Results 11 to 20 of about 313 (141)

Multianalytical Study of Amuletic and Talismanic Islamic-African Paper Manuscripts in the Slovene Ethnographic Museum. [PDF]

Chempluschem
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
Elnaggar A, Mahgoub H, Maestro-Guijarro L, Crespo Ibáñez A, María Carmona-Quiroga P, Sánchez-Cortés S, Rehar Ž, Kos G, Ameen A, Frelih M, Strlič M, Oujja M, Castillejo M.   +12 more
europepmc   +2 more sources

Assessing the Impact of Vegan Toothpastes on Enamel Color Change and Surface Properties. [PDF]

J Esthet Restor Dent
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 ...
da Trindade Souza de Melo Carneiro RV, Garcia RM, Scaramucci T, Cavalli V.   +3 more
europepmc   +2 more sources

Iron influence on dissolved color in lakes of the Upper Great Lakes States

PLOS ONE, 2019
Colored dissolved organic matter (CDOM), a major component of the dissolved organic carbon (DOC) pool in many lakes, is an important controlling factor in lake ecosystem functioning. Absorption coefficients at 440 nm (a440, m-1), a common measure of CDOM, exhibited strong associations with dissolved iron (Fediss) and DOC in 280 lakes of the Upper Great
Patrick L. Brezonik, Jacques C. Finlay, Claire G. Griffin, William A. Arnold, Evelyn H. Boardman, Noah Germolus, Raymond M. Hozalski, Leif G. Olmanson   +7 more
openaire   +4 more sources

Unraveling long-term changes in lake color based on optical properties of lake sediment

Science of The Total Environment, 2020
A number of boreal surface waters have become browner over the last two decades. Recovery from acid rain is regarded as an important driver for this lake color increase, indicating a general browner lake color in preindustrial times. However, the lack of long-term monitoring data makes it challenging to unravel historical changes in lake color. In this
Rohrlack, Thomas, Riise, Gunnhild, Xiao, Yihua   +3 more
openaire   +4 more sources

Progress in lake water color remote sensing

Journal of Lake Sciences, 2009
We analyzed in detail the status quo of lake water color remote sensing from some aspects of satellite sensor, atmospheric correction, optical properties measurement, bio-optical model, radiative transfer model for the waters, and water quality parameter retrieval approach.
MA Ronghua, TANG Junwu, DUAN Hongtao, PAN Delu   +3 more
openaire   +2 more sources

Process Optimization and Characterization of β-Carotene-Calcium Carbonate Colorant Lake

Shipin gongye ke-ji
Liposoluble pigments, predominantly sourced from natural extracts, are celebrated for their exceptional safety profile and a wide array of physiological benefits.
Yifen FU, Yuhan LIU, Le JING, Jiaqi CUI, Xu ZHAI, Dongdong YUAN, Chengtao WANG   +6 more
doaj   +1 more source

Natural Colorants for Dyeing and lake Pigments [PDF]

Ge-conservacion, 2015
Reseña del libro Natural Colorants for Dyeing and lake Pigments. Autores: Jo Kirby, Maarten van Bommel, André Verhecken Publicado por: Archetype Publications Ltd con CHARISMA Londres, 25 de Octubre de 2014 114 páginas, 208 x 297mm Idioma: Inglés ISBN-10: 1909492159ISBN-13: 978 ...
openaire   +2 more sources

Lake morphometry moderates the relationship between water color and fish biomass in small boreal lakes [PDF]

Limnology and Oceanography, 2018
AbstractLake morphometry may moderate the effects of water color on fish biomass in boreal lakes, but empirical evidence is scarce because there are a limited number of lakes for which both water color and bathymetry have been measured. We evaluated variations in catch‐per‐unit‐effort (CPUE), an indicator of fish biomass, across orthogonal gradients of
David A. Seekell, Pär Byström, Jan Karlsson   +2 more
openaire   +2 more sources

125 years of exploration and research at Gough's Cave (Somerset, UK) 125 ans d'exploration et de recherches à Gough's Cave (Somerset, Royaume‐Uni)

Journal of the Royal Anthropological Institute, EarlyView.
Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello, Mark D. Lewis, Simon A. Parfitt   +2 more
wiley   +1 more source

Synchronous variation of dissolved organic carbon and color in lakes [PDF]

Limnology and Oceanography, 2002
Temporal variation in dissolved organic carbon (DOC) and water color (light absorption at 440 nm) was measured in 20 lakes in northern Michigan that varied in DOC, pH, morphometry, and relative productivity as indicated by chlorophyll and total phosphorus (TP).
Michael L. Pace, Jonathan J. Cole
openaire   +1 more source