here, we present a case of a 78-year-old man that underwent gastrointestinal endoscopy because of one- monthhistory of dysphagia to liquids and solid foods with accompanying weight loss. on endoscopy, there was distalesophageal stenosis. multiple biopsies were obtained. histologic examination of the samples revealed normaltissue. the stenosis was treated by dilatation and abdomino pelvic comput...

background: leiomyomas are the most common benign tumors of the uterus. removal of the prolapsed pedunculated submucous myoma represents a distinct entity. evaluation and treatment of such cases may need intervention via the hymen.mini-laparotomic management of a pedunculated submucous myoma while preserving hymen integrity in a virginal patient is described as a safe alternative.. case: a 30-y...

in the present work a modified in-tube solid phase microextraction technique followed by gas chromatography-mass spectrometry (gc-ms) has been applied for determination of water odorants. geosmin, 2-methyl isoborneol, 2-isopropyl-3-methoxy pyrazine, 2-isobutyl-3-methoxy pyrazine and 2,4,6-trichloroanisol are of the most important odorants which have been studied. in the described method, analyt...

Silica aerogels prepared by the sol-gel process are often used as solid desiccants in enthalpy wheels for dehumidifying ventilation air in air-conditioning systems. These hygroscopic materials have good moisture adsorption and desorption characteristics due to their porous structure. The current study is focused on the evaluation of the mass diffusivity of solid silica aerogels and silica aerog...

An analytical method based on solid phase extraction was developed and validated for analysis of adefovir in human plasma. Adefovir-d4 was used as an internal standard and Synergi MAX RP80A (150 mm×4.6 mm, 4 µm) column provided the desired chromatographic separation of compounds followed by detection with mass spectrometry. The method used simple isocratic chromatographic condition and mass spe...

Non-aqueous electrolyte liquids such as carbonate solvents have been widely employed in the commercial lithium-ion batteries and development of next-generation rechargeable batteries. The decomposition products organic additive molecules contribute to formation solid interphases (SEIs) on electrode surface, which key impacts battery's electrochemical performance. rational engineering systems de...