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

Viraragavan A, Hlengwa N, de Beer D, Riedel S, Miller N, Bowles S, Walczak B, Muller C, Joubert E.

Food Funct. 2020 Mar 20. doi: 10.1039/c9fo02480h. [Epub ahead of print]


Development of chemical-based reference standards for rooibos and honeybush aroma lexicons.

du Preez BVP, de Beer D, Moelich EI, Muller M, Joubert E.

Food Res Int. 2020 Jan;127:108734. doi: 10.1016/j.foodres.2019.108734. Epub 2019 Oct 8.


Evaluation of emissions and exposures at workplaces using desktop 3-dimensional printer.

Stefaniak AB, Johnson AR, du Preez S, Hammond DR, Wells JR, Ham JE, LeBouf RF, Menchaca KW, Martin SB Jr, Duling MG, Bowers LN, Knepp AK, Su FC, de Beer DJ, du Plessis JL.

J Chem Health Saf. 2019 Mar;26(2):19-30. doi: 10.1016/j.jchas.2018.11.001.


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

Damiani E, Carloni P, Rocchetti G, Senizza B, Tiano L, Joubert E, de Beer D, Lucini L.

Antioxidants (Basel). 2019 Oct 21;8(10). pii: E499. doi: 10.3390/antiox8100499.


Potential of benzophenones and flavanones to modulate the bitter intensity of Cyclopia genistoides herbal tea.

Alexander L, de Beer D, Muller M, van der Rijst M, Joubert E.

Food Res Int. 2019 Nov;125:108519. doi: 10.1016/j.foodres.2019.108519. Epub 2019 Jun 24.


Colonies of marine cyanobacteria Trichodesmium interact with associated bacteria to acquire iron from dust.

Basu S, Gledhill M, de Beer D, Prabhu Matondkar SG, Shaked Y.

Commun Biol. 2019 Aug 2;2:284. doi: 10.1038/s42003-019-0534-z. eCollection 2019.


Hydrogen Dynamics in Trichodesmium Colonies and Their Potential Role in Mineral Iron Acquisition.

Eichner M, Basu S, Gledhill M, de Beer D, Shaked Y.

Front Microbiol. 2019 Jul 10;10:1565. doi: 10.3389/fmicb.2019.01565. eCollection 2019.


Insights Into Emissions and Exposures From Use of Industrial-Scale Additive Manufacturing Machines.

Stefaniak AB, Johnson AR, du Preez S, Hammond DR, Wells JR, Ham JE, LeBouf RF, Martin SB Jr, Duling MG, Bowers LN, Knepp AK, de Beer DJ, du Plessis JL.

Saf Health Work. 2019 Jun;10(2):229-236. doi: 10.1016/ Epub 2018 Nov 9.


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

De Beer D, Tobin J, Walczak B, Van Der Rijst M, Joubert E.

Food Res Int. 2019 Jul;121:185-196. doi: 10.1016/j.foodres.2019.03.041. Epub 2019 Mar 19.


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

Miller N, Bosman SC, Malherbe CJ, De Beer D, Joubert E.

Food Chem. 2019 Sep 15;292:121-128. doi: 10.1016/j.foodchem.2019.04.047. Epub 2019 Apr 12.


Working with log-ratios.

Malyjurek Z, de Beer D, Joubert E, Walczak B.

Anal Chim Acta. 2019 Jun 20;1059:16-27. doi: 10.1016/j.aca.2019.01.041. Epub 2019 Feb 2.


Full in vivo characterization of carbonate chemistry at the site of calcification in corals.

Sevilgen DS, Venn AA, Hu MY, Tambutté E, de Beer D, Planas-Bielsa V, Tambutté S.

Sci Adv. 2019 Jan 16;5(1):eaau7447. doi: 10.1126/sciadv.aau7447. eCollection 2019 Jan.


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.

Sishi M, Muller M, de Beer D, van der Rijst M, Joubert E.

J Sci Food Agric. 2019 May;99(7):3653-3661. doi: 10.1002/jsfa.9587. Epub 2019 Mar 6.


Creation of an Enhanced Recovery After Surgery (ERAS) Guideline for neonatal intestinal surgery patients: a knowledge synthesis and consensus generation approach and protocol study.

Gibb ACN, Crosby MA, McDiarmid C, Urban D, Lam JYK, Wales PW, Brockel M, Raval M, Offringa M, Skarsgard ED, Wester T, Wong K, de Beer D, Nelson G, Brindle ME.

BMJ Open. 2018 Dec 9;8(12):e023651. doi: 10.1136/bmjopen-2018-023651. Review.


N2 fixation in free-floating filaments of Trichodesmium is higher than in transiently suboxic colony microenvironments.

Eichner M, Thoms S, Rost B, Mohr W, Ahmerkamp S, Ploug H, Kuypers MMM, de Beer D.

New Phytol. 2019 Apr;222(2):852-863. doi: 10.1111/nph.15621. Epub 2018 Dec 29.


Bitter Taste Impact and Thermal Conversion of a Naringenin Glycoside from Cyclopia genistoides.

Danton O, Alexander L, Hunlun C, de Beer D, Hamburger M, Joubert E.

J Nat Prod. 2018 Dec 28;81(12):2743-2749. doi: 10.1021/acs.jnatprod.8b00710. Epub 2018 Dec 4.


In Silico Screening of Comprehensive Two-Dimensional Centrifugal Partition Chromatography × Liquid Chromatography for Multiple Compound Isolation.

Marlot L, Batteau M, De Beer D, Faure K.

Anal Chem. 2018 Dec 18;90(24):14279-14286. doi: 10.1021/acs.analchem.8b03440. Epub 2018 Nov 29.


Bitter profiling of phenolic fractions of green Cyclopia genistoides herbal tea.

Alexander L, de Beer D, Muller M, van der Rijst M, Joubert E.

Food Chem. 2019 Mar 15;276:626-635. doi: 10.1016/j.foodchem.2018.10.030. Epub 2018 Oct 6.


Electrospraying as a suitable method for nanoencapsulation of the hydrophilic bioactive dihydrochalcone, aspalathin.

Human C, De Beer D, Van Der Rijst M, Aucamp M, Joubert E.

Food Chem. 2019 Mar 15;276:467-474. doi: 10.1016/j.foodchem.2018.10.016. Epub 2018 Oct 4.


Role of Extracellular Carbonic Anhydrase in Dissolved Inorganic Carbon Uptake in Alkaliphilic Phototrophic Biofilm.

Li T, Sharp CE, Ataeian M, Strous M, de Beer D.

Front Microbiol. 2018 Oct 22;9:2490. doi: 10.3389/fmicb.2018.02490. eCollection 2018.


Arctic Coralline Algae Elevate Surface pH and Carbonate in the Dark.

Hofmann LC, Schoenrock K, de Beer D.

Front Plant Sci. 2018 Sep 25;9:1416. doi: 10.3389/fpls.2018.01416. eCollection 2018.


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

Alexander L, de Beer D, Muller M, van der Rijst M, Joubert E.

J Sci Food Agric. 2019 Feb;99(3):1334-1341. doi: 10.1002/jsfa.9308. Epub 2018 Oct 16.


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

Hunlun C, de Beer D, Sigge GO, Van Wyk J.

J Sci Food Agric. 2019 Feb;99(3):1029-1037. doi: 10.1002/jsfa.9267. Epub 2018 Sep 10.


Chemoprevention of LA7-Induced Mammary Tumor Growth by SM6Met, a Well-Characterized Cyclopia Extract.

Oyenihi OR, Krygsman A, Verhoog N, de Beer D, Saayman MJ, Mouton TM, Louw A.

Front Pharmacol. 2018 Jun 20;9:650. doi: 10.3389/fphar.2018.00650. eCollection 2018.


Filamentous Giant Beggiatoaceae from the Guaymas Basin Are Capable of both Denitrification and Dissimilatory Nitrate Reduction to Ammonium.

Schutte CA, Teske A, MacGregor BJ, Salman-Carvalho V, Lavik G, Hach P, de Beer D.

Appl Environ Microbiol. 2018 Jul 17;84(15). pii: e02860-17. doi: 10.1128/AEM.02860-17. Print 2018 Aug 1.


Low-Light Anoxygenic Photosynthesis and Fe-S-Biogeochemistry in a Microbial Mat.

Haas S, de Beer D, Klatt JM, Fink A, Rench RM, Hamilton TL, Meyer V, Kakuk B, Macalady JL.

Front Microbiol. 2018 Apr 27;9:858. doi: 10.3389/fmicb.2018.00858. eCollection 2018.


CO2 leakage alters biogeochemical and ecological functions of submarine sands.

Molari M, Guilini K, Lott C, Weber M, de Beer D, Meyer S, Ramette A, Wegener G, Wenzhöfer F, Martin D, Cibic T, De Vittor C, Vanreusel A, Boetius A.

Sci Adv. 2018 Feb 7;4(2):eaao2040. doi: 10.1126/sciadv.aao2040. eCollection 2018 Feb.


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.

Beelders T, de Beer D, Kidd M, Joubert E.

Food Res Int. 2018 Jan;103:103-109. doi: 10.1016/j.foodres.2017.10.020. Epub 2017 Oct 14.


Cyanobacterial photosynthesis under sulfidic conditions: insights from the isolate Leptolyngbya sp. strain hensonii.

Hamilton TL, Klatt JM, de Beer D, Macalady JL.

ISME J. 2018 Feb;12(2):568-584. doi: 10.1038/ismej.2017.193. Epub 2018 Jan 12.


The microbial community of a biofilm contact reactor for the treatment of winery wastewater.

de Beer DM, Botes M, Cloete TE.

J Appl Microbiol. 2018 Feb;124(2):598-610. doi: 10.1111/jam.13654. Epub 2018 Jan 15.


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

de Beer D, Pauck CE, Aucamp M, Liebenberg W, Stieger N, van der Rijst M, Joubert E.

J Sci Food Agric. 2018 Jun;98(8):2925-2934. doi: 10.1002/jsfa.8787. Epub 2018 Jan 30.


Untargeted analysis of chromatographic data for green and fermented rooibos: Problem with size effect removal.

Tobin J, Walach J, de Beer D, Williams PJ, Filzmoser P, Walczak B.

J Chromatogr A. 2017 Nov 24;1525:109-115. doi: 10.1016/j.chroma.2017.10.024. Epub 2017 Oct 9.


Polyphenol-Enriched Fractions of Cyclopia intermedia Selectively Affect Lipogenesis and Lipolysis in 3T3-L1 Adipocytes.

Jack BU, Malherbe CJ, Willenburg EL, de Beer D, Huisamen B, Joubert E, Muller CJF, Louw J, Pheiffer C.

Planta Med. 2018 Jan;84(2):100-110. doi: 10.1055/s-0043-119463. Epub 2017 Sep 22.


Effects of suspended sediments and nutrient enrichment on juvenile corals.

Humanes A, Fink A, Willis BL, Fabricius KE, de Beer D, Negri AP.

Mar Pollut Bull. 2017 Dec 15;125(1-2):166-175. doi: 10.1016/j.marpolbul.2017.08.003. Epub 2017 Aug 14.


Ten years of simulation-based training in pediatric anesthesia: The inception, evolution, and dissemination of the Managing Emergencies in Pediatric Anesthesia (MEPA) course.

Everett TC, MacKinnon R, de Beer D, Taylor M, Bould MD.

Paediatr Anaesth. 2017 Oct;27(10):984-990. doi: 10.1111/pan.13224. Epub 2017 Aug 17. Review.


Response of Posidonia oceanica seagrass and its epibiont communities to ocean acidification.

Guilini K, Weber M, de Beer D, Schneider M, Molari M, Lott C, Bodnar W, Mascart T, De Troch M, Vanreusel A.

PLoS One. 2017 Aug 9;12(8):e0181531. doi: 10.1371/journal.pone.0181531. eCollection 2017.


A diver-operated hyperspectral imaging and topographic surveying system for automated mapping of benthic habitats.

Chennu A, Färber P, De'ath G, de Beer D, Fabricius KE.

Sci Rep. 2017 Aug 2;7(1):7122. doi: 10.1038/s41598-017-07337-y.


Evidence for fungal and chemodenitrification based N2O flux from nitrogen impacted coastal sediments.

Wankel SD, Ziebis W, Buchwald C, Charoenpong C, de Beer D, Dentinger J, Xu Z, Zengler K.

Nat Commun. 2017 Jun 5;8:15595. doi: 10.1038/ncomms15595.


Thermal stability of the functional ingredients, glucosylated benzophenones and xanthones of honeybush (Cyclopia genistoides), in an aqueous model solution.

Beelders T, de Beer D, Ferreira D, Kidd M, Joubert E.

Food Chem. 2017 Oct 15;233:412-421. doi: 10.1016/j.foodchem.2017.04.083. Epub 2017 Apr 17.


Minimising variation in aspalathin content of aqueous green rooibos extract: optimising extraction and identifying critical material attributes.

Miller N, De Beer D, Joubert E.

J Sci Food Agric. 2017 Nov;97(14):4937-4942. doi: 10.1002/jsfa.8370. Epub 2017 Jun 27.


Intestinal Transport Characteristics and Metabolism of C-Glucosyl Dihydrochalcone, Aspalathin.

Bowles S, Joubert E, de Beer D, Louw J, Brunschwig C, Njoroge M, Lawrence N, Wiesner L, Chibale K, Muller C.

Molecules. 2017 Mar 30;22(4). pii: E554. doi: 10.3390/molecules22040554.


Phenolic profiling of rooibos using off-line comprehensive normal phase countercurrent chromatography×reversed phase liquid chromatography.

Walters NA, de Villiers A, Joubert E, de Beer D.

J Chromatogr A. 2017 Mar 24;1490:102-114. doi: 10.1016/j.chroma.2017.02.021. Epub 2017 Feb 14.


Multivariate analysis of variance of designed chromatographic data. A case study involving fermentation of rooibos tea.

Marini F, de Beer D, Walters NA, de Villiers A, Joubert E, Walczak B.

J Chromatogr A. 2017 Mar 17;1489:115-125. doi: 10.1016/j.chroma.2017.02.007. Epub 2017 Feb 4.


Oxygenic and anoxygenic photosynthesis in a microbial mat from an anoxic and sulfidic spring.

de Beer D, Weber M, Chennu A, Hamilton T, Lott C, Macalady J, M Klatt J.

Environ Microbiol. 2017 Mar;19(3):1251-1265. doi: 10.1111/1462-2920.13654. Epub 2017 Feb 20.


Cyanobacteria in Sulfidic Spring Microbial Mats Can Perform Oxygenic and Anoxygenic Photosynthesis Simultaneously during an Entire Diurnal Period.

Klatt JM, de Beer D, Häusler S, Polerecky L.

Front Microbiol. 2016 Dec 15;7:1973. doi: 10.3389/fmicb.2016.01973. eCollection 2016.


The Universal Anaesthesia Machine (UAM): assessment of a new anaesthesia workstation built with global health in mind.

de Beer DA, Nesbitt FD, Bell GT, Rapuleng A.

Anaesthesia. 2017 Apr;72(4):444-451. doi: 10.1111/anae.13752. Epub 2016 Dec 8.


Evaluation of capillary electrophoresis for the analysis of rooibos and honeybush tea phenolics.

Arries WJ, Tredoux AG, de Beer D, Joubert E, de Villiers A.

Electrophoresis. 2017 Mar;38(6):897-905. doi: 10.1002/elps.201600349. Epub 2016 Dec 27.


The potential role of polyphenols in the modulation of skin cell viability by Aspalathus linearis and Cyclopia spp. herbal tea extracts in vitro.

Magcwebeba TU, Riedel S, Swanevelder S, Swart P, De Beer D, Joubert E, Andreas Gelderblom WC.

J Pharm Pharmacol. 2016 Nov;68(11):1440-1453. doi: 10.1111/jphp.12629. Epub 2016 Sep 27.


Evidence for water-mediated mechanisms in coral-algal interactions.

Jorissen H, Skinner C, Osinga R, de Beer D, Nugues MM.

Proc Biol Sci. 2016 Aug 17;283(1836). pii: 20161137. doi: 10.1098/rspb.2016.1137.

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