We consider a competitive version of the traditional aggregate production planning model with capacity constraints. In the general case, multiple products are produced by a few competing producers (oligopoly) with limited capacities. Production quantities, prices and consequently profits depend on production and allocation decisions of each producer. In addition, there is competition for the ra...

Comprehensive two-dimensional gas chromatography (GC x GC) has been investigated for the characterization of high valuable petrochemical samples from dehydrogenation of n-paraffins, Fischer-Tropsch and oligomerization processes. GC x GC separations, performed using a dual-jets CO2 modulator, were optimized using a test mixture representative of the hydrocarbons found in petrochemicals. For comp...

The main objective of this study is to test the relationship between numbers of variables representing the firm characteristics (market-related variables) and the extent of voluntary disclosure levels (forward-looking disclosure) in the annual reports of Egyptian firms listed on the Egyptian Stock Exchange. The results show that audit firm size is significantly positively correlated (in all the...

Itaconic acid (IA) is a well-known bio-based monounsaturated organic (C5H6O4), with white color and crystalline structure. It widely used in the agro-based, plastics, textile, paint pharmaceutical sectors, owing to its flexible structure, due presence of functional groups covalent double bonds. IA an alternative petrochemicals acrylic methacrylic acids. Commercial manufacturing using Aspergillu...

Zeolites are minerals with a wide application in the field of Petrochemicals, mainly as catalysts, oil refining processes, but their structure and composition also make them good filter materials, for that reason they used processes. Water treatment, when an well is exploited, large amount water obtained from reservoir, known production water, which treated reused injection processes same produ...

Sustainable plastics sourced without virgin petrochemicals, that are easily recyclable and with potential for degradation at end of life, urgently needed. Here, copolymersand blends meeting these criteria efficiently prepared using a single catalyst existing commercial monomers l-lactide, propylene oxide, maleic anhydride. The selective, one-reactor polymerization applies an industry-relevant t...