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  • Analytical Chemistry and Spectroscopy  (7)
  • Cell & Developmental Biology  (4)
  • Helianthus annuus  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Distribution of ent-kaurene synthetase in Helianthus annuus and Marah macrocarpus
    Amsterdam : Elsevier
    Phytochemistry 24 (1985), S. 461-464 
    Details
    ISSN: 0031-9422
    Keywords: Compositae ; Cucurbitaceae ; Helianthus annuus ; Marah macrocarpus ; distribution in tissues. ; ent-kaurene synthetase ; natural inhibitors
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)80747-5
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic distance as a predictor of heterosis and hybrid performance within and between heterotic groups in sunflower (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 889-894 
    Details
    ISSN: 1432-2242
    Keywords: Key words Heterosis ; Genetic distance ; Sunflower ; Helianthus annuus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Heterosis is significant for seed yield and is one of the driving forces behind the hybrid seed industry in cultivated sunflower (Helianthus annuus L). Heterotic groups in sunflower, if any other than the female and male inbred-line groups exist, have not been well studied or described. The primary aims of this study were to assess the utility and validity of a series of proposed heterotic groups and estimate correlations between genetic distance, heterosis, and hybrid performance for seed yield in sunflower. Fortytwo female by male heterotic group (A × R) and 81 female by female heterotic group (A × B) single-cross hybrids were grown in Corvallis, Ore., and Casselton, N.D., in 1996 and 1997. Heterosis was significant for seed yield and plant height but not for seed oil concentration and days to flowering. Genetic distances were significantly correlated with hybrid seed yield when estimated from AFLP fingerprints (G D) (r = 0.63 for A × R and 0.79 for A × B hybrids), but not from coancestries (G C) (r = -0.02 for A × R and 0.54 for A × B hybrids). G D (R 2 = 0.4) was a poor predictor of hybrid seed yield. The proposed heterotic groups in sunflower seem to have utility, but do not seem to be as strongly differentiated as those in corn (Zea mays L.). The highest-yielding hybrids were from the BC× RB heterotic pattern; however, several BC× BC hybrids (within-group hybrids) were among the top-yielding hybrids. The outstanding performance of certain BC× BC hybrids casts some doubt on the validity of the BC group. Substantial genetic diversity seems to be present within and between heterotic groups in sunflower.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051366
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  • 3
    Electronic Resource
    Electronic Resource
    Diversity among sources of cytoplasmic male sterility in sunflower (Helianthus annuus L.) (1991)
    Springer
    Euphytica 55 (1991), S. 125-129 
    Details
    ISSN: 1573-5060
    Keywords: sunflower ; Helianthus annuus ; hybrid breeding ; cytoplasmic male sterility ; fertility restoration ; interspecific hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Ten cytoplasmic male sterile (CMS) sunflower (Helianthus annuus L.) lines were crossed with nine maintainer or male fertility restorer lines in a diallel crossing scheme. Based on fertility restoration of the F1 generation, CMS lines were divided into four groups. At least two new sources of CMS, CMS PET2 and CMS GIG1, were found to be potentially useful for commercial production of hybrids. Environment had an influence on fertility restoration of one CMS line, CMS MAX1. Effective restoration of male fertility for CMS RIG1, CMS ANN2, and CMS ANN3 was not found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025224
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  • 4
    Electronic Resource
    Electronic Resource
    Ossiculum lus (1914)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 8 (1914), S. 415-418 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1090080803
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  • 5
    Electronic Resource
    Electronic Resource
    The nature of the cells generating B-Lymphocyte colonies in vitroThis work was supported by the Carden Fellowship Fund of the Anti-Cancer Council of Victoria, the National Cancer Institute, Washington, Contract NOI-CB-33854 and the National Health and Medical Research Council, Canberra. (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 88 (1976), S. 107-116 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: B-lymphocyte colonies were grown in semi-solid agar from mouse spleen or lymph node cells in the presence of mercaptoethanol with or without added sheep red cells. High levels of colony-forming cells were present in the spleen or normal mice and nu/nu (athymic) mice but colony-forming cells were rare in the thymus and not detected in activated T-lymphocyte populations. Colony-forming cells were θ-negative and most exhibited Fc receptors. Most colony-forming cells had the sedimentation velocity of small lymphocytes, were non-adherent and had a buoyant density similar to B-lymphocytes. Colony-forming cells were radiosensitive (Do 60 rads) and sensitive to cortisone. Colony formation was potentiated by the addition of adherent spleen cells or peritoneal macrophages. It is concluded that most cells forming B-lymphocyte colonies are themselves characterisable as B-lymphocytes.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040880112
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  • 6
    Electronic Resource
    Electronic Resource
    Amino acid transport and exchange in unfertilized mouse eggs (1986)
    New York, NY : Wiley-Blackwell
    Gamete Research 15 (1986), S. 1-12 
    Details
    ISSN: 0148-7280
    Keywords: methionine uptake ; methionine efflux ; kinetic parameters ; trans-stimulation ; trans-inhibition ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The mouse egg is an ideal model for the kinetic study of neutral amino acid exchange transport in development in that it possesses strong exchange-mediated uptake/efflux with little other efflux. Exchange transport was examined by preloading eggs in unlabeled or labeled amino acid and then measuring subsequent amino acid fluxes. The existence of two L-like (leucine-preferring) systems, a low-affinity exchange system, and a high-affinity weakly exchanging system is suggested by the differences between preloaded and control eggs in uptake specificity and in the kinetic parameters of methionine uptake (respectively, Km = 220 and 69 μM, Vmax = 98 and 32 fmol/min/egg). The Vmax of exchange-mediated efflux of methionine is similar to that for uptake into preloaded eggs, but the Km is about an order of magnitude higher. Preloading in alanine and serine (preferred substrates, along with cysteine, of system ASC) decreased the subsequent uptake of radiolabeled methionine, suggesting some ASC activity in the unfertilized mouse egg. The plateau in accumulation of leucine and phenylalanine, characteristic of simple exchange (mediated by system L), is not shared by methionine, suggesting the existence of another system (possibly an A, or alanine-preferring, system) for the transport of methionine. Amino acid transport in the mouse egg is more complex than previously thought, the egg possessing four interacting systems for the transport of the neutral amino acids.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1120150102
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  • 7
    Electronic Resource
    Electronic Resource
    Spectra-structure relationships in carbon-13 nuclear magnetic resonance spectroscopy. Results from a large data base (1979)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 12 (1979), S. 289-296 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A link between a substructure searching system and a 13C NMR data base has been established and permits the retrieval and examination of the chemical shifts associated with specific substructures. The means by which these searches are accomplished is described and the results from the searches are presented and discussed. The system is interactive, and can be used to locate in the data base the chemical shifts of carbon atoms in precisely defined environments. Alternatively, it may be used to learn the range of the chemical shifts possessed by particular types of carbon atoms, such as N-methyl or O-methyl carbons.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270120508
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  • 8
    Electronic Resource
    Electronic Resource
    Fragmentation and rearrangement processes in the mass spectra of perhalogeno-aromatic compounds - VIIFor Part VI, see Ref. 1.. Pentafluorophenyl derivatives of nitrogen (1972)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 6 (1972), S. 89-103 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of several perfluoroaromatic nitrogen compounds, including primary and secondary amines, diamines, nitriles, hydrazines, azines and azo compounds, are presented. Fragmentation patterns of these compounds are described and the data are discussed in terms of comparisons amongst perfluoroaromatic nitrogen compounds, and with reference to the hydrogen substituted analogs, or to oxygen and sulfur analogs of a particular compound.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210060110
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  • 9
    Electronic Resource
    Electronic Resource
    Fragmentation and rearrangement processes in the mass spectra of perhalogenoaromatic compounds - VI. Perfluoroaromatic heterocyclic derivatives of sulfur, selenium and tellurium (1972)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 6 (1972), S. 373-384 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of the compounds C12F8M2 (M = S, Se), (I), C12F8M (M = S, Se, Te), (II) and C12F8SX2 (X = Br, I), (III), have been measured. Results indicate that sulfur-carbon bonds are more stable under electron bombardment than either selenium-carbon or tellurium-carbon bonds. Numerous metastable-supported transitions are evident, which are incorporated into comprehensive fragmentation schemes for these compounds. Many metastable transitions, not previously reported, were observed for the fluorocarbon fragments and a fragmentation scheme is reported.The bromine and iodine-containing compounds behave remarkably like the heterocyclic systems, I and II, presumably due to initial loss of Br2 or I2 to form a ring system of type II.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210060404
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  • 10
    Electronic Resource
    Electronic Resource
    Pentafluorophenyl and phenyl-phosphinidene ions and their group V analogues (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 237-238 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210030212
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