Results 111 to 120 of about 3,644 (285)

Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis

open access: yesChemSusChem, Volume 18, Issue 6, March 15, 2025.
The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo   +4 more
wiley   +1 more source

Cellulose From Aloe Vera Plant Waste as Crosslinker for Vat 3D Printable Vitrimers: Toward a Circular Economy Approach in Additive Manufacturing

open access: yesMacromolecular Materials and Engineering
The reduction of the environmental impact of photocurable resins, commonly used in vat 3D printing, is an urgent request. In order to truly enable vat additive manufacturing (AM) to adopt a circular economy approach, this can be done by both selecting ...
Sara Bergia   +8 more
doaj   +1 more source

13C Solid State Nuclear Magnetic Resonance and μ-Raman Spectroscopic Characterization of Sicilian Amber

open access: yes, 2016
13C cross-polarization magic angle spinning (CPMAS) nuclear magnetic resonance (NMR) and μ-Raman spectroscopy were applied to characterize Sicilian amber samples.
Proietti, Noemi   +6 more
core   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

open access: yesDeep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand   +5 more
wiley   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

open access: yesDeep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long   +4 more
wiley   +1 more source

Cretaceous mycelia preserving fungal polysaccharides: taphonomic and paleoecological potential of microorganisms preserved in fossil resins

open access: yesGeologica Acta, 2015
The cortices of pieces of Cretaceous amber around the world commonly are constituted by networks of filamentous structures. Based on their morphological characteristics, such structures have previously been classified in different microorganismal groups.
M. SPERANZA   +3 more
doaj  

Données nouvelles dans l'étude minéralogique de résines fossiles de France

open access: yes, 1978
Fossil resins, especially amber, cannot be characterized by means of classical techniques used in mineral studies. New physical or physic-chemical techniques enable their characterization.
Sviatoslav-S. Savkevitch   +3 more
core   +1 more source

Dental development in the tropical gar (Atractosteus tropicus) and the evolution of vertebrate dentitions

open access: yesDevelopmental Dynamics, EarlyView.
Abstract Background Dentitions have diversified enormously during vertebrate evolution, involving reductions, modifications, or allocations to prey seizing and processing regions. A combination of ancient and novel features related to dental and oropharyngeal apparatuses is found in extant lineages of non‐teleost fishes, such as the gars.
Anna Pospisilova   +4 more
wiley   +1 more source

Something about amber: Fictive temperature and glass transition temperature of extremely old glasses from copal to Triassic amber

open access: yes, 2013
In previous work we successfully used a stable Dominican amber to investigate the sub-glass transition dynamics of an organic glass with extremely low fictive temperature. The results provided an incentive to seek other stable ambers with lower values of
Gregory B. McKenna   +2 more
core   +1 more source

Ion‐Enriched Porous Organic Polymer for Gold Recovery From E‐Waste

open access: yesEcoEnergy, EarlyView.
A novel ion‐enriched porous organic polymer was designed and synthesized. It exhibits ultrahigh gold adsorption efficiency with capacity up to 1530.9 mg g−1, and also shows selective capture ability towards gold ions in the actual CPU leaching solution, demonstrating its promising potential for gold recovery from actual e‐waste.
Rui Zhang   +8 more
wiley   +1 more source

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