In this study the effect of TiO 2-SiO 2 nanocomposite on various performance characteristics of finished leather was investigated. For this purpose, TiO 2-SiO 2 nanocomposite was prepared via the sol-gel method from tetraethoxysilane (TEOS) and titanium n-butoxide (TBO) catalyzed with acid at ambient temperature. The prepared composite was applied by spraying on to the top coat of finished leathers. Scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) were employed to characterize the surface properties and the chemical structure of the nanocomposite films. Inductively coupled plasma optic emission spectrometer (ICP-OES) was used to evaluate elemental analysis of the nanocomposite on leather. The physical-mechanical and fastness properties of leathers treated with the nanocomposite were evaluated according to appropriate standards. The results indicated that the use of TiO 2-SiO 2 nanocomposite improved certain performance characteristics of leather such as dry and wet rubbing fastness, color fastness to UV light and finish adhesion.
The present investigation was undertaken to evaluate the antimicrobial and antioxidant activities of the wild edible mushroom Agaricus lanipes, and also to investigate its cytotoxicity and potential and possible apoptotic effect against the A549 lung cancer cell line in in vitro conditions. Total antioxidant capacity, total phenolic content, total oxidant status, total antioxidant status, lipid hydroperoxides, and total free -SH levels of A. lanipes were found to be 4.55 mg T/g, 14.6 mg GA equivalent/g, 3.10 mg HO equivalent/g, 2.25 mg HO equivalent/g, and 1.90 µmol/g, respectively. The methanolic extract of A. lanipes had relatively strong antimicrobial activity against seven tested microorganism strains. It also had high anti-proliferative potency and strong pro-apoptotic effects, and this mushroom used as a daily nutrient could be a source for new drug developments and treatment in cancer therapies, and could be a guide for studies in this area.
FABRICATION OF COLLAGEN HYDROLYSATE NANOFIBERS BY THE ELECTROSPINNING METHOD ABSTRACT. Nanotechnology is a groundbreaking technology which has found applications on many areas of daily life. Fibers with nanometer diameters are the most suitable candidates for a large number of applications since they have high surface area to volume ratio and different surface characteristics. Among the various nanofiber production techniques, the most advanced and efficient is the electrospinning technique. In our study, nanofibers were obtained from collagen hydrolysate by the electrospinning method. For this purpose, collagen hydrolysate was dissolved at different concentrations in 2,2,2-trifluorethanol and stirred for six hours at room temperature. The turbidity, viscosity, conductivity and pH of the solutions were determined. According to the results obtained, it was observed that viscosity and conductivity values rose as the amount of collagen hydrolysate increased. Nanofibers of collagen hydrolysate with 103 nm and 384 nm obtained by the electrospinning method were examined by SEM, and their morphological characteristics were discussed. KEY WORDS: electrospinning, collagen hydrolysate, nanofiber, leather FABRICAREA NANOFIBRELOR DIN HIDROLIZAT DE COLAGEN PRIN METODA ELECTROSPINNING REZUMAT. Nanotehnologia este o tehnologie de ultimă oră, care a găsit aplicaţii în multe domenii ale vieţii de zi cu zi. Fibrele cu diametru de ordin nanometric sunt cele mai potrivite candidate pentru un număr mare de aplicaţii, deoarece au raport suprafaţă/volum ridicat şi caracteristici diferite ale suprafeţei. Printre diferitele tehnici de producţie a nanofibrelor, cea mai avansată şi eficientă este tehnica electrospinning. În studiul nostru, s-au obţinut nanofibre din hidrolizat de colagen prin metoda electrospinning. În acest scop, hidrolizatul de colagen a fost dizolvat la diferite concentraţii în 2,2,2-trifluoretanol şi agitat timp de şase ore la temperatura camerei. S-au determinat turbiditatea, vâscozitatea, conductivitatea şi pH-ul soluţiilor. Conform rezultatelor obţinute, s-a observat că valorile vâscozităţii şi conductivităţii au crescut odată cu creşterea cantităţii de hidrolizat de colagen. Nanofibrele din hidrolizat de colagen cu 103 nm şi 384 nm obţinute prin metoda electrospinning au fost examinate prin SEM şi s-au discutat caracteristicile morfologice ale acestora. CUVINTE CHEIE: electrospinning, hidrolizat de colagen, nanofibră, piele LA FABRICATION DE NANOFIBRES D'HYDROLYSAT DE COLLAGÈNE PAR LE PROCÉDÉ D'ÉLECTROFILAGE RÉSUMÉ. La nanotechnologie est une technologie révolutionnaire qui a trouvé des applications dans de nombreux domaines de la vie quotidienne. Les fibres de diamètre nanométrique sont les candidats les plus appropriés pour un grand nombre d'applications car elles ont un rapport surface/volume élevé et des caractéristiques de surface différentes. Parmi les différentes techniques de production de nanofibres, la plus avancée et la plus efficace est la technique d'électrofilage. Dans notre étude, les nanofibres ont ...
In this study, fig leaves, zeolite and alginate were used to prepare a biocomposite for the adsorption of Pb(II) ions. Effects of pH, temperature, initial lead concentration and contact time on the adsorption process have been investigated. The amount of adsorbed lead per gram of sorbent was found to be approximately 150.3 mg/g. The prepared biocomposite possesses promising adsorption potential. Maximum uptake of Pb(II) ions (85%) has been achieved at pH 6, with 25 mg/L of initial concentration and at a temperature of 288.15 K. The data correlated well with Freundlich and D-R models. The adsorption was physical in nature.
A field of biotechnology called "biofabrication" focuses on the study and development ofbiologically engineered processes for the creation of functional products. Scientists from a variety ofbackgrounds are entering the subject of biofabrication as it develops and grows. One of the most widelyused fabrics in the world, leather, is currently created using this technology. Leather is a strong, flexible,and long-lasting material, obtained from the tanning, or chemical treatment of animal skins and hides.Clothing, shoes, handbags, furniture, tools, and sporting goods can all be made from leather, and it isdurable for many years. The main protein of leather, collagen can be grown artificially by using the processof biofabrication, which involves DNA modification. Additionally, it makes precise use of 3D printingtechnology to combine materials and cells to cultivate tissues. After introducing Lab-grown burgers, it isnowadays no surprise to bio-fabricate leather which is an environmentally friendly, efficient, and novelway of production. With the help of this technique, the leather may be produced with arranged elasticity,flexibility, and thickness. This study presents information about the biofabrication of lab-grown animalproducts.
In this study, fig leaves, zeolite and alginate were used to prepare a biocomposite for the adsorption of Pb(II) ions from aqueous solutions. Effects of various parameters on the biosorption process such as pH, temperature, initial lead concentration and contact time have been investigated. Maximum uptake of Pb(II) ions (85%) has been achieved at pH 6, with 25 mg/L of initial concentration and at a temperature of 288.15 K. Among the applied models, the data correlated well with Freundlich and D-R models and it was established that the biosorption was physical in nature. The amount of adsorbed lead per gram of sorbent was found to be 150.3 mg/g. Thermodynamic parameters showed the exothermic heat of biosorption and the feasibility of the process. Results have suggested that the prepared biosorbent possesses promising biosorption potential.
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