Abstract : Sérologie results of the 1969 mission in Ammassalik. The aim of this mission was to study individuals not having been tested before by any previous french or danish expedition (Gessain ...1935, Skeller 1950, Tingsgaard 1962). Before the departure of the mission for Ammassalik in 1969 a list of these individuals, never serologica'lly determined, has been established by the C.R.A. ; blood samples have been obtained from 130 individuals. This sample was only made to complete previous work; it is too small to allow any estimation of gene frequencies or any other form of statistic or genetic analysis. Results are given in the rough — phenotypes counting — especially because the necessity of completing an already very important sample made us collect an heterogeneous group of individuals some of which were relatives and the others were not. Definitely we must not look for another explanation to such facts as the high frequency of phenotype AB in our results. Results. Table I gives results concerning red cells typing. We must add that the 130 individuals were all Rhesus positive, Kell negative, vw negative and i positive ; no red cells antigènes have been found in the Lewis system. Table II gives results concerning Gm and Inv. systems. The GmB factor corresponds to Gm 25 (described by Blanc et al.) of the international nomenclature. Table III gives results concerning haptoglobins. Hematimetric and cytoche- mical studies have been made on some samples. Hemoglobins have been found all normal. No case of treponematosis has been found (test of Kline and B.W. Kolmer, all negative).
Fernet P., Langaney A., Robbe Pierre. Résultats sérologiques de la mission de 1969 à Ammassalik. In: Cahiers du Centre de recherches anthropologiques, XII° Série. Tome 8 fascicule 1-4, 1971. pp. 173-175.
In this work, we present the first AMBER observations, of the Wolf-Rayet and O (WR+O) star binary system y2 Velorum. The AMBER instrument was used with the telescopes UT2, UT3, and UT4 on baselines ...ranging from 46m to 85m. It delivered spectrally dispersed visibilities, as well as differential and closure phases, with a resolution R = 1500 in the spectral band 1.95-2.17 micron. We interpret these data in the context of a binary system with unresolved components, neglecting in a first approximation the wind-wind collision zone flux contribution. We show that the AMBER observables result primarily from the contribution of the individual components of the WR+O binary system. We discuss several interpretations of the residuals, and speculate on the detection of an additional continuum component, originating from the free-free emission associated with the wind-wind collision zone (WWCZ), and contributing at most to the observed K-band flux at the 5% level. The expected absolute separation and position angle at the time of observations were 5.1±0.9mas and 66±15° respectively. However, we infer a separation of 3.62+0.11-0.30 mas and a position angle of 73+9-11°. Our analysis thus implies that the binary system lies at a distance of 368+38-13 pc, in agreement with recent spectrophotometric estimates, but significantly larger than the Hipparcos value of 258+41-31 pc.
We present the first VLTI/MIDI observations of the Be star Alpha Ara, showing a nearly unresolved circumstellar disk in the N band. The interferometric measurements made use of the UT1 and UT3 ...telescopes. The projected baselines were 102 and 74 meters with position angles of 7 degres and 55 degres, respectively. These measurements put an upper limit to the envelope size in the N band under the Uniform disk approximation of \(\phi_{\rm max}= 4\pm1.5\) mas, corresponding to 14 \(R_{\star}\), assuming \(R_{\star}\)=4.8\({\rm R}_\odot\) and the Hipparcos distance of 74pc. On the other hand the disk density must be large enough to produce the observed strong Balmer line emission. In order to estimate the possible circumstellar and stellar parameters we have used the SIMECA code developed by Stee (1995) and Stee & Bittar (2001). Optical spectra taken with the echelle instrument Heros and the ESO-50cm telescope, as well as infrared ones from the 1.6m Brazilian telescope have been used together with the MIDI spectra and visibilities. These observations put complementary constraints on the density and geometry of Alpha Ara circumstellar disk. We discuss on the potential truncation of the disk by a companion and we present spectroscopic indications of a periodic perturbation of some Balmer lines.
Five techniques for preparing river sediments and sewage sludges for atomic absorption spectrometry determination of Cd, Pb, Ni, Cu, Zn and Cr are evaluated. The results obtained with four samples by ...fourteen laboratories are compared statistically. The method involving dry ashing at 55O°C then leaching with a mixture of hydrochloric and hydrofluoric acids was found to be the best technique.
The influence of some sieving parameters (nature and pH of water, volume and pH of sample, duration of test, nature and size of sieve mesches) on the metallic content of sieved sediments was ...investigated. The results show that after sieving on a stainless steel sieve, it is not possible to analyse for the elements constitutive of the welds (Sn, Zn, Cd and especially Pb) whereas nylon sieves produce only a contamination by Zn. It is thus desirable to use nylon sieves when metal analyses are to be carried out on sieved sediments.
