Search results for "riga"

Irrigants in endodontics: A review

2019

Aim. The purpose of this paper was to review different endodontic irrigants use in endodontics. Background. Many areas inside the canals are inaccessible to mechanical instrumentation, the presence of lateral and accessory canals makes root canal preparation even more difficult. The complete smear layer removal from the root canals depends consequently on both the irrigant solutions and the instrumentation phase. Review consults. Irrigants play a very important role in disinfecting the root canals thus the use of specific solutions has been performed in conjunction with mechanical instrumentation for many years. Combination of several irrigants can increase the capability to penetrate insid…

A distributed agro-hydrological model for irrigation water demand assessment

2008

Abstract The actual irrigation water demand in a district in Sicily (Italy) was assessed by the spatially distributed agro-hydrological model SIMODIS (SImulation and Management of On-Demand Irrigation Systems) . For each element with homogeneous crop and soil conditions, in which the considered area can be divided, the model numerically solves the one-dimensional water flow equation with vegetation parameters derived from Earth Observation data. In SIMODIS, the irrigation scheduling is set by means of two parameters: the threshold value of soil water pressure head in the root zone, h m , and the fraction of soil water deficit to be re-filled, Δ . This study investigated the possibility of i…

2021

AbstractDoxorubicin (DOX) is a common drug in cancer chemotherapy, and its high DNA-binding affinity can be harnessed in preparing DOX-loaded DNA nanostructures for targeted delivery and therapeutics. Although DOX has been widely studied, the existing literature of DOX-loaded DNA-carriers remains limited and incoherent. Here, based on an in-depth spectroscopic analysis, we characterize and optimize the DOX loading into different 2D and 3D scaffolded DNA origami nanostructures (DONs). In our experimental conditions, all DONs show similar DOX binding capacities (one DOX molecule per two to three base pairs), and the binding equilibrium is reached within seconds, remarkably faster than previou…

In vitro study of the apical microleakage with resilon root canal filling using different final endodontic irrigants

2015

Background: Endodontic microleakage or microfiltration refers to the percolation of fluids and micro-organisms at the interface of the obturation material and the walls of the root canal system. The aim of this in vitro study was to compare apical microfiltration of Resilon root canal filling by employing three dif ferent final irrigant solutions. Material and Methods: 128 single-rooted teeth were employed. The crowns were sectioned horizontally at the cemento-enamel junction and instrumented with 5.25% sodium hypochlorite (NaOCl) and 17% EDTA gel to obtain an instrumented 040 apical caliber. An intermediate irrigation was performed with distilled water. The roots were then randomly assigne…

Eröffnungsfeier des Passagierverkehrs in Riga vom neuen Bahnhof "Riga-Glawnaja" (Haupt-Bahnhof) über die neue Düna-Eisenbahnbrücke

1914

Teksts paralēli krievu, vācu un latviešu valodā.

Ueber das Armen Krankenhaus und die Entbindungs Anstalt in Riga

1828

Ice rise in Daugava (14.04.1905)

1905

K. B. Dosa 1905. gada 14. aprīlī fotografētā ledus celšanās Daugavā pie Marjuškas (pie Doles salas) ar aprakstu. K. B. Dos's photographed ice rise in Daugava near marjuska (near Dole Island) on 14 April 1905, with a description. K. B. Doss fotografierte am 14. April 1905 Eisaufsteigung in der Daugava bei Marjuschka (bei Dole Island) mit einer Beschreibung.

Zur Geschichte der öffentlichen Anlagen und Gärten der Stadt Riga

1913

Ausstellung des Rigaschen Gartenbauvereins

1877

Surface debris of canal walls after post space preparation in endodontically treated teeth: A scanning electron microscopic study

2004

Abstract Purpose To evaluate surface cleanliness of root canal walls along post space after endodontic treatment using 2 different irrigant regimens, obturation techniques, and post space preparation for adhesive bonding. Study design Forty teeth, divided into 4 groups, were instrumented, using Ni-Ti rotary files, irrigated with NaOCl or NaOCl + EDTA and obturated with cold lateral condensation (CLC) or warm vertical condensation (WVC) of gutta-percha. After post space preparation, etching, and washing procedure, canal walls were observed using a scanning electron microscope (SEM). Amount of debris, smear layer, sealer/gutta-percha remnants, and visibility of open tubules were rated. Result…