the aim of the present study was to investigate the effect of gender on the distribution of pancreatic islets in native chicken. ten adult male and ten adult female isfahan native chickens were used in this experiment. results showed a distinct sexual dimorphism in the native chicken pancreas which depends upon the various fractions of the pancreatic lobes, which were occupied by alpha, beta an...

Different recombinant N-lobes of chicken ovotransferrin (oTF/2N) have been isolated from the tissue-culture medium of baby hamster kidney cells transfected with the plasmid pNUT containing the relevant DNA coding sequence. Levels of up to 40, 55 and 30 mg/1 oTF/2N were obtained for constructs defining residues 1-319, 1-332 and 1-337-(Ala)3 respectively. In addition, a full-length non-glycosylat...

The ‘circle criteria’ for giving stability information of linear systems containing one time-varying element are shown to have useful graphical interpretations for design purposes on a parameter-plane diagram. The significance of the parameter-plane approach is that, in a system design, the adjustable parameters of either the time-varying element or the time-invariant subsystem may be selected ...

We introduce a model combining Kerr nonlinearity with a periodically changing sign (“nonlinearity management”) and a Bragg grating (BG). The main result, obtained by means of systematic simulations, is presented in the form of a soliton’s stability diagram on the parameter plane of the model; the diagram turns out to be a universal one, as it practically does not depend on the soliton’s power. ...

We continue the study of the structural stability and the bifurcations of planar bimodal linear dynamical systems (BLDS) (that is, systems consisting of two linear dynamics acting on each side of a straight line, assuming continuity along the separating line). Here, we enlarge the study of the bifurcation diagram of saddle/spiral BLDS to saddle/source BLDS and in particular we study the positio...

Stability analysis in compliant mechanism (CM) design is of utmost importance. From a practical point of view, a CM that is unstable is of no significance (has no practical value). Three useful plots were considered in the evaluation of each of the dynamic models of nine configurations of compliant constant-force compression mechanisms (CCFCMs) for their stability characteristics, which include...

The complexity of phase stability and transformations in plutonium alloys is reflected in the plutoniumgallium (Pu-Ga) phase diagram, which is perhaps the most complex of all binary systems. Although many investigations have explored phase equilibria, transformation systematics, and structure/property relations in the Pu-Ga system, many outstanding problems remain and new issues regularly appea...

Nozzle serrations or chevrons are being deployed for reducing the noise from jet engines. The turbulent mean flow field of such jets takes on a serrated character, and the linear stability eigenspectrum for such serrated mean flows determines the evolution of the coherent wavepackets that are linked to the aft angle noise radiated. In particular, the lower the growth rate and phase speed of the...