This work investigates the feasibility of producing low density particleboards using an adhesive system based on sour cassava starch, taking advantage of its adhesive and self-expansion properties. Relevant properties of the produced particleboards were evaluated according to European Standards including: density, internal bond, moisture content and thickness swelling. Low density particleboard...

the aim of this study was to explore the minimum amount of urea formaldehyde (uf) resin content and optimum particleboard density while maintaining boards’ quality to reduce production costs. board density at three levels (520, 620 and 720 kg m-3) and resin content (6, 7 and 8%) were variable parameters. stepwise multivariate linear regression models were used to evaluate the influence of board...

garlic and onions as dietary constituents and medicines have been used for many disorders which dates back to the early civilization. it has been shown that different species of allium have immunomodulating effects. in this study, we sought to determine if methanolic and chloroformic extracts of allim fistulosum l. (leek) have any effect on cell-mediated immune response in mice. methanolic and ...

in this research the utilization of acacia wood (acacia salicina) in medium density fiber board production was investigated. sample boards were made from acacia fibers at two resin contents (10, 12%), two press temperatures (175, 185 ˚c) and three press times(3, 4, 5 min). the results were analyzed based on a complete randomized design (crd) under a factorial experiment. results revealed that i...

PURPOSE To determine changes in topographical thickness of the epithelium and total cornea after hydrogel (2-hydroxyethyl methacrylate; HEMA or soft lens) and PMMA rigid contact lens wear with eyes closed, as measured by optical coherence tomography (OCT). METHODS Epithelial and total corneal thickness in 18 neophyte eyes was measured with OCT at intervals of 10 degrees across a 10-mm zone of...

the purpose of this reseach was to examine the influence of resin consumption gradient and press time on the physical and mechanical properties of particleboard produced from citrus tree residues. four resin consumption gradients; 0, 2, 4 and 6% difference between surface and core layers (10-10%, 11-9%, 12-8% and 13-7%) and two press times of 4 and 5 minutes were applied and totally 24 laborato...

Moisture content (MC), thickness swelling (TS), and bending properties of five commercial oriente 1 strandboards (OSBs) made of two wood species were measured. The measurements were made after specimens were conditioned to equilibrium at 35, 55, 75, 85, 95% relative humidity (RH) and 24°C'. It was shown that bending modulus of elasticity (MOE) and modulus of rupture (MOR) decreasej with increas...

This study was Characteristics of manufacture particleboard (PB) from sedar and wood slab of impregnated with UF. The chips were divided into coarse chips with dimensions of 2-4 mesh and fine chips of 30–60 mesh, urea formaldehyde (UF) resin solution at concentrations of 45 %, and 55% sprayed on these chips about 1 min until 10% to dry weight chips, they were dried under 5% moisture in a dram d...

The use of agriculture residues as filler in composites is increasing due to their strength, abundance and low cost. Soya stalks show promising renewable natural fiber. In polyethylene composites the physical and mechanical properties (flexural resistance, tensile, impacted absorbed energy, water uptake and thickness swelling) was examined at different composites. The results showed that, the m...

Rabbit cornea, either as a part of the whole eye or as an isolated specimen, was incubated in vitro in a moist chamber maintained at 34° C. The endothelial surface was perfused with various solutions in order to find a medium capable of maintaining in vitro cornea at normal thickness. The KEI medium (a culture medium for in vitro rabbit lens developed by Kinsey and associates) was found to be t...