stack'o'abstracts


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Posted by Catherine Cartwright Jones on September 7, 2002 at 20:34:53:

I just word doc'd a series of scientific papers on henna ... growth,
cultivaton techniques including hydroponic, array of molecules in the
leaf, skin and hair uptake, microbial inhibition ..........
I'll send the word doc to anyone who emails me and asks. (about 30
pages) The papers are probably impossible to lay hands on unless
you're in a university system, but these will at least tell you what
to go looking for if you can. And ... the abstracts DO tell you a bit
of what's going on!

Here's a sample:
FORESTIER J P
LAB. CHIMIE-BIOL., UNIV. PAUL-SABATIER, 118, ROUTE DE NARBONNE, 31062
TOULOUSE CEDEX, FR.
HENNA SORPTION OF LAWSONE BY HAIR
International Journal of Cosmetic Science. 4 (4) 4 1982. 153-174.
Henna : Sorption of lawsone by hair.Henna is the leaf of Lawsonia
inermis. From ancient times the extract has been used to dye nails,
hair, beards and palmar surfaces of hands and feet from orange to
copper red. TLC determination of extracts of hair treated by henna or
lawsone show that lawsone is the only coloring component of henna
although after extraction there were 3 other major components
revealed. The kinetics of extraction gave variable results depending
on whether the hair treatment was by henna or lawsone and also the age
of the sample. A new dynamic gravimetric method was used to determine
the absorption of henna and lawsone by hair. Results showed an initial
time-lag followed by an uptake proportional to (time)-2 rising to a
saturation level indicating a diffusion process. The dependence of
uptake on temperature also confirms this mechanism. Absorption was
changed with different types of hair, different hair colors and degree
of damage to hair. Lawsone was also extracted more quickly when the
origin of the lawsone in the hair was the pure material when compared
with color applied from henna. Tinnins also absorbed in competition
with henna and are more strongly adsorbed on the surface of the hair
while more henna than tannins absorbed in the interior of the fiber.
Although the mean mechanical strength of hair fiber treated with
lawsone did not change significantly, a wider spread of value was
obtained with treated hair. Photomicrography indicating some opening
of cuticle scales in treated hair. Results are presented showing an
indication that the lawsone has important sunscreen properties in the
hair. Results are presented for 3 qualities of henna indicating an
important difference in the quantity of chlorophyll present, this
being the principal difference between commercial grades.
* Radiation-Radiation Effects and Protective Measures * Bones, Joints,
Fasciae, Connective and Adipose Tissue-Physiology and Biochemistry *
Integumentary System-Physiology and Biochemistry * Pharmacology-Drug
Metabolism; Metabolic Stimulators * Pharmacology-Integumentary System,
Dental and Oral Biology * Plant Physiology, Biochemistry and
Biophysics-Chemical Constituents Cytology and Cytochemistry-Human
Biochemical Studies-General Biophysics-Molecular Properties and
Macromolecules Biophysics-Membrane Phenomena External Effects-Light
and Darkness Pathology, General and Miscellaneous-Therapy (1971- )
Pharmacology-Clinical Pharmacology (1972- ) Pharmacognosy and
Pharmaceutical Botany
LAWSONIA-INERMIS HUMAN DERMATOLOGICAL-DRUG HAIR DYE SUNSCREEN PHARMACO
KINETICS.
26310 86215.
Lythraceae. Hominidae.
French
76051829

 


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