Anionic and Magnetic Ordering in Rare Earth Tantalum Oxynitrides with an = 1 Ruddlesden-Popper Structure.

The new compounds RTaON with R = La, Ce, Nd, and Eu and 1.20 ≤ ≤ 2.81 have been obtained by a solid-state reaction between metal nitrides and oxides or oxynitrides under N gas at temperatures between 1200 and 1700 °C.

[Taking the responsibility of a 'knowledge' one only has access during mental health consultations: stakes of an ethical issue].

Everyone has a certain knowledge of what psychologically constitutes him/her. Part of the therapist's ethical approach is to help this knowledge come to conscience. Apart from the analytical process, within one or a few therapeutic sessions, is the person consulting able to have access to a minimal knowledge about him-herself? Using this knowledge to guide certain aspects of his-her life, calls upon an ethics of responsibility on the part of the person consulting.

[Ventricular tachycardia during theophylline overdose. Apropos of a case of reduction by magnesium chloride].

The authors report a case of ventricular tachycardia (VT) induced by theophylline toxicity in a patient with ischaemic heart disease complicated by left ventricular failure and chronic asthma. Two episodes of VT were reduced by intravenous injection of magnesium chloride. The aggravating role of a moderate magnesium deficiency is suggested by the synergy of hypomagnesemia and theophylline on intracellular calcium fluxes contributing to an accumulation of intracytoplasmic calcium, a situation which has been shown experimentally to generate delayed after depolarisations.

[Pharmacokinetics of oral propafenone in patients with supraventricular arrhythmia].

The efficacy of propafenone (P), a class IC antiarrhythmic drug with weak beta-blocking properties was studied over a four day period in 10 patients with supraventricular arrhythmias (atrial fibrillation 7, flutter 1 and tachycardia 2). Group 1 included five patients (3M, 2F) who received 300 mg of P on days 1 and 4. Group 2 included five patients (4M, 1F) who received 600 mg on days 1 and 4.

[Numerical angiography in the evaluation of arterial hypertension].

Intravenous numeric angiography is a new method of medical imaging for investigation of possible renovascular causes of arterial hypertension. A non-invasive examination, it is less costly than conventional renal arteriography and can be performed in outpatients. Satisfactory images of the renal arteries were obtained in 80 p.