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  1. Article ; Online: Rapid wet chemical synthesis of bioactive glass with high yield by probe sonication.

    Shah, Asma Tufail / Zahoor, Mehvish / Muhammad, Nawshad / Kamutzki, Franz / Schmidt, Johannes / Görke, Oliver

    Journal of materials chemistry. B

    2023  Volume 11, Issue 20, Page(s) 4416–4427

    Abstract: Bioactive glasses (BGs) are inorganic biomaterials which possess favourable properties for bone repair and regeneration. The biological properties of the BGs depend on their physical features. This manuscript describes a simple methodology for rapid ... ...

    Abstract Bioactive glasses (BGs) are inorganic biomaterials which possess favourable properties for bone repair and regeneration. The biological properties of the BGs depend on their physical features. This manuscript describes a simple methodology for rapid synthesis of BG nanoparticles (NPs) with tailored physical properties using ultrasonic disruption produced by an ultrasonic probe. The ultrasonic probe generates stable and transient cavitation which increases the mass transfer and accelerates the chemical reaction. This approach is relatively green as it evades the use of the drastic acidic conditions required for hydrolysis. The prepared BG NPs were characterized by Fourier transform infra-red (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), particle size analysis (PSA), nitrogen adsorption/desorption and BET surface area analysis, X-ray photoelectron spectroscopy (XPS), inductively coupled plasma-optical emission spectrometry (ICP-OES), and
    MeSH term(s) Sonication ; Biocompatible Materials/chemistry ; Microscopy, Electron, Transmission ; Nanoparticles/chemistry ; Hot Temperature
    Chemical Substances Biocompatible Materials
    Language English
    Publishing date 2023-05-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2702241-9
    ISSN 2050-7518 ; 2050-750X
    ISSN (online) 2050-7518
    ISSN 2050-750X
    DOI 10.1039/d2tb02385g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Hydrogenation of Carbon Dioxide to Dimethyl Ether on CuO-ZnO/ZSM-5 Catalysts: Comparison of Powder and Electrospun Structures.

    Nejadsalim, Aidin / Godini, Hamid Reza / Ramesh Kumar, Sanjay / Gallucci, Fausto / Kober, Delf / Gurlo, Aleksander / Görke, Oliver

    Materials (Basel, Switzerland)

    2023  Volume 16, Issue 23

    Abstract: The promising direct dimethyl ether (DME) production through ... ...

    Abstract The promising direct dimethyl ether (DME) production through CO
    Language English
    Publishing date 2023-11-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma16237255
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Ceramic Stereolithography of Bioactive Glasses: Influence of Resin Composition on Curing Behavior and Green Body Properties.

    Chen, Qirong / Schmidt, Franziska / Görke, Oliver / Asif, Anila / Weinhold, Joachim / Aghaei, Erfan / Rehman, Ihtesham Ur / Gurlo, Aleksander / Shah, Asma Tufail

    Biomedicines

    2022  Volume 10, Issue 2

    Abstract: Herein we report on the preparation of a bioactive glass (BAG)-based photocurable resin for the additive manufacturing of BAG scaffolds with high filler loadings. The preparation of glass/ceramics resins for stereolithography with high filler loading is ... ...

    Abstract Herein we report on the preparation of a bioactive glass (BAG)-based photocurable resin for the additive manufacturing of BAG scaffolds with high filler loadings. The preparation of glass/ceramics resins for stereolithography with high filler loading is always a challenge, especially for fillers with a high refractive index variance. Various photocurable resin compositions with and without bioactive glass fillers have been investigated to see the influence of bioactive glass on physical properties of the resin and resulting green body. The effect of concentration of monomers, reactive diluent, light absorber (Sudan orange G dye), photoinitiator (PI), non-reactive diluent, and fillers (BAG) on rheology and photocuring behavior of the resin and tomography of the resulting 3D structures have been investigated. The BAG contents affect the rheology of resin and influence the rate of the polymerization reaction. The resin compositions with 55-60% BAG, 10% PEG-200 (diluent), 1% of PI and 0.015% of the dye were found to be suitable compositions for the stereolithographic fabrication. A higher percentage of PI caused over-curing, while a higher amount of dye decreased the cure depth of the resin. The micro-computed tomography (µ-CT) and scanning electron microscopic (SEM) images of the resulting green bodies display a relatively dense glass scaffold without any visible cracks and good interlayer connection and surface finishing. These properties play an important role in the mechanical behavior of 3D scaffolds. This study will be helpful to prepare high density glass/ceramic slurries and optimize their printing properties.
    Language English
    Publishing date 2022-02-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2720867-9
    ISSN 2227-9059
    ISSN 2227-9059
    DOI 10.3390/biomedicines10020395
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Chemical Composition Refining of Bioactive Glass for Better Processing Features, Part I

    Hmood Firas / Goerke Oliver / Schmidt Franziska

    Biomedical Glasses, Vol 4, Iss 1, Pp 82-

    2016  Volume 94

    Abstract: Bioactive glass is an emerging research area for many scientists around the world. A large processing window combined with high bioactivity are anticipated features for such kind of glass. In fact, both features depend upon the glass network connectivity ...

    Abstract Bioactive glass is an emerging research area for many scientists around the world. A large processing window combined with high bioactivity are anticipated features for such kind of glass. In fact, both features depend upon the glass network connectivity (NC). A good bioactive glass has a network that ensures a balance between the processing properties and the bioactivity. This study aims at developing a new chemical composition based on that of ICIE16 bioactive glass. Therefore, new compositions were investigated by introducing boron oxide and magnesium oxide with different molar ratios ranging from 1 to 3 mol% each to the composition of ICIE16; In addition,Na2O was partially replaced by P2O5. Melt-quenching technique was followed to prepare the bioactive glass. So far, the results have shown that the processing window increases with the proposed modifications. BP3 and BM2 bioactive glasses show the maximum processing window of a round 250 K. The relationship between the chemical composition and the processing window as well as the corresponding bioactivity will be hereafter discussed.
    Keywords bioactive glass ; processing window ; ion exchange ; dissolution ; hydroxyapatite ; Clay industries. Ceramics. Glass ; TP785-869 ; Medicine ; R
    Subject code 660
    Language English
    Publishing date 2016-08-01T00:00:00Z
    Publisher Sciendo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: Core-Sheath Pt-CeO

    Nejadsalim, Aidin / Bashiri, Najmeh / Godini, Hamid Reza / Oliveira, Rafael L / Tufail Shah, Asma / Bekheet, Maged F / Thomas, Arne / Schomäcker, Reinhard / Gurlo, Aleksander / Görke, Oliver

    Nanomaterials (Basel, Switzerland)

    2023  Volume 13, Issue 3

    Abstract: One-dimensional (1D) core-sheath nanofibers, platinum (Pt)-loaded ceria ( ... ...

    Abstract One-dimensional (1D) core-sheath nanofibers, platinum (Pt)-loaded ceria (CeO
    Language English
    Publishing date 2023-01-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano13030485
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Efficient full solar spectrum-driven photocatalytic hydrogen production on low bandgap TiO

    Kutorglo, Edith Mawunya / Schwarze, Michael / Nguyen, Anh Dung / Tameu, Simon Djoko / Huseyinova, Shahana / Tasbihi, Minoo / Görke, Oliver / Primbs, Matthias / Šoóš, Miroslav / Schomäcker, Reinhard

    RSC advances

    2023  Volume 13, Issue 34, Page(s) 24038–24052

    Abstract: The development of photocatalysts that can utilize the entire solar spectrum is crucial to achieving efficient solar energy conversion. The utility of the benchmark photocatalyst, ... ...

    Abstract The development of photocatalysts that can utilize the entire solar spectrum is crucial to achieving efficient solar energy conversion. The utility of the benchmark photocatalyst, TiO
    Language English
    Publishing date 2023-08-10
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra04049f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Highly efficient catalytic pyrolysis of polyethylene waste to derive fuel products by novel polyoxometalate/kaolin composites.

    Attique, Saira / Batool, Madeeha / Yaqub, Mustansara / Goerke, Oliver / Gregory, Duncan H / Shah, Asma Tufail

    Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA

    2020  Volume 38, Issue 6, Page(s) 689–695

    Abstract: We report here alumina-substituted Keggin tungstoborate/kaolin clay composite materials (KAB/kaolin) as polyethylene cracking catalysts. KAB/kaolin composites with varying concentrations of KAB (10-50 wt.%) were synthesized by the wet impregnation method ...

    Abstract We report here alumina-substituted Keggin tungstoborate/kaolin clay composite materials (KAB/kaolin) as polyethylene cracking catalysts. KAB/kaolin composites with varying concentrations of KAB (10-50 wt.%) were synthesized by the wet impregnation method and successfully characterized by Fourier-transform infrared spectroscopy, powder X-ray diffraction, thermo-gravimetric analysis and scanning electron microscopy with energy dispersive X-ray spectroscopy analytical techniques. Use of KAB loaded kaolin composites as the catalyst for low-density polyethylene (LDPE) cracking exhibited a higher percentage of polymer conversion (99%), producing 84 wt.% of fuel oil and negligible amount (˂ 1 wt.%) of solid residue while thermal cracking produced ~22 wt.% residue. Furthermore, gas chromatography-mass spectrometry analysis of oil obtained by non-catalytic cracking exhibited a high selectivity to high molecular weight hydrocarbons (C
    MeSH term(s) Catalysis ; Kaolin ; Polyethylene ; Pyrolysis ; Tungsten Compounds
    Chemical Substances Tungsten Compounds ; polyoxometalate I ; Kaolin (24H4NWX5CO) ; Polyethylene (9002-88-4)
    Language English
    Publishing date 2020-02-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 1480483-9
    ISSN 1096-3669 ; 1399-3070 ; 0734-242X
    ISSN (online) 1096-3669 ; 1399-3070
    ISSN 0734-242X
    DOI 10.1177/0734242X19899718
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  8. Article ; Online: In Vitro

    Jung, Ole / Radenkovic, Milena / Stojanović, Sanja / Lindner, Caroline / Batinic, Milijana / Görke, Oliver / Pissarek, Jens / Pröhl, Annica / Najman, Stevo / Barbeck, Mike

    In vivo (Athens, Greece)

    2021  Volume 34, Issue 5, Page(s) 2287–2295

    Abstract: Background/aim: For the treatment of different tissue defects such as jawbone defects, open wound defect, chronic ulcers, dura mater defects and corneal defects, different biomaterials are available. The use of collagen-based materials for these ... ...

    Abstract Background/aim: For the treatment of different tissue defects such as jawbone defects, open wound defect, chronic ulcers, dura mater defects and corneal defects, different biomaterials are available. The use of collagen-based materials for these applications has been significantly increased over the past decades due to its excellent biocompatibility and degradability. However, no transparent collagen-based biomaterial is available until now. Thus, a newly developed transparent collagen membrane (TCM) based on natural derived porcine pericardium, which offers numerous application possibilities, was developed. The present study aimed to analyze the in vitro and in vivo biocompatibility using established methods.
    Materials and methods: The new TCM membrane and a commercially available collagen membrane (CM, Jason membrane, botiss biomaterials GmbH, Zossen, Germany) were tested for its in vitro cytocompatibility. Furthermore, the in vivo biocompatibility was analyzed using sham operations as control group. In vitro, cytocompatibility was tested in accordance with EN ISO 10993-5/-12 regulations and Live-Dead-stainings. In vivo, a subcutaneous implantation model in BALB/c mice was used and explants were prepared for analyses by established histological, immunohistochemical and histomorphometrical methods.
    Results: In vitro, both membranes showed promising cytocompatibility with a slightly better direct cell response in the Live-Dead staining assay for the TCM. In vivo, TCM induced a comparable inflammatory immune response after 10 and 30 days with comparable numbers of M1- and M2-macrophages as also found in the control group without biomaterial insertion.
    Conclusion: The newly transparent collagen membrane is fully biocompatible and is supporting safe clinical application in tissue repair and surgery.
    MeSH term(s) Animals ; Biocompatible Materials ; Collagen ; Germany ; Mice ; Mice, Inbred BALB C ; Swine ; Wound Healing
    Chemical Substances Biocompatible Materials ; Collagen (9007-34-5)
    Language English
    Publishing date 2021-02-25
    Publishing country Greece
    Document type Journal Article
    ZDB-ID 807031-3
    ISSN 1791-7549 ; 0258-851X
    ISSN (online) 1791-7549
    ISSN 0258-851X
    DOI 10.21873/invivo.12040
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2288: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  9. Article ; Online: In Vivo

    Barbeck, Mike / Alkildani, Said / Mandlule, Armando / Radenković, Milena / Najman, Stevo / Stojanović, Sanja / Jung, Ole / Ren, Yanru / Cai, Baoyi / Görke, Oliver / Rimashevskiy, Denis / Schmidt, Franziska

    In vivo (Athens, Greece)

    2022  Volume 36, Issue 5, Page(s) 2149–2165

    Abstract: Background: Bioglass is a highly adoptable bone substitute material which can be combined with so-called therapeutic ions. However, knowledge is poor regarding the influence of therapeutic ions on immune reactions and associated bone healing. Thus, the ... ...

    Abstract Background: Bioglass is a highly adoptable bone substitute material which can be combined with so-called therapeutic ions. However, knowledge is poor regarding the influence of therapeutic ions on immune reactions and associated bone healing. Thus, the aim of this work was to investigate the influence of strontium- and copper-doped bioglass on the induction of M1 and M2 macrophages, as well as vascularization.
    Materials and methods: Two types of alkali glass were produced based on ICIE16 bioglass via the melt-quench method with the addition of 5 wt% copper or strontium (ICIE16-Cu and ICIE16-Sr). Pure ICIE16 and 45S5 bioglass were used as control materials. The ion release and chemical composition of the bioglass were investigated, and an in vivo experiment was subcutaneously performed on Sprague-Dawley rats.
    Results: Scanning electron microscopy revealed significant differences in the surface morphology of the bioglass materials. Energy dispersive X-ray spectroscopy confirmed the efficiency of the doping process by showing the ion-release kinetics. ICIE16-Cu exhibited a higher ion release than ICIE16-Sr. ICIE16-Cu induced low immune cell migration and triggered not only a low number of M1 and M2 macrophages but also of blood vessels. ICIE16-Sr induced higher numbers of M1 macrophages after 30 days. Both bioglass types induced numbers of M2 macrophages comparable with those found in the control groups.
    Conclusion: Bioglass doping with copper and strontium did not significantly influence the foreign body response nor vascularization of the implantation bed in vivo. However, all the studied bioglass materials seemed to be biocompatible.
    MeSH term(s) Animals ; Ceramics ; Copper/pharmacology ; Immunity ; Ions ; Rats ; Rats, Sprague-Dawley ; Strontium/pharmacology
    Chemical Substances Bioglass ; Ions ; Copper (789U1901C5) ; Strontium (YZS2RPE8LE)
    Language English
    Publishing date 2022-09-13
    Publishing country Greece
    Document type Journal Article
    ZDB-ID 807031-3
    ISSN 1791-7549 ; 0258-851X
    ISSN (online) 1791-7549
    ISSN 0258-851X
    DOI 10.21873/invivo.12941
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2288: 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)
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  10. Article ; Online: Fe-POM/attapulgite composite materials: Efficient catalysts for plastic pyrolysis.

    Attique, Saira / Batool, Madeeha / Goerke, Oliver / Abbas, Ghayoor / Saeed, Faraz Ahmad / Din, Muhammad Imran / Jalees, Irfan / Irfan, Ahmad / Gregory, Duncan H / Tufail Shah, Asma

    Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA

    2022  Volume 40, Issue 9, Page(s) 1433–1439

    Abstract: This article describes the catalytic cracking of low-density polyethylene over attapulgite clay and iron substituted tungstophosphate/attapulgite clay (Fe-POM/attapulgite) composite materials to evaluate their suitability and performance for recycling of ...

    Abstract This article describes the catalytic cracking of low-density polyethylene over attapulgite clay and iron substituted tungstophosphate/attapulgite clay (Fe-POM/attapulgite) composite materials to evaluate their suitability and performance for recycling of plastic waste into liquid fuel. The prepared catalysts enhanced the yield of liquid fuel (hydrocarbons) produced in cracking process. A maximum yield of 82% liquid oil fraction with a negligible amount of coke was obtained for 50% Fe-POM/attapulgite composite. Whereas, only 68% liquid oil fractions with a large amount of solid black residue was produced in case of non-catalytic pyrolysis. Moreover, Fe-POM/attapulgite clay composites showed higher selectivity towards lower hydrocarbons (C
    MeSH term(s) Catalysis ; Clay ; Hydrocarbons ; Magnesium Compounds ; Plastics/chemistry ; Polyethylene/chemistry ; Pyrolysis ; Silicon Compounds
    Chemical Substances Hydrocarbons ; Magnesium Compounds ; Plastics ; Silicon Compounds ; Polyethylene (9002-88-4) ; Clay (T1FAD4SS2M) ; attapulgite (U6V729APAM)
    Language English
    Publishing date 2022-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 1480483-9
    ISSN 1096-3669 ; 1399-3070 ; 0734-242X
    ISSN (online) 1096-3669 ; 1399-3070
    ISSN 0734-242X
    DOI 10.1177/0734242X221080084
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