6 research outputs found

    ИССЛЕДОВАНИЕ СТРОЕНИЯ И МЕХАНИЗМА ОБРАЗОВАНИЯ В ХЛОРИДНЫХ РАСТВОРАХ НИТЕВИДНЫХ СВИНЦОВЫХ ГУБОК

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    The results of experimental and theoretical researches of nanostructural filamentary lead sponge formation from chloride solutions are presented. It is established that such sponge with filament width of approximately 100 nm represents the hydrogen stabilized structure consisting of lead conglomerates (2-5 nm in size). The lead filamentary structure fragments are shown to remain unchanged in solid state for enough long time.Представлены результаты экспериментальных и теоретических исследований образования из хлоридных растворов наноструктурных нитевидных свинцовых губок. Установлено, что такая губка с толщиной нитей порядка 100 нм представляет собой структуру, состоящую из конгломератов свинца (размером 2–5 нм), стабилизированную водородом. Показано, что фрагменты нитевидной структуры свинца сохраняются в твердом состоянии достаточно продолжительное время

    ИССЛЕДОВАНИЕ МЕХАНИЗМА ОБРАЗОВАНИЯ И СТРОЕНИЯ ВЫСОКОПОРИСТОГО ГУБЧАТОГО СЕРЕБРА

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    The methods of production and the results of investigation of high-porous spongy silver and morphology of its formation are presented. The product is shown to represent nanostructure consisting of silver particles of 100–200 nm in size, accreted with one another into conglomerates of branched forms. Examples of possible application of nanostructural high-porous spongy silver are given.Представлены методы получения и результаты исследования высокопористого губчатого серебра и морфологии его образования. Показано, что этот продукт представляет собой наноструктуру, состоящую из частиц серебра размером 100–200 нм, сросшихся между собой в конгломераты разветвленной формы. Даны примеры возможного использования наноструктурного высокопористого губчатого серебра

    Functional and Radiological Imaging of Neuroendocrine Neoplasms

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    Imaging of neuroendocrine neoplasms (NENs) is extremely rich and varied. Conventional techniques of morphological imaging (ultrasound, CT, MRI) are complementary to other imaging techniques such as endoscopic explorations and functional imaging using radiopharmaceutical imaging techniques. NENs have very distinct functional characteristics, which make them ideal targets for functional molecular imaging. Functional imaging plays a crucial role in the assessment of initial tumor distribution (staging), disease assessment after therapy (restaging), disease follow-up, and planning for somatostatin receptor (SSTR) 2-based radiopeptide treatment. Other tracers, such as 123I-metaiodobenzylguanidine (123I-MIBG) scintigraphy or 18F-DOPA (dihydroxyphenylalanine) and the SSTR2-antagonist (NODAGA-JR11) PET/CT have been developed for specific indications or to gain sensitivity and specificity. The more aggressive, less differentiated neuroendocrine carcinomas tend to have less SSTR2 receptor expression, and the tumor cell metabolism shifts toward anaerobic glycolysis. In these patients, receptor-based imaging should be complemented or replaced by metabolic 18F-FDG (18F-fluorodeoxyglucose) PET/CT. The continuum from well-differentiated neuroendocrine tumor to a more aggressive neuroendocrine carcinoma makes functional imaging sometimes challenging
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