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  • 1980-1984  (9)
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  • 1
    Electronic Resource
    Electronic Resource
    Limits of certain iterates of Post-Widder operators (1981)
    Springer
    Monatshefte für Mathematik 91 (1981), S. 131-138 
    Details
    ISSN: 1436-5081
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The paper is a study of the limiting behaviour of the [n t]-th iterates of the well-known Post-Widder operatorsL n, x used in the real inversion of the Laplace transform. It is shown that the limiting operators constitute a semigroup ∼T t;t≥0∼ of class (C 0) on a family ∼C α,β; α, β〉0∼ of Banach spaces. Applications of the semigroup structure lead to a pointwise saturation theorem forL n, x and a characterization of convex functions inC α, β through an inequality involving the action ofL n, x.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295143
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The antennae and mating behaviour ofDrosophila females (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 237-238 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The females ofDrosophila bipectinata andD. malerkotliana are able to discriminate between their own and alien males in the absence of antennae. Thus mate recognition seems to depend on contact chemoreceptors in these 2 species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945086
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Biologie des indischen Sojabohnen-Schädlings Plusia acuta Walker (Lep., Noctuidae) (1980)
    Springer
    Journal of pest science 53 (1980), S. 184-185 
    Details
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Es wird über — größtenteils im Labor durchgeführte —Untersuchungen zur Biologie der in Indien an Sojabohne schädlichen EulePlusia acuta Walker berichtet. Eizahl und Eiablageort, Stadien- und Gesamtentwicklung, Veruppungsform, Puppengewicht, Schlupfquote, Lebenszeit und Geschlechterverhältnis der Falter im Labor sowie Parasitierungsquote und Parasiternarten einer Freilandpopulation werden mitgeteilt.
    Notes: Abstract Plusia acuta, hitherto reported as a minor pest of soybeans, now has become its a regular and serious pest in Madhya Pradesh, India. During kharif season of 1979 it infested severely about 10 hectares of soybeans in Jabalpur, Madhya Pradesh, India. Research was, thus, carried out to work out its biology in the laboratory in 1979. Single female moth laid 97.6 eggs in its life span on both the surface of leaves and some times on tender petiole and petiolets. The incubation, larval, prepupal and pupal periods lasted for about 4, 14, 1 and 7 days, respectively. Total life cycle completed in 24.8 days. Male and female moths lived for 5.6 and 4.8 days, respectively. The percentage emergence of adults was 73.8 in the laboratory. 26.3 percent larvae were found parasitized in fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01903995
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Ausweichnahrungspflanzen der Sojabohnen-Eule, Plusia orichalcea F. (Lep., Noctuidae) in Jabalpur, Indien (1980)
    Springer
    Journal of pest science 53 (1980), S. 25-25 
    Details
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract During an outbreak of the soybean semilooper,Plusia orichalcea F. in Jabalpur, the caterpillars not only caused heavy damages to the soybean crop but were also commonly feeding on many other plants growing in soybean fields and nearly bunds. A list of these alternative host plants containing 15 species of 6 families is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01988716
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Studies on mitotic and salivary chromosomes of Dacus cucurbitae Coquillett (Diptera: Trypetidae) (1984)
    Springer
    Genetica 62 (1984), S. 217-221 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Dacus cucurbitae is a serious pest of various types of fleshy fruits and vegetables. The mitotic and salivary chromosomes were reinvestigated using the air-drying and different (C-and H-) banding techniques with a view to rectify the existing controversy regarding the Indian populations of this species. A standard map of its salivary chromosomes was constructed and some important identifiable landmarks were recognized in each arm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056439
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of certain asymptotic constants related with the post-Widder inversion of Laplace transform (1980)
    Springer
    Acta mathematica hungarica 36 (1980), S. 155-160 
    Details
    ISSN: 1588-2632
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01897106
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Graft-copolymerization of starch with acrylamide, I (1983)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 119 (1983), S. 183-192 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die Pfropfcopolymerisation von Acrylamid auf Stärke mit Cer(IV) als Initiator untersucht. Der Einfluß des Initiators, des Monomeren und der Säure auf die prozentuelle Pfropfausbeute wurde bestimmt. Die Kinetik der Acrylamid-Polymerisation in Abwesenheit und Anwesenheit von Stärke wurde untersucht. Die maximale Pfropfausbeute wurde mit 0,3 N HNO3 0,005 M Cerammoniumnitrat und 1,0 M Monomerkonzentration bei 50°C erhalten.
    Notes: The graft-copolymerization of acrylamide onto starch by cerium (IV) initiation has been investigated. The effect of the concentration of initiator, monomer and acid on % graft-on has been determined. The kinetics of the acrylamide polymerization in absence and presence of starch has been studied. The maximum % graft-on was obtained with 0.3 N HNO3, 0.005 M ceric ammonium nitrate and 1.0 M monomer concentration at 50°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1983.051190114
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  • 8
    Electronic Resource
    Electronic Resource
    Graft-copolymerization of starch with acrylamide, IIIPart II cf. lit.5.. Physical properties and enzymatic degradation (1984)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 122 (1984), S. 193-201 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Pfropfcopolymere aus Polyacrylamid auf Stärke (S-g-PAM) mit verschiedenen Pfropfgraden wurden hergestellt. Die Dichte dieser Pfropfcopolymeren war niedriger als die von Stärke. Die Pfropfung von Acrylamid auf Stärke unterbricht die körnige Struktur der Stärke und führt zu einer festen und kompakten Struktur. Folien aus verschiedenen Copolymeren und Mischungen aus Stärke und Polyacrylamid wurden durch Preßformen hergestellt. Eine Verbesserung der Zugfestigkeit und der Dehnung wurden an Pfropfcopolymeren beobachtet. Beim zweistündigen Aufheizen auf 100°C verloren die Pfropfcopolymeren einen großen Teil ihrer Festigkeit und Elastizität. S-g-PAM-Copolymere zeigten eine verbesserte Beständigkeit gegen einen Abbau durch α-Amylase.
    Notes: Starch-graft-polyacrylamide (S-g-PAM) copolymers having different graft-on were prepared. The density of these copolymers was lower than that of starch. The grafting of acrylamide onto starch disrupted the granular structure of starch and a tight and compact structure was formed. Sheets of various copolymers and blends of starch and polyacrylamide were prepared by compression moulding. An improvement in tensile strength and elongation was observed in graft-copolymers. When heated at 100°C for 2 h, the grafted sample lost a great deal of strength and elasticity. S-g-PAM copolymers also showed more resistance to degradation by α-amylase.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1984.051220119
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Graft-copolymerization of starch with acrylamide, IIPart I cf. lit.1.. Thermal behaviour of graft copolymers (1984)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 121 (1984), S. 187-193 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde das thermische Verhalten von mit Polyacrylamid gepfropfter Stärke untersucht. Das Pfropfen von Polyacrylamid auf Stärke setzt die Ausgangszersetzungstemperatur herab. Jedoch nimmt die allgemeine Stabilität, die durch die Form der thermogravimetrischen Kurven abgeschätzt werden kann, und die integrale Zersetzungstemperatur mit dem Ansteigen des Pfropfgrades zu.
    Notes: Thermal behaviour of starch-graft-polyacrylamide (S-g-PAM) copolymers was evaluated. Grafting of polyacrylamide onto starch lowers the initial decomposition temperature. However, the over-all stability as assessed by the shape of thermogravimetric curve and integral procedural decomposition temperature increased with an increase in % graft-on.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1984.051210117
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    Paper (German National Licenses)
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