Non-invasive characterization of polymeric materials in relation to art conservation using unilateral NMR combined with multivariate data analysis

Kehlet, Cindie; Federico, Eleonora Del; Schahbaz, Hiba; Catalano, Amelia; Dittmer, Jens; Nielsen, Niels Chr.

doi:10.1039/c3ay40650d

Cited by 12 publications

(12 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stray field (unilateral) NMR was used to assess overall cooperative reorientation of 1 H nuclei 47,48 through their transverse relaxation and to compare the NMR signal decay for RR oep cutins with a panel of synthetic resins, including several engineered polyesters. 35 The dewaxed RR cutin samples displayed two-component spin echo decays with characteristic times of 0.15 ± 0.04 and 0.65 ± 0.4 ms; good agreement was observed between the two biological replicates. The relaxation decays in Figure 3 reveal that subsurface regions of the outer RR tomato cutins (#51, #52) are fairly rigid with respect to the 50 commercial resins in the ResinKit, 35 reproducibly displaying similar flexibility to the poly(butylene terephthalate) and glycol-modified poly(ethylene terephthalate) thermoplastic polyesters in the group (#17, #18).…”

Section: Resultsmentioning

confidence: 74%

“…These two samples are part of the ResinKit obtained from the Plastic Group of America (Woonsocket, RI, U.S.A.). The ResinKit provides samples and technical information on 50 of the most common industrially used thermoplastic resins (see Kehlet et al 35 for further details).…”

Section: Methodsmentioning

confidence: 99%

“…Transverse 1 H spin relaxation decays measured by unilateral NMR for dewaxed red ripe outer epidermal cuticles (cutins) from M82 tomato fruits and two synthetic resins, 35 showing consistency of two biological replicates (#51, #52) and discrimination with respect to the commercial polymers (shown by the different color coding). The polyesters poly(butylene terephthalate) (#17) and glycol-modified poly(ethylene terephthalate) (#18) are included for comparison.…”

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

Solid-State ¹³C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

et al. 2015

Self Cite

View full text Add to dashboard Cite

Plant cuticles on outer fruit and leaf surfaces are natural macromolecular composites of waxes and polyesters that ensure mechanical integrity and mitigate environmental challenges. They also provide renewable raw materials for cosmetics, packaging, and coatings. To delineate the structural framework and flexibility underlying the versatile functions of cutin biopolymers associated with polysaccharide-rich cell-wall matrices, solid-state NMR spectra and spin relaxation times were measured in a tomato fruit model system, including different developmental stages and surface phenotypes. The hydrophilic–hydrophobic balance of the cutin ensures compatibility with the underlying polysaccharide cell walls; the hydroxy fatty acid structures of outer epidermal cutin also support deposition of hydrophobic waxes and aromatic moieties while promoting the formation of cell-wall cross-links that rigidify and strengthen the cuticle composite during fruit development. Fruit cutin-deficient tomato mutants with compromised microbial resistance exhibit less efficient local and collective biopolymer motions, stiffening their cuticular surfaces and increasing their susceptibility to fracture.

show abstract

Section: Resultsmentioning

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

Solid-State ¹³C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…[15] Finally, these two parameters can be used to describe plastic, polymer, rubber and gum, all very common materials in modern and contemporary art. [16,17] In this contribution, the longitudinal and transversal decays are useful in distinguishing between solution and solid CDD contributions. Particularly when solid CDD is present in the pores, it can act as a successful temporary consolidant.…”

Section: Introductionmentioning

confidence: 99%

A non‐invasive NMR relaxometric characterization of the cyclododecane–solvent system inside porous substrates

Presciutti

Anselmi

Brunetti

et al. 2014

Magnetic Reson in Chemistry

View full text Add to dashboard Cite

With the aim of deepening the knowledge on the behavior of cyclododecane (CDD) as a temporary consolidant agent for weathered stones, NMR longitudinal and transverse relaxation decays have been exploited to follow the distribution of cyclododecane solutions into porous matrices. By measuring as function of time the relaxation decay constants of CDD solutions dropped onto porous supports, it has been possible to differentiate the step encompassing the solvent evaporation, which determines the consolidant migration within the matrix, from that governing the consolidant sublimation, which is related to the consolidation effectiveness over time.

show abstract

“…Multivariate data analysis has been proven to be an effective tool in analyzing the large and complex datasets from cultural heritage studies . Principal component analysis (PCA) is widely used for dimensionality reduction and classification of complex data sets .…”

Section: Introductionmentioning

confidence: 99%

¹H NMR study and multivariate data analysis of reindeer skin tanning methods

Zhu

Ilott

Federico

et al. 2016

Magnetic Reson in Chemistry

Self Cite

View full text Add to dashboard Cite

Reindeer skin clothing has been an essential component in the lives of indigenous people of the arctic and sub-arctic regions, keeping them warm during harsh winters. However, the skin processing technology, which often conveys the history and tradition of the indigenous group, has not been well documented. In this study, NMR spectra and relaxation behaviors of reindeer skin samples treated with a variety of vegetable tannin extracts, oils and fatty substances are studied and compared. With the assistance of principal component analysis (PCA), one can recognize patterns and identify groupings of differently treated samples. These methods could be important aids in efforts to conserve museum leather artifacts with unknown treatment methods and in the analysis of reindeer skin tanning processes. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Non-invasive characterization of polymeric materials in relation to art conservation using unilateral NMR combined with multivariate data analysis

Cited by 12 publications

References 28 publications

Solid-State ¹³C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

Solid-State ¹³C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

A non‐invasive NMR relaxometric characterization of the cyclododecane–solvent system inside porous substrates

¹H NMR study and multivariate data analysis of reindeer skin tanning methods

Contact Info

Product

Resources

About

Non-invasive characterization of polymeric materials in relation to art conservation using unilateral NMR combined with multivariate data analysis

Cited by 12 publications

References 28 publications

Solid-State 13C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

Solid-State 13C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

A non‐invasive NMR relaxometric characterization of the cyclododecane–solvent system inside porous substrates

1H NMR study and multivariate data analysis of reindeer skin tanning methods

Contact Info

Product

Resources

About

Solid-State ¹³C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

Solid-State ¹³C NMR Delineates the Architectural Design of Biopolymers in Native and Genetically Altered Tomato Fruit Cuticles

¹H NMR study and multivariate data analysis of reindeer skin tanning methods