Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one most important constituents in chemical industry. The paper emphasizes different synthesis routes hybrid materials consisting dodecatungstophosphoric acid silver salt (AgPW) ? zeolite—stepwise wet impregnation, silver-exchange zeolite, dry mixing precursors. Composite preparation procedures induced mi...

meet the growing demand for transportation fuels. The main hurdles to be overcome include feedstock-supply logistics, conversion technology and workforce availability. agronomists, agricultural engineers, and implement-manufacturing companies are addressing feedstock production, harvest, storage and transportation. Several universities, especially those in the Midwest, are developing new curric...

A model was previously developed (Biofuel Energy Systems Simulator; www. bess.unl.edu) to predict greenhouse gas (GHG) emissions and net energy yield when ethanol is produced from corn. The model also predicts feedlot cattle, dairy cattle, and swine performance and feed replacement value of ethanol coproducts. Updated equations that predict performance of feedlot cattle fed 0 to 40% of dietary ...

OBJECTIVE Ethanol wet-bonding (EWB) technique has been stated to decrease degradation of resin-dentin bond. This study evaluated the effect of two EWB techniques on composite resin-to-enamel bond strength. MATERIALS AND METHODS Silicon carbide papers were used to produce flat enamel surfaces on the buccal faces of forty-five molars. OptiBond FL (OFL) adhesive was applied on enamel surfaces in...

The aim of the present study was to compare bioethanol production from wet exploded corn stover (WECS) and loblolly pine (WELP) hydrolyzed with in-house and commercial enzymes and fermented separately (SHF) and simultaneously (SSF). In-house enzymes produced from Trichoderma reesei, RUT-C30 and a novel fungal strain, Aspergillus saccharolyticus were loaded as 5 and 15 FPU/g glucan and supplemen...

OBJECTIVE To evaluate the effect of chlorhexidine and ethanol on microleakage of composite resin restoration to dentine. METHODS Class II cavities with dentinal margin were prepared on 96 premolar teeth. All specimens were acid-etched, rinsed and dried. Then the samples were randomly divided into four groups according to pre-treatment of the dentine: no treatment (control group); treatment wi...

1. Crucian carp (Carassius carassius L.) and Common carp (Cyprinus carpio L.) were subjected to 2h progressive hypoxia followed by up to 6 h anoxia in closed respirometers at 15 °C. 2. The concentrations of glycogen, glucose, phosphoryl creatine, alanine, succinate, lactate, ethanol and ammonia were determined in whole Crucian carp following exposure to both hypoxia and anoxia. 3. Ethanol and l...

The many recent dry-grind plants that convert corn to ethanol are potential sources of substantial amounts of corn oil. This report describes an aqueous enzymatic extraction method to separate oil from dry-fractionated corn germ. The method is an extension of a method previously developed for wet-mill germ. Oil dispersed in lipid bodies throughout the germ was converted to oil droplets suspende...

In waterjet and laser milling, material is removed from a solid surface in a succession of layers to create a new shape, in a depth-controlled manner. The inverse problem consists of defining the control parameters, in particular, the two-dimensional beam path, to arrive at a prescribed freeform surface. Waterjet milling (WJM) and pulsed laser ablation (PLA) are studied in this paper, since a g...