Results 61 to 70 of about 36,603 (263)

AKARI near-infrared spectroscopy of the aromatic and aliphatic hydrocarbon emission features in the galactic superwind of M 82

, 2012
Aims. We investigate the properties of hydrocarbon grains in the galactic superwind of M 82. Methods. With AKARI, we performed near-infrared (2.5 - 4.5 um) spectroscopic observations of 34 regions in M 82 including its northern and southern halos ...
Alton, D. Ishihara, Duley, Engelbracht, Fukui, H. Kaneda, Hoopes, Kaneda, Kaneda, Karachentsev, Kwok, Leeuw, Lu, Lynds, M. Yamagishi, Mayya, Micelotta, Mori, Murakami, Ohyama, Ohyama, Onaka, Onaka, Roussel, Schutte, Shopbell, Smith, Strickland, Sturm, T. Kondo, T. Onaka, T. Suzuki, Tielens, Veilleux, Walter, Y. C. Minh, Yamagishi, Yoshida, Yun, Yun   +39 more
core   +1 more source

Methane Pyrolysis Performance in Catalytic Molten Media for Hydrogen Production From the Perspective of Bubble Column Reactor Design and Configuration

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In the hydrogen production routes from natural gas (methane), methane pyrolysis offers a cleaner option than the established steam methane reforming by producing CO2‐free hydrogen. However, in fixed bed reactors over solid catalysts, this technology experiences rapid catalyst deactivation due to carbon (coke) deposition encapsulating its ...
Muhammad Irfan Fakarudin, Luqmanulhakim Baharudin, Matthew J. Watson, Wan Nor Roslam Wan Isahak   +3 more
wiley   +1 more source

Strategies for producing biochars with minimum PAH contamination [PDF]

With the aim to develop initial recommendations for production of biochars with minimal contamination with polycyclic aromatic hydrocarbons (PAHs), we analysed a systematic set of 46 biochars produced under highly controlled pyrolysis conditions.
Buss, Wolfram, Graham, Margaret C., MacKinnon, Gillian, Mašek, Ondřej   +3 more
core   +1 more source

Tuning the Twist by Molecular Design: A New Strategy for Hexabenzocoronene‐Containing Helical Twistacene

Chemistry – A European Journal, EarlyView.
An efficient Scholl–based strategy enables precise control of the C–C bond to access the first hexabenzocoronene–containing helical twistacene (NG2). The resulting nanographene shows pronounced helical distortion, high stability, enhanced solubility, and promising redox and optoelectronic properties.
Juan P. Mora‐Fuentes, Daniel Villar‐Castro, J. Francisco Barbosa‐de‐Bessa, Daniel Aranda, Frank Hampel, Dolores Pérez, M. Eugenia Pérez‐Ojeda, Diego Peña, Andreas Hirsch   +8 more
wiley   +1 more source

Environmental Assessment of Polycyclic Aromatic Hydrocarbon Concentrations in Air at Thermal South Power Station of Baghdad

Iraqi Journal of Chemical and Petroleum Engineering, 2014
Sixteen polycyclic aromatic hydrocarbons (PAHs) concentrations were measured in aerosol samples collected for the period from April 2012 to February 2013 at thermal south power station of Baghdad.
Adnan H. Afaj, Muthna Shanshal, Israa M. H. Almousawi, Safauldeen Adnan A.   +3 more
doaj  

Determination of total polycyclic aromatic hydrocarbon (PAHs) in road dust along Kuantan-Gambang road [PDF]

, 2012
Polycyclic Aromatic Hydrocarbons , (PAHs) is a type of potential environments pollutants which consists of fused aromatic rings. PAHs do not contain heteroatoms or carry any substituents. Anthracene is one of the simplest examples of PAHs.
Nur Arifah , Jaafar
core  

Interplay of Orbital Overlap and Exciton Coupling in the Optical Properties of Adamantylethynyl‐Substituted Pyrene Molecular Crystals

Chemistry – A European Journal, EarlyView.
Sterically shielded adamantylethynyl‐substituted pyrenes form quasi‐one‐dimensional π‐stacks that enable direct quantification of solution‐to‐crystal spectral shifts. The optical response is dominated by band dispersion arising from frontier crystal orbitals, while excitonic contributions are secondary.
Benedikt Herbert, Kazutaka Shoyama
wiley   +1 more source

First direct detection of large polycyclic aromatic hydrocarbons on asteroid (162173) Ryugu samples: An interstellar heritage

Natural Sciences
Polycyclic aromatic hydrocarbons (PAHs) are considered major players in the physics and chemistry of star‐ and planet‐forming regions. The interstellar PAH hypothesis is based on our understanding of the origin of the aromatic infrared bands (AIBs), a ...
Hassan Sabbah, Ghylaine Quitté, Karine Demyk, Christine Joblin   +3 more
doaj   +1 more source

Atmospheric Deposition of Organic Pollutants: A Comprehensive Review of Sampling and Analytical Methodologies. [PDF]

Anal Sci Adv
ABSTRACT Atmospheric deposition of organic pollutants plays a crucial role in the transport and fate of contaminants in the environment, with implications for ecosystem health and human exposure. Persistent organic pollutants (POPs), polycyclic aromatic hydrocarbons (PAHs) and microplastics are increasingly recognized as transboundary threats due to ...
Smoljo I, Mendaš G, Pehnec G.
europepmc   +2 more sources

Polycyclic aromatic hydrocarbons and esophageal squamous cell carcinoma [PDF]

, 2012
Esophageal cancer (EC) is the 8th most common cancer and the 6th most frequent cause of cancer mortality worldwide. Esophageal squamous cell carcinoma (ESCC) is the most common type of EC.
Dawsey, S.M., Malekzadeh, R., Roshandel, G., Semnani, S.   +3 more
core