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Showing 1 to 20 of 1275 for “"dye"”.
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Dye regeneration kinetics in dye sensitized solar cells studied by scanning electrochemical microscopy
In dieser Dissertation wird eine Reihe von Experimenten vorgestellt, die sich mit lokalen Messungen der Farbstoffregenrationskinetik befassen. Die Reduktion der intermediär gebildeten photooxidierten Farbstoffmoleküle durch Iodidiionen aus der Lösung wurde mit Hilfe eines elektrochemischen …
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Biological Treatment of a Synthetic Dye Water and an Industrial Textile Wastewater Containing Azo Dye Compounds
… biological sludges to reduce and stabilize azo dye compounds was studied. Synthetic dye solutions and an industrial textile wastewater were both treated using anaerobic and aerobic biomass, separately and in sequential step-treatment processes. The primary objective was to reduce the wastewater …
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Cochineal : a bright red animal dye.
The natural red animal dye cochineal has been in use for at least three thousand years. It was one of the ten most frequently used ancient dyes. Cochineal was used by the Aztec, Mixtec, and Zapotec Indians when Cortez arrived in the New World. It has always been very valuable to the indigenous who …
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Studies of interaction of dye molecules with TiO2 Brookite clusters for application in dye sensitized solar cells
Dye sensitized solar cells (DSSCs) have attracted rapid interest over the recent years with prospect of emerging as a viable alternative to conventional silicon based solar cells. The photoanode of DSSCs comprises of dye molecules anchored to the surface of semiconductors such as TiO2. However, the …
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Effects of Metallic Nanoalloys on Dye Fluorescence
… and the photostability of many fluorescent dye molecules. Metal enhanced fluorescence (MEF) is therefore widely investigated for biosensing applications. When used in immunoassays, silver island films (SIFs) could augment the fluorescence intensity of fluorescein by a factor of seventeen; …
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Dye sensitized photooxidation of toxic organic wastewaters
Use of dye sensitized photooxidation is potentially a low cost means of degrading many of the hazardous compounds found in wastewaters. This study investigated the use of methylene blue as a sensitizer to degrade ortho-, meta-, and para-cresol, carbofuran and acrylonitrile. Significant reductions …
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Commercialization potential of dye-sensitized mesoscopic solar cells
… the world's fastest growing energy market. Dye-sensitized solar cells (DSCs) are photoelectrochemical cells which mimic the natural photosynthesis process to generate solar electricity. Typically, a monolayer of dye sensitizer molecules is anchored onto a semiconductor mesoporous film such …
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Frequency stabilization for a 486nm dye-ring laser
… to provide frequency stabilization to a 486nm dye-ring laser. After a doubling cavity doubles the frequency to 243nm, the laser beam is used to excite ground state hydrogen to the 2S state: the first step of an experiment to accurately measure the 2S-NS transitions of hydrogen and measure the …
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Anaerobic/aerobic degradation of a textile dye wastewater
… to the development of new, more stable textile dyes. These dyes, many of the azo type, are often incompletely degraded/removed in wastewater treatment plants, leading to the discharge of highly colored effluents to rivers and streams. Concerns by downstream users of that water have led to …
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Optical Characterization and Evaluation of Dye-Nanoparticle Interactions
… of gold and silver nanoparticles in an aqueous dye solution. Our research is the basis for developing an optical sensor used for water treatment centers as an alarm mechanism. Due to the inefficiency of the fluorophore used in similar optodes, sufficient fluorescence was not obtained. With the …
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Carrier concentration and dye type effect on carrier and dye uptake of dacron type 54 yarn in disperse dyeing of polyester
The effect of carrier concentration and dye type on carrier and dye uptake of Dacron type 54 yarn was determined. Disperse Red 60 and Disperse Yellow 54 dyes were used. 0-phenyl phenol was used with six different concentrations of this carrier (0, 1, 2, 3, 4 and 5 gm/l). Spun Dacron type 54 …
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Dye Marking of Antibiotics Used in Treatment of Mastitis
… methods. Mastitis remedies containing marker dyes are infused into a cow's udder. For effective indirect control, the dye is excreted in milk with endpoints equal to those of the antibiotic. The potential advantage of dye marking is that it immediately alerts the dairy farmer to antibiotic …
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Organic Sensitizers for High Efficiency Dye-Sensitized Solar Cells
… sunlight for electricity production with dye-sensitized solar cells (DSCs). DSCs are an attractive solar technology due to processing advantages over traditional solar cells. To improve the stability of DSCs, strong surface binding dyes are important. This work studies the dual anchor dual …
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Solar Driven Hydrogen Generation with Dye-Sensitised CuCrO2 Photocathodes
… to fossil fuels. Inspired by natural processes, dye-sensitised photoelectrochemical cells provide a platform for H2 generation from water. Fuel-forming photocathodes are currently limited by the small range of wide-bandgap p-type semiconductors available. The majority of previous reports have …
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The Emergence of The German Dye Industry to 1925
Made available in DSpace on 2015-05-12T17:07:44Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0019797.PDF: 15829738 bytes, checksum: 22aaf48aa04875f06d7b2e5c944b8e06 (MD5) Previous issue date: 1956
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