ZIB

Digitale Medien

Heritable somaclonal variation in gliadin proteins of wheat plants derived from immature embryo callus culture (1986)

Cooper, D. B. ; Sears, R. G. ; Lookhart, G. L. ; [weitere]

Springer

Theoretical and applied genetics 71 (1986), S. 784-790

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ISSN: 1432-2242

Schlagwort(e): Tissue culture ; Electrophoresis ; Storage proteins ; Mutation ; Triticum aestivum

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary Fertile r0 plants of the winter wheat line ND7532 (Triticum aestivum L.) were regenerated from callus tissue after 60–190 days in culture. Seeds produced from these self-pollinated plants were planted in the field. Of the 5586 R1 plants, 32 differed for one or more agronomic traits from plants not passed through tissue culture process. Gliadin electrophoregrams were prepared from bulk samples of R2 seed from these 32 plants. Four of the 32 produced gliadin patterns different from controls, so 12 seeds of each of these four lines were examined individually. Three of the four mutant lines were fixed for the presence of a mutant protein of 50 relative mobility units (RMU) and the corresponding loss of a parental protein of 26 RMU. The remaining line segregated for the presence/absence of band 50 and the corresponding loss/retention of band 26. The mutant protein of 50 RMU was never seen in control plants. This indicated that either band 50 was coded for by a mutant gene allelic to the gene that coded for band 26 or that bands 26 and 50 were coded for by two different structural alleles under the control of a common regulatory locus. Each of the 12 seeds from the four mutant lines contained a prominent protein band at 30 (RMU), which was only observed as a faint band in one control seed. The types of variation in gliadin patterns observed in somaclones of ND7532 were similar to those reported for the line ‘Yaqui 50E’, except that, gliadin changes occurred less frequently in ND7532.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00276418

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Digitale Medien

Comparison of linear distributed-parameter filters to lumped approximants (1986)

Cooper, D. J. ; Ramirez, W. F. ; Clough, D. E.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 32 (1986), S. 186-194

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Optimal distributed-parameter filters are commonly implemented using approximating lumped Kalman filtering theory. The effect of such an approximation is investigated. A theoretical development shows that there is a loss in the spatial noise correlation for the lumped approximants. Two numerical examples of engineering significance illustrate that one result of this loss is slower filter convergence for the lumped approximants relative to the full distributed-parameter filters.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690320203

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Digitale Medien

Optimal, real-time monitoring of particle size distribution in a fluidized bed (1986)

Cooper, D. J. ; Clough, D. E.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 32 (1986), S. 389-396

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: A novel method for tracking particle size distribution dynamics in a fluidized bed yields on-line, real-time measurements of particle size distribution that are representative of actual conditions. These measurements are somewhat corrupted with noise (random error), however, and are available to the computer only at discrete time intervals. An optimal filtering algorithm combines the measurements with predictions from an idealized dynamic model to yield particle size distribution estimates that are not only on-line and real-time, but also virtually continuous and well-behaved.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690320305

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Digitale Medien

Real-time estimation of dynamic particle-size distributions in a fluidized bed: Theoretical foundation (1985)

Cooper, D. J. ; Clough, D. E.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 31 (1985), S. 1202-1212

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Significant noise (random error) is common in an on-line signal when measuring the particle size distribution in a fluidized bed. The application of optimal estimation theory to obtain a filtering algorithm that can rectify such measurements is detailed. Off-line simulation studies demonstrate that the filtering algorithm yields a measure of particle size distribution that is well-behaved, accurate, and able to track in real time as conditions change in the bed.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690310718

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Digitale Medien

Mechanism of production of ions in electrospray mass spectrometry (1993)

Ashton, D. S. ; Beddell, C. R. ; Cooper, D. J. ; [weitere]

Chichester : Wiley-Blackwell

Biological Mass Spectrometry 28 (1993), S. 721-728

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ISSN: 0030-493X

Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A mechanism for the production of multiply charged molecular ion species in electrospray mass spectrometry (ES-MS) is still required. A concise discussion of a recently published ionic solution equilibrium model offering a partial mechanism is presented. That publication proposed that the ion abundance-charge profile could be fitted by one or a series of superimposed Gaussian functions, in accord with a solution equilibrium model. It is shown that indeed a simulated mass spectrum based on a solution odel can compare well with the observed spectrum. However, some new and recently published experimental evidence is presented which shows that the ES mass spectra of many proteins give rise to multiply charged molecular ions which carry higher charges than those calculated by the model. Further, the ion abundance-charge profile is very sensitive to some experimental parameters, e.g. cone voltage; it does not necessarily reflect the solution or gaseous ion populations in the mass spectrometer source. Therefore, the concept that gaseous multi-charged ions originate from equivalently charged solvated ions in electrically neutral solution must be treated with caution.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/oms.1210280612

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