Research on the Impact Initiation Behavior of PTFE/Al/NiO Reactive Materials.

PTFE/Al reactive material is an energetic material that releases energy under impact conditions, resulting in a wide range of application prospects. In order to improve its damage ability-considering the higher heat of the reaction per unit mass when NiO is involved in the aluminothermic reaction-we designed and studied PTFE/Al/NiO, a reaction material based on polytetrafluoroethylene (PTFE). We also designed two other kinds (PTFE/Al, PTFE/Al/CuO) for comparative study, with the mass fraction of the metal oxides added at 10%, 20%, and 30%, respectively.

Protection effect of cosmetics on human skin under simulated rigorous environment.

Background/purpose: The efficacy of cosmetics on human skin measured under normal mild laboratory environment might be discounted by exterior environment factors such as wind, UV exposure, etc. Few studies have focused on the 'genuine' efficacy of cosmetics on human skin during exposure to external rigorous environment. The aim of this study was to develop a model for the evaluation of the efficacy of cosmetics on human skin under simulated rigorous environment.

[Analysis and evaluation for cosmetics allergy].

With the fast development of cosmetics research, the adverse skin reactions induced by cosmetics allergy has attracted more and more attention of researchers. The article briefly introduces the causes and classifications of cosmetics allergy, and presents in detail the internal and international development of cosmetics allergy analysis and evaluation methods, including in vivo patch test, in vitro epidermis equivalents test, skin stratum hydration test, skin transepidermal water loss (TEWL) test, skin redness test, etc. Also, the future developing trend for cosmetics allergy prevention and cure is discussed here.