Results 111 to 120 of about 249,137 (281)

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, EarlyView.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source

Soil chemistry dataset from the work "Modelling and prediction of major soil chemical properties with Random Forest: machine learning as tool to understand soil-environment relationships in Antarctica"

, 2023
Rafael Gomes Siqueira, Cássio Marques Moquedace dos Santos, Márcio Rocha Francelino, Carlos Ernesto Gonçalves Reynaud Schaefer, Elpı́dio Inácio Fernandes Filho   +4 more
openalex   +1 more source

Hydrochemical Characteristics of Four Retreating Glacier Forefields Off the Coast of Admiralty Bay (King George Island, Maritime Antarctic): Diverse Sources of Metals and Metalloids

Land Degradation &Development, EarlyView.
ABSTRACT This study examines the impact of geological, marine and anthropogenic sources on metal and metalloid concentrations in the forefields of four glaciers (Ecology, Sphinx, Tower and Windy) on King George Island, Antarctic. Water samples were collected at the beginning and end of the hydrological season (austral summer, December 2021 to February ...
Joanna Potapowicz, Krystyna Kozioł, Joanna Plenzler, Robert Józef Bialik, Justyna Dudek, Marcin Frankowski, Anetta Zioła‐Frankowska, Sara Lehmann‐Konera, Żaneta Polkowska   +8 more
wiley   +1 more source

Geostatistical estimation from radar altimeter data with respect to morphological units outlined by SAR data: application to Lambert Glacier/Amery Ice Shelf, East Antarctica [PDF]

, 2004
Ralf Stosius, U. C. Herzfeld
openalex   +1 more source

Sex Ratios at Birth Following Non‐Invasive Prenatal Testing in Victoria, Australia

Prenatal Diagnosis, EarlyView.
ABSTRACT Objective Non‐invasive prenatal testing (NIPT) can determine fetal chromosomal sex early in pregnancy, raising the possibility of sex selection. However, current evidence regarding this practice is limited. Our objective was to assess the sex ratio at birth (SRB) among a cohort of infants born following NIPT from a single laboratory provider ...
Hilary Bowman‐Smart, Christopher Gyngell, Lisa Hui, Cara Mand, Mark D. Pertile, Julian Savulescu, Martin B. Delatycki   +6 more
wiley   +1 more source

Magellan Bryozoa: a review of the diversity and of the Subantarctic and Antarctic zoogeographical links

Scientia Marina, 1999
Based principally on previous work by the author, the Magellan Bryozoa are reviewed in terms of endemism, specific diversity, zoarial diversity and polymorphism.
H. I. Moyano G.
doaj   +1 more source

Synthesis of Poly(Itaconate)s With High Monomer Conversion Applying Emulsion Polymerization

Journal of Polymer Science, Volume 63, Issue 6, Page 1284-1296, 15 March 2025.
Itaconic acid and its derivatives are a promising and bio‐based substitute for oil‐based polymers such as acrylates. In this study, the optimization of polymerization of itaconic acid esters is described by applying emulsion polymerization leading to high reaction conversions and low residual monomer contents. ABSTRACT Itaconic acid and its derivatives
S. Charlotte Fischer von Mollard, Nico Ueberschaar, Martin Schreiber, Frank Kamphuis, Stefan Zechel, Martin D. Hager   +5 more
wiley   +1 more source

THE NINTH CIRCLE: A MEMOIR OF LIFE AND DEATH IN ANTARCTICA, 1960–1962. John C. Behrendt. 2005. Albuquerque: University of New Mexico Press. xiv + 240 p, illustrated, hard cover. ISBN 0-8263-3425-3. $US29.95 [PDF]

, 2006
C. Bull
openalex   +1 more source

D‐Optimal Design for Enzymatic Ring‐Opening Polymerization of ε‐Caprolactone: Toward Sustainable Polyester Synthesis Using Biobased Solvents

Journal of Polymer Science, EarlyView.
A D‐optimal design of experiments maps the influence of key reaction parameters on enzymatic ε‐caprolactone polymerization. Thus linking multivariate conditions to conversion, molar mass characteristics, and by‐product formation, whilst demonstrating that biobased solvents offer viable, sustainable media for polyester synthesis.
Emily G. Dixon, Emily Chau, Luisa Ciano, Anca Pordea, Karen Alvey, Vincenzo Taresco   +5 more
wiley   +1 more source

Isolation of extremely halotolerant cocci from Antarctica [PDF]

, 1992
Barbara Nicolaus
openalex   +1 more source