Morphological observations on Absidia corymbifera and Absidia blakesleeana strains preserved under mineral oil
Macro‐ and micromorphology of 30 living subcultures of Absidia corymbifera (10 strains plus three strains of Absidia ramosa) and Absidia blakesleeana (two strains) preserved under mineral oil at room temperature for periods ranging from 3 to 44 years in The Fungal Culture Collection of Instituto Oswaldo Cruz (IOC) were observed and described by permanent mycological preparations mounted in a glycerol 10% and/or Amann lactophenol solution. Vegetative and asexual reproductive structures are illustrated by drawings made with the aid of a camera‐lucida. The study showed that the period of maintenance under mineral oil and the stress which took place during the period of storage did not affect the vegetative and asexual reproductive morphology of the Absidia strains and species studied here.
Species of Absidia with ovoid sporangiospores. II.
The only species of the genus Absidia found in animals and man belong to A. ramosa and A. corymbifera. We have studied more than 150 isolates belonging to these two species. Although closely related, the two are distinguishable by the regularly elliptical to ovoid spores of A. namosa and the irregularly ovoid to globose spores of A. corymbifera. A large number of synonyms exist for both species. Zygospores are illustrated for the first time for both heterothallic species and are produced when appropriate strains are mated on media, such as yeast extract agar, at an optimum temperature of 31° C. Zygospores are formed in a diffuse fashion throughout the aerial mycelium when two appropriate colonies meet and are produced between two nearly parallel suspensors devoid of outgrowths. The zygospores are globose to slightly compressed and encircled by one or more ridges with the equatorial one most conspicuous. Absidia orgyptiacum, A. capillata, A. dubia, A. robusta, A. tuneta, Lichtheimia sartoryi, Mycocladus hy...
Nursing theory and administrative practice: Agenda for the 1990s
&NA; Despite past progress in the development of nursing theory, a theoretical nursing perspective is not yet common to the practice of nursing administration. Such a perspective could serve as a catalyst both to advance knowledge development for administrative nursing practice and to align clinical and administrative practice within a common framework. In this article assumptions, concepts, and questions common to both clinical and administrative nursing practice are identified. Select domain concepts are used to exemplify the themes shared by nurse clinicians and nurse administrators. The article concludes with a five‐item agenda as a guide for future theory development.