1. It had been shown in previous papers that when a collodion membrane has been treated with a protein the membrane assumes a positive charge when the hydrogen ion concentration of the solution with which it is in contact exceeds a certain limit. It is pointed out in this paper that by treating the collodion membrane with a protein (e.g. oxyhemoglobin) a thin film of protein adheres to the memb...

Scanning force microscopy ~SFM! of topography, frictional force, and stiffness on thin gelatin films reveals an entire spectrum of tribological behavior. Images display two distinct phases of gelatin whose characteristics relate to the degree of crystallinity. Dissimilar regimes of velocityand load-dependent friction and wear on each phase indicate glassy, rubbery, or melt behavior. Of fundamen...

Nanofibers, produced through the novel method of electrospinning, have a high ratio surface area to volume, which allows them different optical, electrical, thermal, and mechanical properties than macroscale materials. In this study, it was aimed produce nanofibers with gelatin curcumin. The effects concentration crosslinking citric acid on characteristics electrospun were studied. Gelatin film...

Digestive health is critically dependent on the secretion of enzymes from the exocrine pancreas to the duodenum via the pancreatic duct. Specifically, pancreatic trypsin is a major protease responsible for breaking down proteins for absorption in the small intestine. Gelatin-based hydrogels, deposited in the form of thin films, have been studied as potential sensor substrates that hydrolyze in ...

BACKGROUND Sclerosing peritonitis (SP) and encapsulating peritoneal sclerosis (EPS) are serious complications of continuous ambulatory peritoneal dialysis. Although we have shown previously that matrix metalloproteinase-2 (MMP-2) is increased in peritoneal injury leading to SP/EPS, most of the MMP-2 in the dialysate drained from the peritoneal cavity was the latent form that was lacking activit...

Edible films were elaborated from gelatin solutions (4% w/v) of mahi-mahi skin (Coryphaena hippurus) with 2,5; 5; 7,5 and 10% v/v oregano extract (OE) its physicochemical, antimicrobial, structural surface properties determined. The control 2.5% OE showed the lowest moisture opacity values highest viscosity values. All inhibited growth Staphylococcus aureus Proteus vulgaris. Alone antimicrobial...

OBJECTIVE Platelet-rich plasma is blood plasma enriched with platelets and contains various growth factors. Two major issues remain to be resolved in the use of platelet-rich plasma: the short biological activity after application, and the need to prepare platelet-rich plasma at each application instance. To overcome these problems, we developed a drug delivery system using gelatin hydrogel and...

Investigations of photochemical reactions in higher plants and other biological systems frequently require the irradiation of large areas with welldefined regions in the visible and near-visible spectrum. Large glass filters or dyed gelatin filters of the Wratten type are costly. Inexpensive tlheatrical gelatin filters, dyed cellophane, or other dyed plastics are available, but these are limite...