polycyclic aromatic hydrocarbons (pahs) are one of the most important organic pollutants frequently found in the environment. in this experiment, the effect of phytoremediation as a cost effective method was studied on the concentration of anthracene (c14h10) which is one of pahs. the effect of sorghum (v1), hairy vetch (v2) and oat (v3) was studied under four concentrations of anthracene (s1, ...

Aromatic rings exhibit defined interactions via the unique aromatic π face. Aromatic amino acids interact favorably with proline residues via both the hydrophobic effect and aromatic-proline interactions, C-H/π interactions between the aromatic π face and proline ring C-H bonds. The canonical aromatic amino acids Trp, Tyr, and Phe strongly disfavor a polyproline helix (PPII) when they are prese...

the comparison of the effects of effleurage massage with aromatic oil and non aromatic oil on fatigue severity in women with multiple sclerosis bahraini s , naji sa * , mannani r , bekhradi r received: 15june, 2011 accepted: 5september, 2011 abstract background & aims: fatigue is one of the most common signs in multiple sclerosis and also it is one of the common reasons of low quality of life a...

in iranian folk medicine, especially in west of the country, the aromatic water of rheum ribes has been used for several purposes such as fever reduction.  despite the widespread use of this plant as food or as a medicinal plant, there is still lack of information on its toxicity profile.                                                                in the present study we aimed to evaluate th...

While, intramolecular hydrogen bonds have attracted the greatest attention in studies of peptide conformations, the recognition that several other weakly polar interactions may be important determinants of folded structure has been growing. Burley and Petsko provided a comprehensive overview of the importance of weakly polar interactions, in shaping protein structures. The interactions between ...

one main group of organic chemistry is related to the aromatic compounds. in the present work, we replaced the ch group of benzene by silicon and nitrogen analogues. then, density functional theory (dft) calculations were carried out for six-membered heterocyclic si-n aromatic rings. full geometry optimizations were performed in gas-phase, and at b3lyp level using 6-311++g(d,p) and cbsb7 basis ...

many aldehydes are important components of natural flavours. they are used in food, cosmetic, and biomedical industries in large amounts. plant cells or microorganisms carry out their production by biotransformation, which is one of the biotechnological methods that allow them to be defined as 'natural'. cell cultures of silybum marianum and peganum harmala have been studied with a vi...

the facile and high yield synthesis of a new series of dibenzophenones in the presence of polyphosphoric acid (ppa) together with their cyclization to corresponding moni and dixanthones are described. the aromatic nucleophilic substitution of these new compounds are also studied.

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 groundwa...