Disilyl dithiophosphonates in the synthesis of open chain and cyclic organothiophosphorus compounds

O-(Trimethylsiloxy)alkyl S-trimethylsilyl aryldithiophosphonates 7a-d were obtained by the reaction of 2,4-diaryl-1,3,2,4-dithiadiphosphetane-2,4- disulfides 5a,b with disilyl derivatives of glycols 6a,c and salicyl alcohol 6b. The reactions of mixed O,S-bis(trimethylsilyl) 2,4-di(3,5-di-tert-butyl-4- hydroxyphenyl)dithiophosphonate 1 and S-silyl aryldithiophosphonates 7a,b with S,S-diethyldithiodiphenylgermane 2, dichlorodiphenylgermane 8a, and dichlorodiphenylstannane 8b were studied. The structure of hexaphenyl-2,4,6,1,3, 5-trithiatrigerminane 11 was established by X-ray single crystal diffraction. © 2004 Wiley Periodicals, Inc

Glueballs and the Pomeron

Glueballs are considered to be bound states of constituent gluons. Relativistic wave equation for two massive gluons interacting by the funnel-type potential is analyzed. Using two exact asymptotic solutions of the equation, we derive an interpolating mass formula and calculate glueball masses in agreement with the lattice data. We obtain the complex non-linear Pomeron trajectory, $\alpha_P(t)$, in the whole region of $t$. The real part of the trajectory corresponds to the soft Pomeron, parameters of which are found from the fit of recent HERA data.Comment: 6 pages, 1 figure; The X international school-seminar on the actual problems of microword physics Gomel (Belarus), July 15-16, 200

Hadronic Regge Trajectories: Problems and Approaches

We scrutinized hadronic Regge trajectories in a framework of two different models --- string and potential. Our results are compared with broad spectrum of existing theoretical quark models and all experimental data from PDG98. It was recognized that Regge trajectories for mesons and baryons are not straight and parallel lines in general in the current resonance region both experimentally and theoretically, but very often have appreciable curvature, which is flavor-dependent. For a set of baryon Regge trajectories this fact is well described in the considered potential model. The standard string models predict linear trajectories at high angular momenta J with some form of nonlinearity at low J.Comment: 15 pages, 9 figures, LaTe

Vilnius Declaration on chronic respiratory diseases : multisectoral care pathways embedding guided self-management, mHealth and air pollution in chronic respiratory diseases

Correction: Volume: 10 Issue: 1 Article Number: 49 DOI: 10.1186/s13601-020-00357-4 Published: DEC 17 2020Background: Over 1 billion people suffer from chronic respiratory diseases such as asthma, COPD, rhinitis and rhinosinusitis. They cause an enormous burden and are considered as major non-communicable diseases. Many patients are still uncontrolled and the cost of inaction is unacceptable. A meeting was held in Vilnius, Lithuania (March 23, 2018) under the patronage of the Ministry of Health and several scientific societies to propose multisectoral care pathways embedding guided self-management, mHealth and air pollution in selected chronic respiratory diseases (rhinitis, chronic rhinosinusitis, asthma and COPD). The meeting resulted in the Vilnius Declaration that was developed by the participants of the EU Summit on chronic respiratory diseases under the leadership of Euforea. Conclusion: The Vilnius Declaration represents an important step for the fight against air pollution in chronic respiratory diseases globally and has a clear strategic relevance with regard to the EU Health Strategy as it will bring added value to the existing public health knowledge.Peer reviewe

НАУЧНЫЙ ПРАКТИКУМ ДЛЯ СТУДЕНТОВ ПО СПЕЦИАЛЬНОСТИ «МЕДИЦИНСКАЯ БИОФИЗИКА»

This article focuses on specialized scientific Practicum organized on April 14s 2016 by the Laboratory of biophysics of cells membranes in critical illness of V. A. Negovsky Research Institute of General Reanimatology for students enrolled in the specialty «Medical Biophysics» at the I. M. Sechenov First Moscow State Medical University. During the study students had mastered a number of techniques: atomic force microscopy, calibrated electroporation, spectrophotometry. Students familiarized with the methodology of scientific experiment and mathematical treatment of the results.Статья посвящена специализированному научному практикуму, организованному на базе лаборатории «Биофизики мембран клеток при критических состояниях» НИИ общей реаниматологи им. В. А. Неговского для студентов, обучающихся по специальности «Медицинская биофизика» в Первом МГМУ им. И. М. Сеченова. В ходе работы студентами был освоен ряд методик: атомная силовая микроскопия, калиброванная электропорация, спектрофотометрия. Студенты ознакомились с методологией научного эксперимента и математической обработкой полученных результатов

Synthesis and thermal stability of S-trimethylsilyl esters of tetracoordinated phosphorus amidothioacids

S-(Diethylamino)dimethylsilyl bis(diethylamido)dithiophosphate 3 was obtained by the reaction of tetraphosphorus decasulfide 1 with bis(diethylamino)dimethylsilane 2a. The reactions of Lawesson's reagent 5 with 2a and the alkyl homologues of Davy's reagent 8a,b with trimethyl(diethylamino) silane 6 were studied. On the basis of these reactions, methods of synthesizing S-(diethylamino)dimethylsilyl or S-(diethylamino)-diphenylsilyl 4-methoxyphenyl (diethylamido)dithiophosphonates 7a and 7b and S-trimethylsilyl S-alkyl(diethylamido)tnthiophosphates 9a,b are described. The optimal reaction conditions and thermal stability of S-trimethylsilyl S-ethyl(diethylamido) trithiophosphate 9a were defined by differential thermal analyses. Compound 9a have been decomposed to form 2,4-bis(diethylamido)-1,3,2,4-dithiadiphosphetane- 2,4-disulfide 10 which structure was established by X-ray single crystal diffraction. © 2006 Wiley Periodicals, Inc

Synthesis and thermal stability of S-trimethylsilyl esters of tetracoordinated phosphorus amidothioacids

S-(Diethylamino)dimethylsilyl bis(diethylamido)dithiophosphate 3 was obtained by the reaction of tetraphosphorus decasulfide 1 with bis(diethylamino)dimethylsilane 2a. The reactions of Lawesson's reagent 5 with 2a and the alkyl homologues of Davy's reagent 8a,b with trimethyl(diethylamino) silane 6 were studied. On the basis of these reactions, methods of synthesizing S-(diethylamino)dimethylsilyl or S-(diethylamino)-diphenylsilyl 4-methoxyphenyl (diethylamido)dithiophosphonates 7a and 7b and S-trimethylsilyl S-alkyl(diethylamido)tnthiophosphates 9a,b are described. The optimal reaction conditions and thermal stability of S-trimethylsilyl S-ethyl(diethylamido) trithiophosphate 9a were defined by differential thermal analyses. Compound 9a have been decomposed to form 2,4-bis(diethylamido)-1,3,2,4-dithiadiphosphetane- 2,4-disulfide 10 which structure was established by X-ray single crystal diffraction. © 2006 Wiley Periodicals, Inc

Disilyl dithiophosphonates in the synthesis of open chain and cyclic organothiophosphorus compounds

O-(Trimethylsiloxy)alkyl S-trimethylsilyl aryldithiophosphonates 7a-d were obtained by the reaction of 2,4-diaryl-1,3,2,4-dithiadiphosphetane-2,4- disulfides 5a,b with disilyl derivatives of glycols 6a,c and salicyl alcohol 6b. The reactions of mixed O,S-bis(trimethylsilyl) 2,4-di(3,5-di-tert-butyl-4- hydroxyphenyl)dithiophosphonate 1 and S-silyl aryldithiophosphonates 7a,b with S,S-diethyldithiodiphenylgermane 2, dichlorodiphenylgermane 8a, and dichlorodiphenylstannane 8b were studied. The structure of hexaphenyl-2,4,6,1,3, 5-trithiatrigerminane 11 was established by X-ray single crystal diffraction. © 2004 Wiley Periodicals, Inc

Disilyl dithiophosphonates in the synthesis of open chain and cyclic organothiophosphorus compounds

O-(Trimethylsiloxy)alkyl S-trimethylsilyl aryldithiophosphonates 7a-d were obtained by the reaction of 2,4-diaryl-1,3,2,4-dithiadiphosphetane-2,4- disulfides 5a,b with disilyl derivatives of glycols 6a,c and salicyl alcohol 6b. The reactions of mixed O,S-bis(trimethylsilyl) 2,4-di(3,5-di-tert-butyl-4- hydroxyphenyl)dithiophosphonate 1 and S-silyl aryldithiophosphonates 7a,b with S,S-diethyldithiodiphenylgermane 2, dichlorodiphenylgermane 8a, and dichlorodiphenylstannane 8b were studied. The structure of hexaphenyl-2,4,6,1,3, 5-trithiatrigerminane 11 was established by X-ray single crystal diffraction. © 2004 Wiley Periodicals, Inc

Disilyl dithiophosphonates in the synthesis of open chain and cyclic organothiophosphorus compounds

O-(Trimethylsiloxy)alkyl S-trimethylsilyl aryldithiophosphonates 7a-d were obtained by the reaction of 2,4-diaryl-1,3,2,4-dithiadiphosphetane-2,4- disulfides 5a,b with disilyl derivatives of glycols 6a,c and salicyl alcohol 6b. The reactions of mixed O,S-bis(trimethylsilyl) 2,4-di(3,5-di-tert-butyl-4- hydroxyphenyl)dithiophosphonate 1 and S-silyl aryldithiophosphonates 7a,b with S,S-diethyldithiodiphenylgermane 2, dichlorodiphenylgermane 8a, and dichlorodiphenylstannane 8b were studied. The structure of hexaphenyl-2,4,6,1,3, 5-trithiatrigerminane 11 was established by X-ray single crystal diffraction. © 2004 Wiley Periodicals, Inc