Results 61 to 70 of about 3,644 (285)

Transition of plant resins from the biosphere to the lithosphere

Geo&Bio, 2020
In the article the authors consider in detail the process of transition of plant resins from the biosphere to the lithosphere, characterize the conditions and paleogeographic situation of such transition, the formation of deposits of resin minerals and ...
Viktor M. Matsui, Uliana Z. Naumenko
doaj   +1 more source

Variations of the Eocene climate reflected in the isotopic composition of fossil resins from the Northwest Territories, Canada

, 2007
Middle Eocene conifer resins have been analyzed for their C and H isotopic compositions, as well as spectral characteristics using FTIR. The resins were recovered from an unlithified peat sequence that forms part of the infill of the Giraffe kimberlite ...
Farquhar, J., van Kranendonk, M., Tipper, E. T., Nabil, Hassan, Beard, Andrew, Wills, K., Bickle, M.J., Tumiati, S., Bourdon, B., Schrag, Daniel P, Wolfe, Alexander P., Thomazo, Christophe, Philippot, P., Foden, J., T. Tipper, E., Cox, Richard A., Bickle, M. J., L. Birck, J., Harris, J.W., Goryniuk, M., Steefel, Carl I, Tappert, Ralf, Martin, S., Godard, G., Ader, M., Tollari, Nadège, Barnes, Sarah-Jane, Muehlenbachs, Karl, Tappert, R., Galy, A., G. Tessalina, S., DePaolo, Donald J, Turchyn, A. V., Gaillardet, J., Cox, R.A., Tomlinson, E.   +35 more
core   +1 more source

FIGURE 7 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber

, 2012
FIGURE 7. Images showing effects of heat on amber samples. A. Baltic sample prior to treatment. B. Yellowing of Baltic sample due to heat exposure. C. Burmese sample prior to treatment. D.
Grimaldi, David A., Elkin, Lisa, Nascimbene, Paul C., Bisulca, Christina   +3 more
core   +1 more source

Improved electrical properties, hydrophobicity, and degradability of ortho-vanillin-based epoxy resin: Roles of Schiff base

Polymer Testing
Conventional diglycidyl ether of bisphenol A epoxy resins (DGEBA) are made from non-renewable fossil resources, which caused severe resource waste and environmental issues.
Xiao Peng, Xuetong Zhao, Tingyue Dong, Yuan Yuan, Li Cheng, Lijun Yang, Ruijin Liao   +6 more
doaj   +1 more source

First record of Jacobsoniidae (Coleoptera) on the African continent in Holocene copal from Tanzania: biogeography since the Cretaceous

Scientific Reports, 2023
Neither fossil nor living Jacobsoniidae are found in abundance. Derolathrus cavernicolus Peck, 2010 is recorded here preserved in Holocene copal from Tanzania with an age of 210 ± 30 BP years.
David Peris, Jörg U. Hammel, Chenyang Cai, Mónica M. Solórzano-Kraemer   +3 more
doaj   +1 more source

Glass fibre resin casts of fossils

, 1960
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Rixon, A E, Meade, M J
openaire   +2 more sources

FIGURES 5–6 in A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins

, 2015
FIGURES 5–6. Orchesia canaliculata sp. nov., holotype. 5) head, frontal view (reconstruction); 6) hind leg (reconstruction).Published as part of Alekseev, Vitalii I.
Alekseev, Vitalii I., Bukejs, Andris
core   +1 more source

Additives Enhancing Biodegradability in Plastics and Potential Implications for Textiles: A Mechanistic Review

Journal of Applied Polymer Science, EarlyView.
Mechanistic insights from additive‐assisted plastic degradation guide the design of environmentally adaptive textile fibers. Functional additives enhance oxidative, hydrolytic, enzymatic, and microbial degradation pathways. Translating these strategies requires control of fiber architecture, additive distribution, and environmental interactions ...
Julia Cunniffe, Joel Pawlak, Richard Venditti   +2 more
wiley   +1 more source

Taphonomy of Fossil Resins: A Petrological and Geochemical Approach Using the Van Krevelen Diagram

Fossil resins from the area of Gulf of Gdańsk, Lublin area, Denmark, Bitterfeld, Lusatia and Ukraine, often grouped under the collective term ‘Baltic amber’, are complex organic mineraloids that have undergone various post-depositional ...
Jacek Szwedo, Błażej Bojarski, Karolina Cierocka   +2 more
core   +1 more source

FIGURE 1 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber

, 2012
FIGURE 1. Historical deterioration of amber pieces in the AMNH collections: A. Crazing of several old Baltic amber specimens. B. Old Baltic amber piece with insect exhibiting "darkening." C. Same specimen after repolishing. D.
Grimaldi, David A., Elkin, Lisa, Nascimbene, Paul C., Bisulca, Christina   +3 more
core   +1 more source