Results 21 to 30 of about 123,857 (304)

A New Macrodiolide and Two New Polycyclic Chromones from the Fungus Penicillium sp. SCSIO041218

open access: yesMolecules, 2019
A new macrodiolide, mangrovlide A (1) and two new polycyclic chromones, penixanthones C (2) and D (3), as well as four other known compounds (4−7), have been isolated from the mangrove sediment derived fungus Penicillium sp.
Jingxia Huang   +5 more
doaj   +1 more source

Mutagenicity of chlorinated polycyclic aromatic compounds

open access: yesEcotoxicology and Environmental Safety, 1987
The catalytic chlorination of polycyclic aromatic hydrocarbons leads to the formation of complex mixtures of isomers analogous to those found in fly ash samples of an incineration plant for radioactive waste. Therefore chlorination mixtures of chrysene, pyrene, and fluoranthene were analyzed and characterized by gas chromatography-mass spectrometry ...
A L, Bhatia, H, Tausch, G, Stehlik
openaire   +2 more sources

MONITORING OF POLYCYCLIC AROMATIC HYDROCARBONS IN PRUNUS SPINOSA TREE COMPONENTS FROM CLUJ-NAPOCA AREA, ROMANIA

open access: yesAgricultura, 2022
Polycyclic aromatic hydrocarbons (PAHs) occur as contaminants in different types of food mainly as a result of environmental pollution, food packaging and processing. The levels observed in food are determined by the source of the contamination.
Babalau-Fuss Liliana Vanda   +2 more
doaj  

Development of new chiral auxiliary from the Diels-Alder adduct endo-tricyclo[6.2.1.02,7] undeca-4 ,9-dien-3 ,6-dione

open access: yesOrbital: The Electronic Journal of Chemistry, 2012
Stereochemistry control is very important in organic synthesis and it is a basic challenge in asymmetric synthesis. An approach widely used is making use of chiral auxiliary compounds.
Suély Copini   +5 more
doaj   +1 more source

Enantioselective synthesis of tricyclic amino acid derivatives based on a rigid 4-azatricyclo[5.2.1.02,6]decane skeleton

open access: yesBeilstein Journal of Organic Chemistry, 2009
An enantioselective route to four tricyclic amino acids and N-tosylamides, composed of a central norbornane framework with a 2-endo,3-endo-annelated pyrrolidine ring and a 5-endo-C1 or -C2 side chain, has been developed. A key intermediate was the chiral,
Matthias Breuning   +6 more
doaj   +1 more source

3,10,14,21-Tetrakis(4-methoxyphenyl)pentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4(9),5,7,10,13,15(20),16,18-decaen-12-one chloroform monosolvate

open access: yesActa Crystallographica Section E, 2014
The asymmetric unit of the title compound, C49H36O6·CHCl3, contains half an organic molecule, the complete molecule being generated by the operation of a crystallographic twofold rotation axis, and half a highly disordered chloroform molecule.
S. Gopinath   +4 more
doaj   +1 more source

Antimycobacterial Activity, Synergism, and Mechanism of Action Evaluation of Novel Polycyclic Amines against Mycobacterium tuberculosis

open access: yesAdvances in Pharmacological and Pharmaceutical Sciences, 2021
Mycobacterium tuberculosis has developed extensive resistance to numerous antimycobacterial agents used in the treatment of tuberculosis. Insufficient intracellular accumulation of active moieties allows for selective survival of mycobacteria with drug ...
Erika Kapp   +8 more
doaj   +1 more source

Sand to Root Transfer of PAHs and PCBs by Carrots Grown on Sand with Pure Substances and Biosolids Amended Sand [PDF]

open access: yes, 2006
A study on behaviour of trace organic compounds (Polycyclic Aromatic Hydrocarbons, PAH, and Polychlorinated Biphenyls, PCB) in a sand-plant system has been carried out, with the reclamation of wastewater treatment plant biosolids for agriculture in mind.
Patria, Lucie   +3 more
core   +3 more sources

P-resonant control for the neutral point of three phase inverter [PDF]

open access: yes, 2014
In this project, a Proportional resonant (PR) current controller is proposed to maintain a balanced neutral point for a three-phase four wire inverter, which can be used in microgrid applications. The neutral-point circuit consists of a conventional
Omar Aashour, Omar Ali
core   +1 more source

Determinação dos hidrocarbonetos saturados e policíclicos aromáticos presentes no material particulado da atmosfera amazônica Chemical composition of aerosol collected in the amazon forest

open access: yesQuímica Nova, 1998
It was identified and quantified several organic compounds in the atmosphere of a site into Amazon Basin with high impact of biomass burning emission.
Pérola de Castro Vasconcellos   +5 more
doaj   +1 more source

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