The dynamics of element content in patients with lung cancer during radiotherapy

Determination of the element contents in the biological samples (blood, serum of blood, hair) of patients with the diagnosis of lung cancer III degree is carried out during beam therapy. The method of PIXE excited by protons on the accelerator with energy 3 MeV has been used. During radiotherapy the difference in the element contents in hair of patients has not been detected. Trustworthy reduction of Fe, Cu, Mn, Ca, Sr, Rb etc is marked during treatment. The obtained results can be used as the additional test at carrying out adequate treatment in radiotherapy.Проведено визначення вмiсту мiкроелементiв в бiологiчних зразках (кров, сироватка кровi, волосся) пацiєнтiв з дiагнозом раку легенi III ступеня в процесi променевої терапiї. Використовувався метод характеристичного рентгенiвського випромiнювання, яке збуджувалось протонами прискорювача з енергiєю 3 МеВ. Протягом радiотерапiї вiдмiнностей у вмiстi елементiв у волоссях пацiєнтiв виявлено не було. У процесi лiкування вiрогiдно виявлене зменшення Fe, Cu, Mn, Ca, Sr, Rb i т.д. в кровi i сироватцi кровi. Отриманi результати можуть бути використанi як додатковий тест при проведеннi адекватної терапiї в курсi променевого лiкування.Проведено определение содержания микроэлементов в биологических образцах (кровь, сыворотка крови, волосы) пациентов с диагнозом рака легкого III степени в процессе лучевой терапии. Использован метод характеристического рентгеновского излучения, возбуждаемого протонами на ускорителе с энергией 3 МэВ. В течение радиотерапии отличий в содержании элементов в волосах пациентов обнаружено не было. В процессе лечения достоверно обнаружено уменьшение Fe, Cu, Mn, Ca, Sr, Rb и т.д. в крови и сыворотке крови. Полученные результаты могут быть использованы в качестве дополнительного теста при проведении адекватной терапии в курсе лучевого лечения

Role of dislocations in formation of ohmic contacts to heavily doped n-Si

We present experimental results concerning a high density of structural defects (in particular, dislocations) in the near-contact region of heavily doped n-silicon. They appear in the course of firing Au Pd Ti Pd -Si n ohmic contact at 450С for 10 min in a vacuum of ~10 Pa⁻⁴ . These defects lead to appearance of metal shunts that determine the current flow mechanism in these ohmic contacts. The calculated and experimental temperature dependences of contact resistivity, ρс(Т), are in good agreement. It is shown that ρс increases with temperature. This is characteristic of a model of ohmic contacts with a high dislocation density in the near-contact region of semiconducto

On a feature of temperature dependence of contact resistivity for ohmic contacts to n-Si with an n⁺ -n doping step

We present both theoretical and experimental temperature dependences of contact resistivity ρс(Т) for ohmic contacts to the silicon n⁺ -n-structures whose n⁺ -layer was formed using phosphorus diffusion or ion implantation. The ρс(Т) dependence was measured in the 125–375 K temperature range with the transmission line method, with allowance made for conduction in both the n⁺ -layer and n⁺ -n doping step

Polarization phenomena in the intermediate energy elastic deuteron scattering from

A model based on the multiple diffraction scattering theory and the α-cluster model with dispersion of target nuclei is proposed for describing the behavior of observables for the elastic deuteron scattering from 12C and 16O nuclei at intermediate energies. Differential cross-sections and analyzing powers calculated within this approach for incident-deuteron energies of 400 and 700 MeV are in a reasonable agreement with experimental data

A geochemical model for fumaroles of the Mutnovsky volcano, Kamchatka, USSR

On the basis of the chemical, isotopic and thermodynamic characteristics of fluids sampled between 1964 and 1989 a genetic model description is given for fumaroles of the Mutnovsky volcano. There are three individual groups of fumaroles in the Mutnovsky crater which show stable activity for a long period of time: “the Active Funnel” (temperatures exceed 600°C), the “Upper Field” (up to 320°C) and the “Bottom Field” (from 100 to 150°C). The three principal zones of emission have different gas composition, water isotopic composition, radioactivity and 3He/4He ratios. The abundance of magmatic components in the high-temperature fumaroles of the “Active Funnel” is much higher than those in gases from the other groups. Emission rate of SO2 from the “Active Funnel” is about 200 t/d, which requires complete degassing as a minimum of 1 km3 of magma every 20 years. Fluids of the “Upper Field” contain up to 80% of steam from the Mutnovsky geothermal system. Temperature variations of the “Bottom Field” fumaroles (from 97°C before 1982 to 151°C in 1989) result from changes in hydrological conditions in the crater. Evaporation of high-saline acid brine which is formed in the interior of the volcano is responsible for the composition of the “Bottom Field” gas-steam discharges