Variation of specific morphological traits and ploidy level of five "aegilops" l. species in Morocco

Variation of specific morphological traits and ploidy level of five Aegilops L. species in Morocco.The genus Aegilops L. represents an important natural source of useful genes for wheat breeding, with particular emphasis on biotic and abiotic stress resistance. For successful crosses, the primarily step is to select appropriate Aegilops accessions. In this paper, we studied five Moroccan species of an Aegilops collection on the basis of spike structure and chromosome number. Twenty-eight specific morphological characters were used to differentiate the species. Statistical analyses, in particular the DFA, allowed the characterization of the genetic variability of the species; the two first standardized axes explained 96,2% of the total variability and 100% of the entities were classified within their own group. In addition, the dendrogram constructed using morphological data reveals a significant variability within and between species. Cytogenetic study revealed four species, A. geniculata Roth, A. triuncialis L., A. ventricosa Tausch and A. peregrina Maire & Weiller, to be tetraploid. However, A. neglecta Req. ex. Bertol., where only two accessions are represented in the collection, revealed to be hexaploid, and can then be classified as A. neglecta subsp. recta Chennav

A macroeconomic model for a developing country : estimation and simulation of a macroeconometric model for Iran (1959-1993).

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN007256 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Thermal analysis and bearing capacity of piles embedded in frozen uniform soils

The objective of this research is the analysis of propagation of the thawing front in frozen soils induced by the periodical change of temperature acting on the top boundaries. This problem appears to be important in determination of the maximum depth of thawing zone arising around the piles. The negligence of the thawing depth in analysis of deep foundations embedded in frozen soils leads to excessive settlements and finally can result in very costly repairs of the structures. Consequently, this problem is very important in calculations of the bearing capacity of the piles supporting various structures (e.g. bridge structures). The formulation of the heat transfer problem including phase change for fixed domain is based on the law of conservation of energy. This law determines the weak form of the problem including all possible thermal boundary conditions. After the determination of the maximum depth of thaw defining the active layer, uplift or heaving forces that result from adfreezing on deep foundation in frozen soil are investigated. Laboratory experiments are conducted to estimate the adfreeze bond strength at the side of a pile in contact with a soil sample. (Abstract shortened by UMI.)Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1994 .A85. Source: Masters Abstracts International, Volume: 34-02, page: 0815. Adviser: Barbara Budkowska. Thesis (M.A.Sc.)--University of Windsor (Canada), 1994

Structural, Electronic, and Vibrational Properties of Amino-adamantane and Rimantadine Isomers

We performed a first principles total energy investigation on the structural, electronic, and vibrational properties of adamantane molecules, functionalized with amine and ethanamine groups. We computed the vibrational signatures of amantadine and rimantadine isomers with the functional groups bonded to different carbon sites. By comparing our results with recent infrared and Raman spectroscopic data, we discuss the possible presence of different isomers in experimental samples