Results 71 to 80 of about 37,813 (234)

Volatile Compounds in Feathers of the Scarlet Macaw (Ara macao) Reflect Sex and Pair‐Bond Status

open access: yesIntegrative Zoology, EarlyView.
Scarlet macaws exhibit sex‐ and pair‐related differences in plumage volatile composition, with males showing greater chemical richness. Partnered individuals differ in specific compound classes, whereas no clear association with immune function was detected. These results support a potential role for olfactory cues in sexual and social communication in
Elisa Espartosa   +3 more
wiley   +1 more source

Determinaçao do teor de nicotina em cigarros comerciais e ilegalmente comercilizados utilizando microextraçao em fase sólida e cromatografia Gasosa acoplada a espectrometria de massas [PDF]

open access: yes, 2009
TCC (graduação) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Curso de Química.Comercialmente, o tabaco pode ser encontrado no cigarro, estando presente seu principal alcalóide, a nicotina.
Trilha, Rafaella
core  

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

open access: yesEcological 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   +8 more
wiley   +1 more source

Preconcentration and Determination of Lead for Trace Levels in Water and Wastewater Samples by Vortex-Assisted Microextraction Using TPAS as a New Synthetic Complexing Agent with Electrothermal Atomic Absorption Spectroscopy Detection [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2017
A simple and rapid solidified vortex assisted 1-undecanol based liquid-liquid microextraction technique was proposed for preconcentration of trace levels of lead ions.
Hassanali Moradi   +5 more
doaj  

Efficient Low-Cost Procedure for Microextraction of Estrogen from Environmental Water Using Magnetic Ionic Liquids

open access: yesMolecules, 2020
In this study, three magnetic ionic liquids (MILs) were investigated for extraction of four estrogens, i.e., estrone (E1), estradiol (E2), estriol (E3), and ethinylestradiol (EE2), from environmental water.
Paula Berton   +5 more
doaj   +1 more source

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

open access: yesEcological 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   +5 more
wiley   +1 more source

Environmental influences on grape aroma potential [PDF]

open access: yes, 2011
Understanding the source of wine volatile compounds and the mechanisms that influence their formation through grape growing, winemaking and storage is essential for wine businesses when developing strategies to produce wines with specific sensory ...
Robinson, Anthony
core  

Advanced Techniques for Quantification of N-nitrosodiethanolamine in Cosmetic Products [PDF]

open access: yesJournal of Mazandaran University of Medical Sciences, 2023
Cosmetics are daily chemical industrial products used for cleaning, health care, and beauty purposes. Sometimes these products are contaminated by heavy metals, unwanted chemicals, and other dangerous substances that can lead to environmental pollution ...
Zahra Valipanah   +3 more
doaj  

Thermogenesis‐derived spatiotemporal microclimates guide pollinator movement to ensure pollination

open access: yesJournal 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   +5 more
wiley   +1 more source

Fibras com revestimento nanoestruturado de polipirrol para uso em microextração em fase sólida [PDF]

open access: yes, 2011
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2011O presente trabalho visou o desenvolvimento de novas fibras extratoras para a técnica de ...
Jasinski, Éverton Fabian
core  

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