3,4-ِdihydropyrano[c]chromene derivatives were synthesized using sulfonic acid functionalized silica (sio2-pr-so3h) as a highly efficient heterogenous solid acid catalyst via one-pot three-component condensation of aromatic aldehydes with malononitrile and 4-hydroxycoumarin in excellent yields.

The relevance of security as one of the major contributors to an effective operational infrastructure has been growing in importance over the past 3-5 years, and today it resides as one of the two top investment priorities for senior management (the other one being critical server virtualization). Effective management by organizations when dealing with targeted and multiple parallel attacks com...

the obsessive beliefs questionnaire-44 (obq-44), a self-report measure, was developed by the obsessive compulsive cognitions working group (occwg) to assess beliefs considered relevant in the etiology and maintenance of obsessions and compulsions. the purpose of this study was to evaluate the psychometric properties of the persian language version of the obsessive beliefs questionnaire (pobq-44...

this paper is mainly focusing on the determination of mean molal activity coefficient of hcl in aqueous acidic medium. the present investigations have been carried out to determine the activity coefficients of hydrochloric acid in 2-propanol water mixture solutions under various conditions to study the ion solvent interactions in different temperatures. the standard molar potential em0 of the c...

cell replacement therapy has provided the basis for future clinical applications to treat central nervous system injury, a common result of car accidents. induced functional motoneurons are an option for replacing the lost motoneurons. adipose derived stem cells (adscs) are an appropriate source of cells for autologous cell therapy with the ability of neural differentiation. in this study, adsc...

objective : the aim of study was to develop a rapid assay, dye labelled monoclonal antibody assay (dlmaa), using non-radioactive organic synthetic dyes for identification of toxic shock syndrome toxin-1 (tsst-1) producing strains of staphylococcus aureus. materials and methods: the assay protocol required only two simple steps; addition of tsst-1 antigen to a nitrocellulose membrane and then ad...

introduction: one class of magnetic nanoparticles is magnetic iron oxide nanoparticles (mions) which has been widely offered because of their many advantages. because of extensive application of mions in biomedicine, before they can be used in vivo, their cytotoxicity must be investigated. therefore, there is an urgent need for understanding the potential risks associated with mions. materials ...

conclusions according to achieved results, it was defined that swcnts is a quite effective adsorbent in removal of 2, 4-d from aqueous environments. results maximum adsorption capacity of the swcnts was 979.6 mg/g at ph5, contact time 45 min, initial concentration of 5000 µg/l, and 23 ± 2 ◦c temperatures, when 97.96% of 2, 4-d herbicide were removed. the adsorption equilibriums were analyzed by...

bl ood glucos e l evels meas ured a t half hour intervals in a series of 45 major s urgica l procedur es demonstrated a consis tent hyp er glycemi a during the course of operation . peaks were ass ociated with per iods of cardi a-vascular stress .. i n cont r ast , pat ients in whom autonomi c act ivi ty was inhibited by ganglionic blockade demonstra t ed a cons ist ent decrease in blood g luco...