Hexanoic Acid
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. The effects of adding garlic (Allium sativum L.) on the volatile composition and quality properties of yogurt
Abstract In this study, the effects of adding garlic (Allium sativum L.) of different origins on the volatile composition and quality properties of yogurt were investigated on day 1, 7 and 14 of storage. The addition of garlic did not cause a decrease in the total specific microorganism count (>107) in yogurt samples, and it led to a significant decrease in
Food Sci. Technol. Publicado em: 2020-12
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2. Headspace analysis and characterisation of South African propolis volatile compounds using GCxGC–ToF–MS
ABSTRACT Propolis also known as "bee glue or bee resin" is a resinous mixture of bee saliva or bee wax and exudate from tree trunks and flowers, produced by honeybees. The composition of propolis varies depending on the vegetation the bees can access. It is therefore expected that propolis obtained from various localities may have different chemical profiles
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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3. Identificaton of the Alarm and Sex Pheromones of the Leaf-Footed Bug, Leptoglossus zonatus (Heteroptera: Coreidae)
The leaf-footed bug, Leptoglossus zonatus (Heteroptera: Coreidae), is mainly found in maize fields in Brazil. In this work, we elucidated and quantified the volatile compounds from nymphs and adults of L. zonatus. The defensive compounds produced by nymphs are aldehydes and oxo-alkenals, with some compounds showing different proportions between instars. For
J. Braz. Chem. Soc.. Publicado em: 08/04/2019
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4. Terpene Esters from Natural Products: Synthesis and Evaluation of Cytotoxic Activity
ABSTRACT Natural steroids and triterpenes such as b-sitosterol, stigmasterol, lupeol, ursolic and betulinic acids were transformed into its hexanoic and oleic esters, to evaluate the influence of chemical modification towards the cytotoxic activities against tumor cells. The derivatives were evaluated against five tumor cell lines [OVCAR-8 (ovarian carcinoma
An. Acad. Bras. Ciênc.. Publicado em: 14/08/2017
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5. Otimização da esterificação de ácido hexanóico com n-butanol empregando lipase (Termomyces lanuginosus) imobilizada em gelatina
The application of Lipozyme (Termomyces lanuginosus) immobilized in gelatin gel in aliphatic ester synthesis was investigated taking the esterification of hexanoic acid with n-butanol as a model reaction. Conditions were optimized by factorial design and the highest conversion was obtained under the following conditions: molar ratio alcohol: acid of 2:1, rea
Quím. Nova. Publicado em: 2013
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6. Compostos voláteis em noni (Morinda citrifolia L.) em dois estágios de maturação
The volatile components of noni at two ripening stages were isolated by headspace solid-phase microextraction using 65 µm Polydimethylsiloxane-Divinylbenzene (PDMS/DVB) fibers and analyzed using GC/MS. Both maturation stages had several compounds in common. Ninety-six compounds were identified, from which octanoic acid (
Food Science and Technology. Publicado em: 2010-03
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7. Avaliação do potencial de Burkholderia sacchari produzir o copolimero biodegradável poli(3-hidroxibutirato-co-3-hidroxihexanoato) [P(3HB-co-3HHX)]. / Evaluating the potential of Burkholderia sacchari to produce the biodegradable copolymer poly (3-hydroxybutirate-co-3-hydroxyhexanoate).
The ability of B. sacchari to accumulate poly-3-hydroxybutyrate-co-3-hydroxyhexanoate (P3HB-co-3HHx) from glucose and hexanoic acid was confirmed. 3HHx content was up to 2 mol% of PHA (<10% of the maximum theoretical 3HHx from the acid), indicating a substrate flexibility of B. sacchari PHA synthase, but high efficiency of hexanoate catabolic pathways. Therm
Publicado em: 2010
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8. INSECTICIDAL ACTIVITY OF Trichilia SPECIES AGAINST ON FALL ARMYWORM Spodoptera frugiperda. / Atividade inseticida de espécies de trichilia frente à lagarta-do-cartucho do milho spodoptera frugiperda
This work presents the phytochemical study and biological assays carried out with organic extracts of fruits and seeds from Trichilia claussenii, T. elegans and inflorescence from T. catigua against S. frugiperda. Among the extracts assayed, the methanol extracts of seeds from T. claussenii and inflorescence from T. catigua presented the highest insecticidal
Publicado em: 2008
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9. Resolução do ()-citronelol e ácido ()-citronélico via esterificação enantiosseletiva catalisada pela lipase de candida antarctica
In this work Candida antarctica lipase (CAL-B) was used in the resolution of the ()-citronellol and ()-citronellic acid, by enantioselective esterification. Chiral terpenic acids and alcohols are excellent building blocks for the preparation of more complex molecules with possible biological activities. The ()-citronellic acid has been used as the base mater
Publicado em: 2007
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10. Qualidade e perfil volÃtil de pequi (Caryocar brasiliense Camb.) minimamente processado, armazenado sob diferentes temperaturas / Quality and volatile profile of fresh-cut pequi (Caryocar brasiliense Camb.), stored under diferents temperatures
Pequi (Caryocar brasiliense Camb.) is one of the most common fruits of the Brazilian Savana, used of different forms in the regional culinary, where the fruit is produced. The objective of this work was to verify the influence of four different temperatures on the maintenance of quality of the fresh-cut fruit stored for 15 days (0+1ÂC and 5+1ÂC), 9 days (1
Publicado em: 2006
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11. ESTUDO DE COMPLEXOS DE NI (II) COM OS LIGANTES DODECANOTIOL E ÁCIDO HEXANÓICO / STUDY OF THE NI (II) COMPLEXES WITH THE LIGANDS DODECANETHIOL AND HEXANOIC ACID
The presence of metal ions in oil can affect the quality of the distillation products. With the purpose of evaluating some effects of the presence of Ni (II) in oil, a study of complexes of this ion with the model ligands dodecanethiol (which represents the mercaptans in oil) and hexanoic acid (which represents the carboxylic acids in oil) was performed. Thi
Publicado em: 2005
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12. ESTUDO DO COMPORTAMENTO DOS METAIS CHUMBO E MERCÚRIO NA PRESENÇA DO 1-DODECANOTIOL E DO ÁCIDO HEXANÓICO EM MATRIZ DE HIDROCARBONETOS / STUDY OF THE BEHAVIOR OF THE METALS LEAD AND MERCURY IN THE PRESENCE OF 1-DODECANETHIOL AND HEXANOIC ACID IN HYDROCARBONS MATRIX
Os combustíveis constituem um grupo de extrema importância para a economia de cada país. Alterações nas suas propriedades químicas e físicoquímicas podem ocorrer devido a reações químicas no meio, comprometendo assim, a qualidade do produto, o que não é desejável. Um dos fatores que influenciam na estabilidade desses combustíveis é a presenç
Publicado em: 2005