Results 41 to 50 of about 13,928 (154)

Caracterização de adubos orgânicos por espectroscopia de ressonância paramagnética eletrônica Characterization of organic fertilizers by electron paramagnetic resonance

Revista Brasileira de Ciência do Solo, 2007
O aumento do interesse na produção dos alimentos denominados orgânicos fez crescer a demanda por insumos com características adequadas para atender a esse sistema de produção.
Marcelo Luiz Simões, Wilson Tadeu Lopes da Silva, Sergio da Costa Saab, Larissa Macedo dos Santos, Ladislau Martin-Neto   +4 more
doaj   +1 more source

Mechanism of Antiradical Activity of Coumarin-Trihydroxybenzohydrazide Derivatives: A Comprehensive Kinetic DFT Study

Antioxidants
As part of this study, the mechanisms of the antioxidant activity of previously synthesized coumarin–trihydrobenzohydrazine derivatives were investigated: (E)-2,4-dioxo-3-(1-(2-(2″,3″,4″-trihydroxybenzoyl)hydrazineyl)ethylidene)chroman-7-yl acetate (1 ...
Žiko Milanović, Dušan Dimić, Edina H. Avdović, Dušica M. Simijonović, Đura Nakarada, Vladimir Jakovljević, Radiša Vojinović, Zoran S. Marković   +7 more
doaj   +1 more source

Applications of EPR methodology towards understanding Cr/PNP based ethylene tetramerisation

, 2019
"I would like to acknowledge Sasol UK Ltd. and St Leonard's postgraduate fellowship by the University of St Andrews for ...
openaire   +3 more sources

Methodology development of high sensitivity pulsed EPR and DNP

Dynamic nuclear polarisation (DNP) is a process that transfers electron spin polarisation to nuclei and is a technique that has been widely used to improve nuclear magnetic resonance (NMR) sensitivity. This thesis presents the implementation of a DNP extension to a home-built high power pulsed electron paramagnetic resonance (EPR) spectrometer, HiPER ...
openaire   +3 more sources

Distributions of molecular conformations and interactions revealed by EPR spectroscopy - methodology and application to hnRNPA1

, 2019
Proteins are long chains of peptide-bond linked amino acids, which have the fascinating ability to fold into a huge variety of three-dimensional shapes. To describe peptide sequences that have particularly large conformational flexibility, the umbrella terms intrinsically disordered domains (IDDs), resp. proteins (IDPs) have emerged.
openaire   +2 more sources

First Synthesis of C-Phenyl N-tert-Butyl [¹⁵N]nitrone (PBN-¹⁵N) for the EPR Spin Trapping Methodology

Zeitschrift für Naturforschung B, 1996
As compared to normal PBN, about fifty percent increase of electron paramagnetic resonance (EPR) spin trapping sensitivity has been gained by using a new 100% 15N-enriched spin trap, C-phenyl N-tert-butyl[15N]nitrone (PBN-15N). PBN-15N has been prepared by a convenient four-step route using ammonium-15N chloride as the starting material. This synthetic
openaire   +1 more source

Economocracy: Global Economic Governance

Economies
Economic systems face critical challenges, including widening income inequality, unemployment driven by automation, mounting public debt, and environmental degradation.
Constantinos Challoumis
doaj   +1 more source

Shoreline change detection along the eastern coast of Ghana: leveraging GIS and advanced remote sensing techniques

Scientific Reports
Recent advancements in automated shoreline detection methods have transformed the monitoring of Ghana’s coastline dynamics. This study measures the rates of shoreline change along Ghana’s eastern coastline using the USGS Digital Shoreline Analysis System
Baah Asare-Bediako, Faustina Awafu, Evans Y. Boakye, Emmanuel Boahen, Cyril D. Boateng, David D. Wemegah, Akyana Britwum, Michael K. E. Donkor, Jeffrey N. A. Aryee, Emmanuel K. Brempong, Leonard K. Amekudzi   +10 more
doaj   +1 more source

Modeling the influence of lime on the unconfined compressive strength of reconstituted graded soil using advanced machine learning approaches for subgrade and liner applications.

PLoS ONE
In the field of soil mechanics, especially in transportation and environmental geotechnics, the use of machine learning (ML) techniques has emerged as a powerful tool for predicting and understanding the compressive strength behavior of soils especially ...
Xinghuang Guo, Cesar Garcia, Alexis Ivan Andrade Valle, Kennedy Onyelowe, Andrea Natali Zarate Villacres, Ahmed M Ebid, Shadi Hanandeh   +6 more
doaj   +1 more source

Predictive modeling of wide-shallow RC beams shear strength considering stirrups effect using (FEM-ML) approach

Scientific Reports
This paper presents an analysis and prediction of the shear strength of wide-shallow reinforced concrete beams, utilizing Finite Element Analysis (FEA) and machine learning techniques.
Ahmed A. Soliman, Dina M. Mansour, Ayman H. Khalil, Ahmed Ebid   +3 more
doaj   +1 more source