Search results for "riga"

Applications of DNA self-assembled structures in nanoelectronics and plasmonics

2018

In this thesis, the potential applications of DNA self-assembled structures were explored in both nanoelectronics and plasmonics. The works can be divided into two parts: electrical characterization of unmodified multilayered DNA origami and DNA-gold-nanoparticle conjugates after they were trapped between gold nanoelectrodes by dielectrophoresis, and the development of a novel fabrication method using DNA origami as a template for smooth, high resolution metallic nanostructures as well as optical characterization of them. One of the biggest challenges in self-assembled nanoelectronic devices is to connect them to macroscopic circuits. Dielectrophoretic (DEP) trapping has been used extensivel…

DNA-based applications in molecular electronics

2011

This thesis is mainly focused on DNA molecules and especially on self-assembled DNA constructs and their potential applications in nanotechnology and molecular electronics. In the field of molecular electronics the conductivity of DNA is a crucial - yet open - question, and it is of great concern, since DNA is a very promising molecule in a context of bottom-up based nanodevices due to its superior selfassembly characteristics. A key tool in all the experiments presented in this thesis is a dielectrophoretic trapping technique, which was exploited in spatial manipulation of individualDNA molecules, DNA constructs and also semiconducting quantum dots. In the case of DNA, the technique provid…

Komunikācijas problēma Eiropas feministiskajā filozofijā: L. Irigaraja, H. Siksū

2015

Maģistra darbā “Komunikācijas problēma Eiropas feministiskajā filosofijā: L.Irigaraja, H.Siksū” analizēti divu nozīmīgu feministisku domātāju – L.Irigarajas un H.Siksū uzskati, tiecoties caur komunikācijas problēmas prizmu atspoguļot diferences feminisma pretenzijas uz alternatīvas simboliskās kārtības un divu dzimumu ekonomijas izveidi. Izmantojot tekstu salīdzinošo analīzi, iezīmēti diferences feminisma, fenomenoloģijas, psihoanalīzes un poststrukturālisma diskursu krustpunkti.

Tertium datur: la differenza e l’indifferenziato in Irigaray

2006

Identitāte un citādība

2012

Grāmatā apkopoti latviešu filozofes un tulkotājas Ievas Lapinskas (1974-2010) darbi, tostarp līdz šim nepublicētais promocijas darba "Attiecību ar citādo izpratne mūsdienu filozofijā: Emanuēls Levins un Lisa Irigaraja" manuskripts, kā arī pētnieciskie un populārzinātniskie raksti par dažādiem kontinentālās filozofijas un feminisma jautājumiem, un tulkotie fragmenti no Anrī Bergsona, Paula Jureviča, Rolāna Barta un Emanuēla Levina tekstiem. Pētniece Ieva Lapinska aizgāja mūzībā 2010.gada 11.aprīlī. Viņas kolēģi LU Filozofijas un socioloģijas institūtā sakārtoja un izdeva šo grāmatu viņas piemiņai, augstu novērtējot Ievas devumu mūsdienu franču filozofijas, kultūras vērtību, identitātes un ci…

Intra-urban residential differentiation in the post-Soviet city: the case of Riga, Latvia

2014

Cities in many Central and Eastern European (CEE) countries have transformed rapidly since the political and socio-economic restructuring started in the early 1990s. Economi reforms, growing income inequalities, changes in housing system and selective residential mobility are resulting in increasing socio-spatial differentiation among urban neighbourhoods also in Riga. In addition, litt le is known about the ethnic dimension of intra-urban residential differentiation, despite the existence of sizeable minority populations. The focus on ethnicity is important, since Riga is the only capital city in the Baltic States where the ethnic majority is outnumbered by the non-Latvian minority. This p…

Response to salinity stress of Rhizobium leguminosarum bv. viciae strains in the presence of different legume host plants

2011

We investigated the effect of residual salts from the previous summer’s irrigation on two non-irrigated cover crops—broad bean and common vetch—and on their rhizobial symbiontics. Before sowing, seeds were inoculated with a salt-tolerant strain and a salt-sensitive strain of Rhizobium leguminosarum biovar viciae. An increase in the electrical conductivity of the saturated-soil extract from 2.0 dS m−1 to 6.0 dS m−1 caused a severe reduction of broad bean biomass, while growth of common vetch was almost unaffected by the salinity level. Our results clearly indicate that common vetch as a cover crop may increase the availability of nitrogen in soil more than broad bean also in saline environme…

Effetto inibente dell'olio essenziale di origano nei confronti di Verticillium dahliae Kleb. agente di una tracheomicosi del pomodoro.

2004

Nanodevices by DNA based gold nanostructures

2017

In this thesis DNA based structures were utilized to create gold nanostructures for nanosensing and nanoelectronic applications. In the past, both of these fields have been dominated by the conventional lithography methods, e.g., electron beam lithography and UV-lithography, but more recently scaling down the components by these techniques has become increasingly more complex and costly. Especially in the micro- and nanoelectronics, the increase in the component density and thus computational power would require fabrication of sub-10-nm components, which is challenging for the top-down approaches. Aforementioned developments have led researchers to seek alternative methods to fabricate these…

Reconfigurable DNA Origami Nanocapsule for pH-Controlled Encapsulation and Display of Cargo

2019

DNA nanotechnology provides a toolbox for creating custom and precise nanostructures with nanometer-level accuracy. These nano-objects are often static by nature and serve as versatile templates for assembling various molecular components in a user-defined way. In addition to the static structures, the intrinsic programmability of DNA nanostructures allows the design of dynamic devices that can perform predefined tasks when triggered with external stimuli, such as drug delivery vehicles whose cargo display or release can be triggered with a specified physical or chemical cue in the biological environment. Here, we present a DNA origami nanocapsule that can be loaded with cargo and reversibl…