Atomic layer deposition (ALD) is ideal for applying precise, conformal coatings over nanoporous materials. We have recently used ALD to coat two nanoporous solids: anodic aluminum oxide (AAO) and silica aerogels. AAO possesses hexagonally ordered pores with diameters d∼10 nm and thicknesses L∼70 microns. The AAO membranes were coated by ALD with successive layers of A1203, TiO2 and V2O5 to fabricate catalytic membranes. SEM, TEM and EDAX analysis of the membranes demonstrate that the ALD layers uniformly coat the extremely high aspect ratio (L/d∼104) AAO pores. These catalytic membranes show remarkable selectivity in the oxidative dehydrogenation of cyclohexane. Additional AAO membranes coated with ALD Pd films show promise as hydrogen sensors. Silica aerogels have the lowest density and highest surface area of any solid material. Consequently, these materials serve as an excellent substrate to fabricate novel catalytic materials and gas sensors by ALD. In this study, both thin film and monolithic aerogels were coated by ZnO ALD and the properties of the aerogels were investigated as a function of the coating thickness.

White-eared Night Heron Gorsachius magnificus is probably the most threatened heron species in the world, and the highest priority for heron species conservation. From 1990 to 1998, there were sightings from only six localities in the wild. There are none in captivity. In 1998 a caged bird was found in a wildlife market in the city of Nanning, Guangxi Zhuang Autonomous Region, People's Republic of China. This finding prompted a 12-month survey in 1998–1999 of both markets and potential habitats in Guangxi. Several captured birds provided direct evidence of the existence of small populations in Guangxi and Guangdong Provinces. The respective habitats were surveyed in spring 2000, with emphasis on observations at dusk. The species was seen at two locations. Although some of the captured birds came from highly degraded habitat, the best sites seemed to be in areas near extensive primary forests, with streams, rice fields and marshes. The information obtained will be used to compile a detailed Action Plan designed to prevent the extinction of the species.

A one year follow-up is reported of a randomized clinical trial with generalized anxiety disorder (GAD) in which the main comparison was between analytic psychotherapy (AP) and cognitive therapy (CT), each delivered at weekly or fortnightly intervals over a six month period. CT was found to be significantly more effective than AP. However, GAD is a chronic and relapsing condition and follow-up data are needed to assess the durability of improvement and the possibility that the benefits of analytic psychotherapy may be more apparent over the longer term. Data were collected in three areas: (1) symptomatology and overall improvement; (2) medication usage and contact with GPs; and (3) attitudes to therapy. CT was clearly superior to AP on the main outcome measures and only a minority of AP patients made significant improvements. CT but not AP was associated with significant reductions in medication usage, and patients receiving CT were generally more positive about treatment received. Differences between treatments were less evident in the less intensive treatment condition where overall results were relatively poor. The most positive outcomes were achieved in the more intensive CT condition in which approximately two-thirds of patients achieved clinically significant improvements.