Recently, Looijen & van Andel (1999) proposed a new definition of an ecological community by using two criteria: (1) restricting membership by taxonomic relatedness, and (2) defining boundaries by the intersection of the area of population range boundaries. I analyze the implications of their definition and explore the limitations of the approach. Overall, I show this definition to be highly sc...

Two individuals showing features typical of the autosomal recessive Ellis-van Creveld syndrome have been diagnosed in a population of 1340 individuals living on a small island off the west coast of Scotland. Clinical features and family relationships of the affected individuals are described.

The presence of supernumerary teeth, also known as hyperdontia, is the condition of having teeth in addition to the regular number of teeth. The occurrence of multiple supernumerary teeth is often found in association with syndromes such as Gardner syndrome, Anderson-Fabry disease, Ellis-van Creveld syndrome, Ehlers-Danlos syndrome, incontinentia pigmenti, and Tricho-rhino-phalangeal syndrome. ...

Volume dependence of the total energy and vibrational properties of crystalline l,3,5-trinitro-l,3,5-triazine (RDX) are calculated using the density functional theory (DFT). For this molecular crystal, properties calculated with a generalized gradient approximation to the exchange-correlation energy differ drastically from experimental values. This discrepancy arises from the inadequacy in trea...

Microarray-basedanalysis ofmicrobial functional diversityalongan oil contaminationgradient in oil¢eld Yuting Liang, Guanghe Li, Joy D. Van Nostrand, Zhili He, Liyou Wu, Ye Deng, Xu Zhang & Jizhong Zhou Jiangsu Polytechnic University, Jiangsu, China; Department of Environmental Science and Engineering, Tsinghua University, Beijing, China; Department of Botany and Microbiology, Institute for Envi...

Ellis-van Creveld (EVC) syndrome is a form of skeletal and chondroectodermal dysplasia, occurring with and without systemic involvement. Taurodontism of permanent and primary molars and upper posterior supernumerary teeth are rarely associated with this syndrome. A 5-year-old girl presented with early childhood caries and hypodontia. She had labiogingival adhesion, labiogingival frenulum hypert...