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Digitale Medien

Subfamilies of histone H3 and H4 genes are located on most, possibly all of the chromosomes in maize (1992)

Chaubet, N. ; Philipps, G. ; Gigot, C. ; [weitere]

Springer

Theoretical and applied genetics 84 (1992), S. 555-559

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ISSN: 1432-2242

Schlagwort(e): Maize ; H3-H4 multigenic families ; Chromosomic localization ; Monosomics

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary It has been previously shown that in the genome of maize the multiple copies of the histone H3 and H4 multigenic families are organized into eight to ten subfamilies each containing a variable number of copies. Each subfamily is characterized by a specific proximal environment and thus can be revealed by blot-hybridization with its specific 5′ probe. Restriction fragment length polymorphism (RFLP) combined with monosomic analysis was used to localize several H3 and H4 subfamilies on maize chromosomes. H3 and H4 genes were found to be located on most, possibly all of the chromosomes, revealing a remarkably dispersed organization of these multigenic families.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00224151

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Digitale Medien

The determination of organotin compounds in fruit juices using gas chromatography-atomic absorption spectrometry (1992)

Forsyth, D S ; Weber, D ; Barlow, L

New York, NY [u.a.] : Wiley-Blackwell

Applied Organometallic Chemistry 6 (1992), S. 579-585

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ISSN: 0268-2605

Schlagwort(e): Butyltin ; cyclohexyltin ; octyltin ; phenyltin ; fruit juice ; analysis ; GC MS ; GC AA ; Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A method for extracting butyl-, cyclohexyl-, octyland phenyl-tin compounds in fruit juices was developed using 0.05% tropolone in 25% pentane/diethyl ether. Methyl derivatives formed by Grignard reaction were quantified by gas chromatography-atomic absorption spectrometry. Several fruit juices contained low ng cm-3 levels of butyl- and octyl-tins. Gas chromatography-mass spectrometry, used for the confirmation of the butyl- and octyl-tins, also detected phenyl- and cyclohexyl-tin compounds at levels below the GC AA detection limits (0.03-0.05 ng Sn cm-3).

Zusätzliches Material: 4 Ill.