Results 41 to 50 of about 7,922 (214)

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

Effect of some halogenated hydrocarbons on the flame speed of methane

, 1966
The effects of five halogenated hydrocarbons on the flame speed of methane have been studied. Bromides are more effective in reducing flame speeds than are chlorides and the reduction in flame speed is proportional to the amount of inhibitor ...
Halpern, Carl
core   +1 more source

SigmaFormer: Augmenting transformer encoders with COSMO sigma profiles for pure component property prediction

AIChE Journal, EarlyView.
Abstract Transformer‐based molecular models pretrained on SMILES strings demonstrate strong performance in property prediction. However, these model often lack explicit integration of molecular surface charge distributions that govern intermolecular interactions such as hydrogen bonding and polarity.
Tae Hyun Kim, Silabrata Pahari, Joseph Sang‐Il Kwon   +2 more
wiley   +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

Neuropsychological Symptoms among Metal Workers Exposed to Halogenated Hydrocarbons

, 1986
A cross-sectional study was designed as a questionnaire investigation with the aim of mapping the load of symptoms, especially signs of neuropsychological dysfunction in relation to degreasing with halogenated hydrocarbons.
Svend Sabroe, Kurt Rasmussen
core   +1 more source

C₂-C₁₀ hydrocarbon emissions from a boreal wetland and forest floor [PDF]

Biogeosciences, 2006
Emissions of various C2-C10 hydrocarbons (VOCs) and halogenated hydrocarbons (VHOCs) from a boreal wetland and a Scots pine forest floor in south-western Finland were measured by the static chamber technique. Isoprene was the main non-methane hydrocarbon
H. Hellén, H. Hakola, K.-H. Pystynen, J. Rinne, S. Haapanala   +4 more
doaj  

Analysis of relative concentration of ethanol and other odorous compounds (OCs) emitted from the working surface at a landfill in China.

PLoS ONE, 2015
Estimating odor emissions from landfill sites is a complicated task because of the various chemical and biological species that exist in landfill gases.
Dong Li, Wenjing Lu, Yanjun Liu, Hanwen Guo, Sai Xu, Zhongyuan Ming, Hongtao Wang   +6 more
doaj   +1 more source

Prediction of the acentric factor of some halogenated hydrocarbons via group contribution techniques

Journal of Nigerian Society of Physical Sciences
In this study, trends in the prediction of acentric factors of halogenated alkanes (HAs) were investigated using two group contribution techniques. The examination of discrepancies between predicted and experimental values for both methods served to ...
Charles Otobrise, Godwin Eferurhobo
doaj   +1 more source

Microbial Enzymes Used in Bioremediation

Journal of Chemistry, 2021
Emerging pollutants in nature are linked to various acute and chronic detriments in biotic components and subsequently deteriorate the ecosystem with serious hazards.
Sobika Bhandari, Darbin Kumar Poudel, Rishab Marahatha, Sonika Dawadi, Karan Khadayat, Sitaram Phuyal, Shreesti Shrestha, Santosh Gaire, Kusum Basnet, Uddhav Khadka, Niranjan Parajuli   +10 more
doaj   +1 more source

Efficient Trifluoromethylation of Halogenated Hydrocarbons Using Novel [(bpy)Cu(O₂CCF₂SO₂F)₂] Reagent

Molecules
This study introduces a novel trifluoromethylating reagent, [(bpy)Cu(O2CCF2SO2F)2], notable for not only its practical synthesis from cost-effective starting materials and scalability but also its nonhygroscopic nature.
Xiong Wu, Xin Qiu, Wenrun Lou, Shengxue Zhang, Chaoyi Zhang, Xiaoyu Ma, Chao Liu   +6 more
doaj   +1 more source