Methylviologen mediated electrochemical reduction of AgCl - A new route to produce a silica core/Ag shell nanocomposite material in solution

© 2015 Elsevier B.V. All rights reserved. Methylviologen mediated electrochemical reduction of AgCl precipitate to Ag0 in the presence of alkylamino-modified silica nanoparticles (SiO2-NHR) in an aqueous medium was performed. The main products of reduction at potentials of the MV2 +/MV•+ redox couple are spherical SiO2-NHR/Ag core/shell nanoparticles (size range 120-160 nm) in solution

Outer-sphere association of p-sulfonatothiacalix[4]arene and tetrasulfonatomethylated calix[4]resorcinarene with cobalt(III) tris(dipyridyl): the effect on the spectral and electrochemical properties of the latter

According to the 1H NMR and X-ray data, the outer-sphere association of [Co(dipy)3]3+ with cyclophanic anions p-sulfonatothiacalix[4]arene and tetrasulfonatomethylated calix[4]resorcinarene is accompanied by the inclusion of the dipyridyl moiety of the former into the cavities of the cyclophanic anions in aqueous and aqueous-DMSO solutions and in the solid state. The first-step dissociation of p-sulfonatothiacalix[4]arene does not change the inclusion mode, but the increase in DMSO content leads to a shallower inclusion of [Co(dipy)3]3+. The electrochemical property changes of [Co(dipy)3]3+ with both receptors undergoing ion pairing indicate the stabilization of the tris-(dipyridyl) cobalt complexes in lower oxidation states. The effect of the cyclophanic anions on the cyclic voltammograms of [Co(dipy)3]3+ correlates with the efficiency of binding of the latter with tetrasulfonatomethylated calix[4]resorcinarene and p-sulfonatothiacalix[4]arene. © 2005 American Chemical Society [email protected] A. E. Arbuzov Institute of Organic & Physical Chemistry Kazan State University

Влияние ферментозаместительной терапии на обструкцию верхних дыхательных путей у детей с мукополисахаридозами: ретроспективное когортное исследование

Background. Data on the efficacy of enzyme replacement therapy (ERT) in relation to the pathology of ENT organs and respiratory performance in sleep in children with mucopolysaccharidosis (MPS) is poorly presented in the literature. Our aim was to assess the effect of ERT on the upper respiratory tract in children with MPS. Methods. According to the case histories, we studied treatment results of children with MPS type I and II who received ERT in the Research Center of Children’s Health from January 2007 to November 2016. The severity of upper airway obstruction and its change during ERT was assessed according to indices of apnea-hypopnea and desaturation (SpO2), average/minimal SpO2, duration of SpO2 episodes < 90%, and hypertrophy degree of palatine tonsils and adenoids. Results. The severity of the obstructive sleep apnea syndrome did not progress in children (n = 15) with MPS against the background of ERT with a median duration of 38 (23; 48) months: initially, the apnea-hypopnea index was 3 (1.3; 7.7), while the repeated study — 2.6 (0.9; 13.5) (p = 0.507). There was also no statistically significant change in cardiorespiratory monitoring values. Conclusion. Long-term ERT in children with MPS type I and II interferes with the progression of airway obstruction.Обоснование. Данные об эффективности ферментозаместительной терапии (ФЗТ) в отношении патологии ЛОР- органов и показателей дыхания во сне у детей с мукополисахаридозом (МПС) в литературе представлены скудно.Цель исследования — оценить влияние ФЗТ на состояние верхних дыхательных путей у детей с МПС.Методы. По историям болезни изучали результаты лечения детей с МПС I и II типов, получавших ФЗТ в Научном центре здоровья детей (ныне ФГАУ «НМИЦ здоровья детей» Минздрава России) с января 2007 по ноябрь 2016 г. Выраженность обструкции верхних дыхательных путей и ее изменение на фоне ФЗТ оценивали по индексам апноэ-гипопноэ и десатурации (SpO2), средней/минимальной SpO2, продолжительности эпизодов SpO2< 90% и степени гипертрофии небных миндалин и аденоидов.Результаты. У детей (n=15) с МПС на фоне ФЗТ продолжительностью (медиана) 38 (23; 48) мес тяжесть синдрома обструктивного апноэ сна не прогрессировала: исходно индекс апноэ-гипопноэ составил 3 (1,3; 7,7), при повторном исследовании — 2,6 (0,9; 13,5) (р=0,507). Также не установлено статистически значимого изменения показателей кардиореспираторного мониторинга.Заключение. Длительная ФЗТ у детей с МПС I и II типов препятствует прогрессированию обструкции дыхательных путей.КОНФЛИКТ ИНТЕРЕСОВ Л.С. Намазова-Баранова — получение исследовательских грантов от фармацевтических компаний Пьер Фабр, Genzyme Europe B. V., ООО «Астра зенека Фармасьютикалз», Gilead / PRA «Фармасьютикал Рисерч Ассошиэйтс СиАйЭс», Bionorica, Teva Branded Pharmaceutical products R&D, Inc / ООО «ППД Девелопмент (Смоленск)», «Сталлержен С. А.» / «Квинтайлс ГезмбХ» (Австрия). Л.М. Кузенкова, А.К. Геворкян, Т.В. Подклетнова, Н.Д. Вашакмадзе читают лекции для компаний «Санофи Джензайм», «Шайер», «Биомарин». Остальные авторы подтвердили отсутствие конфликта интересов, о котором необходимо сообщить

Methylviologen mediated electrochemical reduction of AgCl - A new route to produce a silica core/Ag shell nanocomposite material in solution

© 2015 Elsevier B.V. All rights reserved. Methylviologen mediated electrochemical reduction of AgCl precipitate to Ag0 in the presence of alkylamino-modified silica nanoparticles (SiO2-NHR) in an aqueous medium was performed. The main products of reduction at potentials of the MV2 +/MV•+ redox couple are spherical SiO2-NHR/Ag core/shell nanoparticles (size range 120-160 nm) in solution

Methylviologen mediated electrochemical reduction of AgCl - A new route to produce a silica core/Ag shell nanocomposite material in solution

© 2015 Elsevier B.V. All rights reserved. Methylviologen mediated electrochemical reduction of AgCl precipitate to Ag0 in the presence of alkylamino-modified silica nanoparticles (SiO2-NHR) in an aqueous medium was performed. The main products of reduction at potentials of the MV2 +/MV•+ redox couple are spherical SiO2-NHR/Ag core/shell nanoparticles (size range 120-160 nm) in solution

Methylviologen mediated electrochemical reduction of AgCl - A new route to produce a silica core/Ag shell nanocomposite material in solution

© 2015 Elsevier B.V. All rights reserved. Methylviologen mediated electrochemical reduction of AgCl precipitate to Ag0 in the presence of alkylamino-modified silica nanoparticles (SiO2-NHR) in an aqueous medium was performed. The main products of reduction at potentials of the MV2 +/MV•+ redox couple are spherical SiO2-NHR/Ag core/shell nanoparticles (size range 120-160 nm) in solution

New 2,2'-bipyridine and 1,10-phenanthroline based nickel(II) phosphates

© 2019, © 2019 Taylor & Francis Group, LLC. The reactivity of phosphoric acid (H3PO4) toward 2,2'-bipyridine (bpy) and 1,10-phenanthroline (phen) nickel dibromide complexes [NiBr2(bpy)2] and [NiBr2(phen)2] has been investigated. It was found that this interaction leads to new nickel phosphate complexes [Ni(HPO4)(bpy)2] and [Ni(HPO4)(phen)2]. X-ray crystal structure analysis of the obtained complexes indicates that the nickel ions have a distorted octahedral coordination and doubly bridged by two oxygen atoms of the phosphate moiety

Outer-sphere association of p-sulfonatothiacalix[4]arene and tetrasulfonatomethylated calix[4]resorcinarene with cobalt(III) tris(dipyridyl): the effect on the spectral and electrochemical properties of the latter

According to the 1H NMR and X-ray data, the outer-sphere association of [Co(dipy)3]3+ with cyclophanic anions p-sulfonatothiacalix[4]arene and tetrasulfonatomethylated calix[4]resorcinarene is accompanied by the inclusion of the dipyridyl moiety of the former into the cavities of the cyclophanic anions in aqueous and aqueous-DMSO solutions and in the solid state. The first-step dissociation of p-sulfonatothiacalix[4]arene does not change the inclusion mode, but the increase in DMSO content leads to a shallower inclusion of [Co(dipy)3]3+. The electrochemical property changes of [Co(dipy)3]3+ with both receptors undergoing ion pairing indicate the stabilization of the tris-(dipyridyl) cobalt complexes in lower oxidation states. The effect of the cyclophanic anions on the cyclic voltammograms of [Co(dipy)3]3+ correlates with the efficiency of binding of the latter with tetrasulfonatomethylated calix[4]resorcinarene and p-sulfonatothiacalix[4]arene. © 2005 American Chemical Society [email protected] A. E. Arbuzov Institute of Organic & Physical Chemistry Kazan State University

New 2,2'-bipyridine and 1,10-phenanthroline based nickel(II) phosphates

© 2019, © 2019 Taylor & Francis Group, LLC. The reactivity of phosphoric acid (H3PO4) toward 2,2'-bipyridine (bpy) and 1,10-phenanthroline (phen) nickel dibromide complexes [NiBr2(bpy)2] and [NiBr2(phen)2] has been investigated. It was found that this interaction leads to new nickel phosphate complexes [Ni(HPO4)(bpy)2] and [Ni(HPO4)(phen)2]. X-ray crystal structure analysis of the obtained complexes indicates that the nickel ions have a distorted octahedral coordination and doubly bridged by two oxygen atoms of the phosphate moiety

Outer-sphere association of p-sulfonatothiacalix[4]arene and tetrasulfonatomethylated calix[4]resorcinarene with cobalt(III) tris(dipyridyl): the effect on the spectral and electrochemical properties of the latter

According to the 1H NMR and X-ray data, the outer-sphere association of [Co(dipy)3]3+ with cyclophanic anions p-sulfonatothiacalix[4]arene and tetrasulfonatomethylated calix[4]resorcinarene is accompanied by the inclusion of the dipyridyl moiety of the former into the cavities of the cyclophanic anions in aqueous and aqueous-DMSO solutions and in the solid state. The first-step dissociation of p-sulfonatothiacalix[4]arene does not change the inclusion mode, but the increase in DMSO content leads to a shallower inclusion of [Co(dipy)3]3+. The electrochemical property changes of [Co(dipy)3]3+ with both receptors undergoing ion pairing indicate the stabilization of the tris-(dipyridyl) cobalt complexes in lower oxidation states. The effect of the cyclophanic anions on the cyclic voltammograms of [Co(dipy)3]3+ correlates with the efficiency of binding of the latter with tetrasulfonatomethylated calix[4]resorcinarene and p-sulfonatothiacalix[4]arene. © 2005 American Chemical Society [email protected] A. E. Arbuzov Institute of Organic & Physical Chemistry Kazan State University