Results 41 to 50 of about 9,679,616 (302)

1,2-3H-Cholesterol as a tracer in studies of human cholesterol metabolism

Journal of Lipid Research, 1967
1,2-3H-Cholesterol was fed to a subject together with 4-14C-cholesterol at a known 3H/14C ratio. The ratio was satisfactorily preserved in cholesterol recovered from plasma, red cells, and bile, and in bile acids of bile.Isotopic fractionation was seen ...
Peter D.S. Wood, Daphne Myers, Yuen-Ling Lee, Ryuzo Shioda, Laurance W. Kinsell   +4 more
doaj   +1 more source

A consistent molecular hydrogen isotope chemistry scheme based on an independent bond approximation [PDF]

, 2009
The isotopic composition of molecular hydrogen (H₂) produced by photochemical oxidation of methane (CH₄) and Volatile Organic Compounds (VOCs) is a key quantity in the global isotope budget of (H<sub>2 ...
Sub Atmospheric physics and chemistry, M. C. Krol, G. Pieterse, T. Röckmann, Krol, M.C., Pieterse, G., Afd Marine and Atmospheric Research, Marine and Atmospheric Research, Röckmann, T.   +8 more
core   +3 more sources

Modeling the signature of sulfur mass-independent fractionation produced in the Archean atmosphere [PDF]

, 2014
Minor sulfur isotope anomalies indicate the absence of O2 from the Archean atmosphere. A rich dataset showing large variations in magnitude and sign of Δ33S and Δ36S, preserved in both sulfates and sulfides, suggests that further constraints on Archean ...
Claire, Mark, Meadows, Victoria, Domagal-Goldman, Shawn D., Stueken, Eva, Claire, Mark W., Domagal-Goldman, Shawn, Kasting, James F., Stüeken, Eva E., Meadows, Victoria S., Kasting, James, Buick, Roger   +10 more
core   +1 more source

Experimental study and gyrokinetic simulations of isotope effects on core heat transport in JET tokamak deuterium and tritium plasmas

Nuclear Fusion
This paper presents a study on the dependence of the ion temperature stiffness on the plasma main ion isotope mass in JET ITER-like wall and C wall discharges.
D. Brioschi, P. Mantica, A. Mariani, N. Bonanomi, E. Delabie, J. Garcia, N. Hawkes, I. Jepu, D. Keeling, E. Lerche, E. Litherland-Smith, C.F. Maggi, S. Menmuir, G. Szepesi, D. Taylor, D. Van Eester, JET Contributors   +16 more
doaj   +1 more source

The influence of deuterium‑depleted water Larsen D100 on seed germination parameters in cereal, oilseed, and legume crops

Siberian Journal of Life Sciences and Agriculture
Background.  The study aimed to investigate the species-specific effects of deuterium-depleted water (Larsen D100,
Denis A. Kozyrev, Andrey G. Polyakov, Mary Yu. Odabashyan, Anastasiya V. Olshevskaya, Arina A. Eroshenko, Dmitry N. Savenkov, Natalia A. Kulikova   +6 more
doaj   +1 more source

Deuterated Arachidonic Acids Library for Regulation of Inflammation and Controlled Synthesis of Eicosanoids: An In Vitro Study

Molecules, 2018
The synthesis of signal lipids, including eicosanoids, is not fully understood, although it is key to the modulation of various inflammatory states.
Dmitry V. Chistyakov, Ivan S. Filimonov, Nadezhda V. Azbukina, Sergei V. Goriainov, Viktor V. Chistyakov, Maksim A. Fomich, Andrei V. Bekish, Vadim V. Shmanai, Marina G. Sergeeva, Mikhail S. Shchepinov   +9 more
doaj   +1 more source

Isotope effect on the Casimir force

Science China Physics, Mechanics & Astronomy, 2023
Isotopic dependence of the Casimir force is key to probing new physics and pushing novel technologies at the micro and nanoscale, but is largely unexplored. In 2002, an isotope effect of 10^(-4) was estimated for metals -- orders of magnitude beyond the experimental resolution.
Xie, Lanyi, Yang, Fuwei, Song, Bai
openaire   +2 more sources

Emerging experimental and computational methods for studying redox‐regulated structural transitions

FEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass, Dana Reichmann, Gábor Erdős   +2 more
wiley   +1 more source

Oxygen isotope ecology of recent planktic foraminifera at the central Walvis Ridge (SE Atlantic) [PDF]

, 2005
Above the Walvis Ridge, in the SE Atlantic Ocean, we collected living plantkic foraminifera from the upper water column using depth stratified plantkon tows. The oxygen isotope composition (
Kroon, Dirk, Dick Kroon, Brummer, G.J.A., Neven Lončarić, Brummer, G. J. A., Kroon, D., Peeters, F. J. C., Peeters, F.J.C., Geert‐Jan A. Brummer, Loncaric, N., Frank J. C. Peeters   +10 more
core   +2 more sources

Isotope effect suggests site‐specific nonadiabaticity on Ge(111)c(2×8)

Natural Sciences
Energy transferred in atom‐surface collisions typically depends strongly on projectile mass, an effect that can be experimentally detected by isotopic substitution.
Kerstin Krüger, Yingqi Wang, Lingjun Zhu, Bin Jiang, Hua Guo, Alec M. Wodtke, Oliver Bünermann   +6 more
doaj   +1 more source