Aneurysm of internal carotid artery, which simulated paratonsillary abscess (clinical case)

This article describes a rare case of paratonsillar abscess imitation among the patients with the aneurysm of ICA. The purpose of the study is to describe the methods of this disease diagnosing using the example of a clinical case, to give a general description of this nosology occurrence frequency, and to recommend a detailed approach to the differential diagnosis among this category of patient

Statistics of Neutron Stars at the Stage of Supersonic Propeller

We analyze the statistical distribution of neutron stars at the stage of a supersonic propeller. An important point of our analysis is allowance for the evolution of the angle of inclination of the magnetic axis to the spin axis of the neutron star for the boundary of the transition to the supersonic propeller stage for two models: the model with hindered particle escape from the stellar surface and the model with free particle escape. As a result, we have shown that a consistent allowance for the evolution of the inclination angle in the region of extinct radio pulsars for the two models leads to an increase in the total number of neutron stars at the supersonic propeller stage. This increase stems from he fact that when allowing for the evolution of the inclination angle $\chi$ for neutron stars in the region of extinct radio pulsars and, hence, for the boundary of the transition to the propeller stage, this transition is possible at shorter spin periods (P~5-10 s) than assumed in the standard model.Comment: 15 pages, 6 figures; scale corrected for figures 3-

Efficacy and safety of various brimonidine formulations in the treatment of glaucoma and ocular hypertension

Purpose. To present data on the mechanism of action, efficacy, and side effects of various brimonidine dosage forms in the treatment of glaucoma and ocular hypertension.Material and methods. To perform the review, literature sources were searched through the PubMed and Scopus databases up to and including 2021, using the keywords «brimonidine», «efficacy», «safety», «glaucoma medication». A total of 36 articles related to the topic of the review were selected. The beginning of publications on this topic dates back to 1995.Results. Brimonidine, an alpha2-adrenoceptor agonist, effectively reduces intraocular pressure and can be used as monotherapy, adjuvant and replacement therapy. The effectiveness of brimonidine is similar to that of timolol and prevails over betaxolol but inferior to prostaglandin analogues. The new drug formulation brimonidine-purite 0.15% has a more favorable safety and tolerability profile than the original brimonidine 0.2% while maintaining similar efficacy. However, most patients require two or more hypotensive medications to maintain target IOP. In this context, brimonidine is one of the most appropriate drugs because of its pr oven efficacy when combined with other classes of hypotensive drugs.Conclusion. Brimonidine can be used as monotherapy for glaucoma and ophthalmic hypertension. Experimental and clinical studies have shown a potential neuroprotective effect of brimonidine, which is associated with a direct effect on retinal cells, regardless of the effect of the drug on intraocular pressure

Norms of grammatical categories acquisition by boys and girls at an early age

The article is devoted to the morphological norms of speech development of children at an early age.Статья посвящена морфологическим нормам развития речи детей раннего возраста

Ionophoric properties of a tetra-tetrazole functionalised calix[4]arene

© 2015 Taylor & Francis. The synthesis and characterisation of p-t-butylcalix[4]arene functionalised at the lower rim with four tetrazole moieties is reported. The macrocycle is found to be a poorer ionophore for lanthanoid cations than the bis-tetrazole-substituted analogue. Solution-phase photophysical studies strongly suggested that the cations interacted only weakly with the calixarene ligand. A mixed sodium/triethylammonium salt of the calixarene ligand was crystallised in the presence of lanthanoid cations and structurally characterised. Strong intramolecular interactions are hypothesised to be the cause of the observed behaviour

The role of the ultrasound examination of the brachial plexus in thoracic outlet syndrome

Introduction. Difficulties in determining the compression of the neurovascular bundle with the thoracic outlet syndrome raises the question of finding an accessible and reproducible method for the neuroimaging of the brachial plexus and surrounding tissues.Purpose of the study – to develop an ultrasound diagnostic algorithm using a stress test to determine the level and cause of brachial plexus compression in comparison with the results of a clinical assessment.Materials and methods. 111 patients with verified compression of the brachial plexus at the level of the interstitial (65.7 %) and bone-clavicular space (21.6 %), as well as the tendon of the pectoralis minor muscle (12.6 %) were examined. The study protocol including the Adson ultrasound stress test, the assessment of the lower trunk in the interstitial space, and the test with ultrasound evaluation of the axillary artery at the level of the tendon of the pectoralis minor muscle with passive abduction of the arm back and up was used.Conclusion. An ultrasound study of the brachial plexus demonstrated informativeness in assessing the level and possible cause of compression, which opens up the possibility of using the method in routine neurological practice

Structural and Luminescence Properties of Silica-Based Hybrids Containing New Silylated-Diketonato Europium(III) Complex

A new betadiketonate ligand displaying a trimethoxysilyl group as grafting function and a diketone moiety as complexing site (TTA-Si = 4,4,4-trifluoro-2-(3-trimethoxysilyl)propyl)-1-3-butanedione (C4H3S)COCH[(CH2)3Si(OCH3)3]COCF3) and its highly luminescent europium(III) complex [Eu(TTA-Si)3] have been synthesized and fully characterized. Luminescent silica-based hybrids have been prepared as well with this new complex grafted on the surface of dense silica nanoparticles (28 (+/-3 nm) or on mesoporous silica particles. The covalent bonding of Eu(TTA-Si)3 inside the core of uniform silica nanoparticles (40 (+/- 5 nm) was also achieved. Luminescence properties are discussed in relation to the europium chemical environment involved in each of the three hybrids. The general methodology proposed allowed high grafting ratios and overcame chelate release and tendency to agglomeration, and it could be applied to any silica matrix (in the core or at the surface, nanosized or not, dense or mesoporous) and therefore numerous applications such as luminescent markers and luminophors could be foreseen

EQCM study of redox properties of PEDOT/MnO2 composite films in aqueous electrolytes

Electrochemical behavior of poly-3,4-ethylenedioxythiophene composites with manganese dioxide (PEDOT/MnO2) has been investigated by cyclic voltammetry and electrochemical quartz crystal microbalance at various component ratios and in different electrolyte solutions. The electrochemical formation of PEDOT film on the electrode surface and PEDOT/MnO2 composite film during the electrochemical deposition of manganese dioxide into the polymer matrix was gravimetrically monitored. The mass of manganese dioxide deposited into PEDOT at different time of electrodeposition and apparent molar mass values of species involved into mass transfer during redox cycling of PEDOT/MnO2 composites were evaluated. It was found that during the redox cycling of PEDOT/MnO2 composite films with various MnO2 content, the oppositely directed fluxes of counterions (anions and cations) occur, resulting in a change of the slope of linear parts of the Delta f-E plots with changing the mass fraction of MnO2 in the composite film. Rectangular shape of cyclic voltammograms of PEDOT/MnO2 composites with different loadings of manganese dioxide was observed, which is characteristic of the pseudocapacitive behavior of the composite material. Specific capacity values of PEDOT/MnO2 composites obtained from cyclic voltammograms were about 169 F g(-1). The specific capacity, related to the contribution of manganese dioxide component, was about 240 F g(-1)

In-depth exploration of the photophysics of a trinuclear palladium complex

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