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  • 1
    Electronic Resource
    Electronic Resource
    The holographic view of argument (1987)
    Springer
    Argumentation 1 (1987), S. 89-102 
    Details
    ISSN: 1572-8374
    Source: Springer Online Journal Archives 1860-2000
    Topics: Linguistics and Literary Studies
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00127121
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  • 2
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    WINTER CLIMATIC RESORTS OF THREE CONTINENTS, THE (1887)
    New York, N.Y. : Periodicals Archive Online (PAO)
    Harper's. 75 (1887:June/Nov.) 868 
    Details
    ISSN: 0017-789X
    Topics: General, Interdisciplinary
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5128-1887-075-00-000092
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  • 3
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    Capsule Commentaries (Book Review) (1986)
    Menasha, Wis. : Periodicals Archive Online (PAO)
    The Accounting Review. 61:1 (1986:Jan.) 209 
    Details
    ISSN: 0001-4826
    Topics: Economics
    Description / Table of Contents: BOOK REVIEWS, Harvey S. Hendrickson, Editor
    Notes: Departments
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5030-1986-061-01-000028
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanical twinning of plagioclase in a deformed meta-anorthosite — the production of M-twinning (1986)
    Springer
    Contributions to mineralogy and petrology 92 (1986), S. 44-56 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Mechanical twins on both the Albite and Pericline laws are well developed on an optical scale in basic plagioclase from the Harris meta-anorthosite where the rock is affected by closely spaced shear fractures associated with pseudotachylite formation. In some cases the twinning is accompanied by kinking or intracrystalline fractures. The twins may be periodic and form a ladder structure and sometimes appear to intersect on an optical scale showing structures which very closely resemble those seen in microcline. Both Albite and Pericline twins are lenticular as observed by TEM, but isolated twin tips were rarely seen. No dislocations are associated with the twin tips. The twins in the optically observed ladder structure (when thicker than ∼2μm), have themselves a very fine secondary ladder structure, consisting of periodic (200–600 nm) lenticular twins which impinge on the perpendicular twin wall. Intersecting twins were also observed and where two sets of equally thick twins intersect, M-twinning develops as shown by selected-area diffraction. The twin formation is analyzed in terms of the plagioclase structure and a coherent model for twin nucleation proposed. True twins can develop in plagioclase only if the Al/Si distribution is unchanged or nearly so after deformation. Mechanical twinning is quite easy in low plagio-clases between An100 and about An30 which have P¯1 or I¯1 lattices or domains with I¯1-type structures. Only one kind of nucleus can develop coherently in a single crystal, but it may grow to give either an Albite or a Pericline twin. Periodic nucleation and growth give complex textures. The qualitative variation of the twin energy as a function of the obliquity is given for different twin shapes and degrees of Al/Si order. M-twinning arises mechanically by coherent growth and interference of the strain fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373962
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  • 5
    Electronic Resource
    Electronic Resource
    Sidewall crystallization in the Klokken intrusion: zoned ternary feldspars and coexisting minerals (1988)
    Springer
    Contributions to mineralogy and petrology 98 (1988), S. 431-443 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The syenitic layered series in the Klokken intrusion is surrounded by a zone (∼500 m thick) of nearly structureless unlaminated syenite followed outwards by a zone of vertically banded gabbro (≲200 m thick) at the outer rim. The unlaminated syenite is intrusive into the gabbro and develops a thin (∼2 m) transition zone of syenodiorite at the contact. A traverse across the vertical transition zone and inwards towards the layered series was sampled with a portable drill. Mafic silicates (olivine, clinopyroxene, biotite) show inward evolution in Fe/(Fe+Mg) across the syenodiorite-unlaminated syenite zones. Feldspars change rapidly across the syenodiorite zone from rocks dominated by plagioclase, in some cases together with two alkali feldspars, one a mesoperthite or cryptomesoperthite, the other a cryptoperthite, to rocks in which plagioclase is seen only rarely as cores to cryptomesoperthitic alkali feldspar crystals. Plagioclase is absent from the layered series. Alkali feldspars occurring in pairs have bulk compositions on solvus isotherms in the Or-Ab-An ternary system, estimated at 950° C in a syenogabbro and 910° C in a syenodiorite, at ∼1 kbar. The more calcic liquids from which they crystallized fractionated on paths that intersected the two- feldspar surface, whereas the more syenitic members crystallized from liquids which terminated crystallization in the one- feldspar field at ≲900° C. Plagioclases evolve from calcic andesine in syenodiorites, to very rare sodic oligoclase in the most evolved unlaminated syenites. The boundaries between plagioclase cores and alkali feldspar rims, which are usually optically abrupt, involve complex mixed zones on the μm -scale, consistent with arrested reaction between plagioclase primocrysts and crystallizing syenitic liquid. Ternary liquidus-solidus relationships are in qualitative agreement with this interpretation. The syenodiorites are cumulates produced during sidewall crystallization of a trachytic magma against a gabbroic chamberlining. This magma changed little in bulk composition as it evolved, giving rise to the unlaminated syenites by further sidewall crystallization. Water build- up in this liquid probably caused a change in style of chamber filling, giving rise to the layered series by bottom accumulation. Microtextures in the zoned feldspars are described in an accompanying paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372363
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  • 6
    Electronic Resource
    Electronic Resource
    Zoned ternary feldspars in the Klokken intrusion: exsolution microtextures and mechanisms (1988)
    Springer
    Contributions to mineralogy and petrology 98 (1988), S. 444-454 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The microtextures developed during relatively slow cooling as a function of bulk composition in zoned ternary feldspars from syenodiorites and syenites in the Klokken intrusion, described in the preceding paper, were determined by TEM and their origin and evolution deduced. The feldspars normally have a plagioclase core and an alkali feldspar rim; cores become smaller and rims larger and the An content of both decrease with distance from the contact of the intrusion. The following microtextural sequence was observed. The inner plagioclase cores are homogeneous oligoclase-andesine with Albite growth twins only, but are crypto-antiperthitic towards the outer core. At first small platelets of low sanidine a few nanometres thick and up to ∼10 nm long occur sporadically only on Albite-twin composition planes. With further increase in bulk Or they are homogeneously distributed in the plagioclase. Thicker, through-going plates in platelet-free areas are found, which induce Albite twins in the surrounding plagioclase. The microtextures in the rims are regular cryptomesoperthitic, with (¯601) lenses or lamellae, depending on the bulk Or-content, of low sanidine in Albite-twinned low oligoclase-andesine. Albite and Pericline twins in plagioclase in an M-twin relationship, together with lenticular low sanidine, were found in only one small area. The overall diffraction symmetry of the mesoperthites is monoclinic, showing that exsolution started in a monoclinic feldspar, whereas that of the antiperthites is triclinic. The intermediate zone between the core and rim is more complex and microtextures vary over distances of a few micrometres. The cryptomesoperthites are very regular where Or-rich and probably arose by spinodal decomposition. The platelets in the outer cores arose by heterogeneous nucleation on twin composition planes and by homogeneous nucleation elsewhere. Near the intermediate zone they coarsened to give larger plates which induced Albite-twins in the plagioclase. Because of the zoning, microtextures that were initiated in areas of given composition, can propagate laterally into zones of different composition. A diagram is given showing the relationship between ternary bulk composition and the microtexture developed in coherent perthitic alkali feldspars and plagioclases from slowly-cooled rocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372364
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular cloning of human telomeres in yeast (1989)
    [s.l.] : Nature Publishing Group
    Nature 338 (1989), S. 774-776 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Human telomeres contain the sequence (TTAGGG)n. This sequence is identical to the most prominent components of both the a-satellite DNA of guinea pig5 and the HS-a-satellite of DNA of kangaroo rat6. These satellite DNA sequences can be purified from the bulk of the genomic DNA by isopycnic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/338774a0
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  • 8
    Electronic Resource
    Electronic Resource
    Long-range restriction site mapping of mammalian genomic DNA (1986)
    [s.l.] : Nature Publishing Group
    Nature 322 (1986), S. 477-481 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To construct long-range maps of genomic DNA, enzymes are needed which cut the DNA infrequently. Sites for enzymes which have a 6-base-pair (bp) recognition sequence composed entirely of inter-strand OG base pairs and which include one or more CpG dinucleotides (OG enzymes) are rare in the mammalian ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/322477a0
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  • 9
    Electronic Resource
    Electronic Resource
    Hypervariable telomeric sequences from the human sex chromosomes are pseudoautosomal (1985)
    [s.l.] : Nature Publishing Group
    Nature 317 (1985), S. 687-692 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Pairing of human X and Y chromosomes during meiosis initiates within the so–called pairing region at the telomeres or the chromosome short arms. Using DNA from the Y chromosome we found sequence homology in the pairing region of the human X and Y chromosomes. This DNA is telomeric, contains ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/317687a0
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  • 10
    Electronic Resource
    Electronic Resource
    Monzo-anorthosite from the Tagueï ring-complex, Aïr, Niger: a hybrid rock with cumulus plagioclase and an infiltrated granitic intercumulus liquid? (1987)
    Springer
    Contributions to mineralogy and petrology 95 (1987), S. 32-43 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract An unusual hybrid rock composed of cumulus plagioclase with the interstices occupied by abundant quartzo-feldspathic material occurs in the Tagueï ring complex, Niger. The monzo-anorthosite consists of about 75% plagioclase in large tabular to elongate crystals with interstices occupied in two stages, firstly by clinopyroxene, titanomagnetite and apatite and then by an intergrowth of quartz and alkali feldspar associated with brown-green amphibole and zircon. Secondary green amphibole, chlorite, epidote and calcite may occur. Four stages in the crystallization history were identified: (1) Cumulus stage represented by the cores of the plagioclase laths (An56-An66 with reversed oscillatory zoning) and rare clinopyroxene (T ∼1,150° C), (2) Early intercumulus stage with a wide overgrowth zone on plagioclase (An62-An15 with oscillatory zoning and increase in Or), clinopyroxene, apatite, titanomagnetite (T ∼1,150-1,050° C), (3) Late intercumulus stage with alkali feldspar, quartz, opaque oxide, brown-green amphibole, apatite and zircon (T ∼750-700° C). Alkali feldspar gave cryptoperthite on further cooling. (4) Deuteric stage with development of turbidity in the alkali feldspar and plagioclase rims, and formation of patch perthite with microcline and secondary minerals (T ∼400° C). The contrast in mineralogy, the large gap of ∼300° C between the early and late cumulus stages and the great abundance of quartz and alkali feldspar (∼20%) suggest that the late-stage liquid of granitic composition which filled the interstices was not a simple residual liquid which crystallized in situ. From chemistry (including REE) it is almost identical to the later radial granite dykes. From gravity measurements the intrusion has the form of a pipe with less dense rocks below the present exposure level. We propose that a pulse of granite magma rose within the pipe just before complete consolidation of the leucogabbro and replaced by infiltration the denser residual intercumulus liquid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00518028
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