Results 61 to 70 of about 61,957 (184)

Industrial mineral resources of Zambia [PDF]

, 2000
Zambia has for many years been heavily dependent upon the mining of copper which, combined with cobalt production, represents over 98% of mineral sales and 75% of export earnings (1997 figures).
Mitchell, Clive
core  

Outgassing of Ordinary Chondritic Material and Some of its Implications for the Chemistry of Asteroids, Planets, and Satellites [PDF]

, 2006
We used chemical equilibrium calculations to model thermal outgassing of ordinary chondritic material as a function of temperature, pressure, and bulk compositions and use our results to discuss outgassing on asteroids and the early Earth.
Abe, Ahrens, Alexander, Allen, Ansdell, Aston, Belov, Brearley, Breger, Brett, Britt, Brown, Bruce Fegley, Chipman, Chipman, Consolgmano, Craig, Delano, Dodd, Dreibus, Fegley, Fegley, Fegley, Funkhouser, Gaffey, Garrison, Ghosh, Gibson, Gibson, Gibson, Gibson, Gooding, Grady, Hart, Hashizume, Hashizume, Hashizume, Hashizume, Hutchison, Jarosewich, Kaplan, Kargel, Kasting, Kasting, Keller, Kothari, Kress, Krot, Kuhn, Kung, Lange, Larimer, Laura Schaefer, Lee, Lewis, Lodders, Lodders, Mason, Mason, McNaughton, McNaughton, McSween, McSween, McSween, Menzies, Merrill, Merrill, Michalak, Miller, Miller, Moore, Mostefaoui, Mueller, Muenow, Müller, Nash, O'Neill, Oparin, Oró, Pavlov, Prinn, Ramdohr, Richardson, Rietmeijer, Robert, Robert, Robert, Robie, Rubin, Rubin, Russell, Sagan, Saxena, Schaefer, Schaefer, Schaefer, Schaefer, Schaefer, Slater-Reynolds, Spear, Stribling, Sugiura, Tian, Travers, Urey, Van Zeggern, Vdovykin, Von Seckendorff, Wada, Walter, Wasson, Williams, Wilson, Wänke, Yang, Zahnle   +115 more
core   +2 more sources

Problems and Solutions when Quantifying Nitrogen in Silicate and Oxide Minerals and Glasses Using Electron Probe Microanalysis

Geostandards and Geoanalytical Research, EarlyView.
Key Points The challenges of quantifying nitrogen in silicates by EPMA are explained and assessed. Using a set of known and newly synthesised reference materials, we demonstrate a method for obtaining accurate nitrogen mass fractions in most samples.
Eleanor R. Mare, Jeff Chen, Iris Buisman, Chris Hayward, Antony D. Burnham, Caterina Melai, Eva E. Stüeken, Geoffrey Bromiley, Sami Mikhail   +8 more
wiley   +1 more source

Transcription activator‐like effectors of Xanthomonas oryzae pv. oryzae hijack host transcriptional regulation through OsWRKYs

Journal of Integrative Plant Biology, EarlyView.
TALEs from Xanthomonas oryzae pv. oryzae enter rice cells via the Type III secretion system and manipulate OsWRKY transcription factors. The TALE Xoo1219 activates OsWRKY104, enhancing susceptibility by inducing OsSWEET genes, and Xoo2145 activates OsWRKY55, which suppresses defense via OsWRKY62.
Jong Hee Im, Naeyeoung Choi, Jinjeong Lee, Man‐Young Jung, Sang Ryeol Park, Duk‐Ju Hwang   +5 more
wiley   +1 more source

Cognition in spiders: Small brains on eight legs gain traction

Journal of Zoology, EarlyView.
Spiders are excellent subjects for studying sensory detection, cognition, and perception ‐ the central topics of this 2025 Thomas Henry Huxley Review by Prof. Ximena Nelson, based at the University of Canterbury in New Zealand. Their complex behaviours, advanced sensory systems (including chemoreception, vibrations, and vision), and problem‐solving ...
X. J. Nelson
wiley   +1 more source

Why ignore expiry dates on cosmetics? A qualitative study of perceived risk and its implications for cosmetics producers and regulators

Risk Analysis, EarlyView.
Abstract Consumers often use cosmetics long after their expiry date, despite the health risk. This paper aims to understand why and to suggest policy changes that can promote safer practices in cosmetics use. This is the first study to investigate risk perception in relation to expired cosmetics.
Yujiao Wang, Gary Davies, James Derbyshire, Farid Ullah   +3 more
wiley   +1 more source

Formation of Mg‐silicates in the microbial sediments of a saline, mildly alkaline coastal lake (Lake Clifton, Australia): Environmental versus microbiological drivers

Sedimentology, EarlyView.
ABSTRACT Recent interest in Mg‐rich silicate formation stems from its role as a valuable palaeoclimatic indicator in fluvio‐lacustrine environments and its insights into metal geochemical cycling. Traditionally, Mg‐silicate genesis in lacustrine contexts is linked to alkaline or saline conditions in closed, evaporitic basins.
Ramon Mercedes‐Martín, Mónica Sánchez‐Román, Carlos Ayora, Mike Rogerson, Camille Thomas, Rob Van Spanning, Alex Brasier, David Wacey, John J. G. Reijmer   +8 more
wiley   +1 more source

Material properties of nanoclay PVC composites [PDF]

, 2009
Nanocomposites of poly(vinyl chloride) have been prepared using both hectorite- and bentonite-based organically-modified clays. The organic modification used is tallow-triethanol-ammonium ion.
Awad, Walid, Benderly, Daphne, Beyer, Gunter, Ijdo, Wouter L., Jimenez-Gasco, Maria del Mar, Manias, Evangelos, Songtipya, Ponusa, Wilkie, Charles A.   +7 more
core   +1 more source

Avicenna on the PSR and Causal Necessity in the Natural World

Theoria, EarlyView.
ABSTRACT Avicenna's account of causal necessity in the natural world is a key part of his metaphysical system and it is also historically significant. Yet, there is little scholarly discussion of the philosophical basis of his view. This is surprising not only because the topic is important, but also because the view is challenging to interpret ...
Kara Richardson
wiley   +1 more source

The tourist area lifecycle and the unit roots test. A new economic perspective for a classic paradigm in tourism. [PDF]

As many traditional tourist destinations have experienced a slow down in tourist arrivals and expenditure, Butler’s (1980) Tourist Area Life Cycle (TALC) model seems to attract new attention from tourist researchers. The TALC describes the evolution of a
Andreu Sansó Rosselló, Antoni Luis Alcover Casasnovas   +1 more
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