Bathochromic and hypsochromic shifts in the photo-luminescent spectra of doped and functionalized carbon nano-dots (CDs) arise due to the complex interaction between CDs and the solvent molecules around them. Nitrogen-functionalized carbon nano-dots (N-CDs) were synthesized from citric acid and urea using microwave assisted hydrothermal methods. Optical studies (absorption and photoluminescence...

this study aims to inspect the performance of the wastewater treatment system of the pars oil refinery. quantity and quality of wastewater are determined through samplings and measurements. the performance of system is evaluated considering total suspended solids, total dissolved solids, phosphate, chemical oxygen demand, biochemical oxygen demand, ammonia nitrogen, furfural, oil and ph. for pr...

Lipids were extracted from Isochrysis galbana using a microwave-assisted method accompanied by various types of organic solvents. The effects of organic solvent type and microwave input energy on the fatty acid characteristics of the extracted lipids and their biodiesel product were investigated. Variations in the characteristics of the lipids extracted using a combination of n-hexane and iso-p...

Initial burst is one of the major challenges in protein-encapsulated microparticle systems. Since protein release during the initial stage depends mostly on the diffusional escape of the protein, major approaches to prevent the initial burst have focused on efficient encapsulation of the protein within the microparticles. For this reason, control of encapsulation efficiency and the extent of in...

Third phase formation in the extraction of Pu(IV) nitrate by 30% tri-n-butyl phosphate (TBP) dissolved in n-dodecane or in the highly branched diluent hydrogenated polypropylene tetramer (HPT), which may also be known as 4,4 dipropyl Received 22 June 2005, Accepted 31 October 2005 The views expressed are solely those of the authors and no official support or endorsement of this publication by t...

The use of veterinary drugs may cause the presence of residues in food of animal origin if appropriate withdrawal periods are not respected. A high-performance liquid chromatography (HPLC) method has been developed for the simultaneous detection of 11 benzimidazole residues, including metabolites – albendazole, albendazole sulphoxide, albendazole sulphone, fenbendazole, fenbendazole sulphoxide ...

Four new complexes were prepared by the metathetic reaction of trace heavy metals like Cd, Zn, Cu and Hg with two different dithioligands of the formula ML 2 [ M= Cd, Zn, Cu and Hg and L= potassium-1,1-dicyano-2,2-ethylenedithiolate and potassium N-4-fluorobenzyl, N butyldithiocarbamate ] and characterized by elemental analysis, IR, UV-visible, 1H,13C NMR and AAS. Atomic Absorption Spectrophoto...

The extraction of rare earth elements (REEs) from nitric acid solution with a triphosphine trioxide (TPO) is presented. Performances of such a ligand in ionic liquids vs. a classical solvent (benzyl ether) are compared. TPO seems to be 10 to 100 times more efficient when it is dissolved in ionic media whatever the concentration of nitric acid involved. Mechanistic investigations reveal that cat...

The possibility of obtaining porous films through solutions polylaurolactam (PA12) in benzyl alcohol (BA) was considered. theoretical calculation the phase diagram showed presence upper critical solution temperature (UCST) for PA12/BA system at 157 °C. PA12 completely dissolved BA higher temperatures, but resulting underwent separation upon cooling down to 120–140 °C because PA12’s crystallizat...