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Tank A, Tietz T, Loskant J, Zube K, Ritz-Timme S, Hartung B. Parking behaviour under the influence of alcohol. Int J Legal Med 2023; 137:1735-1741. [PMID: 37736761 PMCID: PMC10567862 DOI: 10.1007/s00414-023-03082-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/30/2023] [Indexed: 09/23/2023]
Abstract
Real-life driving studies evaluating the impact of alcohol influence on the ability to park a car are rare but necessary to assess a possible impairment to drive a car in the event of prosecution. In this study, 29 test persons (13 m, 16 f) completed three test drives with real cars, each made up of three different parking situations. While four test persons remained sober, the majority drank a previously calculated amount of alcohol before the second drive; the aim was to reach a blood alcohol concentration (BAC) of 1.1 g/kg. The third drive took place about 2 h later without any further ingestion of alcohol. The impact of BAC on the number of accidents, time needed to finish the drive, the amount of correction moves and quality of the final parking position (in the centre of the parking space) were analysed. Furthermore, pressure measuring films were applied to the test cars, measuring the average pressure and load in the areas of the accident impact. A significant increase of accidents could be noted with rising BAC. While a single accident happened to both sober and drivers under the influence of alcohol, more than one accident was only seen in drivers after the ingestion of alcohol (> 0.63 g/kg). The BAC had no impact on the other considered aspects. Concludingly, more than one impact site or accident while parking a car can serve as an indication for alcohol impairment of the driver at the time of the accident.
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Affiliation(s)
- A Tank
- Institute of Legal Medicine, University Hospital Duesseldorf, Duesseldorf, Germany.
- Labor Lademannbogen MVZ GmbH, Hamburg, Germany.
| | - T Tietz
- Institute of Mathematics, Heinrich Heine University Duesseldorf, Duesseldorf, Germany
| | - J Loskant
- DEKRA Automobil GmbH Duesseldorf, Duesseldorf, Germany
| | - K Zube
- Institute of Legal Medicine, University Hospital Duesseldorf, Duesseldorf, Germany
| | - S Ritz-Timme
- Institute of Legal Medicine, University Hospital Duesseldorf, Duesseldorf, Germany
| | - B Hartung
- Institut of Legal Medicine, University Hospital Essen, Essen, Germany
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Ramírez V, Merkel S, Tietz T, Rivas A. Risk assessment of food contact materials. EFSA J 2023; 21:e211015. [PMID: 38047134 PMCID: PMC10687752 DOI: 10.2903/j.efsa.2023.e211015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023] Open
Abstract
Bisphenol A (BPA) is authorised for use as a chemical compound for the production of plastic food contact materials (FCMs) under Regulation (EU) No 10/2011. But according to requirements of the Regulation (EU) No 2018/213, BPA has been banned in the manufacture of polycarbonate drinking cups or feeding bottles intended for infants and young children. Food has been identified as the main source of human exposure to BPA, followed by dermal absorption, air and dust inhalation, revealing ubiquitous and continuous contact with BPA. Considering that BPA is able to enter the food chain through the migration from food packaging into foodstuffs, assessment of dietary exposure is necessary for accurate estimations and identification of potential exposure from food sources. In 2015, EFSA set a temporary tolerable daily intake (TDI) for BPA of 4 μg/kg body weight (bw) per day and concluded that no health concern from BPA exposure for any age group was to be expected. In 2023, EFSA has re-evaluated BPA safety and the new TDI was reduced by a factor of 20,000 resulting in a TDI of 0.2 ng/kg bw per day. In this case, the CEP Panel concluded that there is a health concern from dietary exposure to BPA. Amongst others, the BfR identified several points of criticism which, in the opinion of the BfR, call into question the risk assessment carried out by EFSA. The BfR derived a TDI of 200 ng/kg bw per day and suggests taking this into account for risk assessment. In the proposed EU-FORA programme, the fellow had the opportunity to gain experience in the exposure assessment and then integrate the data together with the BfR hazard assessment to perform a comprehensive risk assessment. As second objective of the work programme, the fellow was in charge of performing a toxicokinetic analysis in an attempt to correlate external exposure with urinary BPA levels.
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Affiliation(s)
- Viviana Ramírez
- Department of Chemicals and Product SafetyGerman Federal Institute for Risk Assessment (BfR)BerlinGermany
| | - Stefan Merkel
- Institute of Nutrition and Food Technology “Jose Mataix Verdú”, Biomedical Research CentreUniversity of GranadaGranadaSpain
| | - Thomas Tietz
- Institute of Nutrition and Food Technology “Jose Mataix Verdú”, Biomedical Research CentreUniversity of GranadaGranadaSpain
| | - Ana Rivas
- Department of Chemicals and Product SafetyGerman Federal Institute for Risk Assessment (BfR)BerlinGermany
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Carvalho OT, Tietz T, Zellmer S, Ebner I, Merkel S. Risk assessment of food contact materials. EFSA J 2022; 20:e200920. [DOI: 10.2903/j.efsa.2022.e200920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
| | - Thomas Tietz
- Department of Chemicals and Product Safety Germany
| | | | - Ingo Ebner
- Department of Chemicals and Product Safety Germany
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Beneventi E, Goldbeck C, Zellmer S, Merkel S, Luch A, Tietz T. Migration of styrene oligomers from food contact materials: in silico prediction of possible genotoxicity. Arch Toxicol 2022; 96:3013-3032. [PMID: 35963937 PMCID: PMC9376037 DOI: 10.1007/s00204-022-03350-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 07/21/2022] [Indexed: 11/26/2022]
Abstract
Styrene oligomers (SO) are well-known side products formed during styrene polymerization. They consist mainly of dimers (SD) and trimers (ST) that have been shown to be still residual in polystyrene (PS) materials. In this study migration of SO from PS into sunflower oil at temperatures between 5 and 70 °C and contact times between 0.5 h and 10 days was investigated. In addition, the contents of SD and ST in the fatty foodstuffs créme fraiche and coffee cream, which are typically enwrapped in PS, were measured and the amounts detected (of up to 0.123 mg/kg food) were compared to literature data. From this comparison, it became evident, that the levels of SO migrating from PS packaging into real food call for a comprehensive risk assessment. As a first step towards this direction, possible genotoxicity has to be addressed. Due to technical and experimental limitations, however, the few existing in vitro tests available are unsuited to provide a clear picture. In order to reduce uncertainty of these in vitro tests, four different knowledge and statistics-based in silico tools were applied to such SO that are known to migrate into food. Except for SD4 all evaluated SD and ST showed no alert for genotoxicity. For SD4, either the predictions were inconclusive or the substance was assigned as being out of the chemical space (out of domain) of the respective in silico tool. Therefore, the absence of genotoxicity of SD4 requires additional experimental proof. Apart from SD4, in silico studies supported the limited in vitro data that indicated the absence of genotoxicity of SO. In conclusion, the overall migration of all SO together into food of up to 50 µg/kg does not raise any health concerns, given the currently available in silico and in vitro data.
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Affiliation(s)
- Elisa Beneventi
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Christophe Goldbeck
- Chemical and Veterinary, Analytical Institute Muensterland-Emscher-Lippe (CVUA-MEL), 48147, Münster, Germany
| | - Sebastian Zellmer
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Stefan Merkel
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Andreas Luch
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Thomas Tietz
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany.
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Galbiati E, Tietz T, Zellmer S, Merkel S. Risk Assessment of Food Contact Materials II. EFSA J 2022; 20:e200408. [PMID: 35634565 PMCID: PMC9131608 DOI: 10.2903/j.efsa.2022.e200408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
| | - Thomas Tietz
- German Federal Institute for Risk Assessment (BfR) Germany
| | | | - Stefan Merkel
- German Federal Institute for Risk Assessment (BfR) Germany
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Abstract
Food contact materials (FCM) can contain chemicals that could migrate from the material itself to the foodstuff posing health concerns if ingested in non-safe quantities by the consumer. FCM include containers, packaging, machinery or kitchenware and can be made from different materials like plastics, paper and board, metal or glass. Printing inks are also an important part of FCM. FCM have an important role in preventing damage or spoilage of the foodstuff and are essential along the food chain. Therefore, their safety needs to be carefully assessed in order to reduce the exposure to potentially hazardous substances and protect the health of the consumer. At the EU level, the legislation on FCM establishes general safety requirements for FCM. In addition, for certain materials, specific measures concerning usage and release of substances have been set. For materials or articles not specifically regulated in this harmonised framework, safety must be proven on a case-by-case basis. National legislations and lists of substances evaluated by competent authorities are important data sources in this context. One of the most important databases are the 'BfR Recommendations on Food Contact Materials' and the soon to come German national regulation on printing inks. BfR Unit 74, besides dealing with chemical risk assessment of FCM, is responsible for the evaluation of application dossiers for including substances into the BfR recommendations on FCM or the substance list of the printing inks regulation. Through the proposed work programme the fellow has been involved in risk assessment of substances that migrate from FCM into foodstuff gaining experience in the methodologies used to perform the scientific data evaluation as well as to support the BfR Unit 74s work.
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Tietz T, Lenzner A, Kolbaum AE, Zellmer S, Riebeling C, Gürtler R, Jung C, Kappenstein O, Tentschert J, Giulbudagian M, Merkel S, Pirow R, Lindtner O, Tralau T, Schäfer B, Laux P, Greiner M, Lampen A, Luch A, Wittkowski R, Hensel A. Aggregated aluminium exposure: risk assessment for the general population. Arch Toxicol 2019; 93:3503-3521. [PMID: 31659427 DOI: 10.1007/s00204-019-02599-z] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/15/2019] [Indexed: 11/27/2022]
Abstract
Aluminium is one of the most abundant elements in earth's crust and its manifold uses result in an exposure of the population from many sources. Developmental toxicity, effects on the urinary tract and neurotoxicity are known effects of aluminium and its compounds. Here, we assessed the health risks resulting from total consumer exposure towards aluminium and various aluminium compounds, including contributions from foodstuffs, food additives, food contact materials (FCM), and cosmetic products. For the estimation of aluminium contents in foodstuff, data from the German "Pilot-Total-Diet-Study" were used, which was conducted as part of the European TDS-Exposure project. These were combined with consumption data from the German National Consumption Survey II to yield aluminium exposure via food for adults. It was found that the average weekly aluminium exposure resulting from food intake amounts to approx. 50% of the tolerable weekly intake (TWI) of 1 mg/kg body weight (bw)/week, derived by the European Food Safety Authority (EFSA). For children, data from the French "Infant Total Diet Study" and the "Second French Total Diet Study" were used to estimate aluminium exposure via food. As a result, the TWI can be exhausted or slightly exceeded-particularly for infants who are not exclusively breastfed and young children relying on specially adapted diets (e.g. soy-based, lactose free, hypoallergenic). When taking into account the overall aluminium exposure from foods, cosmetic products (cosmetics), pharmaceuticals and FCM from uncoated aluminium, a significant exceedance of the EFSA-derived TWI and even the PTWI of 2 mg/kg bw/week, derived by the Joint FAO/WHO Expert Committee on Food Additives, may occur. Specifically, high exposure levels were found for adolescents aged 11-14 years. Although exposure data were collected with special regard to the German population, it is also representative for European and comparable to international consumers. From a toxicological point of view, regular exceedance of the lifetime tolerable aluminium intake (TWI/PTWI) is undesirable, since this results in an increased risk for health impairments. Consequently, recommendations on how to reduce overall aluminium exposure are given.
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Affiliation(s)
- Thomas Tietz
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany.
| | - Ariane Lenzner
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Anna Elena Kolbaum
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Sebastian Zellmer
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Christian Riebeling
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Rainer Gürtler
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Christian Jung
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Oliver Kappenstein
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Jutta Tentschert
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Michael Giulbudagian
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Stefan Merkel
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Ralph Pirow
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Oliver Lindtner
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Tewes Tralau
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Bernd Schäfer
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Peter Laux
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Matthias Greiner
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Alfonso Lampen
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Andreas Luch
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Reiner Wittkowski
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
| | - Andreas Hensel
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany
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Affiliation(s)
- T. Tietz
- Department of Theoretical Physics, University of Lódż, Lódż-Poland
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Tietz T, Limberg C, Stösser R, Ziemer B. Four-coordinate trispyrazolylboratomanganese and -iron complexes with a pyrazolato co-ligand: syntheses and properties as oxidation catalysts. Chemistry 2011; 17:10010-20. [PMID: 21744398 DOI: 10.1002/chem.201100343] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Indexed: 11/06/2022]
Abstract
A series of complexes of the type [(Tp(R1,R2))M(X)] (Tp = trispyrazolylborato) with R(1)/R(2) combinations Me/tBu, Ph/Me, iPr/iPr, Me/Me and for M = Mn or Fe coordinating [Pz(Me,tBu)](-) (Pz = pyrazolato) or Cl(-) as co-ligand X has been synthesised. Although the chloride complexes were very unreactive and stable in air, the pyrazolato series was far more reactive in contact with oxidants like O(2) and tBuOOH. The [(Tp(R1,R2))M(Pz(Me,tBu))] complexes proved to be active pre-catalysts for the oxidation of cyclohexene with tBuOOH, reaching turnover frequencies (TOFs) ranging between moderate and good in comparison to other manganese catalysts. Cyclohexene-3-one and cyclohexene-3-ol were always found to represent the main products, with cyclohexene oxide occasionally formed as a side product. The ratios of the different oxidation products varied with the reaction conditions: in the case of a peroxide/alkene ratio of 4:1, considerably more ketone than alcohol was obtained and cyclohexene oxide formation was almost negligible, whereas a ratio of 1:10 led to a significant increase of the alcohol proportion and to the formation of at least small amounts of the epoxide. Pre-treatment of the dissolved [(Tp(R1,R2))M(Pz(Me,tBu))] pre-catalysts with O(2) led to product distributions and TOFs that were very similar to those found in the absence of O(2), so that it may be argued that tBuOOH and O(2) both lead to the same active species. The results of EPR spectroscopy and ESI-MS suggest that the initial product of the reaction of [(Tp(Me,Me))Mn(Pz(Me,tBu))] with O(2) contains a Mn(III)(O)(2)Mn(IV) core. Prolonged exposure to O(2) leads to a different dinuclear complex containing three O-bridges and resulting in different TOFs/product distributions. Analogous findings were made for other complexes and formation of these overoxidised products may explain the deviation of the catalytic performances if the reactions are carried out in an O(2) atmosphere.
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Affiliation(s)
- Thomas Tietz
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
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Haack P, Limberg C, Tietz T, Metzinger R. Unprecedented binding and activation of CS2 in a dinuclear copper(i) complex. Chem Commun (Camb) 2011; 47:6374-6. [DOI: 10.1039/c1cc11518a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wagner M, Limberg C, Tietz T. A Novel Tripodal Ligand Containing Three DifferentN-Heterocyclic Donor Functions and Its Application in Catechol Dioxygenase Mimicking. Chemistry 2009; 15:5567-76. [DOI: 10.1002/chem.200802591] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tietz T. Simple Approximations to the One‐Electron Wavefunctions. J Chem Phys 1967. [DOI: 10.1063/1.1711974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T. Tietz
- Department of Theoretical Physics, University of Lódź, Lódź, Poland
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Tietz T. Low‐Energy Scattering of Electrons by Atoms for an S Wave. J Chem Phys 1966. [DOI: 10.1063/1.1727938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tietz T. Erratum : Potential‐Energy Function for Diatomic Molecules. J Chem Phys 1965. [DOI: 10.1063/1.1696839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tietz T. Analytical Expressions for the Total Elastic Cross Section of Electron Scattering by Thomas—Fermi—Dirac and Hartree—Fock Atom. J Chem Phys 1965. [DOI: 10.1063/1.1696140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tietz T. Analytical Method for the Approximate Determination of the Eigenfunctions and Energies of Electrons in Thomas—Fermi Atoms. J Chem Phys 1963. [DOI: 10.1063/1.1734561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Tietz T. Interaction Energy in the Amaldi‐Fermi Theory for a Pair of Simple Negative Ions of the Same Kind with Filled Electronic Shells. J Chem Phys 1961. [DOI: 10.1063/1.1701096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tietz T. Atomic Form Factor of an Electron in the Thomas‐Fermi Atom. J Chem Phys 1959. [DOI: 10.1063/1.1730685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tietz T. Reply to Brinkman's Letter: Concerning My Letter ``Approximate Analytic Solution of the Thomas‐Fermi Equation for Atoms''. J Chem Phys 1955. [DOI: 10.1063/1.1742376] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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