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69 results on '"Belousov, Y."'

1. Explicit Formulas for the Alexander Polynomial of Pretzel Knots

Author

Belousov, Y.

Subjects
Mathematics - Geometric Topology, 57K10, 57K14
Abstract

We provide explicit formulas for the Alexander polynomial of Pretzel knots and establish several immediate corollaries, including the characterization of Pretzel knots with a trivial Alexander polynomial., Comment: 7 pages, 2 figures

Published
2025

2. Meander diagrams of virtual knots

Author

Belousov, Y., Chernov, V., Malyutin, A., and Sadykov, R.

Subjects
Mathematics - Geometric Topology
Abstract

For classical knots, there is a concept of (semi)meander diagrams; in this short note we generalize this concept to virtual knots and prove that the classes of meander and semimeander diagrams are universal (this was known for classical knots). We also introduce a new class of invariants for virtual knots -- virtual $k$-arc crossing numbers and we use Manturov projection to show that for all classical knots the virtual $k$-arc crossing number equals to the classical $k$-arc crossing number., Comment: 8 pages, 3 figures

Published
2024

3. Prime Factorization of Meanders

Author

Belousov, Y.

Subjects
Mathematics - Combinatorics
Abstract

In this paper, we introduce a prime factorization of open meanders, articulated through the framework of 2-colored operads. We demonstrate that each open meander can be canonically constructed from building blocks of two types: iterated snakes and irreducible meanders. We find out that iterated snakes allow efficient enumeration, and thus the problem of enumerating meanders reduces to the problem of enumerating irreducible meanders. Additionally, we present some results concerning the asymptotic of meanders of both classes., Comment: 22 pages, 10 figures; v4: full revision, includes arXiv:2107.06837 and arXiv:2206.03453

Published
2021

4. On irreducible meanders growth rate

Author

Belousov, Y. and Malyutin, A.

Subjects
Mathematics - Combinatorics, Mathematics - Geometric Topology
Abstract

In this article, we provide upper and lower bounds for the growth rate of irreducible meanders. The obtained upper bound implies that the proportion of irreducible meanders among all of the prime meanders of order $n$ approaches $0$ as $n$ approaches infinity., Comment: 6 pages, 2 figures; v2: the main object was renamed, minor edits

Published
2021

6. Monometallic Ln

Author

Belousov, Y. A., primary, Kiskin, M. A., additional, Sidoruk, A. V., additional, Varaksina, E. A., additional, Shmelev, M. A., additional, Gogoleva, N. V., additional, Taydakov, I. V., additional, and Eremenko, I. L., additional

Published
2022
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7. Irreducible meanders

Author

Belousov, Y.

Subjects
Physics::Fluid Dynamics, Quantitative Biology::Tissues and Organs, FOS: Mathematics, Mathematics - Combinatorics, Combinatorics (math.CO), Mathematics::Representation Theory, Nonlinear Sciences::Pattern Formation and Solitons, Physics::Atmospheric and Oceanic Physics
Abstract

In this article, we introduce a new geometric decomposition of meanders into prime factors (irreducible meanders). This decomposition makes it possible to express the number of meanders with a fixed number of intersections in terms of the number of irreducible meanders with fewer intersections., preliminary version, 16 pages, 6 figures; v2: numbers in table 1 were corrected; v3: several typos fixed

Published
2021

8. Monometallic Ln3+ and heterometallic Ln3+–Cd2+complexes based on pentafluorophenylacetic acid: efficient control of dimension and luminescent properties†.

Author

Belousov, Y. A., Kiskin, M. A., Sidoruk, A. V., Varaksina, E. A., Shmelev, M. A., Gogoleva, N. V., Taydakov, I. V., and Eremenko, I. L.

Subjects
*COORDINATION polymers, *RARE earth metals, *MOLECULES, *POLYMER structure, *SINGLE crystals, *PHENANTHROLINE, *X-ray diffraction
Abstract

Four new complexes [Ln(pfaa)3(H2O)2] n (Ln = Eu (1), Tb (2)) and [Ln2Cd2(pfaa)10 (phen)2(EtOH)2]·2MeCN (Ln = Eu (3), Tb (4), phen = 1,10-phenanthroline) based on pentaphorphenylacetic acid (Hpfaa) have been prepared and completely investigated. The structures of compounds 1 and 3 were studied by single crystal X-ray diffraction analysis: the isostructural complexes 1 and 2 represent 1D coordination polymer, while the isostructural complexes 3 and 4 are molecular compounds. Complexes 1–4 show strong lanthanide-centred luminescence, since the introduction of phenanthroline leads to a significant increase in the observed lifetime (τ obs) and photoluminescent quantum yield. New complexes of Eu3+ and Tb3+ with pentafluorophenylacetic acid have been studied. During synthesis under hydrothermal conditions, polymer structures are formed, while the introduction of phenanthroline and Cd2+ makes it possible to obtain molecular complexes. A change in the structure leads to significant changes in the luminescent properties. [ABSTRACT FROM AUTHOR]

Published
2022
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9. Monometallic Ln3+ and heterometallic Ln3+–Cd2+complexes based on pentafluorophenylacetic acid: efficient control of dimension and luminescent properties†.

Author

Belousov, Y. A., Kiskin, M. A., Sidoruk, A. V., Varaksina, E. A., Shmelev, M. A., Gogoleva, N. V., Taydakov, I. V., and Eremenko, I. L.

Abstract

Four new complexes [Ln(pfaa)3(H2O)2] n (Ln = Eu (1), Tb (2)) and [Ln2Cd2(pfaa)10 (phen)2(EtOH)2]·2MeCN (Ln = Eu (3), Tb (4), phen = 1,10-phenanthroline) based on pentaphorphenylacetic acid (Hpfaa) have been prepared and completely investigated. The structures of compounds 1 and 3 were studied by single crystal X-ray diffraction analysis: the isostructural complexes 1 and 2 represent 1D coordination polymer, while the isostructural complexes 3 and 4 are molecular compounds. Complexes 1–4 show strong lanthanide-centred luminescence, since the introduction of phenanthroline leads to a significant increase in the observed lifetime (τ obs) and photoluminescent quantum yield. New complexes of Eu3+ and Tb3+ with pentafluorophenylacetic acid have been studied. During synthesis under hydrothermal conditions, polymer structures are formed, while the introduction of phenanthroline and Cd2+ makes it possible to obtain molecular complexes. A change in the structure leads to significant changes in the luminescent properties. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
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12. Single nucleotide polymorphism detection with MGB Eclipse (TM) assays

Author

Afonina, I., Belousov, Y., Metcalf, M., Mills, A. M., Sanders, S., Kutyavin, I., Walburger, D., Gorn, V., Shishkina, I., Adams, D., Ahmadian, M., Dempcy, R., Milesi, D., Reed, M. W., Vorobiev, A., Wald, A., Scarr, N., Yau, E., Nico P.E. Vermeulen, and Molecular and Computational Toxicology

Published
2002

13. Rationale, design, and baseline characteristics in Evaluation of LIXisenatide in Acute Coronary Syndrome, a long-term cardiovascular end point trial of lixisenatide versus placebo

Author

UCL - SSS/IREC/CARD - Pôle de recherche cardiovasculaire, Bentley-Lewis, R., Aguilar, D., Riddle, M.C., Claggett, B., Diaz, R., Dickstein, K., Gerstein, H.C., Johnston, P., Køber, L.V., Lawson, F., Lewis, E.F., Maggioni, A.P., McMurray, J.J.V., Ping, L., Probstfield, J.L., Solomon, S.D., Tardif, J.-C., Wu, Y., Pfeffer, M.A., Barkoudah, E., Brahimi, A., Charytan, D., Finn, P., Flynn, A., Hartley, L.H., Henderson, G., Joseph, J., Odutayo, K., Rajesh, V., Vazir, A., Weinrauch, L., Del Prato, S., Petrie, J., Kaplan, A., Lieberman, P., Zuraw, B.L., O'Reilly, E., Patel, K., Allen, P., Scarpa, A., Schattner, M., Granger, C., Rouleau, J., DeMets, D., Chaturvedi, N., Raccah, D., Aizenberg, D., Alvarez, C., Alvarisqueta, A., Baccaro, C., Bartolacci, I., Bordonava, A., Bustamante Labarta, M., Caccavo, A., Calella, P., Cantero, M., Codutti, R., Commendatore, V., Costamagna, O., Cuello, J., Fernandez, A., Garcia Duran, R., Gomez Vilamajo, O., Gorban De Lapertosa, S., Grinfeld, D., Hermida, S., Lagrutta, M., Leon De La Fuente, R., Licheri, A., Luciardi, H., Mackinnon, I., Maffei, L., Marino, J., Montaña, O., Novaretto, L., Orio, S., Orlandini, A., Oviedo, A., Pérez Manghi, F., Patocchi, C., Ramos, H., Rolandi, F., Saa Zarandon, R., Saavedra, S.S., Schiavi, L., Schygiel, P., Trivi, M., Ulla, M., Urdiales, P., Vallejos, J., Vico, M., Waisman, F., Amerena, J., Paul, V., Sangla, K., Van Gaal, W., Yeap, B., Fasching, P., Pieber, T., Danilova, L., Mitkovskaya, N., Sudzhaeva, S., Mathieu, C., Pouleur, Anne-Catherine, Botelho, R.V., Cerqueira, M.J., Chacra, A., Dos Santos, F., Feitosa, G., Forti, A., Golbert, M., Halpern, A., Hissa, M., Lisboa, H., Moraes, J., Nery, M., Quadros, A., Raduan, R., Reis, G., Ribeiro Filho, F., Rollin, G., Rossi, P., Santos, E., Sgarbi, J., Souza, J., Souza, M.R., Delchev, A., Ivanov, V., Klyuchkova, N., Kyoleyan, M., Levterov, G., Lucheva, M., Raev, D., Shumkova, R., Tokmakova, M., Tzekova, M., Yordanov, V., Bailey, G., Bertrand, O., Bhargava, R., Burton, J., Campeau, J., Dumas, R., Filteau, P., Syan, G., Syan, R., Tsoukas, G., Warnica, J.W., Acuña, S., Araneda, G., Bunster, L., Cobos, L., Corbalán, R., Dussaillant, G., Eggers, G., Florenzano, F., Godoy, G., Huidobro, L.A., Lahsen, R., Lanas, F., Larenas, G., Manriquez, L., Medina, M., Palma, J.C., Perez, L., Potthoff, S., Raffo, C., Reyes, E., Saavedra, V., Sanhueza, P., Sepulveda, P., Solis, C.L., Soto, N., Torres, C., Westerberg, B., Yañez, M., Chen, L., Dong, Y., Du, J., Guo, X., Han, P., Hu, T., Jiang, B., Ke, Y., Li, Z., Lu, J., Ma, C., Peng, Y., Shi, Y., Su, G., Tang, B., Xu, B., Yang, J., Yang, Y., Accini, J.L., Arteaga, J.M., Botero, R., Castillo, G., Coronel, J., Cure, C., Garcia, H., Garcia, L., Gomez, C., Hernandez Triana, E., Hernandez, H., Lopez, M., Lopez, P., Manzur, F., Molina, D., Rodriguez, J., Sanchez Vallejo, G., Yupanqui, H., Bronnum-Schou, J., Kaiser Nielsen, P., Nielsen, H., Rønne, H., Rasmussen, S., Rungby, J., Skagen, K., Thomsen, K.K., Torp-Pedersen, C., Duarte-Vera, Y., Marmol Alvear, R., Peñaherrera-Patiño, C., Assaad, S., Shelbaya, S., Ambos, A., Jakovlev, U., Lubi, M., Märtsin, K., Rosenthal, S., Vides, H., Alanko, J., Korsoff, P., Koski, A.-M., Lahtela, J., Nelimarkka, L., Tuomilehto, J., Cariou, B., Catargi, B., Ducloux, R., Hadjadj, S., Kerlan, V., Malecot, J.-M., Petit, C., Rodier, M., Chumburidze, V., Glonti, S., Lominadze, Z., Todua, F., Contzen, C., Marck, C., Fischer, H., Hagenow, A., Himpel-Bönninghoff, A., Kihm, L., Killat, H., Kleinertz, K., Kosch, C., Kreutzmann, K., Lappo, M., Mertes, B., Piechatzek, R., Prohaska, M., Rinke, A., Schellenberg, D., Toursarkissian, N., Arango, J., Gonzalez, R., Granados, A., Herrera, M., Montenegro, P., Munoz, R., Rodriguez, E., Turcios, E., Villalobos, R., Wyss, F., Hatterjee, S., Chopda, M., Chopra, V., Deshpande, N., Dutta, R., Dwivedi, S., Gandhi, P., Gupta, S.K., Gupta, J.B., Gupta, S., Hiregouder, N., Jha, S., Joshi, A., Khan, N., Kumbla, M., Magdum, M., Murthy, K., Prabhu, M., Sahay, R., Sethuraman, S., Shah, N., Shamanna, P., Singh, K.S., Singh, P., Somasekharan, A., Sreenivasamurthy, L., Supe, P., Adawi, F., Atar, S., Cohen, O., Efrati, S., Karnieli, E., Klainman, E., Minuchin, O., Mosenzon, O., Stern, N., Turgeman, Y., Wainstein, J., Aimaretti, G., Berra, C., Ciardullo, A.V., Consoli, A., Cucinotta, D., Di Marco, S., Giorda, C., Giordano, C., Mannucci, E., Orsi, E., Piatti, P., Pontiroli, A., Ponzani, P., Pozzilli, P., Rivellese, A., Akahori, H., Eki, Y., Fujii, K., Hata, Y., Himeno, H., Hirayama, A., Kishimoto, I., Kobayashi, Y., Miyaoka, H., Niiya, T., Nishi, Y., Nozaki, A., Nunohiro, T., Saito, T., Satoh, Y., Takahashi, A., Takahashi, J., Takase, H., Takase, S., Tsuboko, Y., Tsujimoto, M., Tsujino, M., Tsuzuki, M., Watanabe, S., Yamada, T., Chung, W.J., Rim, S., Jang, H., Kim, U., Chung, C.H., Shin, S.-H., Kim, K., Kim, J., Rha, S., Lee, N.H., Kim, C.-J., Park, K.S., Amolina, I., Ducena, K., Helda, R., Konrade, I., Pirags, V., Sime, I., Sokolova, J., Kakariekiene, V., Kavaliauskiene, R., Petrulioniene, Z., Sakalyte, G., Urboniene, A., Zarankiene, R., Uribe, M., Garcia-Hernandez, P., Garza, J., Vazquez-Garcia, A., Gonzalez, J.G., Escalante, M., Zavala, A., Bayram, E., Hernandez-Muñuzuri, J., Ramos, Lopez, G.A., Lujan, J., Garcia-Soria, M., Velasco-Sanchez, R., Rodriguez, I., Jimenez, S., Galeana, C., Lara, S., Garcia-Castillo, A., Castro, M.G., Aguilar-Orozco, R., Lopez Rosas, E., Vidrio, M., Llamas, G., Stobschinski De Alba, C.A., Carranza-Madrigal, J., Cardosa-Torres, F., Cornel, J.H., Dekkers, P., Frederiks, J., Hermans, W., Lok, D., Meeder, J., Nierop, P., Cooper, J., Lappegård, K.T., Nedrebø, B.G., Castro, E., Gonzalez Castillo, B., Gonzalez, E., Nieto Ortega, R., Andrade, M., Calderon, J., Chavez, C., Correa Flores, R.M., Farfan, J., Lu, L., Luque, E., Manrique, H., Mogrovejo, W., Pariona-Javier, M., Pinto, M., Roldan, Y., Zubiate, C., Dans, A., Gomez, M.H., Panelo, A., Rey, N., Sulit, D.J., Sy, R.A., Timonera, M., Bednarski, J., Bijata-Bronisz, R., Bryniarski, L., Busz-Papiez, B., Czajkowska-Kaczmarek, E., Drzewiecka, A., Dulak, E., Gorska, M., Hamankiewicz, M., Janik, K., Kincel, K., Konieczny, M., Lubinski, A., Olszanecka-Glinianowicz, M., Ponikowski, P., Pulka, G., Rekosz, J., Skudlarski, D., Szymkowiak, K., Wilczewski, P., Bragança, N., Duarte, J., Monteiro, P., Rodrigues, E., Vinhas, M., Adina, P.-M., Avram, R.I., Cif, A., Creteanu, G., Dragomir, D., Ferariu, I.E., Iancu, A.-C., Istratoaie, O., Ivanica, G., Lichiardopol, R., Militaru, C., Minescu, B., Onaca, A., Pintilei, E., Podoleanu, C., Pop, L., Popa, B., Ranetti, A.E., Rosu, D., Tase, A., Tesloianu, D.N., Vinereanu, D., Ageev, F., Akhmedzhanov, N., Barbarash, O., Barbarich, V., Belousov, Y., Berns, S., Bokarev, I., Bolshakova, O., Boyarkin, M., Chumakova, G., Dmitry, P., Fitilev, S., Galyavich, A., Glezer, M., Ivanova, L., Kalashnikov, V., Kalashnikova, M., Karpov, Y., Khaisheva, L., Khalimov, Y., Kobalava, Z., Kosmachova, E., Kostenko, V., Koziolova, N., Kulibaba, E., Lesnov, V., Libov, I., Lyamina, N., Markov, V., Moiseev, V., Molchanova, O., Oleynikov, V., Orlikova, O., Panov, A., Rafalskiy, V., Rodionova, T., Samitin, V., Schokotov, V., Shilkina, N., Shogenov, Z., Shustov, S., Shvarts, Y., Sobolev, K., Stryuk, R., Suplotova, L., Viktorova, I., Vishnevsky, A., Vorokhobina, N., Yakusevich, V., Yakushin, S., Zadionchenko, V., Zalevskaya, A., Zalevsky, G., Zateyshchikova, A., Andjelic Jelic, M., Kocic, R., Komnenovic, S., Lalic, K., Lalic, N., Micic, D., Otasevic, P., Pesic, M., Seferovic, P., Stankovic, G., Arnold, S., Burgess, L., Coetzee, K., Dawood, S., Delport, E., Ebrahim, I., Ellis, G., Ismail, S., Kelbe, D., Naidoo, V., Ntsekhe, M., Sebastian, P.J., Siebert, M., Van Zyl, L., Venter, T., Lonso, E., Antorrena, I., Bodi, V., Botella, M., De La Fuente, J., Delgado, E., Duran Garcia, S., Elorza, J., Enciso, F., Gaztambide, S., Marin, F., Martin, V., Mauricio, D., Soto, A., Vida, M., Boberg, G., Jörneskog, G., Jendle, J., Mathiesen, U., Svensson, K.-A., Torstensson, I., Vasko, P., Moccetti, T., Chiang, C.-E., Chiu, Y.-W., Huang, T.-Y., Lu, C.-H., Pei, D., Shyu, K.-G., Ueng, K.-C., Wang, T.-D., Abid, M., Ben Abdallah, N., Haouala, H., Slimane, H., Zidi, B., Bascil Tutuncu, N., Camsari, A., Delibasi, T., Dinccag, N., Kultursay, H., Oto, A., Sahin, M., Saygili, F., Yigit, Z., Zorkun, C., Karpenko, O., Korpachev, V., Koval, O., Maslyanko, V., Perepelytsya, M., Pertseva, T., Petrosyan, O., Rudenko, L., Sychov, O., Synenko, V., Tseluyko, V., Zhuravleva, L., Al Mahmeed, W., Kaddaha, G.M., Andrews, R., Bain, S., Basu, A., Bhatnagar, D., Bickerton, A., Browne, D., Gibson, M., Hammond, P., Hanna, F., Issa, B., Jaap, A., Joseph, F., Jude, E., Kelly, C., Khan, A., Malik, R., Mukhopadhyay, B., O'Kane, M., Rayman, G., Robinson, A., Rooney, D., Sainsbury, C., Saravanan, P., Shakher, J., Singh, B., Turner, J., Whitelaw, D., Wilding, J., Wiles, P., Adenuga, B., Ahmad, Z., Akinboboye, O., Akright, L., Alappat, P., Alawad, M., Alfonso, T., Alimard, R., Alzohaili, O., Ariani, M., Arora, C., Azad, N., Azzam, S., Benjamin, S., Block, B., Borzadek, E., Breisblatt, W., Bright, T., Byrd, L., Chiou, C., Chochinov, R., Christensen, T., Christofides, E., Cohen, R., Dawood, G., De Souza, J., Dempsey, M., Eagerton, D., East, C., Elder, C., Fernando, R., Fogelfeld, L., Foucauld, J., French, W., Frohnauer, M., Gaffney, M., Gangopadhyay, S., Gogia, H., Gosmanov, A., Greenberg, C., Greenway, F., Hanna, E., Hargrove, J., Harris, A., Harris, B., Hart, T., Herrington, D., Hewitt, M., Howard, D., Izuora, K., Jetty, P., Kapoor, A., Kasper, J.F., Kelehan, S., Kelly, R., Kereiakes, D., Khaira, A., Khan, M., Khan, S., Korban, E., Kosiborod, M., Laguerre, J., Larocque, J., Latif, K., Lester, F., Levin, P., Levine, S., Li, C., Lovell, C., Lupovitch, S., Madu, I.-J., Mahabadi, V., Mahmood, A., Maragos, S., Mariash, C., Martin, P., Mathew, J., May, M., Mayfield, R., McCall, A., Mcdaniel, C., Mcgrew, F., Mckenzie, M., Mefford, I., Mehta, A., Mikdadi, G., Mikhail, M., Monchamp, T., Moore, C., Moran, M., Morrar, N., Mosley, J., Mulford, M., Murray, J., Nakhle, S., Nallasivan, M., Odio, A., Oh, C., Olelewe, S., Palchick, B., Paliwal, Y., Papademetriou, V., Parikh, N., Patel, S., Phillips, L., Pitts, T., Prieto, F., Puttnam, R., Quyyumi, A., Randhawa, P., Rendell, M., Rhie, F., Roberts, J., Robinson, J., Robinson, M., Rubino, J., Ryan, E., Saathoff, S., Sachmechi, I., Saifi, A., Salacata, A., Sanders, R., Sanson, J., Savin, V., Schabauer, A., Schmedtje, J., Schwartz, A., Scott, C., Selagamsetty, M., Shannon, M., Shaw, S., Singal, D., Sjoberg, R., Smith, K., Sofley, C., Sonn, A., Sorof, S., Soroka, E., Spellman, C.W., Steinhoff, J., Suresh, D., Tahir, M., Tanenberg, R., Thawani, H., Thomson, S., Thrasher, J., Trachtenbarg, D., Trotta, M., Tuan, W., Twahirwa, M., Umpierrez, G., Vaid, B., Vance, C., Wang, T., Warner, A., Watson, H., Weber, S., Webster, B., Weindorff, K., Welch, M., Welker, J., White, A., White, L., Williams, M., Wu, W.-C., Wynne, A., Yocono, M., Yuen, K., UCL - SSS/IREC/CARD - Pôle de recherche cardiovasculaire, Bentley-Lewis, R., Aguilar, D., Riddle, M.C., Claggett, B., Diaz, R., Dickstein, K., Gerstein, H.C., Johnston, P., Køber, L.V., Lawson, F., Lewis, E.F., Maggioni, A.P., McMurray, J.J.V., Ping, L., Probstfield, J.L., Solomon, S.D., Tardif, J.-C., Wu, Y., Pfeffer, M.A., Barkoudah, E., Brahimi, A., Charytan, D., Finn, P., Flynn, A., Hartley, L.H., Henderson, G., Joseph, J., Odutayo, K., Rajesh, V., Vazir, A., Weinrauch, L., Del Prato, S., Petrie, J., Kaplan, A., Lieberman, P., Zuraw, B.L., O'Reilly, E., Patel, K., Allen, P., Scarpa, A., Schattner, M., Granger, C., Rouleau, J., DeMets, D., Chaturvedi, N., Raccah, D., Aizenberg, D., Alvarez, C., Alvarisqueta, A., Baccaro, C., Bartolacci, I., Bordonava, A., Bustamante Labarta, M., Caccavo, A., Calella, P., Cantero, M., Codutti, R., Commendatore, V., Costamagna, O., Cuello, J., Fernandez, A., Garcia Duran, R., Gomez Vilamajo, O., Gorban De Lapertosa, S., Grinfeld, D., Hermida, S., Lagrutta, M., Leon De La Fuente, R., Licheri, A., Luciardi, H., Mackinnon, I., Maffei, L., Marino, J., Montaña, O., Novaretto, L., Orio, S., Orlandini, A., Oviedo, A., Pérez Manghi, F., Patocchi, C., Ramos, H., Rolandi, F., Saa Zarandon, R., Saavedra, S.S., Schiavi, L., Schygiel, P., Trivi, M., Ulla, M., Urdiales, P., Vallejos, J., Vico, M., Waisman, F., Amerena, J., Paul, V., Sangla, K., Van Gaal, W., Yeap, B., Fasching, P., Pieber, T., Danilova, L., Mitkovskaya, N., Sudzhaeva, S., Mathieu, C., Pouleur, Anne-Catherine, Botelho, R.V., Cerqueira, M.J., Chacra, A., Dos Santos, F., Feitosa, G., Forti, A., Golbert, M., Halpern, A., Hissa, M., Lisboa, H., Moraes, J., Nery, M., Quadros, A., Raduan, R., Reis, G., Ribeiro Filho, F., Rollin, G., Rossi, P., Santos, E., Sgarbi, J., Souza, J., Souza, M.R., Delchev, A., Ivanov, V., Klyuchkova, N., Kyoleyan, M., Levterov, G., Lucheva, M., Raev, D., Shumkova, R., Tokmakova, M., Tzekova, M., Yordanov, V., Bailey, G., Bertrand, O., Bhargava, R., Burton, J., Campeau, J., Dumas, R., Filteau, P., Syan, G., Syan, R., Tsoukas, G., Warnica, J.W., Acuña, S., Araneda, G., Bunster, L., Cobos, L., Corbalán, R., Dussaillant, G., Eggers, G., Florenzano, F., Godoy, G., Huidobro, L.A., Lahsen, R., Lanas, F., Larenas, G., Manriquez, L., Medina, M., Palma, J.C., Perez, L., Potthoff, S., Raffo, C., Reyes, E., Saavedra, V., Sanhueza, P., Sepulveda, P., Solis, C.L., Soto, N., Torres, C., Westerberg, B., Yañez, M., Chen, L., Dong, Y., Du, J., Guo, X., Han, P., Hu, T., Jiang, B., Ke, Y., Li, Z., Lu, J., Ma, C., Peng, Y., Shi, Y., Su, G., Tang, B., Xu, B., Yang, J., Yang, Y., Accini, J.L., Arteaga, J.M., Botero, R., Castillo, G., Coronel, J., Cure, C., Garcia, H., Garcia, L., Gomez, C., Hernandez Triana, E., Hernandez, H., Lopez, M., Lopez, P., Manzur, F., Molina, D., Rodriguez, J., Sanchez Vallejo, G., Yupanqui, H., Bronnum-Schou, J., Kaiser Nielsen, P., Nielsen, H., Rønne, H., 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Khaisheva, L., Khalimov, Y., Kobalava, Z., Kosmachova, E., Kostenko, V., Koziolova, N., Kulibaba, E., Lesnov, V., Libov, I., Lyamina, N., Markov, V., Moiseev, V., Molchanova, O., Oleynikov, V., Orlikova, O., Panov, A., Rafalskiy, V., Rodionova, T., Samitin, V., Schokotov, V., Shilkina, N., Shogenov, Z., Shustov, S., Shvarts, Y., Sobolev, K., Stryuk, R., Suplotova, L., Viktorova, I., Vishnevsky, A., Vorokhobina, N., Yakusevich, V., Yakushin, S., Zadionchenko, V., Zalevskaya, A., Zalevsky, G., Zateyshchikova, A., Andjelic Jelic, M., Kocic, R., Komnenovic, S., Lalic, K., Lalic, N., Micic, D., Otasevic, P., Pesic, M., Seferovic, P., Stankovic, G., Arnold, S., Burgess, L., Coetzee, K., Dawood, S., Delport, E., Ebrahim, I., Ellis, G., Ismail, S., Kelbe, D., Naidoo, V., Ntsekhe, M., Sebastian, P.J., Siebert, M., Van Zyl, L., Venter, T., Lonso, E., Antorrena, I., Bodi, V., Botella, M., De La Fuente, J., Delgado, E., Duran Garcia, S., Elorza, J., Enciso, F., Gaztambide, S., Marin, F., Martin, 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P., Adenuga, B., Ahmad, Z., Akinboboye, O., Akright, L., Alappat, P., Alawad, M., Alfonso, T., Alimard, R., Alzohaili, O., Ariani, M., Arora, C., Azad, N., Azzam, S., Benjamin, S., Block, B., Borzadek, E., Breisblatt, W., Bright, T., Byrd, L., Chiou, C., Chochinov, R., Christensen, T., Christofides, E., Cohen, R., Dawood, G., De Souza, J., Dempsey, M., Eagerton, D., East, C., Elder, C., Fernando, R., Fogelfeld, L., Foucauld, J., French, W., Frohnauer, M., Gaffney, M., Gangopadhyay, S., Gogia, H., Gosmanov, A., Greenberg, C., Greenway, F., Hanna, E., Hargrove, J., Harris, A., Harris, B., Hart, T., Herrington, D., Hewitt, M., Howard, D., Izuora, K., Jetty, P., Kapoor, A., Kasper, J.F., Kelehan, S., Kelly, R., Kereiakes, D., Khaira, A., Khan, M., Khan, S., Korban, E., Kosiborod, M., Laguerre, J., Larocque, J., Latif, K., Lester, F., Levin, P., Levine, S., Li, C., Lovell, C., Lupovitch, S., Madu, I.-J., Mahabadi, V., Mahmood, A., Maragos, S., Mariash, C., Martin, P., Mathew, J., May, M., 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S., Webster, B., Weindorff, K., Welch, M., Welker, J., White, A., White, L., Williams, M., Wu, W.-C., Wynne, A., Yocono, M., and Yuen, K.

Abstract

Background: Cardiovascular (CV) disease is the leading cause of morbidity and mortality in patients with type 2 diabetes mellitus (T2DM). Furthermore, patients with T2DM and acute coronary syndrome (ACS) have a particularly high risk of CV events. The glucagonlike peptide 1 receptor agonist, lixisenatide, improves glycemia, but its effects on CV events have not been thoroughly evaluated. Methods: ELIXA (www.clinicaltrials.gov no. NCT01147250) is a randomized, double-blind, placebo-controlled, parallelgroup, multicenter study of lixisenatide in patients with T2DM and a recent ACS event. The primary aim is to evaluate the effects of lixisenatide on CV morbidity and mortality in a population at high CV risk. The primary efficacy end point is a composite of time to CV death, nonfatal myocardial infarction, nonfatal stroke, or hospitalization for unstable angina. Data are systematically collected for safety outcomes, including hypoglycemia, pancreatitis, and malignancy. Results: Enrollment began in July 2010 and ended in August 2013; 6,068 patients from 49 countries were randomized. Of these, 69% are men and 75% are white; at baseline, the mean ± SD age was 60.3 ± 9.7 years, body mass index was 30.2 ± 5.7 kg/m2, and duration of T2DM was 9.3±8.2 years. The qualifying ACS wasamyocardial infarctionin83% and unstableangina in 17%. The study will continue until the positive adjudication of the protocol-specified number of primary CV events. Conclusion: ELIXA will be the first trial to report the safety and efficacy of a glucagon-like peptide 1 receptor agonist in people with T2DM and high CV event risk. © 2015 Elsevier Inc. All rights reserved.

Published
2015

20. The use of a digital computer for calculation of acoustic fields of complex vibrating structures by the reciprocity principle

Author

Rimskiy-Korsakov, A. V and Belousov, Y. I

Subjects
Structural Mechanics
Abstract

A program was compiled for calculating acoustical pressure levels, which might be created by vibrations of complex structures (an assembly of shells and rods), under the influence of a given force, for cases when these fields cannot be measured directly. The acoustical field is determined according to transition frequency and pulse characteristics of the structure in the projection mode. Projection characteristics are equal to the reception characteristics, for vibrating systems in which the reciprocity principle holds true. Characteristics in the receiving mode are calculated on the basis of experimental data on a point pulse space velocity source (input signal) and vibration response of the structure (output signal). The space velocity of a pulse source, set at a point in space r, where it is necessary to calculate the sound field of the structure p(r,t), is determined by measurements of acoustic pressure, created by a point source at a distance R. The vibration response is measured at the point where the forces F and f exciting the system should act.

Published
1973

31. The safety and efficacy of formoterol (Oxis®) Turbuhaler® plus budesonide (Pulmicort®) Turbuhaler in mild to moderate asthma: A comparison with budesonide Turbuhaler alone and current non-corticosteroid therapy in Russia

Author

Chuchalin, A. G., Svetlana Ovcharenko, Goriachkina, L. A., Sidorenko, I. V., Tsoi, A. N., Alekseev, V. G., Bart, B. Y., Borisova, N. K., Belousov, Y. B., Golovko, M. G., Chereiskaya, N. K., Daniliak, I. G., Didkovsky, N. A., Dobrotina, I. S., Emelyanov, A. V., Korovina, O. V., Mamtsev, B. N., Sokurenko, S. I., Valekjanina, T. G., and Zadionchenko, V. S.

33. Comparison of fondaparinux and enoxaparin in acute coronary syndromes

Author

Yusuf, S., Mehta, S. R., Bassand, J. P., Budaj, A., Chrolavicius, S., Fox, K. A. A., Granger, C. B., Joyner, C., Peters, R. J. G., Wallentin, L., Avezum, A., Boden, W., Cardona, E., Ceremuzynski, L., Col, J., Commerford, P. J., Diaz, R., Faxon, D., Flather, M., Fodor, G., Franzosi, M. G., Granger, C., Halon, D., Hunt, D., Karatzas, N., Keltai, M., Kenda, M., Kim, J. H., Lanas, F., Lau, C. P., Lewis, B. S., Morais, J., Moccetti, T., Pais, P., Paolasso, E., Parkhomenko, A., Petrauskiene, B., Piegas, L., Pipilis, A., Robaayah, D., Ruda, M., Rumboldt, Z., Rupprecht, H. J., Sitkei, E., Steg, P. G., Swahn, E., Theroux, P., Valentin, V., Varigos, J., Weitz, J., White, H., Widimsky, P., Xavier, D., Zhu, J. R., Ameriso, S., Bonilla, C., Braekken, S., Chan, Y. K., Chen, W., Chenniappan, M., Cohen, E., Cottin, Y., Csiba, L., Czepiel, A., Raedt, H., Finet, G., Gardinale, E., Gaxiola, E., Gorecki, A., Gregor, P., Happola, O., Heras, M., Himbert, D., Irkin, O., Isaaz, K., Iyengar, S. S., Kalvach, P., Kevers, L., Klosiewicz-Wasek, B., Laine, M., Leys, D., Lundstrom, E., Lusic, I., Lutay, Y., Maggioni, A., Massaro, A., Mayosi, B. M., Moulin, T., Narendra, J., Naslund, U., Peeters, A., Penicka, M., Perakis, A., Petersen, P., Polic, S., Radhakrishnan, S., Renkin, J., Stockins, B., Sundararajan, R., Thygesen, K., Turazza, F., Belle, E., Vik-Mo, H., Zaborski, J., Sleight, P., Anderson, J. L., Johnstone, D. E., Hirsh, J., Demets, D., Holmes, D. R., Meeks, B., Afzal, R., Pogue, J., Boccalon, S., Chrysler, K., Cracknell, B., Horsman, C., Hoskin, T., Jedrzejowski, B., Johnson, J., Kotlan, S., Lawrence, M., Smiley, M., Stevens, C., Yallup, R., Connolly, S., Demers, C., Devereaux, P. J., Healey, J., Lonn, E., Magloire, P., Mckelvie, R., Morillo, C., Natarajan, M., Rokoss, M., Teo, K., Valettas, N., Velianou, J., Albisu, J. P., Amuchastegui, M., Bello, F. A., Bluguermann, J. J., Bono, J. O., Caccavo, A., Carlevaro, O. O., Cassettari, A., Cuneo, C., Farras, H. A., Fuselli, J., Garrido, M., Guerrero, R., Hasbani, E., Hominal, M. A., Hrabar, A., Marquez, L. L., Luciardi, H. L., Riera, L. M., Marzetti, E. M., Memoli, R., Nordaby, R., Orlandini, A. D., Perez, M., Piasentin, J. A., Ramos, H. R., Risolo, A. M., Sala, J., Salomone, O., Schygiel, P. O., Ubaldini, J., Vico, M., Amerena, J., Arnolda, L., Aroney, G., Boyd, P., Cahill, P., Chew, D., Counsell, J. T., Cross, D., Edington, J., Fitzpatrick, D., Hicks, P., Horowitz, J. D., Horrigan, M. C. G., New, G., Owensby, D., Schoeman, M., Thompson, P., Tulloch, G., Waites, J., Whelan, A., Ziffer, R., Huber, K., Jordanova, N., Al Shawafi, K., Convens, C., Coussement, P., Meester, A., El Allaf, D., Janssens, L., Marcovitch, O., Muyldermans, L., Roosen, J., Soeur, F., Lierde, J., Vrolix, M., Leaes, P., Carvalho, A. C., Schramm, E. C., Mora, R. D., Amino, J. D., Dutra, O., Manenti, E. R. F., Gun, C., Saraiva, J. F. K., Hayashi, E. K., Lichter, A., Lima, A., Marin-Neto, J. A., Teixeira, S. P. M., Abrantes, J. A. M., Baracioli, L. M., Nicolau, J. C., Maia, L. N., Jaeger, C. P., Esteves, J. P., Rabelo, A., Ramos, R. F., Reis, G., Rossi, P., Dos Santos, F. R., Teixeira, M. S., Silveira, D. S., Lemos, Mabt, Timerman, A., Greque, G. V., Vaz, R., Bhargava, R., Brons, S., Colclough, M., Constance, C., Costi, P., Dacyk, A., Davies, T., Diodati, J., Dupuis, R., Elliott, H., Fell, D. A., Fung, A. Y., Gladstone, P. J. S., Gosselin, G., Grondin, F., Huynh, T., Janzen, I., Kalaparambath, T., Kornder, J., Kouz, S., Kuritzky, R., Labelle-Stimac, S., Lamothe, M., Lauzon, C., Lemay, M., Ma, P., Maccallum, G. C., Mccallum, A., Mitchell, D., Montigny, M., Nguyen, N., Pearce, M., Pistawka, K. J., Rebane, T., Roy, M., Senaratne, M., Smith, J., Stimac, J., Traboulsi, M., Vizel, S., Weeks, A., Zadra, R., Zimmerman, R. H., Alcaino, M. E., Castro, P., Chen, J., Chen, J. L., Fan, W., Ge, J., Hu, D., Huang, J., Jingxuan, G., Ke, Y., Ma, H., Wu, Y., Yingxian, S., Yu, B., Zhu, W., Bakula, M., Bergovec, M., Lukin, A., Milicevic, G., Padovan, M., Raguz, M., Aschermann, M., Belohlavek, J., Bocek, P., Branny, M., Budesinsky, T., Groch, L., Holm, F., Jansky, P., Jelinek, P., Jirka, V., Kaislerova, M., Konecny, P., Lisa, L., Maly, M., Marcinek, G., Oscipovsky, M., Stumar, J., Vacha, M., Nielsen, T., Vigholt, E., Laanmets, P., Soopold, U., Voitk, J., Naveri, H., Niemela, M., Peuhkurinen, K., Tuomainen, P., Ylitalo, A., Py, A., Amat, G., Bessede, G., Boschat, J., Carrie, D., Charbonnier, B., Coliet, J. P., Dambrine, P., Dubois-Rande, J. L., Ferrari, E., Fouche, R., Grollier, G., Jaboureck, O., Ketelers, R., Khalife, K., Leroy, F., Lognone, T., Macquin-Mavier, I., Montalescot, G., Pacouret, G., Poulard, J. E., Puel, J., Richard, M., Schiele, F., Bischoff, K. O., Buerke, M., Buerke, U., Dominick, K., Drexler, H., Feiler, A., Guelker, H., Haltern, G., Katus, H. A., Klauss, V., Klutmann, M., Koeth, O., Meinhardt, G., Muenzel, T. M., Nitschke, T., Offterdinger, M., Rieber, J., Schieffer, B., Stangl, K., Stangl, V., Vom Dahl, J., Witzenbichler, B., Zeymer, U., Alexopoulos, D., Blassopoulou, N., Christon, A., Fotiadis, I., Foussas, S., Grapsas, N., Moschos, N., Papasteriadis, E., Symeonidis, D., Tyrologos, A., Leung, W. S., Li, S. K., Arabadzisz, H., Csikazs, J., Dancs, T., Davidovits, Z., Edes, I., Farkas, E., Herczeg, B., Janos, S., Janosi, A., Kadar, A., Kis, E., Kristof, E., Lupkovics, G., Mark, L., Nagy, A., Nagy, L., Poor, F., Regos, L., Sebo, J., Tomcsanyi, J., Toth, K., Bharani, A., Chidambaram, N., Haridas, K. K., Jain, A., Jain, P. R. K., Jaison, T. M., Kerkar, P. G., Naik, S., Nambiar, A., Panwar, R. B., Parikh, K., Puri, V. K., Rajesh, T., Ramesh, M., Singh, B., Thanikachalam, S., Tongia, R. K., Varma, S., Barbiero, M., Bardelli, G., Bernardi, D., Bolognese, L., Capponi, L., Ferrari, G., Fanelli, R., Frediani, L., Galli, M., Izzo, A., Lombardi, A., Maresta, A., Martinoni, A., Melloni, C., Meneghetti, P., Mennuni, M., Moretti, L., Orlandi, M., Pancaldi, L. G., Petronzelli, S., Piovaccari, G., Salvioni, A., Severini, D., Terrosu, P., Zanini, R., Erglis, A., Kalnins, U., Verboenko, J., Zakke, I., Kugiene, R., Zaliunas, R., Bin Othman, A., Chee, K. H., Hian, S. K., Gutierrez, A. C., Diaz, A. C., Garcia-Castillo, A., Guerrero, M. C., Morales, C. L., Ramos-Lopez, G., Baldew, S. C., Basart, D. C. G., Clappers, N., Daniels, M. C. G., Weerd, G. J., Den Hartog, F. R., Hendriks, Ihgm, Herrman, J. P. R., Kofflard, M., Krasznai, K., Michels, H. R., Stoel, I., Ten Berg, J. M., Umans, Vawn, Beek, G. J., Daele, Merm, Den Berg, B. J., Hessen, M. W. J., Kalmthout, P. M., Rossum, P., Verheugt, F. W. A., Viergever, E. P., Withagen, Ajam, Achremczyk, P., Arasimowicz, P., Baranowska, T., Biegayto, J., Bronisz, M., Buszman, P., Dalkowski, M., Dluzniewski, M., Gessek, J., Goch, J. H., Janik, K., Janion, M., Kawecki, D., Kleinrok, A., Komorowski, P., Krasowski, W., Krauze-Wielicka, M., Malinowski, S., Nowak, T., Nowakowski, P., Ogorek, M., Piepiorka, M., Pluta, W., Puzio, E., Puzniak, M., Rekosz, J., Rybka, P., Sendrowski, D., Siminiak, T., Skura, M., Stopinski, M., Szetemej, R., Szolkiewicz, M., Szpajer, M., Trusz-Gluza, M., Waszyrowski, T., Wita, K., Wodniecki, J., Wojewoda, P., Zambrzycki, J., Zielinski, Z., Cardoso, P., Carrageta, D. M., Ferreira, D., Gomes, M. V., Santos, L., Arkhipov, M., Belousov, Y., Charchoglyan, R., Gordeev, I. G., Gratsiansky, N. A., Grinshtein, Y., Khrustalev, O., Kokorin, V. A., Komarov, A., Kozulin, V., Minushkina, L. O., Panchenko, E., Panov, A., Petrik, E. S., Shakhnovich, R. M., Shalaev, S. V., Sukhinina, T. S., Trifonov, I. R., Zateyshchikov, D. A., Khoo, B. C. H., Tan, H. C., Tan, R. S., Hricak, V., Motovska, Z., Poliacik, P., Kanic, V., Kovacic, D., Kranjec, I., Voga, G., Bayat, J., Essop, M. R., Maritz, F., Marx, J. D., Ntsekhe, M., Pretorius, M. P., Ranjith, N., Theron, H., Chae, I. H., Chae, S. C., Choe, K. H., Chung, N. S., Jeong, M. H., Kim, C. J., Kim, H. S., Kim, W., Rhim, C. Y., Shin, E. K., Shin, G. J., Alameda, M., Alonso-Orcajo, N., Bethencourt, A., Calvo, F., Avellaneda, J. L. C., Delgado, V., Diaz-Castro, O., Esplugas, E., Faus, R., Antonio Fernandez-Ortiz, Frutos, A., Goirena, P., Iglesias, F. C., Llorian, A. R., Macaya, C., Mancisidor, X., Melgares, R., Pascual, C., Ruiz-Nodar, J. M., Simon, J. M., Agewall, S., Ahlstrom, P., Ali, M., Andersson, L., Bandh, S., Digerfeldt, C., Ericsson, H., Forsgren, M., Jabro, J., Janzon, M., Joborn, H., Johnston, N., Karlsson, J. E., Larsson, L. E., Linderfalk, C., Lonnberg, I., Mooe, T., Oldgren, J., Pihl, E., Risenfors, M., Sjolund, E., Soderberg, I., Stjerna, A., Svennberg, L., Wodlin, P., Pagnamenta, A., Pieper, M., Rossi, M. G., Weber, K., Peng, M. C., Cheng, J. J., Chiang, F. T., Kuo, C. T., Tseng, C. D., Andreyeshcheva, I., Dzyak, G. V., Fedtchouk, L., Gontar, A., Karpenko, O., Kononenko, L., Koval, E. A., Kovalsky, I., Kraitz, I., Netiazhenko, V., Polyvoda, S., Prokopenko, Y., Prudkiy, I., Rudenko, L., Serediuk, N., Zolotaykina, V., Adgey, J., Ahsan, A., Brack, M., Bridges, A. B., Burton, J., Findlay, I., Fluck, D. S., Radford, L., Robson, R. H., Senior, R., Starkey, I. R., Alexander, J., Baber, Z., Campbell, M., Caputo, R., Chandna, H., Chandrashekhar, Y., Chu, A., Deraad, R. E., Druken, B., Goyal, A., Holly, D., Kemp, A., Kotlaba, D., Levine, M. J., Miller, G. P., Nygaard, T., Parikh, D. K., Ramos, C., Rivera, E., Rodriguez, R., Sangani, B., Walder, J. S., and Oasis

38. New approach to describe two coupled spins in a variable magnetic field

Author

Alessandro Sergi, Agostino Migliore, Roberto Grimaudo, Antonino Messina, Yuri Belousov, Belousov Y., Grimaudo R., Messina A., Migliore A., and Sergi A.

Subjects
Quantum Computation, Physics, Quantum Physics, Geometric Phase, Spins, FOS: Physical sciences, Schrödinger equation, Magnetic field, symbols.namesake, Exact solutions in general relativity, Quantum mechanics, symbols, Hamiltonian (quantum mechanics), Adiabatic process, Axial symmetry, Quantum Physics (quant-ph), Qubits, Hyperfine structure
Abstract

We propose a method to describe the evolution of two spins coupled by hyperfine i nteraction in an external time- dependent magnetic field. We apply the approach to the case of hyperfine interaction with axial symmetry, which can be solved exactly in a constant, appropriately oriented magnetic field. In order to t reat t he n onstationary d ynamical p roblem, we modify the time-dependent Schrödinger equation through a change of representation that, by exploiting an instantaneous (adiabatic) basis makes the time-dependent Hamiltonian diagonal at any time instant. The solution of the transformed time-dependent Schrödinger FRVBUJPO in the form of chronologically ordered exponents with transparent pre-exponential coefficients is reported. This solution is highly simplified when an adiabatically varying magnetic field perturbs the system. The approach here proposed may be used for the perturbative treatment of other dynamical problems with no exact solution.

Published
2021

39. Hubble Meets Webb: Image-to-Image Translation in Astronomy.

Author

Kinakh V, Belousov Y, Quétant G, Drozdova M, Holotyak T, Schaerer D, and Voloshynovskiy S

Abstract

This work explores the generation of James Webb Space Telescope (JWSP) imagery via image-to-image translation from the available Hubble Space Telescope (HST) data. Comparative analysis encompasses the Pix2Pix, CycleGAN, TURBO, and DDPM-based Palette methodologies, assessing the criticality of image registration in astronomy. While the focus of this study is not on the scientific evaluation of model fairness, we note that the techniques employed may bear some limitations and the translated images could include elements that are not present in actual astronomical phenomena. To mitigate this, uncertainty estimation is integrated into our methodology, enhancing the translation's integrity and assisting astronomers in distinguishing between reliable predictions and those of questionable certainty. The evaluation was performed using metrics including MSE, SSIM, PSNR, LPIPS, and FID. The paper introduces a novel approach to quantifying uncertainty within image translation, leveraging the stochastic nature of DDPMs. This innovation not only bolsters our confidence in the translated images but also provides a valuable tool for future astronomical experiment planning. By offering predictive insights when JWST data are unavailable, our approach allows for informed preparatory strategies for making observations with the upcoming JWST, potentially optimizing its precious observational resources. To the best of our knowledge, this work is the first attempt to apply image-to-image translation for astronomical sensor-to-sensor translation.

Published
2024
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40. TURBO: The Swiss Knife of Auto-Encoders.

Author

Quétant G, Belousov Y, Kinakh V, and Voloshynovskiy S

Abstract

We present a novel information-theoretic framework, termed as TURBO, designed to systematically analyse and generalise auto-encoding methods. We start by examining the principles of information bottleneck and bottleneck-based networks in the auto-encoding setting and identifying their inherent limitations, which become more prominent for data with multiple relevant, physics-related representations. The TURBO framework is then introduced, providing a comprehensive derivation of its core concept consisting of the maximisation of mutual information between various data representations expressed in two directions reflecting the information flows. We illustrate that numerous prevalent neural network models are encompassed within this framework. The paper underscores the insufficiency of the information bottleneck concept in elucidating all such models, thereby establishing TURBO as a preferable theoretical reference. The introduction of TURBO contributes to a richer understanding of data representation and the structure of neural network models, enabling more efficient and versatile applications.

Published
2023
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41. Influence of Ligand Environment Stoichiometry on NIR-Luminescence Efficiency of Sm 3+ , Pr 3+ and Nd 3+ Ions Coordination Compounds.

Author

Polikovskiy T, Korshunov V, Metlin M, Gontcharenko V, Metlina D, Datskevich N, Kiskin M, Belousov Y, Tsorieva A, and Taydakov I

Abstract

Six new complexes of the ligand HQ cy (-4-(cyclohexanecarbonyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one) and Ln 3+ ions with emission in the near-infrared (Nd 3+ ) or visible and near-infrared (Sm 3+ , Pr 3+ ) spectral regions were synthesized and characterized using various methods, including single crystal X-ray diffraction. The study demonstrated that both tris complexes [LnQ cy 3 (H 2 O)(EtOH)] and tetrakis-acids [H 3 O][LnQ cy 4 ] can be synthesized by varying the synthetic conditions. The photochemical properties of the complexes were investigated experimentally and theoretically using various molecular spectroscopy techniques and Judd-Ofelt theory. The objective was to quantitatively and qualitatively disclose the influence of complex stoichiometry on its luminescence properties. The study showed that the addition of an extra ligand molecule (in the tetrakis species) increased molar extinction by up to 2 times, affected the shape of photoluminescence spectra, especially of the Pr 3+ complex, and increased the quantum yield of the Sm 3+ complex by up to 2 times. The results obtained from this study provide insights into the luminescent properties of lanthanide coordination compounds, which are crucial for the design and development of novel photonic materials with tailored photophysical properties.

Published
2023
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42. Dynamics of the Ligand Excited States Relaxation in Novel β-Diketonates of Non-Luminescent Trivalent Metal Ions.

Author

Polikovskiy T, Korshunov V, Gontcharenko V, Kiskin M, Belousov Y, Pettinari C, and Taydakov I

Subjects
Ligands, Ions, Crystallography, X-Ray, Luminescence, Metals
Abstract

Complexes emitting in the blue spectral region are attractive materials for developing white-colored light sources. Here, we report the luminescence properties of novel coordination compounds based on the trivalent group 3, 13 metals, and the 1-phenyl-3-methyl-4-cyclohexylcarbonyl-pyrazol-5-onate (Q CH ) ligand. [M(Q CH ) 3 ] (M = Al, Ga, and In), [M(Q CH ) 3 (H 2 O)] (M = Sc, Gd, and Lu), [Lu(Q CH ) 3 (DMSO)], and [La(Q CH ) 3 (H 2 O)(EtOH)] complexes were synthesized and structurally characterized by a single-crystal X-ray diffraction study. It has been found that the luminescence quantum yields of the ligand increase by one order of magnitude upon metal coordination. A significant correspondence between the energies of the ligand's excited states and the luminescence quantum yields to the metal ion's atomic numbers was found using molecular spectroscopy techniques. The replacement of the central ion with the heavier one leads to a monotonic increase in singlet state energy, while the energy of the triplet state is similar for all the complexes. Time-resolved measurements allowed us to estimate the intersystem crossing (ISC) rate constants. It was shown that replacing the Al 3+ ion with the heavier diamagnetic Ga 3+ and In 3+ ions decreased the ISC rate, while the replacement with the paramagnetic Gd 3+ ion increased the ISC rate, which resulted in a remarkably bright and room-temperature phosphorescence of [Gd(Q CH ) 3 (H 2 O)].

Published
2023
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43. Pseudo-Qutrit Formed by Two Interacting Identical Spins (s = 1/2) in a Variable External Magnetic Field.

Author

Belousov Y, Chernousov I, and Man'ko V

Abstract

An analytical solution is obtained for the problem of two interacting, identical but separated spin 1/2 particles in a time-dependent external magnetic field, in a general case. The solution involves isolating the pseudo-qutrit subsystem from a two-qubit system. It is shown that the quantum dynamics of a pseudo-qutrit system with a magnetic dipole-dipole interaction can be described clearly and accurately in an adiabatic representation, using a time-dependent basis set. The transition probabilities between the energy levels for an adiabatically varying magnetic field, which follows the Landau-Majorana-Stuckelberg-Zener (LMSZ) model within a short time interval, are illustrated in the appropriate graphs. It is shown that for close energy levels and entangled states, the transition probabilities are not small and strongly depend on the time. These results provide insight into the degree of entanglement of two spins (qubits) over time. Furthermore, the results are applicable to more complex systems with a time-dependent Hamiltonian.

Published
2023
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44. Symmetry-Induced Emergence of a Pseudo-Qutrit in the Dipolar Coupling of Two Qubits.

Author

Belousov Y, Man'ko VI, Migliore A, Sergi A, and Messina A

Abstract

We investigate a system of two identical and distinguishable spins 1/2, with a direct magnetic dipole-dipole interaction, in an external magnetic field. Constraining the hyperfine tensor to exhibit axial symmetry generates the notable symmetry properties of the corresponding Hamiltonian model. In fact, we show that the reduction of the anisotropy induces the invariance of the Hamiltonian in the 3×3 subspace of the Hilbert space of the two spins in which S^2 invariably assumes its highest eigenvalue of 2. By means of appropriate mapping, it is then possible to choose initial density matrices of the two-spin system that evolve in such a way as to exactly simulate the time evolution of a pseudo-qutrit, in the sense that the the actual two-spin system nests the subdynamics of a qutrit regardless of the strength of the magnetic field. The occurrence of this dynamic similitude is investigated using two types of representation for the initial density matrix of the two spins. We show that the qutrit state emerges when the initial polarizations and probability vectors of the two spins are equal to each other. Further restrictions on the components of the probability vectors are reported and discussed.

Published
2022
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45. Sensitive and specific assay for the simultaneous detection of Mycoplasma genitalium and macrolide resistance-associated mutations.

Author

Braam JF, van Marm S, Severs TT, Belousov Y, Mahoney W, and Kusters JG

Subjects
Adolescent, Adult, Antitubercular Agents therapeutic use, Female, Humans, Macrolides therapeutic use, Male, Middle Aged, Mutation, Mycoplasma Infections drug therapy, RNA, Ribosomal, 23S genetics, Real-Time Polymerase Chain Reaction, Sensitivity and Specificity, Young Adult, Antitubercular Agents pharmacology, Drug Resistance, Bacterial, Macrolides pharmacology, Mycoplasma Infections diagnosis, Mycoplasma Infections microbiology, Mycoplasma genitalium drug effects, Mycoplasma genitalium genetics
Abstract

Patients infected by Mycoplasma genitalium are often treated empirically with the macrolide azithromycin. Macrolide resistance is becoming quite common; empirical treatment is compromised. Sequencing was initially used to detected azithromycin resistance-associated mutations. As this was laborious, qPCRs have been developed for their detection. In the present study, we describe a fast, sensitive, and specific qPCR assay that enables routine testing of M. genitalium and macrolide resistance-associated mutations in a single assay. M. genitalium positive clinical samples were used to compare (i) the commonly used MgPa assay for the detection of M. genitalium infections (MgPa qPCR), (ii) a combined 23S rRNA gene PCR/sequencing assay (Mg23S qPCR/Sequencing) to identify macrolide resistance-associated mutations, and (iii) our newly developed probe-based melt curve qPCR for simultaneous detection of M. genitalium and macrolide resistance-associated mutations (Macrolide-R/MG ELITe MGB Kit, Elitech Bothel USA in short Mg Macrolide R qPCR). Specificity of the qPCR was tested using urogenital samples that were tested positive for a range of other micro-organisms. M. genitalium was detected in 196/236 (83.1%) samples by the MgPa qPCR, versus 172/236 (72.9%) by the combined Mg23S qPCR/Sequencing, and 202/236 (85.6%) by the Mg Macrolide R qPCR. The Mg Macrolide R qPCR showed high concordance to the Mg23S qPCR/Sequencing assay (201 vs 202 could be genotyped, respectively) for the detection of the macrolide resistant mutations. None of the other urogenital pathogens were tested positive in the Mg Macrolide R qPCR, indicating specificity. The Mg Macrolide R qPCR is fast, sensitive, specific, and can easily be implemented in the routine diagnostics.

Published
2018
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46. A rapid, instrument-free, sample-to-result nucleic acid amplification test.

Author

Lafleur LK, Bishop JD, Heiniger EK, Gallagher RP, Wheeler MD, Kauffman P, Zhang X, Kline EC, Buser JR, Kumar S, Byrnes SA, Vermeulen NM, Scarr NK, Belousov Y, Mahoney W, Toley BJ, Ladd PD, Lutz BR, and Yager P

Subjects
Equipment Design, Humans, Methicillin-Resistant Staphylococcus aureus genetics, Methicillin-Resistant Staphylococcus aureus isolation & purification, Nose microbiology, Nucleic Acid Amplification Techniques instrumentation, Paper, Time Factors, Nucleic Acid Amplification Techniques methods
Abstract

The prototype demonstrated here is the first fully integrated sample-to-result diagnostic platform for performing nucleic acid amplification tests that requires no permanent instrument or manual sample processing. The multiplexable autonomous disposable nucleic acid amplification test (MAD NAAT) is based on two-dimensional paper networks, which enable sensitive chemical detection normally reserved for laboratories to be carried out anywhere by untrained users. All reagents are stored dry in the disposable test device and are rehydrated by stored buffer. The paper network is physically multiplexed to allow independent isothermal amplification of multiple targets; each amplification reaction is also chemically multiplexed with an internal amplification control. The total test time is less than one hour. The MAD NAAT prototype was used to characterize a set of human nasal swab specimens pre-screened for methicillin-resistant Staphylococcus aureus (MRSA) bacteria. With qPCR as the quantitative reference method, the lowest input copy number in the range where the MAD NAAT prototype consistently detected MRSA in these specimens was ∼5 × 10(3) genomic copies (∼600 genomic copies per biplexed amplification reaction).

Published
2016
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47. Isothermal strand displacement amplification (iSDA): a rapid and sensitive method of nucleic acid amplification for point-of-care diagnosis.

Author

Toley BJ, Covelli I, Belousov Y, Ramachandran S, Kline E, Scarr N, Vermeulen N, Mahoney W, Lutz BR, and Yager P

Subjects
Bacterial Proteins isolation & purification, DNA, Bacterial isolation & purification, Humans, Isoenzymes genetics, Isoenzymes isolation & purification, L-Lactate Dehydrogenase isolation & purification, Methicillin-Resistant Staphylococcus aureus isolation & purification, Nucleic Acid Amplification Techniques economics, Staphylococcal Infections microbiology, Time Factors, Bacterial Proteins genetics, DNA, Bacterial genetics, L-Lactate Dehydrogenase genetics, Methicillin-Resistant Staphylococcus aureus genetics, Nucleic Acid Amplification Techniques methods, Point-of-Care Systems economics, Staphylococcal Infections diagnosis
Abstract

We present a method of rapid isothermal amplification of DNA without initial heat denaturation of the template, and methods and probes for (a) real-time fluorescence detection and (b) lateral flow detection of amplicons. Isothermal strand displacement amplification (iSDA) can achieve >10(9)-fold amplification of the target sequence in <20 minutes at 49 °C, which makes it one of the fastest existing isothermal DNA amplification methods. iSDA initiates at sites where DNA base pairs spontaneously open or transiently convert into Hoogsteen pairs, i.e. "breathe", and proceeds to exponential amplification by repeated nicking, extension, and displacement of single strands. We demonstrate successful iSDA amplification and lateral flow detection of 10 copies of a Staphylococcus aureus gene, NO.-inducible l-lactate dehydrogenase (ldh1) (Richardson, Libby, and Fang, Science, 2008, 319, 1672-1676), in a clean sample and 50 copies in the presence of high concentrations of genomic DNA and mucins in <30 minutes. We also present a simple kinetic model of iSDA that incorporates competition between target and primer-dimer amplification. This is the first model that quantitates the effects of primer-dimer products in isothermal amplification reactions. Finally, we demonstrate the multiplexing capability of iSDA by the simultaneous amplification of the target gene and an engineered internal control sequence. The speed, sensitivity, and specificity of iSDA make it a powerful method for point-of-care molecular diagnosis.

Published
2015
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48. 7-aminobutynyl-8-aza-7-deazahypoxanthine as a quasi-universal nucleobase.

Author

Vorobiev AV, Scarr NK, Belousov Y, and Lukhtanov EA

Subjects
Hypoxanthines chemical synthesis, Oligonucleotides chemical synthesis, Oligonucleotides chemistry, Hypoxanthines chemistry, Purines chemistry, Pyrimidines chemistry
Abstract

Several 7-(hydroxy, amino, methylureido, and guanidino)alkynyl-substituted 8-aza-7-deaza- hypoxanthine analogues were investigated as potential universal nucleobases. 7-Aminobutynyl-8-aza-7-deazahypoxanthine was found to be the most promising quasi-universal nucleobase with improved hybridization and polymerase chain reaction (PCR) enhancing properties as compared to commonly used hypoxanthine (the nucleobase of inosine). It demonstrated improved ambiguity for pairing with A, T, and C bases and its base pairing properties can be summarized as follows: X:C∼X:A∼X:T > X:G. The improvement in PCR performance directly correlated with primer's Tm. Primers containing multiple 7-aminobutynyl-8-aza-7-deazahypoxanthines were successfully used without noticeable inhibition of Taq polymerase activity provided the modifications are positioned more than two bases away from the 3' end.

Published
2013
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49. A novel endonuclease IV post-PCR genotyping system.

Author

Kutyavin IV, Milesi D, Belousov Y, Podyminogin M, Vorobiev A, Gorn V, Lukhtanov EA, Vermeulen NM, and Mahoney W

Subjects
Agouti Signaling Protein, Alleles, Base Pair Mismatch, DNA Breaks, Double-Stranded, Fluorescent Dyes chemistry, Genes, APC, Genotype, Intercellular Signaling Peptides and Proteins genetics, Oligonucleotide Probes chemical synthesis, Thermodynamics, Deoxyribonuclease IV (Phage T4-Induced) metabolism, Escherichia coli Proteins metabolism, Nucleic Acid Hybridization methods, Polymerase Chain Reaction, Polymorphism, Single Nucleotide
Abstract

Here we describe a novel endonuclease IV (Endo IV) based assay utilizing a substrate that mimics the abasic lesions that normally occur in double-stranded DNA. The three component substrate is characterized by single-stranded DNA target, an oligonucleotide probe, separated from a helper oligonucleotide by a one base gap. The oligonucleotide probe contains a non-fluorescent quencher at the 5' end and fluorophore attached to the 3' end through a special rigid linker. Fluorescence of the oligonucleotide probe is efficiently quenched by the interaction of terminal dye and quencher when not hybridized. Upon hybridization of the oligonucleotide probe and helper probe to their complementary target, the phosphodiester linkage between the rigid linker and the 3' end of the probe is efficiently cleaved, generating a fluorescent signal. In this study, the use of the Endo IV assay as a post-PCR amplification detection system is demonstrated. High sensitivity and specificity are illustrated using single nucleotide polymorphism detection.

Published
2006
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50. Minor groove binder-conjugated DNA probes for quantitative DNA detection by hybridization-triggered fluorescence.

Author

Afonina IA, Reed MW, Lusby E, Shishkina IG, and Belousov YS

Subjects
Fluorescence, Gene Expression, Humans, Nucleic Acid Hybridization, Polymorphism, Single Nucleotide, Viral Load, DNA analysis, DNA Probes, Polymerase Chain Reaction methods
Abstract

Here we describe the properties of a novel class of oligonucleotide probes capable of sensitive hybridization-triggered fluorescence. These fluorogenic probes, known commercially as MGB Eclipse probes, are characterized by having a conjugated minor groove binder (MGB) ligand at the 5'-end and a fluorophore at the 3'-end. Additionally, they have an efficient quencher moiety at the 5'-end that is useful with a wide variety of fluorescent dyes. Fluorescence of the single-stranded MGB Eclipse probe is efficiently quenched by the interaction of the terminal dye and quencher groups when not hybridized. Upon hybridization to a complementary target, the MGB molecule folds into duplex and hyper-stabilizes it, allowing the use of shorter, more specific probe sequences. The 5'-MGB-quencher group also prevents nuclease digestion by Taq DNA polymerase during PCR. Because of the hybridization-triggered fluorescence and the excellent specificity imparted by the MGB, these 5'-MGB Eclipse probes have great versatility for real-time PCR applications. The high sensitivity and specificity are illustrated using single nucleotide polymorphism detection, viral load determination, and gene expression analysis.

Published
2002
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