Results 11 to 20 of about 279,186 (291)

Underrated primary biogenic origin and lifetime of atmospheric formic and acetic acid

Scientific Reports, 2021
Formic and acetic acids are ubiquitous in the troposphere, playing an important role in the atmospheric chemistry. Recent model studies ended up with substantial low bias on their tropospheric budgets presumably due to a large missing biogenic source ...
Xinqing Lee, Daikuan Huang, Qi Liu, Xueyan Liu, Hui Zhou, Qian Wang, Yuena Ma   +6 more
doaj   +1 more source

Petrology of some oceanic island basalts: PRIMELT2.XLS software for primary magma calculation [PDF]

, 2008
PRIMELT2.XLS software is introduced for calculating primary magma composition and mantle potential temperature (TP) from an observed lava composition. It is an upgrade over a previous version in that it includes garnet peridotite melting and it detects ...
Asimow, Paul D., Herzberg, C.
core   +2 more sources

The Forum of European Geological Surveys Geochemistry Task Group 1994-1996 inventory [PDF]

, 1997
The Forum of European Geological Surveys (FOREGS) includes representatives from 33 European countries and is responsible for co-ordinating Geological Survey activities in Europe.
Fordyce, F.M., Klaver, G., Locutura, J., Plant, J.A., Salminen, R., Vrana, K.   +5 more
core   +1 more source

Glass in the submarine section of the HSDP2 drill core, Hilo, Hawaii [PDF]

, 2004
The Hawaii Scientific Drilling Project recovered ~3 km of basalt by coring into the flank of Mauna Kea volcano at Hilo, Hawaii. Rocks recovered from deeper than ~1 km were deposited below sea level and contain considerable fresh glass. We report electron
Baker, Michael, Garcia, Michael, Seaman, Caroline, Sherman, Sarah, Stolper, Edward   +4 more
core   +1 more source

From Methane to Nanodiamond Precursors in Water: Superacid‐like Condensation Pathways Under Extreme Conditions

Angewandte Chemie, EarlyView.
Under extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thomas Thévenet, Axel Dian, Matteo Cioni, Alexis Markovits, Sandro Scandolo, Arthur France‐Lanord, Flavio Siro Brigiano   +6 more
wiley   +2 more sources

Composition and structure of natural organic matter through advanced nuclear magnetic resonance techniques

Chemical and Biological Technologies in Agriculture, 2017
Natural organic matter (NOM) plays important roles in biological, chemical, and physical processes within the terrestrial and aquatic ecosystem. Despite its importance, a clear and exhaustive knowledge on NOM chemistry still lacks.
Dainan Zhang, Dandan Duan, Youda Huang, Yu Yang, Yong Ran   +4 more
doaj   +1 more source

Concentration, source identification, and exposure risk assessment of PM2.5-bound parent PAHs and nitro-PAHs in atmosphere from typical Chinese cities

Scientific Reports, 2017
Sixteen parent PAHs and twelve nitro-PAHs were measured in PM2.5 samples collected over one year (2013–2014) at nine urban sites in China. During the sampling period, concentrations of individual nitro-PAHs were one or two orders of magnitude lower than ...
Di Liu, Tian Lin, Jabir Hussain Syed, Zhineng Cheng, Yue Xu, Kechang Li, Gan Zhang, Jun Li   +7 more
doaj   +1 more source

Mantle Hg isotopic heterogeneity and evidence of oceanic Hg recycling into the mantle

Nature Communications, 2022
This work demonstrates distinct mass-independent mercury isotope fractionation in global basalts, which suggests mantle Hg isotope heterogeneity and reveals large-scale translithospheric Hg recycling via plate tectonics.
Runsheng Yin, Di Chen, Xin Pan, Changzhou Deng, Liemeng Chen, Xieyan Song, Songyue Yu, Chuanwei Zhu, Xun Wei, Yue Xu, Xinbin Feng, Joel D. Blum, Bernd Lehmann   +12 more
doaj   +1 more source

Observations of atmospheric mercury in China: a critical review [PDF]

Atmospheric Chemistry and Physics, 2015
China presently contributes the largest amount of anthropogenic mercury (Hg) emission into the atmosphere in the world. Over the past decade, numerous studies have been conducted to characterize the concentration and forms of atmospheric Hg in China ...
X. W. Fu, H. Zhang, B. Yu, X. Wang, C.-J. Lin, X. B. Feng   +5 more
doaj   +1 more source

Interseismic strain accumulation: Spin-up, cycle invariance, and irregular rupture sequences [PDF]

, 2006
Using models of infinite length strike-slip faults in an elastic layer above linear viscoelastic regions, we investigate interseismic deformation. In the models we investigate, interseismic strain accumulation on mature faults is the result of the ...
Hager, B. H., Hetland, E. A.
core   +1 more source