Gentse memoriedagen: 15-16-17-18-19 augustus.

anti-2,2,3,3,6,6,7,7,10,10,11,11,14,14,15,15-Hexadeca­methyl-2,3,6,7,10,11,14,15-octa­silapenta­cyclo­[10.4.2.24,9.05,8.013,16]icosa-1(17),4,8,12(18),13(16),19-hexa­ene

The title compound, C28H52Si8, was synthesized by condensation of two mol-ecules of 1,2,3,4-tetra-kis-(chloro-dimethyl-sil-yl)benzene with lithium. The 3,4-disila-1,2-benzocyclo-butene rings in the centrosymmetric molecule are bridged by 1,1,2,2-tetra-methyl-disilanylene chains with an anti conformation. The benzene rings are deformed by fusion with a 3,4-disilacyclo-butene ring resulting in a ...

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Winter : synergistic effect of cells from the adult heart

Packing 16, 17 or 18 circles in an equilateral triangle

We present new, efficient packings for 16, 17 and 18 congruent circles in an equilateral triangle. The results have been found by the use of simulated annealing and a quasi-Newton optimization technique, supplemented with some human intelligence.

Does Parental Divorce Increase Risk Behaviors among 15/16 and 18/19 year-old Adolescents? A Study from Oslo, Norway

BACKGROUND Several studies have reported an increase in risk behaviors among adolescents after experience of parental divorce. The aim of the study was to investigate whether parental divorce is associated with risk behavior among adolescents independent of mental health problems, first when early divorce was experienced, and second after experience of late parental divorce. METHOD One prospe...

Availability of 15 N from pioneer herbaceous plants to pine seedlings in 17 reclaimed burnt soils 18 19

A pot experiment was used to assess the N uptake by pine seedlings 24 during two years on a burnt soil added with 15 N-labelled ryegrass, obtained from 25 a 15 N-enriched sample of this soil after the fire. Nitrogen concentration in needles, 26 stems and roots of seedlings decreased significantly from the first to the second 27 1.12% of the added ryegrass-15 N was recovered: two thirds in the s...