We present observations of circumstellar millimetrewave 13CO line emission towards a sample of 20 cool carbon stars. Using a detailed radiative transfer model we estimate the circumstellar 12CO/13CO-ratios, which we believe accurately measure the important stellar 12C/13C-ratios. For those optically bright carbon stars where it is possible, our derived 12C/13Cratios are compared with the photos...

Aims. Photodissociation by UV light is an important destruction mechanism for carbon monoxide (CO) in many astrophysical environments, ranging from interstellar clouds to protoplanetary disks. The aim of this work is to gain a better understanding of the depth dependence and isotope-selective nature of this process. Methods. We present a photodissociation model based on recent spectroscopic dat...

The effect of coherency WC/Co phase boundaries on the fracture toughness of the nanocrystalline WC-Co cemented carbides is studied by MD simulation method. The simulation results show that the nanocrystalline WC-Co cemented carbides with coherency WC/Co phase boundaries has higher fracture toughness than that without coherency WC/Co phase boundaries. Moreover, the mechanism of why coherency WC/...

We explore the infrared M-band (4.7 lm) spectrum of the Class I protostar L1489 IRS in the Taurus molecular cloud. This is the highest-resolution wide-coverage spectrum at this wavelength of a low-mass protostar observed to date (R = 25,000; Dv = 12 km s 1). A large number of narrow absorption lines of gasphase 12CO, 13CO, and C18O are detected, as well as a prominent band of solid 12CO. The ga...

AIM To compare the maximal power output (MPO) of subjects presenting a central adiposity to those of controls and to study the links between plasma leptin or indices of insulin sensitivity (QUICKI) and physical fitness (PF). METHODS MPO was determined for 169 middle-aged men divided into two groups according to waist circumference (WC- < 94 cm, WC+ ≥ 94 cm) each subdivided in two subgroups wi...

BACKGROUND Body mass index (BMI) and waist circumference (WC) are the most used anthropometric measures to identify obesity. While BMI is considered to be a simple and accurate estimate of general adiposity, WC is an alternative surrogate measure of visceral obesity. However, WC is subject to significant inter-examiner variation. The aim of the present study was to correlate BMI and WC measures...

We conducted observations and analyses of the molecular cloud, N4, which is located at ~40 pc from SS433 same line sight as that radio shell, in 12CO(J=1-0), 12CO(J=3-2), 13CO(J=3-2), grand-state OH emissions.N4 has a strong gradient integrated intensity 12CO(J=1-0, 3-2) emission northern, eastern western edges. The main body N4 also velocity ~0.16 km s^-1 20"^-1. A shift by up to 3 systemic ~4...

Aims. We investigate the structure of a field around the position of V838 Mon as seen in the lowest CO rotational transitions. We also measure and analyse emission in the same lines at the position of V838 Mon. Methods. Observations have primarily been done in the 12CO J = 2→1 and J = 3→2 lines using the KOSMA telescope. A field of 3.4 squared degrees has been mapped in the on-the-fly mode in t...