background vascular ring is less than 1% of congenital heart disease. double aortic arch (daa) is the most common form of it.  its detecting is important because of the effects of pressure on the esophagus and trachea. case report in this study, three children suffering from double aortic arch with symptoms of dysphagia and recurrent aspiration, which in two cases had led to cardiac arrest, wer...

triptoreline is a potent agonist of luteinizing hormone-releasing hormone, currently used in the treatment of prostatic cancer where therapy may be required over months or years. frequent injection of drug decreases patients’ compliance. the present study describes the formulation of a sustained release microparticulate drug delivery system containing triptoreline acetate, using poly (d,l lacti...

fusion is a rare occurrence in molar teeth. the purpose of this rare case presentation is to describe the nonsurgical endodontic treatment of maxillary molar. a 28-year-old patient was referred for endodontic treatment of her chronic apical abscess of right maxillary second molar. in the clinical examination, a sinus tract adjacent to involved tooth and a small crown of supernumerary tooth fuse...

background: patients which have diagnosed with a cancer, have a life time risk for developing another de novo malignancy depending on various inherited, environmental and iatrogenic risk factors. cancer victims could survive longer due to settling treatment modalities, and then would likely develop a new metachronous malignancy. this article aims to report our observed trend of increasing, in p...

the goal for this research is to study the relationship between locus of control and achievement motivation with test anxiety among the master students of the azad university, olum tahghighat unit in 2010-2011. considering the morgan table the number of sample individuals for this research was 370. also cluster double sampling method was used. for collection of data three questions and theories...

despite controversy, the contingent valuation method (cvm) is widely used for non-market valuation. among elicitation methods of cvm, the dichotomous choice (dc) has been paid attention. there are two types of dc methods: single-bounded dc (sbdc) and double-bounded dc (dbdc). dbdc is more efficient than sbdc. many of cvm studies in iran used dbdc but data analyses were done by logit model; that...

A 67-year-old female chronic smoker was evaluated for an asymptomatic right paratracheal mass and the diagnosis of double-arch aorta was made. She returned 2 years later with dyspnoea on exertion, productive cough and wheeze on lying supine. Flow volume curve showed variable intrathoracic airway obstruction, and bronchoscopy revealed extrinsic compression of the trachea by double-arch aorta wit...

A small number of LINERs have been seen to display variable Hα emission with a very broad, double-peaked profile. Recent observations with the Hubble Space Telescope indicate that such emission may be a common attribute of LINERs. The double-peaked or doubleshouldered line profiles resemble those found in a subset of broad-line radio galaxies. Several lines of argument suggest that such feature...

β Cen is a bright β Cephei variable and has long been suspected to be a binary. Here we report interferometric observations with the 3.9-m Anglo-Australian Telescope at a single epoch which show the star to be a binary with components separated by 15 milliarcsec and having approximately equal luminosities at 486 nm. We also present high-resolution spectra taken over five nights with the ESO CAT...

Based on a field theoretically inspired model of light-cone wave functions, we derive valence-like generalized parton distributions and their double distributions from the wave function overlap in the parton number conserved s-channel. The parton number changing contributions in the tchannel are restored from duality. In our construction constraints of positivity and polynomiality are simultane...