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  • 1
    Electronic Resource
    Electronic Resource
    Potentiometric digoxin antibody measurements with antigen-ionophore based membrane electrodes (1984)
    s.l. : American Chemical Society
    Analytical chemistry 56 (1984), S. 801-806 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00268a048
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  • 2
    Electronic Resource
    Electronic Resource
    The Visual System and “Neuronal Specificity” (1972)
    [s.l.] : Nature Publishing Group
    Nature 237 (1972), S. 375-378 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To explain how neurones make the correct connexions during development and growth, Sperry put forward his hypothesis of neuronal specificity, in which neurones are recognized by individual chemical labels. The basis for this specificity is still unclear; but recent evidence suggests that it may be ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/237375a0
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  • 3
    Electronic Resource
    Electronic Resource
    Retinotectal mismatch: a serendipitous experimental result (1975)
    [s.l.] : Nature Publishing Group
    Nature 253 (1975), S. 445-446 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The right eye had been removed at stage 29 (ref. 7), before the eye had differentiated; and the animal grew up with only one eye, the left, which innervated the right optic tectum. Two months after metamorphosis the left optic nerve was exposed and cut in the region where the optic chiasma would ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/253445a0
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  • 4
    Electronic Resource
    Electronic Resource
    The elucidation of the mechanism of folate catabolism in the rat
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 71 (1976), S. 1017-1024 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(76)90756-7
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  • 5
    Electronic Resource
    Electronic Resource
    The localization sequence inK-theory (1995)
    Springer
    K-Theory 9 (1995), S. 577-589 
    Details
    ISSN: 1573-0514
    Keywords: right denominator set ; localization sequence ; projective dimension ; transfer homomorphism ; skew polynomial ring ; Euclidean domain ; integral quaternions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The localizationR∑ of a ringR with respect to a right denominator set Σ of non-zero-divisors is shown to induce inK-theory the exact localization sequence $$K_1 (R) \to K_1 (R_\Sigma )\xrightarrow{\partial }K_0 (\mathcal{H}) \to K_0 (R) \to K_0 (R_\Sigma )$$ where $$\mathcal{H}$$ is the category of finitely presented Σ-torsionR-modules of projective dimension 1. An explicit construction for ∂ is given, generalizing that previously worked out by Bass when Σ is central. Application is made to work of Farrell and Hsiang on skew polynomial rings, and to the Whitehead groups of those division rings that occur as fields of fractions of noncommutative Euclidean domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00998131
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  • 6
    Electronic Resource
    Electronic Resource
    Coassembly of K V LQT1 and minK (IsK) proteins to form cardiac I KS potassium channel (1996)
    [s.l.] : Nature Publishing Group
    Nature 384 (1996), S. 80-83 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The previously described KVLQT1 complementary DNA pre-dicted a protein with six hydrophobia membrane-spanning a-helices (S1-S6), and a typical K+ channel pore-signature sequence11. However, this cDNA seemed to be lacking the amino-terminal domain and was not able to undergo functional expres-sion. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/384080a0
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  • 7
    Electronic Resource
    Electronic Resource
    Normal maturation involves systematic changes in binocular visual connections in Xenopus laevis (1986)
    [s.l.] : Nature Publishing Group
    Nature 322 (1986), S. 258-261 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the late larval Xenopus the two eyes face laterally and there is no fronto-superior binocular visual field. As metamor-phic climax approaches, changes in skull shape produce frontal and dorsal migration of the two eyes. This movement persists into post-metamorphic and adult life. Optical methods ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/322258a0
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  • 8
    Electronic Resource
    Electronic Resource
    Structural Development During Thermal Fractionation of Polyethylenes (2000)
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 245-255 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; metallocene ; polyethylenes ; SAXS ; synchrotron radiation ; thermal fractionation ; WAXD ; Ziegler-Natta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In this study, the stepwise isothermal crystallization or thermal fractionation of Ziegler—Natta and metallocene based polyethylenes (ZN-PE and m-PE) with two kinds of branch lengths (ethyl and hexyl) and branch compositions were studied using simultaneous synchrotron small-angle X-ray scattering (SAXS)/wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). The crystal long period and the invariant were determined by SAXS, and the variations of crystal unit cell parameters and the degree of crystallinity were determined by WAXD. The arithmetic mean length (Ln), the weightedmean length (Lw) and the broadness index (Lw/Ln) of the studied polyethylenes were previously determined by DSC. Results from these studies were interpreted using the model of branch exclusion, which affects the ability of the chain-reentry into the crystal phase. Multiple SAXS peaks and step-change in crystallinity change (WAXD) were seen during heating, which corresponded well with the crystal thickness distribution induced by stepwise crystallization. The effects of the heterogeneity of the 1-olefin branch length and the distribution on the crystal long period and the invariant as well as the degree of crystallinity were discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010100432613
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  • 9
    Electronic Resource
    Electronic Resource
    Thermal Properties of the Polyamide from 2-Methylpentamethylenediamine and Dodecanedioic Acid (2000)
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 519-530 
    Details
    ISSN: 1572-8943
    Keywords: branched diamine ; crystal structures ; dielectric properties ; dodecanedioic acid ; mechanic properties ; 2-methylpentamethylenediamine ; modulated DSC ; polyamides ; polymorphism ; SAXS ; Synchrotron X-ray ; WAXD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The polyamide from 2-methylpentamethylenediamine and dodecanedioic acid (MPMD-12) has been studied by differential scanning calorimetry, dynamic mechanical analysis, dielectric analysis, X-ray crystallography, and simultaneous small and wide-angle X-ray scattering using synchrotron radiation. The polymer exhibits polymorphism which is shown to be associated with the incorporation of the branched diamine. At relatively low temperatures, the crystal structure is similar to the gamma form which has been found in many other polyamides. At higher temperatures, a new delta form appears in which the diamine moiety adopts a bent conformation. In this form, the chains follow a zig-zag pattern with two chemical repeats units per crystallographic repeat with a shortening of about 10% along the c-axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010101927587
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  • 10
    Electronic Resource
    Electronic Resource
    Polymorphism in Polyamide of Dytek®-A and Dodecanedioic Acid (1999)
    Springer
    Journal of thermal analysis and calorimetry 56 (1999), S. 1133-1140 
    Details
    ISSN: 1572-8943
    Keywords: branched diamine ; melting ; polyamides ; polymorphism ; transformation ; WXRD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Our X-ray work of Dytek®-A, 2-methyl-pentamethylenediamine, containing polyamides shows polymorphism, whereas the polyamides with linear diamines do not. The polyamide of Dytek®-A and dodecanedioic acid, MPMD-12, is singled out for discussion and compared with the unbranched analogs of polyamides 6,12 and 5,12. Due to the presence of the -CH3 side group in the 2-position of the diamine, the polyamide MPMD-12 exhibits two stable crystal conformations. The new δ polymorph is not seen in linear polyamides 6,12 and 5,12. Studies by DSC polyamide MPMD-12 clearly illustrates at least two crystal forms, γ and δ, coexisting over a wide temperature range, and the isolation of each phase is possible by controlling temperature and time. The DMA modulus in the temperature region between the glass transition (or alpha relaxation) and melting transition shows strong dependence on the thermal history as demonstrated in a study of crystallization kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010105028316
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