The nature and evolution of the hydrocarbon pool (HP) species during the Methanol-to-Olefins (MTO) process for three small-pore zeolite catalysts, with a different framework consisting of large cages interconnected by small eight-ring windows (CHA, DDR, and LEV) was studied at reaction temperatures between 350 and 450 °C using a combination of operando UV-vis spectroscopy and online gas chromat...

Aryl hydrocarbon hydroxylase of mouse skin is inducible by benz(a)anthracene or 7,12-dimethylbenz(a)anthracene (DMBA) and is inhibited by 7,8-benzoflavone. 7,8-Benzo flavone inhibits the formation of covalently bound complexes of DMBA with DNA, RNA, and protein and also inhibits tumor formation caused either by a single application of DMBA, followed by croton oil treatment, or by the repeated a...

fischer-tropsch catalysts with high activity and selectivity for olefins were produced using mordenite type sio2/al2o3= 12, 20, 28, 62 zeolite supported iron carbonyl compounds and were characterized by x-ray powder diffraction. the adsorptionof volatile fe(co)5 on the support surface was carried out under vacuum at room temperature. reduction les were monitored by vibrating sample magnetometer...

the southeastern part of turkey is quite rich, fertile and mature in terms of hydrocarbonseepages. while the use of the related sources meet the energy demand, it damages the environment and humanhealth. in this study, several geochemical methods were applied to analyze the hydrocarbon sepage samplesobtained from seven towns in the province of adiyaman where is very close to the oil production ...

A tandem arylation/oxidation of diarylmethanes for the convenient synthesis of unsymmetrical triarylmethanols bearing different aryl and heteroaryl groups is described. A Pd(OAc)2-NiXantphos catalyst system efficiently catalyzed arylation of weakly acidic sp3-hybridized C-H bonds of diarylmethanes with aryl bromides, and the arylation products were then oxidized in situ to carbinols by simply o...

the mandovi estuary is highly influenced by mining and tourism related activities in the centralwest coast of india. vertical fluxes and accumulation of petroleum hydrocarbons (phcs) in three sedimentcores (d1, c1 and og) from the mandovi estuary were assessed using ultra-violet fluorescence (uvf)spectroscopy. the range of phcs values in estuarine sediments varied from 5.4 to 12.34 μg/g enrichm...

patients and methods medical records of patients were analyzed retrospectively. results of the six patients, 83.3% (n = 5) were male and 16.7% (n = 1) were female, with a mean age of 2.1 ± 0.49 years. the most common clinical signs were dyspnea (83.3%), fever (66.6%), and vomiting (66.6%). owing to supportive treatments and the combined steroid treatment, respiratory distress diminished and the...

this work studies the biosurfactants production which enables the diesel biodegradation byusing mixed microbial consortia from polluted sites. it was carried out by culturing three microbial consortia(named as xa, xb and xc) obtained from polluted soils, and enriched in diesel as sole carbon source.batchexperiments were done to study the effects of three variables (temperature,hydrocarbon conce...

since hydrocarbon sources have an important role in development of industry and technology, exploration of them has been lionized by human. the seismic reflection method is one of the most applicable investigative methods to identify the hydrocarbon reservoirs, but in some cases this method does not work well because of geology conditions and wave attenuation in depth. thus, some exploration me...

Manipulating the taxonomic richness of communities can impact numerous community functions. One proposed explanation is that certain taxa exploit resources or habitat space others cannot, leading to additive contributions process rates. It interest learn whether reverse could also be true. That is, increasing in an environment size, composition, and function? We mimicked hydrocarbon spills unco...