Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Polymer and Materials Science  (6)
  • Analytical Chemistry and Spectroscopy  (3)
  • isozymes  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Biochemical genetics of hybrid sunfish: Differential survival of heterozygotes (1974)
    Springer
    Biochemical genetics 11 (1974), S. 205-219 
    Details
    ISSN: 1573-4927
    Keywords: heterosis ; heterozygosity ; hybrids ; isozymes ; sunfish ; Centrarchidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Allelic segregation in reciprocal backcrosses involving the largemouth bass (Micropterus salmoides) and the F1 hybrid (largemouth bass × smallmouth bass, M. dolomieui) was investigated to determine the extent of euheterosis and luxuriance. The frequencies of allelic isozymes encoded in the lactate dehydrogenase E, malate dehydrogenase B, and isocitrate dehydrogenase loci were determined for reciprocal backcross progeny subjected to different selection pressures. The progeny of the backcross (male F1 × female largemouth bass) underwent a rapid loss of heterozygous individuals in a natural pond environment. When the offspring of this same mating were placed in artificial pools, where cannibalism is the main source of mortality, heterozygosity was advantageous. There was a marked correlation of increased heterozygosity at these enzyme loci with an increased growth rate. None of the above responses to selection was observed when the F1 hybrid served as the maternal parent in the reciprocal backcross. A maternal factor in the egg cytoplasm may influence the expression of heterosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486056
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Esterase polymorphism in the corn earworm, Heliothis zea (Boddie): A survey of temporal and spatial allelic variation in natural populations (1975)
    Springer
    Biochemical genetics 13 (1975), S. 885-898 
    Details
    ISSN: 1573-4927
    Keywords: Heliothis zea ; esterases ; isozymes ; allelic variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Allelic variation at the Est-II locus was investigated in 22 natural populations of Heliothis zea from maize, separated spatially and temporally. Of the four alleles observed, Est-II b was the predominant one in every population. The relative frequency of Est-II b ranged from 0.57 to 0.85, with a mean of 0.72±0.06, and proved to be remarkably stable in space and time. Temporal changes in Est-II allele frequencies were observed at two of the sampling localities; however, principal component analysis and multiple correlation of genetic and environmental components have provided persuasive evidence that abiotic environmental or geographic variation is not related to differences in Est-II allele frequencies. Possible factors responsible for the maintenance of this polymorphism are discussed and include possible effects of the chemical composition of host plants and pesticides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00484418
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Genetic and molecular analysis of nonrandom dimer assembly of the creatine kinase isozymes of fishes (1978)
    Springer
    Biochemical genetics 16 (1978), S. 811-829 
    Details
    ISSN: 1573-4927
    Keywords: isozymes ; creatine kinase ; fishes ; dimer ; restricted assembly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Species within many families of actinopterygian bony fishes (class Osteichthyes) have a two-banded allelic isozyme phenotype in individuals heterozygous at the creatine kinase A locus. This two-banded pattern is formed by the presence of the two homodimeric isozymes and the absence of the expected heterodimer. Sharks and amphibians have retained the ability to form all three allelic isozymes in individuals which are heterozygous. Reversible denaturation procedures were able to assemble the different allelic CK-A subunits within a species to form CK-A2 heterodimers. Furthermore, heterodimers were formed from different CK-A subunits from highly divergent species after this in vitro molecular hybridization process. It is concluded from these studies that the polypeptidebinding sites of creatine kinase are structurally conservative in most fishes and that the absence of a heterodimer in heterozygous individuals is not due to a structural incompatibility between the different A subunit types or to an instability of the heterodimer during electrophoresis. A temporal and/or spatial isolation of allelic CK-A subunit synthesis and assembly, within differentiated skeletal muscle, appears to have evolved in the actinopterygian bony fishes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00484738
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Gas chromatographic/mass spectrometric identification of chlorinated and oxygenated cyclohexene artifacts formed during the analysis of chlorinated water samples (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1988), S. 453-458 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chlorinated and oxygenated cyclohexene derivatives detected in methylene chloride extracts of chlorinated drinking water were demonstrated to be artifacts produced during sample preparation. Commercial methylene chloride contains cyclohexene as a preservative, and this reacted during the extraction/concentration process to produce microgram amounts of chlorocyclohexene, 2-chlorocyclohexanol, trans-1,2-dichlorocyclohexane, cyclohexenone and cyclohexenol. Quantitative analysis indicated that over 90% of the initial cyclohexene was consumed during the process. Dechlorination of drinking water with sodium arsenite significantly reduced but did not eliminate cyclohexene artifact formation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200150807
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Molecular routes to materials in New York (1992)
    Weinheim : Wiley-Blackwell
    Advanced Materials 4 (1992), S. 443-445 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19920040617
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Mosaic tiling in molecular dimensions (1995)
    Weinheim : Wiley-Blackwell
    Advanced Materials 7 (1995), S. 414-416 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19950070417
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Additive fabrication of integrated ferroelectric thin-film capacitors using self-assembled organic thin-film templatesThis work was supported by the national science foundation (CHE9626871) and the department of energy via the seitz materials research laboratory under contract DEFG02-91ER45439. The contributions made to this work by the central facilities of the center for the microanalysis of materials (MRL) and the Beckman institute at the university of Illinois are gratefully acknowledged. (1997)
    Weinheim : Wiley-Blackwell
    Advanced Materials 9 (1997), S. 891-895 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19970091107
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Concentration dependence of proteoglycan diffusion (1985)
    New York : Wiley-Blackwell
    Biopolymers 24 (1985), S. 2165-2173 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mutual diffusion coefficient of the bovine nasal cartilage proteoglycan subunit is found to increase rapidly with increasing concentration and decreasing ionic strength. These results have been obtained by analysis of the boundary relaxation of concentration gradients in the analytical ultracentrifuge by schlieren optics. The diffusion behavior can be understood in terms of the nonideality of the proteoglycan. The magnitude of the nonideality is dominated by charge interactions, whereas the influence of molecular size and associated excluded-volume interactions is small. The concentration dependence of the apparent diffusion coefficient of the proteoglycan subunit from dynamic light scattering was found, in contrast, to decrease with increasing concentration. Computer simulation of the dynamic light scattering suggests that the presence of a small population of aggregates may account for the difference in the two types of diffusion measurement due to their marked influence on the scattering.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360241111
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    The gas chromatographic and mass spectrometric behavior of 2-amino-1-iodo-3-phenylpropane (iodoamphetamine) (1980)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 7 (1980), S. 327-330 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The gas chromatographic and mass spectrometric behavior of 2-amino-1-iodo-3-phenylpropane (iodoamphetamine) was investigated. It was determined that the compound is unstable under the gas chromatographic mass spectrometric conditions used, undergoing a number of reactions and rearrangements. When iodoamphetamine hydrochloride was neutralized with base and the product examined by gas chromatography two peaks resulted. The major peak was identified as 2-benzylaziridine formed by the expulsion of HI from iodoamphetamine. The minor peak corresponded to iodoamphetamine itself. When an ethanolic solution of iodoamphetamine hydrochloride was injected into the gas chromatograph, however, three peaks were observed. Two of the three peaks had retention times identical to those identified previously. The other peak was concluded to be a chloro compound resulting from the opening of the aziridine ring with chloride ion.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200070803
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Detection of Nylon-6,6 Cyclic Monomers on Polymer Surfaces using Static SIMS (1997)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 799-803 
    Details
    ISSN: 0142-2421
    Keywords: Nylon-6,6 ; static SIMS ; ToF-SIMS ; polymer surface analysis ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The characteristic static SIMS spectra of the cyclic monomer of Nylon-6,6 have been obtained from the isolated and purified material. The spectra are sufficiently different from those obtained from bulk Nylon-6,6 polymer. Intense fragment ions corresponding to (M+H)+ and (M-H)- are observed in the positive and negative ion spectra, respectively. Results from both quadrupole and ToF-SIMS measurements are presented. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...