Results 1 to 10 of about 4,722 (253)

Transformation of the cyclohexane ring to the cyclopentane fragment of biologically active compounds [PDF]

Beilstein Journal of Organic Chemistry
The review is devoted to strategies for contraction of six-membered cycles in the synthesis of functionalized cyclopentane/enones, which are biologically active compounds.
Natalya Akhmetdinova, Ilgiz Biktagirov, Liliya Kh. Faizullina   +2 more
doaj   +2 more sources

Association between short-term exposure to ambient ozone concentration and influenza incidence in Kawasaki City, Japan: a time-stratified case-crossover analysis [PDF]

BMC Public Health
Background Seasonal influenza continues to pose a significant global public health challenge owing to its considerable disease burden, making it imperative to elucidate its potential driving factors.
Keita Wagatsuma
doaj   +2 more sources

Photocyclization of Alkenes and Arenes: Penetrating Through Aromatic Armor with the Help of Excited State Antiaromaticity [PDF]

Chemistry
This review focuses on photocyclization reactions involving alkenes and arenes. Photochemistry opens up synthetic opportunities difficult for thermal methods, using light as a versatile tool to convert stable ground-state molecules into their reactive ...
Nikolas R. Dos Santos, Judy I. Wu, Igor V. Alabugin   +2 more
doaj   +2 more sources

Seasonal variations and environmental influences on dry eye operations in Japan [PDF]

Scientific Reports
The surface of the eye is constantly exposed to the external environment and is affected by atmospheric conditions and air pollution, and dry eye is a typical ocular surface disease.
Yoshiaki Kabata, Ryo Terauchi, Tadashi Nakano   +2 more
doaj   +2 more sources

Influence of photochemical loss of volatile organic compounds on understanding ozone formation mechanism [PDF]

Atmospheric Chemistry and Physics, 2022
Volatile organic compounds (VOCs) tend to be consumed by atmospheric oxidants, resulting in substantial photochemical loss during transport. An observation-based model was used to evaluate the influence of photochemical loss of VOCs on the sensitivity ...
W. Ma, Z. Feng, Z. Feng, J. Zhan, Y. Liu, P. Liu, P. Liu, P. Liu, C. Liu, C. Liu, C. Liu, Q. Ma, Q. Ma, Q. Ma, K. Yang, Y. Wang, H. He, H. He, H. He, M. Kulmala, M. Kulmala, Y. Mu, Y. Mu, Y. Mu, J. Liu, J. Liu, J. Liu   +26 more
doaj   +1 more source

Photochemical evolution of the 2013 California Rim Fire: synergistic impacts of reactive hydrocarbons and enhanced oxidants [PDF]

Atmospheric Chemistry and Physics, 2022
Large wildfires influence regional atmospheric composition, but chemical complexity challenges model predictions of downwind impacts. Here, we elucidate key connections within gas-phase photochemistry and assess novel chemical processes via a case study ...
G. M. Wolfe, T. F. Hanisco, H. L. Arkinson, D. R. Blake, A. Wisthaler, A. Wisthaler, T. Mikoviny, T. B. Ryerson, T. B. Ryerson, T. B. Ryerson, I. Pollack, I. Pollack, J. Peischl, P. O. Wennberg, P. O. Wennberg, J. D. Crounse, J. M. St. Clair, J. M. St. Clair, A. Teng, A. Teng, L. G. Huey, X. Liu, X. Liu, A. Fried, P. Weibring, D. Richter, J. Walega, S. R. Hall, K. Ullmann, J. L. Jimenez, J. L. Jimenez, P. Campuzano-Jost, P. Campuzano-Jost, T. P. Bui, G. Diskin, J. R. Podolske, G. Sachse, G. Sachse, R. C. Cohen, R. C. Cohen   +39 more
doaj   +1 more source

Characterization of Products from the Aqueous-Phase Photochemical Oxidation of Benzene-Diols

Atmosphere, 2021
Chemical processing in atmospheric aqueous phases, including cloud and fog drops, might be significant in reconciling the gap between observed and modeled secondary organic aerosol (SOA) properties.
Yang Ou, Dongyang Nie, Hui Chen, Zhaolian Ye, Xinlei Ge   +4 more
doaj   +1 more source

Relationship between Changes over Time in Factors, Including the Impact of Meteorology on Photochemical Oxidant Concentration and Causative Atmospheric Pollutants in Kawasaki

Atmosphere, 2021
To clarify the relationship between changes in photochemical oxidants’ (Ox) concentrations and their precursors in Kawasaki, a series of analyses were conducted using data on Ox, their precursors, nitrogen oxides (NOx) and volatile organic compounds ...
Akinori Fukunaga, Takaharu Sato, Kazuki Fujita, Daisuke Yamada, Shinya Ishida, Shinji Wakamatsu   +5 more
doaj   +1 more source

Is oxidation of atmospheric mercury controlled by different mechanisms in the polluted continental boundary layer vs. remote marine boundary layer?

Environmental Research Letters, 2020
Deposition of atmospheric mercury is of global concern, primarily due to health effects associated with efficient bioaccumulation of mercury in marine food webs.
Maor Gabay, Shira Raveh-Rubin, Mordechai Peleg, Erick Fredj, Eran Tas   +4 more
doaj   +1 more source

Severe level of photochemical oxidants (Ox) over the western coast of Japan during autumn after typhoon passing

Scientific Reports, 2023
Photochemical oxidants (Ox; mainly O3) are a concern in East Asia. Because of the prevailing westerly wind in the midlatitudes, O3 concentration generally shows a high in spring over Kyushu Island, western Japan, and Ox warnings have been issued in ...
Syuichi Itahashi
doaj   +1 more source