7 results for “UV-visible spectrophotometer”

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Research ArticleOpen accessIn the keywordsEffect of Temperature on the Color of Natural Dyes Extracted Using Pressurized Hot Water Extraction MethodNursyamirah Abd Razak, Siti Marsinah Tumin, Ruziyati TajuddinProblem statement: Traditionally, extraction of natural dyes with boiling method produced only one single tone of colorant/dyes which involved plenty of water in several hours of extraction time. A new modern extraction technique should be introduced especially to textile dyers so that a variety of tone of colorants can be produced in a shorter time with less consumption of water. … …American Journal of Applied Sciences, Vol. 8, Issue 1 · 31 Jan 2011 · 9,858 accessesView PDF Cite

Research ArticleOpen accessIn the abstractNew Golden Red Sodium Calcium Silicate GlassesWang Cheng-Yu, Wun Nuan-Xin, Ge Yi et al.Traditional golden red glasses were based on K2O-PbO-SiO2 composition system. In this paper, we reported new golden red glasses based on Na2O-CaO-SiO2 system without SnO2 and PbO in them. By using a spectrophotometer and chromamter color difference meter, it was found that the new glasses had similar optical properties to the traditional ones. The diameter of the gold particles in … …International Journal of Structural Glass and Advanced Materials Research, Vol. 3, Issue 1 · 13 Feb 2019 · 7,068 accessesView PDF Cite

Research ArticleOpen accessIn the abstractMonomers Release from Dental Composites: Effect of Immersion Media and Photoactivation Light SourceRaquel A.B. da Silva, Talita P. Prates, Driely Barreiros et al.The present study aimed to evaluate qualitatively and quantitatively the products released by composites with different light sources when immersed in distilled water or artificial saliva. Thirty-six samples were obtained from the composites using a silicone matrix. Specimens were divided into 12 groups according to: Composite (Charisma®, FiltekTMSilorane or GC Kalore®), device used for the materials photoactivation (halogen light or … …Current Research in Dentistry, Vol. 5, Issue 1 · 14 Jan 2015 · 7,194 accessesView PDF Cite

Research ArticleOpen accessIn the abstractNanocrystalline Zn0.9Mn0.1S Thin Film: Case StudiesMohammad Syuhaimi Ab-Rahman, Noor Azie Azura Mohd Arif, Abang Anuar Ehsan, Sahbudin ShaariProblem statement: The high quality of ZnS:Mn nanocrystals is important in nanotechnology industries. The perfect chemical procedure is significant to produce the best of nanocrystals. Hence, this research is concern on the good chemical method in processing manganese doped zinc sulphide nanocrystals. Approach: For the first step, Mn doped ZnS nanocrystals were synthesized by using sol gel spin coating method. … …American Journal of Applied Sciences, Vol. 8, Issue 8 · 19 Jul 2011 · 8,124 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDose Response and Optical Properties of Dyed Poly Vinyl Alcohol-Trichloroacetic Acid Polymeric Blends Irradiated with Gamma-RaysSusilawati, Aris DoyanProblem statement: The effects of gamma irradiation on optical properties of cresol-red dyed Poly Vinyl Alcohol (PVA) blended with Trichloroacetic Acid (TCA) for possible use in dosimetry and measurement of radiation dose in gamma rays have been studied using both Raman spectroscopy and UV-Visible spectrophotometer method. Approach: The dosimeters are composed of Poly Vinyl Alcohol (PVA), Trichloroacetic Acid (TCA) at … …American Journal of Applied Sciences, Vol. 6, Issue 12 · 31 Dec 2009 · 8,091 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSynthesis and Optical Properties of ZnO-TeO2 Glass SystemH. A.A. Sidek, S. Rosmawati, Z. A. Talib et al.Problem statement: Systematic series of ZnO-TeO2 glasses with mole fraction of 0.10-0.40 ZnO content with an interval of 0.05 were studied to obtain their physical and optical properties. Approach: All the glass samples were synthesized by rapid melting quenching method under controlled conditions, while their refractive indices (n) were measured by the EL X-02C high precision ellipsometer. The room temperature … …American Journal of Applied Sciences, Vol. 6, Issue 8 · 31 Aug 2009 · 14,090 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDegradation of Textile Dyes Ponceau-S and Sudan IV Using Recently Developed Photocatalyst, Immobilized Resin Dowex-11R. C. Meena, Ram Babu Pachwarya, Vijay Kumar Meena, Shakuntla AryaProblem statement: In present study, we selected a model dyes Ponceau S and Sudan IV, to test a recently developed photo catalyst methylene blue immobilized resin dowex-11. Approach: This is a light-activated process that has been successfully applied to remove organic and inorganic dyes of textile industries. Results: The reactor, made of glass slides (tubes) coated with a thin-film of … …American Journal of Environmental Sciences, Vol. 5, Issue 3 · 30 Jun 2009 · 7,059 accessesView PDF Cite