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Lüders KA, Braunschweig L, Zioła-Frankowska A, Stojek A, Jakkielska D, Wichmann A, Dihazi GH, Streit F, Güsewell SE, Trüe TC, Lüders S, Schlie J, Tsaknakis K, Lorenz HM, Frankowski M, Hell AK. Titanium wear from magnetically controlled growing rods (MCGRs) for the treatment of spinal deformities in children. Sci Rep 2022; 12:10811. [PMID: 35752736 PMCID: PMC9233686 DOI: 10.1038/s41598-022-15057-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 06/17/2022] [Indexed: 11/29/2022] Open
Abstract
Magnetically controlled growing rods (MCGRs) are an effective treatment method for early-onset scoliosis (EOS). In recent years, increasing titanium wear was observed in tissue adjacent to implants and in blood samples of these patients. This study aims to investigate the potential correlation between amount of metal loss and titanium levels in blood during MCGR treatment as well as influencing factors for metal wear. In total, 44 MCGRs (n = 23 patients) were retrieved after an average of 2.6 years of implantation and analyzed using a tactile measurement instrument and subsequent metal loss calculation. Titanium plasma levels (n = 23) were obtained using inductively coupled plasma-mass spectrometry (ICP-MS). The correlation of both parameters as well as influencing factors were analyzed. Titanium abrasion on MCGRs was observed in the majority of implants. There was no correlation of metal implant wear or titanium plasma values to the duration of MCGR implantation time, number of external lengthening procedures, patient’s ambulatory status, gender, weight or height. Material loss on the MCGRs showed a positive correlation to titanium blood plasma values. The present study is one of the first studies to analyze retrieved MCGRs using high-precision metrological techniques and compare these results with ICP-MS analyses determining blood titanium values.
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Affiliation(s)
- K A Lüders
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - L Braunschweig
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | | | - A Stojek
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
| | - D Jakkielska
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
| | - A Wichmann
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - G H Dihazi
- Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - F Streit
- Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - S E Güsewell
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - T C Trüe
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | | | | | - K Tsaknakis
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - H M Lorenz
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - M Frankowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
| | - A K Hell
- Pediatric Orthopaedics, Department of Trauma, Orthopaedic and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany.
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Krawczyk P, Rozmanowski T, Frankowski M. Methanol Electrooxidation at Electrodes Made of Exfoliated Graphite/Nickel/Palladium Composite. Catal Letters 2019. [DOI: 10.1007/s10562-019-02785-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
Analytical methods should be selective and fast. In modern times, scientists strive to meet the criteria of green chemistry, so they choose analytical procedures that are as short as possible and use the least toxic solvents. It is quite obvious that the products intended for human consumption should be characterized as completely as possible. The safety of a drug is dependent mainly on the impurities that it contains. High pressure liquid chromatography and ultra-high pressure liquid chromatography have been proposed as the main techniques for forced degradation and impurity profiling. The aim of this article was to characterize the relevant classification of drug impurities and to review the methods of impurities determination for atorvastatin (ATV) and duloxetine (DLX) (both in active pharmaceutical ingredients and in different dosage forms). These drugs have an impact on two systems of the human body: cardiac and nervous. Simple characteristics of ATV and DLX, their properties and specificity of action on the human body, are also included in this review. The analyzed pharmaceuticals-ATV (brand name Lipiron) and DLX (brand name Cymbalta)-were selected for this study based on annual rankings prepared by Information Medical Statistics.
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Affiliation(s)
- M Kątny
- a Department of Water and Soil Analysis , Adam Mickiewicz University in Poznań , Poznań , Poland
| | - M Frankowski
- a Department of Water and Soil Analysis , Adam Mickiewicz University in Poznań , Poznań , Poland
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Zioła-Frankowska A, Dąbrowski M, Kubaszewski Ł, Rogala P, Kowalski A, Frankowski M. An analysis of factors affecting the mercury content in the human femoral bone. Environ Sci Pollut Res Int 2017; 24:547-557. [PMID: 27734315 PMCID: PMC5219028 DOI: 10.1007/s11356-016-7784-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/26/2016] [Indexed: 05/21/2023]
Abstract
The study was carried out to determine the content of mercury in bone tissue of the proximal femur (head and neck bone) of 95 patients undergoing total hip replacement due to osteoarthritis, using CF-AFS analytical technique. Furthermore, the investigations were aimed at assessing the impact of selected factors, such as age, gender, tobacco smoking, alcohol consumption, exposure to chemical substance at work, type of degenerative changes, clinical evaluation and radiological parameters, type of medications, on the concentration of mercury in the head and neck of the femur, resected in situ. Mercury was obtained in all samples of the head and neck of the femur (n = 190) in patients aged 25-91 years. The mean content of mercury for the whole group of patients was as follows: 37.1 ± 35.0 ng/g for the femoral neck and 24.2 ± 19.5 ng/g for the femoral head. The highest Hg contents were found in femoral neck samples, both in women and men, and they amounted to 169.6 and 176.5 ng/g, respectively. The research showed that the mercury content of bones can be associated with body mass index, differences in body anatomy, and gender. The uses of statistical analysis gave the possibility to define the influence of factors on mercury content in human femoral bones.
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Affiliation(s)
- A Zioła-Frankowska
- Faculty of Chemistry, Department of Analytical Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznan, Poland.
| | - M Dąbrowski
- Department of Spondyloorthopaedics and Biomechanics of the Spine, W. Dega University Hospital, Poznan University of Medical Sciences, 28 Czerwca 1956 135/147, 61-545, Poznan, Poland
| | - Ł Kubaszewski
- Department of Spondyloorthopaedics and Biomechanics of the Spine, W. Dega University Hospital, Poznan University of Medical Sciences, 28 Czerwca 1956 135/147, 61-545, Poznan, Poland
| | - P Rogala
- Department of Orthopedic and Traumatology, W. Dega University Hospital, Poznan University of Medical Sciences, 28 Czerwca 1956 135/147, 61-545, Poznan, Poland
| | - A Kowalski
- Faculty of Chemistry, Department of Water and Soil Analysis, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznan, Poland
| | - M Frankowski
- Faculty of Chemistry, Department of Water and Soil Analysis, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznan, Poland.
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Kowalska-Kus J, Held A, Frankowski M, Nowinska K. Solketal formation from glycerol and acetone over hierarchical zeolites of different structure as catalysts. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.11.018] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kummrow A, Frankowski M, Bock N, Werner C, Dziekan T, Neukammer J. Quantitative assessment of cell viability based on flow cytometry and microscopy. Cytometry A 2012; 83:197-204. [PMID: 23081720 DOI: 10.1002/cyto.a.22213] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 09/06/2012] [Accepted: 09/12/2012] [Indexed: 11/05/2022]
Abstract
We compare flow cytometric and microscopic determination of cell viability by fluorescence labeling using calcein acetoxy-methyl-ester and ethidium homodimer-1 as live and dead stain, respectively. Peripheral blood monocytes served as model system and were accumulated applying density gradients. Subsequently, monocytes were further enriched by magnetic-activated or fluorescence-activated cell sorting (MACS, FACS) targeting the antigen CD14. Identical samples were used for flow cytometric and microscopic analysis to allow direct comparison of both analysis methods. More than 1,000 cells were measured for each sample to minimize the measurement uncertainty caused by counting statistics. We observed good agreement of flow cytometric and microscopic viability measurements. On average, the difference in viability measured by flow cytometry and microscopy amounted to (2.7 ± 1.4)% for live staining and (1.7 ± 1.2)% for dead staining. These deviations were similar to the uncertainty of measurement for cell viability, thus demonstrating that both methods delivered equal results. Besides monocytes, comparison of flow cytometric and microscopy viability for MACS enriched CD34-positive cells also showed consistent results.
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Affiliation(s)
- A Kummrow
- Physikalisch-Technische Bundesanstalt, 10587 Berlin, Germany.
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Frankowski M, Zioła-Frankowska A, Siepak J. Speciation of aluminium fluoride complexes and Al3+ in soils from the vicinity of an aluminium smelter plant by hyphenated High Performance Ion Chromatography Flame Atomic Absorption Spectrometry technique. Microchem J 2010. [DOI: 10.1016/j.microc.2010.02.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Frankowski M, Zioła-Frankowska A, Siepak J. New method for speciation analysis of aluminium fluoride complexes by HPLC–FAAS hyphenated technique. Talanta 2010; 80:2120-6. [DOI: 10.1016/j.talanta.2009.11.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Revised: 10/27/2009] [Accepted: 11/05/2009] [Indexed: 10/20/2022]
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Frankowski M, Siepak M, Zioła A, Novotný K, Vaculovic T, Siepak J. Vertical distribution of heavy metals in grain size fractions in sedimentary rocks: Mosina-Krajkowo water well field, Poland. Environ Monit Assess 2009; 155:493-507. [PMID: 18695992 DOI: 10.1007/s10661-008-0476-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Accepted: 06/25/2008] [Indexed: 05/26/2023]
Abstract
The paper presents the results of heavy metals determination in samples of sedimentary rocks from the Mosina-Krajkowo water well field (Poland). The concentration of heavy metals was analysed by type of rock (sand, gravel, warp, silt, till, and clay). Variation of heavy metal concentrations with depth was studied taking into account the age series of the rocks (fluvial sediments of the modern Warta River valley, sediments of the Baltic Glaciation, tills of the Middle-Polish Glaciation, sediments of the Masovian Interglacial (Holstein), tills of the Poznań series) and granulometric fractions. The grain sizes considered included: >2.0, 2.0-1.0, 1.0-0.5, 0.5-0.25, 0.25-0.1, 0.1-0.063, and <0.063 mm. The concentrations of the heavy metals studied were found to change with the type of rock, age series, and granulometric fraction. The levels of the metals were determined by the technique of atomic absorption spectrometry with flame atomisation (F-AAS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES).
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Affiliation(s)
- M Frankowski
- Department of Water and Soil Analysis, Adam Mickiewicz University, Drzymały 24, 60-613 Poznań, Poland
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Kummrow A, Theisen J, Frankowski M, Tuchscheerer A, Yildirim H, Brattke K, Schmidt M, Neukammer J. Microfluidic structures for flow cytometric analysis of hydrodynamically focussed blood cells fabricated by ultraprecision micromachining. Lab Chip 2009; 9:972-81. [PMID: 19294310 DOI: 10.1039/b808336c] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We present three-dimensional microfluidic structures with integrated optical fibers, mirrors and electrodes for flow cytometric analysis of blood cells. Ultraprecision milling technique was used to fabricate different flow cells featuring single-stage and two-stage cascaded hydrodynamic focusing of particles by a sheath flow. Two dimensional focussing of the sample fluid was proven by fluorescence imaging in horizontal and vertical directions and found to agree satisfactorily with finite element calculations. Focussing of the sample stream down to 5 microm at a particle velocity of 3 m s(-1) is accessible while maintaining stable operation for sample flow rates of up to 20 microL min(-1). In addition to fluorescence imaging, the micro-flow cells were characterised by measurements of pulse shapes and pulse height distributions of monodisperse microspheres. We demonstrated practical use of the microstructures for cell differentiation employing light scatter to distinguish platelets and red blood cells. Furthermore, T-helper lymphocytes labelled by monoclonal antibodies were identified by measuring side scatter and fluorescence.
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Affiliation(s)
- A Kummrow
- Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587, Berlin, Germany.
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Sojka M, Siepak M, Zioła A, Frankowski M, Murat-Błazejewska S, Siepak J. Application of multivariate statistical techniques to evaluation of water quality in the Mała Wełna River (Western Poland). Environ Monit Assess 2008; 147:159-70. [PMID: 18161029 DOI: 10.1007/s10661-007-0107-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Accepted: 11/19/2007] [Indexed: 05/12/2023]
Abstract
The paper presents the results of determinations of physico-chemical parameters of the Mała Wełna waters, a river situated in Wielkopolska voivodeship (Western Poland). Samples for the physico-chemical analysis were taken in eight gauging cross-sections once a month between May and November 2006. To assess the physico-chemical composition of surface water, use was made of multivariate statistical methods of data analysis, viz. cluster analysis (CA), factor analysis (FA), principal components analysis (PCA), and discriminant analysis (DA). They made it possible to observe similarities and differences in the physico-chemical composition of water in the gauging cross-sections, to identify water quality indicators suitable for characterising its temporal and spatial variability, to uncover hidden factors accounting for the structure of the data, and to assess the impact of man-made sources of water pollution.
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Affiliation(s)
- M Sojka
- Subdepartament of Hydrology and Water Resources, August Cieszkowski Agricultural University, Poznań, Poland
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von Helden G, Compagnon I, Blom MN, Frankowski M, Erlekam U, Oomens J, Brauer B, Gerber RB, Meijer G. Mid-IRspectra of different conformers of phenylalanine in the gas phase. Phys Chem Chem Phys 2008; 10:1248-56. [DOI: 10.1039/b713274c] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Savchenko E, Khyzhniy I, Gumenchuk G, Ponomaryov A, Beyer M, Bondybey V, Frankowski M. Photo- and thermally stimulated relaxation processes in pre-irradiated atomic solids. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2006.01.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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