cyanine , auch: cyanin

Cyanine is a non-systematic name of a synthetic dye family belonging to polymethine group.

Brooker, Keyes, et al.: "Studies in the Cyanine Dye Series.

A method using Solochrome Cyanine R is stated to have shown promise for the control of aluminium residues in the treatment of water with alum.

The earlier models were very chemically unstable and this made cyanine based discs unsuitable for archival use; they could fade and become unreadable in a few years.

However, there is a limited amount of commercially available fluorescent dyes, with only a limited amount of environmentally sensitive dyes, such as cyanine cy7.

There are many hybrid variations of the dye formulations, such as Formazan by Kodak (a hybrid of cyanine and phthalocyanine).

Other historically common fluorophores are derivatives of rhodamine (TRITC), coumarin, and cyanine.

Unlike cyanine, phthalocyanine is less resistant to UV rays and CD-Rs based on this dye show signs of degradation only after two weeks of direct sunlight exposure.

"Because I might kill you in your sleep," she said, and closed her eyes, which seemed to change from cornflower-blue to cyanine and then to purple madder just as her eyelids slipped shut.

Although the additives used have made cyanine more stable, it is still the most sensitive of the dyes in UV rays (showing signs of degradation within a week of direct sunlight exposure).

DiI (CAS number 41085-99-8), also called D282 and DiIC(3), is a fluorescent lipophilic cationic indocarbo cyanine dye which is usually made as a perchlorate salt.

CD-R's made with cyanine, a dye that gives them a greenish color, are thought to last 70 to 100 years, while gold-colored discs made with phthalocyanine dye have a life expectancy of 200 years, based on accelerated-age testing.

Many manufacturers like Taiyo Yuden use proprietary chemical additives to make more stable cyanine discs ("metal stabilized Cyanine", "Super Cyanine").

Alizarin in the most common usage of the term has a deep red color, but the term is also part of the name for several related non-red dyes, such as Alizarine Cyanine Green and Alizarine Brilliant Blue.

DNA from the sample to be tested is labeled with a green fluorophore (Cyanine 3) and a reference DNA sample is labeled with red fluorophore (Cyanine 5).

Older cyanine dye based CD-Rs, as well as all the hybrid dyes based on cyanine, were very sensitive to UV-rays and could have become unreadable after only a few days if they were exposed to direct sunlight.