Search results for "Crown"

Crystal structure of diaqua[5,10,15,20-tetrakis(4-methoxyphenyl)porphyrinato-κ4N]iron(III) diaqua(18-crown-6)potassium bis(trifluoromethanesulfonate)…

2015

In the title compound, [FeIII(C48H36N4O2)(H2O)2][K(C12H24O6)(H2O)2](SO3CF3)2·2C12H24O6, the FeIIIatom is situated on an inversion centre and is octahedrally coordinated by four pyrrole N atoms of the deprotenated 5,10,15,20-tetrakis(4-methoxyphenyl)porphyrinate ligand and two water molecules. The average equatorial Fe—N(pyrrole) bond length [2.043 (6) Å] is consistent with a high-spin (S= 5/2) iron(III) metalloporphyrin derivative. The K+cation, which also lies on an inversion centre, is chelated by the six O atoms of one 18-crown-6 molecule and is additionally coordinated by two water molecules in a distorted hexagonal–bipyramidal geometry. In the crystal, the cations, anions and one non-c…

CCDC 976053: Experimental Crystal Structure Determination

2015

Related Article: L. Ben Haj Hassen, Z. Denden, Y. Rousselin, H. Nasri|2015|Acta Crystallogr.,Sect.E:Cryst.Commun.|71|m215|doi:10.1107/S2056989015021039

Dożynki w Polsce. Od obrzędu do widowiska

2017

Today the traditional beliefs, customs and rites relating to the harvest time are very limited as their contemporary functions and dimension have changed. The authoress is interested in the transformation process of a harvest festival that is typical of the old rural communities. The harvest festival still crowns the labours of farming and is a form of solemn thanksgiving for harvested crops but today's celebration is not accompanied with any magical practices that would bring a good harvest next year. Ritual songs are becoming obsolete and the harvesting women, if any, no longer need any orations addressed to a landlord. The customs of baking bread and making crown-shaped wreaths have surv…

Spectrophotometric evaluation of dental bleaching under orthodontic bracket in enamel and dentin

2013

Aware of the diffusion capacity of bleaching in the dental tissues, many orthodontists are subjecting their patients to dental bleaching during orthodontic treatment for esthetic purposes or to anticipate the exchange of esthetic restorations after the orthodontic treatment. For this purpose specific products have been developed in pre-loaded whitening trays designed to fit over and around brackets and wires, with clinical efficacy proven. Objective: The objective of this study was to evaluate, through spectrophotometric reflectance, the effectiveness of dental blea - ching under orthodontic bracket. Material and methods: Thirty-two bovine incisors crown blocks of 8 mm x 8 mm height lengths…

"Schon lange betrachteten sich hier die 'Barone' als die eigentlichen Herren des Landes". K diskusi o příčinách vzniku Zelenohorské jednoty

2017

This arlicle proposes a new theory explaining why in 1465 the Czech Catholic noblemen rebelled against the King of Bohemia, Jiri of Podebrady. One of the main reasons was the interference of the city of Wrocław (Breslau), which tried to usurp the historical right of the Bohemian nobility to chose the Bohemian king. It also brings back to light the crucial role played in these events by Jośt II of Rosenberg, who was not only a representative of the most powerful noble family in Bohemia, but also the Bishop of Wrocław.

Ion pair recognition by ditopic crown ether based bis-urea and uranyl salophen receptors

2016

Prenatal Brain Damage in Preeclamptic Animal Model Induced by Gestational Nitric Oxide Synthase Inhibition

2010

Cerebral palsy is a major neonatal handicap with unknown aetiology. There is evidence that prenatal brain injury is the leading cause of CP. Severe placental pathology accounts for a high percentage of cases. Several factors predispose to prenatal brain damage but when and how they act is unclear. The aim of this paper was to determine if hypoxia during pregnancy leads to damage in fetal brain and to evaluate the localization of this injury. An animal model of chronic hypoxia produced by chronic administration of a nitric oxide synthase inhibitor (L-NAME) was used to evaluate apoptotic activity in fetal brains and to localize the most sensitive areas. L-NAME reproduces a preeclamptic-like c…

Coronectomy versus surgical removal of the lower third molars with a high risk of injury to the inferior alveolar nerve: a bibliographical review

2015

Background Coronectomy is the surgical removal of the crown of the tooth deliberately leaving part of its roots. This is done with the hope of eliminating the pathology caused, and since the roots are still intact, the integrity of the inferior alveolar nerve is preserved. Objectives The aim is to carry out a systematic review in order to be able to provide results and conclusions with the greatest scientific evidence possible. Material and Methods A literature review is carried out through the following search engines: Pubmed MEDLINE, Scielo, Cochrane library and EMI. The level of evidence criteria from the Agency for Healthcare Research and Quality was applied, and the clinical trials’ le…

Predicting adverse obstetric outcome after early pregnancy events and complications: a review.

2009

BACKGROUND The aim was to evaluate the impact of early pregnancy events and complications as predictors of adverse obstetric outcome. METHODS We conducted a literature review on the impact of first trimester complications in previous and index pregnancies using Medline and Cochrane databases covering the period 1980-2008. RESULTS Clinically relevant associations of adverse outcome in the subsequent pregnancy with an odds ratio (OR) > 2.0 after complications in a previous pregnancy are the risk of perinatal death after a single previous miscarriage, the risk of very preterm delivery (VPTD) after two or more miscarriages, the risk of placenta praevia, premature preterm rupture of membranes, V…

Determination of crown discoloration and fluorescence induced by different medications used in regenerative endodontic procedures: An ex vivo study

2021

Background Crown discoloration is an undesirable side effect of the use of triple antibiotic paste (TAP) in regenerative endodontic procedures (REPs). The aim of this ex vivo study was to assess the potential for tooth discoloration and induction of fluorescence associated with the use of TAP containing either doxycycline (DOX) or clindamycin (CLIN), and of calcium hydroxide (Ca(OH)2), by spectrophotometric analysis and confocal laser scanning microscopy (CLSM). Material and methods A total of forty single-rooted human teeth extracted by therapeutic indication were used. The root canals were enlarged using the step-back technique up to a K #80 file and were randomly divided into four experi…