A simple method to pre-concentrated derivative aromatic compounds on active carbon in column has been applied as stationary phase which is used to measure the concentration of derivative aromatic compounds in water samples by means of solid-phase extraction. To measure 250 cc water samples and 250mg active carbon could be applied. Next step is to measure the derivative aromatic compounds by inj...

Gasification of organic wastes coupled to syngas fermentation allows the recovery of carbon in the form of commodity chemicals, such as carboxylates and biofuels. Acetogenic bacteria ferment syngas to mainly two-carbon compounds, although a few strains can also synthesize four-, and six-carbon molecules. In general, longer carbon chain products have a higher biotechnological (and commercial) va...

Starting from unsaturated carbonyl compounds a mild new cascade reaction involving enolboration, rhodium-catalysed hydroformylation and intramolecular aldol addition in a regio- and diastereoselective fashion leads to cyclic compounds containing highly-functionalised quaternary carbon centres.

Carbon–carbon bond forming reactions have been at the centre of organic synthesis for decades allowing efficient and quick assembly of complex molecular structures. Among many others, organoboron compounds are oen the reagents of choice as they promote C–C bond formation reactions with high chemoand stereoselectivity without the need for expensive, sometimes unstable and toxic transition metal...

The formation of volatile compounds during abiotic degradation processes of aromatic compounds in soil has been the subject of many experimental studies but should be examined further. In this context, the present work investigates the natural formation of carbon suboxide using the model compounds catechol and 3,5-dichlorocatechol and also a soil sample from a peat bog. The measurements were pe...

We adopt a global optimization method to predict two-dimensional (2D) nanostructures through the particle-swarm optimization (PSO) algorithm. By performing PSO simulations, we predict new stable structures of 2D boron-carbon (B-C) compounds for a wide range of boron concentrations. Our calculations show that: (1) All 2D B-C compounds are metallic except for BC(3) which is a magic case where the...

abstract: the essential oil of plant material is the fraction isolated by means of several methods such as liquid carbon dioxide, microwaves and low or high pressure distillation employing boiling water or hot steam and is chemically defined as terpenoids namely monoterpene and the oxygenated form. since these compounds might be employed as flavour contributors due to their chemical nature, it ...

objective(s): carbon nanotubes have unique mechanical, electrical, and thermal properties, with potential different applications in nanomedicine, electronics, and other industries. these new applications of carbon nanotubes in different industries lead to the increased exposure risk of nanomaterials to human. up to now, all aspects of carbon nanotubes toxicity are not completely clear following...

Rhodopseudomonas palustris is an extremely successful bacterium that can be found in virtually any temperate soil or water sample on earth. It can grow by adopting one of the four major metabolic modes: photoautotrophic growth (energy from light and carbon from C1 compounds), photoheterotrophic growth (energy from light and carbon from organic compounds), chemoheterotrophic growth (carbon and e...

Carbon: the building block of life. You may have heard this phrase, but have you fully considered what it really means? All living things are made of elements, the most abundant of which are, oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorous. Of these, carbon is the best at joining with other elements to form compounds necessary for life, such as sugars, starches, fats, and proteins....