MODELING OF EJECTOR PUMPS OPERATION WITH USING ANSYS

To optimize designs of the ejector pumps being developed, modeling was performed using the ANSYS CFX package. A comparison is made with the experimental data of pressure measurements in chambers of the experimental model

Системы для контролируемого высвобождения и адресной доставки факторов роста в лечении хронических ран

Growth factors (GFs) are endogenous signaling proteins, that regulate cell migration, proliferation and differentiation in tissue regeneration. GFs’ concentrations in chronic wounds are pathologically reduced. This leads to a disruption of the healing process and makes chronic wounds treatment more complicated. There are drugs currently used in clinical practice, that contain GFs in a free form. However, their efficiency for chronic wounds treatment is limited, as GFs are quickly degraded in a proteolytic environment of chronic wounds. In order to overcome this limitation biocompatible molecular systems for targeted delivery and controlled release are proposed, such as: micro- and nanoparticles, hydrogels, scaffolds. GFs roles in the healing process, chronic wounds pathophysiology and molecular systems for GFs targeted delivery and controlled release are reviewed.Факторы роста (ФР) – это эндогенные сигнальные белки, которые регулируют миграцию, пролиферацию и дифференцировку клеток в процессах репарации тканей. Концентрация этих белков в хронических ранах патологически снижена, что приводит к нарушению нормального течения раневого процесса и существенно затрудняет их лечение. В клинической практике используются препараты, содержащие рекомбинантные ФР в свободной форме. Однако их эффективность для лечения хронических ран ограничена, так как в протеолитической среде таких ран ФР подвергаются быстрой деградации. Для преодоления этого недостатка предложены системы для адресной доставки и контролируемого высвобождения на основе биосовместимых материалов: микро- и наночастицы, гидрогели, биопластические материалы. В настоящем обзоре рассмотрены роли ФР в раневом процессе, особенности патофизиологии хронических ран и системы для контролируемого высвобождения и адресной доставки ФР

Incremental proximal methods for large scale convex optimization

Laboratory for Information and Decision Systems Report LIDS-P-2847We consider the minimization of a sum∑m [over]i=1 fi (x) consisting of a large number of convex component functions fi . For this problem, incremental methods consisting of gradient or subgradient iterations applied to single components have proved very effective. We propose new incremental methods, consisting of proximal iterations applied to single components, as well as combinations of gradient, subgradient, and proximal iterations. We provide a convergence and rate of convergence analysis of a variety of such methods, including some that involve randomization in the selection of components.We also discuss applications in a few contexts, including signal processing and inference/machine learning.United States. Air Force Office of Scientific Research (grant FA9550-10-1-0412

Identification of Nedd4 E3 Ubiquitin Ligase as a Binding Partner and Regulator of MAK-V Protein Kinase

MAK-V/Hunk is a scantily characterized AMPK-like protein kinase. Recent findings identified MAK-V as a pro-survival and anti-apoptotic protein and revealed its role in embryonic development as well as in tumorigenesis and metastasis. However molecular mechanisms of MAK-V action and regulation of its activity remain largely unknown. We identified Nedd4 as an interaction partner for MAK-V protein kinase. However, this HECT-type E3 ubiquitin ligase is not involved in the control of MAK-V degradation by the ubiquitin-proteasome system that regulates MAK-V abundance in cells. However, Nedd4 in an ubiquitin ligase-independent manner rescued developmental defects in Xenopus embryos induced by MAK-V overexpression, suggesting physiological relevance of interaction between MAK-V and Nedd4. This identifies Nedd4 as the first known regulator of MAK-V function