Results 241 to 250 of about 3,644 (285)
Recent and fossil resins from New Zealand and Australia
Geoarchaeology - an International Journal, 1993 AbstractThe carbon‐13 nuclear magnetic resonance spectra of fossil resins from New Zealand and Australia have been compared with those of modern and semifossilized materials. The great majority of the fossilized samples have strong spectral similarities to modernAgathisresins and to North American fossil resins, which have been attributed to Agathis ...
Joseph B Lambert, George O Poinar
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Analytical approaches for studies of fossil resins
TrAC - Trends in Analytical Chemistry, 2016Abstract Knowledge on fossil resins (including amber and all their various types) has started to develop significantly since the second half of the 20th century mainly due to advancement of analytical methods and equipment. Nowadays, many researchers are focused on investigation of the resins due to not only their decorative appearance and its ...
Przemysław Drzewicz
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Amber, Resinite, and Fossil Resins
, 1996 Biology of Amber-Producing Trees: Focus on Case Studies of Hymenaea and Agathis Stable Isotope Composition of Amber Resin-Derived Hydrocarbons in Fresh and Fossil Dammar Resins and Miocene Rocks and Oils in the Mahakam Delta, Indonesia Pyrolytic and Spectroscopic Studies of the Diagenetic Alteration of Resinites Maturation of Class Ib (Polylabdanoid ...
openaire +2 more sources
Deuterium exchangeability in modern and fossil plant resins
Geochimica Et Cosmochimica Acta, 2018Abstract Deuterium exchange experiments on modern and fossil plant resins (amber) were conducted to assess to what extent diagenetic alteration can overprint the stable hydrogen (δ2H) and carbon (δ13C) isotopic composition of these materials. Pairs of resins and amber fragments were placed together with deuterated water in sealed quartz-glass tubes ...
Ralf Tappert +2 more
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Fossil Resins–Constraints from Portable and Laboratory Near-infrared Raman Spectrometers
Minerals (Basel, Switzerland), 2020 Comparative studies of fossil resins of various ages, botanical sources, geological environments, and provenience were provided via a handheld portable Near-Infrared (NIR)-Raman spectrometer and benchtop instrument both working with laser line 1064 nm ...
Beata Naglik +2 more
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X-Ray Diffraction Study of Some Fossil and Modern Resins
Science, 1967Samples of both fossil and modern resins have been investigated by x-ray diffraction techniques. Most fossil resins (ambers) yield only diffuse x-ray diffraction patterns, though some (settlingite, Highgate copalite, and guayaquillite) have relatively sharp patterns. Many modern resins, including those from species of Pinus
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Organic Geochemistry of Fossil Resins from the Czech Republic
Procedia Earth and Planetary Science, 2014 Five fossil resins from various localities in the Czech Republic were investigated. To arrive at more detailed description of the resins, pyrolysis-gas chromatography/mass spectrometry with derivatisation using tetramethylammonium hydroxide, gas ...
Martina Havelcova +2 more
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International Journal of Coal Geology, 2016 The terpenoid composition of well-preserved fresh and oxidized fossil resins (ambers) from Early Paleogene lignite-bearing sequences of India have been examined using gas chromatography-mass spectrometry for determining their botanical origin.
Swagata Paul, Suryendu Dutta
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