in this study the consumption behavior of iranian urban households is analyzed for the eight main food commodities groups including cereal and its products, meat, milk and its products and eggs, fruits and vegetables, edible oils and butter, beverages, grains and nuts over 1974-2007. in this context, the flexible demand models such as quadratic expenditure, rotterdam, almost ideal demand system...

introdouction: one of the existing problems in the field of dentistry is the use of utilizing materials. utilizing materials in dentistry must have high rigidity and resistance and a beautiful appearance. the weak formulation of dentistry materials causes irritation, side effects, and increases the cost of healthcare. therefore, farms and organizations related to dentistry care are trying to pr...

Despite rising prices for natural resources during the past 30 years, global consumption of natural resources is still growing. This leads to ecological, economical and social problems. So far, however, limited effort has been made to decrease the natural resource use of goods and services. While resource efficiency is already on the political agenda (EU and national resource strategies), there...

A random mutagenesis of the arabinofuranosyl hydrolase Araf51 has been run in order to have access to efficient biocatalysts for the synthesis of alkyl arabinofuranosides. The mutants were selected on their ability to catalyze the transglycosylation reaction of p-nitrophenyl α-L-arabinofuranoside (pNP-Araf) used as a donor and various aliphatic alcohols as acceptors. This screening strategy und...

Fluorescent materials emit light of higher wavelength, in case illumination with exhibiting lower wavelength. In many commercial applications, fluorescent transfer non-visible ultraviolet (UV) into visible light. By this an additional color effect and visibility is reached. One typical field for application fluorescence dyes the textile area. Here, products are manifold used offered, e.g. brigh...

One factor that has highlighted the role of agriculture in the economy is to make the marketing system of agricultural products more efficient. The main purpose of this study was to identify the requirements of marketing the organic pomegranate of Paveh, Kermanshah Province, Iran, from the perspective of farmers. In order to identify contributing factors, an exploratory factor analysis was used...

conclusions we have developed a new, simple, and efficient method for one-pot aminoalkylation of active phenol compounds with various imines prepared from 2-aminopyrimidine and benzaldehydes in good to high yields (40%-97%). materials and methods all starting materials were purchased from merck and aldrich companies. the ir spectra were recorded on a perkin-elmer rxi infrared spectrometer. resu...