14,851 research outputs found
Estimation of specific growth rate from agitation speed in DO-stat culture
No full textA simple and effective method to estimate the specific growth rate estimation has been developed based on the observation of time changes in the agitation speed in dissolved oxygen(DO)-stat cultures of Brevibacterium ketoglutamicum. The estimation was compared with that using carbon dioxide evolution rate (CER). Estimated values of specific growth rates by both methods agreed well with the data directly calculated from cell concentration change although the use of agitation speed gave a slightly better result than CER
Characterization of individual block sizes of block copolymers by liquid chromatography at the chromatographic critical condition
No full textRecent progress is reported with customized polystyrene-b-polyisoprene diblock copolymers to critically examine the utility of the chromatographic critical condition for determination of the characteristics of individual block sizes.X113sci
Absorption spectra of two-level atoms interacting with a strong polychromatic pump field and an arbitrarily intense probe field
No full text©1999 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v60/p2547
DOI: 10.1103/PhysRevA.60.2547
PACS: 42.50.Gy, 32.80.-t, 42.50.HzA numerical method is introduced that solves the optical Bloch equations describing a two-level atom interacting with a strong polychromatic pump field with an equidistant spectrum and an arbitrarily intense monochromatic probe field. The method involves a transformation of the optical Bloch equations into a system of equations with time-independent coefficients at steady state via double harmonic expansion of the density-matrix elements, which is then solved by the method of matrix inversion. The solutions so obtained lead immediately to the determination of the polarization of the atomic medium and of the absorption and dispersion spectra. The method is applied to the case when the pump field is bichromatic and trichromatic, and the physical interpretation of the numerically computed spectra is given. [S1050-2947(99)10409-8].This research was supported in part by the Ministry of Science and Technology of Korea under Contract No. KRISS-98-0401-001 and by the Korea Atomic Energy Research Institute. One of the authors (T. H. Yoon) thanks Dr. S. A. Pulkin and J. R. Park for stimulating discussions
Rede uitgesproken op 17 september 1956 ter gelegenheid van de erepromotie van Dr. Th. von Karman door de promotor Dr. C.B. Biezeno
No full textRede uitgesproken door prof. C.B. Biezeno ter gelegenheid van de erepromotie aan de TH Delft van dr. Theodore von Karman.Precision and Microsystems EngineeringMechanical, Maritime and Materials Engineerin
Prof. Th. W. Adorno and the author Hans Erich Nossack.
No full textProf. Th. W. Adorno and the author Hans Erich Nossack at a reception of Insel Verlag, Buchmesse Frankfurt 1966LB
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
Full text linkThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
The interaction of estrogen receptor alpha and caveolin-3 regulates connexin43 phosphorylation in metabolic inhibition-treated rat cardiomyocytes.
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