Many species of Drosophila have courtship displays in which the male vibrates one or both wings after approaching the female. In Drosophila melanogaster the major part of this display occurs with the wing nearer the female extended to nearly 90 from the long axis, in which position the wing is vibrated (Spieth, 1952). It has been shown that this vibration is accompanied by a train of sound puls...

Samples of cell suspension represents seven different densities were exposed to three electrotreatment 40, 50, 60 volt and for a period time 100 msec then the mixed with concentration Ri plasmid 25, 75 Microliter. The samples cultured by embedding in agar drops solid-liquid cultures. Results proved that enhanced division caused clear increase microcolonies, total number colonies reached 3276 wh...

Sinus node (SN) function was analyzed with and without autonomic blockade in 20 normal subjects, ages 15-67 years (mean 44 i 16 years). Various electrophysiologic measures of SN functionSN cycle length (SNCL), SN recovery time (SNRT), corrected SNRT (CSNRT) and sinoatrial conduction time (SACT) were analyzed. CSNRT was measured after atriil pacing at multiple rates. SACT was analyzed using two ...

Electrophysiological studies were performed in 22 patients with intraventricular conduction delay before and after intravenous infusion of disopyramide (Norpace), 2 mg/kg. Mean control maximal sinus node recovery time (1039 +/- 187 msec), atrioventricular nodal conduction time (113 +/- 28 msec), and atrioventricular nodal effective refractory periods (349 +/- 67 msec) did not change significant...

Triton-fractionated photosystem-I particles poised at -625 mV, where the two bound iron-sulfur proteins are reduced, have been studied by optical and electron paramagnetic resonance spectroscopies from 293 to 5 K. At 5-9 K, these particles exhibit two decay components with lifetimes of 1.3 and 130 msec in the laser pulse-induced absorption and electron paramagnetic resonance signal changes. Spe...

This paper proposes a new bilateral control scheme to ensure both transparency and robust stability under unknown constant time delay in stiff environment. Furthermore, this method guaranties suitable performance and robust stability when transition occurs between soft and stiff environments. This framework is composed of an adaptive sliding mode controller and an adaptive impedance controller,...

The effect of two consecutive ventricular premature stimuli (S1S2) during atrial pacing on dispersion of repolarization and inducibility of ventricular arrhythmias was studied in 16 dogs under control conditions and in four dogs in the presence of an increased dispersion of repolarization during atrial pacing induced by general hypothermia and regional warm blood perfusion via selective cannula...

constructionof underground dams is a practical solution to save groundwater in alluvium watersheds, particularly in arid and semi-arid regions where surface water scarcity is an environmental challenge. considering socio-economic and environmental benefits of underground dams, the accurate locating is the primary consideration for dam construction. the new technologies and methods are a step to...

Several tachistoscopic visual half-field experiments using exposure times in excess of 150 msec have been reported and arguments have been put forth justifying this procedure. An experiment was done investigating visual field accuracy under conditions where eye movement was allowed, following parafoveal exposure. Two control experiments were done to evaluate the viewing conditions. When eye mov...