Showing 2 results for Alibakhshi
Saman Ahmad Nasrollahi, Hesam Alibakhshi, Alireza Firooz,
Volume 4, Issue 4 (12-2013)
Abstract
Background and Aim: Shampoos are surfactant systems to clean hair and body. Two kinds of surfactants are generally used in shampoo formulations: anionic and amphoteric. These agents, especially anionic ones may cause skin irritation and dryness after bathing. So, using a simple and fast method to determine the types and concentrations of surfactants can help to choose a product with high efficacy and low side effects. This study was aimed to determine surfactant concentrations using potentiometric titration method.
Methods: Ten hair and body shampoos were selected from Iran's market to determine concentration of anionic and amphoteric surfactants using potentiometric titration method with prepared standard solution.
Results: All formulations contain both surfactants, but one formulation did not have the amphoteric one.
Conclusion: When we want to choose a shampoo for irritated and dry skin, formulations with more amphoteric surfactant should be chosen because they are much milder on the skin in comparison with anionic surfactants. Potentiometric method which was described in this study is one of the easiest ways to find out which shampoo is suitable for each patient.
Saman Ahmad Nasrollahi, Hesam Alibakhshi,
Volume 4, Issue 4 (12-2013)
Abstract
The use of sunscreens should also be recommended in order to work against all kind of ultarviolet (UV)-induced skin damage such as photoallergies, skin wrinkles, sunburn or even skin cancer. Sunscreens contain chemical filters (organic absorb regularly UVB radiation) and physical filters (e.g., TiO2 and ZnO). The second group has been said to reflect and scatter UVB and UVA radiation. TiO2 is also extensively used in sunscreen formulations as active broadband sunscreens that blocks both UVB (290–320 nm) and UVA (320–400 nm). Although titanium dioxide is listed as a safe pigment, with no known adverse effects when it is used in cosmetics, but we should concern about ultrafine or nanoparticle form of titanium dioxide. If titanium dioxide particles used to act as a sunscreen are small enough, they can penetrate the cells, leading to photocatalysis within the cell, and cause DNA damage after exposure to sunlight.
