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Topic: Colorimetric


In the News (Wed 15 Feb 12)

  
  CiteULike: Colorimetric liposome lysis for assay of anti-streptolysin O antibody.   (Site not responding. Last check: 2007-11-02)
Colorimetric liposome lysis for assay of anti-streptolysin O antibody.
We developed an automated colorimetric assay based on liposome lysis for measurement of the titer of anti-streptolysin O antibodies (ASO) in human sera by using liposomes in which alkaline phosphatase (EC 3.1.3.1) was entrapped.
This automated colorimetric assay for ASO should be of use for diagnosing streptococcal infections.
www.citeulike.org /user/biblio24/article/804027   (301 words)

  
  Colorimetric Testing - Tech Tips: ® LaMotte Company
A colorimetric test is a test which forms a color.
To use a colorimeter for colorimetric testing, the color being measured must be proportional to the concentration of the substance being tested.
This means that a calibration for a colorimetric test must always be performed using the same pathlength.
www.lamotte.com /pages/common/techtips/colormet.html   (752 words)

  
 Method for determining colorimetric value - Patent 5740079   (Site not responding. Last check: 2007-11-02)
The obtained colorimetric values, however, have the disadvantage of fluctuations thereof depending on the temperature at which the measurement was taken, and thus generate an error.
The measurement operation of colorimetric value may be carried out by providing a built-in temperature sensor to equipment such as a spectrophotometer, colorimeter, or densitometer to detect the measurement temperature, and may be implemented by entering a specified temperature via the keyboard of the computer.
A colorimetric value of the target material sample is then measured at an arbitrary temperature and converted to the colorimetric value at the target temperature using the correction factor.
www.freepatentsonline.com /5740079.html   (3867 words)

  
 Colorimetric screening detects DNA, small molecules and proteins   (Site not responding. Last check: 2007-11-02)
Using the unusual color properties of gold at the nanoscale, scientists at Northwestern University have developed a "litmus test" for DNA and small molecule binding that eventually could be used by pharmaceutical companies to rapidly identify promising candidates for new anti-cancer drugs.
The detection system, called colorimetric screening, can be used to detect a variety of targets, such as DNA, small molecules and proteins, that bind to DNA, and the strength of the bond is indicated by a simple color change.
In a paper reported onlinein the Journal of the American Chemical Society (JACS), the research team used the colorimetric method to screen for molecules that can facilitate the formation of a special form of DNA called a triple helix.
www.news-medical.net /?id=17245   (823 words)

  
 High Resolution Colorimetric Mapping of the Turin Shroud
High resolution colorimetric mapping of the Turin Shroud, by means of digital acquisition with a solid state camera, is proposed with the aim of obtaining a database for future accurate analysis.
A century later, during the exhibition planned for next year, the first high resolution colorimetric mapping of the whole cloth may be achieved at various resolution levels.
High resolution colorimetric mapping of the Turin Shroud, by means of digital acquisition with a solid state camera, is proposed, with the aim of obtaining a data base for future accurate analyses.
www.shroud.com /fanti.htm   (1930 words)

  
 In Situ Colorimetric Analysis of Electrochromic Polymers and Devices   (Site not responding. Last check: 2007-11-02)
We report a colorimetric method for the in situ study of electrochromic polymers based on the CIE system of colorimetry.
This method is useful for the comparison of the electrochemical and optical properties of conjugated polymers, and for gaining control of the color of dual polymer electrochromic devices.
Twelve electrochromic polymers were investigated using in situ colorimetric analysis in order to define their CIE coordinates and electrochemical potential windows.
pubs.acs.org /cgi-bin/abstract.cgi/cmatex/2000/12/i06/abs/cm000097o.html   (251 words)

  
 DeadEndâ„¢ Colorimetric Apoptosis Detection System: Applications in Pathology
The genetic, molecular and morphological aspects of apoptosis currently are under intensive study because of the important role apoptosis has in development and homeostasis, as well as in several disease states.
Colorimetric TUNEL System (Cat.# G7130, G7360) labels fragmented DNA, one of the biochemical hallmarks of apoptosis.
This colorimetric system is ideal for labeling apoptotic nuclei in tissue sections and cultured cells, while allowing for a concurrent morphological assessment.
www.promega.com /nnotes/nn402/402_05.htm   (128 words)

  
 Multicenter Comparison of the Sensititre YeastOne Colorimetric Antifungal Panel with the NCCLS M27-A2 Reference Method ...
Multicenter Comparison of the Sensititre YeastOne Colorimetric Antifungal Panel with the NCCLS M27-A2 Reference Method for Testing New Antifungal Agents against Clinical Isolates of Candida spp.
Colorimetric MICs (at 24 and 48 h) of the six agents
Pfaller, M. A., Espinel-Ingroff, A., Jones, R. Clinical Evaluation of the Sensititre YeastOne Colorimetric Antifungal Plate for Antifungal Susceptibility Testing of the New Triazoles Voriconazole, Posaconazole, and Ravuconazole.
jcm.asm.org /cgi/content/full/42/2/718   (2276 words)

  
 Development of a tunable LED-based colorimetric source Journal of Research of the National Institute of Standards and ...
The tunable source can simulate standard sources and can be used as a transfer source to propagate photometric and colorimetric scales from calibrated reference instruments to test artifacts with minimal increase in uncertainty.
Detector-based photometric and tristimulus colorimetric scales have been realized on filtered trap-detectors where spectral corrections were introduced to perform high accuracy illuminance and color mea surements of sources with widely varying spectral distributions (6).
The high accuracy scales can be transferred to working standard and test meters utilizing the tunable LED source and adjusting its spectral distribution to approximate that of a specific test source.
www.findarticles.com /p/articles/mi_m0IKZ/is_4_107/ai_93988285   (744 words)

  
 Rapid Colorimetric Assay for Antimicrobial Susceptibility Testing of Pseudomonas aeruginosa -- Tunney et al. 48 (5): ...
The samples were incubated in the dark for 1 h at 37°C, after which a colorimetric change in the XTT reduction assay
Comparison of two rapid colorimetric methods for determining resistance of Mycobacterium tuberculosis to rifampin, isoniazid, and streptomycin in liquid medium.
The 2,3-bis(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT) assay as rapid colorimetric method for determination of antibiotic susceptibility of clinical Mycobacterium tuberculosis isolates in liquid medium.
aac.asm.org /cgi/content/full/48/5/1879   (2050 words)

  
 Biomimetic lipid/polymer colorimetric membranes: molecular and cooperative properties -- Kolusheva et al. 44 (1): 65 -- ...
A colorimetric assay for rapid screening of antimicrobial peptides.
Rapid colorimetric detection of antibody-epitope recognition at a biomimetic membrane interface.
A new colorimetric assay for studying and rapid screening of membrane penetration enhancers.
www.jlr.org /cgi/content/full/44/1/65   (3403 words)

  
 Clontech Laboratories, Inc. - January Clontechniques: BD Living Colors DsRed-Monomer Fluorescent Protein   (Site not responding. Last check: 2007-11-02)
Finally, detect the antibody bound to the transcription factor using the horseradish peroxidase conjugated secondary antibody and a colorimetric or chemiluminescent substrate.
After washing, HRP reacts with the added colorimetric or chemiluminescent substrate to produce an enzymatic product that can be detected with a standard colorimetric plate reader or a luminometer, respectively.
The BD TransFactor Universal Colorimetric and Chemiluminescent Kits yield consistent results when both are used to analyze a specific transcription factor (Figure 3 and data not shown).
www.clontech.com /clontech/archive/JAN05UPD/universal.shtml   (1074 words)

  
 Steve's Digicams - Tech Corner - July 2005
The down side to relative colorimetric intent is that we often have images that exceed the printer's gamut and when this happens, we may see banding (sometimes called posterization) of color in the prints.
Using relative colorimetric intent in this case should make the texture of the rock look more realistic and more defined because all of the colors in the photo are likely to be within the gamut of the printer due to the fact that they are not bright, saturated colors.
Simply put, using absolute colorimetric intent will usually result in awful color shifts because our eyes will try to adapt to the illuminant (white of the paper, color temperature of the monitor, etc.) and the same color may look different under different lighting.
www.steves-digicams.com /techcorner/July_2005.html   (2345 words)

  
 Colorimetric Fe Analysis
In the colorimetric analysis for Mn the concentration of the Mn is determined using the characteristic color of the permanganate ion.
The application of colorimetric reagents is not a new technique but dates back nearly two thousand years.
Around 60 A.D. Pliny the Elder in his "Natural History" recommended the use of nutgall as a reagent for the determination of iron in verdigris, which is a green pigment.
www.csudh.edu /oliver/che230/labmanual/iron.htm   (2326 words)

  
 ELISA/Assay Kits
Colorimetric sandwich ELISAs for many molecules including cytokines, chemokines, growth factors, adhesion molecules, and MMPs.
Colorimetric sandwich ELISAs for in vitro diagnostic use.
Colorimetric ELISA kits to detect and measure intracellular factors important for cell signaling.
www.rndsystems.com /product_detail_objectname_elisa_assay_product.aspx   (192 words)

  
 Colorimetric Assay of Gold - for recreational gold prospecting
Another means of measuring something is by what color it is. This could also be called spectrometric, but if you are measuring anything in the electromagnetic spectrum that happens to fall within the range that we can see with our eyeballs, it is called "colorimetric".
He further states that if you limit the range of your test severely, ie maybe only from 5 to 50 mg, the intensity of the color produced by the test will appear, for all practical purposes, to be linear.
That is 5mg of gold will produce a color 5 times as intense as 1 mg, or twice the intensity of 2.5 mg, etc. The only reason I mention this is that it is the basis for all colorimetric and spectrometric assays.
www.prospectorsparadise.com /html/colorimetric.html   (5141 words)

  
 E1455-03 Standard Practice for Obtaining Colorimetric Data from a Visual Display Unit Using Tristimulus Colorimeters
It explains a useful step in the analysis of colorimetric data that takes advantage of the fact that light from such displays consists of an additive mixture of three primary colored lights.
It is not concerned with effects that might cause measurement bias such as temporal or geometric differences between the instrument being optimized and the instrument used for reference.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
www.astm.org /DATABASE.CART/REDLINE_PAGES/E1455.htm   (297 words)

  
 PART 136 -- GUIDELINES ESTABLISHING TEST PROCEDURES FOR THE ANALYSIS OF POLLUTANTS
Particularly, if a colorimetric procedure is to be employed, it is necessary to ensure that all organo-metallic bonds be broken so that the metal is in a reactive state.
The colorimetric reaction is conducted at a pH of 10.00.2.
The approved methods are given on pp 576-81 of the 14th Edition: Method 510A for distillation, Method 510B for the manual colorimetric procedure, or Method 510C for the manual spectophotometric procedure.
www.dec.state.ny.us /website/dow/bwp/ref750/40cfr136.html   (7548 words)

  
 ProteoQwest Kits for Western Blotting
ProteoQwest Colorimetric Western Blotting Kit, TMB Substrate is designed for high sensitivity colorimetric detection of as little as 0.15 ng.
The ProteoQwest Colorimetric Western Blotting Kit, TMB Substrate is designed for high sensitvity, low background colorimetric detection of as little as 0.25 ng of protein.
The colorimetric reaction occurs directly on the PVDF or nitrocellulose membrane; no darkroom or film is needed.
www.sigmaaldrich.com /Area_of_Interest/Life_Science/Proteomics_and_Protein_Expr_/Protein_Analysis/Western_Blotting/ProteoQwest_Kits.html   (505 words)

  
 Microarray Scanner
Colorimetric Microarray Scanner is a high performance detection system at an incredibly affordable price.
Antibodies were diluted in 1X Protein Printing Buffer, printed in quintuplicate onto SuperProtein Substrates using a SpotBot, incubated with patient sera, stained with a secondary antibody conjugated to Alkaline Phosphatase (AP), and developed with an AP Developing Kit.
Colorimetric Microarray Scanner from the box and place it on the desk or laboratory bench.
arrayit.com /Products/MicroarrayI/Scanner/scanner.html   (2807 words)

  
 Available Techs: Colorimetric and Fluorescent Sensors for Rapid and Direct Detection of Influenza, E. coli and Other ...
Colorimetric and Fluorescent Sensors for Rapid and Direct Detection of Influenza, E.
Researchers at Berkeley Lab have developed colorimetric biosensors that can be used by a lay person for simple detection of viruses, bacteria, parasites and other pathogens.
The rate of detection is faster than with colorimetric sensors.
www.lbl.gov /tt/techs/lbnl0965.html   (559 words)

  
 High Resolution colorimetric image browsing on the Web
These come from the new generation of image acquisition systems in art galleries — the images are equivalent in resolution to a large-format transparency, but have accurate and consistent colour.
The colorimetric calibration also allows images to be compared properly, even between sites.
Browsing high resolution colorimetric images on the Web is possible with a reasonably fast network link (from say 1Mbit/s).
www7.scu.edu.au /1873/com1873.htm   (2777 words)

  
 Comparison of the Etest and the Sensititre Colorimetric Methods with the NCCLS Proposed Standard for Antifungal ...
Colorimetric method for susceptibility testing of voriconazole and other triazoles against Candida species.
Evaluation of a novel colorimetric broth microdilution method for antifungal susceptibility testing of yeast isolates.
Martin-Mazuelos, E., Peman, J., Valverde, A., Chaves, M., Serrano, M. C., Canton, E. Comparison of the Sensititre YeastOne colorimetric antifungal panel and Etest with the NCCLS M38-A method to determine the activity of amphotericin B and itraconazole against clinical isolates of Aspergillus spp..
jcm.asm.org /cgi/content/full/40/8/2876   (6663 words)

  
 IRB Applications: Manual Colorimetric Chloride Reagent - Weber State University   (Site not responding. Last check: 2007-11-02)
This project will provide guidance for the reproduction of a working in-house colorimetric chloride reagent for use in the clinical chemistry laboratory.
A cost effective, manual colorimetric chloride reagent will be prepared and validated for use on the Roche Cobas Mira S Chemistry Analyzer.
A manual colorimetric chloride method will be used.
www.weber.edu /DCHPResearch/IRB_Applications/IRB_App_Manual_Chloride.html   (545 words)

  
 Amazon.com: Acquisition and Reproduction of Color Images: Colorimetric and Multispectral Approaches: Books: Jon ...   (Site not responding. Last check: 2007-11-02)
To reach this goal it is necessary to understand and control the way in which the different devices involved in the entire color imaging chain treat colors.
Therefore we addressed the problem of colorimetric characterization of scanners and printers, providing efficient and colorimetrically accurate means of conversion between a device-independent color space such as the CIELAB space, and the device-dependent color spaces of a scanner and a printer.
An original method for the colorimetric characterization of a printer is then proposed.
www.amazon.com /Acquisition-Reproduction-Color-Images-Multispectral/dp/1581121350   (1018 words)

  
 A colorimetric method for point mutation detection using high-fidelity DNA ligase -- Li et al. 33 (19): e168 -- Nucleic ...
A colorimetric method for point mutation detection using high-fidelity DNA ligase -- Li et al.
A colorimetric method for point mutation detection using high-fidelity DNA ligase
Li, H.X. and Rothberg, L.J. (2004) Label-free colorimetric detection of specific sequences in genomic DNA amplified by the polymerase chain reaction J.
nar.oxfordjournals.org /cgi/content/full/33/19/e168   (3794 words)

  
 Colorimetric lithium analysis   (Site not responding. Last check: 2007-11-02)
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lithium-efficacy.evapills.net /colorimetric-lithium-analysis.html   (346 words)

  
 Colorimetric Veil Nebula
It is a composite of two color transforms, neither of which is HOT, but were inspired by discussions with Mike on how to accurately present his multiband recordings.
I consider this image to be colorimetrically correct, within the accuracy of my model for Mike's filter and detector, and the limits of the display to portray an sRGB image.
It is quite different from most images of the Veil, and my color processing will have to be confirmed in other tests, but the approach is from well-established principles in color science.
www.nightscapes.net /techniques/EmissionColors/ColorimetricVeil.html   (341 words)

  
 Surface and Skin Indicators for Colorimetric Screening of Contaminants
Formulated to be specific for compound groups such as amines and isocyanates, Swypes are sensitive to levels equal to or below permissible exposure levels for a comparable airborne exposure.
Once a colorimetric wipe pad, such as Swypes, determines the presence of a contaminant, a filter wipe sample can be taken and sent to a laboratory for confirmation and quantitative analysis.
For this reason, wipe sampling is an important part of analyzing worksites for hazardous conditions, in evaluating the effectiveness of PPE, housekeeping, and decontamination programs, and for assessing compliance with certain OSHA requirements.
www.skcinc.com /prod/dermal.asp   (981 words)

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