1
|
Natalio F, Maria R. Microbial Biomineralization of Alkaline Earth Metal Carbonates on 3D-Printed Surfaces. ACS Appl Mater Interfaces 2024; 16:6327-6336. [PMID: 38205804 PMCID: PMC10859896 DOI: 10.1021/acsami.3c13665] [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] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/29/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024]
Abstract
The biomineralizing bacterium Sporosarcina pasteurii has attracted considerable interest in the area of geotechnical engineering due to its ability to induce extracellular mineralization. The presented study investigated S. pasteurii's potential to induce the mineralization of alkali-earth metal carbonate coatings on different polymeric 3D-printed flat surfaces fabricated by different additive manufacturing methods. The use of calcium, barium, strontium, or magnesium ions as the source resulted in the formation of vaterite (CaCO3), witherite (BaCO3), strontianite (SrCO3), and nesquehonite MgCO3·3H2O, respectively. These mineral coatings generally exhibit a compact, yet variable, thickness and are composed of agglomerated microparticles similar to those formed in solution. However, the mechanism behind this clustering remains unclear. The thermal properties of these biologically induced mineral coatings differ from their inorganic counterpart, highlighting the unique characteristics imparted by the biomineralization process. This work seeks to capitalize on the bacterium S. pasteurii's ability to form an alkali-earth metal carbonate coating to expand beyond its traditional use in geoengineering applications. It lays the ground for a novel integration of biologically induced mineralization of single or multilayered and multifunctional coating materials, for example, aerospace applications.
Collapse
Affiliation(s)
- Filipe Natalio
- Department
of Plant and Environmental Sciences, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Raquel Maria
- Ilse
Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel
| |
Collapse
|
2
|
Shamshoum M, Kuperman OA, Shadmi SK, Itkin M, Malitsky S, Natalio F. 2-NBDG Uptake in Gossypium hirsutum in vitro ovules: exploring tissue-specific accumulation and its impact on hexokinase-mediated glycolysis regulation. Front Plant Sci 2023; 14:1242150. [PMID: 37818315 PMCID: PMC10561253 DOI: 10.3389/fpls.2023.1242150] [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] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 09/04/2023] [Indexed: 10/12/2023]
Abstract
Fluorescent glucose derivatives are valuable tools as glucose analogs in plant research to explore metabolic pathways, study enzyme activity, and investigate cellular processes related to glucose metabolism and sugar transport. They allow visualization and tracking of glucose uptake, its utilization, and distribution within plant cells and tissues. This study investigates the phenotypic and metabolic impact of the exogenously fed glucose derivative, 2-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose) (2-NBDG) on the fibers of Gossypium hirsutum (Upland cotton) ovule in vitro cultures. The presence of 2-NBDG in the culture medium did not lead to macroscopic morphological alterations in ovule and fiber development or to the acquisition of fluorescence or yellow coloration. Confocal laser scanning microscope imaging and chromatographic analysis of cotton ovules' outer rim cross-sections showed that the 2-NBDG is transported from the extracellular space and accumulated inside some outer integument cells, epidermal cells, and fertilized epidermal cells (fibers), but is not incorporated into the cell walls. Untargeted metabolic profiling of the fibers revealed significant changes in the relative levels of metabolites involved in glycolysis and upregulation of alternative energy-related pathways. To provide biochemical and structural evidence for the observed downregulation of glycolysis pathways in the fibers containing 2-NBDG, kinetics analysis and docking simulations were performed on hexokinase from G. hirsutum (GhHxk). Notably, the catalytic activity of heterologously expressed recombinant active GhHxk exhibited a five-fold decrease in reaction rates compared to D-glucose. Furthermore, GhHxk exhibited a linear kinetic behavior in the presence of 2-NBDG instead of the Michaelis-Menten kinetics found for D-glucose. Docking simulations suggested that 2-NBDG interacts with a distinct binding site of GhHxk9, possibly inducing a conformational change. These results highlight the importance of considering fluorescent glucose derivatives as ready-to-use analogs for tracking glucose-related biological processes. However, a direct comparison between their mode of action and its extrapolation into biochemical considerations should go beyond microscopic inspection and include complementary analytical techniques.
Collapse
Affiliation(s)
- Melina Shamshoum
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Ofir Aharon Kuperman
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Sapir Korman Shadmi
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Maxim Itkin
- Metabolic Profiling Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Sergey Malitsky
- Metabolic Profiling Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Filipe Natalio
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| |
Collapse
|
3
|
Shamshoum M, Natalio F. Conserved Active Site Architecture Between Bacterial Cellulose and Chitin Synthases. Chembiochem 2023; 24:e202300388. [PMID: 37253095 DOI: 10.1002/cbic.202300388] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 05/30/2023] [Indexed: 06/01/2023]
Abstract
Glycosyltransferases (GTs) are a large and diverse group of enzymes responsible for catalyzing the formation of a glycosidic bond between a donor molecule, usually a monosaccharide, and a wide range of acceptor molecules, thus, playing critical roles in various essential biological processes. Chitin and cellulose synthases are two inverting processive integral membrane GTs, belonging to the type-2 family involved in the biosynthesis of chitin and cellulose, respectively. Herein, we report that bacterial cellulose and chitin synthases share an E-D-D-ED-QRW-TK active site common motif that is spatially co-localized. This motif is conserved among distant bacterial evolutionary species despite their low amino acid sequence and structural similarities between them. This theoretical framework offers a new perspective to the current view that bacterial cellulose and chitin synthases are substrate specific and that chitin and cellulose are organism specific. It lays the ground for future in vivo and in silico experimental assessment of cellulose synthase catalytic promiscuity against uridine diphosphate N-acetylglucosamine and chitin synthase against uridine diphosphate glucose, respectively.
Collapse
Affiliation(s)
- Melina Shamshoum
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 234 Herzl St., Rehovot, 7610001, Israel
| | - Filipe Natalio
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 234 Herzl St., Rehovot, 7610001, Israel
| |
Collapse
|
4
|
Marom N, Lazagabaster IA, Shafir R, Natalio F, Eisenmann V, Horwitz LK. The Late Middle Pleistocene mammalian fauna of Oumm Qatafa Cave, Judean Desert: taxonomy, taphonomy and palaeoenvironment. J Quat Sci 2022; 37:612-638. [PMID: 35915614 PMCID: PMC9314136 DOI: 10.1002/jqs.3414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 01/13/2022] [Accepted: 01/26/2022] [Indexed: 06/15/2023]
Abstract
The Middle Pleistocene archaeological record of the southern Levant has proven key to understanding human evolution and intercontinental faunal biogeography. Knowledge of archaeological sites of that period in the southern Levant is biased, with most Middle Pleistocene localities in the Mediterranean areas in the north, despite the mosaic of environments that mark the entire region. A key Middle Pleistocene location in the Judean Desert - on the eastern margin of the Mediterranean zone - is the site of Oumm Qatafa, excavated in the early 1900s, which yielded a faunal collection spanning an estimated time period of 600-200 kya. Here, we present a revised taxonomy of the macromammalian fauna from the site, discuss the palaeoenvironmental implications of this assemblage, and relate the finds to other Pleistocene sites from the Levant. These data enable a more precise palaeoenvironmental reconstruction which attests to an open landscape, but with the addition of a mesic Mediterranean component close by. In addition, detailed taphonomic observations on butchery marks and Fourier transform infrared spectroscopy analysis of burnt bone link the fauna for the first time to anthropogenic activities in the cave.
Collapse
Affiliation(s)
- Nimrod Marom
- School of Archaeology and Maritime Cultures & the Recanati Institute for Maritime StudiesUniversity of Haifa, HaifaIsrael
| | - Ignacio A. Lazagabaster
- School of Archaeology and Maritime Cultures & the Recanati Institute for Maritime StudiesUniversity of Haifa, HaifaIsrael
- Museum für Naturkunde, Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University BerlinBerlinGermany
| | - Roee Shafir
- School of Archaeology and Maritime Cultures & the Recanati Institute for Maritime StudiesUniversity of Haifa, HaifaIsrael
| | | | - Vera Eisenmann
- Unité Mixte de Recherche 5143 du Centre National de la Recherche Scientifique, CP 38, Département Histoire de la TerreParisFrance
| | - Liora Kolska Horwitz
- National Natural History CollectionsThe Hebrew University of JerusalemJerusalemIsrael
| |
Collapse
|
5
|
Natalio F, Corrales TP, Feldman Y, Lew B, Graber ER. Sustainable Lightweight Biochar-Based Composites with Electromagnetic Shielding Properties. ACS Omega 2020; 5:32490-32497. [PMID: 33376886 PMCID: PMC7758945 DOI: 10.1021/acsomega.0c04639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
Global warming has prompted a search for new materials that capture and sink carbon dioxide (CO2). Biochar is a derivative of biomass pyrolysis and a carbon sink mainly used to improve crop production. This work explores the underlying mechanism behind biochar's electric conductivity using a wide range of feedstocks and its combination with a binder (gypsum). This gypsum-biochar composite exhibits decreased density and flexural moduli with increasing biochar content, particularly after 20% w/w. Gypsum-biochar drywall-like composite prototypes display increasing shielding efficiency mostly in the microwave range as a function of biochar content, differing from other conventional metal (copper) and synthetic carbon-based materials. This narrow range of electromagnetic interference (EMI) shielding is attributed to natural alignment (isotropy) of the carbon ultrastructure (e.g., lignin) induced by heat and intrinsic interconnectivity in addition to traditional phenomena such as dissipation of surface currents and polarization in the electric field. These biomass-derived products could be used as sustainable lightweight materials in a future bio-based economy.
Collapse
Affiliation(s)
- Filipe Natalio
- Department
of Plant & Environmental Sciences, Weizmann
Institute of Science, Rehovot 7610001, Israel
- Kimmel
Center for Archeological Science, Weizmann
Institute of Science, Rehovot 7610001, Israel
| | - Tomas P. Corrales
- Departamento
de Física, Universidad Técnica
Federico Santa María, Casilla 110-V, Valparaíso, Chile
| | - Yishay Feldman
- Chemical
Services Unit, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Beni Lew
- Institute
of Agricultural Engineering, The Volcani
Center, Agricultural Research Organization, P.O. Box 15159, Rishon LeTzion 7528809, Israel
| | - Ellen R. Graber
- Institute
of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, P.O. Box 15159, Rishon LeTzion 7528809, Israel
| |
Collapse
|
6
|
Agam A, Azuri I, Pinkas I, Gopher A, Natalio F. Publisher Correction: Estimating temperatures of heated Lower Palaeolithic flint artefacts. Nat Hum Behav 2020; 4:1322. [DOI: 10.1038/s41562-020-01017-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
7
|
Natalio F. Tracking the Biological Incorporation of Exogenous Molecules into Cellulose Fibers with Non‐Radioactive Iodinated Glucose. Isr J Chem 2020. [DOI: 10.1002/ijch.202000060] [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: 11/09/2022]
Affiliation(s)
- Filipe Natalio
- Kimmel Center for Archaeological Science Weizmann Institute of Science Rehovot 76100 Israel
- Department of Plant and Environmental Sciences Weizmann Institute of Science Rehovot 76100 Israel
| |
Collapse
|
8
|
Agam A, Azuri I, Pinkas I, Gopher A, Natalio F. Estimating temperatures of heated Lower Palaeolithic flint artefacts. Nat Hum Behav 2020; 5:221-228. [PMID: 33020589 DOI: 10.1038/s41562-020-00955-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 08/19/2020] [Indexed: 11/09/2022]
Abstract
Production of stone artefacts using pyro-technology is known from the Middle and Upper Palaeolithic of Europe and the Levant, and the Middle Stone Age in Africa. However, determination of temperatures to which flint artefacts were exposed is impeded by the chemical and structural variability of flint. Here we combine Raman spectroscopy and machine learning to build temperature-estimation models to infer the degree of pyro-technological control effected by inhabitants of the late Lower Palaeolithic (Acheulo-Yabrudian) site of Qesem Cave, Israel. Temperature estimation shows that blades were heated at lower median temperatures (259 °C) compared to flakes (413 °C), whereas heat-induced structural flint damage (for example, pot-lids and microcracks) appears at 447 °C. These results are consistent with a differential behaviour for selective tool production that can be viewed as part of a plethora of innovative and adaptive behaviours of Levantine hominins >300,000 years ago.
Collapse
Affiliation(s)
- Aviad Agam
- Kimmel Centre for Archaeological Science, Weizmann Institute of Science, Rehovot, Israel
| | - Ido Azuri
- Bioinformatics Unit, Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Iddo Pinkas
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel
| | - Avi Gopher
- Sonia and Marco Nadler Institute of Archaeology, Tel Aviv University, Tel Aviv, Israel
| | - Filipe Natalio
- Kimmel Centre for Archaeological Science, Weizmann Institute of Science, Rehovot, Israel. .,Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel.
| |
Collapse
|
9
|
Spiesz EM, Schmieden DT, Grande AM, Liang K, Schwiedrzik J, Natalio F, Michler J, Garcia SJ, Aubin-Tam ME, Meyer AS. Bacterially Produced, Nacre-Inspired Composite Materials. Small 2019; 15:e1906277. [PMID: 31833665 DOI: 10.1002/smll.201906277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
|
10
|
Spiesz EM, Schmieden DT, Grande AM, Liang K, Schwiedrzik J, Natalio F, Michler J, Garcia SJ, Aubin-Tam ME, Meyer AS. Bacterially Produced, Nacre-Inspired Composite Materials. Small 2019; 15:e1805312. [PMID: 30951252 DOI: 10.1002/smll.201805312] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 12/13/2018] [Revised: 02/27/2019] [Indexed: 05/12/2023]
Abstract
The impressive mechanical properties of natural composites, such as nacre, arise from their multiscale hierarchical structures, which span from nano- to macroscale and lead to effective energy dissipation. While some synthetic bioinspired materials have achieved the toughness of natural nacre, current production methods are complex and typically involve toxic chemicals, extreme temperatures, and/or high pressures. Here, the exclusive use of bacteria to produce nacre-inspired layered calcium carbonate-polyglutamate composite materials that reach and exceed the toughness of natural nacre, while additionally exhibiting high extensibility and maintaining high stiffness, is introduced. The extensive diversity of bacterial metabolic abilities and the possibility of genetic engineering allows for the creation of a library of bacterially produced, cost-effective, and eco-friendly composite materials.
Collapse
Affiliation(s)
- Ewa M Spiesz
- Department of Bionanoscience, Delft University of Technology, Van der Maasweg 9, 2629, HZ Delft, The Netherlands
| | - Dominik T Schmieden
- Department of Bionanoscience, Delft University of Technology, Van der Maasweg 9, 2629, HZ Delft, The Netherlands
| | - Antonio M Grande
- Department of Aerospace Science and Technology, Politecnico di Milano, Via Giuseppe La Masa, 34, 20156, Milan, Italy
| | - Kuang Liang
- Department of Bionanoscience, Delft University of Technology, Van der Maasweg 9, 2629, HZ Delft, The Netherlands
| | - Jakob Schwiedrzik
- Laboratory for Mechanics of Materials and Nanostructures, EMPA Swiss Federal Laboratories for Materials Science and Technology, Überland Str. 129, 8600, Dübendorf, Switzerland
| | - Filipe Natalio
- Weizmann Institute of Science, 234 Herzl St., Rehovot, 7610001, Israel
| | - Johann Michler
- Laboratory for Mechanics of Materials and Nanostructures, EMPA Swiss Federal Laboratories for Materials Science and Technology, Überland Str. 129, 8600, Dübendorf, Switzerland
| | - Santiago J Garcia
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629, HS Delft, The Netherlands
| | - Marie-Eve Aubin-Tam
- Department of Bionanoscience, Delft University of Technology, Van der Maasweg 9, 2629, HZ Delft, The Netherlands
| | - Anne S Meyer
- Department of Biology, University of Rochester, Hutchison Road, Rochester, NY, 14620, USA
| |
Collapse
|
11
|
Edeler D, Drača D, Petković V, Natalio F, Maksimović-Ivanić D, Mijatović S, Schmidt H, Kaluđerović GN. Impact of the mesoporous silica SBA-15 functionalization on the mode of action of Ph 3Sn(CH 2) 6OH. Mater Sci Eng C Mater Biol Appl 2019; 100:315-322. [PMID: 30948067 DOI: 10.1016/j.msec.2019.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 02/22/2019] [Accepted: 03/04/2019] [Indexed: 02/07/2023]
Abstract
Herein appropriateness of nonfunctionalized mesoporous silica nanoparticles SBA-15 and functionalized with (3-chloropropyl)triethoxysilane (→ SBA-15~Cl) and (3-aminopropyl)triethoxysilane (→ SBA-15~NH2) on delivery of physically adsorbed Ph3Sn(CH2)6OH (Sn6) is evaluated. Fluorescent nanomaterial, bearing isatoic moiety, loaded with Sn6 (→ SBA-15~NF|Sn6) was used for cellular uptake study. The fluorescent nanomaterial is efficiently acquired and distributed into the cytoplasm of the cells even after 2 h of cultivation. According to the attained data, all SBA-15 materials loaded with Sn6 diminished cellular viability in dose dependent manner while carriers alone (SBA-15, SBA-15~Cl, SBA-15~NH2) did not show cytotoxicity against B16 cells. According to the MC50 values structural modification of SBA-15 did not improve the efficacy of tested drug. While progressive apoptosis was detected upon the treatment with SBA-15|Sn6, exposure of cells to SBA-15~NH2|Sn6 revealed extinguished apoptosis in time, accompanied with lower caspase activity. This effect is probably due to triggered autophagic process under the treatment with the SBA-15~NH2|Sn6, thus opposed to apoptosis. Presented results suggested that functionalization of SBA-15 was not beneficial for the efficacy of loaded drug, thus, all of them are almost equally efficient considering loaded Sn6 content. Importantly, functionalization of SBA-15 does have an influence on the mode of action and differentiation inducing properties.
Collapse
Affiliation(s)
- David Edeler
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120 Halle, Germany
| | - Dijana Drača
- Institute for Biological Research "Sinisa Stankovic" University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Vladana Petković
- Institute for Biological Research "Sinisa Stankovic" University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Filipe Natalio
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120 Halle, Germany; Department of Plant and Environmental Sciences & Kimmel Center for Archaeological Science Nella & Leon Benoziyo Building for Biological Sciences, Weizmann Institute of Science, 234 Herzl Street, Rehovot 7610001, Israel
| | - Danijela Maksimović-Ivanić
- Institute for Biological Research "Sinisa Stankovic" University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Sanja Mijatović
- Institute for Biological Research "Sinisa Stankovic" University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, Serbia
| | - Harry Schmidt
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120 Halle, Germany
| | - Goran N Kaluđerović
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; Department of Engineering and Natural Sciences, University of Applied Sciences Merseburg, Eberhard-Leibnitz-Strasse 2, 06217 Merseburg, Germany.
| |
Collapse
|
12
|
Natalio F, Fuchs R, Cohen SR, Leitus G, Fritz-Popovski G, Paris O, Kappl M, Butt HJ. Biological fabrication of cellulose fibers with tailored properties. Science 2017; 357:1118-1122. [DOI: 10.1126/science.aan5830] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 08/21/2017] [Indexed: 11/02/2022]
|
13
|
Werner P, Blumtritt H, Natalio F. Organic crystal lattices in the axial filament of silica spicules of Demospongiae. J Struct Biol 2017; 198:186-195. [DOI: 10.1016/j.jsb.2017.03.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 03/10/2017] [Accepted: 03/15/2017] [Indexed: 10/19/2022]
|
14
|
Zakerin M, Novak A, Toda M, Emery Y, Natalio F, Butt HJ, Berger R. Thermal Characterization of Dynamic Silicon Cantilever Array Sensors by Digital Holographic Microscopy. Sensors (Basel) 2017; 17:s17061191. [PMID: 28545236 PMCID: PMC5490691 DOI: 10.3390/s17061191] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 05/17/2017] [Accepted: 05/19/2017] [Indexed: 11/16/2022]
Abstract
In this paper, we apply a digital holographic microscope (DHM) in conjunction with stroboscopic acquisition synchronization. Here, the temperature-dependent decrease of the first resonance frequency (S1(T)) and Young’s elastic modulus (E1(T)) of silicon micromechanical cantilever sensors (MCSs) are measured. To perform these measurements, the MCSs are uniformly heated from T0 = 298 K to T = 450 K while being externally actuated with a piezo-actuator in a certain frequency range close to their first resonance frequencies. At each temperature, the DHM records the time-sequence of the 3D topographies for the given frequency range. Such holographic data allow for the extracting of the out-of-plane vibrations at any relevant area of the MCSs. Next, the Bode and Nyquist diagrams are used to determine the resonant frequencies with a precision of 0.1 Hz. Our results show that the decrease of resonance frequency is a direct consequence of the reduction of the silicon elastic modulus upon heating. The measured temperature dependence of the Young’s modulus is in very good accordance with the previously-reported values, validating the reliability and applicability of this method for micromechanical sensing applications.
Collapse
Affiliation(s)
- Marjan Zakerin
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Antonin Novak
- Laboratoire d'Acoustique de l'Université du Maine (LAUM, UMR CNRS 6613), 72000 Le Mans, France.
| | - Masaya Toda
- Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, Aoba-ku, 980-8579 Sendai, Japan.
| | - Yves Emery
- Lyncee Tec SA, PSE-A, CH-1015 Lausanne, Switzerland.
| | - Filipe Natalio
- Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120 Halle (Saale), Germany.
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Rüdiger Berger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| |
Collapse
|
15
|
Natalio F, Wiese S, Brandt W, Wessjohann L. Reconstitution of Vanadium Haloperoxidase's Catalytic Activity by Boric Acid-Towards a Potential Biocatalytic Role of Boron. Chemistry 2017; 23:4973-4980. [PMID: 28248430 DOI: 10.1002/chem.201605230] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 02/22/2017] [Indexed: 11/09/2022]
Abstract
Boron's unusual properties inspired major advances in chemistry. In nature, the existence and importance of boron has been fairly explored (e.g. bacterial signaling, plant development) but its role as biological catalyst was never reported. Here, we show that boric acid [B(OH)3 ] can restore chloroperoxidase activity of Curvularia inaequalis recombinant apo-haloperoxidase's (HPO) in the presence of hydrogen peroxide and chloride ions. Molecular modeling and semi-empirical PM7 calculations support a thermodynamically highly favored (bio)catalytic mechanism similarly to vanadium haloperoxidases (V-HPO) in which [B(OH)3 ] is assumedly located in apo-HPO's active site and a monoperoxyborate [B(OH)3 (OOH)- ] intermediate is formed and stabilized by interaction with specific active site amino acids leading ultimately to the formation of HOCl. Thus, B(OH)3 -HPO provides the first evidence towards the future exploitation of boron's role in biological systems.
Collapse
Affiliation(s)
- Filipe Natalio
- Kimmel Center for Archaeological Science, Weizmann Institute of Science, Rehovot, 76100, Israel.,Institut für Chemie-Anorganische Chemie, Naturwissenschaftliche Fakultät II-Chemie, Physik und Mathematik, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle, Germany
| | - Stefanie Wiese
- Institut für Chemie-Anorganische Chemie, Naturwissenschaftliche Fakultät II-Chemie, Physik und Mathematik, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle, Germany
| | - Wolfgang Brandt
- Leibniz Institute of Plant Biochemistry, Department of Bioorganic Chemistry, Weinberg 3, Halle, Germany
| | - Ludger Wessjohann
- Leibniz Institute of Plant Biochemistry, Department of Bioorganic Chemistry, Weinberg 3, Halle, Germany
| |
Collapse
|
16
|
Tahir MN, Herzberger J, Natalio F, Köhler O, Branscheid R, Mugnaioli E, Ksenofontov V, Panthöfer M, Kolb U, Frey H, Tremel W. Hierachical Ni@Fe2O3 superparticles through epitaxial growth of γ-Fe2O3 nanorods on in situ formed Ni nanoplates. Nanoscale 2016; 8:9548-9555. [PMID: 26818395 DOI: 10.1039/c6nr00065g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
One endeavour of nanochemistry is the bottom-up synthesis of functional mesoscale structures from basic building blocks. We report a one-pot wet chemical synthesis of Ni@γ-Fe2O3 superparticles containing Ni cores densely covered with highly oriented γ-Fe2O3 (maghemite) nanorods (NRs) by controlled reduction/decomposition of nickel acetate (Ni(ac)2) and Fe(CO)5. Automated diffraction tomography (ADT) of the Ni-Fe2O3 interface in combination with Mössbauer spectroscopy showed that selective and oriented growth of the γ-Fe2O3 nanorods on the Ni core is facilitated through the formation of a Fe0.05Ni0.95 alloy and the appearance of superstructure features that may reduce strain at the Ni-Fe2O3 interface. The common orientation of the maghemite nanorods on the Ni core of the superparticles leads to a greatly enhanced magnetization. After functionalization with a catechol-functional polyethylene glycol (C-PEG) ligand the Ni@γ-Fe2O3 superparticles were dispersible in water.
Collapse
Affiliation(s)
- Muhammad Nawaz Tahir
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | - Jana Herzberger
- Institut für Organische Chemie, Johannes-Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany and Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany
| | - Filipe Natalio
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | - Oskar Köhler
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | - Robert Branscheid
- Institut für Physikalische Chemie, Johannes-Gutenberg-Universität, Welderweg 15, D-55099 Mainz, Germany
| | - Enrico Mugnaioli
- Institut für Physikalische Chemie, Johannes-Gutenberg-Universität, Welderweg 15, D-55099 Mainz, Germany
| | - Vadim Ksenofontov
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | - Martin Panthöfer
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | - Ute Kolb
- Institut für Physikalische Chemie, Johannes-Gutenberg-Universität, Welderweg 15, D-55099 Mainz, Germany
| | - Holger Frey
- Institut für Organische Chemie, Johannes-Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| |
Collapse
|
17
|
Natalio F, Tahir MN, Friedrich N, Köck M, Fritz-Popovski G, Paris O, Paschke R. Structural analysis of Gossypium hirsutum fibers grown under greenhouse and hydroponic conditions. J Struct Biol 2016; 194:292-302. [PMID: 26965558 DOI: 10.1016/j.jsb.2016.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 03/04/2016] [Accepted: 03/06/2016] [Indexed: 10/22/2022]
Abstract
Cotton is the one of the world's most important crops. Like any other crop, cotton growth/development and fiber quality is highly dependent on environmental factors. Increasing global weather instability has been negatively impacting its economy. Cotton is a crop that exerts an intensive pressure over natural resources (land and water) and demands an overuse of pesticides. Thus, the search for alternative cotton culture methods that are pesticide-free (biocotton) and enable customized standard fiber quality should be encouraged. Here we describe a culture of Gossypium hirsutum ("Upland" Cotton) utilizing a greenhouse and hydroponics in which the fibers are morphological similar to conventional cultures and structurally fit into the classical two-phase cellulose I model with 4.19nm crystalline domains surrounded by amorphous regions. These fibers exhibit a single crystalline form of cellulose I-Iß, monoclinic unit cell. Fiber quality bulk analysis shows an improved length, strength, whiteness when compared with soil-based cultures. Finally, we show that our fibers can be spun, used for production of non-woven fabrics and indigo-vat stained demonstrating its potential in industrial and commercial applications.
Collapse
Affiliation(s)
- Filipe Natalio
- Institut für Chemie - Anorganische Chemie, Naturwissenschaftliche Fakultät II-Chemie, Physik und Mathematik, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, Halle 06120, Germany.
| | - Muhammad Nawaz Tahir
- Institut für Anorganische und Analytische Chemie, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Norman Friedrich
- Institut für Chemie - Anorganische Chemie, Naturwissenschaftliche Fakultät II-Chemie, Physik und Mathematik, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, Halle 06120, Germany
| | - Margret Köck
- Martin-Luther-Universität Halle-Wittenberg, Biozentrum, Weinbergweg 22, 06120 Halle, Germany
| | - Gerhard Fritz-Popovski
- Institut für Physik, Montanuniversität Leoben, Franz-Josef-Straße 18, A-8700 Leoben, Austria
| | - Oskar Paris
- Institut für Physik, Montanuniversität Leoben, Franz-Josef-Straße 18, A-8700 Leoben, Austria
| | - Reinhard Paschke
- Martin-Luther-Universität Halle-Wittenberg, Biozentrum, Weinbergweg 22, 06120 Halle, Germany; Institut für Chemie - Organische Chemie, Naturwissenschaftliche Fakultät II-Chemie, Physik und Mathematik, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, Halle 06120, Germany
| |
Collapse
|
18
|
Ragg R, Schilmann AM, Korschelt K, Wieseotte C, Kluenker M, Viel M, Völker L, Preiß S, Herzberger J, Frey H, Heinze K, Blümler P, Tahir MN, Natalio F, Tremel W. Intrinsic superoxide dismutase activity of MnO nanoparticles enhances the magnetic resonance imaging contrast. J Mater Chem B 2016; 4:7423-7428. [DOI: 10.1039/c6tb02078j] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
MnO nanoparticles decompose superoxide and hydrogen peroxide in an enzyme-like manner leading to enhanced MRI contrast.
Collapse
|
19
|
Natalio F, Corrales TP, Wanka S, Zaslansky P, Kappl M, Lima HP, Butt HJ, Tremel W. Siliceous spicules enhance fracture-resistance and stiffness of pre-colonial Amazonian ceramics. Sci Rep 2015; 5:13303. [PMID: 26310998 PMCID: PMC4550886 DOI: 10.1038/srep13303] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 03/03/2015] [Accepted: 07/28/2015] [Indexed: 11/16/2022] Open
Abstract
Pottery was a traditional art and technology form in pre-colonial Amazonian civilizations, widely used for cultural expression objects, utensils and as cooking vessels. Abundance and workability of clay made it an excellent choice. However, inferior mechanical properties constrained their functionality and durability. The inclusion of reinforcement particles is a possible route to improve its resistance to mechanical and thermal damage. The Amazonian civilizations incorporated freshwater tree sponge spicules (cauixí) into the clay presumably to prevent shrinkage and crack propagation during drying, firing and cooking. Here we show that isolated siliceous spicules are almost defect-free glass fibres with exceptional mechanical stability. After firing, the spicule Young’s modulus increases (from 28 ± 5 GPa to 46 ± 8 GPa) inferring a toughness increment. Laboratory-fabricated ceramic models containing different inclusions (sand, glass-fibres, sponge spicules) show that mutually-oriented siliceous spicule inclusions prevent shrinkage and crack propagation leading to high stiffness clays (E = 836 ± 3 MPa). Pre-colonial amazonian potters were the first civilization known to employ biological materials to generate composite materials with enhanced fracture resistance and high stiffness in the history of mankind.
Collapse
Affiliation(s)
- Filipe Natalio
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Duesbergweg 10-14, 55099 Mainz, Germany.,Institut für Chemie, Martin Luther Universität Halle-Wittenberg, Kurt-Mothes Str. 2, 06120 Halle (Saale) Germany
| | - Tomas P Corrales
- Max Planck Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany.,Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7-D Arica, Chile
| | - Stephanie Wanka
- Max Planck Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany
| | - Paul Zaslansky
- Julius Wolff Institut, Charité- Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Michael Kappl
- Max Planck Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany
| | - Helena Pinto Lima
- Museu Paraense Emílio Goeldi (MPEG), Av. Perimetral 1901, Terra Firme, 66070-530, Belém, Brasil
| | - Hans-Jürgen Butt
- Max Planck Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Duesbergweg 10-14, 55099 Mainz, Germany
| |
Collapse
|
20
|
Tahir MN, Ragg R, Natalio F, Sahoo JK, Daniel P, Koynov K, Strand D, Strand S, Tremel W. Amine functionalized ZrO2 nanoparticles as biocompatible and luminescent probes for ligand specific cellular imaging. J Mater Chem B 2015; 3:2371-2377. [DOI: 10.1039/c4tb01959h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface functionalized ZrO2 nanoparticles show strong photoluminescence and are a versatile tool for cellular targeting due to their chemical functionality.
Collapse
Affiliation(s)
- Muhammad Nawaz Tahir
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes Gutenberg-Universität
- 55099 Mainz
- Germany
| | - Ruben Ragg
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes Gutenberg-Universität
- 55099 Mainz
- Germany
| | - Filipe Natalio
- Institut für Chemie
- Naturwissenschaftliche Fakultät II
- Martin-Luther-Universität Halle-Wittenberg
- 06120 Halle
- Germany
| | - Jugal Kishore Sahoo
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes Gutenberg-Universität
- 55099 Mainz
- Germany
| | - Phillip Daniel
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes Gutenberg-Universität
- 55099 Mainz
- Germany
| | - Kaloian Koynov
- Max Planck-Institut für Polymerforschung
- 55128 Mainz
- Germany
| | - Dennis Strand
- I. Medizinische Klinik
- Universitätsmedizin der Johannes Gutenberg-Universität
- 55131 Mainz
- Germany
| | - Susanne Strand
- I. Medizinische Klinik
- Universitätsmedizin der Johannes Gutenberg-Universität
- 55131 Mainz
- Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes Gutenberg-Universität
- 55099 Mainz
- Germany
| |
Collapse
|
21
|
Natalio F, Corrales T, Dietzsch M, Lieberwirth I, Mugnaioli E, Kappl M, Panthöfer M, Kolb U, Butt HJ, Tremel W. Strong stabilization of liquid amorphous calcium carbonate by polymers and proteins. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314094054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
We have studied the effect of bio-inspired polymers and proteins like ovalbumin, lysozyme and silicatein, which are present in the first stage of egg shell formation or in the formation of siliceous spicules of sponges, on the homogeneous formation of the liquid-amorphous calcium carbonate (LACC) precursor, by a combination of complementary methods like in situ WAXS, light scattering, TEM and cryo-TEM. Lysozyme destabilizes the LACC emulsion, whereas ovalbumin extends the lifetime of the emulsified state. We demonstrate that ovalbumin acts as a stabilizer for a polymer-induced liquid precursor (PILP) process. We propose that the liquid amorphous calcium carbonate is affected by polymers by depletion stabilization and de-emulsification rather than induced by acidic proteins and polymers during a polymer-induced liquid precursor process. Thus, the original PILP coating effect appears to be a result of a de-emulsification process of a stabilized LACC phase. Silicatein-α is responsible for the biomineralization of silica in sponges guides the self-assembly of calcite "spicules" similar to the spicules of the calcareous sponge Sycon. The self-assembled spicules, 10-300 µm in length and 5-10 µm in diameter, are composed of aligned calcite nanocrystals. The spicules are initially amorphous but transform into calcite within months, exhibiting unusual growth along [100]. While natural spicules evidence brittle failure, the synthetic spicules show an elastic response which greatly enhances bending strength. Later stages of nucleation have been studied by "trapping" nuclei from solution by shock-freezing of droplets in liquid ethane (cryo-TEM). This yields snapshots of the structure formation process at given point. In a first step the full determination of the structure of vaterite, one of the common CaCO3 polymorphs, was solved on nanometer-sized crystallites by electron crystallography. These results demonstrate that crystals that are too small for single-crystal X-ray diffraction and too difficult to solve by powder diffraction may nevertheless be amenable to accurate structure determination by electron crystallography.
Collapse
|
22
|
Ragg R, Natalio F, Tahir MN, Janssen H, Kashyap A, Strand D, Strand S, Tremel W. Molybdenum trioxide nanoparticles with intrinsic sulfite oxidase activity. ACS Nano 2014; 8:5182-9. [PMID: 24702461 DOI: 10.1021/nn501235j] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Sulfite oxidase is a mitochondria-located molybdenum-containing enzyme catalyzing the oxidation of sulfite to sulfate in the amino acid and lipid metabolism. Therefore, it plays a major role in detoxification processes, where defects in the enzyme cause a severe infant disease leading to early death with no efficient or cost-effective therapy in sight. Here we report that molybdenum trioxide (MoO3) nanoparticles display an intrinsic biomimetic sulfite oxidase activity under physiological conditions, and, functionalized with a customized bifunctional ligand containing dopamine as anchor group and triphenylphosphonium ion as targeting agent, they selectively target the mitochondria while being highly dispersible in aqueous solutions. Chemically induced sulfite oxidase knockdown cells treated with MoO3 nanoparticles recovered their sulfite oxidase activity in vitro, which makes MoO3 nanoparticles a potential therapeutic for sulfite oxidase deficiency and opens new avenues for cost-effective therapies for gene-induced deficiencies.
Collapse
Affiliation(s)
- Ruben Ragg
- Institut für Anorganische Chemie und Analytische Chemie, Johannes-Gutenberg-Universität , Duesbergweg 10-14, D-55099 Mainz, Germany
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Sahoo JK, Tahir MN, Shukoor MI, Schladt TD, Natalio F, Mugnaioli E, Kolb U, Tremel W. Rational assembly and dual functionalization of Au@MnO heteroparticles on TiO2nanowires. NEW J CHEM 2014. [DOI: 10.1039/c3nj00989k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Tahir MN, Natalio F, Cambaz MA, Panthöfer M, Branscheid R, Kolb U, Tremel W. Controlled synthesis of linear and branched Au@ZnO hybrid nanocrystals and their photocatalytic properties. Nanoscale 2013; 5:9944-9949. [PMID: 23986102 DOI: 10.1039/c3nr02817h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Colloidal Au@ZnO hybrid nanocrystals with linear and branched shape were synthesized. The number of ZnO domains on the Au seeds can be controlled by the solvent mixture. Imidazole-functionalized Au@ZnO hybrid nanocrystals were soluble in water and exhibited a greatly enhanced photocatalytic activity compared to ZnO nanocrystals. The pristine heterodimeric NPs were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-Vis spectroscopy.
Collapse
Affiliation(s)
- Muhammad Nawaz Tahir
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | | | | | | | | | | | | |
Collapse
|
25
|
André R, Natalio F, Tahir MN, Berger R, Tremel W. Self-cleaning antimicrobial surfaces by bio-enabled growth of SnO2 coatings on glass. Nanoscale 2013; 5:3447-3456. [PMID: 23475228 DOI: 10.1039/c3nr00007a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Conventional vapor-deposition techniques for coatings require sophisticated equipment and/or high-temperature resistant substrates. Therefore bio-inspired techniques for the fabrication of inorganic coatings have been developed in recent years. Inspired by the biology behind the formation of the intricate skeletons of diatoms orchestrated by a class of cationic polyamines (silaffins) we have used surface-bound spermine, a naturally occurring polyamine, to promote the fast deposition of homogeneous, thin and transparent biomimetic SnO2 coatings on glass surfaces. The bio-enabled SnO2 film is highly photoactive, i.e. it generates superoxide radicals (O2˙(-)) upon sunlight exposure resulting in a strong degradation of organic contaminants and a strong antimicrobial activity. Upon illumination the biomimetic SnO2 coating exhibits a switchable amphiphilic behavior, which - in combination with its photoactivity - creates a self-cleaning surface. The intrinsic self-cleaning properties could lead to the development of new protective, antifouling coatings on various substrates.
Collapse
Affiliation(s)
- Rute André
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55099 Mainz, Germany
| | | | | | | | | |
Collapse
|
26
|
Natalio F, Corrales TP, Panthofer M, Schollmeyer D, Lieberwirth I, Muller WEG, Kappl M, Butt HJ, Tremel W. Flexible Minerals: Self-Assembled Calcite Spicules with Extreme Bending Strength. Science 2013; 339:1298-302. [DOI: 10.1126/science.1216260] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
27
|
Hoshyargar F, Sahoo JK, Tahir MN, Yella A, Dietzsch M, Natalio F, Branscheid R, Kolb U, Panthöfer M, Tremel W. Graphene-type sheets of Nb1−xWxS2: synthesis and in situ functionalization. Dalton Trans 2013; 42:5292-7. [DOI: 10.1039/c3dt32294g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
28
|
Natalio F, Kashyap A, Lorenz S, Kerschbaumer H, Dietzsch M, Tahir MN, Duschner H, Strand S, Strand D, Tremel W. Multi-photon imaging of amine-functionalized silica nanoparticles. Nanoscale 2012; 4:4680-4686. [PMID: 22735108 DOI: 10.1039/c2nr30660c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A convenient and simple strategy for preparing water soluble, photoluminescent functionalized silica nanoparticles (M-dots) in the absence of fluorophores or metal doping is demonstrated. These M-dots can be used for bioimaging using one and two-photon microscopy. Because of their high photostability, low toxicity and high biocompatibility compared with Lumidot™ CdSe/ZnS quantum dots, functionalized silica particles are superior alternatives for current bioimaging platforms. Moreover, the presence of a free amine group at the surface of the M-dots allows biomolecule conjugation (e.g. with antibodies, proteins) in a single step for converting these photoluminescent SiO(2) nanoparticles into multifunctional efficient vehicles for theragnostics.
Collapse
Affiliation(s)
- Filipe Natalio
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55099 Mainz, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Nakhjavan B, Tahir MN, Natalio F, Panthöfer M, Gao H, Dietzsch M, Andre R, Gasi T, Ksenofontov V, Branscheid R, Kolb U, Tremel W. Ni@Fe₂O₃ heterodimers: controlled synthesis and magnetically recyclable catalytic application for dehalogenation reactions. Nanoscale 2012; 4:4571-4577. [PMID: 22706341 DOI: 10.1039/c2nr12121b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ni@Fe(2)O(3) heterodimer nanoparticles (NPs) were synthesized by thermal decomposition of organometallic reactants. After functionalization, these Ni@Fe(2)O(3) heterodimers became water soluble. The pristine heterodimeric NPs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Mössbauer spectroscopy and magnetic susceptibility measurements. A special advantage of the heterodimers lies in the fact that nanodomains of different composition can be used as catalysts for the removal of environmentally hazardous halogenated pollutants.
Collapse
Affiliation(s)
- Bahar Nakhjavan
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Natalio F, André R, Hartog AF, Stoll B, Jochum KP, Wever R, Tremel W. Vanadium pentoxide nanoparticles mimic vanadium haloperoxidases and thwart biofilm formation. Nat Nanotechnol 2012; 7:530-5. [PMID: 22751222 DOI: 10.1038/nnano.2012.91] [Citation(s) in RCA: 384] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Accepted: 05/09/2012] [Indexed: 05/19/2023]
Abstract
Marine biofouling--the colonization of small marine microorganisms on surfaces that are directly exposed to seawater, such as ships' hulls--is an expensive problem that is currently without an environmentally compatible solution. Biofouling leads to increased hydrodynamic drag, which, in turn, causes increased fuel consumption and greenhouse gas emissions. Tributyltin-free antifouling coatings and paints based on metal complexes or biocides have been shown to efficiently prevent marine biofouling. However, these materials can damage the environment through metal leaching (for example, of copper and zinc) and bacteria resistance. Here, we show that vanadium pentoxide nanowires act like naturally occurring vanadium haloperoxidases to prevent marine biofouling. In the presence of bromide ions and hydrogen peroxide, the nanowires catalyse the oxidation of bromide ions to hypobromous acid (HOBr). Singlet molecular oxygen ((1)O(2)) is formed and this exerts strong antibacterial activity, which prevents marine biofouling without being toxic to marine biota. Vanadium pentoxide nanowires have the potential to be an alternative approach to conventional anti-biofouling agents.
Collapse
Affiliation(s)
- Filipe Natalio
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg Universität, Duesbergweg 10-14, 55099 Mainz, Germany
| | | | | | | | | | | | | |
Collapse
|
31
|
|
32
|
Shukoor MI, Natalio F, Tahir MN, Barz M, Weber S, Brochhausen C, Zentel R, Schreiber LM, Brieger J, Tremel W. CpG-DNA loaded multifunctional MnO nanoshuttles for TLR9-specific cellular cargo delivery, selective immune-activation and MRI. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16903g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
33
|
Schladt TD, Koll K, Prüfer S, Bauer H, Natalio F, Dumele O, Raidoo R, Weber S, Wolfrum U, Schreiber LM, Radsak MP, Schild H, Tremel W. Multifunctional superparamagnetic MnO@SiO2 core/shell nanoparticles and their application for optical and magnetic resonance imaging. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15320c] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
34
|
Wolf SE, Lieberwirth I, Natalio F, Bardeau JF, Delorme N, Emmerling F, Barrea R, Kappl M, Marin F. Merging models of biomineralisation with concepts of nonclassical crystallisation: is a liquid amorphous precursor involved in the formation of the prismatic layer of the Mediterranean Fan Mussel Pinna nobilis? Faraday Discuss 2012. [DOI: 10.1039/c2fd20045g] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
35
|
Tahir MN, André R, Sahoo JK, Jochum FD, Theato P, Natalio F, Berger R, Branscheid R, Kolb U, Tremel W. Hydrogen peroxide sensors for cellular imaging based on horse radish peroxidase reconstituted on polymer-functionalized TiO₂ nanorods. Nanoscale 2011; 3:3907-3914. [PMID: 21845257 DOI: 10.1039/c1nr10587f] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe the reconstitution of apo-horse radish peroxidase (apo-HRP) onto TiO(2) nanorods functionalized with a multifunctional polymer. After functionalization, the horse radish peroxidase (HRP) functionalized TiO(2) nanorods were well dispersible in aqueous solution, catalytically active and biocompatible, and they could be used to quantify and image H(2)O(2) which is a harmful secondary product of cellular metabolism. The shape, size and structure of TiO(2) nanorods (anatase) were analyzed by transmission electron microscopy (TEM), high resolution TEM (HRTEM), electron diffraction (ED) and X-ray diffraction (XRD). The surface functionalization, HRP reconstitution and catalytic activity were confirmed by UV-Vis, FT-IR, CLSM and atomic force microscopy (AFM). Biocompatibility and cellular internalization of active HRP reconstituted TiO(2) nanorods were confirmed by a classical MTT cytotoxicity assay and confocal laser scanning microscopy (CLSM) imaging, respectively. The intracellular localization allowed H(2)O(2) detection, imaging and quantification in HeLa cells. The polymer functionalized hybrid system creates a complete sensor including a "cell positioning system" in each single particle. The flexible synthetic concept with functionalization by post-polymerization modification allows introduction of various dyes for sensitisation at different wavelengths and introduction of various anchor groups for anchoring on different particles.
Collapse
Affiliation(s)
- Muhammad Nawaz Tahir
- Institut für Anorganische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Lukic-Bilela L, Perovic-Ottstadt S, Walenta S, Natalio F, Plese B, Link T, Müller WEG. ATP distribution and localization of mitochondria in Suberites domuncula (Olivi 1792) tissue. ACTA ACUST UNITED AC 2011; 214:1748-53. [PMID: 21525322 DOI: 10.1242/jeb.053439] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The metabolic energy state of sponge tissue in vivo is largely unknown. Quantitative bioluminescence-based imaging was used to analyze the ATP distribution of Suberites domuncula (Olivi 1792) tissue, in relation to differences between the cortex and the medulla. This method provides a quantitative picture of the ATP distribution closely reflecting the in vivo situation. The obtained data suggest that the highest ATP content occurs around channels in the sponge medulla. HPLC reverse-phase C-18, used for measurement of ATP content, established a value of 1.62 μmol ATP g⁻¹ dry mass in sponge medulla, as opposed to 0.04 μmol ATP g⁻¹ dry mass in the cortex, thus indicating a specific and defined energy distribution. These results correlate with the mitochondria localization, determined using primary antibodies against cytochrome oxidase c subunit 1 (COX1) (immunostaining), as well as with the distribution of arginine kinase (AK), essential for cellular energy metabolism (in situ hybridization with AK from S. domuncula; SDAK), in sponge sections. The highest energy consumption seemed to occur in choanocytes, the cells that drive the water through the channel system of the sponge body. Taken together, these results showed that the majority of energetic metabolism in S. domuncula occurs in the medulla, in the proximity of aqueous channels.
Collapse
Affiliation(s)
- Lada Lukic-Bilela
- Laboratory for Molecular Genetics of Natural Resources, Institute for Genetic Engineering and Biotechnology, Gajev Trg 4, 71000 Sarajevo, Bosnia and Herzegovina.
| | | | | | | | | | | | | |
Collapse
|
37
|
Nicolai M, Gonçalves G, Natalio F, Humanes M. Biocatalytic formation of synthetic melanin: the role of vanadium haloperoxidases, L-DOPA and iodide. J Inorg Biochem 2011; 105:887-93. [PMID: 21507323 DOI: 10.1016/j.jinorgbio.2011.03.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2010] [Revised: 03/21/2011] [Accepted: 03/21/2011] [Indexed: 11/17/2022]
Abstract
The vanadium haloperoxidase (V-HPO) enzyme, extracted from the brown alga Laminaria saccharina, is able to catalyze the formation of a black precipitate, using as precursor the amino acid L-dopa in the presence of hydrogen peroxide and iodide, in one-pot synthesis. The L-dopa oxidation is a multistep reaction with a crucial role played by the iodide in the enzyme catalyzed peroxidative production of dopachrome, a well known intermediate in the synthesis of melanin. Dopachrome is then converted to a synthetic form of melanin through a polymerization reaction. Factors, such as buffer composition and pH, influence significantly the reaction first steps, but further steps of melanin production are hardly influenced. The biosynthetic melanin produced through the combination V-HPO/I/H(2)O(2), was characterized by several spectroscopic techniques (UV-vis and FT-IR) as well as XRD. Moreover, this biopolymer is light sensitive, decomposing into oligo- and monomeric units. Scanning electron microscopy (SEM) imaging showed different morphologies when compared with commercial available melanin. The biosynthetic production of melanin can have a wide range of applications from photosensitive cells to biomedicine with the advantage of being produced under eco-friendly and mild conditions.
Collapse
Affiliation(s)
- Marisa Nicolai
- Centro de Química e Bioquímica do Departamento de Química e Bioquímica da Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Lisboa, Portugal
| | | | | | | |
Collapse
|
38
|
Nakhjavan B, Tahir MN, Natalio F, Gao H, Schneider K, Schladt T, Ament I, Branscheid R, Weber S, Kolb U, Sönnichsen C, Schreiber LM, Tremel W. Phase separated Cu@Fe3O4 heterodimer nanoparticles from organometallic reactants. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10922g] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
39
|
Natalio F, André R, Pihan SA, Humanes M, Wever R, Tremel W. V2O5 nanowires with an intrinsic iodination activity leading to the formation of self-assembled melanin-like biopolymers. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11811k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
|
41
|
Natalio F, Link T, Müller WE, Schröder HC, Cui FZ, Wang X, Wiens M. Bioengineering of the silica-polymerizing enzyme silicatein-alpha for a targeted application to hydroxyapatite. Acta Biomater 2010; 6:3720-8. [PMID: 20226280 DOI: 10.1016/j.actbio.2010.03.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Revised: 02/18/2010] [Accepted: 03/03/2010] [Indexed: 10/19/2022]
Abstract
Since its discovery, numerous biotechnological approaches have aimed to explore the silica-polymerizing catalytic activity of the enzyme silicatein. In vivo, silicatein catalyzes polymerization of amorphous silica nanospheres from soluble precursors. In vitro, it directs the formation of nanostructured biosilica. This is of interest for various applications that strive to benefit from both the advantages of the biological system (i.e., silica synthesis under physiological conditions) and the cell mineralization-stimulating effect of biosilica. However, so far immobilization of silicatein has been hampered by the complex multistep procedure required. In addition, the chemical surface modifications involved not only restrict the choice of carrier materials but also render application of silicatein to hydroxyapatite (HA) of mineralized tissue impossible. Here we describe the bioengineering of silicatein, adapted for application in the fields of bone regeneration, tissue engineering, and dental care. Inspired by Glu-rich sequences of mammalian proteins that confer binding affinity to HA, a novel protein-tag was developed, the Glu-tag. Following expression of Glu-tagged silicatein, the HA-binding capacity of the enzyme is demonstrated in combination with synthetic and dental HA. Furthermore, immobilized Glu-tagged silicatein catalyzes synthesis of biosilica coatings on both synthetic HA nanofibrils and dental HA. Hence, Glu-tagged silicatein reveals a considerable biomedical potential with regenerative and prophylactic implementations.
Collapse
|
42
|
Schladt TD, Shukoor MI, Schneider K, Tahir MN, Natalio F, Ament I, Becker J, Jochum FD, Weber S, Köhler O, Theato P, Schreiber LM, Sönnichsen C, Schröder HC, Müller WEG, Tremel W. Au@MnO nanoflowers: hybrid nanocomposites for selective dual functionalization and imaging. Angew Chem Int Ed Engl 2010; 49:3976-80. [PMID: 20408148 DOI: 10.1002/anie.200906689] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas D Schladt
- Institut für Anorganische Chemie und Analytische Chemie, Johannes-Gutenberg-Universität, Duesbergweg 10-14, 55099 Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Schladt T, Shukoor M, Schneider K, Tahir M, Natalio F, Ament I, Becker J, Jochum F, Weber S, Köhler O, Theato P, Schreiber L, Sönnichsen C, Schröder H, Müller W, Tremel W. Au@MnO-“Nanoblumen” - Hybrid-Nanokomposite zur selektiven dualen Funktionalisierung und Bildgebung. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906689] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
44
|
Schladt TD, Schneider K, Shukoor MI, Natalio F, Bauer H, Tahir MN, Weber S, Schreiber LM, Schröder HC, Müller WEG, Tremel W. Highly soluble multifunctional MnO nanoparticles for simultaneous optical and MRI imaging and cancer treatment using photodynamic therapy. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01465f] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
45
|
Natalio F, Mugnaioli E, Wiens M, Wang X, Schröder HC, Tahir MN, Tremel W, Kolb U, Müller WEG. Silicatein-mediated incorporation of titanium into spicules from the demosponge Suberites domuncula. Cell Tissue Res 2009; 339:429-36. [DOI: 10.1007/s00441-009-0903-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2009] [Accepted: 10/27/2009] [Indexed: 10/20/2022]
|
46
|
Plese B, Schröder HC, Grebenjuk VA, Wegener G, Brandt D, Natalio F, Müller WE. Strombine dehydrogenase in the demosponge Suberites domuncula: Characterization and kinetic properties of the enzyme crucial for anaerobic metabolism. Comp Biochem Physiol B Biochem Mol Biol 2009; 154:102-7. [DOI: 10.1016/j.cbpb.2009.05.008] [Citation(s) in RCA: 9] [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] [Received: 10/18/2008] [Revised: 05/05/2009] [Accepted: 05/11/2009] [Indexed: 11/24/2022]
|
47
|
Wang XH, Schlossmacher U, Natalio F, Schröder HC, Wolf SE, Tremel W, Müller WEG. Evidence for biogenic processes during formation of ferromanganese crusts from the Pacific Ocean: implications of biologically induced mineralization. Micron 2009; 40:526-35. [PMID: 19443230 DOI: 10.1016/j.micron.2009.04.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Revised: 04/08/2009] [Accepted: 04/10/2009] [Indexed: 11/24/2022]
Abstract
Ferromanganese [Fe/Mn] crusts formed on basaltic seamounts, gain considerable economic importance due to their high content of Co, Ni, Cu, Zn and Pt. The deposits are predominantly found in the Pacific Ocean in depths of over 1000m. They are formed in the mixing layer between the upper oxygen-minimum zone and the lower oxygen-rich bottom zone. At present an almost exclusive abiogenic origin of crust formation is considered. We present evidence that the upper layers of the crusts from the Magellan Seamount cluster are very rich in coccoliths/coccolithophores (calcareous phytoplankton) belonging to different taxa. Rarely intact skeletons of these unicellular algae are found, while most of them are disintegrated into their composing prisms or crystals. Studies on the chemical composition of crust samples by high resolution SEM combined with an electron probe microanalyzer (EPMA) revealed that they are built of distinct stacked piles of individual compartments. In the center of such piles Mn is the dominant element, while the rims of the piles are rich in Fe (mineralization aspect). The compartments contain coccospheres usually at the basal part. Energy dispersive X-ray spectroscopy (EDX) analyses showed that those coccospheres contain, as expected, CaCO3 but also Mn-oxide. Detailed analysis displayed on the surface of the coccolithophores a high level of CaCO3 while the concentration of Mn-oxide is relatively small. With increasing distance from the coccolithophores the concentration of Mn-oxide increases on the expense of residual CaCO3. We conclude that coccoliths/coccolithophores are crucial for the seed/nucleation phase of crust formation (biomineralization aspect). Subsequently, after the biologically induced mineralization phase Mn-oxide deposition proceeds "auto"catalytically.
Collapse
Affiliation(s)
- Xiao-Hong Wang
- National Research Center for Geoanalysis, 26 Baiwanzhuang Dajie, CHN-100037 Beijing, China
| | | | | | | | | | | | | |
Collapse
|
48
|
Mugnaioli E, Natalio F, Schloßmacher U, Wang X, Müller WEG, Kolb U. Crystalline Nanorods as Possible Templates for the Synthesis of Amorphous Biosilica during Spicule Formation in Demospongiae. Chembiochem 2009; 10:683-9. [DOI: 10.1002/cbic.200800623] [Citation(s) in RCA: 21] [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: 11/06/2022]
|
49
|
Shukoor MI, Natalio F, Fischer S, Terekhov M, Schreiber W, Schröder HC, Müller WEG, Tremel W. Functionalized Magnetic Nano-particles for Selective Targeting and Sensing of Cells. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200870146] [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: 11/05/2022]
|
50
|
Shukoor M, Natalio F, Metz N, Glube N, Tahir M, Therese H, Ksenofontov V, Theato P, Langguth P, Boissel JP, Schröder H, Müller W, Tremel W. dsRNA-funktionalisierte γ-Fe2O3-Nanokristalle: ein Instrument zur gezielten Adressierung von Rezeptoren an der Zelloberfläche. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704735] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|