We demonstrate a source of correlated photon pairs which will have applications in future integrated quantum photonic circuits. The source utilizes spontaneous four-wave mixing (SFWM) in a dispersion-engineered nanowaveguide made of AlGaAs, which has merits of negligible two-photon absorption and low spontaneous Raman scattering (SpRS). We observe a coincidence-to-accidental (CAR) ratio up to 1...

the effects of hydroalcoholic extract of peganum harmala seeds (eps) on spontaneous rhythmic contractions of isolated rat uterine was investigated in this study. eps was tested on the isolated uterus and endometrium free (i.e. stripped myometrium) preparations. eps was found to exhibit significant spontaneous contractions of the uterus and stripped myometrium relative to the solvent control. af...

Major proportion of intracellular calcium (Ca 2+ ) is achieved through opening of calcium channels present in the plasma membrane which play an important role in regulating neuromuscular coordination and release of neurotransmitters from nerve terminals. Blockade of these calcium channels adversely affect contractile process and release of neurotransmitters in majority of the neuromuscular prep...

Spontaneous coal combustion (SCC) is one of the significant hazardous phenomena in underground coal mines. The tendency of spontaneous coal combustion is an intrinsic property, due to the presence of the maceral content. Unlike its importance, this matter has not been discussed in detail among the researchers. Therefore, it is necessary to investigate the effect of this parameter on SCC. Macera...

Spontaneous histamine release from isolarted Mastcells was found to be independent of cal­cium in the concentration range up to 1 m. mole/lit. Phosphatidyl serine do not change the effect of calcium on spontaneous release. The activation of anaphyla.ctic histamine release by calcium is potentiated by phosphatidyl serine but the laitter can't do so w1th strontium.  Mastcells, pretreated with AT...

Background: Traumatic pseudoaneurysm of the supratrochlear artery is a rare lesion. It manifests, as a painless mass, in the frontal region following trauma. The unusual incidence and confusing presentation require the clinicians to thoroughly understand its presentation and diagnosis. Diagnosis is typically made on history and physical examination, but it can be confirmed by duplex ultraso...

The Status of Spontaneous Order in von Hayek’s Theory of Freedom and Its Educational Implications M. Moosivand Y. Ghaa’edi, Ph.D. S. Zarghaami, Ph.D. A. R. Mahmoodniyaa, Ph.D. The history of human thought shows that the concept of freedom and its use in different frameworks has been a major topic of discussion in philosophy. Within the educational system, freedom ...

Introduction: Considering the antiepileptogenic effects of repeated transcranial magnetic stimulation (rTMS), the effect of rTMS applied during amygdala kindling on spontaneous activity of hippocampal CA1 pyramidal neurons was investigated. Materials and Methods: A tripolar electrode was inserted in basolateral amygdala of Male Wistar rats. After a recovery period, animals received daily kindl...