Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 831 - Aufforderung zur Rückkehr nach Berlin

u.a. Auswirkungen der Cholera; Steuer; Liebesbeziehung;

Manuel Rojas L., Ing. Agr.- Viticultura y vinificación. 831 pp., 1950. Editorial Nascimento, Santiago, Chile.

Fil: Vega, J.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias

The measurement of broadband ultrasonic attenuation in cancellous bone-a review of the science and technology

The measurement of broadband ultrasonic attenuation (BUA) in cancellous bone at the calcaneus was first described in 1984. The assessment of osteoporosis by BUA has recently been recognized by Universities UK, within its EurekaUK book, as being one of the “100 discoveries and developments in UK Universities that have changed the world” over the past 50 years, covering the whole academic spectrum from the arts and humanities to science and technology. Indeed, BUA technique has been clinically validated and is utilized worldwide, with at least seven commercial systems providing calcaneal BUA measurement. However, a fundamental understanding of the dependence of BUA upon the material and structural properties of cancellous bone is still lacking. This review aims to provide a science- and technology-orientated perspective on the application of BUA to the medical disease of osteoporosis.

Porphyrins with metal, metalloid or phosphorus atoms directly bonded to the carbon periphery

Organometallic porphyrins with a metal, metalloid or phosphorus fragment directly attached to their carbon framework emerged for the first time in 1976, and these macrocycles have been intensively investigated in the past decade. The present review summarises for the first time all reported examples as well as applications of these systems.