Browsing by Subject "quantitative analysis"

Article

Alpha spectroscopic analysis of actinides (Th, U and Pu) after separation from aqueous solutions by cation-exchange and liquid extraction

Kiliari, T.; Pashalidis, Ioannis (2010)

The radioactivity concentration of 236Pu, 232U and 228Th in aqueous samples has been determined by means of alpha spectroscopy after chemical separation and pre-concentration of the radionuclides by cation exchange and ...

Article

Americium and samarium determination in aqueous solutions after separation by cation-exchange

Kiliari, T.; Pashalidis, Ioannis (2014)

The concentration of trivalent americium and samarium in aqueous samples has been determined by means of alpha-radiometry and UV-Vis photometry, respectively, after chemical separation and pre-concentration of the elements ...

Article

Analysis of polyphenols using capillary zone electrophoresis - Determination of the most effective wine sample pre-treatment method

Nicolaou, I. N.; Kapnissi‐Christodoulou, Constantina P. (2010)

A simple CZE method has been developed for the simultaneous determination of eight polyphenolic compounds. The influence of several experimental conditions such as buffer (concentration and pH) and temperature were studied. ...

Article

Can we use area per surfactant as a quantitative test model of specific ion effects?

Zemb, Th; Belloni, L.; Dubois, M.; Aroti, Andria; Leontidis, Epameinondas (2004)

The three main currently proposed approaches for understanding specific ion effects are briefly described. In some experimentally well defined and simplified situations, one can decouple ion specificity effects from all ...

Article

Cellular HIV-1 DNA levels in drug sensitive strains are equivalent to those in drug resistant strains in newly-diagnosed patients in Europe

Demetriou, Victoria L.; van de Vijver, D. A. M. C.; Kousiappa, Ioanna; Balotta, Claudia; Clotet, B.; Grossman, Z.; Jørgensen, L. B.; Lepej, S. Z.; Levy, I.; Nielsen, C.; Paraskevis, Dimitrios N.; Poljak, M.; Roman, F.; Ruiz, L.; Schmidt, J. -C; Vandamme, A. -M; van Laethem, K. V.; Vercauteren, J.; Kostrikis, Leontios G. (2010)

Background HIV-1 genotypic drug resistance is an important threat to the success of antiretroviral therapy and transmitted resistance has reached 9% prevalence in Europe. Studies have demonstrated that HIV-1 DNA load in ...

Article

A compendium of volatile organic compounds (VOCs) released by human cell lines

Filipiak, W.; Mochalski, Paweł; Filipiak, A.; Ager, C.; Cumeras, R.; Davis, C. E.; Agapiou, Agapios; Unterkofler, K.; Troppmair, J. (2016)

Volatile organic compounds (VOCs) offer unique insights into ongoing biochemical processes in healthy and diseased humans. Yet, their diagnostic use is hampered by the limited understanding of their biochemical or cellular ...

Article

Crystal/glass phase change in KSb5S8 studied through thermal analysis techniques

Chrissafis, K.; Kyratsi, Theodora; Paraskevopoulos, K. M.; Kanatzidis, M. G. (2004)

The reversible crystal-glass and glass-crystal transitions discovered in KSb5S8 were studied in detail with nonisothermal scanning calorimetry techniques. When cooled, molten KSb5S8 becomes a metastable glass, which can ...

Article

Development of a capillary electrophoresis-mass spectrometry method for the determination of rivastigmine in human plasma - Optimization of the limits of detection and quantitation

Nicolaou, I. N.; Kapnissi‐Christodoulou, Constantina P. (2012)

A capillary zone electrophoresis-electrospray ionization-mass spectrometry (CZE-ESI-MS) method was developed for the analysis of the acetylcholinesterase inhibitor rivastigmine. Several electrophoretic and ESI-MS parameters ...

Article

Epistatic Role of the MYH9/APOL1 Region on Familial Hematuria Genes

Voskarides, Konstantinos; Demosthenous, Panayiota; Papazachariou, Louiza; Arsali, Maria; Athanasiou, Yiannis; Zavros, Michalis; Stylianou, Konstantinos G.; Xydakis, D.; Daphnis, Eugenios K.; Gale, D. P.; Maxwell, P. H.; Elia, Avraam; Pattaro, C.; Pierides, Alkis M.; Constantinou-Deltas, Constantinos D. (2013)

Familial hematuria (FH) is explained by at least four different genes (see below). About 50% of patients develop late proteinuria and chronic kidney disease (CKD). We hypothesized that MYH9/APOL1, two closely linked genes ...

Article

Fetal-specific DNA methylation ratio permits noninvasive prenatal diagnosis of trisomy 21

Papageorgiou, Elisavet A.; Karagrigoriou, Alex; Tsaliki, Evdokia; Velissariou, Voula; Carter, N. P.; Patsalis, Philippos C. (2011)

Article

Imaging morphogenesis, in Xenopus with Quantum Dot nanocrystals

Stylianou, Panayiota; Skourides, Paris A. (2009)

Mesoderm migration is a well studied morphogenetic movement that takes place during Xenopus gastrulation. The study of mesoderm migration and other morphogenetic movements has been primarily based on in vitro assays due ...

Article

Quantitative description and local structures of trivalent metal ions Eu(III) and Cm(III) complexed with polyacrylic acid

Montavon, G.; Bouby, M.; Huclier-Markai, S.; Grambow, B.; Geckeis, H.; Rabung, T.; Pashalidis, Ioannis; Amekraz, B.; Moulin, C. (2008)

The trivalent metal ion (M(III) = Cm, Eu)/polyacrylic acid (PAA) system was studied in the pH range between 3 and 5.5 for a molar PAA-to-metal ratio above 1. The interaction was studied for a wide range of PAA (0.05 mg ...

Article

Quantitative texture analysis of brain white matter lesions derived from T2-weighted MR images in MS patients with clinically isolated syndrome

Loizou, Christos P.; Petroudi, Styliani; Seimenis, Ioannis; Pantzaris, Marios C.; Pattichis, Constantinos S. (2015)

Introduction: This study investigates the application of texture analysis methods on brain T2-white matter lesions detected with magnetic resonance imaging (MRI) for the prognosis of future disability in subjects diagnosed ...

Article

Reactivation of an aged commercial three-way catalyst by oxalic and citric acid washing

Christou, Stavroula Y.; Birgersson, H.; Fierro, José Luis García; Efstathiou, Angelos M. (2006)

The efficiency of dilute oxalic and citric acid solutions on improving the oxygen storage capacity (OSC) and catalytic activity of a severely aged (83 000 km) commercial three-way catalyst (TWC) has been investigated. ...

Article

Regeneration of three-way automobile catalysts using biodegradable metal chelating agent-S, S-ethylenediamine disuccinic acid (S, S-EDDS)

Subramanian, B.; Christou, Stavroula Y.; Efstathiou, Angelos M.; Namboodiri, V.; Dionysiou, Dionysios Demetriou D. (2011)

Regeneration of the activity of three-way catalytic converters (TWCs) was tested for the first time using a biodegradable metal chelating agent (S, S-ethylenediamine disuccinic acid (S, S-EDDS). The efficiency of this novel ...

Article

Resonance Raman detection of the Fe2+-C-N modes in heme-copper oxidases: A probe of the active site

Pinakoulaki, Eftychia; Vamvouka, M.; Varotsis, Constantinos (2004)

Resonance Raman spectroscopy has been employed to investigate the reduced cyano complexes of cytochrome aa3 from bovine heart and Rhodobacter sphaeroides and of cytochrome bo3 from E. coli. In the aa 3-type oxidases, the ...

Article

A study of volatile organic compounds evolved from the decaying human body

Statheropoulos, Miltiades K.; Spiliopoulou, C.; Agapiou, Agapios (2005)

Two men were found dead near the island of Samos, Greece, in the Mediterranean sea. The estimated time of death for both victims was 3-4 weeks. Autopsy revealed no remarkable external injuries or acute poisoning. The exact ...

Article

Synthesis, Crystallographic Studies, and Characterization of K 2Bi8Se13-xSx Solid Solutions

Kyratsi, Theodora; Kanatzidis, M. G. (2003)

The detailed crystal structures of selected members of solid solutions of the thermoelectric compounds K2Bi8Se13-xS x with x = 4, x = 6 and x = 10 were determined. The purpose of this study was to understand the nature of ...

Article

Thorium determination in aqueous solutions after separation by ion-exchange and liquid extraction

Kiliari, T.; Pashalidis, Ioannis (2011)

The concentration of thorium in aqueous samples has been determined by means of alpha-spectroscopy and UV-Vis photometry after chemical separation and pre-concentration of the actinide by cation exchange and liquid-liquid ...