Maldi-ToF analysis and FTIR characterization of Aucoumea klaineana Pierre (Okoume) sapwood and heartwood condensed tannins from Gabon’s natural forest

2020 ◽  
Vol 54 (4) ◽  
pp. 907-928
Author(s):  
Starlin Peguy Engozogho Anris ◽  
Arsene Bikoro Bi Athomo ◽  
Rodrigue Safou Tchiama ◽  
Francisco José Santiago-Medina ◽  
Antonio Pizzi ◽  
...  
Keyword(s):  
Condensed Tannins ◽  
Natural Forest ◽  
Maldi Tof ◽  
Ftir Characterization ◽  
Aucoumea Klaineana

scholarly journals EXTRACTION, QUANTIFICATION, AND FTIR CHARACTERIZATION OF BARK TANNINS OF FOUR FOREST SPECIES GROWN IN NORTHEAST BRAZIL

2021 ◽  
Vol 45 ◽  
Author(s):  
Sarah Rebeka Rodrigues Marques ◽  
Tatiane Kelly Barbosa Azevêdo ◽  
Aline Rogéria Freire de Castilho ◽  
Renata Martins Braga ◽  
Alexandre Santos Pimenta
Keyword(s):  
Condensed Tannins ◽  
Water Extract ◽  
Acacia Mangium ◽  
Hot Water ◽  
Northeast Brazil ◽  
Forest Species ◽  
Ftir Characterization ◽  
Hot Water Extract ◽  
Solids Content

ABSTRACT Condensed tannins are chemical compounds derived from the secondary metabolism of plants. They are of particular interest due to their broad range of technological uses and applications. The objective of this study was to extract, quantify, and characterize by Fourier-transform infrared spectroscopy (FTIR) the bark tannins of four forest species grown in Northeast Brazil: Acacia mangium, Azadirachta indica, Mimosa tenuiflora, and Mimosa caesalpiniifolia. Bark samples were collected from 5 trees of each species grown in a five-year-old forest stand. Samples were collected, grounded, and submitted to extraction with hot water, then measured to determine total solids content (TSC), Stiasny number (SN), and condensed tannins content (CTC). FTIR spectra were acquired from tannin samples fixed in potassium bromide pellets. Among the four species, M. tenuiflora presented the highest CTC, equal to 23.4%, and the purest crude hot-water extract with SN of 91.27%. Based on FTIR characterization, tannins from M. caesalpiniifolia, A. indica, and A. mangium barks were classified as proanthocyanidins and those from M. tenuiflora bark as prodelphinidins.

Characterization of polyethers using different methods: SFC, LAC and SEC with different detectors, and MALDI-TOF-MS

1996 ◽  
Vol 110 (1) ◽  
pp. 231-240 ◽  
Author(s):  
Bernd Trathnigg ◽  
Bernhard Maier ◽  
Günther Schulz ◽  
Ralph-Peter Krüger ◽  
Ulrich Just
Keyword(s):  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms

Structural characterization of native and oxidized procyanidins (condensed tannins) from coffee pulp (Coffea arabica) using phloroglucinolysis and thioglycolysis-HPLC-ESI-MS

2021 ◽  
Vol 340 ◽  
pp. 127830
Author(s):  
Jorge E. Wong-Paz ◽  
Sylvain Guyot ◽  
Pedro Aguilar-Zárate ◽  
Diana B. Muñiz-Márquez ◽  
Juan C. Contreras-Esquivel ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Coffea Arabica ◽  
Condensed Tannins ◽  
Coffee Pulp ◽  
Esi Ms

NMR, HPLC-ESI-MS, and MALDI-TOF MS Analysis of Condensed Tannins from Delonix regia (Bojer ex Hook.) Raf. and Their Bioactivities

2012 ◽  
Vol 60 (19) ◽  
pp. 5013-5022 ◽  
Author(s):  
Wei-Ming Chai ◽  
Yan Shi ◽  
Hui-Ling Feng ◽  
Ling Qiu ◽  
Hai-Chao Zhou ◽  
...  
Keyword(s):  
Condensed Tannins ◽  
Maldi Tof Ms ◽  
Esi Ms ◽  
Delonix Regia ◽  
Maldi Tof ◽  
Ms Analysis ◽  
Tof Ms

Characterization of New Amphiphilic Block Copolymers of N-Vinylpyrrolidone and Vinyl Acetate, 2 - Chromatographic Separation and Analysis by MALDI-TOF and FT-IR Coupling

2010 ◽  
Vol 211 (15) ◽  
pp. 1678-1688 ◽  
Author(s):  
Nick Fandrich ◽  
Jana Falkenhagen ◽  
Steffen M. Weidner ◽  
Bastiaan Staal ◽  
Andreas F. Thünemann ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Chromatographic Separation ◽  
Amphiphilic Block Copolymers ◽  
Maldi Tof ◽  
Ft Ir

Multidimensional Characterization of α,ω-Telechelic Poly(ε-caprolactone)s via Online Coupling of 2D Chromatographic Methods (LC/SEC) and ESI-TOF/MALDI-TOF-MS

2012 ◽  
Vol 45 (24) ◽  
pp. 9779-9790 ◽  
Author(s):  
Haitham Barqawi ◽  
Elena Ostas ◽  
Bo Liu ◽  
Jean-François Carpentier ◽  
Wolfgang H. Binder
Keyword(s):  
Maldi Tof Ms ◽  
Chromatographic Methods ◽  
Maldi Tof ◽  
Tof Ms

Characterization of honeybee venom by MALDI-TOF and nanoESI-QqTOF mass spectrometry

2011 ◽  
Vol 54 (2) ◽  
pp. 273-278 ◽  
Author(s):  
Jan Matysiak ◽  
Christian E.H. Schmelzer ◽  
Reinhard H.H. Neubert ◽  
Zenon J. Kokot
Keyword(s):  
Mass Spectrometry ◽  
Honeybee Venom ◽  
Maldi Tof

Versatile thin layer spectroelectrochemical cell employing specular reflectance

1987 ◽  
Vol 65 (5) ◽  
pp. 919-923 ◽  
Author(s):  
A. Scott Hinman ◽  
Brad J. Pavelich
Keyword(s):  
Thin Layer ◽  
Specular Reflection ◽  
Incident Light ◽  
Tetrabutylammonium Perchlorate ◽  
Specular Reflectance ◽  
Advantages And Disadvantages ◽  
Ftir Characterization ◽  
Sandwich Type

A versatile thin layer spectroelectrochemical cell employing specular reflection of the incident light beam from the electrode surface is described. Its application to in-situ uv–vis and FTIR characterization of the products of electrochemical reactions and to thin layer voltammetry and coulometry as well as conventional cyclic voltammetry is demonstrated for the oxidation of tetraphenylporphinatozinc in dichloroethane/tetrabutylammonium perchlorate solution. The advantages and disadvantages of this type of cell as compared to more conventional sandwich type optically transparent thin layer electrodes are discussed.

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