[The assessment of neurocognitive functions in premature infants in the first year of life using Bayley Scales]. / Otsenka razvitiya neirokognitivnykh funktsii u nedonoshennykh detei pervogo goda zhizni s pomoshch'yu shkaly Beili.

AIM: To reveal the differences in neurocognitive development in premature infants and full-term infants in the first year of life. MATERIAL AND METHODS: The participants were 17 premature infants and 16 sex- and age-matched healthy full-term infants. The gestational age of preterm infants was between 28 and 36 weeks. The Bayley Scales of Infant Development 3rd Edition were used to evaluate neurocognitive abilities in infants. ANCOVA with age as a covariate was used. RESULTS AND CONCLUSION: Preterm infants performed significantly (p≤0.05) worse than the full-term infants on cognitive scale, receptive language, gross motor and fine motor scales. No significant differences were found between preterm and full-term infants on the expressive language scale. Two-way ANOVA revealed no significant (p≤0.05) differences between female premature infants and full-term female infants on the gross motor scale in comparison to male infants. It has been proposed that the prematurity has a specific, but not a global, negative effect on the neurocognitive development in the first year of life with the gender effect on the development of gross motor skills.

Dark-field imaging as a noninvasive method for characterization of whispering gallery modes in microdisk cavities.

Whispering gallery mode microdisk cavities fabricated by direct laser writing are studied using dark-field imaging and spectroscopy in the visible spectral range. Dark-field imaging allows us to directly visualize the spatial intensity distribution of whispering gallery modes. We extract their azimuthal and radial mode indices from dark-field images, and find the axial mode number from the dispersion relation. The scattering spectrum obtained in the confocal arrangement provides information on the density of optical states in the resonator. The proposed technique is a simple noninvasive way to characterize the optical properties of microdisk cavities.

[The inherited procoagulant and prothrombotic condition as the main etiological factor for ischemic stroke in infants].

The data on the risk factors and etiology of ischemic stroke in 31 infants, aged under 3 years, are summarized. The results of genotyping of blood coagulation and folic acid gene polymorphisms in patients and 83 healthy people are presented. Significant differences were found for -455 G>A FGB (р=0.03) and 807 C>T ITGA2 (р=0,005) polymorphisms. Different gene-gene combinations that can cause hypercoagulation and arterial thrombosis in this age were identified. The most frequent combinations include polymorphisms of genes for FGB, fibrinolysis system and folate cycle enzymes (OR=3,79 and more, p<0.05). A clinical case of ischemic stroke in a girl, aged 10 months, after operated congenital heart malformation is presented.

Proximity effects and exchange bias in Co/MnF2(111) heterostructures studied by x-ray magnetic circular dichroism.

Cobalt nano-structured ultrathin films were grown on orthorhombic MnF(2) by molecular beam epitaxy on CaF(2) epitaxial layers deposited on Si(111) substrates. The Co film was grown at room temperature. It was found to be polycrystalline, forming nano-islands with height≈diameter≤10 nm. X-ray absorption evidences the chemical stability of the Co/MnF(2) interface. Remarkably, x-ray magnetic circular dichroism (XMCD) demonstrates that the Co induces a net magnetization on the Mn ions close to the interface. The magnetic moments of these Mn ions couple antiparallel to the Co and rotate upon field reversal following the magnetization of the Co both below and high above the Néel temperature of MnF(2) (T(N) = 67 K). The density of coupled Mn moments is found to be temperature dependent, with an equivalent thickness of ~1.5 MnF(2) monolayers at 20 K, decreasing to about ~0.5 ML as the temperature is raised to 300 K. Interestingly, the intensity of the Mn XMCD signal appears to be related to the coercivity of the Co layer. This behavior is interpreted in terms of the competition between thermal fluctuations, exchange coupling between Co and Mn at the interface and, at low temperature, the antiferromagnetic order in MnF(2).