Jaroslav Katona
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View article: Comparative Analyses of Different Routes to Prepare Cutin Colloidal- and Nano- Particle Dispersions from Tomato (Solanum lycopersicum) Peels
Comparative Analyses of Different Routes to Prepare Cutin Colloidal- and Nano- Particle Dispersions from Tomato (Solanum lycopersicum) Peels Open
Cutin is a natural plant polyester, a constituent of the cuticle that covers aerial plant surfaces. Following the trends of agricultural and food waste reduction and the growing demand for plant-derived nanomaterials, cutin was extracted f…
View article: Colorimetric Food Freshness Indicators for Intelligent Packaging: Progress, Shortcomings, and Promising Solutions
Colorimetric Food Freshness Indicators for Intelligent Packaging: Progress, Shortcomings, and Promising Solutions Open
The colorimetric food freshness indicator (CFFI) is a promising technology in intelligent food packaging, offering the capability for real-time monitoring of food freshness through colorimetric changes. This technology holds significant pr…
View article: The Road to Re-Use of Spice By-Products: Exploring Their Bioactive Compounds and Significance in Active Packaging
The Road to Re-Use of Spice By-Products: Exploring Their Bioactive Compounds and Significance in Active Packaging Open
Spice by-products, often discarded as waste, represent an untapped resource for sustainable packaging solutions due to their unique, multifunctional, and bioactive profiles. Unlike typical plant residues, these materials retain diverse phy…
View article: Chitosan/sodium dodecyl sulfate microcapsules preparation: Influence of applied method
Chitosan/sodium dodecyl sulfate microcapsules preparation: Influence of applied method Open
This study aims to compare and analyse the synthesis of microcapsules stabilized with chitosan/sodium dodecyl sulphate complex according to emulsion preparation methods. For this purpose, 20 % oil-in-water emulsions were obtained in two wa…
View article: A Review of Investigations and Applications of Biocides in Nanomaterials and Nanotechnologies
A Review of Investigations and Applications of Biocides in Nanomaterials and Nanotechnologies Open
In recent years, the development of nanomaterials with biocidal properties has received considerable attention due to their potential applications in various industries, including food, medicine, and cultural heritage preservation. The gro…
View article: Investigation of Silk Fibroin/Poly(Acrylic Acid) Interactions in Aqueous Solution
Investigation of Silk Fibroin/Poly(Acrylic Acid) Interactions in Aqueous Solution Open
Silk fibroin (SF) is a protein with many outstanding properties (superior biocompatibility, mechanical strength, etc.) and is often used in many advanced applications (epidermal sensors, tissue engineering, etc.). The properties of SF-base…
View article: Chitosan/Sodium Dodecyl Sulfate Complexes for Microencapsulation of Vitamin E and Its Release Profile—Understanding the Effect of Anionic Surfactant
Chitosan/Sodium Dodecyl Sulfate Complexes for Microencapsulation of Vitamin E and Its Release Profile—Understanding the Effect of Anionic Surfactant Open
Microencapsulation of bioactive substances is a common strategy for their protection and release rate control. The use of chitosan (Ch) is particularly promising due to its abundance, biocompatibility, and interaction with anionic surfacta…
View article: Adsorption of Equimolar Mixtures of Cationic and Anionic Surfactants at the Water/Hexane Interface
Adsorption of Equimolar Mixtures of Cationic and Anionic Surfactants at the Water/Hexane Interface Open
In mixed solutions of anionic and cationic surfactants, called catanionics, ion pairs are formed which behave like non-ionic surfactants with a much higher surface activity than the single components. In equimolar mixtures of NaCnSO4 and C…
View article: Preparation of composite zein/natural resin nanoparticles
Preparation of composite zein/natural resin nanoparticles Open
The aim of this work was to investigate a possibility of preparing composite zein/natural resin (shellac and rosin) nanoparticles by antisolvent co?precipitation from their aqueous ethanol solutions. Influence of zein/resin mass ratio (1/0…
View article: Preparation of biocompatible films from aqueous dispersions of zein nanoparticles
Preparation of biocompatible films from aqueous dispersions of zein nanoparticles Open
In this work, a stable aqueous zein dispersion i.e. zein pseudolatex (latex - colloidal dispersion of polymer particles in a liquid) was prepared by spontaneous antisolvent precipitation of 10% w/w zein solution in 90% v/v aqueous ethanol.…
View article: Rheological characterisation of chitosan/sodium lauryl ether sulfate complexes
Rheological characterisation of chitosan/sodium lauryl ether sulfate complexes Open
Chitosan is a cationic biopolymer, which attracts more and more attention in recent years, due to its exceptional physical and chemical properties, expressive biocompatibility and possibilities of obtaining from renewable sources. Formed p…
View article: Properties of double W/O/W emulsions containing vitamin C and E stabilized with gelatin/sodium caseinate complex
Properties of double W/O/W emulsions containing vitamin C and E stabilized with gelatin/sodium caseinate complex Open
Double emulsions are complex liquid dispersion systems in which the droplets of one dispersed liquid are further dispersed in another liquid, producing W/O/W or O/W/O emulsions. W/O/W emulsions are the most studied systems because they hav…
View article: Preparation of TiO2 and ZnO dispersions for inkjet printing of flexible sensing devices
Preparation of TiO2 and ZnO dispersions for inkjet printing of flexible sensing devices Open
Research presented in this article focuses on the preparation of functional dispersions for inkjet printing of nanoparticles as sensitive layers. The stable suspensions of MOx(M = Ti, Zn) were prepared using gum arabic (GA) and Solsperse? …
View article: An investigation on the influence of pH and ionic strength on the adsorption and interfacial dilatational properties at the oil-water interface of pumpkin (Cucurbita pepo) seed protein hydrolysate
An investigation on the influence of pH and ionic strength on the adsorption and interfacial dilatational properties at the oil-water interface of pumpkin (Cucurbita pepo) seed protein hydrolysate Open
Pumpkin (Cucurbita pepo) seed protein hydrolysate (PSPH) was obtained by enzymatic hydrolysis of pumpkin seed protein isolate using pepsin. Influence of pH (3, 5 and 8) and ionic strength, Ic (0?1 mol dm-3), on the adsorption kinetics of P…
View article: Flexible and highly sensitive humidity sensors using screen-printed TiO2 nanoparticles as sensitive layer
Flexible and highly sensitive humidity sensors using screen-printed TiO2 nanoparticles as sensitive layer Open
In this work, we present an original example of flexible and miniaturized humidity sensor using screen-printed TiO2 nanoparticles as sensitive layer. The proposed sensors operate under room-temperature conditions and exhibit high sensitivi…
View article: Surface Tension Measurements with the Drop Profile Analysis Tensiometry—Consideration of the Surfactant Mass Balance in a Single Drop
Surface Tension Measurements with the Drop Profile Analysis Tensiometry—Consideration of the Surfactant Mass Balance in a Single Drop Open
In drop profile analysis tensiometry, the ratio of drop surfaces area S to volume V is large, i.e., S/V >> 1. In such a case, the concentration of a surfactant within the drop bulk decreases due to adsorption at the drop surface. In contra…
View article: Fabrication and Characterization of Flexible and Miniaturized Humidity Sensors Using Screen-Printed TiO2 Nanoparticles as Sensitive Layer
Fabrication and Characterization of Flexible and Miniaturized Humidity Sensors Using Screen-Printed TiO2 Nanoparticles as Sensitive Layer Open
This paper describes the fabrication and the characterization of an original example of a miniaturized resistive-type humidity sensor, printed on flexible substrate in a large-scale manner. The fabrication process involves laser ablation f…
View article: Interfacial properties of chitosan/sodium dodecyl sulfate complexes
Interfacial properties of chitosan/sodium dodecyl sulfate complexes Open
Contemporary formulations of cosmetic and pharmaceutical emulsions may be achieved by using combined polymer/surfactant system, which can form complexes with different structure and physicochemical properties. Such complexation can lead to…
View article: Properties of water in oil emulsions (W/O) stabilized with mixtures of PGPR and polyglycerol fatty acid esters
Properties of water in oil emulsions (W/O) stabilized with mixtures of PGPR and polyglycerol fatty acid esters Open
Water in oil (W/O) emulsions are dispersed systems which have very wide application as a carriers in the food, pharmaceutical and cosmetic industry products. The main problem with practical application of such systems is their low stabilit…
View article: An investigation of chitosan and sodium dodecyl sulfate interactions in acetic media
An investigation of chitosan and sodium dodecyl sulfate interactions in acetic media Open
Polymer/surfactant association is a cooperative phenomenon where surfactant binds to the polymer in the form of aggregates, usually through electrostatic or hydrophobic forces. As already known, polyelectrolytes may interact with oppositel…
View article: Characteristics of W/O emulsions containing polymeric emulsifier PEG 30-dipolyhydroxystearate
Characteristics of W/O emulsions containing polymeric emulsifier PEG 30-dipolyhydroxystearate Open
Water-in-oil (W/O) emulsions are dispersed systems which are often used in the pharmaceutical, cosmetic and food industries as products, or as carriers of active substances. It is well known that they are very unstable, so that selection o…