Results 1 to 10 of about 10,017 (124)

The Hall rule in fluoranthene-type benzenoid hydrocarbons [PDF]

Journal of the Serbian Chemical Society, 2008
The applicability of the Hall rule (linear relation between the total π-electron energy and the number of Kekulé structures) was investigated in the case of fluoranthene-type benzenoid hydrocarbons. It was found that the originnal Hall rule is not obeyed,
Đurđević Jelena, Radenković Slavko, Gutman Ivan   +2 more
doaj   +4 more sources

On π-electron conjugation in the five-membered ring of fluoranthene-type benzenoid hydrocarbons [PDF]

Journal of the Serbian Chemical Society, 2009
A fluoranthene-type benzenoid hydrocarbon (FTBH) is a polycyclic conjugated system obtained by joining two ordinary benzenoid hydrocarbons so as to form a five-membered ring.
Gutman Ivan, Đurđević Jelena
doaj   +3 more sources

Verifying the PCP-rule by five-center bond indices [PDF]

Journal of the Serbian Chemical Society, 2009
According to the recently discovered PCP-rule, the (stabilizing) energy-effect of the cyclic conjugation in the 5-membered ring of acenaphthylene- and fluoranthene-type polycyclic conjugated hydrocarbons increases with the number of phenyl ...
JELENA ĐURĐEVIĆ, IVAN GUTMAN, ROBERT PONEC   +2 more
doaj   +3 more sources

TD-DFT Monitoring of the Absorption Spectra of Polycyclic Aromatic Hydrocarbons over the Basque Country, Spain

Sustainable Chemistry, 2021
Brown carbon is a type of carbonaceous aerosol with strong light absorption in the ultraviolet and visible wavelengths that leads to radiative forcing.
Patricia González-Berdullas, Luís Pinto da Silva   +1 more
doaj   +1 more source

Environmental Assessment of Polycyclic Aromatic Hydrocarbons pollutants in the waters of the side branches of the Shatt Al-Arab River

المجلة العراقية للاستزراع المائي, 2021
This study was conducted in the water branches of Shatt Al-Arab River. Water samples were collected from six stations during 2013. Gas chromatography was used to identify the concentrations and type of Polycyclic Aromatic Hydrocarbons (PAHs).
Hamid T. Al-Saad, Dhfar. Dh. Al-Khion, Ebtihal S. Majeed, Abas A. Hantoush, Salah M. Saleh, Abdulzahra A. Alhello   +5 more
doaj   +1 more source

Half-lives of PAHs and temporal microbiota changes in commonly used urban landscaping materials [PDF]

PeerJ, 2018
Background Polycyclic aromatic hydrocarbons (PAHs) accumulate in urban soils, and PAH contamination can change soil microbial community composition.
Marja I. Roslund, Mira Grönroos, Anna-Lea Rantalainen, Ari Jumpponen, Martin Romantschuk, Anirudra Parajuli, Heikki Hyöty, Olli Laitinen, Aki Sinkkonen   +8 more
doaj   +2 more sources

Evaluation of Polycyclic Aromatic Hydrocarbons in Smoked Cheeses Made in Poland by HPLC Method

Molecules, 2022
Smoked cheeses are particularly popular among consumers for their flavor and aroma. Of interest, therefore, is the health aspect related to the likelihood of polycyclic aromatic hydrocarbons (PAHs), which are known carcinogens found in smoked products ...
Magdalena Polak-Śliwińska, Beata Paszczyk, Mariusz Śliwiński   +2 more
doaj   +1 more source

The Threat of Environmental Pollution with Harmful Substances, on the Example of Uncontrolled Fires in Landfills and Actions Aimed at Reducing it

Safety & Fire Technology, 2021
Aim: This article attempts to bring closer the issues related to the emission of harmful substances to the environment. The example of two fires that occurred in Poland in 2018 was used – in the former “Boruta” plant in Zgierz and in a landfill in ...
Krzysztof Cygańczuk, Paweł Janik
doaj   +1 more source

Polycyclic Aromatic Hydrocarbons (PAHs) and Metals in Diverse Biochar Products: Effect of Feedstock Type and Pyrolysis Temperature

Toxics, 2023
Biochar’s agricultural and environmental benefits have been widely demonstrated; however, it may cause environmental contamination if it contains large amounts of pollutants such as polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs ...
Hattan A. Alharbi, Khaled D. Alotaibi, Mohamed H. EL-Saeid, John P. Giesy   +3 more
doaj   +1 more source

Polycyclic Aromatic Hydrocarbons (PAHs) Occurrence in Traditionally Smoked Chicken, Turkey and Duck Meat

Agriculture, 2022
An increasingly high interest is given to the sensory, nutritional, and sanogenic qualities of meat. Considering that poultry meat is nowadays the main quantitatively demanded meat for human consumption, its quality is largely verified and monitored ...
Cristian Ovidiu Coroian, Aurelia Coroian, Anca Becze, Adina Longodor, Oana Mastan, Răzvan-Mihail Radu-Rusu   +5 more
doaj   +1 more source