Karyotypic analysis of two durum wheat varieties

The karyotypes of 'Capeiti' and 'Mexicali', two durum wheat (Triticum turgidum L. var. durum) cultivars were constructed on the basis of the Giemsa banding of their chromosomes. No major differences were noted. Minor differences were as follows: chromosome 4B of 'Mexicali' has more heterochromatin than its counterpart in 'Capeiti', and chromosome 5B in 'Capeiti' has a terminal band on its long arm that is lacking in 'Mexicali', while the opposite is true for the long arm of 6B. In 'Mexicali' 6BS there is a wider band next to the secondary constriction than in 'Capeiti'.Key words: durum wheat, karyotype, C-banding, heterochromatin.

Some Useful Design Parameters of Non-Uniform Integrated Band-Pass Filters

Important design parameters for a two-port three-terminal band-pass filter configuration of the integrated thin-film exponential distributed parameter R–C–KR microstructure are presented. The circuit exhibits load independent characteristics. The changes in the value of design parameters under varying loading conditions are given. Various plots illustrating the inter-relationship of the different parameters with each other that can serve as guidelines for a system designer to obtain a pre-assigned pattern of the performance characteristics of the microstructure are included.