this case report describes the multidisciplinary management of subgingival horizontal crown–root fracture of an immature permanent maxillary central incisor in a 10-year-old boy. after removal of the fractured fragment, pulpotomy was performed within 48 h from the injury to promote apexogenesis. the tooth was orthodontically extruded until the fracture line was located above the alveolar bone l...

Background: Neurosurgery practice conflicts with many challenges during the COVID-19 pandemic; Including the lack of beds in intensive care units, as well as the use of some methods such as drills and trans-nasal and trans-oral approaches that produce aerosols or are directly in contact with patient discharge. Due to these challenges, developing a clinical guideline to help neurosurgeons and me...

microstructural investigation of low molecular weight 1,4-polybutadiene (1,4-pbd) was studied by 1h and 13c nuclear magnetic resonance spectroscopy (nmr). the isomer contents of 1,4-cis, 1,4-trans and 1,2- vinyl in polybutadiene microstructure were determined. the number average molecular weight for low molecular weight polybutadiene was measured by nmr techniques and comparison was made with g...

Measurement of time-of-arrival or instantaneous longitudinal position is a fundamental beam diagnostic. We present results from a stripline transversal periodic coupler structure which forms the heart of a sub-ps beam timing detector. This filter structure approximates a sinx/x response in the frequency domain which corresponds to a limited pulse length response in the time domain. These techni...

This paper is an extension of a previous work where a diagonally implicit harmonic balance method was developed and applied to simulate oscillatory motions of pitching airfoil and wing. A more detailed study on the accuracy, convergence, and the efficiency of the method is carried out in the current paperby varying the number of harmonics in the solution approximation. As the main advantage of ...

Abstract Introduction: Arachnoid cysts are developmental cystic lesions which may be found as an incidental finding on neuroimaging or present with symptoms of headache, seizure and neurologic deficit. Presentation with seizure is more common with larger sizes and temporal location. Presentation with TLE is rare, and fenestration of cysts had variable results for seizure control. Here in, we r...

     To evaluate the effects of hydrogel polymer levels (0, 10, 20, 30 g m-2) and NO3:NH4 ratios (0: 100, 25: 75, 50: 50, 75: 25, and 100: 0) on dill seed yield and its essential oil constituents, an experiment was conducted in October 2012 in the experimental field of Islamic Azad University, Jiroft, Iran. Results showed that using 30 g m-2 hydrogel polymer with 75NO3-: 25 NH4+ ratio produced ...

The genus Tanacetum L. is one of the most important medicinal plant that contains 28 species in Iran, 12 of them are endemics. This paper reports the essential oil composition of Tanacetum hololeucum (Bornm.) Podlech; Tanacetum kotschyi (Boiss.) Grierson, growing wild in Iran. Plant flowers were collected from different zones of Dizin in north of Iran. All samples were hydro-distilled (Clevenge...

in this commentary, we endorse concerns about the health impact of the trans-pacific partnership (tpp), paying particular attention to its mechanisms for investor state dispute settlement. we then describe the different, judgeled approach being advocated by the european commission team negotiating the trans-atlantic trade and investment partnership, arguing that, while not perfect, it offers si...