PROCESSES OF POLARIZATION IN COMPLICATED STRUCTURE OF DIELECTRICS WITH COAXIAL DISPOSITION

In this article authors examine the question of watt losses in polarization of dielectrics and their influence on dielectric properties of insulation which has a complex structure. In the article there are some graphs of quantitative and qualitative dependence of some characteristics from temperature for performance measurement of the material of insulation. It is shown that for choice of elements and structures it is necessary to take into account the coefficient of permittivity of material

Numerical modeling of block structure dynamics: application to the Vrancea region and study of earthquake sequences in the synthetic catalogs

Consiglio Nazionale delle Ricerche (CNR). Biblioteca Centrale / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

Pericentric inversion inv(7)(p11q21.1): report on two cases and genotype-phenotype correlations

We report on two unrelated cases of pericentric inversion 46,XY,inv(7)(p11q21.1) associated with distinct pattern of malformation including mental retardation, development delay, ectrodactyly, facial dismorphism, high arched palate. Additionally, one case was found to be characterized by mesodermal dysplasia. Cytogenetic analysis of the families indicated that one case was a paternally inherited inversion whereas another case was a maternally inherited one. Molecular cytogenetic studies have shown paternal inversion to have a breakpoint within centromeric heterochromatin being the cause of alphoid DNA loss. Maternal inversion was also associated with a breakpoint within centromeric heterochromatin as well as inverted euchromatic chromosome region flanked by two disrupted alphoid DNA blocks.Описаны два неродственных случая перицентрической инверсии 46,XY,inv(7)(p11q21.1), связанной с умственной отсталостью, задержкой развития, эктродактилией, аномалиями лица, готическим небом. Помимо этого, в одном случае наблюдали мезодермальную дисплазию. Цитогенетический анализ семей показал, что в одном случае инверсия имела отцовское происхождение, в другом – материнское. С помощью молекулярно-цитогенетических исследований было определено, что точка разрыва инверсии отцовского происхождения локализована в центромерном гетерохроматине и связана с потерей альфоидной ДНК. При анализе инверсии материнского происхождения было показано, что точки разрыва также локализованы в центромерном гетерохроматине и эухроматине участка 7q21–q22, а также ивертированный эухроматиновый участок расположен между двумя перестроенными блоками альфоидной ДНК

Chimerism and multiple numerical chromosome imbalances in a spontaneously aborted fetus

We report on a case of chimerism and multiple abnormalities of chromosomes 21, X and Y in spontaneous abortion specimen. To the best our knowledge the present case is the first documented chimera in a spontaneously aborted fetus. The application of interphase fluorescence in situ hybridization (FISH) using chromosome enumeration and site-specific DNA probes showed trisomy X in 92 nuclei (23 %), tetrasomy X in 100 nuclei (25 %), pentasomy of chromosome X in 40 nuclei (10 %), XXY in 36 nuclei (9 %), XXXXXXYY in 12 nuclei (3 %), XXXXXYYYYY in 8 nuclei (2 %), trisomy 21 and female chromosome complement in 40 nuclei (10 %), normal female chromosome complement in 72 nuclei (18 %) out of 400 nuclei scored. Our experience indicates that the frequency of chimerism coupled with multiple chromosome abnormalities should be no less than 1 : 400 among spontaneous abortions. The difficulties of chimerism identification in fetal tissues are discussed

Reconstruction of lithosphere motions using numerical modelling of block structure dynamics: application to the Vrancea region

Biblioteca Centrale CNR / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

Numerical modelling of block-structure dynamics: application to the Vrancea region

Supported by U.S. National Science Foundation (grant EAR 94 23818), by NATO (linkage grants ENVIRLG 931206 and CN SUPLL 940880 and by the Commission of European Communities (COPERNICUS project CIPA CT 94-0238Consiglio Nazionale delle Ricerche (CNR). Biblioteca Centrale / CNR - Consiglio Nazionale delle RichercheSIGLEITItal