Results 51 to 60 of about 469,255 (262)

Recent developments in the rapid analysis of plants and tracking their bioactive constituents [PDF]

, 2009
Natural products chemistry has witnessed many new developments in the last 5 years like extractions with subcritical water and ionic liquids, LC/HRMS and LC/SPE/cryo-NMR, UHPLC, TLC/MS, MS-based preparative HPLC, comprehensive chromatography (GC × GC, LC
Beek, T.A., van, Claassen, F.W., Dapkevicius, A., Exarchou, V., Jeurissen, S.M.F., Klift, E.J.C., van der, Koleva, I., Tetala, K.K.R.   +7 more
core   +2 more sources

Exploiting the Functionality of Cerium Oxide‐Modified Carbon Nanohorns Catalysts Toward Enhanced CO2 Reduction Performance

Advanced Functional Materials, EarlyView.
A cerium oxide‐carbon nanohybrid catalyst is synthesized via two distinct routes and is integrated into H‐type cells and gas diffusion layers (GDLs) to enhance electrochemical performance. Structural variations significantly affect performance, with the solvothermal sample exhibiting higher current densities.
Alessia Pollice, Michele Cacioppo, Miriam Marchi, Miriam Moro, Francesco Paolucci, Marcella Bonchio, Maurizio Prato, Giovanni Valenti, Michele Melchionna, Paolo Fornasiero   +9 more
wiley   +1 more source

Quantitative determination of methanol and propanol-2 in tinctures and extracts using head-space gas chromatography in comparison with method of vaporization of liquid in GC inlet

Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2018
The aim of this work was to compare sensitivity of methods for determination of methanol and propanol-2 contents in tinctures and extracts. Materials and methods.
T. V. Panasenko, L. O. Omelianchyk, N. V. Kandybei, A. I. Yaroshenko   +3 more
doaj   +1 more source

Analytical methods in wineries: is it time to change? [PDF]

, 2005
A review of the methods for the most common parameters determined in wine—namely, ethanol, sulfur dioxide, reducing sugars, polyphenols, organic acids, total and volatile acidity, iron, soluble solids, pH, and color—reported in the last 10 years is ...
Andersen S. K., Anon, Arnes S., Belton P. S., Bi L. J., Billingsley A., Cardwell T. J., Cardwell T. J., Chen S. G., Chmilenko F. A., Cserhati T., Dai G. S., Dell´Oro V., Edberg U., Escobal A., Fang G. Z., Feng Z., Ga R. D., Gao Z. F., González-Rodríguez J., Guan J. R., Hu J. Y., J. González-Rodríguez, Kaufmann A., Kawamura Y., Kosir I. J., Kupina S. A., Lodi G., Luo H. Q., M. D. Luque de Castro, Mannino S., Miao J. G., Mou S., Olalla M., P. Pérez-Juan, Patz C. D., Polo M. C., Rapp A., Ribereau-Gayon J., Scollary G. R., Sebecic B., Vereda-Alonso E., Wang J. H., Wang J. S., Wang X. H., Wu X., Wu X. L., Yan J., Yu H., Zhang W., Zhang W., Zhou H.   +51 more
core   +1 more source

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source

Bile salts of frogs: a new higher bile acid, 3 alpha, 7 alpha, 12 alpha, 26-tetrahydroxy-5 beta-cholestanoic acid from the bile Rana plancyi.

Journal of Lipid Research, 1980
Bile salts of ten species of frogs of the family Ranidae were examined by means of thin-layer chromatography, gas-liquid chromatography, and gas-liquid chromatography-mass spectrometry. Their major bile alcohols were ranol, cyprinol, or bufol.
M Une, N Matsumoto, K Kihira, M Yasuhara, T Kuramoto, T Hoshita   +5 more
doaj   +1 more source

Mobile Image Ratiometry: A New Method for Instantaneous Analysis of Rapid Test Strips [PDF]

, 2012
Here we describe Mobile Image Ratiometry (MIR), a new method for the automated quantification of standardized rapid immunoassay strips using consumer-based mobile smartphone and tablet cameras.
Bryan Callahan, Donald C. Cooper, Lee Burnett, Phil Callahan   +3 more
core   +2 more sources

Mechanochemistry‐Assisted Solvent‐Free Supramolecular Engineering for Atomic‐Layered Carbon Nitride Nanosheets with Enhanced Photocatalytic Hydrogen Evolution

Advanced Functional Materials, EarlyView.
A solvent‐free mechanochemistry‐enabled supramolecular engineering strategy is developed to directly synthesize covalent‐interconnected two‐dimensional atomic‐layered carbon nitride nanosheets photocatalyst, bypassing conventional top‐down exfoliation requirements.
Fanglei Yao, Jingwen Sun, Huiru Duan, Yongsheng Fu, Jin Wang, Liming Dai, Jingsan Xu, Junwu Zhu   +7 more
wiley   +1 more source

Quantitative Analysis of Fatty Acids by Gas-Liquid Chromatography

Journal of Lipid Research, 1964
The fatty acid methyl ester mixtures obtainable from the National Heart Institute, Bethesda, Md., U.S.A., as reference standards for gas-liquid chromatography (GLC) have been examined in a number of laboratories.
E.C. Horning, E.H. Ahrens, Jr., S.R. Lipsky, F.H. Mattson, J.F. Mead, D.A. Turner, W.H. Goldwater   +6 more
doaj   +1 more source

Mathematical Development Program for Calculation of Fatty Acid Composition Blend of Vegetable Oils [PDF]

, 2016
The method of solution of the problem of polyunsaturated fatty acids (PUFA) lack in milk products is offered in the work. It is offered to create the milk-containing products (sour cream product) with adjusted fatty acid composition.
Belemets, T. (Tatiana), Lobok, A. (Alexei), Polonskaya, T. (Tatiana), Radzievskaya, I. (Irina), Yushchenko, N. (Natalia)   +4 more
core   +2 more sources