Results 71 to 80 of about 70,371 (306)
Analytical Chemistry, 2016 A low-cost, simple, and highly selective analytical method was developed for sensitive visual detection of selenium in human urine both outdoors and at home, by coupling hydride generation with headspace solid-phase extraction using quantum dots (QDs ...
Ke-Jing Huang +5 more
semanticscholar +1 more source
Advanced Science, EarlyView.Here, we designed the Me‐FBSe molecule and prepared a two‐dimensional molecular crystal via liquid‐liquid interface assembly. The crystal preserves the high photoluminescence quantum while simultaneously ensuring the high‐density surface exposure of active sites.
Shuya Liu +6 more
wiley +1 more source
Applied SciencesTerpenes and terpenoids content in cannabis plant was already studied in the past with three used methods. Since these works did not compare the content of these substances under the same conditions, we tried to make this comparison exactly.
Lumír Ondřej Hanuš
doaj +1 more source
Kinetics of Gas Escape from Carbonated Beverages
Kvasný průmysl, 2015 The article deals with the kinetics of the pressure growth in the headspace of the bottle filled by carbonated beverage after the rapid opening and closing of the output valve placed on the bottle neck.
Jan Šavel, Petr Košin, Adam Brož
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Streamlined V3.5+ Electrolyte Production by Leveraging Chemical and Catalytic Reductions
Advanced Energy Materials, EarlyView.A tuned catalytic process for V3.5+ electrolyte production is shown to streamline the conventional chemical‐to‐catalytic sequence by extending catalysis into the rate‐determining reduction regime. This study shows that initiating catalysis in this regime shortens the overall production time by 67% based on rigorous thermodynamic and kinetic analysis of
Kyunghwa Seok +2 more
wiley +1 more source
Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum, 2009 Background and Objectives: Analytical methods for volatile organic compounds (VOCs) in different samples need extraction of compounds, by applying hazardous solvents. Solid phase micro-extraction (SPME) is a solvent-free equilibrium extraction method, in
HR Heidari +4 more
doaj
In search of a new attractant for monitoring Stegobium paniceum L. (Coleoptera: Anobiidae)
Julius-Kühn-Archiv, 2018 Stegobium paniceum (L.) is a major pest for several stored products worldwide. Monitoring methods for this species, based on pheromone traps, are affected by the complexity and expensiveness of the chemical synthesis of the pheromone isomer [(2S,3R,1’R ...
Guarino, Salvatore +7 more
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Agronomy, 2020 Medicinal and aromatic plants have the ability to transmit volatile allelochemicals and affect their surrounding organisms. In this regard, their interaction should also be considered.
Somayeh Mirmostafaee +2 more
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Quantitative Endogenous Formate Analysis in Plasma Using Headspace Gas Chromatography Without a Headspace Analyzer [PDF]
Journal of Analytical Toxicology, 2007 The objective was to develop a simple routine method for quantitative measurement of endogenous formic acid in plasma and whole blood using headspace gas chromatography-flame ionization detection. (GC-FID). Two-hundred microliters of sample was placed in a 1-mL glass vial. Fifty microliters of aqueous ethanol (10%) was added as an internal standard and
AbdulRazaq, Sokoro +3 more
openaire +2 more sources
Headspace Constituents of Shellac
Zeitschrift für Naturforschung B, 1993 Abstract By headspace analysis of the CO 2 -extract of shellac 4-methyl-3-penten-2-one (29.57%), 4-hydroxy-4-methyl-2-pentanone (16.66%) and 3-methyl-1-butanol (15.41%) could be identified as main constituents, as well as nearly forty hitherto unknown minor constituents ...
Gerhard Buchbauer +3 more
openaire +1 more source