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Digitale Medien

The interfringe intensity in coronal interferograms (1994)

RAJU, K. P. ; DESAI, J. N.

Springer

Experimental astronomy 5 (1994), S. 289-299

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ISSN: 1572-9508

Schlagwort(e): Astronomical Instrumentation ; Sun: corona

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The paper discusses the low contrast of the Fabry-Perot (FP) fringes observed in the interferograms of the solar corona. The various factors which affect the interfringe intensity of Fabry-Pérot line profiles are considered. The effect of continuum radiation on the interfringe intensity of Fabry-Pérot line profiles is calculated by assuming a coronal model. For the given FP, it was found that unless the ratio of line to continuum intensity (integrated line intensity to continuum per angström) is less than 10, continuum contribution has no significant effect on the fringe contrast. The analysis may be pertinent in the design aspects of a FP interferometer for astronomical observations. The excess interfringe intensity found in the coronal line profiles is interpreted as due to the presence of fast moving plasma components in corona along the line of sight. A detailed analysis qualitatively shows that the line excitation conditions existing in ambient corona and coronal loops are different in active regions while they are more similar in polar regions.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01583702

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Digitale Medien

Purification and properties of extracellular β-glucosidase from Scytalidium lignicola (1983)

Desai, J. D. ; Ray, R. M. ; Patel, N. P.

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 25 (1983), S. 307-313

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260250123

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Digitale Medien

Effect of melanin on enzymatic hydrolysis of cellulosic waste (1984)

Ray, R. M. ; Desai, J. D.

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 26 (1984), S. 699-701

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Wood waste powder from Tectona grandis containing melanin was less susceptible to enzymatic hydrolysis than powder without melanin. About a 53% increase in saccharification was noted when melanin was removed. Melanin caused inhibition to all cellulolytic enzymes, but in different degrees. Endo-β-1,4-glucanase and β-glucosidase were markedly inhibited when melanin was preincubated with enzyme, while exo-β-1,4-glucanase was severely inhibited when melanin was preincubated with substrate. The latter was found to be dependent on the contact time. The activities of endo-β-1,4-glucanase and β-glucosidase were noncompetitively inhibited by melanin.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260260711

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