Results 11 to 20 of about 2,318 (186)
Materials and techniques used for the “Vienna Moamin”: multianalytical investigation of a book about hunting with falcons from the thirteenth century [PDF]
Heritage Science, 2021 A multianalytical approach was used to characterize the materials in the “Vienna Moamin”, an outstanding richly illustrated manuscript from the late thirteenth century, which was made in Italy and is now kept in the Kunsthistorisches Museum Wien.
Wilfried Vetter +3 more
doaj +2 more sources
Multianalytical Study of Amuletic and Talismanic Islamic‐African Paper Manuscripts in the Slovene Ethnographic Museum [PDF]
ChemPlusChem, Volume 90, Issue 12, December 10, 2025.The image illustrates a multi‐technique analysis of Islamic‐African manuscripts from the nineteenth to twentieth centuries. It highlights methods like microscopy, hyperspectral imaging, FTIR, LIF, Raman, LIBS, and furnish analysis used to study paper fibers, inks, and dyes—revealing a blend of local and trade materials and a rich fusion of Qur’anic and
Abdelrazek Elnaggar +12 more
wiley +2 more sources
Assessing the Impact of Vegan Toothpastes on Enamel Color Change and Surface Properties [PDF]
Journal of Esthetic and Restorative Dentistry, Volume 37, Issue 9, Page 2104-2115, September 2025.ABSTRACT Objective To evaluate color (ΔE00) and whiteness index (ΔWID) changes, surface hardness loss (SHL), roughness (Ra), mineral content, and morphology of enamel brushed with vegan toothpastes. Methods Enamel blocks (n = 10/group) were stained with black tea (T0) underwent 15.000 (T1) and 30.000 (T2) toothbrushing cycles with: (n = 10): (AS ...
Reginna Vyctoria da Trindade Souza de Melo Carneiro +3 more
wiley +2 more sources
Shifting Patterns of Summer Lake Color Phenology in Over 26,000 US Lakes [PDF]
Water Resources Research, 2021 Abstract Lakes are often defined by seasonal cycles. The seasonal timing, or phenology, of many lake processes are changing in response to human activities. However, long‐term records exist for few lakes, and extrapolating patterns observed in these lakes to entire landscapes is exceedingly difficult using the limited number of ...
Simon N. Topp +5 more
openaire +2 more sources
Coupling between increased lake color and iron in boreal lakes
Science of The Total Environment, 2021 Increasing evidence show that lake color has increased more than DOC in several boreal lakes, promoted by enhanced levels of light absorbing iron (Fe). Fe levels show great spatial and temporal variations in northern freshwaters, and processes regulating long-term Fe trends as well as differences among lakes are not fully understood.
Yihua, Xiao, Gunnhild, Riise
openaire +2 more sources
Geophysical Research Letters, 2022 AbstractAlthough water color is a fundamental property of freshwater ecosystems, the global distribution of lake color remains unknown. Here, we used 5.14 million color records derived from satellite images during 2013–2020 to determine the modal water color of 85,360 representative lakes worldwide.
Xiao Yang +6 more
openaire +2 more sources
Chemistry Teacher International, 2023 This article describes two of the most common natural sources of red anthraquinones that have been used since antiquity for textile dyeing and as lake pigments, namely cochineal insect and the roots of Rubia and Relbunium plants.
Careaga Valeria P. +3 more
doaj +1 more source
Aluminium and calcium lake pigments of Lac natural dye
Brazilian Journal of Pharmaceutical Sciences, 2020 This work presents the physicochemical properties of the prepared lac lakes. The study revealed the stability, cytotoxicity and use of lac lake pigment as a cosmetic colorant. SEM, XRD and DSC were used to study the characteristics of the lac lakes.. The
Ampa Jimtaisong
doaj +1 more source
Macroscale multimodal imaging reveals ancient painting production technology and the vogue in Greco-Roman Egypt. [PDF]
, 2017 Macroscale multimodal chemical imaging combining hyperspectral diffuse reflectance (400-2500 nm), luminescence (400-1000 nm), and X-ray fluorescence (XRF, 2 to 25 keV) data, is uniquely equipped for noninvasive characterization of heterogeneous complex ...
Delaney, John K +3 more
core +2 more sources
Deepening inside the pictorial layers of Etruscan sarcophagus of Hasti Afunei: An innovative micro-sampling technique for Raman/SERS analyses [PDF]
, 2019 The Hasti Afunei sarcophagus is a large Etruscan urn, made up of two chalky alabaster monoliths. Dated from the last quarter of the third century BC, it was found in 1826 in the small town of Chiusi (Tuscany- Il Colle place) by a landowner, Pietro Bonci ...
Bianco, Armandodoriano +7 more
core +1 more source