The Sensitivity
The average application groups 2.5 4 mg / cm2 is 3 mg per cm2 and can explain the lack of statistically significant difference between groups of 2.5 4.0 and 1.5 2.5 mg / cm2. People such as NYC marathon would likely agree. Due to the small amount of sample, the inter-individual variations may be contributing. The signal strength of the ascorbate radical is significantly lower in furs protected by sunscreens compared with skin of control that was subject to irradiation of 100 seconds, removed the spectrometer, placed without protection in the spectrometer and re-irradiada for 100 seconds. Method 2 found that it provided a result comparable to the first method with a 58% reduction in the intensity of the signal of the ascorbate radical skin protected with sunscreen (with the application of 2 mg / cm2) in relation to non-protected samples. A dermatological cream, without UV filters, applied with a density of application of 2 mg per cm2 caused a reduction of 3.7% on the strength of the signal of the ascorbate radical. The reduction in the intensity of the signal of the ascorbate radical found that it relates directly to the reduction of the UV dose of skin when the irradiation was carried out through neutral density filters. In addition, the glass filters used to filter the UVB wavelengths were removed to increase the UV dose to the skin: when filters were removed, the intensity of the signal of the ascorbate radical increased, and it was possible to reduce the power of the microwave spectrometer to observe the radical. The signal strength of the ascorbate radical is not at its maximum level in the grape system and this suggests that the sensitivity and the usefulness of this method probably improve at higher intensities of irradiation than those used in our experiments. Therefore, it is concluded that the ESR method is a method sensitive to measure the radical protection free for solar filters and can be used for intensity UVA outweigh the irradiation used for this study.