Results 241 to 250 of about 836,969 (319)
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The overview of analytical methods for studying of fossil natural resins
Critical Reviews in Analytical Chemistry, 2023The review presents methods that are used frequently for multi-analytical study of fossil resins. The preliminary characterization relies on physical methods such as microhardness, density and fluorescence in UV light measurements.
L. Natkaniec-Nowak +4 more
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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 ...
P. Drzewicz +2 more
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Deuterium exchangeability in modern and fossil plant resins
Geochimica et Cosmochimica Acta, 2018Deuterium 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.
Gabriela González Arismendi +4 more
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Arthropods in contemporary and some fossil resins
Paleontological Journal, 2009More than 4800 arthropod inclusions were isolated and identified from resin of various contemporary conifer trees in various parts of northern Eurasia. Their composition is compared with that in representative collections of Baltic and Rovno ambers (Upper Eocene) and with that in Dominican amber (Lower Miocene).
V. Zherikhin +2 more
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Mineralogy of fossil resins in Northern Eurasia
Geology of Ore Deposits, 2007The investigation is focused on identification and origin of fossil resins from the Cretaceous, Tertiary, and Quaternary sediments of Northern Eurasia on the basis of detailed study of their physical and chemical characteristics: morphology; size; mass; density; optical, mechanical, and thermal properties; chemical composition; etc.
M. Bogdasarov
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Conceptual Frameworks for Geographic-Botanical Affinities of Fossil Resins
Canadian Journal of Earth Sciences, 1974Solid-state analytical techniques have been applied to natural resins to establish paleo-geographic-botanical frameworks. Infrared spectroscopy, X-ray diffraction, and differential thermal analysis were the techniques utilized. Fossilized resins (ambers) and recent to modern natural resins (gums and copals) from 47 world-wide localities were used in ...
P. Broughton
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Recent and fossil resins from New Zealand and Australia
Geoarchaeology, 1993AbstractThe 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 ...
J. B. Lambert +3 more
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Zootaxa, 2022
Two new extinct species of the genus Atomaria Stephens, 1829 are described and illustrated: A. (Anchicera) alekseevi sp. nov. from Baltic amber and A. (Anchicera) perkovskyi sp. nov. from Rovno amber.
G. Lyubarsky, A. Bukejs
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Two new extinct species of the genus Atomaria Stephens, 1829 are described and illustrated: A. (Anchicera) alekseevi sp. nov. from Baltic amber and A. (Anchicera) perkovskyi sp. nov. from Rovno amber.
G. Lyubarsky, A. Bukejs
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Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2020
The objective of this work is to establish a spectral assignment of several communic acids. The most significant vibrational modes of three stereoisomers of communic acids [trans-, cis-, and iso- (or mirceo-)] are presented.
Ó. R. Montoro +4 more
semanticscholar +1 more source
The objective of this work is to establish a spectral assignment of several communic acids. The most significant vibrational modes of three stereoisomers of communic acids [trans-, cis-, and iso- (or mirceo-)] are presented.
Ó. R. Montoro +4 more
semanticscholar +1 more source

