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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 35 (1967), S. 122-130 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis, some dyeing, and fastness properties of several new dispersed, acid, and direct dyes derived from the aminobenzotriazoles (I-IV) and 5-hydroxybenzotriazole (V) are described. The suitability of the amino derivatives (I-IV) as bases for azoic dyeing has also been studied. Several interesting observations between the properties of some synthesized dyes and the corresponding benzene or naphthalene analoges are cited.
    Additional Material: 5 Tab.
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  • 2
    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: Gebeiztes Baumwollgarn (Substrat I) wurde spannungslos mercerisiert (Substrat II) und spannungslos mercerisiert, dann verstreckt um 94% (Substrat III) und 103% der urspriinglichen Länge (Substrat IV). Diese Substrate wurden einer Säurevorbehandlung unterworfen (0,5 N HCl, 60°C, 15 min). Die vier Substrate und ihre entsprechenden HCl-behandelten Substrate (I-H, II-H, III-H und IV-H) wurden unter ähnlichen Bedingungen mit N,N-Diethylaziridinchlorid umgesetzt, um Diethylaminoethyl (DEB)-Baumwolle zu erhalten. Zusätzlich wurden DEAE-Baumwollproben der Substrate I, I-H, II und II-H mit 0,5 N HCl bei 80°C 0,5, 1,2,3,5 und 7 h hydrolysiert und das Verhältnis der Substituenten in den D-Glucopyranosyl-Einheiten dieser DEAE-Baumwollproben sowie in denen der DEAE-Hydrocellulosen wurde bestimmt. Es wurde gefunden, daß ein beachtlicher Unterschied zwischen der Reaktivität gebeizter und spannungslos mercerisierter nachverstreckter Baumwolle besteht. Dies wurde im Sinne von Unterschieden in der Mikrostruktur der verschiedenen Substrate interpretiert, die umgekehrt Verfügbarkeit, Zugänglichkeit und Ordnungszustand der Cellulose-Hydroxylgruppen in gebeizter und mercerisierter Baumwolle widerspiegeln. Stickstoff-, chemische, mikroskopische und Röntgenanalysen wurden benutzt, um die strukturellen Unterschiede zwischen den Substraten festzustellen.
    Notes: Scoured ply cotton yarn (substrate I) was slack mercerized (substrate II) and slack mercerized followed by stretching to 94% (substrate III) and 103% of original length (substrate IV). These substrates were given an acid pretreatment (0.5 N HCl, 60°C, 15 min). The four substrates and their corresponding HCl-treated substrates (substrates I-H, II-H, III-H and IV-H) were reacted under similar conditions with N,N-diethylaziridinium chloride to yield diethylaminoethyl (DEAE)-cottons. In addition, DEAE-cottons of substrates I, I-H, II and II-H were hydrolyzed with 0.5 N HCl at 80°C for 0.5, 1, 2, 3, 5 and 7 h and the ratio of substituents in the D-glucopyranosyl units of these DEAE-cottons as well as in those of DEAE-hydrocelluloses were determined. It was found that there is a considerable difference between the reactivity of scoured cotton and slack mercerized-restretched cottons. This was interpreted in terms of differences in the microstructure between the substrates in question, which in turn, are reflected on availability, accessibility and state of order of the cellulose hydroxyls in the scoured and mercerized cottons. Nitrogen-, chemical, microscopical and X-ray analyses were used to assess the structural differences among the substrates.
    Additional Material: 7 Tab.
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  • 3
    ISSN: 0021-8995
    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
    Notes: The addition of mercaptoethanol and hydrogen sulfide to the pendent double bonds of acrylamidomethylated cotton (AMC) has been investigated. The interaction of acrylonitrile with the modified celluloses so obtained (substrate I and II) and with AMC treated with ammonium hydroxide (substrate III) in the presence of Ce(IV) is studied. Substrate I shows higher initial grafting yields. than AMC; the opposite holds true for the maximum graft yields. The graft yields obtained with substrate II are lower than those of AMC. All modified cottons studied are less amenable to grafting compared with the unmodified cotton. The graft yields of AMC and substrate III are comparable due to the fact that both substrates are crosslinked. Probable reasons for the inferior reactivity of substrates I and II are also given.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 24 (1979), S. 2071-2072 
    ISSN: 0021-8995
    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: 1 Tab.
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  • 5
    ISSN: 0021-8995
    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
    Notes: Partial carboxymethylation of the cotton component of polyester/cotton blend prior to durable press finishing with dimethyloldihydroxyethylene urea in presence of MgCl2·6H2O was carried out under different conditions to control the carboxyl content as well as alteration of the blend components accompanying the chemical modification. The susceptibility of these modified blend samples before and after crosslinking to aqueous and nonaqueous oily soiling and their ability to release the soil was examined. The general indications are that introduction of carboxymethyl groups in the molecular structure of the cotton component of the blend imparts soil release characteristics of the blend provided that (a) the condition of partial carboxymethylation is not accompanied by profound changes in neither the microstructure of the cotton component nor in the polyester content of the blend and (b) the carboxymethyl content should not be so high. It is proposed that the anionic nature of the modified cotton component of the blend during washing helps in repelling the negatively charged soil particles from the blend surface. In addition, a reduction in the interfacial tension at the soil-water interface assists in rolling up the soil and subsequent removal. This can be turned to the opposite if the electrostatic repulsion is masked through creation of soft swollen environment by significantly increasing the carboxymethyl content, decreasing the polyester content, and/or increasing the swellability of cotton component of the blend.
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 17 (1973), S. 2725-2738 
    ISSN: 0021-8995
    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
    Notes: Acrylamidomethylated cellulose (AMC) was prepared by reacting cellulose with N-methylolacrylamide or its ethers in acidic medium under a variety of conditions. The extent of the reaction, expressed as mmole double bonds per 1 g cellulose, increased by increasing the concentration of N-methylolacrylamide or its ethers. However, the paddry-cure technique produced AMC with greater amounts of double bonds than the pad-batch technique. Also, the reactivity of the etherifying agents follow the order N-methylolacrylamide〉N-methoxymethylacrylamide〉N-methoxymethylmethacrylamide. Furthermore, the behavior of AMC in neutral, alkaline, and acidic media was studied. No change in the amount of the pendent double bonds of AMC occurred in neutral medium regardless of the conditions employed. On the contrary, disappearance of the double bonds took place in alkaline medium. The extent of disappearance depends on the kind of alkali used as well as on the conditions implemented. It was disclosed that consumption of the pendent double bonds of AMC occurred mainly via addition of the cellulose hydroxyls to yield a crosslinked cellulose. Treatment with hydrochloric acid, on the other hand, resulted in partial splitting of the acrylamidomethyl groups as well as addition of the acid on the pendent double bonds of AMC.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 20 (1976), S. 2407-2418 
    ISSN: 0021-8995
    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
    Notes: Viscose rayon fibers modified with polyacrylonitrile (PAN) and poly(methyl methacrylate) (PMMA) were dyed with some direct and reactive dyes. Exhaustion rate of the dye onto fibers was governed by the amount and nature of the polymer grafted. In general, the dye affinity for cellulose and dye exhaustion onto fibers decreased as the graft yield increased. Dye affinity for the PAN-cellulose graft copolymers was greater than that found with PMMA-cellulose graft copolymers. Except in a few cases, the tendency of cellulose graft copolymers of ca. 13% graft to accept direct dyes was more than that of the untreated cellulose, whereas the affinity of reactive dyes for cellulose graft copolymers of up to ca. 43% polymer was more than that of untreated cellulose. The dye fixation, based on the weight of cellulose component, increased as the graft yield increased. The dyeability of cellulose oxidized with ceric ammonium nitrate was also examined. Oxidation of cellulose prior to dyeing reduced the affinity of the dye for cellulose.
    Additional Material: 6 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1976), S. 79-85 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mass spectra and fragmentation patterns of several substituted 1,1-difluorocyclopropanes have been investigated. Trends in fragmentation probabilities of different difluorocyclopropanes seem to be related qualitatively to well known empirical substituent effects.
    Notes: Die Massenspektren von verschiedenen substituierten 1.1-Difluorcyclopropanen wurden aufgenommen und ihr Fragmentierungsverhalten untersucht. die Tendenzen in den Bildungswahrscheinlichkeiten der Bruchstükionen bei verschiedenen Difluorcyclopropanen lassen sich qualitativ mit bekanten empirischen Substituenteneffekten erklären.
    Additional Material: 4 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 42 (1959), S. 128-130 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das aus 1-Naphtylhydrazin-4-sulfosäure und Phenanthrenchinon dargestellte Phenanthrenrot ist nicht, wie bisher angenommen, ein Dihydrazon, sondern ein Monohydrazon (9-Hydroxy-l0-[4′-sulfonaphtalin-l′-azo]-phenanthren).
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 68 (1998), S. 329-350 
    ISSN: 0020-7608
    Keywords: HeH- ; comparative study of errors ; SCF ; electron correlation ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Basis set truncation error (BSTE), size extensivity Error (SEE), zero point vibrational energy (ZPVE), and basis set superposition error (BSSE) of HeH- weak van der Waals interaction energy were determined and compared at the self-consistent field (SCF), many-body perturbation theory (MBPT), and coupled cluster (CC) methods using even-tempered functions. Isotope substitution effects and the role of bond function augmentation were taken into account. Apart from core correlation energy error (CCEE), which is absent from HeH- interaction energy, the results confirm that BSTE is the most important source of error, followed by SEE of the truncated configuration interaction (CI) expansion, ZPVE and BSSE in a descending order. Introducing quadrable excitations to the truncated CI expansion reduces the magnitude of SEE by ∼45.7%, and BSSE correction is not necessary even at the electron correlation level. While bond function augmentation reduces BSSE at the Hartree-Fock, it has an oscillating behavior at the electron correlation level.   © 1998 John Wiley & Sons, Inc. Int J Quant Chem 68: 329-350, 1998
    Additional Material: 10 Tab.
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