Search results for "Lm"
showing 10 items of 19289 documents
ABC saimes gēnu ekspresija un vēža cilmes šūnu fenotipiskās izpausmes pret doksorubicīnu rezistentā MDA-MB-231 apakšpopulācijā
2018
Rezistence pret citotoksiskiem ķīmijterapijas savienojumiem ir nozīmīga problēma vēža ārstēšanā, kam raksturīga audzēja atjaunošanās un slimības progresēšana. Rezistenci pret ķīmijterapijas savienojumiem var veidot dažādi šūnu mehānismi, no kuriem visplašāk aprakstīta ATF saistošās kasetes (ABC) transportproteīnu pārekspresija. Rezistenci visbiežāk veicina pret ķīmijterapijas savienojumiem rezistentu apakšpopulāciju selekcija. Vēža cilmes šūnām (VCŠ) piemīt spēja izvairīties no ķīmijterapijas ietekmes un atjaunot audzēja šūnu populāciju. Darba mērķis bija noteikt ABC saimes gēnu ekspresiju un raksturot VCŠ raksturīgās pazīmes pret doksorubicīnu rezistentā trīskārši negatīva krūts vēža šūnu …
Hipofīzes adenomu šūnu raksturojums
2018
Hipofīzes adenoma ir populācijā bieži sastopams labdabīgs smadzeņu audzējs. Šobrīd trūkst informācijas par iespējamiem audzēja veidošanās mehānismiem un tā attīstību veicinošām mutācijām. Šajā pētījumā ir apkopoti 10 hipofīzes adenomu pacientu dati, kas iegūti ar molekulārām un šūnu bioloģijas metodēm. No hipofīzes adenomu operāciju materiāla tika iegūtas heterogēnas šūnu kultūras, kas tika raksturotas pēc audzēja un cilmes šūnu marķieriem, ka arī mutāciju spektra, izmantojot imūnfluorescentās krāsošanas, plūsmas citometrijas, vienas šūnas pilna genoma amplifikācijas un eksonu sekvenēšanas metodes. Rezultāti liecina, ka no hipofīzes adenomas paraugiem ir iespējams iegūt dzīvotspējīgas sfēra…
Wage Effects of Firm Size : Evidence from Linked Employer-Employee Panel
2017
This study explores the relationship between wages and firm size using large registered data and different identification strategies. We found that the effect of firm size on wages is negligible when worker and firm characteristics are accounted for. The findings are robust across identification strategies and numerous covariates. The findings are also consistent with the view that coordinated wage-setting systems narrow wage distributions. peerReviewed
Recovery of mobility function and life-space mobility after ischemic stroke: the MOBITEC-Stroke study protocol
2020
Abstract Background Stroke is a major cause of disability and stroke incidence increases with age. Stroke frequently results in permanent limitations of mobility, and, consequently, the need for the help of others in activities of daily living. In order to optimize rehabilitative efforts and their functional outcomes, detailed knowledge of the functional recovery process, regarding mobility, is needed. Objectives of the MOBITEC-Stroke study are: 1.) To characterize mobility, including lower extremity physical function (LEPF) and life space (the geospatial extent of all of a person’s movements), and changes in mobility within the first year after stroke. 2.) To identify and characterize subg…
Karoliinien soturiarvot : kunnian hallitsema maailmankuva Ruotsin valtakunnassa 1700-luvun alussa
2011
The Effect of Electrolytic Solution Composition on the Structure, Corrosion, and Wear Resistance of PEO Coatings on AZ31 Magnesium Alloy
2020
Plasma electrolytic oxidation coatings were prepared in aluminate, phosphate, and silicate-based electrolytic solutions using a soft-sparking regime in a multi-frequency stepped process to compare the structure, corrosion, and wear characteristics of the obtained coatings on AZ31 magnesium alloy. The XRD results indicated that all coatings consist of MgO and MgF2, while specific products such as Mg2SiO4, MgSiO3, Mg2P2O7, and MgAl2O4 were also present in specimens based on the selected solution. Surface morphology of the obtained coatings was strongly affected by the electrolyte composition. Aluminate-containing coating showed volcano-like, nodular particles and craters distributed over the …
Synergistic effect of W incorporation and pulsed current mode on wear and tribocorrosion resistance of coatings grown by plasma electrolytic oxidatio…
2019
Ceramic coatings were grown by plasma electrolytic oxidation on 7075 Al alloy using unipolar and bipolar pulsed current waveforms with 20 and 40% cathodic duty cycles, from a silicate-based bath without and with the addition of Na2WO4. Pancake-like morphology was dominant on the coatings grown by unipolar waveform, while the bipolar waveforms promoted volcano-like morphology, increased the roughness of the coating surface and the formation of more compact layers. The coatings produced using the bipolar waveforms provided higher resistances toward both tribocorrosion and dry sliding conditions, while further improvement was achieved by the presence of tungsten. The coatings produced in tungs…
Effect of Boron Doping on the Wear Behavior of the Growth and Nucleation Surfaces of Micro- and Nanocrystalline Diamond Films
2016
B-doped diamond has become the ultimate material for applications in the field of microelectromechanical systems (MEMS), which require both highly wear resistant and electrically conductive diamond films and microstructures. Despite the extensive research of the tribological properties of undoped diamond, to date there is very limited knowledge of the wear properties of highly B-doped diamond. Therefore, in this work a comprehensive investigation of the wear behavior of highly B-doped diamond is presented. Reciprocating sliding tests are performed on micro- and nanocrystalline diamond (MCD, NCD) films with varying B-doping levels and thicknesses. We demonstrate a linear dependency of the we…
Tribological and Mechanical Properties of the Nanostructured Superlattice Coatings with Respect to Surface Texture
2022
This research is funded by the Latvian Council of Science, project “Carbon-rich self-healing multifunctional nanostructured smart coatings (NSC) for high-tech applications using high-power confined plasma technology for their deposition”, project No. 2019/1-0385.
Music adviser : emotion-driven music recommendation ecosystem
2017
In respect of the big amounts of music available in the web, people met the problem of choice. From another side, practically unlimited resources can bring us new opportunities in the music context. Efficient data management engines which are smart and self managed are in demand nowadays in the music industry to handle music sources amounts of which are coming towards to infinity continuously. This study demonstrates feasibility of the emotional based personalization of music recommendation system. There is still gap between human and artificial intelligence, robotics do not have intuition and emotions which represent critical point of recommendations. Taking into account significant influe…