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Digitale Medien

Bioleaching of cobalt from smelter wastes byThiobacillus ferrooxidans (1990)

Olson, Gregory J. ; Sakai, Craig K. ; Parks, E. J. ; [weitere]

Springer

Journal of industrial microbiology and biotechnology 6 (1990), S. 49-52

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ISSN: 1476-5535

Schlagwort(e): Leaching ; Metal recovery ; Strategic metal ; Cobalt ; Smelter waste ; Thiobacillus ferrooxidans

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Summary The bioleaching of cobalt from domestic, industrial smelter wastes was studied.Thiobacillus ferrooxidans solubilized Co from sulfidic dross furnace mattes. At pulp densities of 4% (w/v) up to 600 mg of Co per liter of leaching solution was released from nickel matte, corresponding to removal of about two-thirds of the original amount of Co in the matte. Bioleaching methods may be useful as a component of a process for solubilization and recovery of Co from sulfidic smelter mattes.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01576176

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Digitale Medien

Disposition of Sulfamethazine and N-Acetylsulfamethazine in the Rat (1991)

Svensson, Craig K. ; Zaher, Hani ; Tomilo, Mark

Springer

Pharmaceutical research 8 (1991), S. 1069-1070

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ISSN: 1573-904X

Schlagwort(e): acetylation ; N-acetylation ; pharmacokinetics ; sulfamethazine

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1015877612600

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Raman shifts due to variations in backbone planarity in a group of polydiacetylenes (1998)

Campbell, Alasdair J. ; Davies, Craig K. L. ; Batchelder, David N.

Weinheim : Wiley-Blackwell

Macromolecular Chemistry and Physics 199 (1998), S. 109-112

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ISSN: 1022-1352

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Polydiacetylene xBCMU and 9PA crystals, solutions and solution-cast films vary in colour due to differences in backbone order and planarity. Associated with the colour changes are increases in the Raman frequencies of the triple and double backbone bond vibrational modes from those values found in the highly ordered single crystals. These increases are strongly correlated and the ratio of the change in the frequency of the triple bond mode to that of the double bond mode is found to be 1.6 (±0.1) over a wide variation in order. This ratio is compared with the values of 0.3 found under uniform strain and 1.1 predicted by a model of acetylenic to butatrienic delocalisation. The relationship between the Raman frequencies of the yellow solutions and melts and those of the crystal phases suggests that in the former the backbone has a continuous and smoothly curving ‘worm-like’ conformation. Models involving the break-up of the conjugated system by large-angle bond rotations appear to be incorrect for polydiacetylenes. These results have important consequences for theoretical models that predict the dependence of electron delocalisation on backbone order and planarity in polydiacetylenes.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

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