Results 91 to 100 of about 1,197 (262)

Molecular and morphological analyses of avian eggshell excavated from a late thirteenth century earth oven

, 2011
Using ancient DNA (aDNA) extracted from eggshell of the extinct moa (Aves: Dinornithiformes) we determined the species composition and number of eggs found in a late thirteenth century earth oven feature at Wairau Bar (South Island, New Zealand) - one of
Holdaway, R.N., Michael Bunce, Richard Walter, Walter, R., Chris Jacomb, Haile, James, Paul Scofield, R., Oskam, C., Morten E. Allentoft, Oskam, C.L., Haile, J., Holdaway, R., Allentoft, M.E., Richard N. Holdaway, James Haile, Charlotte L. Oskam, R. Paul Scofield, Allentoft, M., Scofield, R., Jacomb, C., Bunce, M., Bunce, Michael   +21 more
core   +1 more source

From subduction to collision in the northern Tibetan plateau : evidence from the early Silurian clastic rocks, northwestern China [PDF]

, 2012
The Qilian Orogen records early Paleozoic collisional suturing of the Qaidam Block and the Central Qilian Block to the North China Craton. The composition and U-Pb age of detrital zircons and the composition of Cr-spinels from the Early Silurian ...
Jianghai Yang, Peter A. Cawood, Yuansheng Du, Yajun Xu, Yang, Jianghai, Xu, Yajun, Cawood, Peter A., Du, Yuansheng   +7 more
core   +1 more source

Seawater redox variations during the deposition of the Kimmeridge Clay Formation, United Kingdom (Upper Jurassic): evidence from molybdenum isotopes and trace metal ratios [PDF]

, 2010
The Kimmeridge Clay Formation (KCF) and its equivalents worldwide represent one of the most prolonged periods of organic carbon accumulation of the Mesozoic.
Pearce, Christopher R., Cohen, Anthony S., Coe, Angela L., Christopher R. Pearce, Angela L. Coe, Anthony S. Cohen   +5 more
core   +1 more source

Amino acid racemization dating: Method development using African ostrich (Struthio camelus) eggshell [PDF]

, 2013
Ostrich eggshell (OES) is ubiquitous in archaeological sites in Africa and is a favoured substrate for amino acid racemisation (AAR) geochronology, yielding consistent results and thought to approximate a closed system with respect to protein diagenesis.
Crisp, Molly Katherine
core  

Dissecting the Re-Os molybdenite geochronometer [PDF]

, 2017
Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS2), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium.
Kilburn, M.R., Malcolm P. Roberts, Kilburn, Matt R., Deditius, A., Roberts, M.P., Guagliardo, P., Roberts, Malcolm P., Barra, F., Artur Deditius, Matt R. Kilburn, Martin Reich, Fernando Barra, Deditius, Artur P., Barra, Fernando, Guagliardo, Paul, Paul Guagliardo, Reich Morales, Martín, Reich, M.   +17 more
core   +1 more source

Long‐term prognosis is associated with residual disease after neoadjuvant systemic therapy but not with initial nodal status

BJS (British Journal of Surgery), EarlyView., 2020
This long‐term follow‐up study determined survival rates in a Swedish national cohort of 417 patients with breast cancer who all had neoadjuvant systemic therapy (NAST). Sentinel lymph node biopsy (SLNB) was performed before NAST in clinically node‐negative and after NAST in clinically node‐positive patients.
L. Zetterlund, F. Celebioglu, T. Hatschek, J. Frisell, J. de Boniface   +4 more
wiley   +1 more source

European multicentre study on outcome of surgery for sporadic primary hyperparathyroidism

BJS (British Journal of Surgery), EarlyView., 2020
Some 5861 patients undergoing first‐time surgery for sporadic primary hyperparathyroidism were registered in the Eurocrine® database between 2015 and 2018. The use of intraoperative parathyroid hormone measurement decreased the risk of conversion and persistent hypercalcaemia.
A. Bergenfelz, S. van Slycke, Ö. Makay, L. Brunaud   +3 more
wiley   +1 more source

Isotopic dating and geochemical characterization of petroleum system events: case studies from the McArthur, Tarim and Sichuan Basins [PDF]

, 2019
This PhD project has examined the behaviour and applicability of Re-Os and Rb-Sr isotope systems for dating and characterizing petroleum systems. Through case studies of ancient petroleum systems in the McArthur, Tarim and Sichuan Basins, outcomes of the
Li, Shaojie
core  

Origin of the Xulaojiugou Pb–Zn Deposit, Heilongjiang Province, NE China: Constraints from Molybdenite Re–Os Isotopic Dating, Trace Elements, and Isotopic Compositions of Sulfides

Minerals
The Xulaojiugou Pb–Zn deposit, situated in the eastern Xing’an-Mongolia Orogenic Belt (XMOB), represents a medium-scale Pb–Zn deposit in central Heilongjiang Province, NE China. The mineralization occurs mainly near the contact zone of porphyritic biotite granite, medium-grained monzogranite, and marble in the Early Cambrian Qianshan Formation ...
Gan Liu, Yunsheng Ren, Jingmou Li, Wentan Xu   +3 more
openaire   +1 more source

Electroenzymatic CO2 Fixation

Angewandte Chemie International Edition, EarlyView.
Electroenzymatic CO2 fixation enables energy‐efficient, highly selective synthesis of complex molecules. Unlocking its full potential requires fundamental understanding of electrode‐coupled reductases and carboxylases. This review critically discusses available enzymes, product scope, and key thermodynamic and kinetic considerations, highlighting ...
Leonardo Castañeda‐Losada, Michael Richter, Christophe Léger, Vincent Fourmond, Nicolas Plumeré   +4 more
wiley   +1 more source