Results 1 to 10 of about 16,231 (179)

Eperua oleifera Ducke (Fabaceae) Oilresin Chemical Composition and the Isolation of a Natural Diterpenic Acid Methyl Ester. [PDF]

Chem Biodivers
Eperua oleifera (Fabaceae) oilresin presents not only diterpenic acids, but also diterpenic acid methyl ester. ABSTRACT Eperua oleifera Ducke, commonly known as “copaíba‐jacaré,” produces oilresins traditionally used in folk medicine for wound healing and as antifungal and antibacterial agents, similar to those of Copaifera species.
Ribeiro R, Pereira HMG, Magalhães A, Hallwass F, Padilha MC, Veiga-Junior VF.   +5 more
europepmc   +2 more sources

Structural Revision of the C₁₆ Sesquiterpene Hegelenether and the Mechanism of C6-Methylation in Terpene Biosynthesis. [PDF]

Angew Chem Int Ed Engl
The structure of the non‐canonical C16 sesquiterpene named hegelenether was revised to the structure of marxdiol, and its absolute configuration was assigned. Isotopic labeling experiments revealed the stereochemical course of the methyltransferase involved in its biosynthesis.
Li H, Schnakenburg G, Groll M, Dickschat JS.   +3 more
europepmc   +2 more sources

Giant Isotope Effect in Metal-Organic Frameworks Boosts Unprecedented Photo- and Radio-Luminescence Enhancement. [PDF]

Adv Sci (Weinh)
Deuterated MOFs in this work exhibited unprecedented giant luminescence isotope effect via O─H oscillator suppression, achieving maximal solid‐state materials emission enhancement. This yields significantly improved X‐ray detection sensitivity and imaging resolution, marking the first integration of MOFs with isotopic luminescence and opening new ...
Lu J, Zhou D, Hao X, Lu H, Zhang Z, Jia Y, Mei S, Huang Y, Tang S, Peng Z, Chen L, Yuan M, Chen L, Wang S, Feng M, Wang Y, Wang S.   +16 more
europepmc   +2 more sources

Quantifying loopy network architectures [PDF]

, 2011
Biology presents many examples of planar distribution and structural networks having dense sets of closed loops. An archetype of this form of network organization is the vasculature of dicotyledonous leaves, which showcases a hierarchically-nested ...
A Barrat, A Perna, A Rinaldo, A Rinaldo, A Roth-Nebelsick, A Strahler, A Tero, AG Rolland-Lagan, B Blonder, B Ellis, E Katifori, Eleni Katifori, F Corson, F Corson, H Fujita, H Takayasu, J Kirchner, J Shao, J VanPelt, Jérémie Bourdon, K Paik, L da F Costa, M Sales-Pardo, Marcelo O. Magnasco, MEJ Newman, P Blinder, P Dimitrov, R Albert, R Horton, R Melville, S Boccaletti, WK Ang, Y Couder   +32 more
core   +5 more sources

On the study of catalytic membrane reactor for water detritiation: Membrane characterization. [PDF]

, 2013
Tritium waste recycling is a real economic and ecological issue. Generally under the non-valuable Q2Oform (Q = H, D or T), waste can be converted into fuel Q2for a fusion machine (e.g. JET, ITER) by isotopeexchange reaction Q2O + H2= H2O + Q2.
Joulia, Xavier, Liger, Karine, Mascarade, Jérémy, Meyer, Xuân-Mi, Perrais, Christophe, Tosti, Silvano, Troulay, Michèle   +6 more
core   +2 more sources

A taxonomic revision of Camptocerus Dejean (Coleoptera: Curculionidae: Scolytinae) [PDF]

, 2010
The Neotropical ambrosia beetle genus Camptocerus Dejean was revised. Monophyly of the genus was tested using 66 morphological characters in a cladistic analysis. Camptocerus was recovered as monophyletic and 31 species were recognized.
Cognato, Anthony I., Smith, Sarah M.
core   +2 more sources

High Rate Neutrino Detectors for Neutrino Factories [PDF]

, 2000
Three types of high rate neutrino detectors for neutrino interaction physics at neutrino factories are discussed. High performance general-purpose detectors might collect event samples on the order of a billion events or more.
Abe, Ashman, B.J. King, Crabb, Villain
core   +4 more sources

A high-pressure hydrogen time projection chamber for the MuCap experiment

, 2014
The MuCap experiment at the Paul Scherrer Institute performed a high-precision measurement of the rate of the basic electroweak process of nuclear muon capture by the proton, $\mu^- + p \rightarrow n + \nu_\mu$. The experimental approach was based on the
Andreev, V. A., Banks, T. I., Clayton, S. M., Egger, J., Fahrni, D., Ganzha, V. A., Gray, F. E., Hildebrandt, M., Hofer, A., Kammel, P., Kiburg, B., Kravtsov, P. A., Krivshich, A. G., Lauss, B., Maev, E. M., Maev, O. E., Meier, L., Petitjean, C., Petrov, G., Semenchuk, G. G., Vasilyev, A. A., Vorobyov, A. A., Vznuzdaev, M. E., Winter, P.   +23 more
core   +1 more source

Inference on the Nature and the Mass of Earth's Late Veneer from Noble Metals and Gases [PDF]

, 2001
Noble metals and gases are very sensitive to the late accretion to the Earth of asteroids and comets. We present mass balance arguments based on these elements that indicate that 0.7E22-2.7E22 kg of extraterrestrial bodies struck the Earth after core ...
Allègre, Alvarez, Anders, Anderson, Bar-Nun, Bar-Nun, Basaltic Volcanism Study Project, Bernard Marty, Chyba, Chyba, Chyba, Craig, Crisp, Crovisier, Dauphas, Dauphas, Dauphas, Dauphas, Deloule, Delsemme, Engrand, Feldman, Fernandez, Gaffey, Gradie, Grieve, Hildebrand, Hunten, Jagoutz, Jambon, Jessberger, Kawakita, Kerridge, Kimura, Klein, Kleine, Kokubu, Krasnopolsky, Kurat, Kyte, Lipschutz, Love, Maher, Marty, Marty, Marty, Matsuda, Mazor, McDonough, Meisel, Meisel, Michael, Mojzsis, Morbidelli, Moreira, Morgan, Mumma, Newman, Nicolas Dauphas, Owen, Owen, Ozima, Schlesinger, Schoenberg, Schopf, Shoemaker, Shoemaker, Sleep, Stern, Stern, Swindle, Swindle, Tackley, Tolstikhin, Trieloff, Valbracht, Walker, Wasson, Yamamoto, Yin, Zahnle, Zhao   +81 more
core   +2 more sources

New method for highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions

, 2015
New approach to highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions is developed. This effective, fast and numerically stable method is based on the use of the Rayleigh's formula for the spherical ...
Frolov, Alexei M.
core   +1 more source