Paléoanthropologie et préhistoire, 1983-2005

Time trends in sleep-onset difficulties among Norwegian adolescents: 1983--2005.

AIMS To investigate trend data in the prevalence of sleep-onset difficulties among Norwegian adolescents covering the age groups 11, 13 and 15 years. METHODS Data were based on the Health Behaviour in School-aged Children - A WHO Cross-National Survey (HBSC) - and were collected on six occasions between 1983 and 2005. At each point in time data were obtained from representative samples compri...

Response to Comments on Brandão et al. (2005)

Dev122325 1978..1983

During plant epidermal development, many cell types are generated fromprotodermal cells, a process requiringcomplex co-ordinationof cell division, growth, endoreduplication and the acquisition of differentiated cellular morphologies. Herewe show that theArabidopsis phytocalpain DEFECTIVE KERNEL 1 (DEK1) promotes the differentiated epidermal state. Plants with reduced DEK1 activity produce cotyl...

E.B. Wilson medalists, 1983

It is often said that a scientist is lucky to make one great discovery in a career; those rare individuals who make more than one are very special indeed. Joseph Gall has made not one but several major discoveries which have both theoretical and practical consequences. His early research on lampbrush chromosomes of amphibians established many facts about chromosome structure. For example, he di...

C3ee40831k 1983..2002

Photoelectrochemical water splitting is a promising route for the renewable production of hydrogen fuel. This work presents the results of a technical and economic feasibility analysis conducted for four hypothetical, centralized, large-scale hydrogen production plants based on this technology. The four reactor types considered were a single bed particle suspension system, a dual bed particle s...