Results 51 to 60 of about 3,644 (285)

Selective flotation of fossil resin from western coal [PDF]

, 1991
The test program has demonstrated that: (1) technically, the new flotation technologies discovered at the University of Utah and then improved upon by Advanced Processing Technologies, Inc. provide a highly efficient means to selectively recover fossil resin from coal.
Jensen, G. F., Miller, J. D.
openaire   +6 more sources

Precision Lignocellulosic Biorefinery: Process Regulation From Corn Stover to Products

Advanced Science, EarlyView.
This study presents a precision biorefinery framework that transforms corn stover into high‐value bioproducts through whole‐process regulation. Mechanical fractionation separates feedstock into parenchyma‐rich short fibers and vascular‐bundle‐dominant long fibers.
Xue‐Cheng Lin, Lan Wang, Tai‐Ran Pang, Ming‐Yuan Yin, Hong‐Zhang Chen   +4 more
wiley   +1 more source

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

, 2015
Alekseev, Vitalii I., Bukejs, Andris (2015): A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins.
Alekseev, Vitalii I., Bukejs, Andris
core   +1 more source

Recent Advances in Carbon Cathode Materials toward High‐Performing Zinc‐Ion Hybrid Supercapacitors

Advanced Science, EarlyView.
Aqueous zinc‐ion hybrid supercapacitors (ZHSCs) have emerged as promising next‐generation electrochemical energy‐storage devices. Porous carbon materials have been extensively studied as cathodes, with advances in tailoring pore structures and material properties to enhance performance.
Take Hirooka, Zhaolin Liu, Ivan P. Parkin, Guanjie He   +3 more
wiley   +1 more source

Functionalized Natural Tannins For Preparation of a novel non-isocyanate polyurea-based adhesive

Polymer Testing, 2023
In recent years, the shortcomings of products bonded with adhesives of conventional resins (e.g. urea-formaldehyde, phenol-formaldehyde, melamine-based) have raised concerns as people have become more environmentally conscious while fossil resources are ...
Haizhu Wu, Dongsen Liao, Xinyi Chen, Guanben Du, Taohong Li, Hisham Essawy, Antonio Pizzi, Xiaojian Zhou   +7 more
doaj   +1 more source

FIGURE 6 in Variation in the Deterioration of Fossil Resins and Implications for the Conservation of Fossils in Amber

, 2012
FIGURE 6. Yellowing of the five resins following heat aging, based on change in CIELab values.Published as part of Bisulca, Christina, Nascimbene, Paul C., Elkin, Lisa & Grimaldi, David A., 2012, Variation in the Deterioration of Fossil Resins and ...
Grimaldi, David A., Elkin, Lisa, Nascimbene, Paul C., Bisulca, Christina   +3 more
core   +1 more source

Extraction of inclusions from (sub)fossil resins, with description of a new species of stingless bee (Hymenoptera: Apidae: Meliponini) in Quaternary Colombian copal [PDF]

, 2013
Amber and copal are renowned for preserving insects and other inclusions with lifelike fidelity. However, due to their frozen-in-time nature, they are taxonomically subequal to Recent insects, which commonly require dissection in order to identify them ...
Wadsworth, Caroline, Preziosi, Richard F., Preziosi, R, Penney, David, Penney, D, Wadsworth, C, Brown, TA, Kennedy, SL, Brown, Terence A., Kennedy, Sandra L., Green, DL, Green, David I.   +11 more
core   +1 more source

Taxonomic reassessment of fossil Sequoia and Protosequoia from the Upper Miocene of Central Honshu, Japan, with implications for leaf morphological variation in extant S. sempervirens

American Journal of Botany, EarlyView.
Abstract Premise Since its emergence in the Mesozoic, Sequoia (Cupressaceae) has been considered to possess conserved leaf morphology. However, recent studies have shown that the leaves of extant S. sempervirens become smaller, with a scale form, with increasing tree height.
Shun Ikeda, Arata Momohara
wiley   +1 more source

Mass spectrometry in the characterization of ambers. II. Free succinic acid in fossil resins of different origin

, 2009
Baltic amber contains high levels of succinic acid, most of which is part of the polymer framework, and only recently has the presence of microcrystals of free succinic acid been documented by scanning electron microscopy and X-ray diffraction analysis ...
TONIDANDEL L, TRALDI P., RAGAZZI, EUGENIO   +2 more
core   +1 more source

Evolution of ideas about the origin of fossil resins

Мінеральні ресурси України, 2017
The paper deals with evolution of ideas about the origin of fossil resins as physically and chemically individualized organic compounds – pro­ducts of natural processes in the Earth’s crust, biogenic origin and noncrystalline structure.
M. A. Bogdasarov, H. I. Rudko
doaj