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  • Articles  (16)
  • Column liquid chromatography  (8)
  • C-banding  (5)
  • 15
  • 34A45
  • 41A21
  • minimum degrees
  • rationality
  • Springer  (16)
  • 1
    Electronic Resource
    Electronic Resource
    Analysis of the soluble proteins in grape musts by reversed-phase HPLC (1991)
    Springer
    Chromatographia 32 (1991), S. 463-465 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Grape musts ; Soluble proteins ; Simplex optimization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Reversed-phase high performance liquid chromatography (RP-HPLC) was applied to the analysis of the soluble proteins from grape musts, with protein separation based on hydrophobicity. The initial percentage and rate of increase of organic modifier were optimized using the Modified Simplex method. Both the qualitative and quantitative data in the chromatograms yielded information on the variety origin of grape musts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327980
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  • 2
    Electronic Resource
    Electronic Resource
    The meiotic pairing of nine wheat chromosomes (1984)
    Springer
    Theoretical and applied genetics 69 (1984), S. 193-198 
    Details
    ISSN: 1432-2242
    Keywords: C-banding ; Heterochromatin ; Meiosis ; Common wheat ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The meiotic identification of nine pairs of chromosomes at metaphase I of meiosis of Triticum aestivum (B genome, 4A and 7A) has been achieved using a Giemsa C-banding technique. As a result, the analysis of the pairing of each chromosome arm in disomic and monosomic intervarietal hybrids between ‘Chinese Spring’ and the Spanish cultivar ‘Pané 247’ could be carried out. Differences in the chiasmata frequencies per chromosome arm cannot be explained on the basis of relative arm lengths only. Possible effects of arm-to-arm heterochromatic differences on meiotic pairing are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272894
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  • 3
    Electronic Resource
    Electronic Resource
    Meiotic pairing of the amphiploid Hordeum chilense X Triticum turgidum conv. durum studied by means of Giemsa C-banding technique (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 85-91 
    Details
    ISSN: 1432-2242
    Keywords: Heterochromatin ; Hordeum chilense ; Tritordeum ; C-banding ; Meiosis ; Triticum ; Amphiploid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The meiotic behaviour of the amphiploid Hordeum chilense X Triticum turgidum conv. durum using a C-banding staining method is studied. Nine pairs of chromosomes at metaphase-1 (4A, 7A and the seven of the B genome) were identified and the remaining wheat chromosomes (1A, 2A, 3A, 5A and 6A) and seven of the chilense (1 to 7 H ch chromosomes) were assigned to its particular genome. A similar mean number of univalents from parental genomes (wheat and wild barley) were found. No meiotic pairing between chilense and turgidum chromosomes was detected. Differences in the meiotic behaviour per chromosome and amongst genomes are explained on the basis of cytomorphological and heterochromatin characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264487
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of C-banded chromosomes in meiosis of common wheat, Triticum aestivum L. (1984)
    Springer
    Theoretical and applied genetics 67 (1984), S. 257-261 
    Details
    ISSN: 1432-2242
    Keywords: C-banding ; Common wheat ; Triticum aestivum L. ; Translocations ; Heterochromatin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The C-banding pattern of nine meiotic chromosomes of common wheat (Triticum aestivum L.) as described. In F1s of crosses between monosomics of ‘Chinese Spring’ and two Spanish wheat cultivars, univalent chromosomes were used to aid the recognition and analysis of the C-banding pattern for the individual chromosomes. The identification of one chromosome involved in one translocation in ‘Chinese Spring’ x ‘Pané 247’ has been made through heterochromatin bands observed in the chromosomes involved in multivalents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317049
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  • 5
    Electronic Resource
    Electronic Resource
    Gel filtration and high-performance liquid chromatographic analysis of phosphotungstic acid soluble peptides from blue cheeses (1987)
    Springer
    Chromatographia 23 (1987), S. 764-766 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Gel permeation chromatography ; Cheese peptides ; Amino acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The nitrogen fraction from cheese, soluble in phosphotungstic acid has been analyzed by gel permeation and high performance liquid chromatography. Elution profiles of this fraction on Sephadex G-10 show that there are no peptides of molecular weight higher than 700 daltons. Six fractions have been obtained. The first one has the peptides and some amino acids. Fractions II to VI contains mostly free amino acids. Fraction I has been separated into many peaks by HPLC. Six or seven of these peaks are presumed to correspond to peptides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02312670
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  • 6
    Electronic Resource
    Electronic Resource
    Solute-micelle association constants of some polynuclear aromatic hydrocarbons by micellar liquid chromatography with alcohol additives to mobile phase (1994)
    Springer
    Chromatographia 38 (1994), S. 342-348 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Hybrid mobile phases containing alcohols ; Solute-micelle association constants ; Polynuclear aromatic hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The interaction between some polynuclear aromatic hydrocarbons of environmental concern, and sodium dodecylsulphate and hexadecyltrimethylammonium bromide in the presence of methanol, 2-propanol and n-butanol has been evaluated by high-performance liquid chromatography using micellar mobile phases. Solute-micelle association constants have been determined for the compounds investigated. The results show that the addition of the alcohol to the mobile phase decreases the association constant values, methanol 〈2-propanol 〈n-butanol, relative to those in the absence of any additive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269778
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  • 7
    Electronic Resource
    Electronic Resource
    Solute-micelle association constants and correlation of octanol-water coefficients with hydrophobicity for polycyclic aromatic hydrocarbons by micellar chromatography (1992)
    Springer
    Chromatographia 34 (1992), S. 627-635 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Micelle-solute association constants ; Polynuclear aromatic hydrocarbons ; Octanol/water partition coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Sodium dodecyl sulphate, hexadecyltrimethylammonium bromide and polyoxyethylene(23) lauryl ether were investigated as mobile phases in the micellar liquid chromatography of polycyclic aromatic hydrocarbons of environmental concern. A wide range of surfactant concentrations were used and the retention parameters and distribution coefficients calculated. The trends in the retention data for the PAHs are discussed and several conclusions are presented concerning the partition coefficients when these surfactants are present in the mobile phase. Comparisons are made between the structural features of the compounds and their capacity factors, and the octanol/water partition coefficients are correlated with hydrophobicity for the PAHs studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269875
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  • 8
    Electronic Resource
    Electronic Resource
    On the convergence of multipoint Padé-type approximants and quadrature formulas associated with the unit circle (1996)
    Springer
    Numerical algorithms 13 (1996), S. 321-344 
    Details
    ISSN: 1572-9265
    Keywords: multipoint Padé-type approximation ; orthogonal rational functions ; quadrature formula ; 41A21 ; 30E05 ; 41A55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract We study the convergence of rational interpolants with prescribed poles on the unit circle to the Herglotz-Riesz transform of a complex measure supported on [−π, π]. As a consequence, quadrature formulas arise which integrate exactly certain rational functions. Estimates of the rate of convergence of these quadrature formulas are also included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207699
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  • 9
    Electronic Resource
    Electronic Resource
    Approximated solutions in rational form for systems of differential equations (1999)
    Springer
    Numerical algorithms 21 (1999), S. 185-203 
    Details
    ISSN: 1572-9265
    Keywords: systems of differential equations ; analytic solutions ; matrix Padé approximation ; rationality ; minimum degrees ; uniqueness ; partial differential equations ; 41A21 ; 34A45 ; 35A35
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract In this paper we present a technique to study the existence of rational solutions for systems of differential equations — for an ordinary differential equation, in particular. The method is relatively straightforward; it is based on a rationality characterisation that involves matrix Padé approximants. It is important to note that, when the solution is rational, we use formal power series “without taking into account” their circle of convergence; at the end of this paper we justify this. We expound the theory for systems of linear first-order ordinary differential equations in the general case. However, the main ideas are applied in numerical resolution of partial differential equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019109429882
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  • 10
    Electronic Resource
    Electronic Resource
    Matrix Padé Approximation of rational functions (1997)
    Springer
    Numerical algorithms 15 (1997), S. 167-192 
    Details
    ISSN: 1572-9265
    Keywords: Matrix Padé Approximation ; rationality ; minimum degrees ; uniqueness ; 65 ; 41 ; 15
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract In many applications it is of major interest to decide whether a given formal power series with matrix-valued coefficients of arbitrary dimensions results from a matrix-valued rational function. As the main result of this paper we provide an answer to this question in terms of Matrix Padé Approximants of the given power series. Furthermore, given a matrix rational function, the “smallest” degrees of the matrix polynomials which represent it are not necessarily unique. Therefore we study a certain minimality-type, that is, minimum degrees. We aim to obtain all the minimum degrees for the polynomials which represent the function as equivalents. In addition, given that the rational representation of the function for the same pair of degrees need not be unique, we have obtained conditions to study the uniqueness of said representation. All the results obtained are presented graphically in tables setting out the above information. They lead to a number of properties concerning special structures, staired blocks, in the Padé Table.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019193820428
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