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  • Wiley-Blackwell  (12)
  • National Academy of Sciences  (4)
  • Nature Publishing Group  (2)
  • 1990-1994  (9)
  • 1980-1984  (9)
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Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Organic synthesis in the atmosphere of Titan (1981)
    [s.l.] : Nature Publishing Group
    Nature 293 (1981), S. 725-727 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Speculation on the processes which could contribute to the organic chemistry of Titan depend on the selection of the atmospheric model. The ground-based observation of C2H6, C2H4 and C2H2, along with the coloration of the planet, led to several competing models for the atmosphere. At one-extreme, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/293725a0
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  • 2
    Electronic Resource
    Electronic Resource
    High-affinity IgE receptor on eosinophils is involved in defence against parasites (1994)
    [s.l.] : Nature Publishing Group
    Nature 367 (1994), S. 183-186 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Highly purified eosinophils from hypereosinophilic patients were incubated with 125I-labelled monomeric human IgE together with increasing concentrations of the anti-FcsRI a-chain monoclonal antibody 15-1 (ref. 10) or with a control antibody, and the cell-bound radioactivity counted. The monoclonal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/367183a0
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  • 3
    Electronic Resource
    Electronic Resource
    Viscosity behavior of the polyelectrolyte poly(vinyl alcohol) having some intrachain crosslinks (1984)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 185 (1984), S. 167-172 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The viscosity behavior of aqueous poly(vinyl alcohol) (PVA)-borax-NaCl systems was investigated. The intrinsic viscosity [η] of PVA in borax solution increases with increasing borax concentration. In solutions containing both borax and NaCl, on the other hand, [η] decreases with increasing concentration of NaCl, and at high NaCl concentration phase separation is observed. In the absence of borax, [η] is nearly independent of the NaCl concentration. These results are interpreted in terms of a limited chain expansion due to charges and intrachain crosslinks simultaneously introduced in the PVA chain when the chain is complexed with negatively charged tetrahedral borate ions. The crosslinking density was estimated from the intrinsic viscosity [η]∞ at infinite ionic strength using the Kuhn and Majer equation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1984.021850115
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  • 4
    Electronic Resource
    Electronic Resource
    Photosynthetic regeneration of ATP using a strain of thermophilic blue-green algae (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 305-315 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Photosynthetic ATP accumulation was shown in the presence of exogenous ADP plus orthophosphate on illumination to the intact cells of a strain of thermophilic blue-green algae isolated from Matsue hot springs, Mastigocladus sp. Kinetic studies of various effectors on the ATP accumulation proved that the ATP synthesis depends mainly on the cyclic photophosphorylation system around photosystem I (PS-I) in the algal cells. The temperature and pH optima for the accumulation were found at 45°C and pH 7.5. Maximum yield was obtained with light intensity higher than 15 mW/cm2. Borate ion exerted pronounced enhancement on the ATP synthesis. With a continuous reactor at a flow rate of 1 ml/hr at 45°C and pH 7.5, efficient photoconversion of ADP (2mM, at substrate reservoir) to ATP (1mM, at product outlet) has been maintained for a period of 2.5 days, though the efficiency has decreased in a further 2-day period to the level of 0.5mM ATP/9.5 h of residence time.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260240205
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  • 5
    Electronic Resource
    Electronic Resource
    Dissociation of poly(allylammonium) cations in salt solutions (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 28 (1990), S. 233-240 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Potentiometric titration in various 1-1 salt solutions was carried out to study the dissociation behavior of the poly(allylammonium) cation (PAAH+). The titration curves show that proton release from cationic PAAH+ is markedly suppressed by addition of simple salt and depends on the counterion species. From an analysis of the titration curves it is found that the electrostatic free energy change ΔGel upon the proton release is negative in all systems examined, and its absolute value decreases with increasing ionic strength of the medium. Also, at a constant added salt concentration (0.1 mol L-1) ΔGel depends significantly on the counterion species added and increases in the order $\[ {\rm ClO}_{\rm 4}^ - 〉 {\rm NO}_3^ - 〉 {\rm Cl}^ - 〉 {\rm Br}^ - 〉 {\rm SCN}^ - 〉 {\rm I}^ - . \]$ The value of ΔGel correlates well with the electron donor constant En of the counterions. The dissociation behavior of PAAH+ is discussed in terms of electrostatic interaction among the ionized groups on the chain, the charge shielding effect, and the ion-solvent interaction of the added counterions.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1990.090280209
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  • 6
    Electronic Resource
    Electronic Resource
    Association of hydrophobic counterions in aqueous solution of poly(allylammonium) chloride: Comparison between p-n-propylbenzenesulfonate and p-iso-propylbenzenesulfonate ions (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 171-177 
    Details
    ISSN: 0887-6266
    Keywords: association of hydrophobic counterions in aqueous poly(allylammonium) chloride ; hydrophobicity and steric effect of alkyl groups on association of p-n-propylbenzenesulfonate and p-iso-propylbenzenesulfonate ions ; poly(allylammonium) cation ; conformation change and precipitation of ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The hydrophobic association behavior of p-propylbenzenesulfonate ions (n-PBS- and iso-PBS-) around poly(allylammonium) cation (PAAH+ was studied by absorption and 1H nuclear magnetic resonance (NMR) spectroscopy. In the presence of PAAH+Cl-, the broadening (hypochromism) of absorption band of PBS- were observed. In addition, all 1H NMR signals of PBS- exhibited up-field shift which resulted from the intermolecular ring current shift. These results indicate the hydrophobic association of negative PBS- around PAAH+. The hydrophobic association arises from the accumulation of counterions around the polyion, and is stabilized by the hydrophobic interaction between propyl groups and the stacking interaction between benzene rings. The association of iso-PBS- ions is rather weaker than that of n-PBS-, suggesting that the steric hindrance of isopropyl groups prevents an effective association of hydrophobic counterions. Furthermore, through viscosity and Cl- activity measurements, it was found that the binding of associated PBS-,s to PAAH+ causes the change of its surroundings to hydrophobic character and its conformation. © 1994 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320120
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  • 7
    Electronic Resource
    Electronic Resource
    Counterion binding to poly(allylammonium) cation (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 30 (1992), S. 587-590 
    Details
    ISSN: 0887-6266
    Keywords: poly(allylammonium) cation, counterion binding to ; ion activity in aqueous poly(allylamine) hydrochloride, binding and selectivity in ; polyelectrolytes, counterion binding and selectivity in solutions of ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Chloride ion activity coefficients in aqueous solutions of poly(allylamine) hydrochloride (PAA · HCl) have been determined both in the absence and the presence of simple salts. Without added salt, the activity coefficient depends on the polymer concentration. With added salt, the binding of added counterions by PAAH+ is evaluated from the release of chloride ion. The extent of interaction between counterions and PAAH+ at a given polymer concentration decreases in the order SO42- ≫ ClO4- 〉 NO3- 〉 Cl- 〉 Br- 〉 I-. This order of counterion selectivity agrees with the previous estimation of potentiometric titrations. The result shows that the hydration of the counterion, as well as its charge, plays an important part in counterion binding to the polyion.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1992.090300610
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  • 8
    Electronic Resource
    Electronic Resource
    Application and development of synthetic polymer membranes. VI. Pervaporation of aqueous ethanol solution through quaternized poly[3-(N′,N′-dimethyl) aminopropylacrylamide-co-acrylonitrile] membranes (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 2021-2032 
    Details
    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: Membranes obtained from polymers, quaternized poly[3-(N′,N′-dimethyl) aminopropylacrylamide-co-acrylonitrile]s, showed selective separation of water from aqueous ethanol solution by pervaporation. The separation factor toward water reached over 15,000. Membrane performance showed a good correlation to membrane polarity. Differential scanning calorimetric melting endotherms of the water-swollen membranes were studied to clarify the state of water in the membranes. The results suggested that there are two states of water in the membrane: bound and free. The higher the fraction of bound water in the membrane, clearly, the more preferentially was water permeated.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070431109
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  • 9
    Electronic Resource
    Electronic Resource
    Recovery of the contact site A glycoprotein of Dictyostelium discoideum from sodium dodecyl sulfatepolyacrylamide gel and characteristics of monoclonal antibodies against the recovered protein (1990)
    Weinheim : Wiley-Blackwell
    Electrophoresis 11 (1990), S. 856-860 
    Details
    ISSN: 0173-0835
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Monoclonal antibodies were produced against a cell-cell adhesion (contact site A) glycoprotein of Dictyostelium discoideum, isolated by preparative gel electrophoresis. The glycoprotein was recovered by electroelution from a polyacrylamide gel strip and used for the production of monoclonal antibodies. Four of the five antibodies obtained bound specifically to the protein moiety of the contact site A glycoprotein. The specificities of the antibodies were in striking contrast to those of antibodies raised against the contact site A glycoprotein purified by Triton X-114 phase separation and DEAE chromatography. The majority of the latter antibodies recognized the carbohydrate moiety of the contact site A glycoprotein and cross-reacted heavily with other membrane glycoproteins.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150111015
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  • 10
    Electronic Resource
    Electronic Resource
    Photoinduced electron transfer from polystyrene pendant tris(2,2′-bipyridyl)ruthenium (II) complex to methylviologen (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 1011-1019 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The characteristics of the photoinduced electron transfer reaction from polystyrene pendant tris(2,2′-bipyridyl)ruthenium (II) complex [Ru(bpy)32+] to methylviologen (MV2+) were studied. The rate constant k1 from the excited state of the complex, Ru(bpy)32+*, to MV2+ were determined for both the polymeric and monomeric complexes from the lifetime τ of Ru(bpy)32+* and the quenching rate of Ru(bpy)32+* by MV2+. The polymer pendant Ru(bpy)32+* showed three kinds of τ components ranging from 7 to 474 ns, in contrast to the monomeric complex, which showed one component of 350 ns. The k1 values for both complexes were almost the same, on the order of 108 L/mol s. The photoinduced electron transfer from solid-phase Ru(bpy)32+ to liquid-phase MV2+ was realized by utilizing the polymer complex, and the solid-liquid interphase reaction system is discussed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.170200410
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