Blue note

In jazz and blues, a blue note (also "worried" note) is a note that—for expressive purposes—is sung or played at a slightly different pitch than standard. Typically the alteration is between a quartertone and a semitone, but this varies among performers and genres.

Origins and meaning

Blue notes are usually said to be the lowered third, lowered fifth, and lowered seventh scale degrees. The lowered fifth is also known as the raised fourth. Though the blues scale has "an inherent minor tonality, it is commonly 'forced' over major-key chord changes, resulting in a distinctively dissonant conflict of tonalities". A similar conflict occurs between the notes of the minor scale and the minor blues scale, as heard in songs such as "Why Don't You Do Right?", "Happy" and "Sweet About Me".

In the case of the lowered third over the root (or the lowered seventh over the dominant), the resulting chord is a neutral mixed third chord.

Blue notes are used in many blues songs, in jazz, and in conventional popular songs with a "blue" feeling, such as Harold Arlen's "Stormy Weather." Country blues feature wide variations from the diatonic pitches with emotive blue-notes. Blue notes are also prevalent in English folk music. Bent or "blue notes", called in Ireland "long notes", play a vital part in Irish music.

Blue Note Records

Blue Note Records is an American jazz record label, established in 1939 by Alfred Lion and Max Margulis. Francis Wolff became involved shortly afterwards. It derives its name from the characteristic "blue notes" of jazz and the blues.

Originally dedicated to recording traditional jazz and small group swing, from 1947 the label began to switch its attention to modern jazz. While the original company did not itself record many of the pioneers of bebop, significant exceptions are Thelonious Monk, Fats Navarro and Bud Powell.

Historically, Blue Note has principally been associated with the "hard bop" style of jazz (mixing bebop with other forms of music including soul, blues, rhythm and blues and gospel), but also recorded essential albums in the avant-garde and free styles of jazz. Horace Silver, Jimmy Smith, Freddie Hubbard, Lee Morgan, Art Blakey, Grant Green, Hank Mobley, Wayne Shorter, Bobby Hutcherson, and Jackie McLean were among the label's leading artists. During its heyday, the 1950s and 60s, the photography and graphic art of Reid Miles created a series of iconic album covers, often incorporating session photos by Wolff, which added to Blue Note's artistic reputation.

Catechol 1,2-dioxygenase

Catechol 1,2- dioxygenase (EC 1.13.11.1, 1,2-CTD, catechol-oxygen 1,2-oxidoreductase, 1,2-pyrocatechase, catechase, catechol 1,2-oxygenase, catechol dioxygenase, pyrocatechase, pyrocatechol 1,2-dioxygenase, CD I, CD II) is an enzyme that catalyzes the oxidative ring cleavage of catechol to form cis,cis-muconic acid:

More specifically, 1,2-CTD is an intradiol dioxygenase, a family of catechol dioxygenases that cleaves the bond between the phenolic hydroxyl groups of catechol using an Fe³⁺ cofactor.

Thus far, 1,2-CTD has been observed to exist in the following species of soil bacteria: Pseudomonas sp.,Pseudomonas fluorescens,Aspergillus niger,Brevibacterium fuscum,Acinetobacter calcoaceticus,Trichosporon cutaneum, Rhodococcus erythropolis,Frateuria sp.,Rhizobium trifolii,Pseudomonas putida,Candida tropicalis,Candida maltose,Rhizobium leguminosarum, and Nocardia sp.. These bacteria subsequently employ 1,2-CTD in the last step of the degradation of aromatic compounds to aliphatic products.

Blue

Blue is the colour between violet and green on the optical spectrum of visible light. Human eyes perceive blue when observing light with a wavelength between 450 and 495 nanometres. Blues with a higher frequency and thus a shorter wavelength gradually look more violet, while those with a lower frequency and a longer wavelength gradually appear more green. Pure blue, in the middle, has a wavelength of 470 nanometres. In painting and traditional colour theory, blue is one of the three primary colours of pigments, along with red and yellow, which can be mixed to form a wide gamut of colours. Red and blue mixed together form violet, blue and yellow together form green. Blue is also a primary colour in the RGB colour model, used to create all the colours on the screen of a television or computer monitor.

The modern English word blue comes from Middle English bleu or blewe, from the Old French bleu, a word of Germanic origin, related to the Old High German word blao. The clear sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. When sunlight passes through the atmosphere, the blue wavelengths are scattered more widely by the oxygen and nitrogen molecules, and more blue comes to our eyes. Rayleigh scattering also explains blue eyes; there is no blue pigment in blue eyes. Distant objects appear more blue because of another optical effect called atmospheric perspective.

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