A5034307523- Collagen: Extraction and Characterization
- Dyeing and Modifying Textile Fibers
- Enzyme Production and Characterization
- Cultural Heritage Materials Analysis
- Silk-based biomaterials and applications
- Enzyme-mediated dye degradation
- Essential Oils and Antimicrobial Activity
- Protein Hydrolysis and Bioactive Peptides
- Engineering Technology and Methodologies
- Dental materials and restorations
- Microplastics and Plastic Pollution
- Minerals Flotation and Separation Techniques
- Nanocomposite Films for Food Packaging
- biodegradable polymer synthesis and properties
- Meat and Animal Product Quality
- Additive Manufacturing and 3D Printing Technologies
- Advanced Sensor Technologies Research
- Advanced Drug Delivery Systems
- Plant-Derived Bioactive Compounds
- Fermentation and Sensory Analysis
- Calcium Carbonate Crystallization and Inhibition
- Phytochemicals and Antioxidant Activities
- Graphene and Nanomaterials Applications
- Phosphorus and nutrient management
- Dye analysis and toxicity
Kaunas University of Technology
2014-2024
Leather dyeing is a difficult task due to its heterogeneity and complexity. Several studies are aimed at improving the effectiveness of dyeing, including process optimization, use dye auxiliaries, ultrasound, liposomes, enzymes. Enzymes receiving more attention their selectivity high activity under optimum conditions. They already applied in pretanning; however, information about enzyme application very limited. The study investigating using preparation together with or pretreating leather...
Due to their variety, specific activity, and mild reaction conditions, enzymes have a wide application in beam house processes such as soaking, dehairing, bating, de-greasing. Recently, due improvements biotechnology, re-bating after chroming has received increased attention. The aim of this work was investigate the enzyme preparation process its effect on semifinished finished product, well influence post-tanning operations. enzymatic treatment chromed leather (wet blue) led higher...
The aim of this study was to investigate the possibility using essential oils Thymus vulgaris as an alternative preservative for chromed leather.The differences between chemical composition commercial and pure thyme were determined.It observed that these have influence on antibacterial activity oils.Gram-positive bacteria found be more sensitive than Gram-negative bacteria.The Pseudomonas aeruginosa had a low sensitivity action selected thyme, but leather samples treated with remained...
The objective of this work was to investigate vacuum influence on hide preservation time and how it affects structure. It established that prolongs the storage without tissue putrefaction up 21 days when temperature is 4°C. microorganisms act for all times, but action weak has no observable quality during period mentioned. shrinkage decrease negligible, which shows breaking intermolecular bonds does not occur. Optical microscopy, infrared spectroscopy differential scanning calorimetry also...
Recently, increasing attention has been paid to the application of enzymes in a wide variety leather production processes. The aim present study was investigate action enzymatic pickling on derma’s collagen and influence this subsequent processes properties chromed finished leather. active acidic medium proteolytic process led an additional impact derma structure: more strongly affected porosity pelt dermis reduced, but hide became thermally stable. enzymatically pickled bonded chromium...
Acute and chronic wounds present a significant healthcare challenge, requiring innovative solutions for effective treatment. The exploitation of natural by-products with advanced cell regeneration potential plant-based materials, which possess bioactive properties, is an topic in wound management. This study investigates the donkey gelatin keratin blending extracts such as sumac, curcumin, oak acorn to fabricate antioxidant antimicrobial nanofibers accelerated healing processes. fabricated...
Usually, beamhouse processes are carried out by varying a medium from strongly alkaline (unhairing-liming) up to acid (pickling). This study is designed develop preparation of hide for tanning via that avoid sharp change pH. Enzymes active in employed unhairing buffer system containing 2.5% acetic and 0.3% sodium acetate. An oxidative treatment with peracetic then allows the complete removal residual hair scud. During both processes, treatment, opening derma structure occurs: 13.3-14.6g...
The leather industry generates a significant amount of various wastes, and their utilisation is serious task for researchers.Ways to reuse or decontaminate such waste are being developed intensively.Unfortunately, the finished leather, which eventually becomes waste, almost unexplored.The present research designed evaluate potential hydrolysis obtain protein hydrolysates suitable in processing establish factors that influence quality during an application.Enzyme preparation Vilzim PRO Conc...
The bating of pelts after using peracetic aci d for deliming was studied. It established that the commonly used enzymes, which are active in alkaline media, acted weakly such pelts: they did not remove scud and hair remnants from grain pelt satisfactorily. Enzyme preparations LITHUDAC L Novo Bate WB, acid can be pelts. These enzymes clean well do affect collagen markedly.
Attempts were made to produce emulsions suitable for leather fatliquoring by using technical materials and essential oils. An investigation has shown that oils of Eucalyptus globulus or Lavandulae officinalis can be mixed with fatliquor resulting in stable emulsions, which disintegrated adding electrolytes. The stability depends on the sort oil product. use did not disimprove properties finished leather.
The research was aimed to investigate the influence of deliming with peracetic acid on leather dyeing kinetics. Hydrophobic C.I. Acid Red 213 and hydrophilic 423 dyes were used. Sorption dye depends hydrophobicity/hydrophility temperature. Equilibrium process is reached faster using hydrophobic at 45 ºC. However, both control experimental fibres adsorb more this fact does not depend diffusion coefficient calculated according Weisz model higher when conventional leather. change method has...
Pelt obtained by deliming with peracetic acid can be chromed after additional treatment sodium chloride or oxalic solution, directly tanned using synthetic tannins. The results of differential scanning calorimetry and thermogravimetric analyses have suggested that any tanning increases thermal stability leather collagen. produced chrome-free leather, despite its high tensile strength, is not characterized shrinkage temperature what indicates insufficient such leather. This fact contradicts...