Transmittance

Categorization is an action that many human beings unconsciously perform when observing differences amongst individuals in society. These differences are categorized and people are often placed into labeled groups. In fact, society holistically makes meaning of events, symbols, and experiences, which helps establish socially, stratified realities. The placement of humans into this system depends on characteristics such as race, class, and gender. Depending on a person’s cultural background,…

proven to be more effective at reflecting and scattering UV radiation [4]. In order to determine that the SPF increases when nanosized particles of ZnO and TiO2 are used, spectral scans of ZnO and TiO2 were performed using a UV-2000S Ultraviolet Transmittance Analyzer [6]. A transpore tape substrate was used as a blank, and then the sunscreen was applied before obtaining another spectra. This method allows quantification of the changes in SPF from micro particle to nanoparticle formulas. The…

water using volumetric flasks, and this was used as reference for all analyses. In the second trial, using RO water, and this was used as reference for all analyses. However, all these analyses that used different water showed the same results. %Transmittance and % Reflectance were also collected but not…

As it was demonstrated in Figure 2, the peaks at 1703 and 1727 cm-1 in the MPS-comprising nanohybrids appeared, while the peak at 1745 cm-1 vanished. Through the formation of MPS-comprising nanohybrids, the observation of the new absorption bands (1707 and 1727 cm-1 ) concomitant of the absorption at 1733 cm-1 may be owing to the formation of ester groups through the reaction between carboxylic acid groups of PAA oligomers and silanol groups of silica moieties 12. Besides, in SiO2/PAA hybrids,…

I. Introduction Catalysts are stimulus that speed up the rate of a reaction by lowering the activation energy of the reaction. Chemists discovered catalysts when they were trying to determine how to turn one substance into another. Although early chemists did not resolve how to turn substances into one another, they did discover that various materials could be changed from one form to another. This also led to the discovery that if certain chemicals were present in the reaction, the change would…

CORROSION STUDIES WITH ANTIGONON LEPTOPUS IN 1M HCl S.Aejitha 1, P P.K.Kasthuri 2andGeethamani 3 1 Department of Chemistry, Asian College of Engineering & Technology, Coimbatore- 641110, India 2 Department of Chemistry, L.R.G.Government Arts College for Women, Tirupur- 638604, India 3 Department of Chemistry, Sriguru Engineering College of Technology, Tamil Nadu, Coimbatore -641110, India Correspondence should be addressed to S.Aejitha ,aejitha_subbaian@yahoo.co.in ABSTRACT The inhibition…