this work presents a hybrid method for motif discovery in dna sequences. the proposed method called spso-lk, borrows the concept of chebyshev polynomials and uses the stochastic local search to improve the performance of the basic pso algorithm as a motif finder. the chebyshev polynomial concept encourages us to use a linear combination of previously discovered velocities beyond that proposed b...

in a structural analysis, the “rebellion & decline” theme creates a narrative structure in which eleven stories of shāhnāmeh – equal to 3.18 per cent of the whole epic – are included, which makes it the tenth largest sequence of the shāhnāmeh. this narrative structure (sequence) consists of initial tranquillity, the king’s rebellion, his decline, and ultimate tranquillity. the epical theme of r...

quorum sensing controls the luminescence of vibrio fischeri through the transcriptional activator luxr and the specific autoinducer signal produced by luxi. amino acid sequences of these two genes were analyzed using bioinformatics tools. luxi consists of 193 amino acids and appears to contain five α-helices and six ß-sheets when analyzed by sspro8. luxi belongs to the autoinducer synthetase fa...

Abstract — Fe2O3 substituted 45S5 bioactive glasses were prepared. Glass derived Bioactive Glass ceramics were obtained through controlled crystallization of bioactive glasses. Nucleation and crystallization regimes were determined by the parameters obtained from differential thermal analysis (DTA) of bioactive glasses. The formed crystalline phases in bioactive glass ceramics were identified u...

the purpose of this research was to study the antimicrobial activities of the endophytic fungi from sesbania grandiflora (l.) pers. the endophytic fungi were isolated from branches and leaves of sesbania grandiflora (l.) pers., and sixty nine isolates were obtained. all isolates were screened for antibacterial and antifungal activities. the indicator organisms were 4 bacteria including staphylo...

in this work, the template, monomer and cross-linker with the ratio of 1:8:40 were used to synthesize molecularly imprinted polymers (mips) for extraction of the bioactive chemical compounds from some traditional herbs as a sorbent material. quercetin, methacrylic acid (maa), trimethylolpropanetrimethacrylate (trim) and tetrahydrofuran (thf) were used as a template, functional monomer, cross-li...

cancer incidence is projected to increase in the future and an effectual preventive strategy is required to face this challenge. alteration of dietary habits is potentially an effective approach for reducing cancer risk. assessment of biological effects of a specific food or bioactive component that is linked to cancer and prediction of individual susceptibility as a function of nutrient-nutrie...

in every field, typology leads to a better, more complete and more precise knowledge. in spite of the importance and extent of traditional persian stories, there is as yet no complete classification of these stories. most of the present classifications are imprecise, mixing the different kinds of stories. this paper merely deals with an analysis, criticism, morphology and typology of persian tr...

background and objectives: entomopathogenic nematodes, belonging to the family heterorhabditis and steinernematidae, are reported to be symbiotically associated with specific bacteria and the secondary metabolites produced by these bacteria possess antimicrobial activity. in this study, bacteria were isolated from nematodes belonging to the family rhabditidae, and the antimicrobial activity was...