Additive manufacturing, also known as 3D printing, is beginning to play an unprecedented role in developing many applications for industrial or personalized products. The conductive composite structures require additional treatment achieve electroactive surface useful electrochemical devices. In this paper, the surfaces of carbon black/poly(lactic acid) CB-PLA printouts were activated by electrolysis enzymatic digestion with proteinase K, a simultaneous combination both. proposed...

Acid-soluble collagen (ASC) from the fish skin of African catfish (Clarias gariepinus), Salmon (Salmo salar) and Baltic cod (Gadus morhua) was extracted characterized. The ASC extraction yield 75%, 73% 68%, respectively. denaturation melting temperatures (29.3°C 100.0°C) were significantly higher than (20.6°C 90.5°C; 15.2°C 86.7°C, respectively), assessed by differential scanning calorimetry. SDS-PAGE profile showed that each tested type I consisted two different α chains, α1 α2, as well a β...

This study introduces a method for producing printable, thermosensitive bioink formulated from agarose (AG) and carbon dioxide-saturated chitosan (CS) hydrogels. The research identified medium molecular weight as optimal production, with preferred hydrogel content of 40–60 %. Rheological analysis reveals the bioink's pseudoplastic behavior sol-gel phase transition between 27.0 31.5 °C. MMW chitosan-based showed also most stable extrusion characteristic. choice production was based on...

The last decades have witnessed a major advancement and development in three-dimensional (3D) printing technology. In the future, trend’s utilization of 3D is expected to play an important role biomedical field. This work presents co-extrusion polylactic acid (PLA), its derivatives (sPLA), chitosan with aim achieving filaments for objects, such as tools or implants. physicochemical antimicrobial properties were evaluated using SEM, FT-IR, DSC, instrumental mechanical test, based on ASTM...

This paper presents a comparison of the antimicrobial activity and cytotoxicity against L929 cells chitosan xerogels prepared by dissolving polymer in solution lactic acid (LA) or carbonic (CO2) then freeze-drying. There was no simple relationship between samples obtained using both techniques (LA CO2). Chitosan materials LA method 1:1 dilution were characterized highest (∼20%). For same diluted CO2 saturation method, viability approximately 2.5 times greater. Some tested innovative...

Abstract The aim of the present study was to compare different rape varieties. For this purpose oil from six varieties rapeseeds cold pressed under laboratory conditions. In obtained rapeseed oils fatty acids composition and minor components, characteristic values (acid value; AV TOTOX), oxidative stability (DSC test), volatiles were determined a sensory evaluation carried out. highest found for sample 5 (IP = 158 min), which also has lowest amount C18:3 (7.8%), chlorophylls (0.083 mg/kg),...

To provide antibacterial properties, the titanium samples were subjected to electrochemical oxidation in fluoride-containing diethylene glycol-based electrolyte create a oxide nanotubular surface. Afterward, surface was covered by sputtering with silver 5 nm film, and tops of nanotubes capped using laser treatment, resulting an appearance nanoparticles (AgNPs) around 30 diameter on such modified ensure controlled release bactericidal substance, additionally coated pH-sensitive...

Objective: The aim of our study was to examine the antimicrobial potential eight selected, commercially available wound dressings containing different agents: silver, chlorhexidine acetate, povidone-iodine, and manuka honey. Method: materials were tested against four reference strains bacteria: Staphylococcus aureus (PCM 2051), epidermidis 2118), Pseudomonas aeruginosa (ATCC 27853), Escherichia coli (K12), using disc diffusion-like method a time-killing assay. Results: For both experiments,...

Zinc compounds in polyolefin films regulate the transmission of UV-VIS radiation, affect mechanical properties and antimicrobial activity. According to hypothesis, use zinc- containing masterbatches polyethylene (PE) with different chemical nature-hydrophilic zinc oxide (ZO) hydrophobic stearate (ZS)-can cause a synergistic effect, especially due their properties. PE obtained on an industrial scale were evaluated for activity against E. coli S. aureus strains. The morphology samples (SEM),...

A new method of obtaining functional foam material has been proposed. The materials were created by mixing the poly lactic acid (PLA) solution in chloroform, chitosan (CS) dissolved water saturated with CO2 and polyethylene glycol (PEG), freeze-dried for removal solvents. composite foams characterized their structural (SEM, FT-IR, density, porosity), thermal (DSC), (hardness, elasticity, swelling capacity, solubility), biological (antimicrobial cytotoxic) properties. Chitosan composites was...

Abstract Bioprinting has a critical role in tissue engineering, allowing the creation of sophisticated cellular scaffolds with high resolution, shape fidelity, and cell viability. Achieving these parameters remains challenge, necessitating bioinks that are biocompatible, printable, biodegradable. This review highlights potential marine-derived polymers crosslinking techniques including mammalian collagen gelatin along their marine equivalents. While denaturation temperatures vary based on...

This study presents an innovative method for producing thermosensitive bio-ink from chitosan hydrogels saturated with carbon dioxide and agarose. It focuses on a detailed characterization of their physicochemical properties potential applications in biomedicine tissue engineering. The ORO test approved rapid regeneration the three-dimensional structure chitosan-agarose composites unidirectional bench press simulation test. diffusion dyes through hydrogel membranes strongly depended share...

One of the possibilities using high-pressure technique in inactivation microorganism is conducting this process at subzero temperature. However, for its practical application meat preservation appropriate properties should be maintained. Therefore, aim work was to examine effect pressure temperature (without freezing water) on proteins and texture mammal’s cold-adapted fish meat. The data showed that cod salmon were more susceptible pressure-induced denaturation/aggregation than beef pork...

To improve the in situ soil stabilization, different chemical additives are used (ion exchange compounds, based on H2SO4 or vinyl polymers, and organic using lignosulfonates). One interesting alternative is production of from various waste materials. The extensive testing waste-based blends with was performed; mechanical (unconfined compressive strength (UCS)) hydraulic (capillary rise, water absorption, frost resistance (FR)) properties were measured. optimization process led to obtaining...

The development of technology for preparing chitosan-protein scaffolds loaded with lysostaphin, which potentially could be used as dressing wound treatment and soft tissue infections caused by Staphylococcus aureus.The unique chitosan solubilization using gaseous CO(2) instead organic or inorganic acids was the incorporation enzyme that exhibits bactericidal activity against staphylococci, within structure sponges. developed lysostaphin revealed high antistaphylococcal activity, has been...

Nowadays, the encapsulation of sensitive products by various techniques has become popular as a promising preservation method. In particular, this applies to oils with high content unsaturated fatty acids and susceptibility deterioration. This work presents possibility using chitosan sodium alginate in form hydrogel membrane protect food ingredients such linseed oil, which is stored an aquatic environment. The obtained results showed efficiency coaxial method encapsulation, did not affect...

The article presents a new approach in the purification of chitosan (CS) hydrogel order to remove significant amount endotoxins without changing its molecular weight and viscosity. Two variants method used purify CS hydrogels from were investigated using PyroGene rFC Enzymatic Cascade assay kit. effect was assessed terms changes dynamic viscosity hydrogels, polymer, microbiological purity after refrigerated storage cytotoxicity against L929 cells based on ISO 10993-5:2009(E) standard....