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Spirometry was used to assess airway obstruction using a Keystone dry-rolling seal spirometer (S&M Instruments, Louisville, CO, USA).
Chromatographic separations were achieved using a Keystone Betasil C-18 column (50 mm × 2 mm, 3 μm particle size) (Thermo Hypersil, Madison, WI, USA).
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Keystone also uses a gray keystone -- the trapezoid-shaped middle stone in an arch -- in its labeling.
Cooper said he mapped out his entire Nebraska trip by using a maps of the Keystone Pipeline System he found online. .
Therefore the rationale of this study was to bridge this gap and evaluate this second keystone by using a near complete large data collection of matched test data sources in the target region for the chlamydia screening programme.
As a review of the derivation of Eq. (1.1), we will show the Darcy law q ( x, t ) = K ̲ ̲ [ Φ ( x, t ) ] (1.2). is used as a keystone in the derivation of Eq. (1.1).
The ages of its larvae are commonly used as a keystone to achieve accurate PMI of bodies [ 9].
Declaring a conflict-of-interest does not imply wrongdoing, but if a significant conflict-of-interest exists, a research study should be carefully scrutinized before being used as a keystone of healthcare policy formulation.
The metabolites in the urine extract were chromatographically resolved by high-performance liquid chromatography (HPLC) using a Surveyor HPLC system (ThermoFinnigan, San Jose, CA) equipped with a Betasil phenyl HPLC column (3 μm, 100 mm × 2.1 mm; ThermoHypersil-Keystone, Bellefonte, PA) using a nonlinear water:acetonitrile solvent gradient.
The analytes were separated on a C18 Betasil column (2.1 × 50 mm, Thermo Hypesil-Keystone, Bellafonte, PA, USA) using an Agilent 1100 Series HPLC (Agilent Technologies, Palo Alto, CA).
However, using Keystone as a bargaining chip in the negotiations to extend the payroll tax will likely not be fruitful; Democrats on the committee are likely to reject the idea out of hand, and Republicans will have to use legislation in their chamber to further push the matter.
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