Search Results - "Stamboliyska, B."

The altar wall paintings of the catholicon “The Nativity of the Virgin”, Rila Monastery, Bulgaria: Identification of the painting materials by means of vibrational spectroscopic techniques complemented by EDX, XRD and TGA analysis by Stamboliyska, B., Tapanov, S., Velcheva, E., Yancheva, D., Rogozherov, M., Glavcheva, Z., Lalev, G., Dimitrov, M.

“…The purpose of the present study is to deepen our knowledge about the painting materials and technology characteristics of iconography during the Bulgarian…”
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Insights in the radical scavenging mechanism of syringaldehyde and generation of its anion by Yancheva, D., Velcheva, E., Glavcheva, Z., Stamboliyska, B., Smelcerovic, A.

“…The ability of syringaldehyde, a naturally occurring phenolic antioxidant and medicinally important compound, to scavenge free radicals according different…”
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Analytical studies of the Alexandrovo Thracian tomb wall paintings by Glavcheva, Z., Yancheva, D., Velcheva, E., Stamboliyska, B., Petrova, N., Petkova, V., Lalev, G., Todorov, V.

“…[Display omitted] •DSC, FTIR, HRTEM and EDS analysis of archaeological samples.•Beeswax used as a binding agent in Thracian tomb wall paintings in the 4th…”
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IR spectral and structural changes caused by the conversion of 3-methoxy-4-hydroxybenzaldehyde (vanillin) into the oxyanion by Velcheva, E.A., Stamboliyska, B.A.

“…The spectral and structural changes, caused by the conversion of the vanillin molecule into the corresponding oxyanion have been studied by IR spectra and…”
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DFT-GIAO-NBO and 13C NMR study of the δ-syn-axial effect in 2,4-disubstituted adamantanes by Mikhova, B., Stamboliyska, B., Koch, A., Duddeck, H., Kleinpeter, E.

“…Six groups of diastereomeric 2,4‐disubstituted adamantanes were studied with DFT–GIAO–NBO (natural orbital analysis) methods. The calculated 13C chemical…”
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Comparative Study on the MDR Reversal Effects of Selected Chalcones by Ivanova, A. B., Batovska, D. I., Todorova, I. T., Stamboliyska, B. A., Serly, J., Molnar, J.

“…Based on the structure of three previously established lead compounds, fifteen selected chalcones were synthesized and evaluated for their multidrug resistance…”
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IR spectral and structural changes caused by the conversion of 3-hydroxybenzaldehyde into the oxyanion by Stamboliyska, B.A., Velcheva, E.A., Binev, I.G.

“…The spectral and structural changes, caused by the conversion of the 3-hydroxybenzaldehyde molecule into the corresponding oxyanion have been studied by IR…”
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Combined infrared spectroscopic and computational study on simpler capsaicin derivatives and their anion intermediates in the scavenging of free radicals by Yancheva, D., Stoyanov, S., Anichina, K., Nikolova, S., Velcheva, E., Stamboliyska, B.

“…[Display omitted] •Comparative study on the stability of benzylic, phenoxyl and amide radicals.•Radical scavenging ability and mechanisms similar to…”
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Characterization of art materials and degradation processes in the exterior wall paintings of the main church of Rila Monastery, Bulgaria by Stamboliyska, B., Tapanov, S., Kovacheva, D., Atanasova-Vladimirova, S., Ranguelov, B., Yancheva, D., Velcheva, E., Stoyanov, S., Guncheva, M., Fischer, D., Lederer, A.

“…The present study focused on the characterization of the art materials and the degradation processes in the exterior (exonarthex) mural paintings of the main…”
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Experimental and ab initio MO studies on the IR spectra and structure of pyridinium dicyanomethylide and trimethylammonium dicyanomethylide by Binev, Yuri I., Stamboliyska, Bistra A., Binev, Ivan G.

“…The structures of the title ylides have been studied by both quantitative infrared (IR) spectra and ab initio HF and MP2 force field calculations. Good…”
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IR spectra and structure of 2,5-pyrrolidinedione (succinimide) and of its nitranion: experimental and ab initio MO studies by Stamboliyska, B.A, Binev, Y.I, Radomirska, V.B, Tsenov, J.A, Juchnovski, I.N

“…The structures of 2,5-pyrrolidinedione (succinimide), its 15N labelled derivative, and of their nitranions have been studied on the basis of both quantitative…”
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The infrared spectra and structure of acetylsalicylic acid (aspirin) and its oxyanion: an ab initio force field treatment by Binev, I.G., Stamboliyska, B.A., Binev, Y.I.

“…The structures of acetylsalicylic acid (aspirin) (I) and its oxyanion (II) have been studied by means of infrared spectra and ab initio 3–21 G force field…”
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IR spectra and structure of 1-H-isoindole-1,3(2H)-dione (phthalimide), cis-hexahydro-1-H-isoindole-1,3(2H)-dione (hexahydrophthalimide) and of their nitranions by Binev, I.G, Stamboliyska, B.A, Binev, Y.I, Velcheva, E.A, Tsenov, J.A

“…The spectral and structural changes, accompanying the conversions of 1-H-isoindole-1,3(2H)-dione (phthalimide) and its cis-hexahydro derivative into the…”
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Structural changes caused by the conversion of 2-hydroxybenzamide (salicylamide) into the oxyanion by Velcheva, E.A., Stamboliyska, B.A.

“…The structure of the salicylamide molecule and its oxyanion have been studied by IR spectra and quantum chemical calculations within the Onsager…”
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DFT–GIAO–NBO and 13 C NMR study of the δ‐ syn ‐axial effect in 2,4‐disubstituted adamantanes by Mikhova, B., Stamboliyska, B., Koch, A., Duddeck, H., Kleinpeter, E.

“…Abstract Six groups of diastereomeric 2,4‐disubstituted adamantanes were studied with DFT–GIAO–NBO (natural orbital analysis) methods. The calculated 13 C…”
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DFT and experimental studies of the structure and vibrational spectra of curcumin by Kolev, Tsonko M., Velcheva, Evelina A., Stamboliyska, Bistra A., Spiteller, Michael

“…The potential energy surface of curcumin [1,7‐bis(4‐hydroxy‐3‐methoxyphenyl)‐1,6‐heptadiene‐3,5‐dione] was explored with the DFT correlation functional B3LYP…”
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Vibrational spectra and structure of benzophenone and its (18)O and d10 labelled derivatives: an ab initio and experimental study by Kolev, T M, Stamboliyska, B A

“…Infrared (4000-100 cm(-1)) and Raman (4000-10 cm(-1)) spectra of benzophenone, benzophenone-d10 and benzophenone-(18)O have been studied in the solid state and…”
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Vibrational spectra and structure of N-(4-cyanobenzylidene)-aniline, its 15N and D5 isotopomers and their monomeric dianions: an experimental and ab initio study by Ognyanova, V., Andreev, G.N., Stamboliyska, B., Juchnovski, I.N.

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Vibrational spectra and structure of N-(4-cyanobenzylidene)-aniline, its 15N and D 5 isotopomers and their monomeric dianions: an experimental and ab initio study by Ognyanova, V., Andreev, G.N., Stamboliyska, B., Juchnovski, I.N.

“…The structure of both N-(4-cyanobenzylidene)-aniline molecule and its monomeric dianion has been studied by means of vibrational spectra and ab initio…”
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Vibrational spectra and structure of benzil and its 18O- and d10-labelled derivatives: a quantum chemical and experimental study by Kolev, Tsonko M, Stamboliyska, Bistra A

“…Geometry and vibrational spectroscopic data of benzil-d0 benzil-d10 and benzil-18O calculated at various levels of theory (RHF/6-31G*, B3LYP/6-31G*,…”
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