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  1. Article: Removal of uranium from contaminated groundwater using monorhamnolipids and ion flotation

    Hogan, David E. / Stolley, Ryan M. / Boxley, Chett / Amistadi, Mary Kay / Maier, Raina M.

    Journal of environmental management. 2022 Jan. 01, v. 301

    2022  

    Abstract: Mining of uranium for defense-related purposes has left a substantial legacy of pollution that threatens human and environmental health. Contaminated waters in the arid southwest are of particular concern, as water resource demand and water scarcity ... ...

    Abstract Mining of uranium for defense-related purposes has left a substantial legacy of pollution that threatens human and environmental health. Contaminated waters in the arid southwest are of particular concern, as water resource demand and water scarcity issues become more pronounced. The development of remediation strategies to treat uranium impacted waters will become increasingly vital to meet future water needs. Ion flotation is one technology with the potential to address legacy uranium contamination. The green biosurfactant rhamnolipid has been shown to bind uranium and act as an effective collector in ion flotation. In this study, uranium contaminated groundwater (∼440 μg L⁻¹ U) from the Monument Valley processing site in northeast Arizona was used as a model solution to test the uranium removal efficacy of ion flotation with biosynthetic (bio-mRL) and three synthetic monorhamnolipids with varying hydrophobic chain lengths: Rha-C10-C10, Rha-C12-C12, and Rha-C14-C14. At the groundwater's native pH 8, and at an adjusted pH 7, no uranium was removed from solution by any collector. However, at pH 6.5 bio-mRL and Rha-C10-C10 removed 239.2 μg L⁻¹ and 242.4 μg L⁻¹ of uranium, respectively. By further decreasing the pH to 5.5, bio-mRL was able to reduce the uranium concentration to near or below the Environmental Protection Agency maximum contaminant level of 30 μg L⁻¹. For the Rha-C12-C12 and Rha-C14-C14 collector ligands, decreasing the pH to 7 or below reduced the foam stability and quantity, such that these collectors were not suitable for treating this groundwater. To contextualize the results, a geochemical analysis of the groundwater was conducted, and a consideration of uranium speciation is described. Based on this study, the efficacy of monorhamnolipid-based ion flotation in real world groundwater has been demonstrated with suitable solution conditions and collectors identified.
    Keywords biosurfactants ; biosynthesis ; environmental health ; foams ; groundwater ; groundwater contamination ; humans ; hydrophobicity ; ligands ; maximum contaminant level ; monuments ; pH ; remediation ; rhamnolipids ; uranium ; water shortages ; Arizona
    Language English
    Dates of publication 2022-0101
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2021.113835
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  2. Article ; Online: Lung-Based, Exosome Inhibition Mediates Systemic Impacts Following Particulate Matter Exposure.

    Lopez, Keegan / Camacho, Alexandra / Jacquez, Quiteria / Amistadi, Mary Kay / Medina, Sebastian / Zychowski, Katherine

    Toxics

    2022  Volume 10, Issue 8

    Abstract: Particulate matter (PM) exposure is a global health issue that impacts both urban and rural communities. Residential communities in the Southwestern United States have expressed concerns regarding the health impacts of fugitive PM from rural, legacy mine- ...

    Abstract Particulate matter (PM) exposure is a global health issue that impacts both urban and rural communities. Residential communities in the Southwestern United States have expressed concerns regarding the health impacts of fugitive PM from rural, legacy mine-sites. In addition, the recent literature suggests that exosomes may play a role in driving toxicological phenotypes following inhaled exposures. In this study, we assessed exosome-driven mechanisms and systemic health impacts following inhaled dust exposure, using a rodent model. Using an exosome inhibitor, GW4869 (10 μM), we inhibited exosome generation in the lungs of mice via oropharyngeal aspiration. We then exposed mice to previously characterized inhaled particulate matter (PM) from a legacy mine-site and subsequently assessed downstream behavioral, cellular, and molecular biomarkers in lung, serum, and brain tissue. Results indicated that CCL-2 was significantly upregulated in the lung tissue and downregulated in the brain (p < 0.05) following PM exposure. Additional experiments revealed cerebrovascular barrier integrity deficits and increased glial fibrillary acidic protein (GFAP) staining in the mine-PM exposure group, mechanistically dependent on exosome inhibition. An increased stress and anxiety response, based on the open-field test, was noted in the mine-PM exposure group, and subsequently mitigated with GW4869 intervention. Exosome lipidomics revealed 240 and eight significantly altered positive-ion lipids and negative-ion lipids, respectively, across the three treatment groups. Generally, phosphatidylethanolamine (PE) and phosphatidylcholine (PC) lipids were significantly downregulated in the PM group, compared to FA. In conclusion, these data suggest that systemic, toxic impacts of inhaled PM may be mechanistically dependent on lung-derived, circulating exosomes, thereby driving a systemic, proinflammatory phenotype.
    Language English
    Publishing date 2022-08-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2733883-6
    ISSN 2305-6304 ; 2305-6304
    ISSN (online) 2305-6304
    ISSN 2305-6304
    DOI 10.3390/toxics10080457
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  3. Article ; Online: Removal of uranium from contaminated groundwater using monorhamnolipids and ion flotation.

    Hogan, David E / Stolley, Ryan M / Boxley, Chett / Amistadi, Mary Kay / Maier, Raina M

    Journal of environmental management

    2021  Volume 301, Page(s) 113835

    Abstract: Mining of uranium for defense-related purposes has left a substantial legacy of pollution that threatens human and environmental health. Contaminated waters in the arid southwest are of particular concern, as water resource demand and water scarcity ... ...

    Abstract Mining of uranium for defense-related purposes has left a substantial legacy of pollution that threatens human and environmental health. Contaminated waters in the arid southwest are of particular concern, as water resource demand and water scarcity issues become more pronounced. The development of remediation strategies to treat uranium impacted waters will become increasingly vital to meet future water needs. Ion flotation is one technology with the potential to address legacy uranium contamination. The green biosurfactant rhamnolipid has been shown to bind uranium and act as an effective collector in ion flotation. In this study, uranium contaminated groundwater (∼440 μg L
    MeSH term(s) Environmental Pollution ; Groundwater ; Humans ; Mining ; Uranium/analysis ; Water Pollutants, Radioactive/analysis
    Chemical Substances Water Pollutants, Radioactive ; Uranium (4OC371KSTK)
    Language English
    Publishing date 2021-09-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2021.113835
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    In stock of ZB MED Bonn / Germany

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  4. Article: Differential Effects of Arsenic in Drinking Water on Mouse Hepatic and Intestinal Heme Oxygenase-1 Expression

    Li, Hui / Fan, Xiaoyu / Wu, Xiangmeng / Han, Weiguo / Amistadi, Mary Kay / Liu, Pengfei / Zhang, Donna / Chorover, Jon / Ding, Xinxin / Zhang, Qing-Yu

    Antioxidants. 2022 Sept. 18, v. 11, no. 9

    2022  

    Abstract: Arsenic exposure has been associated with the risks of various diseases, including cancers and metabolic diseases. The aim of this study was to examine the effects of arsenic exposure via drinking water on the expression of heme oxygenase-1 (HO-1), a ... ...

    Abstract Arsenic exposure has been associated with the risks of various diseases, including cancers and metabolic diseases. The aim of this study was to examine the effects of arsenic exposure via drinking water on the expression of heme oxygenase-1 (HO-1), a major responsive gene to arsenic-induced oxidative stress, in mouse intestinal epithelial cells which is the first site of exposure for ingested arsenic, and the liver, a known target of arsenic toxicity. The expression of HO-1 was determined at mRNA, protein, or enzymic activity levels in mice exposed to sodium arsenite through drinking water, at various doses (0, 2.5, 10, 25, 100 ppm), and for various time periods (1, 3, 7, or 28 days). HO-1 was significantly induced in the intestine, but not liver, at arsenic doses of 25 ppm or lower. The intestinal HO-1 induction was seen in both males and females, plateaued within 1–3 days of exposure, and was accompanied by increases in microsomal HO activity. In mice exposed to 25-ppm of arsenite for 7 days, total arsenic and As(III) levels in intestinal epithelial cells were significantly higher than in the liver. These findings identify intestinal epithelial cells as likely preferential targets for arsenic toxicity and support further studies on the functional consequences of intestinal HO-1 induction.
    Keywords arsenic ; enzyme activity ; epithelium ; genes ; heme oxygenase (biliverdin-producing) ; intestines ; liver ; mice ; oxidative stress ; sodium arsenite ; toxicity
    Language English
    Dates of publication 2022-0918
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2704216-9
    ISSN 2076-3921
    ISSN 2076-3921
    DOI 10.3390/antiox11091835
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  5. Article: Rare earth elements (REY) sorption on soils of contrasting mineralogy and texture

    Dinali, Guilherme Soares / Root, Robert A / Amistadi, Mary Kay / Chorover, Jon / Lopes, Guilherme / Guilherme, Luiz Roberto Guimarães

    Environment international. 2019 July, v. 128

    2019  

    Abstract: Rare earth elements (REY) are the lanthanide elements (Z = 57–71), which have an ever-growing occurrence in present-day industries, agriculture, and modern life. Consequently, environmental concentrations are expected to increase accordingly as a result ... ...

    Abstract Rare earth elements (REY) are the lanthanide elements (Z = 57–71), which have an ever-growing occurrence in present-day industries, agriculture, and modern life. Consequently, environmental concentrations are expected to increase accordingly as a result of intensified utilization. Soils are an important sink for REY, yet little research has been conducted concerning activity, inputs, and lability in soil systems. This study evaluated the REY (lanthanides + yttrium) sorption and partition coefficients (Kd) in two broadly representative natural soils (A horizon), with contrasting mineralogy and organic character, formed under distinct environmental conditions: an Oxisol from Brazil and a Mollisol from the USA. Batch reactions of soils suspended in a background electrolyte solution of 5 μmoles kg−1 of Ca(NO3)2 at 1:100 solid to solution were reacted with 80 μmoles kg−1 REY added individually and in multi-REY competitive systems to evaluated adsorption after 3 h and 72 h over a wide pH range (from ca. 2 to 8). Results showed sorption was similar for all REY within each soil type when examined at the natural measured soil pH; Mollisol pH 6.85, Oxisol pH 4.35. However, REY sorption (by Kd) was nearly two-fold greater in the Mollisol compared to the Oxisol for the single REY experiments. Multi-REY competitive sorption reactions showed a decrease in Kd for both soils at 3 and 72 h, and to a greater extent for the Mollisol, indicating soil type had a strong effect on the sorption affinity of each REY. It was also observed that REY sorption increased from low to high pH (pH 2–8) in the Oxisol, and increased with pH from 2 up to the point zero charge (PZC) in the Mollisol, then stabilized. The varying REY Kd values from these two distinct and abundant soils, with and without REY competition, and over a range of pH are explained in terms of soil mineralogy (i.e., 2:1 clays in the Mollisol; oxides in the Oxisol) and organic matter content. Our findings show that soil characteristic controls sorption, precipitation, and cation exchange capacity, which are the key mechanisms for predicting REY fate and transport in the environment.
    Keywords A horizons ; Mollisols ; Oxisols ; adsorption ; calcium nitrate ; cation exchange capacity ; electrolytes ; environmental factors ; industry ; mineralogy ; organic matter ; oxides ; partition coefficients ; prediction ; rare earth elements ; soil mineralogy ; soil pH ; texture ; yttrium ; Brazil ; United States
    Language English
    Dates of publication 2019-07
    Size p. 279-291.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 554791-x
    ISSN 1873-6750 ; 0160-4120
    ISSN (online) 1873-6750
    ISSN 0160-4120
    DOI 10.1016/j.envint.2019.04.022
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3131: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Differential Effects of Arsenic in Drinking Water on Mouse Hepatic and Intestinal Heme Oxygenase-1 Expression.

    Li, Hui / Fan, Xiaoyu / Wu, Xiangmeng / Han, Weiguo / Amistadi, Mary Kay / Liu, Pengfei / Zhang, Donna / Chorover, Jon / Ding, Xinxin / Zhang, Qing-Yu

    Antioxidants (Basel, Switzerland)

    2022  Volume 11, Issue 9

    Abstract: Arsenic exposure has been associated with the risks of various diseases, including cancers and metabolic diseases. The aim of this study was to examine the effects of arsenic exposure via drinking water on the expression of heme oxygenase-1 (HO-1), a ... ...

    Abstract Arsenic exposure has been associated with the risks of various diseases, including cancers and metabolic diseases. The aim of this study was to examine the effects of arsenic exposure via drinking water on the expression of heme oxygenase-1 (HO-1), a major responsive gene to arsenic-induced oxidative stress, in mouse intestinal epithelial cells which is the first site of exposure for ingested arsenic, and the liver, a known target of arsenic toxicity. The expression of HO-1 was determined at mRNA, protein, or enzymic activity levels in mice exposed to sodium arsenite through drinking water, at various doses (0, 2.5, 10, 25, 100 ppm), and for various time periods (1, 3, 7, or 28 days). HO-1 was significantly induced in the intestine, but not liver, at arsenic doses of 25 ppm or lower. The intestinal HO-1 induction was seen in both males and females, plateaued within 1-3 days of exposure, and was accompanied by increases in microsomal HO activity. In mice exposed to 25-ppm of arsenite for 7 days, total arsenic and As(III) levels in intestinal epithelial cells were significantly higher than in the liver. These findings identify intestinal epithelial cells as likely preferential targets for arsenic toxicity and support further studies on the functional consequences of intestinal HO-1 induction.
    Language English
    Publishing date 2022-09-18
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704216-9
    ISSN 2076-3921
    ISSN 2076-3921
    DOI 10.3390/antiox11091835
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  7. Article ; Online: Association between the polymorphism of three genes involved in the methylation and efflux of arsenic (As3MT, MRP1, and P-gp) with lung cancer in a Mexican cohort.

    Recio-Vega, Rogelio / Hernandez-Gonzalez, Sandra / Michel-Ramirez, Gladis / Olivas-Calderón, Edgar / Lantz, R Clark / Gandolfi, A Jay / Amistadi, Mary Kay

    Journal of applied toxicology : JAT

    2020  Volume 41, Issue 9, Page(s) 1357–1366

    Abstract: Lung cancer is the most common neoplasm and the primary cause-related mortality in developed and in most of nondeveloped countries. Epidemiological studies have demonstrated that even at low arsenic doses, the lungs are one of the main target organs and ... ...

    Abstract Lung cancer is the most common neoplasm and the primary cause-related mortality in developed and in most of nondeveloped countries. Epidemiological studies have demonstrated that even at low arsenic doses, the lungs are one of the main target organs and that chronic arsenic exposure has been associated with an increase in lung cancer development. Among the risk factors for cancer, arsenic methylation efficiency (As3MT) and the clearance of arsenic from cells by two members of the ATP-binding cassette (ABC) transporter family (multidrug resistance protein 1 [MRP1] and P-glycoprotein [P-gp]) play an important role in processing of arsenic and decreasing its intracellular levels. This study aimed to evaluate the association between chronic exposure to arsenic with polymorphism of three proteins involved in arsenic metabolism and efflux of the metalloid in subjects with lung cancer. Polymorphism in As3MT, MRP1, and P-gp modified the arsenic metabolism increasing significantly the As
    MeSH term(s) ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics ; Adult ; Aged ; Aged, 80 and over ; Arsenic/analysis ; Arsenic/metabolism ; Arsenic/urine ; Cohort Studies ; Cross-Sectional Studies ; Drinking Water/analysis ; Environmental Exposure ; Female ; Genotype ; Humans ; Lung Neoplasms/chemically induced ; Lung Neoplasms/epidemiology ; Lung Neoplasms/genetics ; Male ; Methylation ; Methyltransferases/genetics ; Mexico/epidemiology ; Middle Aged ; Multidrug Resistance-Associated Proteins/genetics ; Polymorphism, Genetic/genetics ; Risk Factors ; Surveys and Questionnaires ; Young Adult
    Chemical Substances ATP Binding Cassette Transporter, Subfamily B, Member 1 ; Drinking Water ; Multidrug Resistance-Associated Proteins ; Methyltransferases (EC 2.1.1.-) ; AS3MT protein, human (EC 2.1.1.137) ; Arsenic (N712M78A8G) ; multidrug resistance-associated protein 1 (Y49M64GZ4Q)
    Language English
    Publishing date 2020-12-19
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 604625-3
    ISSN 1099-1263 ; 0260-437X
    ISSN (online) 1099-1263
    ISSN 0260-437X
    DOI 10.1002/jat.4127
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1661: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  8. Article ; Online: Assessment of YAP gene polymorphisms and arsenic interaction in Mexican women with breast cancer.

    Michel-Ramirez, Gladis / Recio-Vega, Rogelio / Lantz, R Clark / Gandolfi, A Jay / Olivas-Calderon, Edgar / Chau, Binh T / Amistadi, Mary Kay

    Journal of applied toxicology : JAT

    2019  Volume 40, Issue 3, Page(s) 342–351

    Language English
    Publishing date 2019-10-21
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 604625-3
    ISSN 1099-1263 ; 0260-437X
    ISSN (online) 1099-1263
    ISSN 0260-437X
    DOI 10.1002/jat.3907
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1661: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  9. Article ; Online: Rare earth elements (REY) sorption on soils of contrasting mineralogy and texture.

    Dinali, Guilherme Soares / Root, Robert A / Amistadi, Mary Kay / Chorover, Jon / Lopes, Guilherme / Guilherme, Luiz Roberto Guimarães

    Environment international

    2019  Volume 128, Page(s) 279–291

    Abstract: Rare earth elements (REY) are the lanthanide elements (Z = 57-71), which have an ever-growing occurrence in present-day industries, agriculture, and modern life. Consequently, environmental concentrations are expected to increase accordingly as a result ... ...

    Abstract Rare earth elements (REY) are the lanthanide elements (Z = 57-71), which have an ever-growing occurrence in present-day industries, agriculture, and modern life. Consequently, environmental concentrations are expected to increase accordingly as a result of intensified utilization. Soils are an important sink for REY, yet little research has been conducted concerning activity, inputs, and lability in soil systems. This study evaluated the REY (lanthanides + yttrium) sorption and partition coefficients (K
    MeSH term(s) Brazil ; Metals, Rare Earth/analysis ; New Mexico ; Soil/chemistry
    Chemical Substances Metals, Rare Earth ; Soil
    Language English
    Publishing date 2019-05-06
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 554791-x
    ISSN 1873-6750 ; 0160-4120
    ISSN (online) 1873-6750
    ISSN 0160-4120
    DOI 10.1016/j.envint.2019.04.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
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  10. Article: Quantifying Particulate and Colloidal Release of Radionuclides in Waste-Weathered Hanford Sediments

    Perdrial, Nicolas / Amistadi, Mary Kay / Chorover, Jon / LaSharr, Kelsie / Thompson, Aaron

    Journal of environmental quality. 2015 May, v. 44, no. 3

    2015  

    Abstract: At the Hanford Site in the state of Washington, leakage of hyperalkaline, high ionic strength wastewater from underground storage tanks into the vadose zone has induced mineral transformations and changes in radionuclide speciation. Remediation of this ... ...

    Abstract At the Hanford Site in the state of Washington, leakage of hyperalkaline, high ionic strength wastewater from underground storage tanks into the vadose zone has induced mineral transformations and changes in radionuclide speciation. Remediation of this wastewater will decrease the ionic strength of water infiltrating to the vadose zone and could affect the fate of the radionuclides. Although it was shown that radionuclide host phases are thermodynamically stable in the presence of waste fluids, a decrease in solution ionic strength and pH could alter aggregate stability and remobilize radionuclide-bearing colloids and particulate matter. We quantified the release of particulate, colloidal, and truly dissolved Sr, Cs, and I from hyperalkaline-weathered Hanford sediments during a low ionic strength pore water leach and characterized the released particles and colloids using electron microscopy and X-ray diffraction. Although most of the Sr, Cs, and I was released in dissolved form, between 3 and 30% of the Sr and 4 to 18% of the Cs was associated with a dominantly zeolitic mobile particulate fraction. Thus, the removal of hyperalkaline wastewater will likely induce Sr and Cs mobilization that will be augmented by particulate- and colloid-facilitated transport.
    Keywords aggregate stability ; cesium ; colloids ; electron microscopy ; iodine ; ionic strength ; particulates ; pH ; radionuclides ; remediation ; sediments ; strontium ; tanks ; thermodynamics ; vadose zone ; wastewater ; X-ray diffraction ; Washington (state)
    Language English
    Dates of publication 2015-05
    Size p. 945-952.
    Publishing place The American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc.
    Document type Article
    Note epub
    ZDB-ID 120525-0
    ISSN 1537-2537 ; 0047-2425
    ISSN (online) 1537-2537
    ISSN 0047-2425
    DOI 10.2134/jeq2014.09.0388
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    In stock of ZB MED Bonn / Germany

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