Photorefractive grating formation with very short pulses: the bulk photovoltaic effect

1998 ◽  
Author(s):  
Hideki Okamura ◽  
Kazuo Takeuchi
Keyword(s):  
Photovoltaic Effect ◽  
Short Pulses ◽  
Very Short Pulses ◽  
Grating Formation ◽  
Photorefractive Grating

Grating formation with very short pulses in photorefractive materials: weak excitation limit

1997 ◽  
Vol 14 (10) ◽  
pp. 2650 ◽  
Author(s):  
Hideki Okamura ◽  
Kazuo Takeuchi ◽  
Takuya Tanaka ◽  
Kazuo Kuroda
Keyword(s):  
Short Pulses ◽  
Photorefractive Materials ◽  
Very Short Pulses ◽  
Grating Formation

scholarly journals LOCALIZATION OF MACROMOLECULES IN ESCHERICHIA COLI

1961 ◽  
Vol 9 (3) ◽  
pp. 539-553 ◽  
Author(s):  
Lucien G. Caro
Keyword(s):  
Escherichia Coli ◽  
Poisson Distribution ◽  
Cross Sections ◽  
Morphological Changes ◽  
Nuclear Region ◽  
High Concentration ◽  
Short Pulses ◽  
Thin Sections ◽  
Change Concerns ◽  
Very Short Pulses

If thin sections of Escherichia coli, labeled uniformly with tritium, are radioautographed calculations, based on the distribution of section sizes show that the number of H3 decays per section should be very close to a Poisson distribution. We might, therefore, expect that the distribution of radioautographic grain counts among random cross-sections should follow a Poisson distribution. It can then be inferred that a deviation from a Poisson indicates a high concentration of label in a preferred region. This region can then be identified by analysis of serial section and comparison with electron micrographs. Sections of cells labeled with leucine-H3 gave a Poisson distribution of grain counts, and it was concluded that proteins were distributed fairly uniformly throughout the cell. The situation was not changed if labeled cells were placed in chloramphenicol or if very short pulses of label were used. When Escherichia coli is grown in presence of chloramphenicol a major morphological change concerns the nuclear region: it becomes more regular in outline, nearly spherical, and occupies a smaller proportion of the cell length. The previously described association between DNA labeled with thymidine-H3 and the nuclear region was confirmed by showing that the distribution of the label in the cell followed exactly the morphological changes of the nuclear region. It was also shown that the concentration of DNA in the nuclear region was at least 45 times higher than that of the cytoplasm. Several morphological features of cells grown in chloramphenicol and examined in the electron microscope are discussed.

The response of 741 op amps to very short pulses

1980 ◽  
Vol 15 (5) ◽  
pp. 908-910 ◽  
Author(s):  
V.G. Ruediger ◽  
B.J. Hosticka
Keyword(s):  
Short Pulses ◽  
Op Amps ◽  
Very Short Pulses

Accurate measurements of the frequency dependence of photorefractive grating formation in Bi12SiO20

1994 ◽  
Vol 75 (10) ◽  
pp. 4873-4877 ◽  
Author(s):  
Jeffrey B. Norman ◽  
John H. Hong ◽  
Tallis Y. Chang
Keyword(s):  
Frequency Dependence ◽  
Grating Formation ◽  
Photorefractive Grating
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