Acta Amazonica 1970 - 1974
نویسندگان
چکیده
منابع مشابه
Alkaloids from Eucharis amazonica (Amaryllidaceae).
Thirteen alkaloids have been isolated from dried bulbs and leaves of flowering Eucharis amazonica (Amaryllidaceae). The alkaloids, 7-methoxyoxoassoanine, 6-O-methylpretazettine and apohaemanthamine, are reported for the first time from a natural source.
متن کاملChanging incidence and survival for heart failure in a well-defined older population, 1970-1974 and 1990-1994.
BACKGROUND An epidemic increase in heart failure (HF) mortality, hospitalization, and prevalence rates has been observed among older persons in recent years. It is unclear whether this reflects an increase in incidence or survival. METHODS AND RESULTS We conducted a retrospective cohort study comparing HF in 1970 to 1974 and 1990 to 1994 among persons > or =65 years old belonging to a large, ...
متن کاملActa updates
Open Access, no copyright Since 2005, Acta Orthopaedica has been a platinum Open Access journal. This means that all articles from 1930 until now are immediately free for everyone to read and download. Acta has no copyright on articles, which are all published under a Creative Commons Licence that permits all non-commercial use of them. Platinum Open Access means that the authors pay nothing fo...
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متن کاملActa Polytechnica
We consider the linear and nonlinear Schrödinger equation for a Bose-Einstein condensate in a harmonic trap with PT -symmetric double-delta function loss and gain terms. We verify that the conditions for the applicability of a recent proposition by Mityagin and Siegl on singular perturbations of harmonic oscillator type self-adjoint operators are fulfilled. In both the linear and nonlinear case...
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ژورنال
عنوان ژورنال: Acta Amazonica
سال: 1974
ISSN: 0044-5967
DOI: 10.1590/1809-43921974043004