Results 31 to 40 of about 26,984 (232)

Measurements of hydrocarbon emissions from a boreal fen using the REA technique [PDF]

Biogeosciences, 2006
Fluxes of biogenic volatile organic compounds (VOC) and methane were measured above a boreal fen. Vegetation on the fen is dominated by Sphagnum mosses and sedges.
S. Haapanala, J. Rinne, K.-H. Pystynen, H. Hellén, H. Hakola, T. Riutta   +5 more
doaj  

Hydrogen Purity Analysis: Suitability of Sorbent Tubes for Trapping Hydrocarbons, Halogenated Hydrocarbons and Sulphur Compounds

Applied Sciences, 2019
The ISO 14687-2 standard sets requirements for the purity of the hydrogen that is delivered at refuelling stations. These specifications cover a wide range of impurities and include challenging measurements, mainly due to the very low levels of the ...
Karine Arrhenius, Haleh Bohlen, Oliver Büker, Iris de Krom, Dita Heikens, Janneke van Wijk   +5 more
doaj   +1 more source

Global squid contamination by halogenated polycyclic aromatic hydrocarbons and its trade induced risk transfer

Environment International, 2023
Squid is traded globally as an important food resource. However, the occurrence of carcinogenic halogenated polycyclic aromatic hydrocarbons (HPAHs) in squid and the risk of their transfer through trade is little understood or recognized.
Jingqian Xie, Ling Tao, Qiang Wu, Shuyi Tu, Bilin Liu, Tian Lin, Lili Yang, Cui Li, Guorui Liu   +8 more
doaj   +1 more source

Distributions of brominated organic compounds in the troposphere and lower stratosphere [PDF]

, 1999
A comprehensive suite of brominated organic compounds was measured from whole air samples collected during the 1996 NASA Stratospheric Tracers of Atmospheric Transport aircraft campaign and the 1996 NASA Global Tropospheric Experiment Pacific Exploratory
Atlas, EL, Blake, DR, Flocke, F, Lee-Taylor, JM, Lueb, RA, Schauffler, SM, Stroud, V, Travnicek, W   +7 more
core   +1 more source

New classes of organic pollutants in the remote continental environment – Chlorinated and brominated polycyclic aromatic hydrocarbons on the Tibetan Plateau

Environment International, 2020
Halogenated polycyclic aromatic hydrocarbons are carcinogenic and ubiquitous environmental organic pollutants. The abundance and sources of these compounds have not been studied in remote environments.
Rong Jin, Duo Bu, Guorui Liu, Minghui Zheng, Gerhard Lammel, Jianjie Fu, Lili Yang, Cui Li, Ahsan Habib, Yuanping Yang, Xiaoyun Liu   +10 more
doaj   +1 more source

Mixing ratios of volatile organic compounds (VOCs) in the atmosphere of Karachi, Pakistan [PDF]

, 2002
Mixing ratios of carbon monoxide (CO), methane (CH4), non-methane hydrocarbons, halocarbons and alkyl nitrates (a total of 72 species) were determined for 78 whole air samples collected during the winter of 1998-1999 in Karachi, Pakistan.
Barletta, B, Blake, DR, Khwaja, HA, Meinardi, S, Rowland, FS, Simpson, IJ   +5 more
core  

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Pd-Catalyzed Direct Diarylation of Sodium Hypophosphite Enables the Synthesis of Diarylphosphonates

Molecules
A facile and efficient method for synthesizing diarylphosphinates from alcohols and aryl halides, using stable, green, and readily available sodium hypophosphite as a phosphorus source, is disclosed herein for the first time.
Jin Yang, Dangwei Qian, Gangwei Wang, Shangdong Yang   +3 more
doaj   +1 more source

Discovery of significant atmospheric emission of halogenated polycyclic aromatic hydrocarbons from secondary zinc smelting

Ecotoxicology and Environmental Safety, 2022
Chlorinated and brominated polycyclic aromatic hydrocarbons (Cl/Br-PAHs) are emerging persistent organic pollutants. Current knowledge on the emissions of Cl/Br- PAHs is far insufficient for source control, much less on their formation mechanisms.
Yuanping Yang, Guorui Liu, Minghui Zheng, Shuting Liu, Qiuting Yang, Xiaoyun Liu, Mingxuan Wang, Lili Yang   +7 more
doaj   +1 more source

Substrate‐Affinitive P‐Type Azapolycyclic Photosensitizer for Chemoselective Nitrilization Under Mild Conditions

Advanced Science, EarlyView.
We developed a series of quinoxalinoquinoxaline (QQ) photosensitizers featuring high and tunable excited‐state reduction potentials (E(PC•+/PC*) = –1.76 to –2.05 V vs. SCE). Their hydrogen‐bonding interaction with carbonyl substrates enables selective single‐electron transfer events for selective nitrilization of 1° amides, offering a tunable ...
Seongwoo Bae, Dongwook Kim, Jinwoo Kim
wiley   +1 more source