Stevia 1982 462. Ethnopharmacology




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Stevia 1982
462. Ethnopharmacology versus chemosystematics in the search for biologically active principles in plants

Journal of Ethnopharmacology, Volume 6, Issue 2, September 1982, Pages 227-238

Otto R. Gottlieb



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Abstract

The chemicals to which Brazilian angiosperms owe their use in the preparation of arrow poisons, hallucinogens, fish poisons, drugs, stimulants, spices, perfumes and pigments are correlated with the systematic position of the species in which they occur. Most compounds are produced either by the primitive Magnoliidae (sensu Cronquist) or by the advanced Asteridae. The Rosidae-Dilleniidae, precisely the group of subclasses of widest distribution over the country, have heretofore yielded relatively few useful compounds. This fact can be rationalized by the presence in their species of massive quantities of gallo- and ellagitannins, general defences which make the presence of specific alleochemics superfluous. The natural occurrence of specific biologically active compounds is thus ecologically and systematically conditioned and it should be possible to build a system capable of predicting the existence and the nature of useful chemicals in plant taxa.

463. Stevia rebaudiana : III. High-performance liquid chromatographic separation and quantitation of rebaudiosides B, D, and E, dulcoside A, and steviolbioside
Journal of Chromatography A, Volume 245, Issue 3, 27 August 1982, Pages 373-376
M. S. Ahmed, R. H. Dobberstein

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No abstract is available for this article.

464. Steviol-glycosides: New natural sweeteners

TrAC Trends in Analytical Chemistry, Volume 1, Issue 11, July 1982, Pages 246-248

Osamu Tanaka



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Abstract

The need for a safe, non-nutritive sweetener for the diabetic and the diet conscious has prompted the further investigation of new sweeteners of plant origin. This review deals with the chemistry of sweet steviol-glycosides, which are currently used as a food-additive in Japan.


465. Potential sweetening agents of plant origin : I. Purification of Stevia rebaudiana sweet constituents by droplet counter-current chromatography



Journal of Chromatography A, Volume 237, Issue 3, 26 March 1982, Pages 478-483

A. D. Kinghorn, N. P. D. Nanayakkara, D. D. Soejarto, P. J. Medon, S. Kamath



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103: J Nat Prod. 1982 Sep-Oct;45(5):590-99. Related Articles, Links


Potential sweetening agents of plant origin. III. Organoleptic evaluation of Stevia leaf herbarium samples for sweetness.

Soejarto DD, Kinghorn AD, Farnsworth NR.
A total of 184 Stevia leaf samples taken from herbarium specimens, representing 110 species and 121 taxa, were screened organoleptically for their taste sensation. Fragments of a 62-year-old leaf of S. rebaudiana exhibited a potent and prolonged sensation of sweetness, thereby indicating the stability of its sweet ent-kaurene glycoside constituents to drying, preservation, mounting and storage. No other leaf samples exhibited an intensity of sweetness equivalent to that of S. rebaudiana, though 18 species and varieties were considered to exhibit a sweet taste. These taxa appear to be promising candidates for future phytochemical investigation for new and known ent-kaurene glycosides.
PMID: 7153776 [PubMed - indexed for MEDLINE]


Potential Sweetening Agents of Plant Origin. III. Organoleptic Evaluation of Stevia Leaf Herbarium Samples For Sweetness

Djaja D. Soejarto, A. Douglas Kinghorn, Norman R. Farnsworth

J. Nat. Prod., 1982, 45 (5), pp 590–599

DOI: 10.1021/np50023a013

Publication Date: September 1982





Stevia rebaudiana : II. High--performance liquid chromatographic separation and quantitation of stevioside, rebaudioside A and rebaudioside C

Journal of Chromatography A, Volume 236, Issue 2, 19 February 1982, Pages 519-522

M. S. Ahmed, R. H. Dobberstein



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467. Chapter 32. Nonnutritive Sweeteners. The Search for Sucrose Mimics.

Annual Reports in Medicinal Chemistry, Volume 17, 1982, Pages 323-332

GrantE. DuBois



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468. Desangeloylshairidin, a sesquiterpene lactone from Guillonea scabra



Phytochemistry, Volume 21, Issue 7, 1982, Pages 1802-1804

Mariano Pinar, Manuel Rico, Benjamín Rodríguez



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Abstract

From the roots of Guillonea scabra a new sesquiterpene lactone has been isolated. Its structure has been established by spectroscopic means as desangeloylshairidin.


469.
Isolation and structure of stephalic acid, a new clerodane diterpene from Stevia polycephala

Phytochemistry, Volume 21, Issue 7, 1982, Pages 1804-1806

Enrique Angeles, Kirsten Folting, Paul A. Grieco, John C. Huffman, R. Miranda, Manuel Salmón



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Abstract

From the methanolic extract of Stevia polycephala a new clerodane-type diterpene, stephalic acid, was isolated. The structure and stereochemistry were determined by a combination of spectral data and single-crystal X-ray analysis.

470. Diterpenes from Stevia monardaefolia

Phytochemistry, Volume 21, Issue 6, 1982, Pages 1369-1371

L. Quijano, J. S. Calderón, F. Gómez, J. L. Vega, T. Ríos



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Abstract

An investigation of Stevia monardaefolia resulted in the isolation of two new labdane type diterpenes, 6α-angeloyloxy nidorellol and 6α-angeloy

471. Enzymatic determination of stevioside in Stevia rebaudiana

Phytochemistry, Volume 21, Issue 8, 1982, Pages 1927-1930

Hajime Mizukami, Keiko Shiiba, Hiromu Ohashi



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Abstract

A simple enzymatic method is described for the determination of stevioside in Stevia rebaudiana. The method is based on the hydrolysis of stevioside with crude hesperidinase. The reaction is followed by monitoring the production of glucose with a glucose oxidase-peroxidase-2, 2′-azino-di-(3-ethylbenzothiazoline-6-sulfonic acid) system. The results for the stevioside content in S. rebaudiana leaves correlate with those obtained by other methods. The stevioside content in S. rebaudiana plants showed large variation.

472. Biosynthesis of a β-(1 → 4)-mannan in fenugreek seedlings

Phytochemistry, Volume 21, Issue 8, 1982, Pages 1951-1954

S. Clermont, R. Said, F. Percheron



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A particulate enzymatic preparation, extracted from fenugreek seedlings (Trigonella foenum-graecum) catalyses the transfer of mannose from guanosine diphosphate-[U-14C]mannose and its incorporation into an alkali-soluble polysaccharide. Chemical and enzymatic study of this polysaccharide reveals the presence of only one type of osidic linkage, namely β-(1 → 4)--mannopyranosyl. The influence of some factors on this biosynthesis was studied, as well as the MW of the polysaccharide and the existence of an endogenous acceptor.

473. Sesquiterpenes, guaianolides and diterpenes from Stevia myriadenia

Phytochemistry, Volume 21, Issue 8, 1982, Pages 2021-2025

Ferdinand Bohlmann, Christa Zdero, Robert M. King, Harold Robinson



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Abstract

The investigation of Stevia myriadenia afforded in addition to known compounds a new clerodane and a labdane derivative, two guaianolides, a bisabolene and a germacrene derivative. The structures were elucidated by spectroscopic methods. The chemotaxonomic situation is discussed briefly.



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Steroidal saponins of Asparagus adscendens

Phytochemistry, Volume 21, Issue 8, 1982, Pages 2075-2078

S. C. Sharma, R. Chand, O. P. Sati



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Abstract

From the methanol extract of the fruits of Asparagus adscendens sitosterol-β--glucoside, two spirostanol glycosides (asparanin A and B) and two furostanol glycosides (asparoside A and B) were isolated and characterized as 3-O-[β--glucopyranosyl (1→2)-β--glucopyranosyl]-(25S)-5β-spirostan-3β-ol, 3-O-{[β--glucopyranosyl(1→2)][α--rhamnopyranosyl(1→4)]-β--glucopyranosyl}-(25S)-5β-spirostan-3β-ol,3-O-{[β--glucopyranosyl(1→2)][α--rhamnopyranosyl(1→4)]-β--glucopyranosyl} -26-O-(β- -glucopyranosyl)-22α-methoxy-(25S)-5β-furostan-3β,26-diol and 3-O-{[β--glucopyranosyl(1→2)][α--rhamnopyranosyl(1→4)]-β--glucopyranosyl}-26-O-(β--glucopyranosyl)- 25S)-5β-furostan-3β,22α, 26-triol, respectively.


475. Chemical investigations of herbarium material for alkaloids



Phytochemistry, Volume 21, Issue 10, 1982, Pages 2441-2456

J. David Phillipson



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Abstract

The chemical and biological screening of plants is reviewed briefly as an introduction to the concept of the use of herbarium material for investigations into the chemical constituents of plants. Such materials have been examined for a wide range of chemicals, and in particular, examples of the extraction of alkaloids from species of Rubiaceae and Papaveraceae are discussed. The present state of the art of such physical techniques as mass and nuclear magnetic resonance spectrometry for these investigations is commented upon and the plea is made that, wherever possible, wider use be made of herbarium material for chemical studies.


476. 1-β-vicianosyl-(S)-2-methylbutyrate, a 1-O-acylglycoside from Acacia sieberana var. Woodii



Phytochemistry, Volume 21, Issue 11, 1982, Pages 2683-2685

S. Brøgger Christensen, Leon Brimer, Frederick Nartey



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