Chapter 6 221 20. D Hrdy, HB Bayden, Biochemical variations or hair keratins in man and non-primates, Am J Phys Anthrop 39 19-24 (1973). 21. RI Spearman, NA Barnicot, A study of bilaterality of human hair, Am J Phys Anthrop 18 91-96 (1960). 22. JA Swift, Morphology and histochemistry of human hair, Formation and Structure of Human Hair, pp 149-175, P Jolles, H Zahn, and H Hoecker, eds., Birkhausser Verlag, Basel (1997) . 23. S Nagase, M Tsuchiya, T Matsui, S Shibuichi, H Tsujimura, Y Masukawa, N Satoh, T Itou, K Koike, K Tsujii, Characterization of curved hair of Japanese women with reference to internal structures and amino acid composition, J Cosmet Sci 59 317-332 (2008). 24. S Thibaut, P Barbarat, F Leroy, B Bernard, Human hair keratin network and curvature, Intl J Dermatol 46(suppl. 1) 7-10 (2007). 25. C Nappe, M Kermici, Electrophoretic analysis of alkylated proteins of human hair from various ethnic groups, J Soc Cosmet Chem 40 91-99 (1989). 26. S Dekio, J Jidol, Amounts of fibrous and matrix substances in hairs of different races, J Dermatol 17 62-4 (1990). 27. C Porter, F Dixon, C Khine, B Pistorio, H Bryant, R de la Mettrie, The behavior of hair from different countries, J Cosmet Sci 60 97-109 (2009). 28. N Nicolaides, S Rothman, Studies on the chemical composition of human hair fat II: The overall composition with regards to age, sex, and race, J Invest Dermat 21 9-12 (1953). 29. L Kreplak, F Briki, Y Duvault, J Doucet, C Merigoux, F Leroy, JL Leveque, L Miller, GL Carr, P Willams, P Dumas, Profiling lipids across Caucasian and Afro American hair transverse cuts using synchrotron infrared microspectrometry, Int J Cosmet Sci 23 369-74 (2001). 30. K Keis, R Ramaprasad, YK Kamath, Studies of light scattering from ethnic hair fibers, J Cosmet Sci 55 49-63 (2004). 31. R McMullen, J Jachowicz, Optical properties of hair–detailed examination of specular reflection patterns in various hair types, J Cosmet Sci 55 29-47 (2004). 32. C Hadjur, F Fiat, M Huart, D Tang, F Leroy, Morphology of the cuticle of African hair, presented at the Second International Symposium on Ethnic Hair and Skin: New Directions in Research, Chicago (2003). 33. T Takahashi, R Hayashi, M Okamoto, S Inoue, Morphology and properties of Asian and Caucasian hair, J Cosmet Sci 57 327-38 (2006). 34. NP Khumalo, Yes, let’s abandon race, it does not accurately correlate with hair form, J Am Acad Dermatol 56 (4) 709-710 (2007). 35. RDL Mettrie et al, Shape variability and classification of human hair: A worldwide approach, Human Biology 79(3) 265-281 (2007). 36. G Loussouarn et al, Worldwide diversity of hair curliness: A new method of assessment, Int J Dermatol, 46(1) 2-6 (2007). 37. L’Oréal Research, Internal studies on attitudes and usage. 38. SB Ruetsch, YK Kamath, Fluorescence and scanning electron microscopic characterization of cuticle erosion in human hair, IFSCC Magazine 9 29-35 (2006). 39. J. Epps, Letter to the Editor, J Soc Cosmet Chem 99 213-214 (1983). 40. CR Robbins, C Reich, Prediction of hair assembly characteristics from single-fiber properties. Part II. The relationship of fiber curature, friction, stiffness, and diameter to combing behavior, J Soc Cosmet Chem 37 141-158 (1986). 41. CR Robbins, C Reich, J Clarke, Hair manageability, J Soc Cosmet Chem 37 489-499 (1986). 42. CE Porter et al, The behavior of hair from different countries, J Soc Cosmet Chem 60 97-109 (2009). 43. TA Evans, Fatigue testing of hair-A statistical approach to hair breakage, J Soc Cosmet Chem 60 599-616 (2009).