Showing papers by "University of Alcalá published in 1979"
TL;DR: In this paper, (C6Cl5)3Sb with halogens gives (C 6Cl5 3SbX2 (X Cl, Br) and Br2 gives an intractable residue which is rapidly hydrolysed to [(C6CL5)2As]2O.
19 citations
TL;DR: Wall formation inSaccharomyces cerevisiae seems to be the result of two main patterns of wall material deposition: around the whole periphery of the cell in nonbudding ones and mainly at the tip of the daughter cell or at the cross wall that separates dividing cells.
Abstract: Wall formation inSaccharomyces cerevisiae seems to be the result of two main patterns of wall material deposition: (i) around the whole periphery of the cell in nonbudding ones, and (ii) mainly at the tip of the daughter cell or at the cross wall that separates dividing cells. This interpretation has been obtained following experiments in which RNA or protein synthesis has been inhibited. Under these conditions, glucan formation takes place, and wall thickening is probably due to the accumulation of this polysaccharide. Furthermore, once a pattern of wall deposition has been established, it is not modified by inhibition of RNA or protein synthesis.
12 citations
TL;DR: In this paper, the authors studied the kinetics of nitrosation of Methylurea (MU) in aqueous perchloric solution using two techniques: a dynamic spectrophotometric and a stopped-flow technique.
Abstract: The kinetics of nitrosation of Methylurea (MU) in aqueous perchloric solution has been studied using two techniques: a dynamic spectrophotometric and a stopped-flow technique. The rate law obtained, whenpH was varied in the range 0.27–3.22, is
$$---d[nitrite]/dt = f[MU][nitrite][H^ + ]/(1 + g/[H^ + ])$$
where [MU] and [nitrite] represent stoichiometric concentrations. At 288.0 K and μ=1.0M,f=(15.6±0.5)M−2s−1 andg=(1.06±0.08) 10−3M. This rate law becomes independent of the acidity of the solution when this is increased ([ClO4H])>1.00M). These results together with the activation of the nitrosation rate by the ionic strength and the negative value of the activation entropy shown that only the NO2H2+ or NO+ is the effective carrier for the nitrosation. Comparisons with the nitrosation of dimethylamine were also made leading to the conclusion that there is no simple explanation for the fact that the nitrosation via NO2H2+/NO+ disappears when the nitrosable compound is of increased basicity.
7 citations
TL;DR: Developmental related changes in the extent, and pattern of ConA binding sites were observed in the neuronal perikaryon, parallel to neuronal maturation, and to the development of Golgi apparatus and endoplasmic reticulum.
7 citations
TL;DR: In this article, an approach to the concept of nonlinear realizations of group symmetries is considered, and a method to give masses to the gauge mesons without (even spontaneously) breaking the symmetry is proposed.
Abstract: An approach to the concept of nonlinear realizations of group symmetries is considered. Some physically interesting applications are suggested. In particular, a method to give masses to the gauge mesons without (even spontaneously) breaking the symmetry is proposed.
3 citations
1 citations