amenorrhea, an absence of menses is a symptom that generally brings teenagers for evaluation. this study was undertaken to determine the etiology of primary amenorrhea with especial concern to non classic congential adrenal hyperplasia (nc-cah)-due 21 hydroxylase deficiency among female adolescents refered to clinics of pediatric endocrinology of tehran and iran university of medical sciences a...

N-doped carbon-coated ternary alloy catalysts (Pt–CoZn@NC) prepared by pyrolysis of Pt@ZIF precursors exhibit superior performances in the acid oxygen reduction reaction compared to binary (Pt–Co@NC and Pt–Zn@NC) commercial Pt/C.

Abstract Background Oral lichen planus (OLP), a common clinical oral disease, is associated with an increased risk of malignant transformation. The mechanism underlying the pathogenesis OLP unknown. dysbacteriosis reported to be one aetiological factors OLP. Although Helicobacter pylori infection various diseases, correlation between H. and unclear. This study aimed investigate effect on microb...

Objective Multiple pregnancies occur more frequently in assisted reproductive technology (ART) compared to normal conception (NC). It is known that the risk of congenital malformations in a multiple pregnancy are higher than single pregnancy. The aim of this study is to compare congenital malformations in singleton infants conceived by ART to singleton infants conceived naturally. MaterialsAndM...

The complex [(PhCH2NC)AuCl], 1, was prepared by the reaction of [(Me2S)AuCl], A, with an equimolar amount of benzyl isocyanide (PhCH2NC) ligand. Through a salt metathesis reaction, the chloride ligand in 1 was replaced by potassium benzothiazole-2-thiolate (Kbt) and potassium benzoimidazole-2-thiolate (Kbi) to a...

This paper gives the first correlation bounds under product distributions (including the uniform distribution) against the class mNC of poly(n)-size O(log n)-depth monotone circuits. Our main theorem, proved using the pathset complexity framework recently introduced in [56], shows that the average-case k-CYCLE problem (on Erdős-Rényi random graphs with an appropriate edge density) is 12 + 1 pol...