A previously undescribed, slowly growing, scotochromogenic mycobacterium was isolated from a patient with symptomatic pulmonary infection during hsp65 sequence-based identification of Korean clinical isolates. Phenetic characteristics of this strain were generally similar to those of Mycobacterium nebraskense and Mycobacterium scrofulaceum. However, some phenetic characteristics differentiated ...

The primordial abundances of deuterium, helium-3, helium-4, and lithium-7 probe the baryon density of the Universe only a few minutes after the Big Bang. Of these relics from the early Universe, deuterium is the baryometer of choice. After reviewing the current observational status of the relic abundances (a moving target!), the baryon density determined by big bang nucleosynthesis (BBN) is der...

The preserved record of decay of now-extinct 129I into 129Xe forms the basis of the I-Xe chronometer. Comparison of the high precision I-Xe and Pb-Pb ages of chondrules and pure mineral phases separated from eight meteorites suggests the 17.5 ÷ 14.6 Ma range for the 129I half-life, assuming that the 235U and 238U half-lives are correct. The mean value of 16 Ma indicates that the 15.7 Ma half-li...

The decay of 182Hf, now extinct, into stable 182W has developed into an important chronometer for studying early solar system processes such as the accretion and differentiation of planetesimals and the formation of the Earth and the Moon. The only 182Hf half-life measurements available were performed 40 years ago and resulted in an imprecise half-life of (9+/-2)x10(6) yr. We redetermined the h...

The study of short-lived, now extinct radionuclides offers constraints on the duration of planetesimal formation and on other processes and events, which took place in the early solar system. The relative chronometers based on the decay of 53Mn to 53Cr (T1/2 = 3.7 m.y.) and of 26Al to 26Mg (T1/2 = 0.73 m.y.) provide an adequate time resolution of at least 1 m.y. A calibration of these relative ...

In order to resolve a recent discrepancy in the half-life of 60Fe, we performed an independent measurement with a new method that determines the 60Fe content of a material relative to 55Fe (t1/2=2.744  yr) with accelerator mass spectrometry. Our result of (2.50±0.12)×10(6)  yr clearly favors the recently reported value (2.62±0.04)×10(6)  yr, and rules out the older result of (1.49±0.27)×10(6)  ...

We combine cosmic chronometer and growth of structure data to derive the redshift evolution dark energy equation state $w$, using a novel agnostic approach. The background perturbation equations lead two expressions for one purely background-based other relying also on rate large-scale structure. compare features performance growth-based $w$ Gaussian Processes reconstructions. find that current...

The possibility of a non-gravitational interaction between the dark matter and energy has been reconstructed using some recent datasets. crucial aspect is that not parametrized at outset, but rather directly from data in non-parametric way. Cosmic Chronometer Hubble data, Pantheon Supernova compilation CANDELS CLASH Multy-Cycle Treasury programs obtained by HST, Baryon Acoustic Oscillation have...