All requirements for the express control of unstable hydrocarbon media and devices their implementation to obtain reliable measurement results are determined. The features volatile mixtures with industrial small-sized refractometers operating on effect total internal reflection considered. new method determining components ratio between concentrations them in a mixture is developed. There no an...

3,3′-ditetradecyloxacarbocyanine (DiOC14(3)) and 3,3′-Dioctadecyloxacarbocyanine (DiOC18(3)) are lipophilic carbocyanine dyes with a conjugated polymethine backbone two long hydrocarbon tails. In this paper, we report the formation of Davydov-split aggregates DiOC14(3) DiOC18(3) in methanol/water mixtures without ammonia, which show blue-shifted H-band red-shifted J-band respect to monomer band...

an aquifer located within a petroleum processing plant in moín, costa rica, suffers hydrocarbon pollution. this study aimed to determine the ability of indigenous microorganisms from this site to degrade polycyclic aromatic hydrocarbons (pahs) to evaluate the feasibility of an eventual bioremediation process. aerobic conditions were found in the aquifer, while microbial analyses of the groundw...

In subsequent years the construction industry in our country is developing very rapidly. Accordingly, requirements for rational and efficient use of raw materials energy resources building are also increased. To effectively solve problem prefabricated, monolithic concrete reinforced structures with high strength durability mixtures, special chemical additives, widespread superplasticizers requi...