S
Sławomir Wybraniec
Researcher at Ben-Gurion University of the Negev
Publications - 73
Citations - 2013
Sławomir Wybraniec is an academic researcher from Ben-Gurion University of the Negev. The author has contributed to research in topics: Betacyanins & Betanin. The author has an hindex of 21, co-authored 65 publications receiving 1649 citations.
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Journal ArticleDOI
Betalainic and nutritional profiles of pigment-enriched red beet root (Beta vulgaris L.) dried extracts
Boris Nemzer,Zbigniew Pietrzkowski,Aneta Spórna,Paweł Stalica,Wayne Thresher,Tadeusz Michałowski,Sławomir Wybraniec +6 more
TL;DR: In this paper, a chromatographic study on betalains and their degradation derivatives analysed by LC-DAD-ESI-MS/MS was performed, where the principal betanin/isobetanin pigments comprised a major portion of the total betalain content.
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An Overview of the Kjeldahl Method of Nitrogen Determination. Part II. Sample Preparation, Working Scale, Instrumental Finish, and Quality Control
TL;DR: The Kjeldahl method was introduced in 1883 and consists of three main steps: sample digestion, distillation, and ammonia determination (titration being the primary method) as discussed by the authors.
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An Overview of the Kjeldahl Method of Nitrogen Determination. Part I. Early History, Chemistry of the Procedure, and Titrimetric Finish
TL;DR: The use of a catalyst in Kjeldahl digestion accelerates oxidation and completes the digestion to allow the subsequent determination of nitrogen, which has become a classical measurement in analytical chemistry and has been used extensively over the past 130 years as mentioned in this paper.
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Fruit flesh betacyanin pigments in hylocereus cacti.
Sławomir Wybraniec,Yosef Mizrahi +1 more
TL;DR: Fruits of H. polyrhizus exhibited the highest relative concentration (expressed as percentage of the total HPLC peak area) of hylocerenin, a recently discovered pigment, and a high relative concentration of phyllocactin, which might explain the differences in red hues of the flesh of these fruits.
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Betacyanins from vine cactus Hylocereus polyrhizus.
Sławomir Wybraniec,Itzhak Platzner,Shimona Geresh,Hugo E. Gottlieb,Marcela Haimberg,Michael Mogilnitzki,Yosef Mizrahi +6 more
TL;DR: A new betacyanin was structurally elucidated as betanidin 5-O-[6'-O-(3"-hydroxy-3"-methyl-glutaryl)-beta-D-glucopyranoside] (proposed trivial name hylocerenin) by means of electrospray MS/MS, HPLC, and NMR techniques.