Measurement of the ^{13}C(α, n_{0})^{16}O Differential Cross Section from 0.8 to 6.5 MeV

The cross section of the ^{13}C(α,n)^{16}O reaction is needed for nuclear astrophysics and applications to a precision of 10% or better, yet inconsistencies among 50 years of experimental studies currently lead to an uncertainty of ≈15%. Using a state-of-the-art neutron detection array, we have performed a high resolution differential cross section study covering a broad energy range. These measurements result in a dramatic improvement in the extrapolation of the cross section to stellar energies potentially reducing the uncertainty to ≈5% and resolving long standing discrepancies in higher energy data.

Serum amyloid A gene expression in rabbit, mink and mouse

The expression of serum amyloid A (SAA) protein, a major acute-phase reactant in most species, was examined by in situ hybridization in multiple organs of rabbit, mink and mouse. In livers of unstimulated mice and rabbits a heterogeneous pattern of SAA expression in hepatocytes was observed. In all three species, lipopolysaccharide (LPS) administration resulted in extensive uniform hybridization of SAA probes to hepatocytes and in the rabbit SAA transcripts were detected in cells in the white pulp of the spleen, the adrenal cortex and ovary as well as in the mucosa and lymphatic vessels of the small intestine. Examination of hybridizing SAA signals in the rabbit myocardium showed a speckled distribution in myocytes. The rabbit endocardium was strongly positive, and in the kidney rabbit SAA mRNA was mainly confined to epithelial cells of the proximal and distal convoluted tubules. In the unstimulated mouse, SAA mRNA was detected in the liver and epithelial cells of the small and large intestine. After stimulation of an acute-phase response with LPS a strong response was seen in these organs as well as in the convoluted tubules of the kidney. In extrahepatic organs of the mink, no SAA mRNA was detectable in unstimulated animals, while the convoluted tubules of the kidney and uterine endometrium were strongly positive after systemic LPS injection.

Planning a continuum of care in child psychiatric nursing. A collaborative effort

A guide for providing a continuum of care for children in need of psychiatric services from the least restrictive services (outpatient care), to a moderately restrictive setting (partial hospitalization), to the most restrictive setting (inpatient care) is described. Movement along the continuum is facilitated by the nurse case manager. Concepts from three theoretical frameworks are integrated to define goals, criteria, and expected outcomes for each level of care along the continuum. They are Neuman's (1982) systems model for nursing practice and education, Caplan's (1961) model for primary prevention of mental disorders in children, and Frances, Clarken and Perry's (1984) differential therapeutics. The continuum provides a guide for nurses and other health care providers to achieve high quality care as economically as possible. It also enhances self-care and self-responsibility for families of disturbed children by offering a sequential graded system of care along the health-illness continuum.