INTRODUCTION Lead (Pb) is known to affect bone, and recent evidence suggests that it has effects on cartilage as well. As osteoarthritis (OA) is a highly prevalent disease affecting bone and cartilage, we undertook the present analysis to determine whether whole blood Pb levels are associated with radiographic and symptomatic OA (rOA and sxOA, respectively) of the knee. METHODS The analysis w...

Results of a systematic study of fully integrated particle multi-plicities in central Au–Au and Pb–Pb collisions at beam momenta of 1.7A GeV, 11.6A GeV (Au–Au) and 158A GeV (Pb–Pb) using a statistical-thermal model are presented. The close similarity of the colliding systems makes it possible to study heavy ion collisions under definite initial conditions over a range of centre-of-mass energies...

Introduction: The Mn-Cr analyses of several H chondrites including Forest Vale, Dimmitt, Ste Mar-guerite and Richardton [1-3], have all shown reasonable agreement between the obtained 'Mn-Cr ages' and the known Pb-Pb ages determined on phosphates. These studies imply that the best fit lines in the 53 Mn-53 Cr evolution plots for these meteorites are isochrons rather than mixing lines and that t...

The Precambrian rocks in western Ethiopia consist of highand low-grade terranes intruded by granitoids with a wide compositional spectrum. The formation ages of these granitoid rocks are, so far, poorly understood. Single-grain zircon Pb/Pb evaporation and conventional U/Pb dating conducted on four granitoids places time constraints on their emplacement and tectonothermal events. Three granitoi...

Abstract. Zircon U–Pb geochronology is a staple of crustal evolution studies and sedimentary provenance analysis. Constructing (detrital) age spectra straightforward for concordant 206Pb/238U 207Pb/206Pb compositions. But unfortunately, many datasets contain significant proportion discordant analyses. This paper investigates two decisions that must be made when analysing such data. First, the a...

The Pb isotopic compositions of maskelynite and pyroxene grains were measured in ALH84001 and three enriched shergottites (Zagami, Roberts Massif 04262, and Larkman Nunatuk 12011) by secondary ion mass spectrometry. A maskelynite-pyroxene isochron for ALH84001 defines a crystallization age of 4089 ± 73Ma (2σ). The initial Pb isotopic composition of each meteorite was measured in multiple maskel...

Abstract. The age of ore deposits constitutes a decisive element in understanding their formation. Deciphering precise chronology may be challenge the absence mineral phases that can dated by conventional geochronometers. Fluorite is very common either as major or accessory wide variety ores and provide information regarding origin timing mineralizing fluid flows. In this contribution, we explo...