Search Results - "von Bohlen, A"

Separation and enrichment of palladium and gold in biological and environmental samples, adapted to the determination by total reflection X-ray fluorescence by Messerschmidt, J, von Bohlen, A, Alt, F, Klockenkämper, R

“…The reductive co-precipitation of trace and ultra-trace elements together with mercury followed by complete evaporation of the mercury makes it possible to…”
Get more information

Depth profiles of a shallow implanted layer in a Si wafer determined by different methods of thin-layer analysis by Klockenkämper, R, Becker, H.W, Bubert, H, Jenett, H, von Bohlen, A

“…Several different methods of thin-layer analysis have been applied to depth profiling of the same sample on the nanometer scale: two variants of Monte Carlo…”
Get full text

Trace elements in human cancerous and healthy tissues: A comparative study by EDXRF, TXRF, synchrotron radiation and PIXE by Carvalho, M.L., Magalhães, T., Becker, M., von Bohlen, A.

“…It is known that trace elements play an important role in a number of biological processes. These include the activation or inhibition of enzymatic reactions,…”
Get full text

Study on trace elements behaviour in cancerous and healthy tissues of colon, breast and stomach: Total reflection X-ray fluorescence applications by Magalhães, T., Carvalho, M.L., Von Bohlen, A., Becker, M.

“…In this work Total-reflection X-ray fluorescence (TXRF) was used to analyse healthy and cancerous tissues of the same individual along several contiguous thin…”
Get full text

Pericardial, intra-abdominal, and subcutaneous adipose tissue in patients with major depressive disorder by Kahl, K. G., Hueper, K., Schweiger, U., Gutberlet, M., Detlef, A.-M., Weiss, C., von Bohlen, A., Pul, R., Lichtinghagen, R., Wacker, F., Hartung, D.

“…Objective Major depressive disorder (MDD) is associated with an increased risk for developing coronary artery disease (CAD). Recently, pericardial adipose…”
Get full text

Effect of extraction pH on metal speciation in plant root extracts by Weber, G, Messerschmidt, J, von Bohlen, A, Alt, F

“…The species patterns of nutrient and trace metals (K, Ca, Mg, Mn, Fe, Zn) obtained by extraction of plant roots have been determined as a function of…”
Get more information

First report on the uptake of automobile catalyst emitted palladium by European eels ( Anguilla anguilla) following experimental exposure to road dust by Sures, B., Zimmermann, S., Messerschmidt, J., von Bohlen, A., Alt, F.

“…European eels, maintained in water containing road dust, took up palladium from automobile catalysts. Following the introduction of automobile catalysts in the…”
Get full text

X-ray standing waves and scanning electron microscopy — Energy dispersive X-ray emission spectroscopy study of gold nanoparticles by von Bohlen, A., Brücher, M., Holland, B., Wagner, R., Hergenröder, R.

“…A systematic characterization of mono-disperse nanoparticles with nominal diameters of 25 nm, 46 nm, 73 nm, 100 nm, 115 nm, and 250 nm was performed using…”
Get full text

The intestinal parasite Pomphorhynchus laevis as a sensitive accumulation indicator for the platinum group metals Pt, Pd, and Rh by Sures, B., Thielen, F., Baska, F., Messerschmidt, J., von Bohlen, A.

“…Concentrations of the platinum group elements Pt, Pd, and Rh were analyzed by adsorptive cathodic stripping voltammetry (Pt, Rh) and total-reflection X-ray…”
Get full text

Synchrotron radiation induced X-ray standing waves analysis of layered structures by KRÄMER, M, VON BOHLEN, A, STEMEMANN, C, PAULUS, M, HERGENRÖDER, R

“…The X-ray standing waves technique is an interesting method to measure distances, concentration distributions and structures on a nanometer scale. In this…”
Get full text

Development of a procedure for the multi-element determination of trace elements in wine by ICP-MS by Castiñeira, M M, Brandt, R, von Bohlen, A, Jakubowski, N

“…An inductively coupled plasma mass spectrometric (ICP-MS) procedure has been developed for the determination of trace elements in wine. The procedure consists…”
Get full text

Total-reflection X-ray fluorescence moving towards nanoanalysis: a survey by Klockenkämper, Reinhold, von Bohlen, A

“…Within the last 20 years, total-reflection X-ray fluorescence (TXRF) has been applied to solve a lot of analytical problems. It turned out that TXRF gives an…”
Get full text

Analysis of pigments and inks on oil paintings and historical manuscripts using total reflection x-ray fluorescence spectrometry by Klockenkämper, R., von Bohlen, A., Moens, L.

“…Old oil paintings and illuminated historical manuscripts are valuable objects of cultural heritage. Pigments and inks once used for these artefacts today allow…”
Get full text

Accumulation of the precious metals platinum, palladium and rhodium from automobile catalytic converters in Paratenuisentis ambiguus as compared with its fish host, Anguilla anguilla by Zimmermann, S, von Bohlen, A, Messerschmidt, J, Sures, B

“…The platinum group metals (PGM) Pt, Pd and Rh are emitted into the environment mainly by catalytic exhaust gas converters of cars. As PGM accumulate in…”
Get more information

Depth profiles of shallow implanted layers by soft ion sputtering and total-reflection X-ray fluorescence by Krzyżanowska, H., von Bohlen, A., Klockenkämper, R.

“…A new method suitable for depth profiling of shallow layers on different materials is presented. It is based on a soft and planar ion sputtering combined with…”
Get full text

Development and application of a micro-digestion device for elemental analysis of biological samples by von Bohlen, A., Klockenkämper, R., Messerschmidt, J., Alt, F.

“…A commercially available piece of equipment for high pressure ashing was adapted for the digestion of micro-samples of biological origin by a supplementary…”
Get full text

A broad beam ion source used for planar sputter-etching of shallow layers from flat samples and determination of their mass density by von Bohlen, A, Krzyżanowska, H, Klockenkämper, R

“…A special UHV device for sputter-etching of large planar samples is presented, which is based on a broad beam ion source of the Kaufman type. It is designed…”
Get full text

Density-depth profiles of an As-implanted Si wafer studied by repeated planar sputter etching and total reflection x-ray fluorescence analysis by Klockenkämper, R., Krzyżanowska, H., von Bohlen, A.

“…The implantation of a high dose of high‐energy ions into an Si wafer causes amorphization of the original monocrystalline structure within a near‐surface…”
Get full text

Spectroscopic Examination of Two Egyptian Masks: A Combined Method Approach by Vandenabeele, P., von Bohlen, A., Moens, L., Klockenkämper, R., Joukes, F., Dewispelaere, G.

“…The identification of the materials used in painted works of art is of great importance for (art-) historians, conservators and keepers. Total-reflection X-Ray…”
Get full text

A new method for depth-profiling of shallow layers in silicon wafers by repeated chemical etching and total-reflection X-ray fluorescence analysis by Klockenkämper, R, von Bohlen, A

“…A novel method of depth-profiling was applied to a Co-implanted silicon wafer with a dose of nearly 1×10 16 Co atoms cm −2. A rectangular section (3.4 cm 2)…”
Get full text