Showing papers on "Terpene published in 1969"
TL;DR: A soluble enzyme system obtained from Pinus radiata seedlings incorporates 6–7% of radioactivity from DL-2-14C mevalonic acid into isopentenol, dimethyl allyl alcohol, nerol, and geraniol, suggesting that neryl pyroph phosphate and not geranyl pyrophosphate may be the precursor of cyclic monoterpenes.
39 citations
27 citations
TL;DR: In this article, the terpene and sesquiterpene hydrocarbons in celery essential oil that was recovered by two different methods were separated from the oxygen containing materials by column chromatography and analyzed by temperatureprogrammed gas chromatography.
Abstract: SUMMARY: The terpene and sesquiterpene hydrocarbons in celery essential oil that was recovered by two different methods were separated from the oxygen containing materials by column chromatography and analyzed by temperature-programmed gas chromatography. The essential oils were prepared from celery puree by a batch distillation procedure, and by vaporization in a Votator Turba-Film evaporator and rectification of the vapors in a packed distillation column. The terpenes α-pinene, β-pinene, myrcene, limonene, γ-terpinene and cymene; and the sesquiterpenes β-elemene, β-caryophyllene, α- and β-humulene and β-selinene were identified as constituents of the essential oils. The qualitative and quantitative relationships of the hydrocarbons between the two different oils were established and discussed.
26 citations
TL;DR: The discovery of a direct correlation between serum cholinesterase inhibition by limonene derivatives and their ability to retard plant growth is reported.
Abstract: THE terpene hydrocarbon (+)-limonene is widely distributed in nature and comprises more than 95 per cent of distilled citrus peel oils. As part of a study of limonene derivatives having possible biological activity, I reported the synthesis of a number of quaternary ammonium compounds which are plant growth retardants1,2. Several of these derivatives also inhibited human blood serum (pseudo) cholinesterase in tests for drug activity (my unpublished results). Here I report the discovery of a direct correlation between serum cholinesterase inhibition by these compounds and their ability to retard plant growth.
15 citations
12 citations
01 Jan 1969
TL;DR: In this article, a discussion of possible ways of separating lipophilic mixtures of natural products, the components of which are built up from isoprene units in accordance with Ruzicka's isoperene rule is presented.
Abstract: This chapter contains a discussion of possible ways of separating lipophilic mixtures of natural products, the components of which are built up from isoprene units in accordance with Ruzicka’s isoprene rule [219].
9 citations
7 citations
Patent•
28 Apr 1969TL;DR: The TERPENE ESTERS have a CHARACTERISTIC long lasting FLORAL-WOODY AROMA and are used in the production of PERFUMES and PRFUME PRODUCTS as discussed by the authors.
Abstract: ESTERS OF TERPENE ALCOHOLS WITH ORGANIC ACIDS ARE PREPARED IN NEUTRAL OR ALKALINE MEDIUM IN ORDER TO AVOID ACID CATALYZED DEHYDRATION AND/OR SKELETAL REARRANGEMENTS. ORGANIC ACID HALIDES, ANHYDRIDES OR ESTERS ARE USED AS ACYLATING AGENT UNDER THE PROPER CONDITIONS. THE TERPENE ESTERS HAVE A CHARACTERISTIC LONG LASTING FLORAL-WOODY AROMA AND ARE USEFUL IN THE PRODUCTION OF PERFUMES AND PRFUME PRODUCTS.
7 citations
6 citations
TL;DR: In this paper, the reactions between iron carbonyls and terpenes myrcene, alloocimene, and methyl levopimarate have been investigated and nuclear magnetic resonance and mass spectra are reported for the newly prepared dieneiron tricarbonyl complexes.
Abstract: The reactions between iron carbonyls and the terpenes myrcene, alloocimene, and methyl levopimarate have been investigated. Nuclear magnetic resonance and mass spectra are reported for the newly prepared dieneiron tricarbonyl complexes.
TL;DR: The present results and the extensive data in the literature indicate that the effects of the tropolones and terpenes, can be related to their structure.
Abstract: The cytogenetic effects of three terpenes, a tropolone, and an anthraquinone on mitosingVicia faba cells were investigated. The three terpenes (α+β) thujone, thujylic alcohol, sabinene), and the tropolone (β-thujaplicin), induce partial or complete failure of the spindle apparatus. In addition, the terpenes induce tripolar mitoses; the tropolone and the terpenes (except sabinene) induce chromosomal stickiness; thujaplicin, thujone and the anthraquinone (aloe-emodin-glucoside) induce chromosomal aberrations. The latter in particular causes subchromatid breaks and rearrangements. The present results and the extensive data in the literature indicate that the effects of the tropolones and terpenes, can be related to their structure. No such relationship could be deduced for the anthraquinones.
TL;DR: Substances with antibiotic activity have been found among the terpenes as mentioned in this paper, and extensive studies have been made of the antibiotic proper t ies of ethereal oils, alkaloids, glucosides, tannins, individual organic acids, and so on.
Abstract: Substances with antibiotic activity have been found among the terpenes. Aliphatic terpenes (citral, citronellol, linalool, etc.) bestow antibiotic activity on several ethereal oils relat ive to cer tain Gram-pos i tive and Gram-negat ive bacter ia [1, 2]. The antifungal activity of the hydrocarbon squalene, widely d i s t r i buted in nature, likewise has been demonstra ted [3]. In recent years juice extracts have been investigated and extensive studies have been made of the antibiotic proper t ies of ethereal oils, alkaloids, glucosides, tannins, individual organic acids, and so on [4].
TL;DR: From the first crop of P. graveolens and the first and third ones of P roseum Bourbon, low-boiling compounds escaping during the steam distillation were collected, and examined through gas chromatography and the preparation of their derivatives as discussed by the authors.
Abstract: From the first crop of P. graveolens and the first and third ones of P. roseum Bourbon, low-boiling compounds escaping during the steam distillation were collected, and examined through gas chromatography and the preparation of their derivatives. Nine hydrocarbons, five carbonyl compounds, three alcohols, two esters and one sulfide were identified. Among these twenty compounds, sixteen compounds except dimethyl sulfide, α-pinene, myrcene and limonene were newly identified in the geranium species. Appreciable variation between the species was observed in contents of methanol, acetone, dimethyl sulfide and terpene hydrocarbons.