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  • Elsevier  (14)
  • Springer  (9)
  • American Association for the Advancement of Science (AAAS)  (2)
  • Oxford University Press  (2)
  • Hindawi  (1)
  • 1985-1989  (28)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Siderite — a diagenetic product of an ammonite shell (1987)
    Springer
    Naturwissenschaften 74 (1987), S. 445-446 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446103
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  • 2
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    Siderite ? a diagenetic product of an ammonite shell (1987)
    Springer
    Details
    Publication Date: 1987-09-01
    Print ISSN: 0028-1042
    Electronic ISSN: 1432-1904
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    ESR study of Fe(III) and Cr(III) hydroxides (1989)
    Springer
    Naturwissenschaften 76 (1989), S. 172-173 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366401
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  • 4
    Electronic Resource
    Electronic Resource
    In situ localization of the transcripts of a homeobox gene in the honeybee Apis mellifera L. (Hymenoptera) (1988)
    Springer
    Development genes and evolution 197 (1988), S. 269-274 
    Details
    ISSN: 1432-041X
    Keywords: Apis mellifera ; Homeobox genes ; Dfd ; In situ hybridization ; Blastoderm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have isolated and characterized a homeoboxcontaining gene from the honeybee Apis mellifera. Its homeobox region shows a high degree of sequence similarity to the homeobox of the Drosophila gene Deformed (Dfd). At the DNA level 82% of the basepairs are the same, whereas the putative amino acid sequences are identical between the bee and the fruitfly genes. Similarity is also present 5′ and 3′ to the homeobox. Using this isolate as a probe we have performed in situ hybridization on sections from blastoderm-stage embryos of the honeybee Apis mellifera. In early blastoderm stages we found a rather irregular pattern of labelled nuclei. In middle stages we found silver grains over each nucleus and also over the cytoplasm in a belt of blastoderm cells in the prospective gnathal region. These results indicate that the Deformed genes from honeybee and fruitfly are homologous both with respect to their DNA sequence and their spatial and temporal pattern of expression during embryogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380020
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  • 5
    Electronic Resource
    Electronic Resource
    Excision of copia element in a revertant of the white-apricot mutation of Drosophila melanogaster leaves behind one long-terminal repeat (1985)
    Springer
    Molecular genetics and genomics 199 (1985), S. 1-6 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The spontaneous mutation white-apricot (wa) in Drosophila melanogaster has a considerably highter eye colour than the wild-type, and is caused by the insertion of a copia transposable element into a small intron of the white gene. We have analyzed an X-ray induced w a revertant (w aR59K1), whose eye pigmentation is incompletely restored, by in situ hybridization, Southern blotting and sequencing analysis. At the site where copia had originally inserted, we found one long terminal repeat of copia, flanked by a 5 bp duplication with the same polarity as the direction of transcription of the white locus. These results suggest that the w a reversion is due to homologous recombination between the two long terminal repeats of copia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327501
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  • 6
    Electronic Resource
    Electronic Resource
    On the nature of Romanowsky-Giemsa staining and the Romanowsky-Giemsa effect. I. Model experiments on the specificity of Azures B-Eosin Y stain as compared with other thiazine dye-Eosin Y combinations (1985)
    Springer
    Journal of molecular histology 17 (1985), S. 263-289 
    Details
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary After incorporation into a polyacrylamide matrix, the biopolymers DNA, RNA, heparin, hyaluronic acid, collagen and the synthetic polymers poly(U) and poly(A, U) were stained with the pure thiazine dyes, Methylene Blue, the Azures and Thionin alone and combined with Eosin Y. Satisfactory spectrophotometric agreement was obtained between the staining reactions of the biopolymers in the artificial matrix and those in their natural surroundings. This was especially true with respect to the specificity of the Azure B-Eosin Y dye-pair, which is based on the generation, on suitable substrates, of a purple colour, the Romanowsky-Giemsa effect (RGE), with an absorbance maximum near 550 nm. In the model experiments, DNA, heparin, hyaluronic acid and collagen were found to be RGE-positive and poly(U), poly(A, U) and RNA RGE-negative. A theory of RGE is proposed which complies with the new and earlier observations: after saturation of available anionic binding sites and aggregate formation by Azure B, electron donor acceptor complexes are formed between Eosin Y and Azure B via hydrogen-bridge formation of the aminosubstituent proton of Azure B and between Eosin Y and the biopolymer surface. Charge-transfer complex formation may also account for the qualitative identity of Azure B-Eosin Y and Azure A-Eosin Y spectra of substrates, which are coloured purple. Quantitatively, Azure A-Eosin Y is less efficient in giving RGE. The generation of RGE is time-dependent. Equilibrium staining is attained after about 120 h. The implications of the results for the biological application of Romanowsky-Giemsa staining are discussed briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01004591
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  • 7
    Electronic Resource
    Electronic Resource
    Detection of a metastable magnetic phase in the La1.85Ba0.15CuO4−y system (1987)
    Springer
    Journal of low temperature physics 68 (1987), S. 419-425 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have made samples of La1.85Ba0.15CuO4−y with varying heat treatments. We have measured their dc magnetization and electron paramagnetic resonance, and have examined them by electron microscopy and electron diffraction. For samples annealed only a few hours, cooling the material below 5 K causes a magnetic transition and a thermal hysteresis. These observations, taken with the EPR data, suggest a possible spin-glass or ferromagnetic phase. Annealing samples in an oxygen atmosphere appears to remove that magnetic phase. For the phase with the K2NiF4 structure, no superlattice spots are seen in electron diffraction at room temperature or at 77 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00682306
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  • 8
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    Work function dependence of the Li(2p) formation in slow collisions of Li atoms with partially cesiated tungsten surfaces (1986)
    Elsevier
    Details
    Publication Date: 1986-05-01
    Print ISSN: 0167-2584
    Electronic ISSN: 1878-1047
    Topics: Physics
    Published by Elsevier
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  • 9
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    Homeo boxes in the study of development (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-06-05
    Description: The body plan of Drosophila is determined to a large extent by homeotic genes, which specify the identity and spatial arrangement of the body segments. Homeotic genes share a characteristic DNA segment, the homeo box, which encodes a defined domain of the homeotic proteins. The homeo domain seems to mediate the binding to specific DNA sequences, whereby the homeotic proteins exert a gene regulatory function. By isolating the normal Antennapedia gene, fusing its protein-coding sequences to an inducible promoter, and reintroducing this fusion gene into the germline of flies, it has been possible to transform head structures into thoracic structures and to alter the body plan in a predicted way. Sequence homologies suggest that similar genetic mechanisms may control development in higher organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gehring, W J -- New York, N.Y. -- Science. 1987 Jun 5;236(4806):1245-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2884726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Blastoderm/ultrastructure ; Drosophila/embryology/*genetics ; Embryonic and Fetal Development ; *Genes, Homeobox ; Mutation ; Ovum/ultrastructure
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Expression and function of the segmentation gene fushi tarazu during Drosophila neurogenesis (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-01-08
    Description: Segmentation genes control cell identities during early pattern formation in Drosophila. One of these genes, fushi tarazu (ftz), is now shown also to control cell fate during neurogenesis. Early in development, ftz is expressed in a striped pattern at the blastoderm stage. Later, it is transiently expressed in a specific subset of neuronal precursor cells, neurons (such as aCC, pCC, RP1, and RP2), and glia in the developing central nervous system (CNS). The function of ftz in the CNS was determined by creating ftz mutant embryos that express ftz in the blastoderm stripes but not in the CNS. In the absence of ftz CNS expression, some neurons appear normal (for example, the aCC, pCC, and RP1), whereas the RP2 neuron extends its growth cone along an abnormal pathway, mimicking its sibling (RP1), suggesting a transformation in neuronal identity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doe, C Q -- Hiromi, Y -- Gehring, W J -- Goodman, C S -- New York, N.Y. -- Science. 1988 Jan 8;239(4836):170-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2892267" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Drosophila melanogaster/*embryology/genetics ; Gene Expression Regulation ; Genes, Homeobox ; Morphogenesis ; Nervous System/*embryology ; Neuroglia/cytology/physiology ; Neurons/cytology/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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