there has been a great increase in the consumption of various food additives in recent years. the purpose of this study was to identify the incidence of sensitization to food additives by using skin prick test in patients with allergy and to determine the concordance rate between positive skin tests and oral challenge in hypersensitivity to additives. this cross-sectional study included 125 (fe...

1-Pentene, respectively 1-hexene, were reacted with 13 homogeneous metallocene catalysts to give linear oligomerization products, predominantly dimers, with selectivities above 90%. The product distributions of the codimerization reactions of 1-pentene with 1-hexene reflected a binomial behaviour. Therefore, the ratio for dimers is 1:2:1 (C10:C11:C12) while the trimers (pentadecenes up to octad...

Implication of mineral additives into the asphalt concrete mixture can influence viscoelastic behavior; change density, gradation, and strength properties. In present investigation, fly ash silica fumes were added to mixture. Slab samples compacted with aid laboratory roller, then beam specimens sawed from slab samples. The subjected repeated flexural stresses through four-points bending test a...