Beta Pinene
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Composição química e atividade biológica das folhas e frutos de Triphasia trifolia
The chemical composition of the essential oils from leaves and fruits of Triphasia trifolia was analyzed by GC-FID and GC-MS. The major constituents of oil obtained from leaves were sabinene (35.4%) and myrcene (34.1%), while the prevalent compounds in oil from fruits were sabinene (37.2%), beta-pinene (23.95) and gamma-terpinene (16.3%). Both oils showed mo
Química Nova. Publicado em: 2008
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2. Monoterpenos di-hidroxilados e hidróxi-nitrogenados 1,2 e 1,3 como ligantes quirais em reação de reformatsky assimétrica
This study describes the use of three (-)-alpha-pinene derivatives, one diol-1,2 [(-)-(1R, 2R, 3S, 5R)-2,6,6-trimethylbicyclo[3.1.1]heptane-2,3-diol 4] and two piridine-hydroxy derivatives [(+)-(1R,2S,3R,5S)-2,6,6-trimethyl-3-(2-pyridinylmethyl)bicyclo[3.1.1]heptan-3-ol 7 and (-)-(1R,2S,3R,5S)-2,6,6-trimethyl-3-[2-(2-pyridinyl) ethyl]bicyclo[3.1.1]heptan-3-o
Química Nova. Publicado em: 2008
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3. Atividade acaricida dos óleos essencias de folhas e frutos de Xylopia sericea sobre o ácaro rajado (Tetranychus urticae Koch)
The essential oils of the leaves and fruits obtained by hydrodistillation of Xylopia sericea, collected in the restinga area of Pernambuco, were analyzed by GC (HP 5890 SERIES II) and GC/MS (HP 5890B SERIES II/ MSD 5971). A major part of the volatile components identified in the oils of fruits and leaves were monoterpenes and sesquiterpenes. Cubenol (57.43%)
Química Nova. Publicado em: 2007-08
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4. Pharmacological properties of the monoterpenes α- and β-pinene on rat gastrointestinal smooth muscle: myorelaxant and prokinetic effects / Propriedades farmacolÃgicas dos monoterpenos α- e β-pineno no mÃsculo liso gastrintestinal de ratos: efeito miorrelaxante e prÃ-cinÃtico
α- e β-pineno sÃo monoterpenos constituintes do Ãleo essencial de plantas encontradas no Nordeste do Brasil como a malva-santa e o eucalipto que, na medicina popular, sÃo usadas no tratamento de distÃrbios intestinais e respiratÃrios. As aÃÃes miorrelaxantes desses Ãleos essenciais sÃo atribuÃdas à presenÃa de α- e de β-pineno
Publicado em: 2007
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5. Production of aromas and fragrances through microbial oxidation of monoterpenes
Aromas and fragrances can be obtained through the microbial oxidation of monoterpenes. Many microorganisms can be used to carry out extremely specific conversions using substrates of low commercial value. However, for many species, these substrates are highly toxic, consequently inhibiting their metabolism. In this work, the conversion ability of Aspergillus
Brazilian Journal of Chemical Engineering. Publicado em: 2006-09
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6. Constituintes químicos voláteis e não-voláteis de Cochlospermum vitifolium (Willdenow) Sprengel
The essential oils from leaves, root bark and root wood of Cochlospermum vitifolium were investigated for the first time. The oils were obtained by hydrodistillation and analyzed by GC/MS. The main volatile constituents were beta-caryophyllene (8.2 - 46.5%), beta-bisabolene (11.5 - 29.3%), gamma-muurolene (28.4%), alpha-humulene (26.0%), 1-hydroxy-3-hexadeca
Química Nova. Publicado em: 2005-02
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7. Síntese, caracterização e estudo das propriedades catalíticas e magnéticas de nanopartículas de Ni dispersas em matriz mesoporosa de SiO2
Nickel nanoparticles supported on amorphous silica ceramic matrix were synthesized by the polymeric precursor method. The nanostructure was characterized by NMR, BET, XRD, SEM, TEM, and flame atomic absorption spectrometry techniques. It was observed a dependence of the crystallite size on the thermal annealing, under a N2 atmosphere. The materials presented
Química Nova. Publicado em: 2002-11
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8. Constituintes quimicos de cinco especies de Echinodorus e avaliação do beta-pineno como substrato para obtenção de quirons mais elaborados
The present thesis has been divided into two sections The first part concerns the isolation and identification of the secondary metabolites of the leaves and pecioles of Echinodorus grandiflorus from Curitiba-PR. Conventional phytochemical analysis resulted in the identification of 11 compounds : phytol (8), hardwickic acid, methyl ester (14a), echinoic acid
Publicado em: 2000
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9. Estudo fitoquimico de Baccharis myriocephala e uso de beta-pineno para a obtenção de orto-mentanos
This thesis was developed into two different parts. Part A involves the phytochemical investigation of roots and aerial parts of Baccharis myriocephala. The specimen was collected in Serra do Mar, São Paulo. From the hexane and methanolic extract we have detected and isolated poliacetylenes, (-)-caryophyllene oxide, baccharis oxide, b-friedelanol and long c
Publicado em: 1997
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10. Liquid/air partition coefficients of four terpenes.
The liquid/air partition coefficients of four common terpenes, alpha-pinene, beta-pinene, 3-carene, and limonene, have been determined in vitro using head space technique. The liquids used were water, human blood, and olive oil. alpha-Pinene, beta-pinene, and 3-carene were practically insoluble in water and limonene was slightly soluble; all were readily dis
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11. Short term inhalation exposure to turpentine: toxicokinetics and acute effects in men.
OBJECTIVES: This study describes the toxicokinetics, pulmonary function, and subjective ratings of discomfort in volunteers experimentally exposed to turpentine vapour (a mixture of monoterpenes). The results were compared with similar exposure to single monoterpenes to look in the toxicokinetics and acute effects for signs of interactions between the monote
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12. Effects of beta-pinene on yeast membrane functions.
The effects of beta-pinene on yeast cells were studied. This terpene inhibited respiration with glucose or ethanol as the substrate. The inhibition depended on the ratio of the terpene to the amount of yeast cells; for a fixed concentration of pinene, inhibition decreased as the amount of yeast cells increased. Pinene also inhibited the pumping of protons an