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  • 1
    Electronic Resource
    Electronic Resource
    Electronic structure of diatomic boron nitride (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 3143-3146 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: BN molecules, isoelectronic with C2, are produced by laser vaporization of boron nitride and trapped in solid neon. Through Fourier-transform absorption and laser-induced fluorescence spectra, three new electronic states are observed. Unlike C2, BN has a triplet ground state (X 3Π), but with an exceedingly low-lying singlet (a 1∑+) state with 15 cm−1〈Te〈182 cm−1. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471079
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  • 2
    Electronic Resource
    Electronic Resource
    Lamellar Phases in Contact with the Lower Consolute Loop of Ionic Surfactant-Water Systems (1995)
    s.l. : American Chemical Society
    Langmuir 11 (1995), S. 4202-4204 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00011a006
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  • 3
    Electronic Resource
    Electronic Resource
    THE SYNTHESIS OF THE STARCH GRANULE (1997)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 48 (1997), S. 67-87 
    Details
    ISSN: 1040-2519
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Notes: Abstract This review describes and discusses the implications of recent discoveries about how starch polymers are synthesized and organized to form a starch granule. Three issues are highlighted. 1. The role and importance of ADPglucose pyrophosphorylase in the generation of ADPglucose as the substrate for polymer synthesis. 2. The contributions of isoforms of starch-branching enzyme, starch synthase, and debranching enzyme to the synthesis and ordered packing of amylopectin molecules. 3. The requirements for and regulation of the synthesis of amylose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.arplant.48.1.67
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  • 4
    Electronic Resource
    Electronic Resource
    The isolation and characterization of novel low-amylose mutants of Pisum sativum L. (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 18 (1995), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Mutants of Pisum sativum L. with seeds containing low-amylose starch were isolated by screening a population derived from chemically mutagenized material. In all of the mutant lines selected, the low-amylose phenotype was caused by a recessive mutation at a single locus designated lam. In embryos of all but one mutant line, the 59 kDa granule-bound starch synthase (GBSSI) was absent or greatly reduced in amount. The granule-bound starch synthase activity in developing embryos of the mutants was reduced but not eliminated. These results provide further evidence that amylose synthesis is unique to GBSSI. Other granule-bound isoforms of starch synthase cannot substitute for this protein in amylose synthesis. Examination of iodine-stained starch granules from mutant embryos by light microscopy revealed large, blue-staining cores surrounded by a pale-staining periphery. In this respect, the low-amylose mutants of pea differ from those of other species. The differential staining may indicate that the structure of amylopectin varies between the core and peripheral regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1995.tb00612.x
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  • 5
    Electronic Resource
    Electronic Resource
    Evidence that amylose synthesis occurs within the matrix of the starch granule in potato tubers (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 22 (1999), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Transgenic potatoes expressing reduced levels of granule-bound starch synthase I (GBSSI) have been used to investigate whether the synthesis of amylose occurs at the surface of the starch granule or within the matrix formed by the synthesis and organization of amylopectin. Amylose in these potatoes is wholly or largely confined to a central region of the granule. Consequently this core region stains blue with iodine whereas the peripheral zone stains red. By making extensive measurements of the relative sizes of the granules and their blue-staining cores in tubers over a range of stages of development, we have established that the blue core increases in size as the granule grows. The extent of the increase in size of the blue core is greater in potatoes with higher levels of GBSSI. These data show that amylose synthesis occurs within the matrix of the granule, and are consistent with the idea that the space available in the matrix may be an important determinant of the amylose content of storage starches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.1999.00437.x
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  • 6
    Electronic Resource
    Electronic Resource
    Two isoforms of the GBSSI class of granule-bound starch synthase are differentially expressed in the pea plant (Pisum sativum L.) (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 20 (1997), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In addition to the GBSSI isoform of starch synthase described previously, the pea plant contains a second, granule-bound isoform, GBSSIb. GBSSI is abundant in pea embryos and Rhizobium root nodules, is present at low levels in pods and is absent from leaves. Mutations at the lam locus eliminate GBSSI from all of these organs. GBSSIb is present in pods, leaves and nodules and is unaffected by mutations at the lam locus. GBSSI and GBSSIb are very similar in molecular mass, primary sequence, activity and antigenic properties. GBSSIb, like GBSSI, can synthesize amylose in the presence of malto-oligosaccharides in isolated starch granules. However, its role in vivo is unclear. The lam mutation eliminates amylose from the starch of embryos but does not affect the relatively small amounts of amylose-like material in the starch of pods, leaves and nodules. The significance of these results for understanding of the regulation of amylose synthesis is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.1997.d01-48.x
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  • 7
    Electronic Resource
    Electronic Resource
    Studies of platinum electroplating baths: Part V: Solutions derived from Pt(NO2)42− in aqueous acid (1997)
    Springer
    Journal of applied electrochemistry 28 (1997), S. 18-26 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract When Pt(NO2)42− is dissolved in methanesulphonic acid, it is shown that nitrite ions are displaced by water ligands and the extent of ligand substitution depends on temperature, length of the thermal treatment and the concentration of acid. Although the final nitrite ligand is difficult to displace, a solution containing Pt(NO2)(H2O)3+ as the dominant species may be formed, and this solution (Pt concentration 6gdm−3) provides the basis of a reasonable Pt plating bath. At a temperature of 343K, good quality coatings can be obtained with current densities in the range 1–15mAcm−2 although the current efficiencies are low (10–15%) because reduction of the nitrite ion competes with Pt deposition on the freshly formed Pt surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003237532258
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  • 8
    Electronic Resource
    Electronic Resource
    Multi-instrument probing of the polar ionosphere under steady northward IMF (1999)
    Springer
    Annales geophysicae 18 (1999), S. 90-98 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (polar ionosphere) ; Magnetospheric physics (magnetosphere-ionosphere interactions; polar cap phenomena)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Observations are presented of the polar ionosphere under steady, northward IMF. The measurements, made by six complementary experimental techniques, including radio tomography, all-sky and meridian scanning photometer optical imaging, incoherent and coherent scatter radars and satellite particle detection, reveal plasma parameters consistent with ionospheric signatures of lobe reconnection. The optical green-line footprint of the reconnection site is seen to lie in the sunward plasma convection of the lobe cells. Downstream in the region of softer precipitation the reverse energy dispersion of the incoming ions can be identified. A steep latitudinal density gradient at the equatorward edge of the precipitation identifies the general location of an adiaroic boundary, separating the open field lines of polar lobe cells from the closed field of viscous-driven cells. Enhancements in plasma density to the south of the gradient are interpreted as ionisation being reconfigured as it is thrust against the boundary by the antisunward flow of the viscous cells near noon. Each of the instruments individually provides valuable information on certain aspects of the ionosphere, but the paper demonstrates that taken together the different experiments complement each other to give a consistent and comprehensive picture of the dayside polar ionosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-000-0090-2
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  • 9
    Electronic Resource
    Electronic Resource
    Identification of multiple isoforms of soluble and granule-bound starch synthase in developing wheat endosperm (1995)
    Springer
    Planta 196 (1995), S. 256-265 
    Details
    ISSN: 1432-2048
    Keywords: Endosperm (wheat) ; Starch granule ; Starch synthase (isoforms) ; Triticum (starch synthase)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have investigated the nature and locations of isoforms of starch synthase in the developing endosperm of wheat (Triticum aestivum L.). There are three distinct granule-bound isoforms of 60 kDa (the Waxy gene product), 77 kDa and 100–105 kDa. One of these isoforms, the 77-kDa protein, is also present in the soluble fraction of the endosperm but it contributes only a small proportion of the total soluble activity. Most of the soluble activity is contributed by isoforms which are apparently not also granule-bound. The 60-kDa and 77kDa isoforms of wheat are antigenically related to isoforms of very similar size in the developing pea embryo, but the other isoforms in the endosperm appear to have no counterparts in the pea embryo. The significance of these results in terms of the diversity of isoforms of starch synthase and their locations is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201382
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchung von Obst, Gemüse and Konserven (1939)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 116 (1939), S. 451-453 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01452920
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