Colloid Journal最新文献_第2页

Electroconvection near Two-Layer Composite Microparticles 双层复合微粒附近的电对流

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-11 DOI: 10.1134/S1061933X24600970

G. S. Ganchenko, V. S. Shelistov, E. A. Demekhin

引用次数: 0

Surface Modifiers for Reducing Bacterial Contamination in Medicine and Food Industry 减少医药和食品工业中细菌污染的表面改性剂

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-11 DOI: 10.1134/S1061933X24601082

Yu. V. Cherednichenko, I. R. Ishmukhametov, G. I. Fakhrullina

引用次数: 0

Rheology of Structured Liquids. Flow Regimes and Rheological Equations 结构液体流变学。流动状态和流变学方程

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-11 DOI: 10.1134/S1061933X24601227

V. N. Matveenko, E. A. Kirsanov

引用次数: 0

Spherical Polymer Gels Containing Sulfonate Groups: Synthesis and Adsorption Properties 含磺酸基球形聚合物凝胶的合成及其吸附性能

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-11 DOI: 10.1134/S1061933X24601045

S. G. Laishevkina, L. M. Druian, O. D. Iakobson, E. M. Ivan’kova, B. M. Shabsel’s, N. N. Shevchenko

引用次数: 0

Kinetics of the Interaction of Co–Cu Melts with Graphite and Microstructure of Formed Metal–Carbon Composites Co-Cu熔体与石墨相互作用动力学及形成的金属-碳复合材料微观结构

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-11 DOI: 10.1134/S1061933X24600520

O. A. Chikova, I. G. Shirinkina, V. S. Tsepelev, N. I. Sinitsin, V. V. Vyukhin

引用次数: 0

On the Calculation of Particle Electrokinetic Potential in Detonation Nanodiamond Dispersions 爆轰纳米金刚石分散体中粒子电动势的计算

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-09 DOI: 10.1134/S1061933X24601306

L. E. Ermakova, N. S. Chuikov, A. V. Volkova

{"title":"On the Calculation of Particle Electrokinetic Potential in Detonation Nanodiamond Dispersions","authors":"L. E. Ermakova, N. S. Chuikov, A. V. Volkova","doi":"10.1134/S1061933X24601306","DOIUrl":"10.1134/S1061933X24601306","url":null,"abstract":"The applicability of various approximations of the electrophoresis theory to calculating the electrokinetic potentials in real nanodisperse systems has been estimated by the example of aqueous polydispersed thermooxidized detonation nanodiamond sols containing nanoparticle aggregates as depending on the concentration and pH of background electrolyte (NaCl) solutions. It has been found that, at low potentials |ζW| < 25 mV calculated for primary particles within the framework of the Wiersema model, allowance for particle aggregation and aggregate porosity has almost no effect on the electrokinetic potential. In the range of |ζW| = 25−50 mV, the most reliable values of the electrokinetic potentials of the aggregates can, seemingly, be obtained using the Miller equation for ion-conducting particles taking into account their real porosities, provided that the potential is constant. At |ζW| > 50 mV, knowing the real sizes of the aggregates, the Overbeek equation with the Oshima analytical expressions for the f3(κr) and f4(κr) functions can be used to calculate the electrokinetic potentials under the assumption that the aggregates are monolithic.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 2","pages":"201 - 211"},"PeriodicalIF":1.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collective Excitations in Amorphous Ice 无定形冰中的集体激发

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-09 DOI: 10.1134/S1061933X24601410

R. M. Khusnutdinoff

引用次数: 0

Study of the Mechanism of Structure Formation in Aqueous Dispersions of Na+-Smectites Na+-蒙脱石水分散体结构形成机理的研究

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-09 DOI: 10.1134/S1061933X24601501

B. V. Pokidko, O. A. Dulina

{"title":"Study of the Mechanism of Structure Formation in Aqueous Dispersions of Na+-Smectites","authors":"B. V. Pokidko, O. A. Dulina","doi":"10.1134/S1061933X24601501","DOIUrl":"10.1134/S1061933X24601501","url":null,"abstract":"The paper presents the results of experimental studying colloidal structure and rheology of dilute aqueous Na+-montmorillonite dispersions by the capillary and rotational viscometry methods. Aqueous dispersions of clay particles undergo significant structural changes, which markedly affect the character of the flow of such systems. All these changes are managed by alterations in indifferent electrolyte concentration within a narrow concentration range. Certain critical concentration has been found to appear at a NaCl concentration of about 3 mM for the series of dispersions with solid contents of 0.25–3.0 wt %. This critical concentration is significantly lower than the coagulation thresholds reported in the experimental and theoretical works devoted to this scope. The substantial changes in the rheological behavior within this electrolyte concentration range may reflect both the processes of formation/disruption of aggregates and changes in the mechanism of either aggregation or structure formation. The obtained rheological data have been compared with theoretical calculations and the results of dispersion analysis (by the dynamic light scattering method) of aqueous dispersions. The data obtained widen the conceptions of the structuring processes in clay dispersions.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 2","pages":"212 - 228"},"PeriodicalIF":1.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slow Freezing and Thawing Dynamics of Human Ejaculate on Extremely Water-Repellent Carbon Soot Coatings–Implications to Sperm Cryopreservation 人类射精在极防水碳烟涂层上的缓慢冻结和解冻动力学——对精子冷冻保存的启示

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-09 DOI: 10.1134/S1061933X24601288

Karekin D. Esmeryan, Miglena M. Paneva, Petar P. Panev, Todor A. Chaushev

{"title":"Slow Freezing and Thawing Dynamics of Human Ejaculate on Extremely Water-Repellent Carbon Soot Coatings–Implications to Sperm Cryopreservation","authors":"Karekin D. Esmeryan, Miglena M. Paneva, Petar P. Panev, Todor A. Chaushev","doi":"10.1134/S1061933X24601288","DOIUrl":"10.1134/S1061933X24601288","url":null,"abstract":"Paradoxically, but the humans cannot survive at ultralow temperatures, while individual cells such as the spermatozoa can be stored at cryogenic conditions. This facilitates the in-vitro fertilization in cases of male infertility, but the success of assisted reproduction is not guaranteed due to cryodamage of part of the gametes. Recent innovations in carbon nanotechnologies provide perspectives to resolve the existing problems in reproductive medicine, since the flame deposition of rapeseed oil soot on the surfaces of freezing tools favors the cryopreservation of human semen. The water-repellent soot supports heat exchange rates allowing timely osmotic removal of the intracellular water and retained chemical equilibrium in the cells. It is unknown, however, whether the non-wettability of soot is responsible for the enhanced cryopreservation or the dynamics of sperm freezing and thawing influences the outcome. To understand this, 50 µL semen without and with 50 vol % cryoprotectant SpermFreezeTM are frozen within twenty minutes on two types of soot coatings by simultaneously cooling all components of the cryogenic chamber, leading to ice-liquid content in the droplets that eliminates the singular tip, followed by uniform melting via thermocapillary convection. The pre-cooling of soot-coated substrates and the absence of cryoprotectant generates an abrupt upward-moving freezing front and increases the total ice mass in the semen, creating a cone tip—processes, presumably worsening the cells’ viability. These novel results reveal that the fraction of ice crystals and their spatial distribution could be adjusted by selecting appropriate carbon nanostructures and cooling regimes, targeting future harmless sperm freezing.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 2","pages":"255 - 267"},"PeriodicalIF":1.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formulation and Evaluation of Nanoemulsion-Based Cream Using Green Ingredients Exhibiting Enhanced Performance Characteristics 使用绿色原料的纳米乳脂霜的配方及性能评价

IF 1.4 4区化学

Colloid Journal Pub Date : 2025-04-09 DOI: 10.1134/S1061933X24601239

Daphne Nguyen, Manish Kumar

{"title":"Formulation and Evaluation of Nanoemulsion-Based Cream Using Green Ingredients Exhibiting Enhanced Performance Characteristics","authors":"Daphne Nguyen,  Manish Kumar","doi":"10.1134/S1061933X24601239","DOIUrl":"10.1134/S1061933X24601239","url":null,"abstract":"The present study focuses on the formulation and evaluation of a nanoemulsion-based cream (nanocream) using green ingredients, aimed at enhancing performance, stability, and sustainability. The nanoemulsion was developed through the low-energy phase inversion temperature (PIT) method, which successfully protected green bioactive compounds like vitamin E, cinnamon oil, jojoba oil, and peppermint oil from degradation. A series of nanoemulsions were prepared using varying ratios of oils and surfactants and evaluated for stability, transparency, and droplet size. The optimized nanoemulsion, with a mean droplet size of 121.3 ± 1.1 nm and a low polydispersity index (PDI) of 0.094 ± 0.001, demonstrated high uniformity and stability. This optimized nanoemulsion was further used as the cream’s aqueous phase, forming a nanocream that exhibits enhanced permeation of nanoscale bioactives through a membrane and improved overall performance characteristics. In vitro membrane permeation studies revealed that the optimized nanocream achieved a permeation rate of 97.1%, substantially outperforming the control cream. In vitro antimicrobial studies showed comparable efficacy to standard market preparations containing synthetic agents. The nanocream also demonstrated long-term stability over six months, maintaining structural integrity without phase separation or significant changes in pH and spreadability. The nanoemulsion-based cream formulated with eco-friendly ingredients hence offers enhanced skin permeation, superior bioactive delivery, and stable performance, making it a promising candidate for topical skincare and antimicrobial applications.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 2","pages":"302 - 314"},"PeriodicalIF":1.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0