Institution
Bulgarian Academy of Sciences
Government•Sofia, Bulgaria•
About: Bulgarian Academy of Sciences is a government organization based out in Sofia, Bulgaria. It is known for research contribution in the topics: Catalysis & Coupling constant. The organization has 17989 authors who have published 36276 publications receiving 642820 citations. The organization is also known as: Bulgarian Academy of Sciences,簡稱:BAS & Balgarska Akademiya na Naukite.
Papers published on a yearly basis
Papers
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TL;DR: It is concluded that the electrically evoked release of [3H]ACh in the three areas of the rat hippocampus can be differentially modulated by adenosine.
Abstract: The modulation by adenosine analogues and endogenous adenosine of the electrically evoked release of [3H]acetylcholine ([3H]ACh) was compared in subslices of the three areas of the rat hippocampus (CA1, CA3, and dentate gyrus). The mixed A1/A2 agonist 2-chloroadenosine (CADO; 2-10 microM) inhibited, in a concentration-dependent manner, the release of [3H]ACh from the three hippocampal areas, being more potent in the CA1 and CA3 areas than in the dentate gyrus. The inhibitory effect of CADO (5 microM) on [3H]ACh release was prevented by the A1 antagonist 1,3-dipropyl-8-cyclopentylxanthine (DPCPX; 50 nM) in the three hippocampal areas and was converted in an excitatory effect in the CA3 and dentate gyrus areas. The A2A agonist CGS-21680 (30 nM) produced a greater increase of the evoked release of [3H]ACh in the CA3 than in the dentate gyrus areas, whereas no consistent effect was found in the CA1 area or in the whole hippocampal slice. The excitatory effect of CGS-21680 (30 nM) in the CA3 area was prevented by the adenosine receptor antagonist 3,7-dimethyl-1-propargylxanthine (10 microM). Both adenosine deaminase (2 U/ml) and DPCPX (250 nM) increased the evoked release of [3H]ACh in the CA1 and CA3 areas but not in the dentate gyrus. The amplitude of the effect of DPCPX and adenosine deaminase was similar in the CA1 area, but in the CA3 area DPCPX produced a greater effect than adenosine deaminase. It is concluded that the electrically evoked release of [3H]ACh in the three areas of the rat hippocampus can be differentially modulated by adenosine.(ABSTRACT TRUNCATED AT 250 WORDS)
168 citations
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TL;DR: A new method for constructing minimal, deterministic, acyclic finite-state automata from a set of strings by adding new strings one by one and minimizing the resulting automaton on-the-fly.
Abstract: In this paper, we describe a new method for constructing minimal, deterministic, acyclic finite-state automata from a set of strings. Traditional methods consist of two phases: the first to construct a trie, the second one to minimize it. Our approach is to construct a minimal automaton in a single phase by adding new strings one by one and minimizing the resulting automaton on-the-fly. We present a general algorithm as well as a specialization that relies upon the lexicographical ordering of the input strings. Our method is fast and significantly lowers memory requirements in comparison to other methods.
168 citations
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TL;DR: In this article, it was shown that the catalytic activity of the gold/metal oxide catalysts depends strongly on the dispersion of gold particles but also on the state and the structure of the supports.
Abstract: It has been established that the gold catalysts on well crystallized supports, Au/Fe2O3 and Au/ZrO2, display higher catalytic activity in the water gas shift (WGS) reaction in comparison with the samples on amorphous and not well crystallized supports — Au/ZnO, Au/ZrO2, Au/Fe2O3–ZnO and Au/Fe2O3–ZrO2. It could be concluded that the catalytic activity of the gold/metal oxide catalysts depends strongly not only on the dispersion of the gold particles but also on the state and the structure of the supports.
168 citations
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TL;DR: This review summarizes recent developments in the synthesis, characterization and biological activity of α-aminophosphonic acid and N-analogues and indicates one of the potential future developments is peptide hydrolysis.
Abstract: Aminophosphonic acids are an important group of medicinal compounds, and their synthesis has been a focus of considerable attention in synthetic organic chemistry as well as medicinal chemistry. Although the phosphonic and carboxylic acid groups differ considerably with respect to shape, size, and acidity, α-aminophosphonic acids are considered to be structural analogues of the corresponding amino acids and the transition state mimics peptide hydrolysis. This review summarizes recent developments in the synthesis, characterization and biological activity of α-aminophosphonic acid and N-analogues. An account of both uses will be presented, emphasizing one of the potential future developments, and some implications in medicinal chemistry are also disclosed. In addition, a brief account on the characterization of N-(phosphonomethyl) glycine derivatives will be presented.
168 citations
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TL;DR: In this article, the authors reconstruct the Middle to Upper Miocene climate evolution in the southern Forecarpathian Basin (Central Paratethys area, Northwest Bulgaria) by applying the coexistence approach to 101 well-dated palynofloras isolated from three cores.
168 citations
Authors
Showing all 18074 results
Name | H-index | Papers | Citations |
---|---|---|---|
Dimitri Bourilkov | 134 | 1489 | 96884 |
Eduardo De Moraes Gregores | 133 | 1454 | 92464 |
Georgi Sultanov | 132 | 1493 | 93318 |
Plamen Iaydjiev | 131 | 1285 | 87958 |
Pedro G Mercadante | 129 | 1331 | 86378 |
Jordan Damgov | 129 | 1195 | 85490 |
Roumyana Hadjiiska | 126 | 1003 | 73091 |
Mircho Rodozov | 124 | 972 | 70519 |
Cesar Augusto Bernardes | 124 | 965 | 70889 |
Viktor Matveev | 123 | 1212 | 73939 |
Ayda Beddall | 120 | 816 | 67063 |
Andrey Marinov | 119 | 893 | 57183 |
Mariana Vutova | 117 | 606 | 56698 |
Lester Packer | 112 | 751 | 63116 |
Patrick Couvreur | 111 | 678 | 56735 |