Results 221 to 230 of about 6,337 (246)

Diversity-Oriented Synthesis of Steviol Glycosides

The Journal of Organic Chemistry, 2018
With cheap and easily available mixtures of steviol glycosides as starting materials, a practical method for steviol acquisition has been developed, on the basis of which a facile, diversity-oriented, and economic protocol for the synthesis of structurally defined steviol glycosides was established.
Zhi Qiao, Hui Liu, Jing-Jing Sui, Jin-Xi Liao, Yuan-Hong Tu, Richard R. Schmidt, Jian-Song Sun   +6 more
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Steviol and Steviol-Glycoside: Glucosyltransferase Activities in Stevia rebaudiana Bertoni - Purification and Partial Characterization

Archives of Biochemistry and Biophysics, 1995
The leaves of Stevia rebaudiana Bertoni contain sweet compounds which are glycosides of diterpene derivative steviol (ent-13-hydroxykaur-16-en-19-oic acid). Its main constituents are stevioside (triglucosylated steviol; 13-O-beta-sophorosyl-19-O-beta-glucosyl-steviol) and rebaudioside-A (tetraglucosylated steviol; 2'-O-beta-glucosyl-13-O-beta ...
H, Shibata, Y, Sawa, T, Oka, S, Sonoke, K K, Kim, M, Yoshioka   +5 more
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Production of steviol from steviol glucosides using β-glucosidase from a commercial pectinase, Sumizyme PX

Biotechnology Letters, 2017
To purify and characterize a specific enzyme from a commercial pectinase for the production of steviol from stevioside (Ste) without adding organic solvent and to improve steviol production.Commercial Sumizyme PX converted Ste to steviol with a yield of 98%. β-Glucosidase from Sumizyme PX (βglyPX) was purified in three steps with 12.5-fold purification
Thi Thanh Hanh Nguyen, Changseop Seo, Bon-Cheol Gu, Hee-Jung Lim, Jung-Min Ha, Seong-Bo Kim, Jun-Seong Park, Doman Kim   +7 more
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Identification of Steviol Glucuronide in Human Urine

Journal of Agricultural and Food Chemistry, 2006
Stevioside (250 mg capsules) was given three times daily to 10 healthy subjects. Steviol glucuronide (steviol 19-O-beta-D-glucopyranosiduronic acid; MM, 494.58; melting point, 198-199 degrees C) was characterized in the 24 h urine as the only excretion product of oral stevioside by MS, NMR, IR, and UV spectroscopy.
Jan M C, Geuns, Johan, Buyse, Annelies, Vankeirsbilck, Elisabeth H M, Temme, Frans, Compernolle, Suzanne, Toppet   +5 more
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A critical review of the genetic toxicity of steviol and steviol glycosides

Food and Chemical Toxicology, 2008
Extracts of the leaves of the stevia plant (Stevia rebaudiana Bertoni) are used to sweeten food and beverages in South America, Japan and China. The components responsible for the sweet properties of the plant are glycosides of steviol, primary stevioside (ent-13-hydroxykaur-16-en-18-oic acid), which is 250-300 times sweeter than sucrose and ...
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Biosynthesis of steviol from (−)-kaurene

Phytochemistry, 1967
Abstract (−)-Kaurene-17-14C was administered to the leaves of a Stevia rebaudiana plant, and radioactive steviol was isolated by extraction, hydrolysis, and chromatography. Its radiochemical purity was demonstrated by dilution with carrier material, recrystallization to constant specificactivity, conversion to the methyl ester, and recrystallization.
Raymond D. Bennett, Ellen Ruth Lieber, Erich Heftmann   +2 more
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ChemInform Abstract: SYNTH. FUER STEVIOL

Chemischer Informationsdienst. Organische Chemie, 1970
AbstractAus der Säure (Ia) wird über verschiedene Zwischenstufen wie (II) und (III) Steviol (IV) hergestellt.
I. F. COOK, J. R. KNOX
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Steviol Glycosides: Chemical Diversity, Metabolism, and Function

Journal of Natural Products, 2013
Steviol glycosides are a group of highly sweet diterpene glycosides discovered in only a few plant species, most notably the Paraguayan shrub Stevia rebaudiana. During the past few decades, the nutritional and pharmacological benefits of these secondary metabolites have become increasingly apparent.
Stijn, Ceunen, Jan M C, Geuns
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Characterization of a novel steviol-producing β-glucosidase from Penicillium decumbens and optimal production of the steviol

Applied Microbiology and Biotechnology, 2013
This study aimed to develop an economically viable enzyme for the optimal production of steviol (S) from stevioside (ST). Of 9 commercially available glycosidases tested, S-producing β-glucosidase (SPGase) was selected and purified 74-fold from Penicillium decumbens naringinase by a three-step column chromatography procedure.
Jin-A, Ko, Young Bae, Ryu, Hyun-Jun, Kwon, Hyung Jae, Jeong, Su-Jin, Park, Cha Young, Kim, Young-Jung, Wee, Doman, Kim, Woo Song, Lee, Young-Min, Kim   +9 more
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ChemInform Abstract: TOTALSYNTH. VON (+‐)‐STEVIOL

Chemischer Informationsdienst. Organische Chemie, 1970
AbstractDie Synthese von (i)‐Stevio1 (III) aus dem Aldehyd (I) über u.a. die Zwischenstufe (II) wird beschrieben.
K. MORI, Y. NAKAHARA, M. MATSUI
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