8He Spectroscopy in Stopped Pion Absorption By 9Be

Level structure of 8He has been studied in the reaction of stopped pion absorption by 9Be nuclei. The missing mass spectrum in the range 0 MeV ≤ MM ≤ 10 MeV has been described by the superposition of phase-space distributions and the three states of 8He. Parameters of these states have been compared with data of other experimental and theoretical works

From AKNS to derivative NLS hierarchies via deformations of associative products

Using deformations of associative products, derivative nonlinear Schrodinger (DNLS) hierarchies are recovered as AKNS-type hierarchies. Since the latter can also be formulated as Gelfand-Dickey-type Lax hierarchies, a recently developed method to obtain 'functional representations' can be applied. We actually consider hierarchies with dependent variables in any (possibly noncommutative) associative algebra, e.g., an algebra of matrices of functions. This also covers the case of hierarchies of coupled DNLS equations.Comment: 22 pages, 2nd version: title changed and material organized in a different way, 3rd version: introduction and first part of section 2 rewritten, taking account of previously overlooked references. To appear in J. Physics A: Math. Ge

Выбор оптимального варианта разметки метастатических лимфатических узлов у больных раком молочной железы

Often, neoadjuvant treatment in patients with locally advanced breast cancer leads to complete clinical and pathomorphological regression of not only the primary tumor, but metastatic lymph nodes also. Currently, discussions are ongoing regarding the optimal volume of surgical intervention on regional lymph nodes in this category of patients. As a de-escalation of classical lymphadenectomy, a method of targeted axillary dissection (TAD) is used, which presumes a biopsy of sentinel lymph nodes (SLN) with the removal of a previously marked metastatic lymph node. Our study is aimed at choosing the most optimal method for labeling a metastatic lymph node. The study included 63 patients diagnosed with stage T1–3N1M0 breast cancer, all divided into two comparison groups: 29 patients had a radiopaque label placed in the metastatic lymph node before neoadjuvant therapy, and 33 patients had a radioisotope label (with I125).After the neoadjuvant treatment completion, all patients with complete clinical response in the lymph nodes underwent targeted axillary lymphadenectomy. We evaluated the time of the surgical intervention, the length of the skin incision, the presence of complications when using one or another type of marking. Based on the results of statistical analysis, we propose a variant with a radioisotope label for implementation into the clinical practice. This method, in our opinion, presented the best qualities, reliability and convenience for the surgeon, comfort for the patient.Нередко проведение неоадъювантного лекарственного лечения у пациенток с местно-распространенной формой рака молочной железы приводит к полной клинической и патоморфологической регрессии не только самой первичной опухоли, но и метастатических лимфатических узлов. В настоящее время продолжаются дискуссии относительно оптимального объема хирургического вмешательства на региональных лимфоузлах у этой категории больных. В качестве деэскалации классической лимфаденэктомии применяется такой метод, как таргетная аксиллярная диссекция (ТАД), а именно проведение биопсии «сторожевых» лимфоузлов (БСЛУ) с удалением ранее размеченного метастатического лимфоузла. Наше исследование нацелено на выбор наиболее оптимального способа маркировки метастатического лимфоузла. В работу были включены 63 пациентки с диагнозом рак молочной железы T1–3N1М0 стадии, все разделены на две группы сравнения: 29 пациенткам до проведения неоадъювантной терапии в метастатический лимфоузел была установлена рентгенконтрастная метка, а 33 больным — радиоизотопная метка (с I125). После окончания лекарственного лечения всем больным с полным лечебным патоморфозом на лимфоузлах выполнена таргетная аксиллярная лимфаденэктомия. В работе учитывалось время выполнения оперативного вмешательства, длина кожного разреза, наличие осложнений при использовании того или иного вида разметки. Опираясь на полученные результаты статистического анализа, для внедрения в клиническую практику мы предлагаем вариант с радиоизотопной меткой. Именно этот метод, на наш взгляд, представил наилучшие качества, а именно надежность и удобство для врача-хирурга, комфорт для пациента

Growth and characterization of urea-doped KDP crystals

Potassium dihydrophosphate single crystals were grown from aqueous solutions onto a point seed using temperature reduction method by doping with different molar values of Urea. The characterization of the grown crystals was made by visible and fourier transform infrared spectroscopy, Vicker's hardness studies, X-ray powder diffraction, nonlinear optical and laser damage threshold measurements. By comparing these crystals with the ones grown from the pure solution, it is shown that 0.2/2.0 M of the Urea additive enhances the laser damage threshold and the second harmonic efficiency more than by 25 and 20 %, respectively. The Vicker's hardness studies carried out on (100) and (001) crystallographic planes show an increased hardness of the doped crystals (grown in the presence of Urea additive) on the plane (001) in comparison with that of pure potassium dihydrophosphate crystal

Mechanisms of hydrogen isotope formation during preequilibrium stage of stopped pion absorption reaction

Section II. Experimental Investigations of Nuclear Reactions Mechanism

Mechanisms of hydrogen isotope formation during preequilibrium stage of stopped pion absorption reaction

Section II. Experimental Investigations of Nuclear Reactions Mechanism