Results 51 to 60 of about 339,529 (309)

Fractionation of Biomolecules in Withania coagulans Extract for Bioreductive Nanoparticle Synthesis, Antifungal and Biofilm Activity

Molecules, 2020
Withania coagulans contains a complex mixture of various bioactive compounds. In order to reduce the complexity of the plant extract to purify its phytochemical biomolecules, a novel fractionation strategy using different solvent combination ratios was ...
Murtaza Hasan, Ayesha Zafar, Irum Shahzadi, Fan Luo, Shahbaz Gul Hassan, Tuba Tariq, Sadaf Zehra, Tauseef Munawar, Faisal Iqbal, Xugang Shu   +9 more
doaj   +1 more source

Nitrogen cycling in sediments on the NW African margin inferred from N and O isotopes in benthic chambers

Frontiers in Marine Science, 2022
Benthic nitrogen cycling in the Mauritanian upwelling region (NW Africa) was studied in June 2014 from the shelf to the upper slope where minimum bottom water O2 concentrations of 25 µM were recorded.
Andrew W. Dale, David Clemens, Kirstin Dähnke, Frederike Korth, Scott D. Wankel, Ulrike Schroller-Lomnitz, Klaus Wallmann, Stefan Sommer   +7 more
doaj   +1 more source

Isotope fractionation during the synthesis of MDMA.HCl from helional

, 2022
An investigation into isotopic fractionation during the production of 3,4-methylenedioxymethylamphetamine (MDMA) from the novel precursor helional, and during the hydrochloric (HCl) salt precipitation of MDMA was conducted.
Cresswell, Sarah L, Carter, James F, Cormick, Justin, Currie, Timothy, Matheson, Carney   +4 more
core   +1 more source

FRACTIONAL SUPERSYMMETRY [PDF]

Modern Physics Letters A, 1995
A symmetry between bosonic coordinates and some Grassmannian-type coordinates is presented. Commuting two of these Grassmannian-type variables results in an arbitrary phase factor (not just a minus sign). This symmetry is also realized at the level of the field theory.
openaire   +2 more sources

Copper isotope evidence for large-scale sulphide fractionation during Earth’s differentiation [PDF]

, 2015
The differentiation of Earth into a metallic core and silicate mantle left its signature on the chemical and isotopic composition of the bulk silicate Earth (BSE).
Savage, P.S., Siebert, J., Badro, J., Moynier, F., Puchtel, I.S., Chen, H., Savage, Paul S., Shofner, G.   +7 more
core   +1 more source

One- vs. Three-Fraction Pancreatic Stereotactic Body Radiation Therapy for Pancreatic Carcinoma: Single Institution Retrospective Review

Frontiers in Oncology, 2017
Background/introductionEarly reports of stereotactic body radiation therapy (SBRT) for pancreatic ductal adenocarcinoma (PDAC) used single fraction, but eventually shifted to multifraction regimens.
Philip Anthony Sutera, Mark E. Bernard, Beant S. Gill, Kamran K. Harper, Kimmen Quan, Nathan Bahary, Steven A. Burton, Herbert Zeh, Dwight E. Heron   +8 more
doaj   +1 more source

Experimental constraints on kinetic and equilibrium silicon isotope fractionation during the formation of non-biogenic chert deposits [PDF]

, 2015
Silicon isotopic compositions (δ30Si) of modern and ancient siliceous sedimentary rocks provide valuable information on conditions in depositional environments, but interpretations are hampered by the lack of experimentally validated fractionation ...
van Bergen, Manfred J., Vroon, Pieter Z., Petrology, Geilert, Sonja, van den Boorn, Sander H.J.M., Roerdink, Desiree L., van den Boorn, Sander H J M, NWO-ALW Open: Exploring the Earth's earliest oceans with silicon: magnitudes of isotopic fractionation, NWO-NSO: Testing the robustness of the sulfur stable isotope biomarker and paleoredox indicator for planetary exploration   +8 more
core   +2 more sources

Simultaneous fractionation of sulfur dioxide explains mass independent fractionation of sulfur isotopes in Archean sedimentary pyrites

, 2021
The relationship between ∆36S and ∆33S in Archean sedimentary pyrites has been used to evaluate early geologic processes, including photochemical reactions in the anoxic atmosphere, biological activity and thermochemical alteration during sediment ...
Chen, M, Campbell, IH, Huang, Z, Sambridge, M, Avila, JN   +4 more
core   +1 more source

Probing stratospheric transport and chemistry with new balloon and aircraft observations of the meridional and vertical N2O isotope distribution [PDF]

, 2006
A comprehensive set of stratospheric balloon and aircraft samples was analyzed for the position-dependent isotopic composition of nitrous oxide (N2O). Results for a total of 220 samples from between 1987 and 2003 are presented, nearly tripling the number
Kaiser, Jan, Engel, A., Röckmann, Thomas, Borchers, Reinhard, Kaiser, J., Borchers, R., Röckmann, T., Engel, Andreas, J. Kaiser, A. Engel, T. Röckmann, R. Borchers   +11 more
core   +2 more sources

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source