Poultry feathers make up for as much 8.5% of chicken weight and represent a considerable amount almost pure keratin waste which is not being adequately utilized at the present time. The study dealt with processing poultry through two-stage alkaline-enzymatic hydrolysis. In first stage, were mixed 0.1 or 0.3% KOH water solution in 1 : 50 ratio incubated 70°C 24 h. After adjusting pH to 9, effects examined second stage on degraded those proteolytic enzyme additions (1-5%), time (4-8 h)...

Biomaterials (films, foils, fibers, coatings) based on proteins are becoming increasingly important due to the growing applications for which pork and beef gelatins used. Alternative types of (poultry or fish), have not yet been sufficiently tested, represent a high potential. This study looks at effect different UV exposure times chicken gelatin films with added glycerol. The was prepared using unique enzymatic hydrolysis process. quality UV-exposed compared exposed light. Radiation-induced...

The circular economy of animal by-products rich in collagen focuses on converting into peptides with a defined molecular weight. Collagen hydrolysates prepared by biotechnological methods from chicken gizzards, deer tendons, and Cyprinus carpio skeletons can be an alternative source for cosmetic products that traditionally use bovine or porcine hydrolysates. were characterized antioxidant activity, surface tension, solution contact angle, other parameters (dry weight, ash content, clarity)....

Summary Background Although keratin hydrolysates have become established as standard components in hair and nail cosmetics, studies on the moisturizing effects of do not appear among contemporary literature. Objectives To test if adding hydrolysate into an ointment base increases hydration skin improves barrier function, or diminishes trans‐epidermal water loss. Methods Formulations were prepared containing 2%, 4%, 6% (based weight base). The properties tested by measuring hydration, loss pH...

ABSTRACT The study is focused on windshield recycling process resulting in poly(vinyl butyral) (PVB) sheets with very low amout of remain glass particles. PVB were obtained from worldwide manufacturer DuPont and then they laminated by standard autoclaving process. One sample sheet was modified multi‐functional organic acid order to compare various levels adhesion. Three‐stage technology proposed for sheets. In the first‐stage safety mechanically cracked. second‐stage adhesion reduction...

Every year, the poultry industry produces a large number of by-products such as chicken heads containing considerable proportion proteins, particularly collagen. To prepare gelatin is one possibilities to advantageously utilize these raw materials. The aim paper was process into gelatins. An innovative method for conditioning starting material using proteolytic enzyme. Three technological factors influencing yield and properties extracted gelatins were monitored including amount enzyme used...

Antimicrobial hand gels have become extremely popular in recent years due to the COVID-19 pandemic. Frequent use of sanitising gel can lead dryness and irritation skin. This work focuses on preparation antimicrobial acrylic acid (Carbomer)-based enhanced by non-traditional compounds-mandelic essential oils-as a substitute for irritating ethanol. Physicochemical properties (pH viscosity), stability sensory attributes prepared were investigated. activity against representative Gram-positive...

Objectives: To estimate the efficacy and metabolic effects of growth hormone substitution as intravenous pulses together with alanyl-glutamine supplementation tight blood glucose control in prolonged critical illness. Design: Prospective double-blind, randomized trial open-label arm. Setting: Intensive care unit tertiary level hospital. Patients: Thirty multiple trauma patients (median Injury Severity Score 34). Interventions: Patients were randomized, at day 4 after trauma, to receive (0.3...

Short tendons of slaughtered cattle, which consist relatively pure collagen, were cleaned lipoid substances and non-collagen proteins using a commercial enzymatic preparation. Diluted acetic acid was used to separate the acid-soluble collagen (M N ~ 300 kDa) for yield around 5%. The residue extracted with water extraction conditions derived produce gelatine gel rigidity 350—410° Bloom 55—60%. Prolonged time, as well increased temperature, led deterioration in quality and, therefore, after...

In the European Union (EU), about five tons of poultry by-product tissues are produced every year. Due to their high collagen content, they represent a significant raw material source for gelatine production. The aim paper was biotechnological preparation from chicken feet. influence selected process factors on yield, gel strength, viscosity, and ash observed; two-level factor design experiments with three variable (enzyme addition, enzyme treatment time, extraction time) applied. After...

Honey, honey extracts, and bee products belong to traditionally used bioactive molecules in many areas. The aim of the study was primarily evaluate effect cosmetic matrices containing on skin. is complemented by a questionnaire survey knowledge awareness effects potential uses products. at various concentrations observed applying 12 formulations skin volar side forearm non-invasive bioengineering methods set 24 volunteers for 48 h. Very good moisturizing properties have been found with...

Chicken collagen is a promising raw material source for the production gelatins and hydrolysates. These can be prepared biotechnologically using proteolytic enzymes. By choosing appropriate process conditions, such changes achieved at molecular level of collagen, making it possible to prepare with targeted properties advanced cosmetic, pharmaceutical, medical, or food applications. The present research aims investigate model samples chicken gelatins, focusing on: (i) antioxidant activity...

Gelatin fibers have a specific surface and high porosity, which is why their use in medicine the food industry being researched. This article explores potential of centrifugal spinning to produce gelatin fibers. for fiber preparation obtained from non-traditional source collagen (chicken by-products) using unique enzymatic process. The quality compared with those prepared traditional tissues (porcine, bovine). results show that crosslinked glutaraldehyde vapor preserve structure even contact...

Abstract A series of ethylene–octene copolymer (EOC) composites have been prepared by melt‐mixing with different weight ratios expandable graphite filler (0–50% weight). Electrical conductivity [both alternating current (AC) and direct (DC)] thermal studies were carried out. Effect loading frequency on electrical was studied. DC has increased from 1.51 × 10 −13 S cm −1 to 1.17 . Percolation threshold also AC methods observed at about 16 vol% the filler. Real part permittivity found be...

Abstract Various ethylene–octene copolymers were crosslinked by dicumyl peroxide. Octene content was 16, 20, 30, 35 and 38 wt% melt flow index 1 or 3 g/10 min. The concentration of peroxide 0.3, 0.5 0.7 wt%. Crosslinking analyzed a rubber process analyzer in the temperature range 150–200 °C. Cross‐linkability evaluated from real part modulus s ' max versus level plots as slope line. With decreasing octene increasing crosslinkability increased. This confirmed also tan δ analysis. network...