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  • 1
    Online Resource
    Online Resource
    The Inverse Scattering Transformation and the Theory of Solitons. (1981)
    Amsterdam :Elsevier Science & Technology,
    Details
    Keywords: Scattering (Physics). ; Solitons. ; Inverse scattering transform. ; Electronic books.
    Description / Table of Contents: The Inverse Scattering Transformation and The Theory of Solitons.
    Type of Medium: Online Resource
    Pages: 1 online resource (235 pages)
    Edition: 1st ed.
    ISBN: 9780080871615
    Series Statement: Issn Series ; v.Volume 50
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=405533
    DDC: 515.3/53
    Language: English
    Note: Front Cover -- The Inverse Scattering Transformation and The Theory of Solitons -- Copyright Page -- TABLE OF CONTENTS -- PREFACE -- CHAPTER 1. THE KORTEWEG-DE VRIES EQUATION -- 1.1. Historical introduction -- 1.2. Elementary properties -- 1.3. The soliton behaviour -- 1.4. The initial value problem, Existence and uniqueness of solutions -- 1.5. Miura's transformation and the modified -- CHAPTER 2. SOLUTION BY THE METHOD OF GARDNER-GREEN-KRUSKAL- MIURA. THE INVERSE SCATTERING TRANSFORMATION -- 2.1. The scattering problem for the SchÖdinger equation on the line -- 2.2. Invariance of the spectrum for potentials satisfying the K.D.V. equation -- 2.3. Evolution of the scattering data -- 2.4. Summary and discussion of the method of solution by the inverse scattering transformation -- 2.5. The pure N-soliton solution -- 2.6. The pure 2-soliton solution: an exercise -- 2.7. Relation between soliton speed and eigenvalues -- 2.8. The emergence of solitons from arbitrary initial conditions -- CHAPTER 3. ISOSPECTRAL POTENTIALS. THE LAX APPROACH -- 3.1. The invariance of discrete eigenvalues by an elementary approach -- 3.2. The invariance of the spectrum -- 3.3. Isospectral potentials for the SchrÖdinger equation -- 3.4. Isospectral potentials for more general selfadjoint operators -- 3.5. An alternative approach -- CHAPTER 4. DIRECT AND INVERSE SCATTERING FOR THE SCHRÖDINGER'S EQUATION -- 4.1. Solutions and scattering data of Schrödinger's equation -- 4.2. Properties of solutions -- 4.3. The spectrum of - d2/DX2 + u on L2(m) -- 4.4. Fourier transform of the solutions -- 4.5. Inverse scattering -- 4.6. Concluding remarks -- CHAPTER 5. DIRECT AND INVERSE SCATTERING FOR THE GENERATED ZAKHAROV-SHABAT SYSTEM -- 5.1. Solutions and scattering coefficients of the generalized Zakharov-Shabat system -- 5.2. Properties of solutions. , 5.3. The spectrum of (100-1)(d/dx=Q) ON L2(IR)2 -- 5.4. Fourier transform of solutions -- 5.5. Inverse scattering -- CHAPTER 6. APPLICATIONS OF THE INVERSE SCATTERING -- 6.1. The nonlinear SchrÖdinger equation -- 6.2. Isospectral potentials for nondegenerate first order system using an alternative approach -- 6.3. Some evolution equations for isospectral potentials by ad hoc prosedures -- 6.4. The general AKNS evolution equations -- 6.5. Degenerate first order scattering systems and the sine-Gordon equation -- 6.6. Higher order scattering systems -- CHAPTER 7. PERTURBATIONS -- 7.1. Introduction and general formulation -- 7.2. Evolution of the Scattering data in the case of the Schrödinger equation -- 7.3. Evolution of the scattering data in the case of the generalized Zakharov-Shabat problem -- 7.4. Perturbation analysis -- REFERENCES.
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic variation and control of plant regeneration in leek (Allium ampeloprasum L.) (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 114 (1995), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Zygotic embryos of leek (Allium ampeloprasum L.) were isolated from mature seeds of different cultivars, selfings and full-sib families. The embryos were cultured on callus induction and shoot regeneration medium and employed to study several parameters: percentage of embryos forming calluses, percentage of embryos forming compact calluses, callus weight, percentage of regenerating calluses, numbers of shoot primordia and numbers of regenerated shoots. Differences between cultivars and selfings were found for most parameters studied. For all cultivars all parameters, except callus weight, decreased after one generation of selfing. Compact callus types enhanced primordia formation and shoot regeneration. Genetic characteristics of callus development and plant regeneration were studied in a 4 × 4 diallel cross. Analysis of variance revealed significant differences between full-sib families. The diallel analysis showed that additive gene effects were significant for all parameters. The predominance of additive gene effects indicated high narrow-sense heritability. Breeding for an increased number of regenerated shoots was successful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1995.tb01244.x
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  • 3
    Electronic Resource
    Electronic Resource
    Book reviews (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 508-510 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229514
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  • 4
    Electronic Resource
    Electronic Resource
    A suggested method for investigating L1 constitution in periclinal potato chimeras (1972)
    Springer
    Potato research 15 (1972), S. 73-75 
    Details
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The most reliable way to study the nature of L1 in suspected periclinal chimeras is to investigate plants derived from L1 tissue only. Induction of adventitious buds and shoots from dedifferentiated epidermal tissue only, has proved to be easy in several ornamental plants such asSaintpaulia andStreptocarpus, but for potato until now only some incidental successes have been obtained using detached leaflets with different treatment. If this method could be developed to give adequate numbers of adventitious shoots, it is suggested that it could be used on a monochlamydeous (periclinal) chimera to prove the L1 origin of these shoots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02356186
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  • 5
    Electronic Resource
    Electronic Resource
    Rode Eersteling: a false name for a well-known tuber colour mutant (1970)
    Springer
    Potato research 13 (1970), S. 353-355 
    Details
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary It is shown that the monectochimeraRote Holländische Erstling used in Klopfer's chimera experiments does not correspond with the present homohistic Dutch potato varietyRode Eersteling. The latter seems to be identical with Klopfer's homohisticErstling Rouge.4 This misapprehension is caused mainly by replacing the original monectochimerical varietyRode Eersteling in 1942 by a homohistic red sport, derived from it, without changing the variety name.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02358280
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  • 6
    Electronic Resource
    Electronic Resource
    The ‘Jørgensen’ method, does it produce adventitious sprouts from potato? (1974)
    Springer
    Potato research 17 (1974), S. 340-343 
    Details
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary While investigating the formation of adventitious sprouts from L1 tissue in potato as part of our work on potato mutation, we tested the ‘Jørgensen’ method. This unpublished method of raising sprouts at the base of plantlets that have been severed from tubers was tried with our red-splashed, stable monectochimeric clones B165 and EM52. The changes of tuber colour from fully-grown (adventitious?) sprouts allowed us to draw the following conclusions: 1. The new sprouts cannot be of epidermal origin, since no yellow-tubered progeny were obtained. 2. The many red-splashed tubers that were obtained must be of axillary origin, i.e. from axillary buds at the edges of the fracture. 3. The red tubers may be of adventitious origin, but uncovering via layer perforation is not excluded the more so as a regeneration time of three weeks is rather short for adventitious origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02360330
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  • 7
    Electronic Resource
    Electronic Resource
    Preventing chimerism in potato (Solanum tuberosum L.) (1972)
    Springer
    Euphytica 21 (1972), S. 11-21 
    Details
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A fast neutron irradiation experiment using two different dose rates has been performed on the potato variety Desiree in order to obtain chimera-free mutants. Both tubers and tuber parts (cross sections) were de-eyed at different moments before and after irradiation. Adventitious sprouts successively developing on the callus in the holes of excised eyes were separated from the treated tubers and planted individually. So called ‘grouped’ sprouts were separated. Results indicated that (practically) chimera-free mutants can be obtained by de-eying tuber parts shortly before irradiation, by applying relatively high dose-rates and by taking adventitious sprouts which develop not earlier than three months after irradiation. Separation of the grouped sprouts demonstrated that each part originated from a single original cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040543
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  • 8
    Electronic Resource
    Electronic Resource
    Efforts to chemically induce mutations for cytoplasmic male sterility in petunia. I. Field experiments (1985)
    Springer
    Euphytica 34 (1985), S. 769-778 
    Details
    ISSN: 1573-5060
    Keywords: Petunta x hybrida, petunia ; induced mutations ; cytoplasmic male sterility (CMS) ; ethidium bromide (EB) ; ethylnitroso urea (ENU)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In the period 1980–1984 about 70000 selfed seeds of the petunia cultivar Blue Bedder were treated with the chemical mutagens ethidium bromide (EB) and ethylnitroso urea (ENU) with the intention to induce (new sources of) cytoplasmic male sterility (CMS). This work resulted in 27 stable male sterile MS-plants, all derived from the ENU-treatments. Crosses with the normal fertile type and with material carrying restorer genes for the common type of CMS in petunia were made. Results obtained from some MS-plants raise a presumption of genic male sterility, probably of the dominant type, having been induced. More detailed investigations are underway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035415
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  • 9
    Electronic Resource
    Electronic Resource
    Dihaploid potatoes in mutation breeding: Some preliminary results (1973)
    Springer
    Euphytica 22 (1973), S. 1-7 
    Details
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Dihaploids of the potato variety Desirée were used to obtain preliminary information about the doses and dose rates most suitable for mutation breeding purposes. The sprouts that developed after irradiation were removed in succession and then planted separately in pots. A broad distinction of 3 successive groups of sprout production can be made. The low dose rate object (50 rad/min) demonstrated an increase in overall as well as in uniform mutation frequency in the successive groups, while the high dose rate group (1000 rad/min) showed a converse behaviour with regard to overall mutation frequency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021549
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  • 10
    Electronic Resource
    Electronic Resource
    Single cell origin of adventitious buds (1985)
    Springer
    Euphytica 34 (1985), S. 93-95 
    Details
    ISSN: 1573-5060
    Keywords: Saintpaulia ionantha ; African violet ; adventitious buds ; in vivo and in vitro ; single-cell origin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Objections are raised against the view of Norris et al. (Science 220, 1983), that adventitious buds from African violet leaf explants are of multicellular origin. The experimental results of these authors can be interpreted differently and may therefore support as well the opposite standpoint that the adventitious buds are (ultimately) of single-cell origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022867
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