scholarly journals Aging as the main factor controlling PAH and polar-PAC (polycyclic aromatic compound) release mechanisms in historically coal-tar-contaminated soils

2018 ◽  
Vol 26 (2) ◽  
pp. 1693-1705 ◽  
Author(s):  
Marine Boulangé ◽  
Catherine Lorgeoux ◽  
Coralie Biache ◽  
Julien Michel ◽  
Raymond Michels ◽  
...  
Keyword(s):  
Aromatic Compound ◽  
Contaminated Soils ◽  
Coal Tar ◽  
Polycyclic Aromatic Compound ◽  
Release Mechanisms ◽  
Polycyclic Aromatic ◽  
Main Factor

Comparison of oxidoreductive enzyme activities in three coal tar creosote-contaminated soils

Soil Research ◽  
2019 ◽  
Vol 57 (8) ◽  
pp. 814 ◽  
Author(s):  
Arkadiusz Telesiński ◽  
Teresa Krzyśko-Łupicka ◽  
Krystyna Cybulska ◽  
Barbara Pawłowska ◽  
Robert Biczak ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Sandy Loam ◽  
Coal Tar ◽  
Loamy Sand ◽  
Clay Loam ◽  
Oxidoreductase Activity ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Polycyclic Aromatic ◽  
Negative Effect

This study used laboratory experiments to compare the effects of coal tar creosote on the activity of oxidoreductive enzymes in sandy loam, loamy sand and sandy clay loam soils. Different amounts of coal tar creosote were added to soil samples as follows: 0 (control), 2, 10 or 50 g kg–1 dry matter. The activity of soil dehydrogenases (DHAs), o-diphenol oxidase (o-DPO), catalase (CAT), nitrate reductase (NR) and peroxidases (POX) was determined. Contamination of soil with coal tar creosote affected oxidoreductase activity. Oxidoreductive enzyme activity following soil contamination with coal tar creosote was in the following order: DHAs > CAT > NR > POX > o-DPO in loamy sand and in sandy loam; and DHAs > POX > CAT > NR > o-DPO in sandy clay loam. The index of soil oxidoreductive activity (IOx) introduced in this study confirms the negative effect of coal tar creosote on oxidoreductase activity in soil. DHAs were the most sensitive to the contamination of soil with coal tar creosote. Moreover, the greatest changes in oxidoreductase activities were observed in loamy sand. Knowledge of the mechanism underlying the effects of coal tar creosote on oxidoreductive processes may enable development of a method for the bioremediation of polycyclic aromatic hydrocarbon-contaminated soils.

The reactions of linear conjugated diynes with Dicarbonyl(η-cyclopentadienyl)- cobalt and -rhodium

1975 ◽  
Vol 28 (2) ◽  
pp. 285 ◽  
Author(s):  
RS Dickson ◽  
LJ Michel
Keyword(s):  
Thermal Degradation ◽  
Aromatic Compound ◽  
Substituted Benzenes ◽  
Polycyclic Aromatic Compound ◽  
Organic Products ◽  
Polycyclic Aromatic ◽  
Alkyne Complexes ◽  
Conjugated Diynes

The reactions of (η-C5H5)Co(CO)2 with the diynes hexa-2,4-diyne and 1,4- diphenylbutadiyne give three isomers of the cyclopentadienone complexes (C5H5)Co[(RC2C2R)2CO], R = Me or Ph, and two isomers of the tris-alkyne complexes (C5H5)2Co2(RC2C2R)3CO, R = Me or Ph. Organic products of formula (RC2C2R)3, R = Me or Ph, (MeC2C2Me)5, and (PhC2C2Ph)3CO have been isolated also. Two isomers of (RC2C2R), were separated and were identified as the 1,2,4-(R)3-3,5,6-(C2R)3- and the 1,3,5-(R)3-2,4,6-(C2R)3-benzenes. The compound (PhC2C2Ph)3CO is believed to be tris(phenylethynly)triphenylcycloheptatrienone, and (MeC2C2Me)5 is probably a polycyclic aromatic compound. Thermal degradation of the complexes (C5H5)2CO2(RC2C2R)3CO gives the substituted benzenes (RC2C2R)3. ��� The reaction of (η-C5H5)Rh(CO)2 and hexa-2,4-diyne gives the cyclopentadienone complex(C5H5)Rh[(MeC2C2Me)2CO] and the cycloheptatrienone complex (C5H5)Rh[(MeC2C2Me)3CO].Two isomers of the substituted benzene (MeC2C2Me)3 were obtained also.

scholarly journals Study of Microemulsion Composition Effect over Phosphorescence Emission of a Polycyclic Aromatic Compound

2003 ◽  
Vol 23 (2) ◽  
pp. 237-248
Author(s):  
A. Segura Carretero ◽  
C. Cruces-Blanco ◽  
M. Sánchez Polo ◽  
A. Fernández Gutiérrez ◽  
A. Fernández-Nieves
Keyword(s):  
Aromatic Compound ◽  
Composition Effect ◽  
Polycyclic Aromatic Compound ◽  
Polycyclic Aromatic ◽  
Phosphorescence Emission

scholarly journals A 150-year record of polycyclic aromatic compound (PAC) deposition from high Andean Cajas National Park, southern Ecuador

2018 ◽  
Vol 621 ◽  
pp. 1652-1663 ◽  
Author(s):  
Benjamin A. Musa Bandowe ◽  
Lea Fränkl ◽  
Martin Grosjean ◽  
Wojciech Tylmann ◽  
Pablo V. Mosquera ◽  
...  
Keyword(s):  
Aromatic Compound ◽  
National Park ◽  
Polycyclic Aromatic Compound ◽  
Southern Ecuador ◽  
Polycyclic Aromatic

scholarly journals Anticancer activity studies of novel metal complexes of ligands derived from polycyclic aromatic compound via greener route

2020 ◽  
Vol 914 ◽  
pp. 121219
Author(s):  
Mahantesh Kumbar ◽  
Sangamesh A. Patil ◽  
Shivakumar S. Toragalmath ◽  
Shivashankar M. Kinnal ◽  
Arun Shettar ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Anticancer Activity ◽  
Aromatic Compound ◽  
Polycyclic Aromatic Compound ◽  
Polycyclic Aromatic
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