Anti-static properties of some cationic polymers used in hair care products

Anti-static properties of cationic polymers on hair have been measured by using an electrostatic voltmeter. Comparisons are made with conventional cationic surfactants. Behaviour of cationic polymers from a cationic base and an anionic base have been explained. Experiments are performed to arrive at the hypothesis that cationic polymers form a complex with anionic detergent and that this cation-anion complex solubilizes in excess of anionic detergent, but on dilution with water it forms a turbid solution.
Propriétés anti-statiques de certains polymères cationiques utilisés dans les produits de soins pour les cheveux     

商品包装的色彩美学

论述了商品包装的色彩在年龄,性格,职业,情境等方面的运用,强调了“色彩就是财富”的思想。     

Surface characterization of human hair by atomic force microscopy in the imaging and F-d modes

Surface structure and surface mechanical properties of human hair have been characterized by atomic force microscopy in the imaging mode and by force vs. distance, F-d, analysis. The effects of treatment by commercial conditioner/shampoo or by aqueous exposure have been investigated. The cuticular structure has been imaged at medium resolution; longitudinal striations with lateral spacings of 150-350 nm and vertical corrugations in the range 2-8 nm were observed at higher resolution. The features are similar to those observed for untreated wool fibre. Both adventitious debris/contamination and residues from cosmetic treatment can be imaged with resolution in the low-nanometre range. Removal of the cuticular surface layer from treatment with alkali solution, and subsequent imaging, revealed a fibrous substructure. F-d analysis of the surface is a rich source of spatially resolved mechanical and chemical information. Surface stiffness, and an equivalent Young's Modulus, E, can be inferred from the shape of the 'approach' tip-to-surface contact curve. A value of E of approximately 10 MPa was obtained for untreated hair. During aqueous exposure for 1 h the stiffness and modulus decreased by approximately a factor of 10. The discontinuity seen at 'lift-off' during the retract half-cycle of F-d analysis represents a measure of tip-to-surface adhesion. Adhesion decreased during aqueous exposure and was below the level of detectability after 1 h. Likewise, treatment by conditioner had the effect of lowering adhesion. High resolution F-d data revealed features that are consistent with the presence of a thin and readily compressible surface layer, probably analogous to the surface lipid layer on untreated wool fibre.     

Atomic force microscopy of human hair

The atomic force microscope (AFM) was used to investigate the surface architecture of the entire lengths of cleaned human head hairs. Many features previously seen with the scanning electron microscope (SEM) were identified. However, the AFM has provided much greater detail and, in particular, the hair's cuticular surfaces appear not to be as smooth as had been previously supposed. A consistent feature was of step discontinuities or "ghosts" on the scale surfaces. These delineated the original location of each overlying scale before its edge had been chipped away. There was a change in the longitudinal angular presentation of the surfaces about each ghost. This means the distal ends of each cuticle cell have been synthesised in the follicle to be thicker than where that same cuticle cell is bounded on both sides by other cuticle cells. The undamaged outer cuticular surfaces at the root end of each hair were covered everywhere by longitudinal ridges (striations). Where the hair surface was worn, the striations terminated at a scale edge ghost. The ridges were approximately 9 nm high and were in parallel array with a lateral repeat spacing of about 350 nm. The striations are evidently formed on the outer surface of each cuticle cell following earlier contact in the hair follicle with the inner root sheath. The study of stained transverse sections of hairs in the transmission electron microscope (TEM) is suggested as a means for throwing some light on the underlying structure and chemistry of the striations. Finally, our AFM studies have revealed that the surface of the freshly emergent hair gradually changes over a distance of about 20 mm and that the surface of the hair for most of its length is quite different from that near the root. This is likely to be of import to those engaged in the hair toiletries industry.     

LightSheer半导体激光脱毛的疗效评价

目的:评价LightSheer半导体激光脱毛的治疗效果。方法:运用LightSheer半导体激光脱毛系统,对97名患者共113个部位进行脱毛治疗,波长800nm,能量密度24-40J/cm2,脉冲宽度30ms,分别对治疗一次、二次及三次后的有效性进行分级评价。结果:97名患者共113个部位一次治疗后均出现毛发再生减少、再生延迟,再生毛发细小、浅淡。随着治疗次数的增加有效性分级提高。二次治疗后,60%以上可达到3级(毛发减少40-59%);三次治疗后,80%以上可达到3级。腋窝和唇毛部位约50%可达到4级(毛发减少60-79%)。结论:LightSheer半导体激光脱毛系统对亚洲人是安全和有效的,80%的患者经三次治疗后毛发可减少近60%,但要达到更好的疗效需更多次治疗。     

棉/绒织物开发与研究

本文论述了牦牛绒与棉纤维的性能特点，介绍了棉绒混纺纱、棉绒混纺交织织物的工艺技术要点及织物性能     

毛发染料的化学

有41篇文献的毛发染料化学的综述。     

深浅聚散万取一收-陶艺的模糊性散论

在茫茫的宇宙中,模糊现象无处不在,形状千差万别,性质多种多样,既有确定的明晰的一面,又有不确定的模糊的一面。客观事物既有被认知的,也有未被认知的,客观世界中也存在着确定与不确定,明晰与模糊的运动变化,势必影响到文学艺术作品的发展变化,也必然或多或少地反应在我们的作品中;也会时隐时现的反映在我们的作品之中,成为作品中充满生机的一部分。陶瓷艺术是客观世界的再现与表现,是陶艺家主观情感的升华。陶艺作为一门艺术形式,也必然存在着明晰与模糊的双重性,陶艺的模糊性也必然反映在作品中,体现在构思到表现手法与工艺制作的方方面面。