Results 51 to 60 of about 3,971,013 (395)

Discovery Prospects for a Supernova Signature of Biogenic Origin

, 2011
Approximately 2.8 Myr before the present our planet was subjected to the debris of a supernova explosion. The terrestrial proxy for this event was the discovery of live atoms of 60Fe in a deep-sea ferromanganese crust.
Basu, Bazylinski, Bosch, de Baar, Egli, Egli, Egli, Faivre, Fields, Fitoussi, Jickells, Knie, Knie, Knie, Knie, Kopp, Limongi, Limongi, Moskowitz, Nomoto, R. Egli, Rauscher, Roden, Rugel, S. Bishop, Wang, Woosley, Zachara   +27 more
core   +1 more source

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Molecular characteristic of phosphoric acid treated soils [PDF]

, 2010
The expansive nature of soils containing high amounts of clay minerals can be altered through chemical stabilization, resulting in a material suitable for construction purposes. The primary objective of this investigation was to study the changes induced
A., Eisazadeh, H., Nur, K. A., Kassim
core  

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Magnetic Mineralogy of Speleothems From Tropical-Subtropical Sites of South America

Frontiers in Earth Science, 2021
Fe-bearing minerals are a tiny fraction of the composition of speleothems. They have their origin in the karst system or are transported from the drainage basin into the cave.
Plinio Jaqueto, Ricardo I. F. Trindade, Joshua M. Feinberg, Janine Carmo, Valdir F. Novello, Nicolás M. Stríkis, Francisco W. Cruz, Marília H. Shimizu, Ivo Karmann   +8 more
doaj   +1 more source

Biomineralization of magnetic minerals [PDF]

Reviews of Geophysics, 1995
New developments and discoveries in biomineralization have occurred almost continuously in the intervening decade since the previous IUGG quadrennial report on biomineralization and biomagnetism was published [Kirschvink, 1983]. Biomineralization is widespread in the biosphere and over 60 different inorganic minerals are produced by a variety of ...
openaire   +2 more sources

Magnetic Resonance Microscopy of Collagen Mineralization [PDF]

Biophysical Journal, 2008
A model mineralizing system was subjected to magnetic resonance microscopy to investigate how water proton transverse (T(2)) relaxation times and magnetization transfer ratios can be applied to monitor collagen mineralization. In our model system, a collagen sponge was mineralized with polymer-stabilized amorphous calcium carbonate. The lower hydration
Chesnick, Ingrid E., Mason, Jeffrey T., Giuseppetti, Anthony A., Eidelman, Naomi, Potter, Kimberlee   +4 more
openaire   +2 more sources

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source

Magnetic Susceptibility Record in Paleozoic Succession (Rhenohercynian Massif, Northern Europe) – Disentangling Sea Level, Local and Diagenetic Impact on the Magnetic Records

Frontiers in Earth Science, 2019
This study uses an integrated approach, including sedimentology, geochemistry and hysteresis magnetic measurements on a million year Givetian sequence in the southern margin of the Ardennes carbonate platform (France) to test the reliability of magnetic ...
Damien Pas, Damien Pas, Anne-Christine Da Silva, Geoffrey Poulain, Simo Spassov, Frédéric Boulvain   +5 more
doaj   +1 more source

INTERPRETASI DATA GEOMAGNETIK UNTUK MENDETEKSI SEBARAN BATUAN MENGANDUNG MINERAL LOGAM DI AWANG BANGKAL, KABUPATEN BANJAR

Al-Ulum, 2022
Research has been carried out to detect the presence and distribution of rocks containing metallic minerals. Almost every object used every day contains metal elements, so the presence of metal is very important to support every human activity.
rudy hendrawan noor, Ishaq Ishaq
doaj   +1 more source