Results 201 to 210 of about 24,237 (229)

Determining Chemical Activity of (Semi)volatile Compounds by Headspace Solid-Phase Microextraction

Analytical Chemistry, 2007
This research introduces a new analytical methodology for measuring chemical activity of nonpolar (semi)volatile organic compounds in different sample matrices using automated solid-phase microextraction (SPME). The chemical activity of an analyte is known to determine its equilibrium concentration in the SPME fiber coating.
Legind, C. N., Karlson, U., Burken, J. G., Reichenberg, F., Mayer, P.   +4 more
openaire   +3 more sources

Headspace solid-phase microextraction-gas chromatography–mass spectrometry characterization of propolis volatile compounds

Journal of Pharmaceutical and Biomedical Analysis, 2013
In this study, a novel and efficient method based on headspace solid-phase microextraction (HS-SPME), followed by gas chromatography-mass spectrometry (GC-MS), was developed for the analysis of propolis volatile compounds. The HS-SPME procedure, whose experimental parameters were properly optimized, was carried out using a 100 μm polydimethylsiloxane ...
PELLATI, Federica, PRENCIPE, FRANCESCO PIO, BENVENUTI, Stefania   +2 more
openaire   +3 more sources

HEADSPACE SOLID-PHASE MICROEXTRACTION OF RARE CORIANDRUM SATIVUM L. HONEY

2013
The chemical analysis of rare Coriandrum sativum L. honey sample from Poland reveals new data on low-molecular compounds that could be helpful for the honey botanical origin specification. The compounds responsible for highly individual aroma profile of Coriandrum sativum L.
Jerković, I., Obradović, M., Sarolić, M.   +2 more
openaire   +2 more sources

Determination of Essential Oils in Hops by Headspace Solid-Phase Microextraction

Journal of Agricultural and Food Chemistry, 1996
A solid-phase microextraction (SPME) method is described for the determination of the essential oils, humulene and caryophyllene, in the headspace of female hop cones and male hop lupulin samples. Optimized SPME sampling parameters for the determination of the humulene to caryophyllene (H/C) ratio for female hops (50 mg) and male lupulin (25 mg ...
Jennifer A. Field, Gail Nickerson, Derryl D. James, Chris Heider   +3 more
openaire   +1 more source

Headspace Analyses ofChrysanthemum indicumby Solid-Phase Microextraction

Analytical Chemistry Letters, 2011
Abstract Volatile flavor compositions of headspace from flowers and stems of Chrysanthemum indicum, which is a perennial aromatic and medicinal plant and belong to the family Compositae, were investigated through solid-phase microextraction method using polydimethylsiloxane-divinylbenzene fiber.
openaire   +1 more source

Circulating tumor DNA in advanced solid tumors: Clinical relevance and future directions

Ca-A Cancer Journal for Clinicians, 2021
Michael L Cheng, Glenn J Hanna, Heather A Parsons   +2 more
exaly  

Current and future cancer staging after neoadjuvant treatment for solid tumors

Ca-A Cancer Journal for Clinicians, 2021
James D Brierley Mb, Frcp, Daniel C Sullivan   +1 more
exaly  

Liquid-to-solid phase transition of oskar ribonucleoprotein granules is essential for their function in Drosophila embryonic development

Cell, 2022
Mainak Bose, Marko Lampe, Julia Mahamid
exaly  

Emerging Solid‐to‐Solid Phase‐Change Materials for Thermal‐Energy Harvesting, Storage, and Utilization

Advanced Materials, 2022
Feng Xiong, Waseem Aftab, Ruqiang Zou
exaly  

Fundamentals and application of solid-state phase transformations for advanced high strength steels containing metastable retained austenite

Materials Science and Engineering Reports, 2021
Zongbiao Dai, Hao Chen, Ran Ding
exaly