Cyanine


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Cyanine

 

any one of numerous organic compounds containing two heterocyclic radicals connected by a chain consisting of an odd number of methine groups:

where Y and Y’ are O, S, Se, CR2, or some other element or radical, R and R’ are H or van alkyl, X is Cl, Br, I, or some other anion, and n = 0–5.

The general name for this class of compounds is derived from the first compound of the class, bright blue cyanin, or cyanine blue (from the Greek kyanos, “blue”). Depending on the number of methine groups in the chain, a distinction is made between simple cyanines (monomethines), in which n = 0, carbocyanines (trimethines), in which n = 1, dicarbocyanines (pentamethines), in which n = 2, and so forth. The basic method for the synthesis of cyanines involves the condensation of quaternary salts of heterocyclic compounds. Cyanines are polymethine dyes.

References in periodicals archive ?
3] Nonstandard abbreviations: IAA, insulin autoantibody; GAD65, glutamic acid decarboxylase, 65-kDa isoform; IA-2, insulinoma-associated antigen 2; ZnT8, zinc transporter 8; DASP, Diabetes Antibody Standardization Program; NIR-FE, near-infrared fluorescence-enhanced; PEG, polyethyleneglycol; Cy, cyanine.
2) Study the photo-physical properties at the ensemble and single-molecule level of a new material, CyDNA (DNA highly substituted with cyanine dyes in a controllable way).
Improving upon 2-D electrophoresis, 2-D DIGE enables detection and quantitation of real biological differences in protein abundance between different samples using cyanine dye labelling with size- and charge-matched, spectrally resolvable CyDye DIGE Fluor minimal dyes.
To assess the stability of the cyanine dyes relative to the instrument stability, a homogeneous fluorescent material, SRM 2242, was incorporated into the study.
You may recall that SYBR Green I is an asymmetrical cyanine dye used as a nucleic acid stain in molecular biology.
Compared to cyanine and azo dyes found in the majority of CD-Rs on the market, the company continues, phthalocyanine dye lasts significantly longer when subjected to the harmful effects of UV light, heat, and humidity.
Total RNA was isolated from tumor and uninvolved tissue, reverse-transcribed into cDNA, and labeled with fluorescent dyes, either directly with Cyanine 3- or Cyanine 5-conjugated nucleotides or indirectly with Alexa 488 or Alexa 594 using a two-step method.
Molecular biology reagents including Cyanine 3 and Cyanine 5 labeled fluorescent nucleotide analogs, and miRNA Chemical Labeling Kits.
78 Stan-Tone 40MB10 Phthalo- cyanine blue, RS, NC 10.
Mitsui, which is under-appreciated as a player in the CD media business, was a pioneer (with Kodak) in offering a "gold" phthalocyanine dye recording layer that--independent tests generally confirm--enable a longer archival life than the earlier "green" cyanine dye layers do.
Both 80-minute and 74-minute Certified Plus CD-R discs use TDK's renowned IsoPure metal-stabilized cyanine recording dye for maximum data accuracy.