منابع مشابه
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 ...
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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.
متن کامل17-19- Prakash I
Jaundice is one of the most common conditions which requires medical attention in neonates. In addition to the short-term side effects, phototherapy may result in DNA damage. In this study the extent of DNA damage was assessed before and after phototherapy in cases with neonatal jaundice by single cell gel electrophoresis (Comet Assay). Eighty babies with neonatal jaundice were chosen for the s...
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A major controversy in memory research concerns whether recognition is subdivided into distinct cognitive mechanisms of recollection and familiarity that are supported by different neural substrates. Here we developed a new associative recognition protocol for rats that enabled us to show that recollection is reduced, whereas familiarity is increased following hippocampal damage. These results ...
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ژورنال
عنوان ژورنال: Ghendtsche Tydinghen
سال: 1970
ISSN: 1783-9033
DOI: 10.21825/gt.v32i4.6026