نتایج جستجو برای: سنسنجی u pb

تعداد نتایج: 197330  

Journal: :Revista Brasileira de Geociências 1993

Journal: :Proceedings of the Japan Academy, Series B 2002

Journal: :Geophysical Research Letters 1991

Journal: :Geochronology 2021

Abstract. Recent U–Pb dating by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has demonstrated that reasonable precision (3 %–10 %, 2σ) can be achieved for high-resolution of texturally distinct calcite phases. Absolute dolomite, which biostratigraphy and traditional techniques are very limited, remains challenging, although it may resolve many fundamental questions re...

2006
E. M. Valenzuela Y. Abdu R. B. Scorzelli J. B. de Campos M. Duttine P. A. Bland

The lunar meteorites have valuable informations for understanding the evolution of the Moon’s crust, because each meteorite may potentially provide a new insight into the thermal history of unexplored regions of the Moon. In spite of their scientific interests, chronological studies of Very-Low-Ti (VLT) basaltic meteorites have not be well understood, since the most VLT basalt meteorites are br...

2000
Sonja Kabana

Consequences resulting from the DD excess derived indirectly by the NA50 experiment in S+U and Pb+Pb collisions at √ s=19, 17 GeV, relevant for the identification of the QCD phase transition in these collisions, are discussed. The dependence of open and closed charm yields in Pb+Pb collisions on the number of participating nucleons (N) indicates non thermal charm production and J/Ψ dissociation...

Journal: :Leprosy review 2014
Isis Polianna Silva Ferreira Samira Buhrer-Sékula Maria Regina Fernandes De Oliveira Heitor de Sá Gonçalves Maria Araci de Andrade Pontes Maria Lúcia Fernandes Penna Rossilene Cruz Gerson Oliveira Penna

OBJECTIVE To describe the profile of patients who participated in the Randomised Clinical Trial for Uniform Multidrug Therapy for Leprosy Patients in Brazil (U-MDT/CT-BR) and determine the level of satisfaction with a uniform therapy regimen, especially among paucibacillary patients. DESIGN This is a descriptive cross-sectional epidemiologic study nested in the wider U-MDT/CT-BR. The study wa...

2000
Sonja Kabana

Consequences resulting from the DD excess derived indirectly by the NA50 experiment in S+U and Pb+Pb collisions at √ s=19, 17 GeV, relevant for the identification of the QCD phase transition in these collisions, are discussed. The dependence of open and closed charm yields in Pb+Pb collisions on the number of participating nucleons (N) indicates non thermal charm production and J/Ψ dissociation...

2014
C. A. Crow K. D. McKeegan D. E. Moser

Introduction: Zircon is a late stage accessory mineral that incorporates radiogenic parents such as uranium and thorium, while preferentially excluding their daughter product lead, allowing for precise U-Pb and Pb-Pb ages to be determined for individual grains [1]. Zircons also incorporate other trace elements such as the rare earth elements (REEs) and titanium, which can reflect the compositio...

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