Applying the key principles of nutrition to nursing practice

This article outlines the importance of good nutrition in adults and children. With reference to adult nursing, the article highlights the benefits of nutritional screening of patients, identifies alternative foods for undernourished patients, and discusses why feeding and planning meal times are vital aspects of patient care. In terms of paediatric nursing, the article discusses the implications of childhood obesity and the importance of eating the right balance of foods

Measuring temperature

Temperature measurement is an essential clinical skill and is recognised as being an important indicator in assessing the course of an illness. This article identifies temperature ranges and describes the procedures for taking temperature orally and via the tympanic canal in adult and paediatric patients

Origin of the Eocene planktonic foraminifer Hantkenina

Hantkenina is a distinctive planktonic foraminiferal genus characterized by the presence of tubulospines (robust hollow projections) on each adult chamber, from Middle and Upper Eocene marine sediments worldwide. Here we illustrate its evolutionary origin using c. 150 specimens from 30 stratigraphic intervals in two sediment cores from Tanzania. The specimens, which span an estimated time interval of 300 ka, show four intermediate steps in the evolution of the tubulospines that amount to a complete intergradation from Clavigerinella caucasica, which does not possess them, to Hantkenina mexicana, which does. Stable isotope analyses indicate that the transitional forms evolved in a deep planktonic habitat not occupied at that time by other species of planktonic foraminifera. We discuss the morphogenetic constraints involved in the evolutionary transition and propose an ecological/adaptive model for the selective pressures that resulted in the evolution of tubulospines. We compare our record with similar, recently described assemblages from Austria and Italy, and we update the biostratigraphy and systematic taxonomy of the key morphospecies involved in the transition