ArticleACS omega2025
Characterization of an Oligomeric Lignin-Derived UV Absorber Produced from Hardwood Beech.
Article in ACS omega, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- A New Lignin-Based Polyurethane Film for Wood: Decay, Artificial Weathering, Physical and Morphological Characterization.Molecules (Basel, Switzerland) · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The damage caused by ultraviolet (UV) radiation to human skin and various materials, such as solar panels, has been extensively documented. Lignin-derived polymers have demonstrated excellent UV-protective properties; however, the uncertainty of their chemical structures and properties has hindered their further utilization. In this study, hardwood beech was degraded by CuO with the assistance of microwave heating. Several oligomeric lignin fractions were obtained from the degradation products by sequential extraction of the precipitates using diethyl ether, ethyl acetate, and acetone. The ethyl acetate-soluble lignin fraction and acetone-soluble lignin fraction were characterized by UV spectroscopy, heteronuclear single quantum coherence nuclear magnetic resonance (HSQC NMR), and gel permeation chromatography (GPC). The ethyl acetate-soluble lignin fractions exhibited UV absorbance comparable to that of technical lignins. HSQC NMR quantitative analysis results demonstrated an increase of conjugated structures involving aldehyde carboxylic acid, and α-ketone groups, and α,β-conjugated cinnamic acid structure end groups in the acetone-soluble fraction (side chain region: 19.4%; aromatic region: 16.8%) and the ethyl acetate-soluble fraction (side chain region: 28.1%; aromatic region: 22.0%), which may be attributed to the increase of UV absorbance. The average molecular weights of the ethyl acetate- and acetone-soluble lignin fractions were 940 and 1200, respectively. These results highlighted the potential of the oligomeric lignin-derived fractions obtained in this study as ideal natural UV absorbers. Moreover, the characterization method described herein may serve as a standardized protocol for evaluating UV-protective compounds derived from various biomasses through different processing techniques.
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.