Characterization of Pinus nigra var. laricio [Maire] bark extracts at the analytical and pilot scale
-
Sauro Bianchi
,
Florian Zikeli
Abstract
Pinus nigra var. laricio bark and its hot-water extracts (HWE) obtained at an analytical and pilot plant scale have been characterized in terms of phenolic extractives, condensed tannins (CTs), carbohydrates and inorganic compounds. Analytical extractions with aqueous acetone were also performed for comparison with HWE. The bark contains 35.5 g kg−1 CT, and two-thirds of it could be extracted. Analytical HWE at 75°C led to a total yield of 56.4 g kg−1. The extracts are mainly composed of phenolic compounds (50.7%) and pectins (19.7%). CTs amount to 17.9% of the extracts and are procyanidins with a mean degree of polymerization (DP) of about 9. Non-tannin phenolic oligomers also occurred in the extracts, which could be identified by pyrolysis gas chromatography mass spectrometry (Py-GC/MS) as lignin fragments. Matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry (MALDI-TOF MS) revealed that the CT is a flavanol derivative in methylated form. Further characterization and tailoring of the HWE properties is needed in the context of their specific application.
Acknowledgments
The authors would like to thank the Ambi.Tec.Fil.Legno project (PON03_00024_1: scientific coordination: Prof. Giuseppe Scarascia-Mugnozza) for the financial support of the study and Schilliger Bois SAS (Volgelsheim, France) for the kind support in drying the bark.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: Ambi.Tec.Fil.Legno Project PON03_ 00024_1.
Employment or leadership: None declared.
Honorarium: None declared.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Articles
- Rapid identification of wood species by near-infrared spatially resolved spectroscopy (NIR-SRS) based on hyperspectral imaging (HSI)
- Comparison of various multivariate models to estimate structural properties by means of non-destructive techniques (NDTs) in Pinus sylvestris L. timber
- Influence of length on acoustic time-of-flight (ToF) measurement in built-in structures of Norway spruce timber
- Characterization of Pinus nigra var. laricio [Maire] bark extracts at the analytical and pilot scale
- Determination of the absolute molar mass of acetylated eucalyptus kraft lignin by two types of size-exclusion chromatography combined with multi-angle laser light-scattering detectors
- Moisture-induced deformation in the neck of a classical guitar
- Prediction of physical and mechanical properties of thermally modified wood based on color change evaluated by means of “group method of data handling” (GMDH) neural network
- A self-cleaning surface based on heat treatment of g-C3N4-coated wood prepared by a rapid and eco-friendly method
- Mechanical, thermo-mechanical and water uptake performance of wood flour filled polyurethane elastomer eco-composites: influence of surface treatment of wood flour
- Investigation of a new formaldehyde-free adhesive consisting of soybean flour and Kymene® 736 for interior plywood
- Negative oxygen ion (NOI) production by enhanced photocatalytic TiO2/GO composites anchored on wooden substrates
Articles in the same Issue
- Frontmatter
- Original Articles
- Rapid identification of wood species by near-infrared spatially resolved spectroscopy (NIR-SRS) based on hyperspectral imaging (HSI)
- Comparison of various multivariate models to estimate structural properties by means of non-destructive techniques (NDTs) in Pinus sylvestris L. timber
- Influence of length on acoustic time-of-flight (ToF) measurement in built-in structures of Norway spruce timber
- Characterization of Pinus nigra var. laricio [Maire] bark extracts at the analytical and pilot scale
- Determination of the absolute molar mass of acetylated eucalyptus kraft lignin by two types of size-exclusion chromatography combined with multi-angle laser light-scattering detectors
- Moisture-induced deformation in the neck of a classical guitar
- Prediction of physical and mechanical properties of thermally modified wood based on color change evaluated by means of “group method of data handling” (GMDH) neural network
- A self-cleaning surface based on heat treatment of g-C3N4-coated wood prepared by a rapid and eco-friendly method
- Mechanical, thermo-mechanical and water uptake performance of wood flour filled polyurethane elastomer eco-composites: influence of surface treatment of wood flour
- Investigation of a new formaldehyde-free adhesive consisting of soybean flour and Kymene® 736 for interior plywood
- Negative oxygen ion (NOI) production by enhanced photocatalytic TiO2/GO composites anchored on wooden substrates
