A Lightweight Privacy Preserved Buyer Seller Watermarking Protocol Based on Priced Oblivious Transfer

replacing traditional selling of digital products (such as songs, videos,movies, software, books, documents, images, etc.) through shops. This mode of sale can bring the product price down as infrastructure cost in setting up shops and retail chain is reduced. On downside, however, this may increase problem of piracy as digital data can be easily copied, manipulated and transmitted. To protect copyright of owner, establish right of buyer on purchased copy and yet check data piracy, it is required that a rusted e-distribution system be built. Such a system should be able to ensure secure transaction between buyer and seller, check ownership and track the origin of unauthorized copies..The buyer seller watermarking protocols are heavyweight protocols.These protocols require large computation power and network bandwidth.The heavyweight protocols could not be used for the resource constrained devices since the devices does not support battery power.A lightweight protocol has been proposed which is best suited for the resource constrained devices. The protocol is based on a fast asymmetric encryption with novel simplification.In this approach the seller authenticates the buyer but does not learn which items are purchased. The protocol is designed in such a way that the buyers pay the right price without disclosing the purchased item, and the sellers are able to identify buyers that released pirated copies. The protocol is constructed based on the priced oblivious transfer and the existing techniques for asymmetric watermark embedding. Index Terms- Buyer–seller watermarking protocol, fair exchange, priced oblivious transfer (POT). B I

A Study on Phenotypic Polymorphism of Serum Paraoxonase1 and Activity of Serum Cholinesterase in Acute Organophosphorous Compound Poisoning

OBJECTIVE: Serum Paraoxonase1 (PON1) is involved in the metabolism of Organophosphorous (OP) compounds. PON1 is polymorphic and at least three phenotypes have been described so far. The phenotypic polymorphism of PON1 may affect the susceptibility of patients to OPC toxicity. This study is focused on the evaluation of phenotypic enzyme activities of serum Paraoxonase1 (PON1) and its relationship with serum Cholinesterase activity in 54 patients with Acute Organophosphorus compound (OPC) poisoning. MATERIALS AND METHODS: Serum paraoxonase and arylesterase activities of PON1 were estimated in dual beam spectrophotometer. Serum Cholinesterase activity was measured in Semiautoanalyser. The results were analyzed using SPSS version 16, where ‘one way ANOVA’ was used to compare mean values of variables among PON1 phenotypes and correlation analysis was done with ‘Pearson coefficient of correlation’. RESULTS: Mean values of activity of Cholinesterase, Paraoxonase, Arylesterase were 2325 (SD ± 2027.19) U/L; 218.39 (SD ± 124.30) U/L; and 85.13 (SD ± 30.19) kU/L respectively. Activity of all three enzymes viz., Cholinesterase, Paraoxonase, Arylesterase varied with respect to PON1 phenotypes. PON1 BB phenotype has high Paraoxonase and Cholinesterase activity whereas AA phenotype has low Paraoxonase and Cholinesterase activity and the AB phenotype was reported with in between activity. Serum Cholinesterase was correlated positively and significantly with serum Paraoxonase (Coefficient of Correlation, r = +0.767, with p value < 0.0001) as well as with serum Paraoxonase/Arylesterase activity (P/A) (Coefficient of Correlation, r = +0.955, with p value < 0.0001) which was used to determine PON1 phenotypes. CONCLUSION: To conclude, in case of Acute OPC poisoning, identification of PON1 phenotype can be useful to identify the susceptibility of patients to OPC toxicity

Preparation and Characterization of Silica Material from Rice Husk Ash – An Economically Viable Method

Rice husk is a form of agricultural biomass that provides an abundant silicon source. Rice husks are widely burnt in agricultural fields in India because it is difficult to find other uses for them. Farmers burn rice hulls usually under incomplete combustion conditions to avoid accidental fires. The objective of this study was to develop a new method of amorphous silica was prepared from rice husk ash by sol - gel method. Initially received from Rice husk ash was calcined at 4000C, 5000C, 6000C and 7000C for 5 hrs to remove the volatiles in the sample and determine the amorphous structure of SiO2. Next, the thermally treated RHA was mixed with alkali solution to produce sodium silicate solution and precipitated silica was produced by the neutralization of sodium silicate solution. Rice Husks soaked in nitric acid produced the maximum amount of the sodium silicate solution and precipitated silica. Sodium oxide (Na2O) content and silica (SiO2) content in the sodium silicate solution were also determined. Extracted precipitated silica particles were characterized by Fourier transform infrared (FTIR), X-Ray diffraction and Optical microscopy techniques. The chemical composition of silica was confirmed by FTIR and SEM with EDX.. Highly pure amorphous silica was derived from rice husk ash was confirmed by XRD pattern. The morphology of the obtained materials was analyzed by SEM. At optimized conditions, a nano sized highly pure silica was produced with a high reactivity and 99.9% amorphous in form. This economic technology as applied to waste material also provides many benefits to the local agro industry. Thus this paper may be providing a low cost and simple method to prepare functional materials. Keywords: Rice husk ash, Silica gel, Minerals, Amorphous material, Agricultural bio-wast

Chemical profiling of fern Cheilosoria mysurensis (Wall. ex Hook.) Ching & Shing and its biological activity

Cheilosoria mysurensis (Wall. ex Hook.) Ching &amp; Shing, a medicinal fern traditionally used to treat burns, throat pain and bone fracture. There is no any scientific report regarding anticancer studies of this species. The aim of the study was to find out the chemical components through GC/MS analysis with their antioxidant and cytotoxic activity. GC-MS analysis shows primary ingredients viz, Cis-9, 10-epoxyoctadecan-1-ol and Oxiraneundecanoic acid, 3-pentyl-, methyl ester, trans were present. High free-radical scavenging activity has been discovered in 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and showed the IC50 value of 52.13±0.33. Furthermore, C. mysurensis also showed good cytotoxic effects against DLA and EAC cell lines with values of 72.9% and 79.5% at 200 µg/ml dose respectively. Overall findings suggested that the identified chemical compounds proved to be rich in antioxidant property. Further, this fern can be a good resource for pharma industry to produce novel anti-cancer drugs

Effect of blend ratio on moisture management characteristics of regenerated bamboo/lotus single jersey knitted fabrics

The moisture management properties of the pique knitted fabrics produced from lotus fibre fabrics have been evaluated by SDL- ATLAS moisture management tester and correlated with regenerated bamboo pique knitted fabrics. It is observed that the lotus fabric shows absorption rate similar to that of regenerated bamboo fabric, whereas bamboo lotus blended fabric shows improved spreading speed and one way transport capability than the other fabrics. The lotus fabric exhibits high dimensional stability and the high resistance to pilling. It shows that lotus fabrics are suitable for clothing applications.