Results 11 to 20 of about 333 (139)

Preparation of Edible Colorant Lake Using Calcium Carbonate and β-Carotene: Structural Characterization and Formation Mechanism Study [PDF]

Foods
This study prepared a novel β-carotene colorant lake using calcium carbonate (CaCO3) and investigated the lake formation process and its basic characteristics. Kinetic adsorption analysis confirmed that medium pH (9.3) and medium temperature (40 °C) were
Dongdong Yuan
exaly   +4 more sources

Production of Smoked Sausage Using Monascus Pigments-Calcium Carbonate Colorant Lake with Nisin as a Nitrite Substitute [PDF]

Foods
This study explored the complete replacement of sodium nitrite with a combination of Monascus pigments (MPs)-calcium carbonate colorant lake (MPs-CaCO3 lake) and nisin in smoked sausage production. The effects of the replacement on color stability, total
Jiaqi Cui, Guohui Bai, Yifen Fu, Xu Zhai, Le Jing, Yuhan Liu, Dongdong Yuan, Chengtao Wang   +7 more
doaj   +2 more sources

Influence of the Crystal Forms of Calcium Carbonate on the Preparation and Characteristics of Indigo Carmine-Calcium Carbonate Lake [PDF]

Foods
In this study, indigo carmine (IC)-calcium carbonate lakes with different crystalline forms of calcium carbonate were prepared through co-precipitation methods, and the properties of these lakes and their formation mechanisms were investigated.
Le Jing, Yuhan Liu, Jiaqi Cui, Jinghan Ma, Dongdong Yuan, Chengtao Wang   +5 more
doaj   +2 more sources

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, Bernadette Frühmann, Federica Cappa, Manfred Schreiner   +3 more
doaj   +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, Tamlin M. Pavelsky, Hilary A. Dugan, Xiao Yang, John Gardner, Matthew R.V. Ross   +5 more
openaire   +2 more sources

The Color of Earth’s Lakes

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, Catherine M. O’Reilly, John R. Gardner, Matthew R. V. Ross, Simon N. Topp, Jida Wang, Tamlin M. Pavelsky   +6 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

High-Concentration Hydrogen Peroxide Gels Containing Calcium Polyphosphate Associated With Violet Led Light: Bleaching Efficacy and Effects on Enamel Properties. [PDF]

J Esthet Restor Dent
ABSTRACT Objectives To evaluate the effect of violet LED light (VL) and hydrogen peroxide (HP) in‐office bleaching gels supplemented with calcium polyphosphate (CaPP) or calcium gluconate (GU): Materials and Methods Bovine enamel blocks (n = 10) were randomly assigned: commercial HP gel, commercial HP gel with GU, or experimental 35% HP with or without
Dos Anjos HA, Lima DANL, Barbosa CM, Rischka K, Vieira-Junior WF.   +4 more
europepmc   +2 more sources

High performance liquid chromatography as a micro-destructive technique for the identification of anthraquinone red dyestuffs in cultural heritage objects

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., Blanco Guerrero Astrid, Siracusano Gabriela, Maier Marta S.   +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