Keratinization - newly formed cells mature and fill up with fibrous protein called keratin, COHNS elements - the major element that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur, carbon., hydrogen bond - a week physical sided bond that is broken by heat or water, salt bond - a weak physical side bond broken by pH change, disulfide bond - a strong chemical side bond that joins the sulfur atoms of two neighboring cysteine amino acids ,

chemical composition of hair

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