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Topic: Luminophore

	Luminophore - Wikipedia, the free encyclopedia
		A luminophore is an atom or atomic grouping in a chemical compound that manifests luminescence.There exist organic and inorganic luminophores.
		The difference between luminophores belonging to these two subcategories is derived from the nature of the excited state responsible for the emission of photons.
		Some luminophores, however, cannot be classified as being exclusively fluorophores or phosphors and exist in the gray area in between.
	en.wikipedia.org /wiki/Luminophore (240 words)

	Flaw Detection (Site not responding. Last check: 2007-10-19)
		The luminophores used in penetrants must be readily soluble in common organic solvents, and the resulting solutions must luminesce intensely in thin films, exhibit good wetting and adsorbing capacity, be safe and inexpensive.
		An article to be inspected is immersed into a solution of the luminophore in petroleum ether; after the solvent has evaporated, defects produce blue luminescence, while the rest of the surface emits yellow light [4].
		Organic luminophores of the pyrazoline series are introduced into rubber-like compounds, which change the colour of their luminescence when exposed to aggressive media [36].
	www.isc.kharkov.com /english/isma/structure/patsenker/products/defect/defect.htm (3218 words)

	Device for analyzing immunoassays - Patent 6929943
		First reaction agents are dissolved in the assay medium in the vessel and are labeled with a luminophore or different luminophores and second reaction agents are bonded to the boundary surface within a boundary layer of the assay medium.
		A luminophore in the solution that is not bonded is not positioned in the field of evanescence of the light beam, is therefore not excited and consequently also does not emit photons.
		Since the amount of bonded luminophore is directly proportional to the originally existing amount of luminophore, the sensor arrangement makes it possible to make a quantitative determination of reactant in the solution, in real time and without additional washing and/or pipetting steps, except for the initial pipetting step.
	www.freepatentsonline.com /6929943.html (4377 words)

	ProcessOnline : feature articles (Site not responding. Last check: 2007-10-19)
		This is defined as the property of a luminophore to emit light that is produced due to excitation, utilising light energy for this excitation.
		Electrons within the luminophore are exited to a higher energy level, with the resulting difference in energy being re-emitted as radiation in the form of longer wavelength red light.
		As oxygen molecules contact the luminophore, they absorb energy from the electrons in the exited state, allowing them to return to their initial state with a corresponding reduction of emitted radiation.
	www.processonline.com.au /process/feature_article/item_082004b.asp (1243 words)

	Method of adjusting the colors of a polychrome plasma panel and a plasma panel using such a method - United States ...
		The luminophores then emit by photoluminescence a visible light whose color is determined by the nature of the luminophore.
		Thus, by modifying this holding frequency, the luminence due to each type of luminophore can be adjusted and so the plasma panel colors: the three red, green and blue luminophores which cover the three zones forming each elementary image point are shown by the references R, V, B and by respective hatching or cross ruling.
		By modifying the frequency of the holding signals applied to each type of luminophore, the amount of light due to each type of luminophore is modified and the combined colors of the panel can be adjusted, namely those which are obtained by exciting several luminophores of different types in an elementary image point.
	xrint.com /patents/us/5045846 (2325 words)

	ISTC - Luminescent titanium to replace silver
		In certain display tubes so-called cascade tubes are used, which consist of two layers of luminophores – a cathode-type and a photoluminophore.
		The cathodic luminophore, excited by an electron stream, begins to shine, its rays hit the photoluminophore, which also luminates, and for a fair time as well, for about six seconds, but considerably less brightly.
		Here the zirconium-titanium luminophore is 90 percent cheaper than the rare-earth versions.
	www.istc.ru /istc/sc.nsf/news/Luminescent-titanium.htm (188 words)

	"NEONPLAST" SRL \|Advertising > Neon advertising > Neon tubes
		The special structure lumin in tubes EGL provides high adhesion (luminophore it is not showered!), uniformity, brightness and a long luminescence of a neon tube, excepting scaling luminophore and dimness in places of soldering and a bend tubes.
		The special structure luminophore provides high adhesion (luminophore not shower!), uniformity, brightness and a long luminescence of a neon tube, excepting scaling luminophore and dimness in places of soldering and a bend tubes.
		As a result of submission of a pressure on electrodes and occurrence of an electric charge in a tube there is a process of ionization of gas to allocation of light both in visible to a human eye a range, and in the form of UV-beams.
	www.oracal.md /oracal-eng/reklama/index.php?p=p23 (2257 words)

	BD CONFERENCE, ABERDEEN, MARCH, 2002: PUBLICATION OF PROCEEDINGS
		For the classical luminophore technique, luminophores were deposited at the surface of sampled sediments that were incubated under controlled in situ-like conditions for 9 days.
		Luminophores were deposited at the sediment surface and cores incubated under controlled in situ-like conditions.
		This work has put in evidence how complementary are the two luminophore techniques we have used to study the sediment bio-reworking.
	www.abdn.ac.uk /ecosystem/conference/abstracts/gilbert.htm (286 words)

	bernhard_research
		Another publication by Malliaras and collaborators investigated energy transfer from the excited luminophore to the electrode surface, but a complete picture of the mechanisms and degeneration pathways involved is currently missing.
		In response to Bard's study that proposed photoinduced ligand dissociation as a potential degradation pathway, we prepared a family of hemicage ligands composed of three 2,2'-bipyridine moieties and a mesitylene spacer.
		The luminophores exhibit extraordinary photoluminescence properties (Quantum yields up to 32%), but their performance in light emitting devices was hampered by severely hindered charge transport through the luminophore layer.
	www.princeton.edu /~iridium/Bernhard_Research.htm (3246 words)

	Chemiluminescence History Summary (Site not responding. Last check: 2007-10-19)
		In electrochemiluminescent reactions, the emitting species, the luminophore, is excited to a higher electronic state by a charge-transfer reaction occurring at an electrode.
		A charge transfer reaction occurs in which the reduced and oxidized species combine to form two neutral molecules, one of which is in an excited state.
		The excited luminophore emits light as it move to its ground state.
	www.bookrags.com /history/chemistry/chemiluminescence-woc (560 words)

	ISA Seattle Monthly Meeting Report 03/97
		The thicker the paint, the greater the absorption of UV energy by the luminophore and, likewise, the greater the output of visible light.
		To compensate for variations in excitation caused by paint thickness and uneven illumination by the flashlamp, a second luminophore is mixed in with the paint to provide an output reference signal which is only proportional to the UV excitation.
		Another luminophore which is sensitive to temperature is mixed into the paint to provide a temperature reference signal at yet another visible wavelength.
	www.isa.org /~seattle/isar0397.htm (860 words)

	ISTC - A matrix for light (Site not responding. Last check: 2007-10-19)
		Such luminophores are good for optical sensors or in the production of signal lights.
		Latest-generation luminophores are made on the basis of rare-earth elements terbium and europium.
		The researchers introduced luminophore complexes into this structure, which served toreplace a part of the anions in the "negative" layers.
	www.istc.ru /istc/sc.nsf/news/science-news-matrix-for-light.htm (182 words)

	BSC Ekopal: MERCURY LAMPS UTILISATION
		Luminophore which contains mercury is aspirated from glass, which after being purified, is collected in a container.
		Purification of conveyor filters from an excess of luminophore is done by compressed air.
		The producer guarantees that 100 % generated during the process luminophore and used active coal would be receipted by mercury processing plants.
	www.ekopal.com.pl /util-e.html (1248 words)

	Luminescent lamps
		These lamps work in 50 Hz AC 127-220 V electrical mains, to which they are to be connected using the appropriate starting regulators.
		This low-pressure luminescent type of lamp is represented by a cylindrical glass bulb, the internal surface of which is coated with luminophore.
		The main source of optical radiation in this group of lamps comes from a layer of fluorescent material (luminophore) that is excited by the ultraviolet radiation of the mercury vapor's electric discharge.
	www.mrmz.ru /eng/electro/svet/lamp/lumin/lumin.htm (149 words)

	SPIE Bookstore
		For signaling the binding of the target analyte, we have inserted in the structure of the chemosensors different luminophores, such as dioxyxanthone derivatives, dansyl derivatives, ruthenium complexes, and hydroxyquinoline derivatives.
		In solution, the binding is always signaled by pronounced changes in the photophysical properties of the inserted luminophore such as emission wavelength and intensity, and excited state lifetime.
		The mechanism for the signal transduction strongly depends on the chosen receptor and luminophore moieties, and has been investigated in detail by means of steady state and time resolved spectroscopy.
	bookstore.spie.org /index.cfm?fuseaction=DetailPaper&ProductId=347554&coden= (260 words)

	Pressure Sensitive Paint measurements
		The active layer consists of luminescent molecules (luminophore) immobilized in a transparent oxygen-permeable matrix (binder).
		In some inorganic luminophores containing heavy metal atoms such as platinum or ruthenium, intersystem crossings can be as likely to occur as internal conversions.
		A quenching interaction with an excited luminophore is accomplished by energy transfer to the ground-state oxygen molecule, which usually raises it to one of its lowest-energy singlet states (Gouterman 1997).
	www.innssi.com /Chapter1.htm (6280 words)

	Measurements / Luminescent pressure transducers / LUMINESCENT PRESSURE SENSORS (LPS) (PRESSURE ...
		To exclude the influence of excitation light intensity and coating thickness to the measurement accuracy the ratio of reference image at known (wind-off) condition and operating image at unknown (wind-on) condition must be taken.
		Active and reference luminophores are excited by the same excitation light and emit luminescence of essentially different spectral range that makes it possible to separate them easily with optical glass filters.
		LRP is a paint containing luminophore molecules, whose luminescence is independent on pressure and temperature and is directly proportional to excitation light intensity.
	www.tsagi.ru /eng/areas/measurements/lumi-pressure/lps.htm (621 words)

	Molecular Near-field Optical Data Storage
		This supramolecular system is based on a Ru diimine complex covalently linked to a photochromic dianthryl molecule that serves as a triplet energy-transfer quencher in one of its photochromic states.
		luminophore in 1 is nearly quantitatively quenched when excited at visible wavelengths.
		The cyclised photoproduct, 2, can no longer quench the MLCT based excited states of the Ru luminophore through triplet energy transfer, resulting in a strong red emission.
	nmrc.ucc.ie /research/nanotechnology-group/research_topics/nanophotonics/mol_opt_nanodevices/mol_opt_data_storage.html (431 words)

	Inter Research » MEPS » v271 » p1-12
		The temporal variation in bioturbation for a subtidal macrofaunal assemblage was studied non-invasively and in situ using an optically modified fluorescence sensitive time-lapse sediment profile imaging camera (f-SPI), fluorescent-dyed sediment particles (luminophores) and mathematical modelling.
		This combined approach allowed tracer particles to be non-invasively tracked and their displacements monitored at an unprecedented spatial (78 µm) and temporal (every 10 min) resolution for extended periods of time (16 h).
		The redistribution of luminophores was digitally acquired from sequential images and compared to model predictions, with particle transport modelled as (1) a diffusive process, allowing the biodiffusion coefficient, D
	www.int-res.com /abstracts/meps/v271/p1-12 (437 words)

	esp@cenet document view
		The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region.
		According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrO x(Ba, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu<2+> and/or (2-x-y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu<2+>.
		The light source can contain an additional luminophore selected from the group of alkaline-earth aluminates, activated with bivalent europium and/or manganese, and/or can contain an additional red-emitting luminophore selected from the group Y(V, P, Si)O4:Eu or can contain alkaline-earth magnesium disilicate.
	v3.espacenet.com /textdoc?DB=EPODOC&IDX=WO02054502&F=0 (272 words)

	Synthetic Organic Fluorescent Brightening Agents or Luminophores: A 2004 Global Trade Perspective - World Market - ...
		The total level of imports and exports on a worldwide basis, and those for each region, is based on a model which aggregates across country markets and projects these to the current year.
		Synthetic Organic Fluorescent Brightening Agents or Luminophores as a category is defined in this report following the definition given by the United Nations Statistics Division Classification Registry using the Standard International Trade Classification, Revision 3 (SITC, Rev. 3).
		In such cases, the difference between the numbers given in this report and the numbers actually observed might be interpreted as the net loss or net gain due to these exogenous events affecting regular trade flows that would have occurred had these events not have taken place.
	www.researchandmarkets.com /reportinfo.asp?report_id=182143 (952 words)

	Immobilized HCPI as Solid Phase Luminophore in Peroxyoxalate Chemiluminescence - RPAC Group Abstract (Site not responding. Last check: 2007-10-19)
		A new luminophore for application in peroxyoxalate chemiluminescence is presented.
		By using this reagent in a solid phase detection reactor, sensitive determinations of hydrogen peroxide have been demonstrated.
		In homogeneous solution HCPI emits poorly as a result of 1,1’-oxalyldiimidazole excitation, but when immobilized, its efficiency is almost comparable to highly efficient luminophores such as 3-aminofluoranthene.
	www.anachem.umu.se /rpac/Abstracts/HCPI.html (174 words)

	Full Article
		In the present study experimental and literature data are presented suggesting that NAD(P)H/lucigenin-dependent chemiluminescence of microsomes is due to the reductase and (di)oxygenase activities of the enzymes of this subcellular fraction towards lucigenin.
		Evidently, in the latter case the quantum yield of chemiluminescence would be significantly higher because of lowered probability of non-radiative energy transfer on the heme of cytochrome P450.
		The possible activation of luminophores including analogs of luciferin and laser dyes [38] by the components of cytochrome P450 and oxidoreductases with wide substrate specificity should be considered during the development of new probes for registration of lipid peroxidation and production of reactive oxygen species.
	www.protein.bio.msu.ru /biokhimiya/contents/v64/full/64010034.html (4034 words)

	URC WEB: Reagentless Chemiluminescent Biosensors (Site not responding. Last check: 2007-10-19)
		Chemical additions which are required to achieve chemiluminescence are achieved by flow of a carrier stream through in-line solid phase modules for basification and controlled addition of the luminophore.
		This chemical carrier stream meets with the sample containing stream at the inlet to the electrocatalyzed chemiluminescence cell (ECL) where the light producing reaction between the luminophore and hydrogen peroxide is electrically initiated.
		In-line beds of immobilized enzymes are used to catalyze the oxidation of the analyte (ethanol, glucose, etc.) by O2 to produce hydrogen peroxide in direct proportion to the initial concentration of the analyte.
	www.urc.cc /b_sensor.htm (403 words)

	Home Page (Site not responding. Last check: 2007-10-19)
		Luminescent Pressure Sensor (LPS) (or Pressure Sensitive Paint (PSP)) is a key of new high effective aerodynamic research technology providing an opportunity to measure pressure field on all visible surface of the model in wind tunnel and calculate aerodynamic loads.
		The basis of Luminescent Pressure Sensitive Paint is an organic luminophore dispersed in oxygen-permeable polymer binder and glowing in the visible spectrum being illuminated by ultraviolet light.
		Since oxygen concentration is constant in the air, a change in air pressure results in a proportional change in oxygen concentration and a corresponding change in light intensity from the luminophore.
	www.progtech.ru /~optrod/Home10.htm (322 words)

	(WO/2001/093258) MULTILAYER RECORDABLE OPTICAL MEDIUM WITH FLUORESCENT READING (Site not responding. Last check: 2007-10-19)
		In a multilayer recordable optical medium, each recording layer includes a luminophore (202) that fluoresces under reading laser light and a quencher (203) capable of quenching the luminophore fluorescence.
		Initially, the luminophore and the quencher are not intermixed, so that the default state of the luminophore is fluorescent.
		During writing, focused writing radiation heats a spot in the medium so as to cause the luminophore and the quencher to be intermixed, thereby quenching the fluorescence.
	www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=01/93258.011206 (298 words)

	Irradiation detection and identification method and compositions useful therein - Patent 4992204
		As mentioned above, the fluorescent tags may be employed in the thermoplastic resins in a minor amount sufficient to provide the desired degree of light emission in the resin.
		Typically the amount of fluorescent tag employed may be from about 0.0001 percent to about 10 percent, preferably from about 0.02 percent to about 3 percent, and most preferably from about 0.01 to about 1.0 percent by weight based upon the overall weight of the resin composition.
		Blending the fluorescent tags of the present invention can be readily accomplished as the fluorescent tags are polymeric materials which may have substantially identical solubility characteristics, which are dictated by the nature of the polymeric chain.
	www.freepatentsonline.com /4992204.html (11720 words)

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