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  • 1
    ISSN: 1432-0827
    Keywords: Vitamin D metabolites ; Calcitriol ; Bone resorption ; Bone collagen synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary We compared the effects of four vitamin D metabolites, 1α,25 dihydroxy vitamin D3 (1α,25(OH)2D3), 1α hydroxy vitamin D3 (1αOH D3), 25 hydroxy vitamin D3 (25 OH D3), and 24R,25 dihydroxy vitamin D (24R,25(OH)2D3) on resorption and collagen synthesis in fetal rat bone maintained in organ culture. Resorption was quantitated by measuring the release of previously incorporated45Ca from long bone shafts of 19-day fetal rats, and collagen synthesis was assessed by measuring the incorporation of3H-proline into collagenase digestible protein (CDP) in calvaria from 21-day fetal rats. All four compounds stimulated bone resorption and inhibited collagen synthesis, but 1α,25(OH)2D3 was approximately 1000 times more potent in both organ culture systems. Although the differences were small among the other three compounds, the order of potency was 1αOH D3〉25 OH D3≧24R,25(OH)2D3. These results suggest that the receptor for 1α25(OH)2D3 in both bone resorbing and bone forming cells has similar affinities for several vitamin D metabolites.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 618-618 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have tried to simplify, and at the same time to increase the accuracy of these experiments by a radiochemical technique. The use of radioactive mirrors in free radical studies is not new. Leighton and Mortensen2 employed invisible mirrors of radium D and E to detect very low concentrations of ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical quarterly 48 (1998), S. 311-313 
    ISSN: 0009-8388
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Notes: Horace had good reason to know these lines (quoted by Diodorus Siculus 8.21) since they come from the foundation oracle of one of his favourite places, Tarentum, delivered to the founder Phalanthus whom Horace mentions in Odes 2.6.11–12, ‘regnata petam Laconi | rura Phalantho’. It is a regular feature of such oracles that, however absurd and impossible they may seem, they will be fulfilled in a quite unexpected way.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical quarterly 47 (1997), S. 578-582 
    ISSN: 0009-8388
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Notes: Michael Choniates (c. 1138–c. 1222), a pupil of Eustathius of Thessalonica, who was Greek Orthodox Metropolitan of Athens for some 25 years up to that city's capture by Frankish crusaders in a.d. 1205, is best known to classical scholars as the possessor of probably the last complete copy of Callimachus' Hecale and Aetia. He had brought with him from Constantinople many books of all kinds, and added to his collection when in Athens. Although an immense task, it would be well worth trying to identify all Michael's classical allusions, as an indication of how much ancient Greek literature was still available just before Constantinople too succumbed to the crusaders.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical quarterly 48 (1998), S. 561-564 
    ISSN: 0009-8388
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Notes: It is appropriate that this speech should be full of quotations from Roman drama. These offered the jurymen some compensation for their enforced absence from the theatrical performances of the Ludi Megalenses; on the very day (4 April 56 b.c.) when Cicero demolished Clodia's reputation in court, her brother Clodius, as curule aedile, was nearby presiding at the opening of the Ludi. Brother and sister both had a strong interest in the stage; in Pro Sestio 116 Clodius is described as ‘ipse ille maxime ludius, non solum spectator sed actor et acroama, qui omnia sororis embolia novit’. In Pro Caelio 18 Cicero takes up Crassus' quotation of Ennius' Medea, ‘utinam ne in nemore Pelio ...’ ends by calling Clodia ‘the Medea of the Palatine’. Clodius is made to address his sister in a trochaic septenarius, ‘quid clamorem exorsa verbis parvam rem magnam facis?’. A harsh parent is represented by a quotation from Caecilius, a gentle one by Micio from Terence's Adelphoe. Clodia herself is called (64) ‘veteris et plurimarum fabularum poetriae’—this phrase should not be taken to mean that she had actually written plays—and in 65 the whole affair at the baths is likened to a mime with no satisfactory conclusion (‘mimi ... exitus in quo clausula non invenitur’).
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical review 47 (1997), S. 414-415 
    ISSN: 0009-840X
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical review 46 (1996), S. 26-27 
    ISSN: 0009-840X
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical review 44 (1994), S. 12-13 
    ISSN: 0009-840X
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical review 44 (1994), S. 14-15 
    ISSN: 0009-840X
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical quarterly 46 (1996), S. 305-308 
    ISSN: 0009-8388
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Notes: Some scholars have seen in ‘fulminat’ an allusion to Callimachus' βροντ⋯ν οὐκ ⋯μ⋯ν, ⋯λλ⋯ Δι⋯c (fr. 1.20 Pfeiffer), and that is reasonable enough, since Virgil contrasts the warlike fulminations of Octavian with mocking disparagement of his own very different lifestyle (563–4 ‘illo Vergilium me tempore dulcis alebat Parthenope studiis florentem ignobilis oti’). But it may have escaped attention that Virgil seems to be imitating some lines by another Hellenistic poet, Rhianus (mid to late third century B.C.); the parallel has thought-provoking implications.
    Type of Medium: Electronic Resource
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