This paper analyses slip transfer at the boundary of nanoscaled growth twins in face-centred cubic (f.c.c.) metals for strengthening mechanism. The required stress for slip transfer, i.e. inter-twin flow stress, is obtained in a simple expression in terms of stacking fault energy and/or twin boundary (TB) energy, constriction energy and activation volume. For nanotwinned Al, Cu and Ni, inter-tw...

A novel acylation approach suited to rapid bulk thermoplasticization of lignocellulose without solvents was previously demonstrated by the authors in benchtop batch studies. The method relies upon a benzethonium chloride/sulfuric acid functionalizing agent at low concentrations act as wetting for wood pulp, similar an ionic liquid, yet binds ester flow aid final thermoplastic. present investiga...

The effects of CO2 injection and barrel temperatures on the physiochemical and antioxidant properties of extruded cereals (sorghum, barley, oats, and millet) were studied. Extrusion was carried out using a twin-screw extruder at different barrel temperatures (80, 110, and 140°C), CO2 injection (0 and 500 mL/min), screw speed of 200 rpm, and moisture content of 25%. Extrusion significantly incre...

The effects of glycerol and moisture contents on the thermal transitions of whey protein isolate (WPI) powder-glycerol-water mixtures were studied. Mixtures with ratios of 100:0, 70:30, 60:40, and 50:50 WPI:glycerol on a dry basis (db) were preconditioned to 0.34 +/- 0.01 (25.4 +/- 0.4 degrees C) and 0.48 +/- 0.02 (25.9 +/- 2.2 degrees C) water activity. Differential scanning calorimetry (DSC) ...

Acrylonitrile–butadiene–styrene (ABS) is one of the most extensively used engineering polymers. It necessary to study recycling ABS because environmental, economic and energy reasons. In this study, an resin was processed using a torque rheometer at different temperatures for numbers cycles. Pyrolysis gas chromatography mass spectrometry (Py-GC/MS) effects processing parameters on additives. Fo...

PURPOSE To report results of twin hook fixation for proximal femoral fractures in comparison to those fixed with the conventional lag screw. METHODS Between August 2005 and July 2006, 2 men and 15 women aged 74 to 94 (mean, 85) years with proximal femoral fractures underwent open reduction and internal fixation using the twin hook system. The tip-apex distance was compared with that in 20 pat...

High impact polystyrene (HIPS)/corn starch blends were prepared in presence of glycerol as a plasticizer via melt extrusion process by a twin-screw extruder. The novelty of this work is first, because of the use of pre-gelatinized corn starch as modified one and second, the procedure of making blends by extruder which makes it ease of access and also industrially possible. The blends were then ...

Because of their mechanical properties and low density, flax fibers seem to be competitive with glass fibers. However, these present a non-uniformity in many characteristics (non-constant diameter along the fiber, variable length, presence defects…). This leads dispersion properties. study focuses on development fully biodegradable green composites based poly (lactic acid) (PLA) (butylene succi...

Effects of extrusion processing parameters co-rotating twin-screw extruder – screw speed (SS = 500, 650, 800 rpm), feed rate (FR 22, 26, 30 kg/h), and moisture content the material (MC 20, 25, g/100 g), on reduction deoxynivalenol (DON), 3- 15- acetyldeoxynivalenol (3- 15-AcDON), HT-2 toxin (HT-2), tentoxin (TEN) alternariol monomethyl ether (AME), in whole grain triticale flour were investigat...

In most formulations processed via continuous twin screw granulation microcrystalline cellulose (MCC) and/or lactose are used as excipients, but mannitol is also a preferred excipient for wet granulation and tableting due to its non-hygroscopicity and inertness. Therefore, the aim of the current study was to investigate the influence of process parameters on critical quality attributes of granu...