Crude proteolytic enzyme from BCRC 910501 and its application in leather processing.

Enzymes are biological catalysts that exist in all living organisms. Proteases are one of the most important enzymes in the industry; microbial proteases are widely used in the food, textile, detergent, and leather industries. Traditionally, alkaline proteases are used in the leather industry for bating, however, due to environmental issues, there are many investigations for the application of proteolytic enzymes in other operations such as soaking, unhairing, and derma opening up.

Donkey Gelatin and Keratin Nanofibers Loaded with Antioxidant Agents for Wound Healing Dressings.

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 and plant-based materials, which possess bioactive properties, is an innovative topic in wound management. This study investigates the potential of donkey gelatin and keratin for blending with natural bioactive extracts such as sumac, curcumin, and oak acorn to fabricate antioxidant and antimicrobial nanofibers with accelerated wound healing processes.

Wet Blue Enzymatic Treatment and Its Effect on Leather Properties and Post-Tanning Processes.

Due to their variety, specific activity, and mild reaction conditions, enzymes have a wide application in beam house processes such as soaking, dehairing, bating, and de-greasing. Recently, due to improvements in biotechnology, re-bating after chroming has received increased attention. The aim of this work was to investigate the application of enzyme preparation in the re-bating process and its effect on the semifinished and finished product, as well as its influence on post-tanning operations.

Enzymes for Leather Processing: Effect on Pickling and Chroming.

Recently, increasing attention has been paid to the application of enzymes in a wide variety of leather production processes. The aim of the present study was to investigate the action of enzymatic pickling on derma's collagen and the influence of this action on subsequent processes and properties of chromed and finished leather. The application of active in acidic medium proteolytic enzymes in the pickling process led to an additional impact on derma structure: collagen was more strongly affected and the porosity of the pelt dermis was reduced, but the hide became more thermally stable.

An application of advanced hair-save processes in leather industry as the reason of formation of keratinous waste: few peculiarities of its utilisation.

The application of more environmentally friendly hide and skin unhairing technologies in leather processing results in a significant increase in keratin waste. There are currently two most promising hair-saving unhairing methods: enzymatic and hair immunisation. The complete use of hair-saving unhairing methods in the leather industry will lead to the formation of approximately 143 thousand tons of hair/wool waste annually, which will require disposal.

Short term preservation of hide using vacuum: influence on properties of hide and of processed leather.

The objective of this work was to investigate vacuum influence on hide preservation time and how it affects hide structure. It was established that vacuum prolongs the storage time without hide tissue putrefaction up to 21 days when the storage temperature is 4°C. The microorganisms act for all storage times, but the action is weak and has no observable influence on the quality of hide during the time period mentioned.