Search results for "structural"

Divu valodu salīdzinošā analīze bilingvāli runājošiem: franču un nūfu valodā

2022

Šis darbs sniedz atbildi uz problēmjautājumiem, kas rodas bilingvālajās kopienās visā pasaulē, lai parādītu valodu prakses ietekmi uz runātāja ikdienas dzīvi. Daudzvalodu valstīs, piemēram, Kamerūnā, kur valodu skaits sasniedz 250, bilingvāli runājošie, šajā gadījumā franču-nu'fī valodā runājošie, izjūt savas valodas lietošanas pozitīvu vai negatīvu ietekmi. Minētajā kontekstā bilingvālo prasmju lietošana nepaliek bez ietekmes uz runātāju. Viņi var izjust pozitīvu vai negatīvu kognitīvo ietekmi atkarībā no apgūtajām prasmēm. Ja kompetences līmenis ir ļoti zems, kognitīvai ietekmei ir apvērsuma efekts, ja kompetences līmenis abās valodās ir pietiekošs vai līdzvērtīgs, runātājs izjūt pozitīvu…

Binder design of high RAP content hot and warm asphalt mixture wearing courses

2015

Reclaimed Asphalt Pavement (RAP) has shown great potential for being used in the construction or maintenance of roads. However, RAP is usually downgraded to lower pavement layers and the percentage of RAP used in wearing courses is still moderate (≤30%). The research and results contained in this paper focus on the definition of binder recipes aimed at increasing the percentage of RAP in hot and warm mix asphalt wearing courses. A review of current internationally used blend design methodologies is presented followed by case studies aimed at defining binder recipes for high RAP content asphalt mixture wearing courses to be further used for mix design and production in asphalt plants. Binder…

Coupling between criticality and gelation in "sticky" spheres: a structural analysis.

2018

We combine experiments and simulations to study the link between criticality and gelation in sticky spheres. We employ confocal microscopy to image colloid-polymer mixtures and Monte Carlo simulations of the square-well (SW) potential as a reference model. To this end, we map our experimental samples onto the SW model. We find an excellent structural agreement between experiments and simulations, both for locally favored structures at the single particle level and large-scale fluctuations at criticality. We follow in detail the rapid structural change in the critical fluid when approaching the gas-liquid binodal and highlight the role of critical density fluctuations for this structural cro…

Photoluminescent and Slow Magnetic Relaxation Studies on Lanthanide(III)-2,5-pyrazinedicarboxylate Frameworks

2017

In the series described in this work, the hydrothermal synthesis led to oxidation of the 5-methyl-pyrazinecarboxylate anion to the 2,5-pyrazinedicarboxylate dianion (2,5-pzdc) allowing the preparation of three-dimensional (3D) lanthanide(III) organic frameworks of formula {[Ln2(2,5-pzdc)3(H2O)4]·6H2O}n [Ln = Ce (1), Pr (2), Nd (3), and Eu (4)] and {[Er2(2,5-pzdc)3(H2O)4]·5H2O}n (5). Single-crystal X-ray diffraction on 1–5 reveals that they crystallize in the triclinic system, P1 space group with the series 1–4 being isostructural. The crystal structure of the five compounds are 3D with the lanthanide(III) ions linked through 2,5-pzdc2– dianions acting as two- and fourfold connectors, buildi…

The coffee-house: Upcycling spent coffee grounds for the production of green geopolymeric architectural energy-saving products

2023

This study investigates a possible alternative reuse of spent coffee grounds (SCG), the major residue of the brewing process, to manufacture green geopolymeric materials for innovative building applications in energy-saving construction, in line with the European Green Deal towards zero-energy building. Specimens were prepared by a combination of biomass fly ash from the Kraft paper-pulp process, as raw material (70 wt%), and SCG (up to 17.5 %), as filler. The high amount of reused bio-wastes makes the material fit the requirements for the Minimum Environmental Criteria (MEC) certification, in light of the Circular Economy (CE) approach. Sustainability is also boosted by the manufacturing p…

Biological Activity of the phenylethanol and its derivatives. Influence on isolated DNA nucleotidyltransferase and DNAase.

1970

High-molecular-weight deoxyribonuclease fromVerongia aerophoba

1969

Corrigendum to “External conditions inversely change the RNA polymerase II elongation rate and density in yeast” [Biochim. Biophys. Acta 1829/11 (201…

2017

Analysis of the structural quality of the CASD-NMR 2013 entries

2015

We performed a comprehensive structure validation of both automated and manually generated structures of the 10 targets of the CASD-NMR-2013 effort. We established that automated structure determination protocols are capable of reliably producing structures of comparable accuracy and quality to those generated by a skilled researcher, at least for small, single domain proteins such as the ten targets tested. The most robust results appear to be obtained when NOESY peak lists are used either as the primary input data or to augment chemical shift data without the need to manually filter such lists. A detailed analysis of the long-range NOE restraints generated by the different programs from t…

Biocompatibility, hemocompatibility and antimicrobial properties of xyloglucan-based hydrogel film for wound healing application.

2018

Crosslinked xyloglucan-poly(vinyl alcohol) based hydrogel films are interesting materials for wound healing applications. This work focuses on the hydrolytic degradation and consequent morphological modification of a XG-PVA film and on its interaction with cells, blood, bacteria. Biocompatibility of the film was assessed in vitro by investigating different aspects, such as cell viability, oxidative stress level, mitochondrial dysfunction and specific stress biomarkers. Partial adhesiveness was demonstrated by performing different attaching assays and phalloidin staining. Hemocompatibility of XG-PVA film after interaction with blood was evaluated by using a multi-parametric approach, includi…