Results 241 to 250 of about 2,292,381 (293)

Organizing the genome: enhancers and insulators

Biochemistry and Cell Biology, 2005
Enhancers can activate their target genes over large linear distances. Insulators can delimit the influence of an enhancer to an appropriate target. There are a number of intertwined mechanisms by which the regulatory functions of enhancers and insulators might be carried out at the level of the chromatin fiber.
Hui, Zhao, Ann, Dean
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Effects of Insulation Thickness on the Aging of Organic Insulation in Air

1955 CONFERENCE ON ELECTRICAL INSULATION, 1955
Organic insulations composed of paper or cloth base with phenolic or black asphaltic varnish impregnant are shown by extensive tests to have an aging rate in air dependent on the insulation thickness. A change in insulation thickness from that representative of turn insulation to that used for a major voltage barrier may increase its useful life in air
A L Scheideler
exaly   +2 more sources

Fluorescence quenching of organic molecule by insulator

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013
A new kind of fluorophore 2-(4-fluorophenyl)-1-phenyl-1H-benzo[d]imidazole (FPPBI) has been synthesized and characterized by (1)H NMR, (13)C NMR, mass spectral studies and single crystal XRD. The energy transfer from FPPBI to Al2O3 nanocrystals has been studied by absorption, fluorescence and lifetime spectroscopic methods.
C, Karunakaran, J, Jayabharathi, K, Jayamoorthy   +2 more
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Photo-Enhanced Currents in Organic Insulators

Physica Status Solidi (a), 1979
A general description is given of space-charge-limited photo-enhanced currents (PEC) in organic insulators. The model developed is based on the distribution function for the occupation of traps under simultaneous thermal and optical charge detrapping. The theoretical results satisfactorily reproduce all features of the experimental voltage and spectral
J. Godlewski, J. Kalinowski
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Nontracking organic insulations

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1956
A novel principle has been discovered which retards or completely eliminates the formation of conducting decomposition products in organic materials exposed to electric discharges. The application of this principle to several organic insulation materials has greatly increased their ability to withstand electric arcing.
R. S. Norman, R. A. Pfuntner, A. A. Kessel   +2 more
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Mechanism for nontracking organic insulations

Electrical Engineering, 1958
MOST ORGANIC INSULATIONS are not suitable for high voltage applications in contaminated atmospheres. Under surface arcing conditions, the organic constituents of the insulation decompose to form carbonaceous paths and the apparatus will fail by progressive creepage tracking.
R. S. Norman, A. A. Kessel
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Hydrophobicity of organic insulating materials

1988. Annual Report., Conference on Electrical Insulation and Dielectric Phenomena, 2003
The contact angle and the time for a water film to be formed on a surface are measured to investigate the hydrophobicity of UV (ultraviolet) irradiated materials. Ethylene propylene rubber and silicone rubber, both commonly used for graphic organic insulators, were adopted as specimens.
M. Ishii, M. Komatsubara
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Prediction of a Two-Dimensional Organic Topological Insulator

Nano Letters, 2013
Topological insulators (TI) are a class of materials exhibiting unique quantum transport properties with potential applications in spintronics and quantum computing. To date, all of the experimentally confirmed TIs are inorganic materials. Recent theories predicted the possible existence of organic TIs (OTI) in two-dimensional (2D) organometallic ...
Z F, Wang, Ninghai, Su, Feng, Liu
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Fluctuation analysis of an organic semiconductor–insulator interface

Physical Chemistry Chemical Physics, 2013
The space-charge region of an organic semiconductor (OS)-insulator interface is probed by analyzing the spontaneous, thermally driven drain current fluctuations of a field-effect transistor in which the OS forms the gate electrode. This so called "excess drain current noise" is the outcome of local fluctuations of the Fermi level, resulting from ...
Ryan M, West, Mira, Josowicz, Jiří, Janata   +2 more
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