Results 61 to 70 of about 921,071 (254)

Xylose Acetals ‐ a New Class of Sustainable Solvents and Their Application in Enzymatic Polycondensation

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Novel organic solvents with an unmodified carbohydrate core were synthesised both from D‐xylose and directly from biomass and were successfully used as reaction media for lipase biocatalysts to synthesise aliphatic and aromatic polyesters. Abstract The use of organic solvents in academic research and industry applications is facing increasing ...
Anastasia O. Komarova, Cicely M. Warne, Hugo Pétremand, Laura König‐Mattern, Johannes Stöckelmaier, Chris Oostenbrink, Georg M. Guebitz, Jeremy Luterbacher, Alessandro Pellis   +8 more
wiley   +1 more source

Amphibole–melt disequilibrium in silicic melt of the Aso-4 caldera-forming eruption at Aso Volcano, SW Japan

Earth, Planets and Space, 2018
The most recent and largest caldera-forming eruption occurred at ~ 90 ka at Aso Volcano, SW Japan, and is known as the “Aso-4 eruption.” We performed chemical analyses of amphibole phenocrysts from Aso-4 pyroclasts collected from the initial and largest ...
Hidemi Ishibashi, Yukiko Suwa, Masaya Miyoshi, Atsushi Yasuda, Natsumi Hokanishi   +4 more
doaj   +1 more source

Orthodentine‐osteodentine and osteocytic‐anosteocytic transition inferred from Silurian stem chondrichthyan dermal jawbones with ever‐white teeth overgrown by brown denticles

Developmental Dynamics, EarlyView.
Abstract Background The dentigerous jawbones of a 423‐million‐year‐old stem chondrichthyan (ischnacanthid acanthodian) carry a characteristic combination of multi‐row non‐shedding white teeth with brownish overgrowing denticles. The color distinction makes it a good model for observing the interaction between two odontode lineages, but the nature of ...
Jia‐Cih Kang, Henning Blom, Tiiu Märss, Donglei Chen   +3 more
wiley   +1 more source

Rapakivi K‐Feldspar Megacrysts in Monzogranitic Porphyry: Evidence for Magma Recharge and Mush Rejuvenation

Geochemistry, Geophysics, Geosystems
The formation, storage, and evolution of granitic magmas are fundamental processes driving the growth of continental crust. While traditionally attributed to crystal fractionation in high‐melt fraction magma chambers, the model invoking low‐melt fraction
Wang Li, Xuxuan Ma, Roberto Weinberg, Liang Qiu, Zhiyong Zhu, Haibing Li   +5 more
doaj   +1 more source

Orientation controlling of Ni-based single-crystal superalloy by a novel method: grain selection assisted by un-melted reused seed

Journal of Materials Research and Technology, 2019
A new grain selection method assisted by un-melted short seed was proposed to control the primary and secondary orientations of Ni-based single-crystal superalloy.
Wenchao Yang, Songsong Hu, Miao Huo, Dejian Sun, Jun Zhang, Lin Liu   +5 more
doaj   +1 more source

Ambient Electrosynthesis of Pure 15 wt% H2O2 Without Salt Using an Ultrathin Metal–Organic Framework Nanosheet Featuring Dicopper(I) Active Sites

EcoEnergy, EarlyView.
An ultrathin metal–organic framework nanosheet with exposed dicopper(I) active sites enables ambient electrosynthesis of pure, salt‐free 15 wt% H2O2, achieving ∼95% Faradaic efficiency, 350 mA cm−2 current density, and over 50 h of stable operation in a solid‐electrolyte system.
Ze‐Wei Chai, Pei‐Qin Liao
wiley   +1 more source

Melt extraction with crystal entrainment from basaltic crystal mush, causing a dacitic pumice eruption from the mafic-dominant Iwate volcano, northern Honshu

Earth, Planets and Space
The structure and evolution of the magma plumbing system that produced the dacitic Yukiura Pumice (YP) at Iwate volcano, northern Honshu, are constrained by petrography and rhyolite–MELTS simulations. The basaltic Yukiura Scoria (YS) eruption immediately
Tsukasa Ohba, Masamichi Ikeda, Akira Chiba, Arata Murayama   +3 more
doaj   +1 more source

Integrated Solvent‐Catalyst‐Dopant Strategy via Acidic DES for Synthesizing Lignin‐Derived Carbon Dots With High‐Quantum Yield to Achieve Efficient Photocatalytic Degradation of Tetracycline

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A deep eutectic solvent (ChCl/pTSA) platform enables integrated solvent, catalyst, and dopant functions, producing sulfur‐doped carbon quantum dots with a high sp2‐C content (82.8%) and a quantum yield of 56.9%. When combined with TiO2, the CQDs form TiOC and TiOS interfacial bridges, achieving 97.3% tetracycline photodegradation with excellent ...
Xinhang Li, Haipeng Guo, Suen Hou, Fenghua Huang, Hailong Yu   +4 more
wiley   +1 more source

Apatite Textures, Elemental and Isotopic Compositions Unmask the Homogenizing Process in Silicic Magma Chambers

Geophysical Research Letters
Silicic magmas are the most viscous of all magmas, however some granitic plutons display remarkably homogeneous compositions, which contradicts the hypothesis that mechanical mixing is the main homogenizing process in the magma chamber. Thus much remains
Jian Xu, Xiao‐Ping Xia, Qiang Wang, Christopher J. Spencer, Le Zhang, Xin Zhu   +5 more
doaj   +1 more source

Magmatic to solid-state evolution of a shallow emplaced agpaitic tinguaite (the Suc de Sara dyke, Velay volcanic province, France): implications for peralkaline melt segregation and extraction in ascending magmas [PDF]

European Journal of Mineralogy
In the last decades the mush model has been generalized to the complete trans-crustal magmatic system in which differentiation would be driven by segregation and extraction of trapped melts from crystal-rich mushes. Melt extraction processes involved are
T. Pereira, L. Arbaret, J. Andújar, M. Laumonier, M. Spagnoli, C. Gumiaux, G. Laurent, A. Slodczyk, I. Di Carlo   +8 more
doaj   +1 more source