• SAIC

Recent Advances In Flat Film Single Crystal Camera Design for structure studies of large unit cell biological and protein crystals

  • By R G Agarwal
The study of crystal structure has become vital to molecular biologists and to scientists working in the field of protein chemistry. The scientists working in this field found wide use of single crystal four-circle computer-controlled diffractometer for measuring reflections from a single crystal all over the Ewald sphere for complete evaluation of crystal structure. The speed and accuracy of the four-circle diffractometer was preferred to photographic methods like Weissenberg and Buerger precession cameras.

Photocatalytic Degradation and Mineralization of Reactive Textile Azo Dye Using Semiconductor Metal Oxide Nano Particles.

  • By Manjusha Kulkarni and Pragati Thakur. Department of Chemistry, RNC Arts, JDB Commerce and NSC Science College, Nashik, India
The textile industry consumes considerable amounts of water during the dying and finishing operations. Dyes extensively used are found to be toxic and considered to be resistant to biodegradation. In this work a detailed investigation of heterogeneous photocatalytic degradation of Navy blue HE2R 1 (NB), azo dye of reactive class is presented using UV/P- 25TiO2/ZnO2/H2O2 process in aqueous suspension under 8W low-pressure mercury vapor lamp irradiation by using Semiconductor metal oxide nano particles. Here we also report the optimization of various experimental parameters such as effect of catalyst concentration, effect of substrate concentration, effect of addition of H2O2. The obtained results show that the employment of UV/P- 25TiO2/ZnO2/H2O2 process and selection of optional operational parameters lead to complete decolorization and substantial mineralization of Navy blue HE2R 1 (NB) dye which is supported by showing decreases in Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) of the dye solution.

Role of Nd3+ Ions in Modifying the Band Structure and Photocatalytic Properties of Substituted Indium Titanates

  • Mrinal R.Pai, Jerina Majeed, Atindra M.Banerjee, Ashok Arya, Shovit Bhattacharya, Rekha Rao and Shyamala R.Bharadwaj; Bhabha Atomic Research Centre, Mumbai, India
We report here the role of Nd3+ ions in modifying the band structure of indium titanate and enhancement of photocatalytic evolution of H2 from H2Omethanol mixtures in both sunlight and visible irradiation over Nd3+In3+ 2Ti4+O5 oxides.