Effect of one variant of Ti3Ni4 particles on stress-induced martensitic transformations in <111>-oriented Ti49.2Ni50.8 single crystals

In the present study the effects of stress-assisted aging of the Ti49.2Ni50.8 single crystals oriented along [11] direction on the stress-induced B2-R-B19' thermoelastic martensitic transformations and superelasticity are investigated. It is experimentally established that aging at 823 K for 1h under compression stress of 150 MPa along [11] direction leads to the precipitation of one crystallographic variant of Ti3Ni4 particles of 350(±30) nm in size. Precipitation the single variant of Ti3Ni4 particle results in an appearance of homogeneous long-range internal stress field || ≈ 65 MPa, that defines the main features of stress-induced B2-R-B19' transformation and determines the increase in the characteristic temperatures of martensitic transformation and the existence of two-way shape memory effect

Modeling Insertional Mutagenesis Using Gene Length and Expression in Murine Embryonic Stem Cells

Background. High-throughput mutagenesis of the mammalian genome is a powerful means to facilitate analysis of gene function. Gene trapping in embryonic stem cells (ESCs) is the most widely used form of insertional mutagenesis in mammals. However, the rules governing its efficiency are not fully understood, and the effects of vector design on the likelihood of genetrapping events have not been tested on a genome-wide scale. Methodology/Principal Findings. In this study, we used public gene-trap data to model gene-trap likelihood. Using the association of gene length and gene expression with gene-trap likelihood, we constructed spline-based regression models that characterize which genes are susceptible and which genes are resistant to gene-trapping techniques. We report results for three classes of gene-trap vectors, showing that both length and expression are significant determinants of trap likelihood for all vectors. Using our models, we also quantitatively identifie

ИНФОРМАЦИОННОЕ И МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ НАДЕЖНОСТИ ПРОФЕССИОНАЛЬНОЙ ДЕЯТЕЛЬНОСТИ ОПЕРАТОРОВ

Information and mathematical models for risk assessment of reduced reliability professional personnel carrier hazardous industries are developed. A method of mathematical prognosis risk of reduced reliability of operators are proposed.Разработаны информационная и математическая модели оценки риска снижения надежности профессиональной деятельности операторского персонала опасных производств. Предложен метод математического прогнозирования риска снижения надежности операторов

Effect of one variant of Ti3Ni4 particles on stress-induced martensitic transformations in <111>-oriented Ti49.2Ni50.8 single crystals

In the present study the effects of stress-assisted aging of the Ti49.2Ni50.8 single crystals oriented along [11] direction on the stress-induced B2-R-B19' thermoelastic martensitic transformations and superelasticity are investigated. It is experimentally established that aging at 823 K for 1h under compression stress of 150 MPa along [11] direction leads to the precipitation of one crystallographic variant of Ti3Ni4 particles of 350(±30) nm in size. Precipitation the single variant of Ti3Ni4 particle results in an appearance of homogeneous long-range internal stress field || ≈ 65 MPa, that defines the main features of stress-induced B2-R-B19' transformation and determines the increase in the characteristic temperatures of martensitic transformation and the existence of two-way shape memory effect

Research of photoluminescent properties of selenide cadmium CdSe nanocrystals intended for use in clinical diagnostics

Исследованы параметры возбуждения, поглощения и фотолюминесценции нанокристаллов CdSe и CdSe/ZnS, полученных методами коллоидной химии и предназначенных для применения в иммунолюминесцентном анализе в медицине, а также фотостабильность нанокристаллов CdSe/ZnS, покрытых различными функционально-защитными полимерными оболочками. Методами спектрофотометрии установлено, что фотолюминесценция нанокристаллов может быть возбуждена широким спектром светового излучения, а именно, от ультрафиолетового света до видимой части светового излучения. При нанесении на ядро CdSe эпитаксиальной пленки ZnS интенсивность фотолюминесценции возрастает без смещения длины волны максимума интенсивности фотолюминесценции. Нанокристаллы CdSe/ZnS в функционально-защитной полимерной оболочке обладают лучшей фотостабильностью в сравнении с химическим флюорохромом, традиционно применяемым в клинической диагностике. Фотостабильность нанокристаллов CdSe/ZnS не зависит от типа использованных в эксперименте функционально-защитных полимерных оболочек и от образования конгломератов из наночастиц

INFORMATION SUPPORT RESEARCH OF person attention PARAMETERS

There are given the research results of attention parameters under the influence stress sound using modified proofreading test «Landolt Rings». There are accomplished noise influence evaluation of subject error amount, nature and degree

Processing of Large Amounts of Information for Reconstructive Facial Surgery

There is a possibility to obtain a 3-d model of the facial skull bones and a vector counter file of damaged bones based on a set of output files from an X-ray computed tomography to manufacture an individual implants

A novel putative helicase produced in early murine lymphocytes.

International audienceDNA helicases (Hel) play a role in a number of processes involving DNA strand separation, including replication, repair, recombination and transcription. Rearrangement of receptor genes, which occurs in immature lymphocytes, could also be mediated by Hel. We report here the cloning from murine fetal thymus tissue of a novel putative Hel containing seven conserved Hel domains and belonging to the DEGH subclass of DNA Hel. We term the encoding gene lsh (lymphoid-specific Hel), since the gene is expressed in early thymocytes, but not in heart, liver, lung, muscle, brain or kidney, as judged by Northern analysis. Spleen cells expressed lsh following activation. T- and B-cell lines, at both the immature and mature stage, expressed lsh. To examine the earliest stages of lymphopoiesis, mouse embryonic tissues were examined; lsh was not detected in the yolk sac of day 12 of gestation, but was expressed in fetal liver and at high levels in fetal thymus at day 15 of gestation