Results 41 to 50 of about 9,222 (182)

Volatiles from Flowers: Comparative Analysis by Simultaneous Distillation-Extraction and Solid Phase Microextraction

Natural Product Communications, 2012
The composition of the volatile compounds isolated by simultaneous distillation-extraction (SDE) and headspace-solid phase microextraction (SPME) from flowers of Magnolia grandiflora growing in Cuba was investigated by GC/FID and GC/MS.
Disnelys Báez, Jorge A. Pino, Diego Morales   +2 more
doaj   +1 more source

Analysis of Cannabis Material by Headspace Solid-Phase Microextraction Combined with Gas Chromatography-Mass Spectrometry

CHIMIA, 2004
A headspace solid-phase microextraction method combined with gas chromatography/mass spectrometry was developed for the direct analysis of cannabis samples.
Yara Ilias, Serge Rudaz, Patrick Mathieu, Jean-Luc Veuthey, Philippe Christen   +4 more
doaj   +1 more source

Two Metschnikowia nectar yeast species have similar volatile profiles but elicit differential foraging in bee pollinators

Ecological Entomology, EarlyView.
Yeasts that specialize in flower nectar play an important role in pollination ecology. Metschnikowia reukaufii and Metschnikowia koreensis were the most prevalent nectar yeasts found in our field sites. Bee pollinators exhibited different behavioural responses to nectar yeasts in field experiments. Bees visited more flowers with M.
M. Elizabeth Moore, Lindsey Wilson, Nathan Brandt, Ayako Wada‐Katsumata, Ahmed M. Saveer, Coby Schal, Robert R. Dunn, Rebecca E. Irwin, Caiti Smukowski Heil   +8 more
wiley   +1 more source

Development of a Novel Ultrasound Vacuum -Assisted Headspace Solid Phase Microextraction Approach for Determination of Solvent Residual's in Pharmaceuticals and Comparison with Traditional Headspace Solid Phase Microextraction Method

, 2023
Abstract In this report, an ultrasonication and vacuum assisted headspace solid-phase microextraction procedure followed by gas chromatography-flame ionization detection (UVA-HS-SPME-GC-FID) was proposed for direct extraction of solvent residuals, including benzene, toluene, ethyl benzene, m,p-xylene and o-xylene, in pharmaceutical matrices.
Somayeh Hajipour, Alireza Ghiasvand
openaire   +1 more source

Do aphid endosymbiotic bacteria influence parasitoid searching behaviour through changes in aphid honeydew production?

Ecological Entomology, EarlyView.
Hamiltonella defensa infection increases honeydew production in certain aphid genotypes, potentially modifying aphid feeding behaviour. Parasitoid wasps, Aphidius ervi, are more attracted to honeydew from H. defensa‐infected aphids; though larger honeydew amounts may slightly deter searching.
Desiré Macheda, Alexandre Foito, Katharine F. Preedy, Colin J. Alexander, Ankush Prashar, Alison J. Karley   +5 more
wiley   +1 more source

Thermogenesis‐derived spatiotemporal microclimates guide pollinator movement to ensure pollination

Journal of Integrative Plant Biology, EarlyView.
Alocasia odora's microclimatic heterogeneity guides Colocasiomyia fly movement within its inflorescence. During the female stage, midday heat in the upper spadix pushes flies down to the cooler female zone. During the male stage, nocturnal warmth in the upper part pulls flies upward and spathe constriction closes the lower female chamber.
Yuanjun Yu, Yan Luo, Wufan Zhang, Xiang Ding, Xiqiang Song, Yibo Luo   +5 more
wiley   +1 more source

A Preliminary Investigation into the Influence of Low-Intensity Natural Mid-Infrared and Far-Infrared/Near-Microwave Emissions on the Aroma and Flavor of a Young Dry Red Wine

ChemEngineering
Brief treatment of a bottled young dry red wine with low-intensity natural emissions in the mid-infrared and far-infrared/near-microwave regions of the electromagnetic spectrum resulted in moderate changes in the concentrations of certain odorants in the
Sanghoon Lee, Changgook Lee, Hyunhee Jeong, Sejun Kim, Eok Kyun Lee, Alan J. Buglass   +5 more
doaj   +1 more source

Evolution‐Inspired Engineering of Diterpene Biosynthesis via Chloroplast Genome Modification

Plant Biotechnology Journal, EarlyView.
ABSTRACT Terpenes constitute the largest and most structurally diverse class of plant secondary metabolites, with critical roles in plant‐environment interactions and broad industrial applications. Although nuclear genome engineering of terpene pathways has been extensively explored, chloroplast genome engineering remains largely undeveloped, with all ...
Alessandro Occhialini, Xinlu Chen, Samantha A. Miller, Mohammad Majdi, Ivette A. Fuentes Quispe, Gabriella King, Feng Chen   +6 more
wiley   +1 more source

Headspace Solid-Phase Microextraction for the Gas Chromatographic Analysis of Organophosphorus Insecticides in Vegetables [PDF]

Journal of AOAC INTERNATIONAL, 2007
Abstract Residues of organophosphorus insecticides (diazinon, methyl parathion, fenitrothion, malathion, and parathion) were determined in 13 different vegetable matrixes by headspace solid- phase microextraction performed with a polydimethyl-siloxane fiber (100 m).
Konstantinos, Fytianos, Garyfallia, Drimaropoulou, Nikolaos, Raikos, Georgios, Theodoridis, Helen, Tsoukali   +4 more
openaire   +2 more sources

Microbiome‐mediated chemical communication in insects: Implications for pest management

Pest Management Science, Volume 82, Issue 9, Page 8132-8151, September 2026.
Microbiome–semiochemical interactions involve the following processes: direct microbial synthesis, host gene regulation, precursor biotransformation, microbiome modulation and indirect ecological signaling. Abstract Insects rely on semiochemicals to regulate aggregation, mating, foraging, and host selection. This review synthesizes evidence that insect‐
Ioannis Eleftherianos, Wei Zhang, Amr Mohamed, Rasha K. Al‐Akeel, Abeer M. Alkhaibari, Nemat Keyhani, Guy Smagghe   +6 more
wiley   +1 more source