GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Effect of support material and enzyme pretreatment on enantioselectivity of immobilized subtilisin in organic solvents (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 44 (1994), S. 1265-1269 
    Details
    ISSN: 0006-3592
    Keywords: subtilisin ; organic solvents ; immobilized enzyme ; aquaphilicity ; hydrophilicity ; enantioselectivity ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Subtilisin Carlsberg was covalently attached to five macroporous acrylic supports of varying aquaphilicity (a measure of hydrophilicity). Kinetic parameters of the transesterification of S and R enantiomers of secphenethyl alcohol with vinyl butyrate, catalyzed by various immobilized subtilisins, were determined in anhydrous dioxane and acetonitrile. Enzyme enantioselectivity in acetonitrile, but not in dioxane, correlated with the aquaphilicity of the support; a mechanistic rationale for this phenomenon was proposed. Although the catalytic activity of immobilized subtilisin in anhydrous solvents strongly depended on enzyme pretreatment, the enantioselectivity was essential conserved. © 1994 John Wiley & Sons, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260441015
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Correlating diffusion coefficients in concentrated carbohydrate solutions (1985)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 773-780 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The diffusivities and the vapor-liquid equilibrium coefficients of two organic components, 1-hexanol and 2-butanone, were measured in concentrated maltodextrin solutions using newly developed techniques. Accurate determination of these quantities required complete material balances of the two phases and control of the water concentration in the experimental cell. The diffusion coefficients of these solutes correlated with solution viscosity to the 1/2 power over a range of temperatures and concentrations. Other literature data for diffusion coefficients in concentrated malto-dextrin and sugar solutions are shown to correlate with viscosity.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690310511
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Loss of 2-tertiary-butyl-4-methoxy phenol (BHA) from high-density polyethylene film (1987)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 27 (1987), S. 934-938 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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 rate of loss of the antioxidant 2-tertiary-butyl-4-methoxy phenol (BHA) from high-density polyethylene (HDPE) was determined using high pressure liquid chromatography (HPLC). The rate of loss was found to follow a first-order expression. Almost all of the antioxidant was lost (〉95 percent) within 1 day at 50°C, within 3 days at 40°C, and within 7 days at 30°C. The controlling parameter for mass transfer of the antioxidant was found to be volatilization rather than diffusion.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760271303
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Thermal properties of some di(4-substituted phenyl)tin dichloride complexes with nitrogen donor ligands (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 2 (1988), S. 469-473 
    Details
    ISSN: 0268-2605
    Keywords: Organotin complexes ; aryltin chlorides ; differential thermal analysis ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The thermal properties of some organotin complexes of general structure (4-ZC6H4)2SnCl2.L2 (Z=Me, CF3, F, Cl, OMe and H; L2 = 2,2′ -bipyridyl and 4,4′ -dimethyl-2,2′ -bipyridyl) are reported. The thermal data obtained by Differential Thermal Analysis (DTA) for these complexes is reported. Thermal decomposition experiments for some of the complexes are described and indicate a disproportionation of the complexes into the aryltin trichloride complex and the triaryltin chloride. The controlled decomposition provides a possible alternative preparative route to some aryltin trichloride complexes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590020510
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Structural effects on the antitumour activity of organotin compounds 2. Further diaryltin dichloride complexes with nitrogen-donor ligands (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 5 (1991), S. 439-441 
    Details
    ISSN: 0268-2605
    Keywords: Organotin complexes ; antitumour agents ; aryltin chlorides ; murine P388 leukaemia ; Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis and investigation of the anti-tumour activity of a further series of six new diorganotin dichloride complexes Ar2SnCl2.L2, where Ar = 2-thienyl, 2,4-dimethoxyphenyl, 4-methyoxyphenyl, 4-methylphenyl or 4-trifluoromethylphenyl and L2 = 2-(2-pyridyl)benzimidazole (PBI) or 2-amino-methylpyridine (AMP), is reported. One of these complexes was found to be active against P388 lymphocytic leukaemia in mice. The results obtained are in general agreement with previously published work. The activity of the diaryltin dichloride complexes is shown to be dependent on the electronic effect of the aromatic group. The use of PBI as a ligand, however, shows no advantage over other ligands used in the series investigated.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590050512
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The synthesis and tin-119m Mössbauer spectra of a series of di (4-substituted phenyl) tin dichloride complexes with nitrogen-donor ligands (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 1 (1987), S. 261-265 
    Details
    ISSN: 0268-2605
    Keywords: Organotin complexes ; Mössbauer spectra ; Anti-tumour agents ; Aryltin chlorides ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis and 119mSn Mössbauer spectra of a series of 12 new and 3 other organotin complexes of general structure (4-ZC6H4)2SnCl2.L2.(Z = CH3, CF3, F, Cl, OCH3, L2=2,2′-bipyridyl, 1,10-phenanthroline, 2-aminomethylpyridine) arereported. A convenient method for the preparation of the intermediate diaryltin(IV) dihalides is given. The complexes fall into two isomeric types with either a trans- or cis-[ArSnAr] geometry. For this series 2-aminomethylpyridine gives exclusively the cis-[ArSnAr] geometry in its complexes.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590010308
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...