Dynamic Headspace
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Floral Scent and Nectar Sugar Composition of Temnadenia odorifera (Apocynoideae, Apocynaceae)
Temnadenia odorifera is an endemic species from the Brazilian Atlantic Forest. This study was developed in order to identify the volatile compounds emitted by the living flowers and nectar, to evaluate the temporal pattern of scent emission, and the sugars composition of its nectar. Analyses of the flower scent by dynamic headspace in vivo, of nectar sugar c
J. Braz. Chem. Soc.. Publicado em: 2019-02
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2. Male-Specific Volatiles Released by the Big Avocado Seed Weevil Heilipus lauri Boheman (Coleoptera: Curculionidae)
The big avocado seed weevil, Heilipus lauri Boheman (Coleoptera: Curculionidae), is one of the most significant pests of avocado in Colombia and other countries, such as Mexico. The volatile compounds produced by males and females were collected by headspace (HS)-solid phase microextraction (SPME) and dynamic headspace collection (DHS) on a sorbent. Comparat
J. Braz. Chem. Soc.. Publicado em: 2019-01
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3. Floral scent of brazilian Passiflora: five species analised by dynamic headspace
ABSTRACT This study describes for the first time the chemical composition and olfactive description of floral scent from Brazilian Passiflora (Passiflora edulis Sim, Passiflora alata Curtis, Passiflora cincinnata Mast., Passiflora coccinea Aubl. and Passiflora quadrangularis L.). Five species were grown in greenhouse at the Agronomic Institute (IAC), São Pa
An. Acad. Bras. Ciênc.. Publicado em: 01/09/2016
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4. TYPING HONEY SERGIPE THROUGH THE STATE OF THE PROFILE OF VOLATILE SUBSTANCE OBTAINED BY DYNAMIC HEADSPACE FOLLOWED BY GAS CHROMATOGRAPHY MASS SPECTROMETRY COUPLED THE (GC / MS). / TIPIFICAÇÃO DE MÉIS DO ESTADO DE SERGIPE ATRAVÉS DO PERFIL QUÍMICO DOS COMPOSTOS VOLÁTEIS OBTIDOS POR HEADSPACE DINÂMICO SEGUIDO POR CROMATOGRAFIA EM FASE GASOSA ACOPLADA A ESPECTROMETRIA DE MASSAS (CG/EM).
Dentre os produtos apícolas o mel é considerado o principal por se destacar como alimento natural e ter várias aplicações farmacológicas, podendo ser produzido por abelhas Apis mellifera a partir do néctar, secreções das plantas e frutos, excreções de afídeos e outras soluções adocicadas. Seu poder nutritivo, farmacológico e valor comercial de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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5. CONTRIBUIÇÃO À QUÍMICA DOS COMPOSTOS VOLÁTEIS DE LIPPIA ALBA (MILL) N. E. BROWN E PELARGONIUM GRAVEOLENS LHERIT E ATIVIDADE INSETICIDA FRENTE À SPODOPTERA FRUGIPERDA (J. E. SMITH).
O presente trabalho foi dividido em 3 partes os quais abordam 2 temas centrais: estudo dos compostos voláteis de Pelargonium graveolens e do óleo essencial de Lippia alba e avaliação de atividade inseticida frente à Spodoptera frugiperda. O capítulo 2 abordou o estudo dos voláteis das folhas de P. graveolens extraídos por headspace dinâmico utlizand
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
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6. Interações tritróficas entre Diatraea flavipennella (Lepidoptera: Crambidae), Saccharum officinarum (Poales: Poaceae) e Cotesia flavipes (Hymenoptera: Braconidae) e atividade antifúngica de compostos produzidos por Atta spp. (Hymenoptera: Formicidae) / Tritrophic interactions between Diatraea flavipennella (Lepidoptera: Crambidae), Saccharum officinarum (Poales: Poaceae) and Cotesia flavipes (Hymenoptera: Braconidae) and antifungal activity of compounds produced by Atta spp. (Hymenoptera: Formicidae)
Aiming to study the reproductive behaviour of Diatraea flavipennella Box, 1931 (Lepidoptera: Crambidae) in the presence and absence of three different varieties of sugarcane plants, the searching behavior of Cotesia flavipes (Hymenoptera: Braconidae) for larvae of D. flavipenella in non-infested and D. flavipennella infested sugarcane plants, the olfactive r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
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7. Hyptis fruticosa Salzm. ex Benth. (Lamiaceae): caracterização botânica, química, avaliações ecofisiológicas e atividades farmacológicas. / Hyptis fruticosa Salzm. ex Benth. (Lamiaceae): characterization botany, chemistry, ecophysiological assessments and pharmacological activities.
Hyptis fruticosa Salzm. ex Benth. (Alecrim do campo) is an aromatic plant widely used in folk medicine due to its therapeutic properties. Therefore the aim of this work was to undertake botanical, chemical, ecophysiological, and pharmacological studies. The botanical investigations observed and analyzed information about morphological, physiological, and env
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2010
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8. Editorial
The volatile compounds of raw and extruded bovine rumen, extracted by dynamic headspace, were separated by gas chromatography and analyzed by GC-MS. Raw and extruded materials presented thirty-two volatile compounds. The following compounds were identified in raw bovine rumen: heptane, 1-heptene, 4-methyl-2-pentanone, toluene, hexanal, ethyl butyrate, o-xyle
Química Nova. Publicado em: 2008
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9. Volatile composition and flavour of Italian types dry fermented sausage produced in Brazil / Composição de volateis e earoma de salames nacionais tipos Italiano e Milano
Dry-fermented sausages are meaty products resulting from fermentation and dehydration/ripening processes. They are produced and consumed worldwide because of their typical sensory characteristics mainly in relation to the aroma and flavor. In Brazil this product has reached successive record sales in the internal market, with a total sale of R$ 265 million d
Publicado em: 2008
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10. Desenvolvimento e validação de metodo analitico para a determinação de contaminantes volateis provenientes de embalagens de PET (polietileno tereftalato) e sua aplicação em PET pos-consumo. / Development and validation of an analytical method for the determination of volatile contaminants from PET (polyethylene terephtalate) packaging and its application in PET post-consumption.
The main approach of the present work was the development and validation of an analytical method for the determination of volatile contaminants from polyethylene terephthalate (PET) packaging, using the headspace dynamic concentration technique in the extraction stage and chromatographic techniques for identification and quantification. The method was valida
Publicado em: 2007
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11. Studies of the alterations of the integral juice of maracuja in packing of the type pet and glass. / Estudos das alteraÃÃes do suco de maracujà integral em embalagem do tipo pet e vidro.
In Brazil, is traditional the consumption of plain tropical fruit juices bottled in glass or PET materials. The packaging materials are essential to protect the food product and to preserve its inherent quality during the storage. However sorption phenomena from food to packaging materials and the migration phenomena from packaging to the food may alter the
Publicado em: 2007
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12. Dispositivos hifenados para microextração em fase solida / Hyphenated devices for solid phase microextraction
In this work systems for Dynamic Headspace sampling (DHS) combined to Solid Phase Microextraction (SPME) were develloped, and different SPME fibers were evaluated for applications in Fiber Introducton Mass Spectrometry (FIMS). In the DHS-SPME systems assembled, analytes from solid, liquid or viscous samples can be extracted. A continuous flow of stripping ga
Publicado em: 2005