In order to deal with the arising environmental issues across the globe at present nano particles with unique properties laid a benchmark in the name of nano catalysis. In this work the significance of calcination temperature on the thermal, electronic, structural and surface properties of a nano catalyst produced by sol–gel method using ultrasonic radiation against the disposal of toxic textile pollutants is studied in detail. The extract of tea leaves has been used as a bio-template during the synthesis to revise the crystallite size, surface area, optical absorption potential, and rate of agglomeration of nano sized grains by regulating their physico-chemical and surface properties. The influence of calcination in the transformation of single phased anatase titania to mixed phase anatase–rutile titania and the corresponding outcome in its photocatalytic activity employed in water treatment applications have been verified. The nano catalyst obtained is characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transition electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Thermo gravimetric analysis (TGA), Brunaueur Emmett Teller (BET) analysis, UV–Vis diffused reflectance spectroscopy (DRS-UV–Vis) etc. The mesoporosity of the particle was examined using Barrett Joyner Halenda (BJH) model. The enhanced photo catalytic efficiency (about 97.7%) of templated nano titania due to calcination is verified against Congo red, a textile dye under optimized conditions. The nano catalyst produced can be easily separated, recycled to support its economic feasibility.

Onychophagia or nail biting is the performance of repetitive actions of biting one’s nails often to the level of mutilation of the nail beds. It is a compulsive act most often seen in adolescents but may continue into adulthood, leading to deleterious consequences. Often spurred by anxiety and stress, this oral habit is not so readily addressed by patients and in turn not very much treated by dentists or physicians. This case report describes successful treatment of an adolescent patient with a nail biting habit, with an innovative intraoral fixed habit-breaker appliance.

Trauma to the anterior teeth is common in children, who become susceptible to such injury from the very moment they attempt to walk erect independently. Dental avulsion refers to the complete displacement of the tooth from its socket due to trauma. Various treatment modalities are available to treat such case. The tooth can be replanted back or replaced by a prosthesis depending on the extraoral drytime and the stage of development of root of the avulsed tooth. Objective: To describes a case of avulsed permanent maxillary central incisor managed by fixed functional prosthesis. Case report: A 12-year-old boy came with an avulsed permanent maxillary central incisor. The tooth was replaced esthetically and satisfactorily after 1 month of avulsion by means of a biologically fixed functional prosthesis, that is, a modified "Hollywood Bridge." In this modality, the crown of the avulsed tooth was used as a pontic, and stainless steel wires and bands were used to fix the prosthesis in the mouth as an interim treatment option.

Environmental sustainability apart from spoken at different levels needs to investigate the management of industrial activities in terms of eco-friendliness. It is well known that effluents from various industries become a major source of environmental degradation in particular water pollution. Thus water analysis report turns to be more significant, to determine the quality and standard of life maintained in a typical ecosystem. This study includes the analysis of physico-chemical factors of raw as well as treated water samples from Korattur Lake employing nano sized adsorbents like titania with tuned structural and morphological properties through organic plant extract. The XRD analysis, BET analysis, DRS-UV analysis, SEM and TEM analysis have been carried out and reported. The marked influence of leaf extract as a template is reflected in reduced crystallite size (12.4 nm) with maximum surface area 105 m 2 /g along with bathochromic shift of absorption edge. The usual indicators of contamination level at a given source namely Biological Oxygen Demand (BOD-85%), Chemical Oxygen Demand (COD-94.5%), Dissolved Oxygen (88%), Total Suspended Solids (TSS-75.6%), Electrical Conductivity (74.5%), Chloride (89%), Nitrate and Phosphate contents etc. were used to ascertain the efficiency of contaminants removal using tea leaf extract mediated nano titania. The reliability factor of the treatment process was found to be less than 1, revealed the effectiveness and reliability of nano material.

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