Combination of Keyword and Visual Feature based Image Retrieval System

Keyword-based image retrieval systems havebecome popular for many image databaseapplications. To improve the performance ofkeyword-based web image queries, combination ofkeyword and visual feature based image retrievalsystem is presented in this paper. Firstly, DOM(Document Object Model) trees are constructed fromcollected web pages. And several text blocks aresegmented based on text cohesion. Then, visualfeatures are extracted from color images in RGB(Red, Green and Blue) color space by using colorhistogram. When user query is entered, text blockswhich contain web images are taken as theassociated texts of corresponding images andTF*IDF values are used to index web images.Finally, keyword and visual features are combinedby using Gaussian Mixture Model to produce therelevance images

A Study on Phytochemical, Elemental Analysis and Antimicrobial Activity of Leaves of Mentha arvensis Linn

Mentha arvensis Linn. leaves have been given to treat indigestion, skin diseases, coughs, rheumatic pains, arthritis and as remedy for inflamed joints. Above the pros, this research definitely was done. It deals with the study of phytochemical constituents, elemental analysis and antimicrobial activity of leaves of Mentha arvensis Linn. (Pudina). It is usually consumed as a vegetable. The phytochemical investigation of pudina indicated the presence of alkaloids, α-amino acid, flavonoids, glycosides, phenolic compounds, reducing sugar, saponins tannins and steroids whereas starch, organic acids and terpenoids were not detected. The qualitative elemental analysis showed that K, Ca, S, P, Fe, Mn, Ti, Zn, Cu, Rb and Br were present in sample by using EDXRF spectrophotometer. Antimicrobial activity was studied by agar well diffusion method against Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Escherichia coli. Water extract did not show activity on all species of microorganisms. Ethanol extract of pudina leaves showed higher antimicrobial activity against than other extracts by tested organisms