southern Chinese woody crop, has gained significance in food, cosmetic, and pharmaceutical fields. This review summarizes its high-value products, extraction technologies, chemical composition, and health benefits. High-value products include crude COSO and refined COSO, with by-products such as seed meal and shells that yield bioactive compounds for animal feed, fertilizers, and nutraceuticals. Extraction methods range from traditional mechanical pressing and solvent extraction to innovative approaches like supercritical CO₂ extraction and enzyme/ultrasound/microwave-assisted techniques. Chemically, COSO features a balanced fatty acid profile dominated by oleic acid (52.13%-86.6%), along with abundant phytosterols, squalene, α-tocopherol, and phenolic compounds, which collectively enhance its oxidative stability and antioxidant activity. Health benefits include antioxidative and anti-inflammatory effects, cardiovascular protection, neuroprotection in Alzheimer's disease, anti-fatigue properties, antimicrobial activity, and osteoporosis prevention via mechanisms like NF-κB signaling modulation. In conclusion, COSO and its by-products offer nutritional, industrial, and therapeutic value, with innovative technologies promoting sustainability. Further research on large-scale optimization and by-product utilization is needed to fully exploit their potential in functional foods and healthcare.

Brain-derived neurotrophic factor (BDNF), a neurotrophic factor essential for brain function, is also produced in the kidneys and reportedly exerts kidney protective effects. However, whether renal BDNF levels decrease in chronic kidney disease (CKD) remains elusive. To investigate how CKD affects renal BDNF levels, we used an adenine-induced murine CKD model. Administration of 0.1% adenine solutions via free drinking for 1 week resulted in a marked reduction of BDNF expression in the kidneys. Our results suggest that CKD progression reduces kidney BDNF levels and that this model could be useful for developing BDNF-targeted strategies for CKD prevention and therapy.

Antibiotic resistance is a world wide problem mainly in developing countries. In this work, coelomic fluid (PCF) and paste (PBP) of Pheretima posthuma was assessed for its potential as antibiofilm and anti-quorum sensing (QS) agent against pathogenic bacterial biofilms. PCF and PBP were extracted and biofilm formation time kinetics was examined using crystal violet staining method by utilizing four bacterial isolates in bispecies biofilm (06 combinations; MH5-MH10) and multi species biofilms (05 combinations; MH11-MH15). QS study was performed by determining pyocyanin formation time kinetics using 03 P. aeruginosa strains at various time periods (0, 24, 48, 72, 96 and 120 hours). Following next, anti- QS effect was analyzed by measuring pyocyanin concentrations. Results showed that among bispecies bacterial biofilms, MH5-MH7 combinations showed significantly higher biofilm (p < 0.05) after 72 hours while other three (MH8-MH10) produced maximum biofilm after 48 to 72 hours. Likewise, for multispecies biofilms, maximum biofilm was noted after 48-72 hours. QS analysis revealed that PA1 strain synthesized highly significant (p < 0.001) pyocyanin (20 µg/mL) after 96 hours compared to PA2 and PA3 strains, which formed significant pyocyanin (18 µg/mL) after 72 hours. Also, 100-150 µg/mL of both PCF and PBP exhibited a significant (p < 0.05) reduction in biofilm while 200 µg/mL concentration showed highest QS against all selected strains. To our knowledge, this is the first assessment of its kind on the potential application of earthworm PCF and PBP for its antibiofilm and anti-QS potential. The study recommends precise chemistry of bioactive agents and their probable mechanism(s) of actions for the observed interference. Also, new pharmaceutical drugs synthesized using bioactive agents from PCF and PCB may surely have the potential to manage different infection problems caused by bacterial biofilms.

Adding of vegetable oils to skincare products or the use of plant oils for oil care is a current trend. Therefore, the safety and functionality of vegetable oils are of great concern to consumers and cosmetics manufacturers. This study focused on three types of vegetable oils: sunflower oil (SO), andiroba oil (AO) and hydrogenated olive oil (HOO). We conducted a comprehensive evaluation of the oils, which encompassed their ability to protect mouse skin keratinocytes (XB-2) and mouse fibroblasts (NIH 3T3) from damage caused by the surfactant sodium lauryl sulfate (SLS), their influence on the levels of filaggrin and collagen, their potential to aid in wound healing, and their effectiveness in anti-Staphylococcus aureus biofilm formation. The results showed that SO, AO and HOO at a concentration of 1.5 × 10^-4 % (v/v) have the ability to defend against SLS-induced cell damage, increase wound healing ability and the filaggrin and collagen content to XB-2 or NIH 3T3 cells. SO, AO and HOO at a concentration of 3.75 × 10^-3 % also have the anti-biofilm ability. Among the oils, AO can inhibit S. aureus biofilm composed of either polysaccharides or proteins. Therefore, the tested vegetable oils and can be applied to the cosmetics field as ingredients to repair damaged skin and preserve skin barrier stability.

In the present study, the mixed micellization behavior of gemini surfactant-1, 5-bis (N-hexadecyl- N, N-dimethylammonium) pentane dibromide (G5) with non-ionic surfactant triton X-100 (TX-100) was investigated in the micellar phase by utilizing the conductometric technique. The deviation of ideal critical micelle concentration (cmc*) from experimental critical micelle concentration (cmc) has been estimated using well-known Clint's theory of mixed micelles. The regular solution approximation was used to determine the interaction parameter (β) and found to be negative. The negative values of β at all mole fractions confirm an attractive interaction between two mixed components. The activity coefficients and excess Gibbs free energy of mixed micelles have been calculated by using different approximations, like Rubingh, Lange and Motomura. Counterion binding (g) computed from the post and premicellar slopes of specific conductance vs. concentration graph. Overall, in most of cases, in presence of TX-100, the counterion binding of gemini surfactant was found to be less in magnitude. The molecular interaction was also investigated by the density function theory (DFT). A polarizable continuum model (PCM) was used (with water as a solvent) to optimize the single surfactants and their mixture. The computational process was carried out by the B3LYP method and the 6-31G basis set.

Bile salts, present in the gastrointestinal tract as biosurfactants, play a crucial role in emulsifying and solubilizing fat-soluble nutrients and drugs, thereby facilitating their absorption. However, the cellular permeation of bile acid-mixed micelles solubilized with lipophilic substances remains inadequately explored. To comprehend the cell permeation behavior of bile salts and their mixed micelles, giant unilamellar vesicles (GUVs) were employed as a cell-mimetic system, prepared with dioleylphosphatidylcholine (DOPC). Confocal laser scanning microscopy, utilizing fluorescent dyes doped in the lipid membrane and solubilized substances, was employed to observe morphological changes in GUVs subsequent to the application of sodium cholate (NaC) alone and NaC-mixed micelles solubilized with lipophilic components. In the case of NaC alone, below the critical micelle concentration (CMC), the monomer interacts with the lipid membrane of the GUV, inducing endocytic morphological changes that result in the formation of small vesicles containing the bulk liquid inside the GUV. Conversely, when both monomers and micelles interacted with the lipid membrane beyond the CMC, lipid aggregates such as buds and threads protruded outward from the GUV. Contrastingly, upon application of three types of NaC mixed micelles-NaC-P solubilized with Palmitoyloleoylphosphocholine (POPC), NaC-P-F solubilized with oleic acid (OA) and monoolein (MO), and NaC-P-P solubilized with perylene, a liposoluble dye-to the GUV, the lipid membranes formed aggregates or vesicles and migrated into the interior of the GUV. In the case of NaC-P and NaC-P-P, the coexistence of drawn lipid aggregates and solubilized substances was scarcely observed. In contrast, for NaC-P-F, the coexistence of solubilized substances was observed in both lipid aggregates and small vesicles that migrated into the GUV. It is suggested that the partitioning of the solubilized substance from the mixed micelles adsorbed on the GUV to the lipid bilayer is implicated in the permeation of the solubilized substance through the cell membrane.