Changes in essential oils (EOs) content and composition of lemon verbena leave at different packaging methods (packaged with air, nitrogen, or under vacuum) and during storage period (0, 2, 4, 6 and 8 months) were determined. All the samples were hydrodistilled every 2 months during storage for EO content evaluation. EO composition was determined by gas chromatography and gas chromatography-mas...

MR-elastography (MRE) was devised in 1995 through magnetic resonance of the proton to detect the motion of tissues and to follow their response to an acoustic stress, generally applied by a mechanical vibrator at the surface of the body. By implementing this technique on a tracer gas hyperpolarized helium-3, we circumvent the SNR limitations of MRE in the airways. However, the gas contained in ...

We present limits on the molecular gas content of Lyman break galaxies (LBGs) at z ∼ 5 from observations targeting redshifted CO(1–0) and CO(2–1) line emission. We observed a single field containing eight spectroscopically confirmed z ∼ 5 LBGs, seven of which are contained within a narrow (z = 4.95±0.08) redshift range and the eighth is at z = 5.2. No source was individually detected. Assuming ...

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Sensitive CO observations are presented for a sample of elliptical galaxies which are luminous X-ray and weak far infrared (FIR) emitters. Only non-detections were obtained. The absence of detectable amounts of CO (this includes the previously ‘detected’ prototypical galaxy NGC4472) does not support those standard cooling flow scenarios in which dust grain sputtering reduces the FIR luminosity,...

We consider the relationship between the total HI mass in late-type galaxies and the kinematic properties of their disks. The mass MHI for galaxies with a wide variety of properties, from dwarf dIrr galaxies with active star formation to giant low-brightness galaxies, is shown to correlate with the product VcR0 (Vc is the rotational velocity, and R0 is the radial photometric disks scale length)...

Post-starburst galaxies, or E+A galaxies, are characterized by optical spectra showing strong Balmer absorption lines, indicating a young stellar population, and little or no emission lines, implying no active star formation. These galaxies are interpreted as a transitional population between star-forming, disc-dominated galaxies and spheroidal quiescent, non-star-forming galaxies. Here, we pre...

We investigate the atomic (HI) and molecular (H2) Hydrogen content of normal galaxies by combining observational studies linking galaxy stellar and gas budgets to their host dark matter (DM) properties, with a physically grounded galaxy formation model. This enables us to analyse empirical relationships between the virial, stellar, and gaseous masses of galaxies and explore their physical origi...

The effect of body posture on regional ventilation during bronchoconstriction is unknown. In five subjects with asthma, we measured spirometry, low-frequency (0.15-Hz) lung elastance, and resistance and regional ventilation by intravenous (13)NN-saline positron emission tomography before and after nebulized methacholine. The subjects were imaged prone on 1 day and supine on another, but on both...

A study on effective thermal conductivity (ETC) of natural ice in a reservoir with <3% gas content and 300 mgL dissolved matter content in the parent water was conducted in a laboratory. Ice sections were prepared to obtain the ice crystal structure, gas bubble content and ice density. Profiles of horizontal and vertical thermal conductivity of ice samples were determined with attention to rela...