Search results for "SEP"
showing 10 items of 2642 documents
Efficient selection of silenced primary cells by flow cytometry
2007
Background: RNA interference has emerged as a new and potent tool to knockdown the expression of target genes and to investigate their functions. For short time experiments with mammalian cell lines, RNA interference is typically induced by transfecting small interfering RNAs (siRNAs). Primary cells constitute important experimental systems in many studies because of their similarity to their in vivo counterparts; however, transfection of these cells has been found to be difficult. As a consequence, RNA interference of primary cells may result in mixed phenotypes because of the simultaneous presence in the same preparation of transfected and nontransfected cells. This may be particularly in…
Emotional separation and detachment as two distinct dimensions of parent--adolescent relationships
2011
The study examined adolescents’ emotional separation and detachment from parents, analyzing their relations with connectedness and agency, with some aspects of self—other boundary regulation and with problem behavior. The participants were 331 Italian adolescents, aged from 16 to 19 years (mean age = 17.40, SD = 1.14). Separation and detachment were positively related; they were negatively related to connectedness; detachment was also negatively associated to agency. Emotional separation was negatively predicted by empathic concern, perspective-taking and separate self; emotional detachment was negatively predicted by empathic concern and self—other differentiation. Separation negatively p…
“Some Women Are Born Fighters”: Discursive Constructions of a Fighter’s Identity by Female Finnish Judo Athletes
2017
Martial arts and combat sports have been traditionally associated with masculinity, and a range of contradictory meanings have been attached to women’s engagement and experiences. The present study draws on cultural praxis and feminist poststructuralist frameworks to explore how female martial artists are subjectified to dominant cultural discourses surrounding fighting and competition. Interviews with nine female judoka (judo athletes) were gathered in Finland and analyzed using Foucauldian Discourse Analysis (FDA). The FDA revealed that in female judoka talk, judo was constructed as a sport for all, but also as a male domain and a manly sport with fighting and competition as innate mascul…
Float glass colouring by ion exchange
2008
Abstract Back in the Middle Ages, glass artists used to produce yellowish colorations in soda-lime glasses using mixtures that contained silver salts, clay composites and natural oils. The resulting colour was a characteristic pale yellow known as silver-stain. This coloration is mainly caused by the extinction – absorption and, to a lesser extent, scattering – of light occasioned by silver nanoparticles formed inside the glass. This colouring technique comprises a heat treatment divided in two stages: in the first one, an ion exchange between the silver ions in the mixture and the alkali ions in the glass takes place. This process is called nucleation of silver nanoparticles. The second st…
Modification of the Selectivity Properties of Tubular Ceramic Membranes after Alkaline Treatment
2017
International audience; This work focuses on the selectivity modification of ceramic membranes after a mild alkaline treatment. Filtration of pure saltwater solutions was carried out with commercial titania membranes before and after the treatment. After treatment, the rejection of NaF significantly decreased, while the rejection of NaCl and NaBr increased. Additionally, NaI and Na 2 SO 4 remained close to zero. Pore size and electrical charge being almost unchanged, only significant modifications in the dielectric effects can explain this modification of selectivity. Therefore, the surface chemistry and the interaction (nature and magnitude) with the solvent and with the species present in…
Mobile Security with Location-Aware Role-Based Access Control
2012
Published version of an article from the book: Security and privacy in mobile information and communication systems. Also available on SpringerLink: http://dx.doi.org/10.1007/978-3-642-30244-2_15 This paper describes how location-aware Role-Based Access Control (RBAC) can be implemented on top of the Geographically eXtensible Access Control Markup Language (GeoXACML). It furthermore sketches how spatial separation of duty constraints (both static and dynamic) can be implemented using GeoXACML on top of the XACML RBAC profile. The solution uses physical addressing of geographical locations which facilitates easy deployment of authorisation profiles to the mobile device. Location-aware RBAC c…
Determination of organophosphate flame retardants in soil and fish using ultrasound-assisted extraction, solid-phase clean-up, and liquid chromatogra…
2017
A solid–liquid extraction method in combination with high‐performance liquid chromatography and tandem mass spectrometry was developed and optimized for extraction and analysis of organophosphorus flame retardants in soil and fish. Methanol was chosen as the optimum extraction solvent, not only in terms of extraction efficiency, but also for its broader analyte coverage. The subsequent clean‐up by solid‐phase extraction is required to eliminate matrix coextractives and reduce matrix effects. Recoveries of the optimized method were 50–121% for soil and 47–123% for biota, both with high precision (RSDs <12% in soil and <23% in biota). The method limits of detection ranged from 0.06 to 0.20 ng…
Gelchromatographie. 9. Mitt.: Polymethacrylatgele1
1970
Der Einflus der Herstellungsbedingungen auf die gelchromatographischen Eigenschaften von Polymethylmethacrylatgelen, die mit Glykoldimethacrylat vernetzt sind, wurde untersucht. Homogen-vernetzende Copolymerisation fuhrt zu Gelen mit Ausschlusmolekulargewichten bis ca. 6000. Durch Copolymerisation in Gegenwart von Inertkomponenten entstehen heterogene Strukturen. Durch heterogen-vernetzende Copolymerisation konnen Gele mit Ausschlusmolekulargewichten, die formal 1010 und mehr entsprechen, erhalten werden. Die Anderung der Vernetzerkonzentration und des Solvatationsvermogens der Inertkomponente erlaubt es, die Ausschlusmolekulargewichte der Gele in weiten Grenzen zu variieren. Die Polymerisa…
CCDC 2237075: Experimental Crystal Structure Determination
2023
Related Article: Juan P. Mora-Fuentes, Marcos D. Codesal, Marco Reale, Carlos M. Cruz, Vicente G. Jiménez, Alice Sciortino, Marco Cannas, Fabrizio Messina, Victor Blanco, Araceli G. Campaña|2023|Angew.Chem.,Int.Ed.|62||doi:10.1002/anie.202301356
Heat-transfer performance comparison between overlapped and woven spacers for membrane distillation
2016
Sustainable production of fresh water from seawater desalination is a problem of crucial importance nowadays. Recently, some desalination technologies are taking advantage from the coupling with renewable resources. Among emerging technologies, Membrane Distillation (MD) is considered as one of the most promising as it can be easily powered by solar thermal energy or waste-heat. As an emerging technology, efforts are required to optimize MD unit geometry and operating conditions in order to reduce fresh water production specific cost. Temperature polarization phenomenon is a well-known detrimental effect for the MD process. Spacers are traditionally used to enhance mixing and shrink tempera…