Comparison of Flow and Transport Experiments on 3D Printed Micromodels with Direct Numerical Simulations

Understanding pore-scale flow and transport processes is important for understanding flow and transport within rocks on a larger scale. Flow experiments on small-scale micromodels can be used to experimentally investigate pore-scale flow. Current manufacturing methods of micromodels are costly and time consuming. 3D printing is an alternative method for the production of micromodels. We have been able to visualise small-scale, single-phase flow and transport processes within a 3D printed micromodel using a custom-built visualisation cell. Results have been compared with the same experiments run on a micromodel with the same geometry made from polymethyl methacrylate (PMMA, also known as Perspex). Numerical simulations of the experiments indicate that differences in experimental results between the 3D printed micromodel and the Perspex micromodel may be due to variability in print geometry and surface properties between the samples. 3D printing technology looks promising as a micromodel manufacturing method; however, further work is needed to improve the accuracy and quality of 3D printed models in terms of geometry and surface roughness

Comparison of Flow and Transport Experiments on 3D Printed Micromodels with Direct Numerical Simulations

International audienceUnderstanding pore-scale flow and transport processes is important for understanding flow and transport within rocks on a larger scale. Flow experiments on small-scale micromodels can be used to experimentally investigate pore-scale flow. Current manufacturing methods of micromodels are costly and time consuming. 3D printing is an alternative method for the production of micromodels. We have been able to visualise small-scale, single-phase flow and transport processes within a 3D printed micromodel using a custom-built visualisation cell. Results have been compared with the same experiments run on a micromodel with the same geometry made from polymethyl methacrylate (PMMA, also known as Perspex). Numerical simulations of the experiments indicate that differences in experimental results between the 3D printed micromodel and the Perspex micromodel may be due to variability in print geometry and surface properties between the samples. 3D printing technology looks promising as a micromodel manufacturing method; however, further work is needed to improve the accuracy and quality of 3D printed models in terms of geometry and surface roughness

Extragenital malignant mixed Müllerian tumor. Case report and review of the literature.

The second case of extragenital malignant mixed Müllerian tumor, heterologous type, occurring in the posterior peritoneum, and confirmed at autopsy, is presented. The histogenesis of this tumor is discussed

Comparison of Flow and Transport Experiments on 3D Printed Micromodels with Direct Numerical Simulations

Understanding pore-scale flow and transport processes is important for understanding flow and transport within rocks on a larger scale. Flow experiments on small-scale micromodels can be used to experimentally investigate pore-scale flow. Current manufacturing methods of micromodels are costly and time consuming. 3D printing is an alternative method for the production of micromodels. We have been able to visualise small-scale, single-phase flow and transport processes within a 3D printed micromodel using a custom-built visualisation cell. Results have been compared with the same experiments run on a micromodel with the same geometry made from polymethyl methacrylate (PMMA, also known as Perspex). Numerical simulations of the experiments indicate that differences in experimental results between the 3D printed micromodel and the Perspex micromodel may be due to variability in print geometry and surface properties between the samples. 3D printing technology looks promising as a micromodel manufacturing method; however, further work is needed to improve the accuracy and quality of 3D printed models in terms of geometry and surface roughness.This article is published as Watson, Francesca, Julien Maes, Sebastian Geiger, Eric Mackay, Mike Singleton, Thomas McGravie, Terry Anouilh et al. "Comparison of Flow and Transport Experiments on 3D Printed Micromodels with Direct Numerical Simulations." Transport in Porous Media (2018). doi: 10.1007/s11242-018-1136-9.</p

Behavioral Manifestations Of White Mice Under Conditions Of Erythropoietin Action

Гасюк, О. М. Поведінкові прояви білих мишей в умовах дії еритропоетину / О. М. Гасюк, Т. О. Половинко // Збірник матеріалів Всеукраїнської студентської науково-практичної конференції [“STEM–освіта як напрям модернізації методик навчання природничо-математичних дисциплін у середніх і вищих навчальних закладах”] (м. Херсон, 26-27 квітня 2018 р.) / укладач : В. Д. Шарко. – Херсон: Видавництво ХНТУ. – 2018. – Випуск 18. – С. 120-122. (Пошук молодих).Еритропоетин (ЕПО) є одним з найважливіших стимуляторів еритропоезу ссавців. Є дані, що введення ЕПО покращує процеси сприйняття, памяті здатність до запам’ятовування, процеси мислення та уваги. Терапія цим препаратом має гарні результати при вторинних енцефалопатіях та при первинних захворюваннях нервової системи. Але й дотепер залишаються відкритими питання щодо особливостей тривалого впливу ЕПО на поведінку, когнітивні процеси та залежність такого впливу від дози препарату. Мета дослідження – вивчення поведінкової активності та окремих когнітивних процесів мишей в умовах дії еритропоетину. Erythropoietin (EPO) is one of the most important mammalian erythropoiesis stimulators. There is evidence that the introduction of EPO improves processes of perception, memory ability to memorize, processes of thinking and attention.Therapy with this drug has good results in secondary encephalopathies and in primary diseases of the nervous system. But even so far, open questions about the peculiarities of the long-term effects of the EPO on behavior, cognitive processes and the dependence of such effects on the dose of the drug remain. The purpose of the study is to study the behavioral activity and individual cognitive processes of mice under the conditions of erythropoietin action

Forced expression of the non-coding RNA miR-17∼92 restores activation and function in CD28-deficient CD4+ T&nbsp;cells

CD28 provides the prototypical costimulatory signal required for productive T-cell activation. Known molecular consequences of CD28 costimulation are mostly based on studies of protein signaling molecules. The microRNA cluster miR-17∼92 is induced by T&nbsp;cell receptor stimulation and further enhanced by combined CD28 costimulation. We demonstrate that transgenic miR-17∼92 cell-intrinsically largely overcomes defects caused by CD28 deficiency. Combining genetics, transcriptomics, bioinformatics, and biochemical miRNA:mRNA interaction maps we empirically validate miR-17∼92 target genes that include several negative regulators of T&nbsp;cell activation. CD28-deficient T&nbsp;cells exhibit derepressed miR-17∼92 target genes during activation. CRISPR/Cas9-mediated ablation of the miR-17∼92 targets Pten and Nrbp1 in naive CD28-/- CD4+ T&nbsp;cells differentially increases proliferation and expression of the activation markers CD25 and CD44, respectively. Thus, we propose that miR-17∼92 constitutes a central mediator for T&nbsp;cell activation, integrating signals by the TCR and CD28 costimulation by dampening multiple brakes that prevent T&nbsp;cell activation

Forced expression of the non-coding RNA miR-17∼92 restores activation and function in CD28-deficient CD4+ T cells.

Funder: Horizon 2020 Framework ProgrammeFunder: National Institutes of HealthCD28 provides the prototypical costimulatory signal required for productive T-cell activation. Known molecular consequences of CD28 costimulation are mostly based on studies of protein signaling molecules. The microRNA cluster miR-17∼92 is induced by T cell receptor stimulation and further enhanced by combined CD28 costimulation. We demonstrate that transgenic miR-17∼92 cell-intrinsically largely overcomes defects caused by CD28 deficiency. Combining genetics, transcriptomics, bioinformatics, and biochemical miRNA:mRNA interaction maps we empirically validate miR-17∼92 target genes that include several negative regulators of T cell activation. CD28-deficient T cells exhibit derepressed miR-17∼92 target genes during activation. CRISPR/Cas9-mediated ablation of the miR-17∼92 targets Pten and Nrbp1 in naive CD28-/- CD4+ T cells differentially increases proliferation and expression of the activation markers CD25 and CD44, respectively. Thus, we propose that miR-17∼92 constitutes a central mediator for T cell activation, integrating signals by the TCR and CD28 costimulation by dampening multiple brakes that prevent T cell activation