The DNA Landscape: Development and Application of a New Framework for Visual Communication about DNA.

Learning molecular biology involves using visual representations to communicate ideas about largely unobservable biological processes and molecules. Genes and gene expression cannot be directly visualized, but students are expected to learn and understand these and related concepts. Theoretically, textbook illustrations should help learners master such concepts, but how are genes and other DNA-linked concepts illustrated for learners? We examined all DNA-related images found in 12 undergraduate biology textbooks to better understand what biology students encounter when learning concepts related to DNA.

Current evidence regarding models of acute care for hospitalized geriatric patients.

This article examines the current evidence on models of acute care for hospitalized older people. The 3 models examined were Acute Care for Elders (ACE), Hospitalized Elder Life Program (HELP), and Nurses Improving Care for Health-System Elders (NICHE). Thirteen research reports examining these models of care were assembled from online search engines and used for this integrative literature review.

Transport, deposition and biodegradation of particle bound polycyclic aromatic hydrocarbons in a tidal basin of an industrial watershed.

Polycylic aromatic hydrocarbons (PAHs) are common contaminants in industrial watersheds. Their origin, transport and fate are important to scientists, environmental managers and citizens. The Philadelphia Naval Reserve Basin (RB) is a small semi-enclosed embayment near the confluence of the Schuylkill and Delaware Rivers in Pennsylvania (USA).