SEPARATIONS W. De Malsche*, J. Op De Beeck, Selm De Bruyne, H. Gardeniers and Gert Desmet Vrije Universiteit Brussel, BELGIUM and Mesa+ Institute for Nanotechnology, THE NETHERLANDS ABSTRACT A non-porous C8 coated silicon pillar channel design is presented that allows the achievement of a high pressure and high efficiency operation for HPLC separations. Performing on-chip injection and detectio...

This study was carried out to determine the major phospholipids in selected dairy products (Beta Serum, Procream and Phospholipids-Rich Dairy products), evaluate accuracy of developed fat extraction method for liquid samples compare different obtained using HPLC-UVvis 31P-NMR methods. It found that can be used estimate lipid content were still a bit satisfactory. Using method, it sphingomyelin ...

the complexive abilities of 5,11,17-tddert-butyl-23 amino-25.26,27,28-tet3propoxy-calix[4]arere and5,1127-tri-amino-23 acelyktert-butylamide-25,26,27,28-tetrabutoxy-calixplarene towards alkali metalions lit nat, kt ric and cs+ in methanol-chloroform mixture have been evaluated at 25 °c, using uvvis spectrophotometric techniques. the results showed that the hgands are capable to complex with all...

The complexive abilities of 5,11,17-tddert-butyl-23 amino-25.26,27,28-tet3propoxy-calix[4]arere and5,1127-tri-amino-23 acelyktert-butylamide-25,26,27,28-tetrabutoxy-calixplarene towards alkali metalions Lit Nat, Kt RIC and Cs+ in methanol-chloroform mixture have been evaluated at 25 °C, using UVVis spectrophotometric techniques. The results showed that the hgands are capable to complex with all...

Background: Nanoparticles (NPs) are colloidal systems with particles ranging from 10 to 100 nm in diameter. Because of their large surface-volume ratio, NPs are biologically active materials that could interact with biomolecules and microorganisms, enter into the cells, and affect the metabolic functions. The study aimed to biosynthesize silver nanoparticles (Ag-NPs) from Capparis spinosa fruit...

This paper presents the review on different concepts of fluoride detection techniques and technologies in water. At high concentration Fluoride is toxic to humans. When humans are exposed to fluoride-containing water, they can suffer from health problems, such as dental disease. Drinking water is the most consumed beverages. For humans beverages aresignificant sources of fluorides. Consistent e...

A oxidação do paracetamol (1) promovida pelo sistema TiO 2 /UV em meio aquoso foi investigada. O contínuo monitoramento feito por várias técnicas, tais como espectroscopia UVVis, HPLC (cromatografia líquida de alta eficiência), TOC (carbono orgânico total) e ESI-MS (espectrometria de massas com ionização electrospray), mostrou que a remoção do paracetamol foi altamente eficiente, mas com um gra...

Se desarrollaron sólidos nanoestructurados impregnados con diferentes contenidos de hierro (1; 2,5; 5 y 10% p/p) como catalizadores eficaces para degradar soluciones acuosas glifosato en condiciones reacción extremadamente suaves: presión atmosférica temperatura ambiente. Estos materiales se caracterizaron por XRD, fisisorción N2, UVvis-DR XPS. obtuvieron estructuras mesoporosas regulares típic...