نتایج جستجو برای: lead pb

تعداد نتایج: 366110  

2004
K. Mezger

Based on lithological, structural and geophysical characteristics, the Proterozoic Grenville Orogen of southern Ontario and New York has been divided into domains that are separated from each other by ductile shear zones. In order to constrain the timing of metamorphism, U-Pb ages were determined on metamorphic and igneous sphenes from marbles, calc-silicate gneisses, amphibolites, granitoids, ...

Journal: :Anticancer research 2007
Marco Danova Katia Bencardino Mariangela Manzoni Donatella Grasso Sara Mariucci Bianca Rovati

BACKGROUND No exhaustive data are available on the in vivo biological effects of pegfilgrastim utilized in dose-dense chemotherapy (CT). The cytokinetic effects exerted in a multicyclic CT program by this cytokine on CD34+/38+ peripheral blood (PB) progenitor cells was the focus of this study. PATIENTS AND METHODS PB samples from 19 breast cancer patients treated with 4 courses of docetaxel a...

2002
James K. Mortensen

In this paper we report U-Pb zircon and titanite data and interpreted ages for sixteen rocks (Figure 1) sampled in support of regional mapping projects conducted by the British Columbia Geological Survey Branch during the midto late-1990s. Each sample is reported with geological context, interpretation of U-Pb data and significance of the date. The U-Pb results are also displayed on standard co...

2013
Jin-Wook Lee Dae-Yong Son Tae Kyu Ahn Hee-Won Shin In Young Kim Seong-Ju Hwang Min Jae Ko Soohwan Sul Hyouksoo Han Nam-Gyu Park

The reported photocurrent density (J(SC)) of PbS quantum dot (QD)-sensitized solar cell was less than 19 mA/cm(2) despite the capability to generate 38 mA/cm(2), which results from inefficient electron injection and fast charge recombination. Here, we report on a PbS:Hg QD-sensitized solar cell with an unprecedentedly high J(SC) of 30 mA/cm(2). By Hg(2+) doping into PbS, J(SC) is almost doubled...

2002

D. BARNA for the NA49 Collaboration Central Research Institute for Physics, Konkoly-Thege út 29-33, H-1121, Budapest, Hungary In order to quantify isospin effects in the comparison of elementary to nuclear collisions, p-p and n-p interactions have been studied in the NA49 experiment in addition to p-Pb and PbPb reactions. Together with first measurements of cascade hyperon and Ω production in p...

Journal: :iranian biomedical journal 0
مریم شعبانی maryam shabani محسن آنی mohsen ani احمد موحدین ahmad movahedian سید ضیاء الدین صمصام شریعت seyed ziyae aldin samsam shariat

background: myeloperoxidase (mpo), which is abundantly expressed in neutrophils, catalyzes the formation of a number of reactive oxidant species. however, evidence has emerged that mpo-derived oxidants contribute to tissue damage and initiation and propagation of inflammatory diseases, particularly, cardiovascular diseases. therefore, studying the regulatory mechanisms of the enzyme activity is...

2013
Zi-Fu Zhao Li-Qun Dai Yong-Fei Zheng

Findings of coesite and microdiamond in metamorphic rocks of supracrustal protolith led to the recognition of continental subduction to mantle depths. The crust-mantle interaction is expected to take place during subduction of the continental crust beneath the subcontinental lithospheric mantle wedge. This is recorded by postcollisional mafic igneous rocks in the Dabie-Sulu orogenic belt and it...

Journal: :Dalton transactions 2013
Suping Bao Wangping Qin Qihua Wu Guodong Liang Fangming Zhu Qing Wu

Ultrathin metal coordination Prussian blue (PB) nanoribbons with tunable width have been successfully synthesized. The morphology and microstructure of PB nanoribbons are characterized using UV-vis, FT-IR, AFM, TEM and XRD. PB nanoribbons synthesized possess an ultrathin thickness of approximately 1 nm and narrow width. The width of PB ribbons can be tuned by varying the chain length of polymer...

Journal: :British journal of industrial medicine 1981
J Chmielnicka E Komsta-Szumska J A Szymańska

In a group of 60 workers occupationally exposed to lead the blood and urine lead concentrations, haematocrit, ALA-D and arginase activities, and urinary 5-aminolaevulinic acid (ALA) and coproporphyrin concentrations, and kallikrein activity were determined. Correlation coefficients of -0.78 and 0.77 for Pb-B/ALA and Pb-B/arginase were found respectively for lead concentrations above 40 microgra...

2009
T. Niihara H. Kaiden K. Misawa

Introduction: The age significance of isotope chronometers in basaltic shergottites is not agreed yet [1-3]. Bouvier et al. [3] argued that crystallization ages of shergottites were old (~4.1 Ga), and suggested that young ages of shergottites (i.e., ~180 Ma) represent reset by shock metamorphism. Baddeleyite (ZrO 2) is an important mineral for U-Pb dating of basaltic shergottites. By compressio...

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