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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of organized protein multilayers (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Rapid Communications 19 (1998), S. 173-176 
    Details
    ISSN: 1022-1336
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A novel technique of preparation of multilayer assemblies consisting of a controlled number of molecular layers of various proteins arranged according to a predetermined architecture is described. The multilayers were formed by consecutive adsorption of polyanions and positively charged proteins below their isoelectric point and covalently crosslinked via protein amino groups. Polyanions were washed out from the crosslinked protein assembly by rinsing with buffer in which the net charge of the proteins was inverted.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Infrared spectra and sequence length distribution in free radical styrene/methacrolein copolymers (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 164 (1973), S. 249-263 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Blockcopolymerisation des Styrols (S) mit Methacrolein (M), mit Azoisobuttersäurenitril als Initiator, dient zur Bestimmung der Copolymerisationsparameter rS = 0,15 und rM = 0,55 (QM = 1,50, eM = 0,78). Zur Aufklärung der Struktur der Copolymerisate wird die quantitative IR-Spektroskopie im Bereich von 4000 bis 450 cm-1 verwendet. Neben den Methacrolein-Grundbausteinen, die Aldehydgruppen besitzen, können die Copolymerisate auch cyclische Hemiacetal-Strukturen enthalten, welche durch die Reaktion der Carbonylgruppen der benachbarten Methacrolein-Grundbausteine entstehen. Die Absorption des Carbonyls bei 1722 cm-1 zeigt, daß bis zu 30 Mol-% Methacrolein im Copolymerisat, fast alle Methacrolein-Grundbausteine freie Aldehydgruppen enthalten. Der Anteil der cyclischen Strukturen nimmt mit steigender Konzentration des Methacroleins im Copolymerisat zu. Die Versuchsergebnisse entsprechen der statistischen Theorie über die Sequenzverteilung. Die Verschiebung der Absorptionsbande des Styrols von 540 cm-1 nach höheren Wellenzahlen wird untersucht und mit der Sequenzlänge-Verkürzung der Styrolgrundbausteine in Zusammenhang gebracht. Es wird festgestellt, daß die Intensität der Styrolbande bei 760 cm-1 von der Verteilung der MSM-Triaden und der Struktur des Copolymerisats abhängt.
    Notes: The method of azoisobutyronitrile (AIBN)-initiated bulk copolymerization of styrene (S) and methacrolein (M) was employed to determine the monomer reactivity ratios rS = 0.15 and rM = 0.55 (QM = 1.50, eM = 0.78). Quantitative IR spectroscopy in the region of 4000-450 cm-1 was used to elucidate the structure of copolymers. In addition to methacrolein units containing aldehyde groups, the copolymers may also contain cyclic hemiacetal structures formed by the reaction of the carbonyls of the neighboring methacrolein units. The carbonyl absorption at 1722 cm-1 showed that, up to 30 mole-% methacrolein in the copolymer, almost all methacrolein units have free aldehyde groups. The number of cyclic structures increases with the concentration of methacrolein in the copolymer. The experimental data are in agreement with the statistical theory on the sequence length distribution. The shift of the styrene band at 540 cm-1 to higher wavenumber was investigated and related to the shortening of sequence length of the styrene units. The intensity of the styrene band at 760 cm-1 was related with the distribution of the MSM triads and the copolymer structure.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021640123
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  • 3
    Electronic Resource
    Electronic Resource
    The copolymerization of methacrylaldehyde with hydrophilic monomers (1980)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 181 (1980), S. 367-372 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Copolymers of methacrylaldehyde with hydrophilic monomers  -  2-hydroxyethyl methacrylate, 5-hydroxy-3-oxapentyl methacrylate, 8-hydroxy-3,6-dioxaoctyl methacrylate, N-ethylmethacrylamide, N,N-diethylacrylamide, and N,N-diethylmethacrylamide  -  were prepared by solution polymerization in N,N-dimethylformamide initiated with 2,2′-azodiisobutyronitrile. In the copolymer of methacrylaldehyde (1) with 2-hydroxyethyl methacrylate (2) (r1 = 0,77, r2 = 0,36) and in the copolymer of methacrylaldehyde with N,N-diethylacrylamide (r1 = 3,79, r2 = 0,14) the content of CH=O groups corresponds to that ot methacrylaldehyde units in the triads comonomer  -  methacrylaldehyde  -  comonomer; in the copolymer of methacrylaldehyde with N-ethylmethacrylamide (r1 = 4,07, r2 = 0,14) both comonomers react with each other and the content of CH=O groups is very low, while in the copolymer of methacrylaldehyde with 5-hydroxy-3-oxapentyl methacrylate (r1 = 1,48, r2 = 0,34) the majority of methacrylaldehyde units contain an unreacted CH=O group.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1980.021810207
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  • 4
    Electronic Resource
    Electronic Resource
    Aldehydes and acetals based on acryl- and methacrylamides as potential monomers (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 223-229 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Hydrophilic monomers containing aldehyde or acetal groups based on N-substituted amides of methacrylic and acrylic acid were prepared. The structure of these monomers prevents undesirable spontaneous intramolecular cyclization reactions of pendant aldehyde groups of the corresponding polymers. The following monomers were prepared: N-(2-formyl-2-methylpropyl)-N-methylmethacrylamide (3), N-(2,2-dimethoxyethyl)-N-methylmethacrylamide (5a), N-(2,2-dimethoxyethyl) methacrylamide (5b) and N-(2,2-dimethoxyethyl)-N-methylacrylamide (12).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021860202
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  • 5
    Electronic Resource
    Electronic Resource
    Polymers with aldehyde and acetal groups based on acryl- and methacrylamides (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 247-253 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A soluble hydrophilic polymer, poly[N-(2,2-dimethoxyethyl)methacrylamide] (4), and a crosslinked copolymer from N-(2,2-dimethoxyethyl)methacrylamide (3) and N,N′-methylenediacrylamide (5) were prepared by radical polymerization in solution. Soluble hydrophilic poly[N-(2,2-dimethoxyethyl)-N-methacrylamide] (8) and the copolymer from N-(2,2-dimethoxyethyl)-N-methylacrylamide (7) and (5) were prepared by the same procedure. Acetal groups of these polymers can be hydrolyzed with HCl. N,N-disubstituted methacrylamides, N(2-formyl-2-methylpropyl)-N-methylmethacrylamide (2) and N-(2,2-dimethoxyethyl)-N-methylmethacrylamide (1) do not undergo radical homopolymerization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021860204
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  • 6
    Electronic Resource
    Electronic Resource
    Aldehydes and acetals based on esters of methacrylic acid as potential monomers (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 215-222 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: New monomers containing aldehyde groups in the alcohol component of methacrylates were prepared. The structure of these monomers prevents undesired spontaneous intramolecular cyclization reactions of pendant aldehyde groups of the corresponding polymers. 2,2-Diethoxyethyl methacrylate (1) and its saturated analog, 2,2-diethoxyethyl pivalate (3) and 3,3-diethoxypropyl methacrylate (2) were prepared. The conditions for a selective hydrolysis of the acetal function of these compounds, leading to the corresponding aldehydes, were studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021860201
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  • 7
    Electronic Resource
    Electronic Resource
    Die radikalische copolymerisation in 3-stellung substituierter acryl- und methacrylaldehyde mit styrol (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 777-786 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Radical copolymerization of styrene (S) with crotonaldehyde (3-methylacrylaldehyde) (1a), cinnamaldehyde (1b), 2-methyl-3-phenylacrylaldehyde (1c), 3-(2-furyl)acrylaldehyde (1b), and 3-(2-furyl)-2-methylacrylaldehyde (1e) was studied. Monomer reactivity ratios (r1a = 0,45, rS = 15,5; r1b = 0,95, rS = 2,9; r1c = 0,04, rS = 13,0) were estimated. It was found that the polymerization of the substituted aldehydes is influenced by steric hindrance and by transfer reactions, and the polymerization rate decreases even at low concentrations of furyl derivatives in the monomer feed. The aldehyde monomers undergo copolymerization as other vinylic monomers except 1e. In the copolymer of 1e with styrene conjugate double bonds (C=O and C=C) were found. The structure of the copolymers is further complicated owing to a possibility of forming pyrane rings arising from neighbouring aldehyde units by cyclisation. The IR data are in good agreement with the statistical assumptions on the sequence length distribution of the monomeric units.
    Notes: Die radikalische Copolymeristion von Styrol (S) mit Crotonaldehyd (3-Methylacrylaldehyd) (1a), Zimtaldehyd (1b), 2-Methyl-3-phenylacrylaldehyd (1c), 3-(2-Furyl)acrylaldehyd (1d) und 3-(2-Furyl)-2-methylacrylaldehyd (1e) wurde untersucht. Dabei wurden die Copolymerisationsparameter für die Monomerenpaare (r1a = 0,45, rS = 15,5; r1b = 0,95, rS = 2,9; r1c = 0,04, rS = 13,0) bestimmt.Die substituierten Aldehyde vermindern die Polymerisationsgeschwindigkeit durch sterische Hinderung und übertragungsreaktionen, selbst bei geringen Konzentrationen an Furylderivaten im Monomergemisch. Die Copolymerisation der Aldehyd-Monomere verläuft wie bei anderen Vinylmonomeren, nur bei 1e wurde eine andere Art der Polyreaktion beobachtet. Dort findet man im Copolymer konjugierte C=O und C=C Bindungen. Die Struktur der Copolymeren wird auch durch die bekannten Cyclisierungsreaktionen von Aldehydgruppen zu Pyranringen kompliziert. Es wurde gefunden, daß der Reaktionsverlauf der Cyclisierung nach IR-Messungen in übereinstimmung mit den statistischen Voraussagen der Sequenzlängen-Verteilung von Copolymeren ist.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770316
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  • 8
    Electronic Resource
    Electronic Resource
    Polymers with aldehyde and acetal groups based on esters of methacrylic acid (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 231-245 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Soluble poly(2,2-diethoxyethyl methacrylate) (1a) was prepared by radical polymerization in solution. Copolymers from 2,2-diethoxyethyl methacrylate (3a), 2-hydroxyethyl methacrylate (4) and ethylene dimethacrylate (5) were prepared by suspension polymerization in the form of crosslinked beads (50-220 μm in diameter, specific surface area up to 38 m2/g). Acetal groups of these polymers resist direct hydrolysis, but can be transacetalized. Soluble poly(3,3-diethoxypropyl methacrylate) (1b) was prepared by radical polymerization in solution. Copolymers with 4 and 5 were prepared by suspension polymerization in the form of crosslinked beads (30 - 140 μm in diameter; specific surface area up to 46 m2). The polymers readily under go quantitative transcacetalization. Soluble poly(2-formylethyl methacrylate) (8) was prepared by radical polymerization in solution. Copolymers of 2-formylethyl methacrylate (7) with 4 and 5 were prepared by suspension polymerization in the bead form (diameter 75 - 350 μm; specific surface area up to 128 m2/g). The aldehyde group of these polymers is sensitive to oxidation in air. The content of aldehyde groups was measured spectrometrically and by reaction with 1,2-ethanedithiol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021860203
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  • 9
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    Pressure and temperature stability of the main apple allergen Mal d1 (2010)
    Springer
    Details
    Publication Date: 2010-10-15
    Print ISSN: 0175-7571
    Electronic ISSN: 1432-1017
    Topics: Biology , Physics
    Published by Springer
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  • 10
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    Surface Immobilized Protein Multilayers for Cell Seeding (2005)
    American Chemical Society
    Details
    Publication Date: 2005-08-01
    Print ISSN: 0743-7463
    Electronic ISSN: 1520-5827
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society
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