It has been shown that 3-methyl-10-formylpyrene is also present in the reaction mixture. Reduction (Huang-Minlon) of the formyl derivatives affords 3,5-dimethylpyrene (m.p.: 98-99°) and 3,10-dimethylpyrene (m.p.: 129-130°) respectively. Treatment of 3,8-dibromopyrene with butyl-...
Material and methods: The genes encoding some of the AMEs were investigated among 305 aminoglycoside-resistant strains of Enterococcus spp isolated in hospitals of the VIII region of Chile, by dot blot hybridization and Polymerase Chain Reaction (PCS). Results: High level resistance to some ...
sarcelle d'etecontenu stomacalA General Synthesis for Mono- C -Functionalized Tetrazamacrocycles A new synthesis, under usual conditions of concentration, medium, and temperature, of a series of mono- C -functionalized tetraazamacrocycles is given. The method may easily be generalized. The new ...
Colonic DiseasesFirst page of articleHorstmann, C. A. L.Delft, Laboratoire de chimie de l‘Ecole technique supérieureScheffer, F. E. C.Delft, Laboratoire de chimie de l‘Ecole technique supérieureJohn Wiley & Sons, Ltd.Recueil des Travaux Chimiques des Pays-Bas...
The development of the laticifers of the primary system in the roots of young seedlings ofHeveais investigated. The nucleus of the maturing secretory cells progressively diminishes in size, thus giving rise to a dense "pycnotic" body. Plastids of primary laticifers show an organization ...
Multiple evanescent-white-dot-SyndromHLA-B51doi:10.1055/s-2008-1035221J. RichartzR. NeigerGeorg Thieme Verlag KGKlin Monatsbl Augenheilkd
MonitoringCardiotocographyWe present a case of an emergency Caesarean section due to misinterpretation of the cardiotocography (CTG) trace during general anaesthesia for treatment of dental abscess. Following failure of the dental abscess treatment under local anaesthesia, a 29-year-old female in the...
This fraction was tested on associations of testes and ovaries maintained in organ culture and was shown to have an action comparable to that of cerebroid ganglia in that it stimulates the secretion of testicular androgen. This preliminary result suggests that development of the clitellum, ...
The light intensity of a Hg vapour lamp transmitted by a filter has been measured with a potassium ferrioxalate actinometer. The spectral intensity distribution of the light was measured and corrections were applied for intensity loss and multiple reflexions. The quantum yield is given by Φ = I...
The crystal structure was solved in the case of (UO) 2 ErS 3 : tetragonal cell, space group 14/m mm, a = 3.785, c = 20.83 , Z = 2. A sheet structure is formed by alternating (UO) and (ErS 3 ) sheets. The apparent oxydation state of U is 3.5, and there is only one serie...