Colloids and Interfaces最新文献_第2页

Facile Synthesis of PVP-Coated Silver Nanoparticles and Evaluation of Their Physicochemical, Antimicrobial and Toxic Activity pvp包覆银纳米粒子的快速合成及其理化、抗菌和毒性活性的评价

Colloids and Interfaces Pub Date : 2023-11-08 DOI: 10.3390/colloids7040066

Francisco N. Souza Neto, Leonardo A. Morais, Luiz F. Gorup, Lucas S. Ribeiro, Tassia J. Martins, Thayse Y. Hosida, Patricia Francatto, Debora B. Barbosa, Emerson R. Camargo, Alberto C. B. Delbem

{"title":"Facile Synthesis of PVP-Coated Silver Nanoparticles and Evaluation of Their Physicochemical, Antimicrobial and Toxic Activity","authors":"Francisco N. Souza Neto, Leonardo A. Morais, Luiz F. Gorup, Lucas S. Ribeiro, Tassia J. Martins, Thayse Y. Hosida, Patricia Francatto, Debora B. Barbosa, Emerson R. Camargo, Alberto C. B. Delbem","doi":"10.3390/colloids7040066","DOIUrl":"https://doi.org/10.3390/colloids7040066","url":null,"abstract":"This study focuses on the synthesis of silver nanoparticles (AgNPs) at different high concentrations and investigates their physicochemical properties, antimicrobial activity, and cytotoxicity. AgNPs were synthesized using the alcohol reduction process, involving the reduction of AgNO3 and its subsequent stabilization via PVP at 80 °C for 4 h. The AgNO3/PVP molar ratio and the average molecular weight were modified in this study. Characterization analyses revealed that the synthesized AgNPs exhibited characteristic surface plasmon resonance absorption peaks at approximately 415 nm, as observed in the UV–Vis spectrum. The results presented in X-ray diffractograms confirmed the face-centered cubic structure of metallic Ag in the nanoparticles. The nanoparticles demonstrated uniform size and shape, with controllable dimensions ranging from 3 to 800 nm. Regarding antimicrobial activity, the MIC solutions exhibited higher potency against the planktonic cells of Candida albicans. The determination of inhibition halos indicated that the silver nanoparticles had an impact on the microorganisms Streptococcus mutans, Candida albicans, and Actinomyces israelii. Furthermore, lower-concentration compositions showed reduced cytotoxic effects compared to higher-concentration particles. Based on the findings, it was concluded that the AgNO3/PVP molar ratio plays a crucial role in the production of AgNPs. These synthesized nanoparticles exhibit desirable physicochemical properties and demonstrate potential antimicrobial activity and controlled cytotoxicity.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"343 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135392332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Creation of Next-Generation Plant-Based Seafood Using Emulsion Gel Technology: Omega-3-Enriched Sea Foie Gras Analogs 使用乳液凝胶技术创造下一代植物性海鲜:富含omega -3的海鹅肝类似物

Colloids and Interfaces Pub Date : 2023-11-01 DOI: 10.3390/colloids7040065

Kanon Kobata, Zhiyun Zhang, David Julian McClements

{"title":"Creation of Next-Generation Plant-Based Seafood Using Emulsion Gel Technology: Omega-3-Enriched Sea Foie Gras Analogs","authors":"Kanon Kobata, Zhiyun Zhang, David Julian McClements","doi":"10.3390/colloids7040065","DOIUrl":"https://doi.org/10.3390/colloids7040065","url":null,"abstract":"Plant-based seafood analogs are gaining increasing popularity as replacements for traditional fish and other seafood products due to environmental (stock depletion, pollution, and bycatch issues) and health (bioaccumulated toxins, norovirus, and allergies) concerns associated with them. Several companies have launched plant-based fish products, but the market still lacks alternatives to shellfish and other sea delicacies. In this study, a plant-based sea foie gras (monkfish liver product) analog was developed using duckweed RuBisCO protein and omega-3-rich flaxseed oil to form emulsion gels. These gels consisted of a high concentration of flaxseed oil droplets dispersed within a gelled RuBisCO protein network. It was hypothesized that the high disperse phase volume fraction of the oil droplets and the heat-set gelation properties of the RuBisCO proteins would enable us to create emulsion gels that mimicked the properties of sea foie gras. A natural pigment (β-carotene) was incorporated into the oil phase of the emulsions to mimic the red-orange color of conventional sea foie gras. The structural, textural, and optical properties of real and plant-based sea foie gras analogs were characterized using scanning electron microscopy, confocal microscopy, dynamic shear rheology, texture profile analysis, and colorimetry. Emulsion gels prepared using 40% flaxseed oil and 10% RuBisCO proteins produced plant-based products that closely simulated the texture and color of the real products. Rheological analysis suggested that the oil droplets acted as active fillers within the protein gels. Our results suggest that emulsion gels may be used to create more sustainable and healthier plant-based seafood products.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"25 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135325414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Clove Oil Nanoemulsions: Evaluation of Antioxidant, Antimicrobial, and Anticancer Properties 丁香油纳米乳液的优化:抗氧化、抗菌和抗癌性能的评价

Colloids and Interfaces Pub Date : 2023-10-27 DOI: 10.3390/colloids7040064

José Nabor Haro-González, Brenda Nathalie Schlienger de Alba, Moisés Martínez-Velázquez, Gustavo Adolfo Castillo-Herrera, Hugo Espinosa-Andrews

{"title":"Optimization of Clove Oil Nanoemulsions: Evaluation of Antioxidant, Antimicrobial, and Anticancer Properties","authors":"José Nabor Haro-González, Brenda Nathalie Schlienger de Alba, Moisés Martínez-Velázquez, Gustavo Adolfo Castillo-Herrera, Hugo Espinosa-Andrews","doi":"10.3390/colloids7040064","DOIUrl":"https://doi.org/10.3390/colloids7040064","url":null,"abstract":"Clove essential oil is traditionally used as an anesthetic, analgesic, or insecticide, and recently, its applications as an antimicrobial, antioxidant, or anticancer agent have been explored. Nanoemulsions are thermodynamically unstable dispersions (d < 100 nm) produced by mixing two immiscible phases, which, in many cases, improve the stability and biological activities of functional ingredients for pharmaceutical, cosmetic, or food applications. This research optimized the formation of clove essential oil nanoemulsions by employing response surface methodology. The surfactant concentration was minimized by modifying the percentage of clove oil (0–100%), surfactant content (1–4%), and oil phase content (0–20%). In the optimum conditions, a nanoemulsion (93.19 ± 3.92 nm) was produced using 1.0% surfactant and 2.5% oil phase of which 50.7% was clove essential oil. The optimized nanoemulsion was stable in rapid stability tests (centrifugation, freezing–thawing, and heating–cooling), but its average droplet size increased during storage at different temperatures. The nanoemulsion contains a phenolic content equivalent to 736 mg gallic acid/mL. However, the antioxidant capacity of the essential oil (IC50 = 0.78 µg/mL) was dismissed in the nanoemulsion (IC50 = 2.43 µg/mL). The antimicrobial activity of the nanoemulsion showed strain–dependent behavior with MIC ranging from 0.0468 to 0.75 mg/mL, where E. coli and S. typhimurium were the most susceptible pathogenic bacteria. Finally, nanoencapsulation of clove oil showed higher in vitro cytotoxic activity against Caco–2 cancer cells (227 μg/mL) than free clove essential oil (283 μg/mL), but nanoemulsion (306 μg/mL) was less effective than oil (231 μg/mL) in the HT–29 line. This research shows the potential of clove essential oil nanoemulsions for developing biological therapies to treat diseases.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"15 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136234744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slow Rotation of Coaxial Slip Colloidal Spheres about Their Axis 同轴滑移胶体球绕轴缓慢旋转

Colloids and Interfaces Pub Date : 2023-10-12 DOI: 10.3390/colloids7040063

Min J. Tsai, Huan J. Keh

引用次数: 0

Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization 基于硅酸盐粉的可回收钾盐脱盐吸附剂:应用、再生与利用

Colloids and Interfaces Pub Date : 2023-10-11 DOI: 10.3390/colloids7040061

Akmaral B. Rakhym, Zarina Ye. Baranchiyeva, Aruzhan K. Kenessova, Bagashar B. Zhaksybai, Diana N. Dauzhanova, Yitzhak Mastai, Gulziya A. Seilkhanova

{"title":"Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization","authors":"Akmaral B. Rakhym, Zarina Ye. Baranchiyeva, Aruzhan K. Kenessova, Bagashar B. Zhaksybai, Diana N. Dauzhanova, Yitzhak Mastai, Gulziya A. Seilkhanova","doi":"10.3390/colloids7040061","DOIUrl":"https://doi.org/10.3390/colloids7040061","url":null,"abstract":"Silicate mineral powders (SMP) from weathered granite soil from Kazakhstan are proposed for the desalination of potash brines containing sodium, potassium and chloride ions. Batch adsorption experiments using acid-treated silicate (AS) achieved a Na+/K+/Cl− recovery of ~13/28/6 mg/g. An isothermal study best fitted the Freundlich and Dubinin–Radushkevich models for Na+ and K+/Cl−. The kinetic data were best modeled by pseudo-second-order kinetics for Na+/K+ and pseudo-first-order for Cl−. Thermodynamic calculations showed spontaneity under natural conditions. For Na+/K+, physisorption is accompanied by ion exchange. To study the possibility of sorbent reuse, several cycles of K+/Na+ adsorption–desorption were carried out under optimal conditions. AS selectively adsorbed potassium ions, maintaining a high effectiveness during five cycles providing K-form silicate fertilizers. Leachates of spent AS contain high concentrations of K/Na/Ca/Mg and other microelements essential for plants. Thus, SMP resolve two issues: the desalination of brine and the provision of fertilizer.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136210722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Temperature Variations on the Entrapment of Bacterial Endotoxins in Aqueous Solutions of Four-Antennary Oligoglycines 温度变化对四天线低聚甘氨酸水溶液中细菌内毒素捕获的影响

Colloids and Interfaces Pub Date : 2023-10-11 DOI: 10.3390/colloids7040062

Anna Y. Gyurova, Dimitrinka Arabadzhieva, Ivan Minkov, Ljubomir Nikolov, Elena Mileva

{"title":"Impact of Temperature Variations on the Entrapment of Bacterial Endotoxins in Aqueous Solutions of Four-Antennary Oligoglycines","authors":"Anna Y. Gyurova, Dimitrinka Arabadzhieva, Ivan Minkov, Ljubomir Nikolov, Elena Mileva","doi":"10.3390/colloids7040062","DOIUrl":"https://doi.org/10.3390/colloids7040062","url":null,"abstract":"Specific self-assembly is registered in aqueous solution formulations based on four-antennary oligoglycines (T4), namely a spontaneous onset of highly ordered nanostructures—tectomers. This phenomenon is initiated by the action of hydrogen-bonding interactions that promote molecular recognition propensities involving Polyglycine-II-type non-canonical architecture. The result is the formation of positively charged supramolecular entities. These have high potential to capture bacterial endotoxins, like lipopolysaccharides (LPSs). By now, it has been established that the overall properties of these systems can be precisely regulated and gradually changed through fine-tuning the parameters in the aqueous environment (composition, pH, etc.). One unexplored option is to clarify the impact of temperature variations. The aim of the present study is to implement systematic investigations on how changes in temperature influence the various options for the removal of trace LPS quantities, captured by the T4 tectomers. The additional goal is to verify the possibility to develop consecutive paths of recovering the extra T4 quantities that have not participated in the formation of T4+LPS complexes. Some prospects for further applications, e.g., in medicine and pharmaceutics, are also generally outlined.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136213039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Use of Soy and Egg Phosphatidylcholines Modified with Caffeic Acid Enhances the Oxidative Stability of High-Fat (70%) Fish Oil-in-Water Emulsions 咖啡酸修饰的大豆和鸡蛋磷脂酰胆碱提高了高脂肪(70%)鱼油水乳状液的氧化稳定性

Colloids and Interfaces Pub Date : 2023-09-18 DOI: 10.3390/colloids7030060

Betül Yesiltas, Pedro J. García-Moreno, Ann-Dorit M. Sørensen, Chiranjib Banerjee, Sampson Anankanbil, Zheng Guo, Peter R. Ogilby, Charlotte Jacobsen

{"title":"The Use of Soy and Egg Phosphatidylcholines Modified with Caffeic Acid Enhances the Oxidative Stability of High-Fat (70%) Fish Oil-in-Water Emulsions","authors":"Betül Yesiltas, Pedro J. García-Moreno, Ann-Dorit M. Sørensen, Chiranjib Banerjee, Sampson Anankanbil, Zheng Guo, Peter R. Ogilby, Charlotte Jacobsen","doi":"10.3390/colloids7030060","DOIUrl":"https://doi.org/10.3390/colloids7030060","url":null,"abstract":"This study investigated the effect of the combined use of sodium caseinate (CAS), commercial phosphatidylcholine (PC), and modified PCs on the physical and oxidative stability of 70% fish oil-in-water emulsions. Caffeic acid was covalently attached to both modified PCs (PCs originated from soy and eggs) in order to increase the antioxidant activity of PCs and investigate the advantage of bringing the antioxidant activity to the close proximity of the oil-water interface. Results showed that oxidative stability was improved when part of the PC was substituted with modified soy PC or egg PC. Emulsions containing a low concentration of modified PCs (10 wt.% of total PC) resulted in a prooxidative effect on the formation of hydroperoxides compared to emulsions with free caffeic acid. On the other hand, a decrease in the formation of volatile oxidation products was observed for emulsions containing higher levels of modified PCs (60 wt.% of total PC) compared to the emulsions with free caffeic acid added at its equivalent concentration. Increased concentrations of modified PCs provided better oxidative stability in high-fat emulsions, independent of the modified PC type. Moreover, when oxidation was initiated by producing singlet oxygen near a single oil droplet using a focused laser, fluorescence imaging showed that the oxidation did not propagate from one oil droplet to another oil droplet.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface Properties of Aqueous Dispersions of Bovine Serum Albumin Fibrils 牛血清白蛋白原纤维水分散体的表面特性

Colloids and Interfaces Pub Date : 2023-09-14 DOI: 10.3390/colloids7030059

Alexander Akentiev, Shi-Yow Lin, Giuseppe Loglio, Reinhard Miller, Boris Noskov

{"title":"Surface Properties of Aqueous Dispersions of Bovine Serum Albumin Fibrils","authors":"Alexander Akentiev, Shi-Yow Lin, Giuseppe Loglio, Reinhard Miller, Boris Noskov","doi":"10.3390/colloids7030059","DOIUrl":"https://doi.org/10.3390/colloids7030059","url":null,"abstract":"The surface properties of aqueous dispersions of worm-like fibril aggregates of bovine serum albumin (BSA) differ from those of the adsorption layers of the native protein. The dispersions of BSA fibrils are characterized by slower changes of the surface tension and dynamic surface elasticity and also have different steady-state values of the surface properties. The fourfold compression of the adsorption layer of BSA fibrils leads to noticeably higher surface pressures than those of a compressed layer of the native protein, indicating the formation of a more rigid layer structure in the former case. The spreading of BSA fibrils onto a liquid surface from a concentrated dispersion reduces the effect of surface-active admixtures on the layer properties. The dependencies of the dynamic surface elasticity on surface pressure almost coincide for the spread layers of fibrils and the native protein in the range of low surface pressures, but only the spreading of the native protein can lead to surface pressures higher than 4 mN/m. This distinction is presumably caused by the formation of stable clusters of BSA fibrils at the interface and their slow propagation along the liquid surface.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the ac Measurements of the Electrical Conductivity of Dilute Colloidal Electrolytes 稀胶体电解质电导率的交流测量

Colloids and Interfaces Pub Date : 2023-09-12 DOI: 10.3390/colloids7030058

Ioulia Chikina, Sawako Nakamae, Andrey Varlamov

引用次数: 0

Foam Stabilization by Surfactant/SiO2 Composite Nanofluids 表面活性剂/SiO2复合纳米流体的泡沫稳定研究

IF 2.4

Colloids and Interfaces Pub Date : 2023-09-07 DOI: 10.3390/colloids7030057

Fariza Amankeldi, M. Issakhov, Peyman Pourafshary, Z. Ospanova, M. Gabdullin, Reinhard Miller

引用次数: 0