High-T(c) squid application in medicine and geophysics

In our laboratory of high-T(sub c), a one-hole squid was built from Y1Ba2Cu3O(7-x) ceramics obtained by a standard procedure of solid state reaction. The ceramics with critical current density J(sub c) is greater than 100 A/sq cm was selected. In the middle of a 10 x 10 x 2 mm ceramics pellet, a 0.8 mm hole was drilled in which the superconducting loop of the squid was located. Between the hole and the edge of the pellet, a cut was mechanically filed out with a bridge inside it connecting the superconducting ring. A scheme of the magnetometer is presented. The resonant frequency shift of the tank circuit, the connection of the squid with this circuit, and the squid inductance are evaluated. One of the most interesting fields of the squid-based magnetometer application is biomagnetism, particularly, the human heart magnetocardiogram measuring. The low-temperature squids were used in this area and many interesting and important scientific results have been obtained. The observations have shown that the main noise contribution was not due to the squid but to the Earth's magnetic field variations, industrial inductions, and mainly to the vibrations caused by liquid nitrogen boiling and by vibrations of the box. Further attempts are needed to reduce the magnetic noise inductions. Nevertheless, the estimations promise the maximum signal/noise relation of the high-T(sub c) squid-magnetocardiometer to be not less than 10:1 in a bandwidth of 60 Hz. Apparently, such resolution would be enough not only for steady cardiogram reading but even for thin structure investigation at average technique application

High-T(sub c) squid application in medicine and geophysics

In the Laboratory a high-T(sub c) one-hole squid was built from Y1Ba2Cu3O(7-x) ceramics obtained by a standard procedure of solid state reaction. The ceramics with critical current density J(sub c) is greater than 100 A/sq cm was selected. In the middle of 10 x 10 x 2 mm ceramics pellet a 0.8 mm hole was drilled in which superconducting loop of the squid was located. Between the hole and the edge of the pellet a cut was mechanically filed out with a bridge inside it connecting the superconducting ring. A scheme of the magnetometer is presented. The resonant frequency shift of the tank circuit, the connection of the squid with this circuit, and the squid inductance are evaluated. One of the most interesting fields of the squid-based magnetometer application is biomagnetism, particularly, the human heart magnetocardiogram measuring. The low-temperature squids were used in this area and many interesting and important scientific results have been obtained. The observations have shown that the main noise contribution was not due to the squid but to the Earth's magnetic field variations, industrial inductions, and mainly to the vibrations caused by liquid nitrogen boiling and by vibrations of the box. Further attempts are needed to reduce the magnetic noise inductions. Nevertheless, the estimations promise the maximum signal/noise relation of the high-T(sub c) squid-magnetocardiometer to be not less than 10:1 in a bandwidth of 60 Hz. Apparently, such resolution would be enough not only for steady cardiogram reading but even for thin structure investigation at average technique application

Modern state and prospects of dermatoglyphics research in practice of medical-psychological examination of students and youth

The modern state and prospects of the medico-psychological examination of students and young people are analysed by a dermatoglyphics that allows drawing up the psychological portrait of a person. On the basis of typology of digital dermatoglyphics the development of the criteria system for prognostic estimation of physical capabilities of a human being is possible. According to the ratio of norm and pathology areas of the skin markings the hereditary diseases for future posterity, developmental abnormalities, different gene mutations, congenital development defects (limbs development defects as the special case), gender anomalies (sex determination), possible lethal cases, chromosome diseases and other cases can be forecasted with 99 % confidence

Modern problems of tuberculosis in Ukraine

Проведено аналіз захворюваності на туберкульоз у підлітків. Вивчено ранні та явні його прояви. Проаналізовано ефективність сучасної флюорографії та технології введення БЦЖ. Виявлено що позитивна реакція Манту спостерігається у 16 % випадків і переважно у людей з недиференційованим типом мікобактерій. Установлено, що метод масового флюорографічного дослідження населення, який широко застосовується в Україні, визначає не ранні, а застарілі ущільнені (кальциновані) або деструктивні, у вигляді розпаду, форми туберкульозу.Проведен анализ заболеваемости туберкулезом у подростков. Изучены ранние и явные его проявления. Проанализирована эффективность современной флюорографии и технологии введения БЦЖ. Выявлено что положительная реакция Манту наблюдается в 16% случаев и преимущественно у людей с недифференцированным типом микобактерий. Установлено, что метод массового флюорографического исследования населения, широко применяется в Украине, определяет не ранние, а устаревшие уплотнены (кальцинированные) или деструктивные, в виде распада, формы туберкулеза.Analysis of tuberculosis for the teenagers was conducted and the early and manifestative developments of tuberculosis were studied. The effectiveness of modern fluorography and techniques of BCG (Bacillus Calmette-Guerin) immunisation is analysed. It was found that the positive Mantoux test is observed in 16 % cases and mainly among people with the undifferentiated type of mycobacterium. We suppose that the mass fluorography of people which is obligatory used in Ukraine doesn’t determine early forms but only old indurated (calcinated) or destructive (disintegrated) forms of tuberculosis

Redox-induced change in the ligand coordination mode

© 2014 American Chemical Society. The reaction of cobalt(II) pivalate with a spin-labeled Schiff base (HL1) in organic solvents formed trinuclear complex [Co3(Piv)2L1 2L2 2]·Solv (Solv is Me2CO and/or C7H16 and CH3CN) containing both nitroxide L1 and the product of its single-electron reduction, nitrone L2. The formation of [Co3(Piv)2L1 2L2 2] was a consequence of an unusual phenomenon, which we called "redox-induced change in the ligand coordination mode". A reduction of L1 to L2 led to a change in the set of donor atoms and even in the size of the metallocycle. This phenomenon was also found for mononuclear [CrL1 2L2] and [FeL1 2L2]·Me2CO

Class I methanol masers in low-mass star formation regions

Four Class I maser sources were detected at 44, 84, and 95 GHz toward chemically rich outflows in the regions of low-mass star formation NGC 1333I4A, NGC 1333I2A, HH25, and L1157. One more maser was found at 36 GHz toward a similar outflow, NGC 2023. Flux densities of the newly detected masers are no more than 18 Jy, being much lower than those of strong masers in regions of high-mass star formation. The brightness temperatures of the strongest peaks in NGC 1333I4A, HH25, and L1157 at 44 GHz are higher than 2000 K, whereas that of the peak in NGC 1333I2A is only 176 K. However, rotational diagram analysis showed that the latter source is also a maser. The main properties of the newly detected masers are similar to those of Class I methanol masers in regions of massive star formation. The former masers are likely to be an extension of the latter maser population toward low luminosities of both the masers and the corresponding YSOs.Comment: 5 pages, 1 figure, Proc. IAU Symp. 287 "Cosmic Masers: from OH to H0". LSR velocities of the HH25 masers, which are presented in Table 1, are correcte

СРАВНЕНИЕ ЭФФЕКТИВНОСТИ ПРОТОННОЙ И ФОТОННОЙ ТЕРАПИИ У ПАЦИЕНТОВ С ГЛИОМАМИ ГОЛОВНОГО МОЗГА

Owing to the development of molecular genetics, the role of radiation therapy and chemotherapy in treatment of patients with glioma (WHO Grade I–IV) has become more understandable. The overall survival among glioma patients has increased. As overall survival increases, oncologists are more likely to detect manifestations of late radiation toxicity that has a huge impact on Quality of Life in patients who have undergone radiation therapy in the past. In this regard, the question of finding more adequate radiation therapy techniques remains relevant. photon radiation therapy is the standard method; however, considering dosimetric advantages of proton therapy over photon therapy, its widespread use can potentially lead to the increased overall survival, decreased number of late radiation-induced complications and improved quality of life in the post-radiation period. This article presents some comparative characteristics of proton and photon radiation therapy in patients with gliomas (WHO Grade I–IV). dosimetry characteristics of protons in tissues were compared, data showing differences in survival of patients treated with photons versus patients treated with protons were presented, and general information on early and late  radiation-induced toxicity arising from the treatment by these methods was disclosed.Благодаря развитию молекулярной генетики стала более понятной роль лучевой терапии и химиотерапии в лечении пациентов с глиомами различной степени злокачественности. Результатом этого является увеличение общей выживаемости у пациентов с данной патологией. По мере увеличения сроков выживаемости врачи чаще встречаются с проявлениями поздней лучевой токсичности, снижающими качество жизни у пациентов, прошедших лучевую терапию. В связи с этим остается актуальным вопрос о поиске оптимальных для пациентов методик лучевой терапии. Стандартным методом служит дистанционная фотонная лучевая терапия, однако, учитывая дозиметрические преимущества протонной терапии, её широкое применение потенциально может привести к увеличению общей выживаемости, уменьшению количества поздних лучевых осложнений и повышению качества жизни в постлучевом периоде. В данной работе приводятся некоторые сравнительные характеристики протонной и фотонной лучевой терапии у пациентов с глиомами различной степени злокачественности (WHO Grade I–IV). Так, приводятся особенности дозиметрического распределения протонов в тканях, приведены данные исследований, показывающих различия в выживаемости у пациентов, пролеченных фотонами, и пациентов, пролеченных протонами, а также раскрываются общие сведения о ранней и поздней лучевой токсичности, возникающей при лечении этими методиками