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- W3034927160 abstract "X-ray analytical techniques are increasingly being used to study manuscripts and works of art on paper, whether with laboratory equipment or synchrotron sources. However, it is difficult to anticipate the impact of X-ray photons on paper- and cellulose-based artifacts, particularly due to the large variety of their constituents and degradation levels, and the subsequent material multiscale heterogeneity. In this context, this work aims at developing an analytical approach to study the modifications in paper upon synchrotron radiation (SR) X-ray radiation using analytical techniques, which are fully complementary and highly sensitive, yet not frequently used together. At the molecular scale, cellulose chain scissions and hydroxyl free radicals were measured using chromatographic separation techniques (size-exclusion chromatography–multiangle laser light scattering–differential refractive index (SEC–MALS–DRI) and reversed-phase high-performance liquid chromatography–fluorescence detector–diode array detector (RP-HPLC–FLD–DAD)), while the optical properties of paper were characterized using spectroscopy (UV luminescence and diffuse reflectance). These techniques showed different sensitivities toward the detection of changes. The modifications in the cellulosic material were monitored in real time, within a few days, and up to 2 years following the irradiation to define a lowest observed adverse effect dose (LOAED). As paper is a hygroscopic material, the impact of the humidity in the environment was studied using this approach. Three levels of moisture content in the paper, achieved by conditioning the samples and irradiating them at different relative humidities (RHs), were studied (0, 50, 80% RH). It was shown that very low moisture content accelerated molecular and optical modifications." @default.
- W3034927160 created "2020-06-19" @default.
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- W3034927160 date "2020-06-15" @default.
- W3034927160 modified "2023-10-17" @default.
- W3034927160 title "Short- and Long-Term Effects of X-ray Synchrotron Radiation on Cotton Paper" @default.
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- W3034927160 doi "https://doi.org/10.1021/acs.biomac.0c00512" @default.
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