Systemin is an important mediator of wound-induced defense gene activation in tomato plants, and it elicits a rapid alkalinization of the growth medium of cultured Lycopersicon peruvianum cells. A possible mechanistic link between proton fluxes across the plasma membrane and the induction of defense genes was investigated by modulating plasma membrane H 1 -ATPase activity. Inhibitors of H 1 -AT...

Actomyosin contraction powers the sealing of epithelial sheets during embryogenesis and wound closure; however, the mechanisms are poorly understood. After laser ablation wounding of Madin-Darby canine kidney cell monolayers, we observed distinct steps in wound closure from time-lapse images of myosin distribution during resealing. Immediately upon wounding, actin and myosin II regulatory light...

In a recent issue of Cell, Chiaruttini et al. (2015) reveal the mechanical properties of the mysterious spiral filaments formed by the yeast ESCRT-III protein Snf7. The spirals are shown to be springs whose bending drives membrane deformation and perhaps membrane scission.

Untreated skin wound can inhibit the healing process. Chitosan and eel mucous have biodegradable, biocompatible, antimicrobial properties. This study aimed to determined potential of combination between chitosan membrane extract in re-epithelization collagen fibers deposition. Thirty adult male mice were divided into 5 groups, 6 animals/group. Skin wo und perform by punch biopsy 0.5 cm diameter...

The lateral membrane plays an important role in the mechanical stability of epithelial cell sheet in steady state. In addition, the lateral membrane is continuously remodeled during dynamic processes such as cell extrusion, cytokinesis, and intercellular cell movement. In wound healing, the lateral membrane must be built from flat and spread cells that had crawled into the area of the wound. Th...

The role of polyurethane adhesive transparent film dressing was studied in fifty patients against the conventional gauze dressing. "Polyurethane membrane" was found to be a superior form of dressing since it allowed frequent wound observation without disturbance of normal healing process due to change of dressings. It was also found to reduce the wound infection rate. It is moisture, vapour per...

In tissue engineering and wound healing, porous scaffolds can stimulate the wound healing process by regenerating the damaged or diseased tissue. But when applied in wound area various forces like bandage, contraction and self weight act upon these visco-elastic scaffold/membrane and cause deformation. As a result, the geometry and the designed porosity change which eventually alters the desire...

Our objective was to measure whey protein removal percentage from separated sweet using spiral-wound (SW) polymeric microfiltration (MF) membranes a 3-stage, 3× process at 50°C and compare the performance of with ceramic membranes. Pasteurized, Cheddar cheese (1,080 kg) microfiltered 0.3-?m polyvinylidene (PVDF) fluoride SW membrane 3×, 3-stage MF process. Cheese making processing were replicat...

AIM The aim of the present study is to investigate the origin and effect of virtual electrode polarization in uniform, decoupled and non-uniform cardiac tissue during field stimulation. METHODS A discrete bidomain model with active membrane behaviour was used to simulate normal cardiac tissue as well as cardiac tissue that is decoupled due to fibrosis and gap junction remodelling. Various uni...

Limited by the effective launch capacity of a rocket, deployable antenna is very important in design spaceborne array. Compared to traditional antenna, flexible coilable array has higher surface precision and better vibration control therefore more suitable for high frequency communication. In order minimize weight satellite reduce cost its launch, guideline geometry parameters crucial. Existin...