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2. Juglone - Wikipedia

   en.wikipedia.org/wiki/Juglone

   The evidence that hydroxyjuglone is readily degraded is most apparent in the color change of walnut hulls from yellow to black after being freshly cut. [14] Indigenous bacteria found in the soil of black walnut roots, most notably Pseudomonas putida J1, are able to metabolize juglone and use it as their primary source of energy and carbon. [15]

3. Juglans nigra - Wikipedia

   en.wikipedia.org/wiki/Juglans_nigra

   Black walnut drupes contain juglone (5-hydroxy-1,4-naphthoquinone), plumbagin (yellow quinone pigments), and tannin. These compounds cause walnuts to stain cars, sidewalks, porches, and patios, in addition to the hands of anyone attempting to shell them. [41] The brownish-black dye was used by early American settlers to dye hair.

4. Natural dye - Wikipedia

   en.wikipedia.org/wiki/Natural_dye

   Black walnut (Juglans nigra) is used by Cherokee artists to produce a deep brown approaching black. [28] Today black walnut is primarily used to dye baskets but has been used in the past for fabrics and deerhide. Juniper, Juniperus monosperma, ashes provide brown and yellow dyes for Navajo people, [31] as do the hulls of wild walnuts (Juglans ...

5. List of dyes - Wikipedia

   en.wikipedia.org/wiki/List_of_dyes

   Basic dye 11050 azo 2869-83-2: Juglone: Oil red BS Black walnut Natural brown 7 75500 natural 481-39-0: Kaempferol: Rhamnolutein Natural yellow 13 75640 natural 520-18-3: Kermes: Kermesic acid: Natural red 3 75460 natural 18499-92-8: Lac: Shellac Laccaic acid Xanthokermesic acid Natural red 25 75450 natural 60687-93-6: Lanosol yellow 4G ...

6. Hair coloring - Wikipedia

   en.wikipedia.org/wiki/Hair_coloring

   A woman with dyed pink hair. Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads.The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching.

7. Juglans - Wikipedia

   en.wikipedia.org/wiki/Juglans

   Walnut trees are any species of tree in the plant genus Juglans, the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts.All species are deciduous trees, 10–40 metres (33–131 ft) tall, with pinnate leaves 200–900 millimetres (7.9–35.4 in), with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (Pterocarya), but not ...