doi: 10.1002/mrc.887
AbstractThe radical anions of monosubstituted benzophenones (including 2‐, 3‐ and 4‐methyl‐, 4‐tert‐butyl‐ and 4‐phenylbenzophenone) with lithium, sodium and potassium as countercations in tetrahydrofuran (THF) were studied by paramagnetic solvent 1H NMR shift measurements in the concentration range ca 0.1–1.0 M. In addition to the cation effects, marked positional isomer and substituent effects were found for (1) molar paramagnetism, (2) magnetic state, (3) solubility, (4) structural stability with respect to concentration or addition of cosolvents and (5) rapidity of attainment of their equilibrium structure. The major conclusions which can be drawn are (a) the solvation behavior of the countercation is governed by the anion, (b) an alkyl group in the 4‐position makes the structure of the lithium and sodium monosubstituted benzophenone radical anions concentration dependent and (c) in most cases, alkali metal aromatic ketone radical anions generated by electron transfer from the corresponding naphthalene radical anion attain their equilibrium structure rapidly. The data are interpreted on the basis of the involvement of spin‐triplet interactions within ‘dimers’ or higher clusters. Copyright © 2001 John Wiley & Sons, Ltd.
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Η παρούσα ανακοίνωση επικεντρώνεται στην εκλαΐκευση των ιδεών από την οπτική γωνία εκείνων που παράγουν τη λογοτεχνία (συγγραφείς, εκδότες, μεταφραστές) οι οποίοι εκφράζουν μία καλά σχεδιασμένη και συνεπή στρατηγική. Συγκεκριμένα, η πολιτισμική περιοχή που θα εξεταστεί είναι εκείνη της κροατικής και της σερβικής γλώσσας.
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εικ.
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Η παρούσα ανακοίνωση διερευνά τις αιτίες για τις οποίες δεν έχει ακόμη ξεκινήσει η μελέτη της έντυπης λαϊκής λογοτεχνίας στις χώρες τις νοτιοανατολικής Ευρώπης. Ιδιαίτερη αναφορά γίνεται στους λόγους για τους οποίους πρέπει να μελετηθεί αυτό το είδος της λογοτεχνίας.
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Journal URL: http://www.mnimon.gr/
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Journal URL: http://www.springerlink.com/content/110318/
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doi: 10.1055/s-1980-29166
Journal URL: http://www.thieme-chemistry.com/thieme-chemistry/journals/index.shtml
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The levels of AP-1 activity in human breast lesions and in adjacent normal tissue were studied by a gel retardation assay. A thirty nucleotide long consensus oligonucleotide to the adenovirus E3 gene AP-1 sequence (E3AP-1) was end labelled and reacted with nuclear extracts from breast lesions and adjacent normal tissue. A total of 20 tissue extracts (8 pairs of tumor and normal tissue from the same patient and 4 tumors) were examined. All 12 tumor tissues showed elevated levels of AP-1 as compared to the 8 normal tissues. These results suggest that the AP-1 transcription factor may play a role in breast neoplasia.
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doi: 10.1002/mrc.887
AbstractThe radical anions of monosubstituted benzophenones (including 2‐, 3‐ and 4‐methyl‐, 4‐tert‐butyl‐ and 4‐phenylbenzophenone) with lithium, sodium and potassium as countercations in tetrahydrofuran (THF) were studied by paramagnetic solvent 1H NMR shift measurements in the concentration range ca 0.1–1.0 M. In addition to the cation effects, marked positional isomer and substituent effects were found for (1) molar paramagnetism, (2) magnetic state, (3) solubility, (4) structural stability with respect to concentration or addition of cosolvents and (5) rapidity of attainment of their equilibrium structure. The major conclusions which can be drawn are (a) the solvation behavior of the countercation is governed by the anion, (b) an alkyl group in the 4‐position makes the structure of the lithium and sodium monosubstituted benzophenone radical anions concentration dependent and (c) in most cases, alkali metal aromatic ketone radical anions generated by electron transfer from the corresponding naphthalene radical anion attain their equilibrium structure rapidly. The data are interpreted on the basis of the involvement of spin‐triplet interactions within ‘dimers’ or higher clusters. Copyright © 2001 John Wiley & Sons, Ltd.
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citations | 1 | |
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Η παρούσα ανακοίνωση επικεντρώνεται στην εκλαΐκευση των ιδεών από την οπτική γωνία εκείνων που παράγουν τη λογοτεχνία (συγγραφείς, εκδότες, μεταφραστές) οι οποίοι εκφράζουν μία καλά σχεδιασμένη και συνεπή στρατηγική. Συγκεκριμένα, η πολιτισμική περιοχή που θα εξεταστεί είναι εκείνη της κροατικής και της σερβικής γλώσσας.
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εικ.
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Η παρούσα ανακοίνωση διερευνά τις αιτίες για τις οποίες δεν έχει ακόμη ξεκινήσει η μελέτη της έντυπης λαϊκής λογοτεχνίας στις χώρες τις νοτιοανατολικής Ευρώπης. Ιδιαίτερη αναφορά γίνεται στους λόγους για τους οποίους πρέπει να μελετηθεί αυτό το είδος της λογοτεχνίας.
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popularity | Average | |
influence | Average | |
impulse | Average |
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Journal URL: http://www.mnimon.gr/