Poly(ester-urethane) urea (PEUU) based on ethanolamine as a chain extender contain hydroxyl and amino groups was chemically synthesized using 1,1'-methylenebis(4-isocyanatobenzene) MDI diisocyanates, castor oil. One step polymerization procedure has been used to complete the PEUU formation this polymeric target irradiated with different doses (100, 250, 400, 600 kGy) of gamma rays. A full physi...

The mesoporous polyamide (PA) aerogel similar in chemical structure to DuPont's Kevlar is an advanced thermal insulation material tested airspace applications. Unfortunately, the monolithic readily absorbs humidity (from moist air), which dramatically alters its mechanical properties. compressive strength of PA first increases when water content increases, but subsequently decreases following a...

Oak wood barrel sanitization is crucial in terms of food safety, since barrels enrich the wine aromas and taste sensation provide physico-chemical stability. The most used method sulphuring; however, there a European prohibition (Directive 98/8/CE2) that does not allow use this method. For reason, aim present work was to study an alternative technology, atmospheric pressure cold plasma (APCP) s...

The constraints associated with peat use in horticulture has led to a search for alternative materials their as growing media. organic derived from palm trees (composted or not) can constitute an due ligneous and fibrous character, similar coir fiber. This work studies the feasibility of using several palm-tree-derived (Phoenix dactylifera L.) media ingredients transplant production lettuce (La...

BACKGROUND Protein evolution is particularly shaped by the conservation of the amino acids' physico-chemical properties and the structure of the genetic code. While conservation is the result of negative selection against proteins with reduced functionality, the codon sequences determine the stochastic aspect of amino acid exchanges. Thus far, it is known that the genetic code is the dominant f...

The analysis of the features physico-mechanical and physico-chemical properties undeformed twisted mechanical deformations shear, compression, bending, torsion, slice is carried out. Special attention paid to processing qualitative state materials, which should change when production requirements are met move a new stable in resulting products.

The study examined Yam Tuber Species (YTS), Tuber Steeping Duration (TSD) and Flour Particle Size (FPS) as factors of flour. Data were collected using white yam, water yam and yellow yam steeped in water (30 ± 2 °C, pH 6.78) and withdrawn, and the flour classified, and analyzed for each parameter. Results obtained showed that all the test parameters, Water Retention Capacity (WRC), Swelling Ind...