Phytochemical Analysis

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A bioautographic agar overlay method for the detection of antifungal compounds from higher plants
Phytochemical Analysis - Tập 2 Số 5 - Trang 199-203 - 1991
Lila Rahalison, Matthias Hamburger, Kurt Hostettmann, Michel Monod, E. Frenk
AbstractA simple bioautographic agar overlay assay using Candida albicans as the indicator organism for the detection and activity‐guided fractionation of antifungal compounds by thin layer chromatography has been developed. Inhibition of fungal growth was assessed by the detection of dehydrogenase activity with thiazolyl blue (methylthia...... hiện toàn bộ
One‐step Separation and Purification of Three Lignans and One Flavonol from Sinopodophyllum emodi by Medium‐pressure Liquid Chromatography and High‐speed Counter‐current Chromatography
Phytochemical Analysis - Tập 24 Số 6 - Trang 603-607 - 2013
Ping Wang, Yongling Liu, Tao Chen, Wenhua Xu, Jinmao You, Yongjun Liu, Yulin Li
ABSTRACTIntroductionLignans and flavonols are the primary constituents of Sinopodophyllum emodi and have been used as cathartic, anthelmintic, chemotherapeutic and anti‐hypertensive compounds. Although these compounds have been isolated, there have been no reports on the separation of 4′‐demethyl podophy...... hiện toàn bộ
Determination of Endogenous Brassinosteroids in Plant Tissues Using Solid‐phase Extraction with Double Layered Cartridge Followed by High‐performance Liquid Chromatography–Tandem Mass Spectrometry
Phytochemical Analysis - Tập 24 Số 4 - Trang 386-394 - 2013
Jun Ding, Lijing Mao, Shao‐Ting Wang, Bi‐Feng Yuan, Yu‐Qi Feng
ABSTRACTIntroductionBrassinosteroids (BRs) are a group of important phytohormones that play vital roles in plant growth, development and a series of physiological phenomena. In order to understand biosynthesis, degradation and metabolic pathways of BRs, a reliable analytical method of BRs with effective sample pre‐treatment proces...... hiện toàn bộ
An efficient microwave‐assisted extraction process of stevioside and rebaudioside‐A from Stevia rebaudiana (Bertoni)
Phytochemical Analysis - Tập 20 Số 3 - Trang 240-245 - 2009
Vikas Jaitak, Bikram Singh Bandna, Vijay Kumar Kaul
AbstractIntroductionStevioside and rebaudioside‐A are major low‐calorie diterpene steviol glycosides in the leaves of Stevia rebaudiana. They are widely used as natural sweeteners for diabetic patients, but the long extraction procedures required and the optimisation of product yield present challenging ...... hiện toàn bộ
Analysis of Cleistopholis patens Leaf and Trunk Bark Oils Using Combined GC‐ Flame Ionisation Detection, GC‐Retention Index, GC–MS and 13C‐NMR
Phytochemical Analysis - Tập 24 Số 6 - Trang 574-580 - 2013
Zana Adama Ouattara, Jean Brice Boti, Antoine Coffy Ahibo, Joseph Casanova, Félix Tomi, Ange Bighelli
ABSTRACTIntroductionGermacrenes A–C are secondary metabolites produced by various plants. They are sesquiterpene hydrocarbons bearing the (E,E)‐1,5‐cyclodecadiene structure known to undergo thermal rearrangement through a [3.3]‐sigmatropic reaction. Such a rearrangement was evi...... hiện toàn bộ
Screening of Plant Extracts for Antioxidant Activity: a Comparative Study on Three Testing Methods
Phytochemical Analysis - Tập 13 Số 1 - Trang 8-17 - 2002
Irina Koleva, Teris A. van Beek, J.P.H. Linssen, C.P.G.M. de Groot, L. Evstatieva
AbstractThree methods widely employed in the evaluation of antioxidant activity, namely 2,2′‐diphenyl‐1‐picrylhydrazyl (DPPH) radical scavenging method, static headspace gas chromatography (HS‐GC) and β‐carotene bleaching test (BCBT), have been compared with regard to their application in the screening of plant extracts. The strengths and limitations of each method...... hiện toàn bộ
Analysis of secondary metabolites from Lichen by high performance liquid chromatography with a photodiode array detector
Phytochemical Analysis - Tập 5 Số 4 - Trang 197-205 - 1994
Isao Yoshimura, Yasuhiro Kinoshita, Yoshikazu Yamamoto, Siegfried Huneck, Yasuyuki Yamada
AbstractSecondary metabolites from Lichen, mainly phenolic compounds, have been analysed and identified using high performance liquid chromatography with a photodiode array detector. Components of lichen thalli were detected by characteristic ultraviolet spectra and relative retention times. Some new minor components have been found in several lichens.
Analysis of Eleven Phenolic Compounds Including Novel p‐Coumaroyl Derivatives in Lettuce (Lactuca sativa L.) by Ultra‐high‐performance Liquid Chromatography with Photodiode Array and Mass Spectrometry Detection
Phytochemical Analysis - Tập 22 Số 6 - Trang 555-563 - 2011
Albert Ibarz Ribas, Marta Gratacós-Cubarsí, Carmen Sárraga, José‐Antonio García‐Regueiro, Massimo Castellari
ABSTRACTIntroductionLettuce is a widely consumed vegetable and a good source of phenolic compounds. Several factors (genetic, agronomical and environmental) can influence the lettuce composition; their effects are not completely defined and more studies are needed on this topic.Objective... hiện toàn bộ
Supercritical CO2Extraction ofLavandula angustifoliaMill. Flowers: Optimisation of Oxygenated Monoterpenes, Coumarin and Herniarin Content
Phytochemical Analysis - Tập 28 Số 6 - Trang 558-566 - 2017
Igor Jerković, Maja Molnar, Senka Vidović, Jelena Vladić, Stela Jokić
Analysis of Rhizoma Polygoni Cuspidati by HPLC and HPLC‐ESI/MS
Phytochemical Analysis - Tập 18 Số 5 - Trang 387-392 - 2007
Tao Yi, Hao Zhang, Zongwei Cai
AbstractAn HPLC method with photodiode array detection (PAD) and ESI/MS detection was developed for the qualitative and quantitative analysis of the major chemical constituents of the dried rhizome of Polygonum cuspidatum Sieb. et Zucc. (Rhizoma Polygoni Cuspidati; Chinese name Hu‐Zhang). Based on the chromatogr...... hiện toàn bộ
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