Results 41 to 50 of about 608,326 (393)

Preparation and Characterization of Protocatechuic Acid Sulfates

Molecules, 2019
Protocatechuic acid (3,4-dihydroxybenzoic acid; PCA) is a phenolic acid present in plants as a secondary metabolite and is also produced in the human organism as a metabolite from the degradation of polyphenols by the intestinal microbiota, particularly ...
Sofia M. Gutierrez-Zetina, Susana Gonzalez-Manzano, Jose J. Perez-Alonso, Ana M. Gonzalez-Paramas, Celestino Santos-Buelga   +4 more
doaj   +1 more source

Optimizing the Sulfates Content of Cement Using Neural Networks and Uncertainty Analysis

ChemEngineering, 2023
This study aims to approximate the optimum sulfate content of cement, applying maximization of compressive strength as a criterion for cement produced in industrial mills.
Dimitris C. Tsamatsoulis, Christos A. Korologos, Dimitris V. Tsiftsoglou   +2 more
doaj   +1 more source

Sulfur analysis of Bolu-Mengen lignite before and after microbiological treatment using reductive pyrolysis and gas chromatography/mass spectrometry [PDF]

, 2005
Atmospheric pressure-temperature programmed reduction coupled with on-line mass spectrometry (AP-TPR/MS) is used for the first time on microbiologically treated coal samples as a technique to monitor the degree of desulfurization of the various sulfur ...
Bozdemir T., Brown S. D., Durusoy T., Durusoy T., Gryglewicz G., J. Yperman, Jagtoyen M., Juszczak A., Karavaiko G. I., Klein J., Maes I. I., Maes I. I., Maes I. I., Mullens S., Olson G., Olsson G., R. Carleer, Rutkowski P., S. Mullens, Selsbo S., Stefanova M., T. Bozdemir, T. Durusoy, Van Aelst J., Van Aelst J., Y. Yürüm, Yperman J., Álvarez R.   +27 more
core   +1 more source

Ageing affects chondroitin sulfates and their synthetic enzymes in the intervertebral disc

Signal Transduction and Targeted Therapy, 2017
The depletion of chondroitin sulfates (CSs) within the intervertebral disc (IVD) during degenerative disc disease (DDD) results in a decrease in tissue hydration, a loss of fluid movement, cell apoptosis, a loss of nerve growth inhibition and ultimately,
E. Collin, Oliver Carroll, M. Kilcoyne, M. Peroglio, E. See, D. Hendig, M. Alini, S. Grad, A. Pandit   +8 more
semanticscholar   +1 more source

Recombination Luminescence and Electron–Hole Trapping Centers in BaSO₄-Bi Phosphor

Crystals
This study of the BaSO4-Bi phosphor has revealed that the accumulated energy after external optical excitation exhibits specific characteristics. During irradiation with photon energy exceeding the bandgap, in addition to the intrinsic ultraviolet ...
Sapargali Pazylbek, Turlybek N. Nurakhmetov, Aibek S. Nurpeissov, Temirulan T. Alibay, Batsay M. Sadykova, Raushan K. Shamiyeva, Aleksej Zarkov, Aivaras Kareiva   +7 more
doaj   +1 more source

Tris(4-hydroxypyridinium) hydrogen sulfate–sulfate monohydrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2009
En la estructura cristalina de la sal del título, 3C(5)H(6)NO (+) · HSO(4) (-) · SO (4) (2-) · H(2)O, el ion de sulfato de hidrógeno está unido al ion de sulfato por un enlace de hidrógeno O-H O. El anión sulfato de hidrógeno-sulfato es un aceptor de enlaces de hidrógeno para los tres cationes independientes y el mol-ecule de agua no coordinado, las ...
Yingming Xu, Shan Gao, Seik Weng Ng
openaire   +2 more sources

Enzyme-Assisted Extraction of Bioactive Material from Chondrus crispus and Codium fragile and Its Effect on Herpes simplex Virus (HSV-1)

Marine Drugs, 2015
Codium fragile and Chondrus crispus are, respectively, green and red seaweeds which are abundant along the North Atlantic coasts. We investigated the chemical composition and antiviral activity of enzymatic extracts of C. fragile (CF) and C. crispus (CC).
Garima Kulshreshtha, Anne-Sophie Burlot, Christel Marty, Alan Critchley, Jeff Hafting, Gilles Bedoux, Nathalie Bourgougnon, Balakrishnan Prithiviraj   +7 more
doaj   +1 more source

Vibrational spectra of hexaaquacomplexes. XII. On the possible anion disorder in selenate alums: prediction of the crystal structure and vibrational spectra of KAl(SeO4)2·12H2O and related alums

Macedonian Journal of Chemistry and Chemical Engineering, 2015
A survey is given for the crystallographic and vibrational spectroscopic results of a number of alums. From both types of results (structural and spectroscopic) it is positively known that the sulfate α-alums exhibit orientational disorder of the sulfate
Vladimir M. Petruševski
doaj   +1 more source

Chemical composition of ambient aerosol, ice residues and cloud droplet residues in mixed-phase clouds: single particle analysis during the Cloud and Aerosol Characterization Experiment (CLACE 6) [PDF]

, 2009
Two different single particle mass spectrometers were operated in parallel at the Swiss High Alpine Research Station Jungfraujoch (JFJ, 3580 m a.s.l.) during the Cloud and Aerosol Characterization Experiment (CLACE 6) in February and March 2007.
Borrmann, Stephan, Curtius, Joachim, Cziczo, Daniel J., Drewnick, Frank, Ettner-Mahl, Matthias, Kamphus, Michael, Keller, Livia, Klimach, Thomas, Mertes, Stephan   +8 more
core   +3 more sources

Mechanisms formation of electron-hole trap centers in LiKSO4 crystall

Eurasian Journal of Physics and Functional Materials, 2021
The mechanisms of creation of electron-hole trapping centers in LiKSO4 have been investigated by the methods of vacuum and thermal activation spectroscopy.
T.N. Nurakhmetov, Zh.M. Salikhodzha, A.M. Zhunusbekov, A.Zh. Kainarbay, D.H. Daurenbekov, T.T. Alibay, B.M. Sadykova, K.B. Zhangylyssov, B.N. Yussupbekova, D.A. Tolekov   +9 more
doaj   +1 more source