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List of works by Dalene De Beer

A new concept for variance analysis of hyphenated chromatographic data avoiding signal warping ⬇️

scientific article published on March 27, 2013

A toxicological assessment of Athrixia phylicoides aqueous extract following sub-chronic ingestion in a rat model.

scientific article published in November 2008

Acute assessment of an aspalathin-enriched green rooibos (Aspalathus linearis) extract with hypoglycemic potential.

scientific article

Amelioration of palmitate-induced insulin resistance in C₂C₁₂ muscle cells by rooibos (Aspalathus linearis).

scientific article published on 29 April 2013

An in vitro assessment of the effect of Athrixia phylicoides DC. aqueous extract on glucose metabolism.

scientific article published on 18 April 2012

Antioxidant activity of South African red and white cultivar wines: free radical scavenging

scientific article

Bitter profiling of phenolic fractions of green Cyclopia genistoides herbal tea

article by Lara Alexander et al published 15 March 2019 in Food Chemistry

Characterisation of phenolic compounds in South African plum fruits (Prunus salicina Lindl.) using HPLC coupled with diode-array, fluorescence, mass spectrometry and on-line antioxidant detection.

scientific article published on 2 May 2013

Comprehensive off-line CCC × LC-DAD-MS separation of Cyclopia pubescens Eckl. & Zeyh. phenolic compounds and structural elucidation of isolated compounds

scientific article published on 17 August 2020

Comprehensive two-dimensional liquid chromatographic analysis of rooibos (Aspalathus linearis) phenolics

article

Development of On-Line High Performance Liquid Chromatography (HPLC)-Biochemical Detection Methods as Tools in the Identification of Bioactives ⬇️

scientific article published on 07 March 2012

Effect of heat on aspalathin, iso-orientin, and orientin contents and color of fermented rooibos (Aspalathus linearis) iced tea.

scientific article published on 10 April 2009

Effect of pre-drying treatments and storage on color and phenolic composition of green honeybush (Cyclopia subternata) herbal tea.

scientific article published in January 2010

Effect of species variation and processing on phenolic composition and in vitro antioxidant activity of aqueous extracts of Cyclopia spp. (Honeybush Tea).

scientific article

Effects of fermented rooibos (Aspalathus linearis) on adipocyte differentiation

scientific article published on 21 September 2013

Enhancing aspalathin stability in rooibos (Aspalathus linearis) ready-to-drink iced teas during storage: the role of nano-emulsification and beverage ingredients, citric and ascorbic acids

scientific article published on 21 July 2011

Enhancing the polyphenol content of a red-fleshed Japanese plum (Prunus salicina Lindl.) nectar by incorporating a polyphenol-rich extract from the skins

scientific article published on 23 April 2012

Food ingredient extracts of Cyclopia subternata (Honeybush): variation in phenolic composition and antioxidant capacity.

scientific article published on 7 December 2012

High-dimensional nested analysis of variance to assess the effect of production season, quality grade and steam pasteurization on the phenolic composition of fermented rooibos herbal tea.

scientific article published on 25 June 2013

Honeybush Extracts (Cyclopia spp.) Rescue Mitochondrial Functions and Bioenergetics against Oxidative Injury

scientific article published on 07 August 2020

Impact of Cold versus Hot Brewing on the Phenolic Profile and Antioxidant Capacity of Rooibos (Aspalathus linearis) Herbal Tea

scientific article published on 21 October 2019

Impact of steam treatment on shelf-life stability of a xanthone-rich green herbal tea (Cyclopia maculata Andrews Kies) - identifying quality changes during storage

scientific article published on 16 October 2018

In vitro hepatic biotransformation of aspalathin and nothofagin, dihydrochalcones of rooibos (Aspalathus linearis), and assessment of metabolite antioxidant activity

scientific article published in February 2010

Inulin as microencapsulating agent improves physicochemical properties of spray-dried aspalathin-rich green rooibos (Aspalathus linearis) extract with α-glucosidase inhibitory activity

Iriflophenone-3-C-glucoside from Cyclopia genistoides: Isolation and quantitative comparison of antioxidant capacity with mangiferin and isomangiferin using on-line HPLC antioxidant assays

scientific article published on 02 February 2014

Isolation of aspalathin and nothofagin from rooibos (Aspalathus linearis) using high-performance countercurrent chromatography: sample loading and compound stability considerations

scientific article published on 7 January 2015

Isolation of isomangiferin from honeybush (Cyclopia subternata) using high-speed counter-current chromatography and high-performance liquid chromatography ⬇️

scientific article

Kinetic optimisation of the reversed phase liquid chromatographic separation of rooibos tea (Aspalathus linearis) phenolics on conventional high performance liquid chromatographic instrumentation

scientific article published on 12 November 2011

Mangiferin glucuronidation: Important hepatic modulation of antioxidant activity

scientific article published on 25 November 2011

Membrane selection and optimisation of tangential flow ultrafiltration of Cyclopia genistoides extract for benzophenone and xanthone enrichment

scientific article published on 12 April 2019

Model development for predicting in vitro bio-capacity of green rooibos extract based on composition for application as screening tool in quality control

scientific article published on 20 March 2020

Modeling of thermal degradation kinetics of the C-glucosyl xanthone mangiferin in an aqueous model solution as a function of pH and temperature and protective effect of honeybush extract matrix

scientific article published on 14 October 2017

Occurrence and sensory perception of Z-2-(β-d-glucopyranosyloxy)-3-phenylpropenoic acid in rooibos (Aspalathus linearis).

scientific article

Phenolic and physicochemical stability of a functional beverage powder mixture during storage: effect of the microencapsulant inulin and food ingredients.

scientific article published on 23 November 2017

Phenolic composition and total antioxidant capacity of South African frozen concentrated orange juice as affected by varietal, seasonal and regional differences

article

Phenolic composition of rooibos changes during simulated fermentation: Effect of endogenous enzymes and fermentation temperature on reaction kinetics

scientific article published on 19 March 2019

Phenylethanoid glycosides as major antioxidants in Lippia multiflora herbal infusion and their stability during steam pasteurisation of plant material

article

Rooibos agro-processing waste as herbal tea products: optimisation of soluble solids extraction from dust and application to improve sensory profile, colour and flavonoid content of stem infusions

scientific article published on 06 March 2019

The road to commercialisation of an unutilised Cyclopia species for herbal tea production – the case of Cyclopia pubescens

scientific article published in 2022

Unravelling the Total Antioxidant Capacity of Pinotage Wines: Contribution of Phenolic Compounds

scientific article published on 01 April 2006

Use of countercurrent chromatography during isolation of 6-hydroxyluteolin-7-O-β-glucoside, a major antioxidant of Athrixia phylicoides

scientific article published on 29 December 2010

Use of green rooibos (Aspalathus linearis) extract and water-soluble nanomicelles of green rooibos extract encapsulated with ascorbic acid for enhanced aspalathin content in ready-to-drink iced teas

scientific article

Variation in phenolic content and antioxidant activity of fermented rooibos herbal tea infusions: role of production season and quality grade

scientific article published on 4 September 2012

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