一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

ChemicalBook >> journal list >> International Journal of Cosmetic Science >>article
International Journal of Cosmetic Science

International Journal of Cosmetic Science

IF: 2.7
Download PDF

Penetration of different molecular weight hydrolysed keratins into hair fibres and their effects on the physical properties of textured hair

Published:18 September 2020 DOI: 10.1111/ics.12663 PMID: 32946595
E. Malinauskyte, R. Shrestha, P. A. Cornwell, S. Gourion-Arsiquaud, M. Hindley

Abstract

Objective

To investigate the effects of different molecular weight (MW), wool derived hydrolysed keratins (i.e. peptides) on the physical properties of relaxed textured hair.

Methods

Very curly hair of African origin was relaxed using sodium hydroxide-based treatment. Relaxed hair was treated with different MW peptides derived from keratin protein and an amino acid, L-Leucine. The low-MW keratin peptides were 221?Da, the mid-MW keratin peptides were approximately 2577?Da, and the high-MW keratin peptides were approximately 75?440?Da. The penetration of these different peptides into relaxed hair was evaluated using a laser scanning micrometre and by fluorescence microscopy. The effect of these compounds on single-fibre mechanical properties and thermal properties was evaluated using tensile and DSC testing, respectively.

Results

Low- and mid-MW compounds were able to penetrate deep into the hair cortex. High-MW peptide adsorbed onto the hair surface and possibly slightly penetrated into the outer layers of the fibre surface. Both mid- and high-MW keratin peptides, increased Young’s modulus and reduced hair breakage at 20% and 80% relative humidity. With the exception of mid-MW peptide, other peptides and amino acid were not able to modify thermal properties of relaxed textured hair.

Conclusions

Our data suggest that low-MW compounds may increase hair volume, and high-MW peptides may repair damage on freshly relaxed textured hair.

Substances (2)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Sodium hydroxide 1310-73-2 NaOH 1358 suppliers $14.00-$17490.00
L-Leucine 61-90-5 C6H13NO2 1150 suppliers $4.00-$2980.00

Similar articles

IF:11

Minoxidil: mechanisms of action on hair growth

British Journal of Dermatology A.G. Messenger, J. Rundegren,etc Published: 19 February 2004
IF:4.7

Minoxidil and its use in hair disorders: a review.

Drug Design, Development and Therapy Poonkiat Suchonwanit,?Sasima Thammarucha,etc Published: 9 August 2019
新安县| 绵竹市| 南乐县| 乌拉特前旗| 静乐县| 花莲县| 宝坻区| 什邡市| 西畴县| 普兰县| 东乡族自治县| 大化| 上犹县| 南昌市| 丰都县| 民勤县| 措美县| 邓州市| 青冈县| 外汇| 涞源县| 天水市| 塔城市| 佛山市| 泰顺县| 康平县| 喀什市| 固始县| 鸡泽县| 青神县| 遂溪县| 衡水市| 新乡市| 澄迈县| 石嘴山市| 太白县| 磐安县| 开平市| 开阳县| 保亭| 柏乡县|