Results 1 to 10 of about 9,928 (177)

CONSTITUÍNTES QUÍMICOS DE Protium paniculatum(BURSERACEAE) [PDF]

Acta Amazonica, 1994
Dos extratos etéreo e etanólico da casca da madeira de Protium paniculatumEngl. foram isolados α- e β-amirina (0,012%), β-sitosterol e estigmasterol (0,003%) e o ácido 3,3'-di-O-metilelágico (0,093%0).
Maria das G. B. ZOGHBI, Jane B. G. SIQUEIRA, Esther L. A. WOLTER, Orlando L.P. Júnior   +3 more
doaj   +3 more sources

Novel Calibration Approach for Monitoring Aerosol Hydrogen Isotopes Using Laser-Induced Breakdown Spectroscopy for Molten Salt Reactor Off-Gas Streams [PDF]

Sensors, 2023
Online monitoring is a key challenge for the continued development of molten salt reactor (MSR) technology. Laser-induced breakdown spectroscopy (LIBS) has previously been demonstrated to be a viable tool for monitoring aerosolized species and noble ...
Hunter B. Andrews, Joanna McFarlane
doaj   +2 more sources

Gram-Scale Synthesis of Perdeuterated Paracetamol. [PDF]

J Labelled Comp Radiopharm
We report the synthesis of perdeuterated paracetamol on a multigram scale with an average deuterium incorporation of > 93% and no less than 78% at any individual position. ABSTRACT The synthesis of deuterated compounds is a major stumbling block in the field of neutron total scattering on disordered materials.
Park A, Edkins RM, McCorquodale J, Tellam J, Youngs S, Edkins K.   +5 more
europepmc   +2 more sources

Improving polarized neutron reflectometry experiments on soft-matter samples: optimization of the solid substrate structure. [PDF]

J Appl Crystallogr
We demonstrate a Fisher‐information‐based strategy for optimizing the solid substrate structure in polarized neutron reflectometry experiments on soft‐matter samples. The approach identifies magnetic reference layer designs that improve experimentally accessible information and provides a general framework for more efficient reflectometry experiment ...
Yakimenko IP, Luchini A, Cooper JFK, Köhler S, Nylander T, Langridge S, Kinane CJ, Caruana AJ, Hjörvarsson B, Wolff M, Vorobiev A, Valyukh S, Eriksson F, Birch J, Järrendahl K.   +14 more
europepmc   +2 more sources

Description of the rate-limiting hydrogen tunneling mechanism for plant 9- and 13-lipoxygenases. [PDF]

Protein Sci
Abstract Soybean lipoxygenase (GmLOX1), a plant 13‐LOX, has long been considered a model protein for non‐trivial, quantum hydrogen tunneling in enzyme catalysis. Hydrogen tunneling mechanisms have also been confirmed for LOXs across mammalian, fungal, and bacterial kingdoms.
Kockler A, Ray K, King J, Anderson E, Walker J, Gilbert N, Horn P, Offenbacher AR.   +7 more
europepmc   +2 more sources

Characterization, antimicrobial and antitumor activity of superoxide dismutase extracted from Egyptian honeybee venom (Apis mellifera lamarckii)

Journal of Genetic Engineering and Biotechnology, 2023
Background Superoxide dismutase is an important antioxidative stress enzyme which is found in honeybee venom and has a wide pharmaceutical and medical applications.
Mohamed M. Abdel-Monsef, Doaa A. Darwish, Hind A. Zidan, Ahmed A. Hamed, Mahmoud A. Ibrahim   +4 more
doaj   +1 more source

Exploring the links between secondary metabolites and leaf spectral reflectance in a diverse genus of Amazonian trees

Ecosphere, 2021
Plant defense chemistry is often hypothesized to drive ecological and evolutionary success in diverse tropical forests, yet detailed characterizations of plant secondary metabolites in tropical plants are logistically challenging.
Paul V. A. Fine, Diego Salazar, Roberta E. Martin, Margaret R. Metz, Tracy M. Misiewicz, Gregory P. Asner   +5 more
doaj   +1 more source

New state record of Lopesia similis Maia (Insecta, Diptera, Cecidomyiidae) [PDF]

Check List, 2014
Lopesia similis Maia, 2004 (Insecta, Diptera, Cecidomyiidae) is recorded for the first time in the state of Mato Grosso do Sul. This species induces leaf galls on Protium heptaphyllum March (Burseraceae).
Sharlene da Silva, Valéria Maia
doaj   +3 more sources