Results 231 to 240 of about 1,035,856 (262)
Efficacy stratification of digital health modalities in home-based cardiac rehabilitation for heart failure: a systematic review and meta-analysis. [PDF]
BMC Cardiovasc DisordZheng Z +6 more
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Association of estimated glomerular filtration rate and in-hospital mortality in patients hospitalized for heart failure: a retrospective cohort study. [PDF]
Front Cardiovasc MedAierken Y +7 more
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Beyond distance and heart rate: Reading 6-minute walk test <i>via</i> blood pressure variability in chronic heart failure. [PDF]
World J Exp MedXing WL, Liu T.
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Chemical Geology, 2003
Abstract Igneous, metamorphic and biogenic apatite contains Lu and Hf in proportions that make this mineral suitable for dating by the 176Lu–176Hf method. We present a new method for separation of Lu and Hf from apatite that involves a single extraction column step for Hf and a second exchange column step for Lu.
Gry H. Barfod +2 more
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Abstract Igneous, metamorphic and biogenic apatite contains Lu and Hf in proportions that make this mineral suitable for dating by the 176Lu–176Hf method. We present a new method for separation of Lu and Hf from apatite that involves a single extraction column step for Hf and a second exchange column step for Lu.
Gry H. Barfod +2 more
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Earth and Planetary Science Letters, 2004
Sm–Nd and Lu–Hf isotopic data are presented for 19 chondritic meteorites: six carbonaceous chondrites, five L-chondrites, seven H-chondrites, and a single enstatite chondrite. The primary goal of the study is to better define the Bulk Silicate Earth (BSE) reference values for Hf isotopes.
P.J Patchett +3 more
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Sm–Nd and Lu–Hf isotopic data are presented for 19 chondritic meteorites: six carbonaceous chondrites, five L-chondrites, seven H-chondrites, and a single enstatite chondrite. The primary goal of the study is to better define the Bulk Silicate Earth (BSE) reference values for Hf isotopes.
P.J Patchett +3 more
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Lu‐Hf constraints on the evolution of lunar basalts
Journal of Geophysical Research: Solid Earth, 1984Very low Ti basalts and green glass samples from the moon show high Lu/Hf ratios and low Hf concentrations. Low‐Ti lunar basalts show high and variable Lu/Hf ratios and higher Hf concentrations, whereas high‐Ti lunar basalts show low Lu/Hf ratios and high Hf concentrations.
Hirokazu Fujimaki, Mitsunobu Tatsumoto
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Dating crustal anatexis in UHT granulites with Lu-Hf
2020<p>Ultra-high temperature (UHT) metamorphism is a thermal regime that can be attained by the lower continental crust in exceptional contexts and that is usually accompanied by fluid-absent dehydration melting. Such conditions are observed in the Gruf Complex, a 12 x 10 km migmatitic body located in the Central Alps, which is ...
Omar Gianola +4 more
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Lu–Hf total-rock isochron for the eucrite meteorites
Nature, 1980The isotope Lu-176 (2.6% of natural lutetium) decays by beta(-) to Hf-176, with a long half life. The first Lu-Hf isochron is presented. The eucrite meteorites, a suite of planetary igneous rocks of known age, 4,550 Myr, define a 10-point total-rock isochron with a slope of 0.0934 + or - 40, leading to a value of 3.53 + or - 0.14 x 10 to the 10th yr ...
P. J. Patchett, M. Tatsumoto
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