Terpene Derivatives, Essential Oils, Balsams and Resins

Stahl, Egon; Jork, H.

doi:10.1007/978-3-642-88488-7_11

Cited by 10 publications

(5 citation statements)

References 154 publications

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“…The column was washed with benzene (140 ml) to yield 18 mg of the 1-acenaphthenone (representing a 9% conversion of starting material). When chromatographed on TLC (RI, 0.64) and sprayed with DNPH, the spot turned a dark yellow color indicative of a cyclic ketone (29 [sh] nm) identical to the spectra given by authentic 1-acenaphthenol. Furthermore, the HPLC retention time and migration on TLC (Rf, 0.49) of the metabolite and the authentic material were the same.…”

Section: Hplc Resultsmentioning

confidence: 91%

Bacterial oxidation of the polycyclic aromatic hydrocarbons acenaphthene and acenaphthylene

Schocken¹,

Gibson²

1984

Appl Environ Microbiol

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A Beijerinckia sp. and a mutant strain, Beijerinckia sp. strain B8/36, were shown to cooxidize the polycyclic aromatic hydrocarbons acenaphthene and acenaphthylene. Both organisms oxidized acenaphthene to the same spectrum of metabolites, which included 1-acenaphthenol, 1-acenaphthenone, 1,2-acenaphthenediol, acenaphthenequinone, and a compound that was tentatively identified as 1,2-dihydroxyacenaphthylene. In contrast, acenaphthylene was oxidized to acenaphthenequinone and the compound tentatively identified as 1,2dihydroxyacenaphthylene by the wild-type strain of Beijerinckia. Both of these products were also formed when the organism was incubated with synthetic cis-1,2-acenaphthenediol. A metabolite identified as cis-1,2acenaphthenediol was formed from acenaphthylene by the mutant Beijerinckia sp. strain B8/36. Cell extracts prepared from the wild-type Beijerinckia strain contain a constitutive pyridine nucleotide-dependent dehydrogenase which can oxidize l-acenaphthenol and 9-fluorenol. The results indicate that although acenaphthene and acenaphthylene are both oxidized to acenaphthenequinone, the pathways leading to the formation of this end product are different.

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Section: Hplc Resultsmentioning

confidence: 91%

Bacterial oxidation of the polycyclic aromatic hydrocarbons acenaphthene and acenaphthylene

Schocken¹,

Gibson²

1984

Appl Environ Microbiol

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“…The mixture was centrifuged, and the hypophase was concentrated to dryness under a stream of nitrogen before thin layer chromatography. Silica gel plates were prepared with hexane:acetone (60:40 [v/v]), and the position of the reaction products was observed under UV-visible light before and after spraying the plate with a solution of acidic 2,4-dinitrophenylhydrazine to detect aldehydes and ketones (Stahl and Jork, 1965). HPLC separation of CsCCD reaction products was performed on a Zorbax ODS column (4.6 mm ϫ 25 cm) as described above.…”

Section: Production and Assay Of Recombinant Carotenoid Cleavage Dioxmentioning

confidence: 99%

Oxidative Remodeling of Chromoplast Carotenoids

et al. 2002

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The accumulation of three major carotenoid derivatives-crocetin glycosides, picrocrocin, and safranal-is in large part responsible for the color, bitter taste, and aroma of saffron, which is obtained from the dried styles of Crocus. We have identified and functionally characterized the Crocus zeaxanthin 7,8(7 ,8 )-cleavage dioxygenase gene ( CsZCD ), which codes for a chromoplast enzyme that initiates the biogenesis of these derivatives. The Crocus carotenoid 9,10(9 ,10 )-cleavage dioxygenase gene ( CsCCD ) also has been cloned, and the comparison of substrate specificities between these two enzymes has shown that the CsCCD enzyme acts on a broader range of precursors. CsZCD expression is restricted to the style branch tissues and is enhanced under dehydration stress, whereas CsCCD is expressed constitutively in flower and leaf tissues irrespective of dehydration stress. Electron microscopy revealed that the accumulation of saffron metabolites is accompanied by the differentiation of amyloplasts and chromoplasts and by interactions between chromoplasts and the vacuole. Our data suggest that a stepwise sequence exists that involves the oxidative cleavage of zeaxanthin in chromoplasts followed by the sequestration of modified water-soluble derivatives into the central vacuole.

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“…As frações éter de petróleo e diclorometano foram cromatografadas com o eluente éter de petróleo:acetona (9:1), tendo como substâncias de referência o eucaliptol (R f = 0,33) e o β-sitosterol (R f = 0,21). Manchas de cor violácea, após nebulização com anisaldeído-H 2 SO 4 , de R f = 0,77; 0,62; 0,32; 0,22 e 0,16 sugerem a presença de terpenos nestas frações (STAHL;JORK, 1969).…”

Section: Resultsunclassified

Caracterização físico-química e biológica do caule de Caesalpinia ferrea Mart.

Frasson¹,

Bittencourt²,

Heinzmann³

2003

Rev. bras. farmacogn.

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RESUMO: Visando estabelecer parâmetros para o controle da qualidade do caule de Caesalpinia ferrea Mart. (Caesalpiniaceae), foram realizados testes preconizados pela Farmacopéia Brasileira IV e pela Organização Mundial da Saúde para a avaliação da pureza, através das determinações de materiais estranhos, cinzas totais, cinzas insolúveis em ácido, umidade, ensaios-limites de cloretos e sulfatos, além da pesquisa de contaminantes microbianos no material pulverizado. Para a caracterização dos constituintes, eventualmente presentes na droga vegetal, foram realizadas as determinações de taninos, dos índices de espuma, intumescimento e amargor e o teste de hemólise; também foi realizada a caracterização do extrato etanólico bruto e suas frações por cromatografia em camada delgada.Unitermos: Caesalpinia ferrea; controle de qualidade; drogas vegetais ABSTRACT: Physico-chemical and biological characterization of Caesalpinia ferrea Mart. stems. In order to establish parameters for the control quality of Caesalpinia ferrea Mart. stem, the drug was characterized by the methods described in Farmacopéia Brasileira IV and by the World Health Organization. The powdered plant material was submitted to the following tests for purity evaluation: foreign matter, total ash, acid insoluble ash, water content, chloride and sulfate limit assays, and microbiological contamination. Determination of haemolytic activity, foaming index, swelling index and bitterness index were done to characterize the constituents eventually present in the drug, as well as the characterization of the ethanolic crude extract and its fractions by thinlayer chromatography.

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Terpene Derivatives, Essential Oils, Balsams and Resins

Cited by 10 publications

References 154 publications

Bacterial oxidation of the polycyclic aromatic hydrocarbons acenaphthene and acenaphthylene

Bacterial oxidation of the polycyclic aromatic hydrocarbons acenaphthene and acenaphthylene

Oxidative Remodeling of Chromoplast Carotenoids

Caracterização físico-química e biológica do caule de Caesalpinia ferrea Mart.

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