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  1. Article ; Online: Influence of Lanthanum Precursor on the Activity of Nickel Catalysts in the Mixed-Methane Reforming Process.

    Zakrzewski, Mateusz / Shtyka, Oleksandr / Rogowski, Jacek / Ciesielski, Radoslaw / Kedziora, Adam / Maniecki, Tomasz

    International journal of molecular sciences

    2023  Volume 24, Issue 2

    Abstract: This work investigated the influence of the catalytic support precursor on the activity of nickel catalysts 20%Ni/5% ... ...

    Abstract This work investigated the influence of the catalytic support precursor on the activity of nickel catalysts 20%Ni/5%La
    MeSH term(s) Nickel/chemistry ; Lanthanum ; Methane/chemistry ; Chlorine ; Carbon Dioxide/chemistry
    Chemical Substances Nickel (7OV03QG267) ; Lanthanum (6I3K30563S) ; Methane (OP0UW79H66) ; Chlorine (4R7X1O2820) ; Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2023-01-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24020975
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Synthesis, Spectroscopic, Thermal, and Catalytic Properties of Eight New Complexes of Metal(II) Formates or Propionates with Imidazole; Relationship between the Carbon Chain Length and Catalytic Activity.

    Rogalewicz, Bartłomiej / Maniecki, Tomasz / Ciesielski, Radosław / Czylkowska, Agnieszka

    Materials (Basel, Switzerland)

    2021  Volume 15, Issue 1

    Abstract: In one of our previously published articles, we reported the synthesis, spectroscopic, thermal, and catalytic properties of four new M(II) acetate (where M = Co, Ni, Cu, Zn) complexes with imidazole. Presented compounds exhibited activity in the reaction ...

    Abstract In one of our previously published articles, we reported the synthesis, spectroscopic, thermal, and catalytic properties of four new M(II) acetate (where M = Co, Ni, Cu, Zn) complexes with imidazole. Presented compounds exhibited activity in the reaction on catalytic oxidation of styrene. In this study we have synthesized and investigated properties of analogous compounds, however using formates or propionates of mentioned metal cations instead of acetates. Such an approach allowed us to draw valuable conclusions concerning the relationship between the carbon chain length and catalytic activity, which is an important factor for catalyst modeling. Synthesized compounds have been thoroughly investigated using appropriate analytic techniques: AAS (Atomic Absorption Spectrometry), FTIR (Fourier-Transform Infrared Spectroscopy), and TGA (Thermogravimetric Analysis). Catalytic properties have been studied under the same previous conditions, using GC-FID (GC-chromatograph equipped with FID detector).
    Language English
    Publishing date 2021-12-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15010142
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Non-linear Raman scattering intensities in graphene.

    Giegold, Veit / Lange, Lucas / Ciesielski, Richard / Hartschuh, Achim

    Nanoscale

    2020  Volume 12, Issue 9, Page(s) 5612–5617

    Abstract: We show that the Raman scattering signals of the two dominant Raman bands G and 2D of graphene sensitively depend on the laser intensity in opposite ways. High electronic temperatures reached for pulsed laser excitation lead to an asymmetric Fermi-Dirac ... ...

    Abstract We show that the Raman scattering signals of the two dominant Raman bands G and 2D of graphene sensitively depend on the laser intensity in opposite ways. High electronic temperatures reached for pulsed laser excitation lead to an asymmetric Fermi-Dirac distribution at the different optically resonant states contributing to Raman scattering. This results in a partial Pauli blocking of destructively interfering quantum pathways for G band scattering, which is observed as a super-linear increase of the G band intensity with laser power. The 2D band, on the other hand, exhibits sub-linear intensity scaling due to the blocking of constructively interfering contributions. The opposite intensity dependencies of the two bands are found to reduce the observed 2D/G ratio, a key quantity used for characterizing graphene samples, by more than factor two for electronic temperatures around 3000 K.
    Language English
    Publishing date 2020-02-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/c9nr10654e
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  4. Article ; Online: A new sample chamber for hybrid detection of scattering and fluorescence, using synchrotron radiation in the soft x-ray and extreme ultraviolet (EUV) spectral range.

    Ciesielski, Richard / Lohr, Leonhard M / Herrero, Analía Fernández / Fischer, Andreas / Grothe, Alexander / Mentzel, Heiko / Scholze, Frank / Soltwisch, Victor

    The Review of scientific instruments

    2023  Volume 94, Issue 1, Page(s) 13904

    Abstract: Smaller and more complex nanostructures in the semiconductor industry require a constant upgrade of accompanying metrological methods and equipment. A central task for nanometrology is the precise determination of structural features of gratings in the ... ...

    Abstract Smaller and more complex nanostructures in the semiconductor industry require a constant upgrade of accompanying metrological methods and equipment. A central task for nanometrology is the precise determination of structural features of gratings in the nanometer range as well as their elemental composition. Scatterometry and x-ray fluorescence in the soft x-ray and extreme ultraviolet spectral ranges are ideally suited to this task. We here present a new, compact measurement chamber that can simultaneously detect the elastically scattered signal and the fluorescence, originating from nanoscale grating samples. Its geometry enables detecting scattered intensity over a wide angular range with a variable angle of incidence. We show first experiments on industry-relevant test structures from the commissioning process alongside the specifications of the setup, located at PTB's soft x-ray radiometry beamline at the synchrotron radiation facility BESSY II in Berlin.
    Language English
    Publishing date 2023-01-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/5.0120146
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  5. Article: Effect of CaO, Al

    Kaporov, Artem / Shtyka, Oleksandr / Ciesielski, Radoslaw / Kedziora, Adam / Maniukiewicz, Waldemar / Szynkowska-Jozwik, Malgorzata / Madeniyet, Yelubay / Maniecki, Tomasz

    Materials (Basel, Switzerland)

    2023  Volume 16, Issue 8

    Abstract: The investigation of the course of the Boudouard reaction and methane cracking was performed over nickel catalysts based on oxides of calcium, aluminum, and magnesium. The catalytic samples were synthesized by the impregnation method. The physicochemical ...

    Abstract The investigation of the course of the Boudouard reaction and methane cracking was performed over nickel catalysts based on oxides of calcium, aluminum, and magnesium. The catalytic samples were synthesized by the impregnation method. The physicochemical characteristics of the catalysts were determined using atomic adsorption spectroscopy (AAS), Brunauer-Emmett-Teller method analysis (BET), temperature-programmed desorption of ammonia and carbon dioxide (NH
    Language English
    Publishing date 2023-04-18
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma16083180
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  6. Article: Effect of Ruthenium and Cerium Oxide (IV) Promotors on the Removal of Carbon Deposit Formed during the Mixed Methane Reforming Process.

    Zakrzewski, Mateusz / Shtyka, Oleksandr / Ciesielski, Radoslaw / Kedziora, Adam / Maniukiewicz, Waldemar / Arcab, Natalia / Maniecki, Tomasz

    Materials (Basel, Switzerland)

    2021  Volume 14, Issue 24

    Abstract: This work investigates the effect of the addition of Ru and ... ...

    Abstract This work investigates the effect of the addition of Ru and CeO
    Language English
    Publishing date 2021-12-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma14247581
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: The Formation of Cr-Al Spinel under a Reductive Atmosphere.

    Shtyka, Oleksandr / Maniukiewicz, Waldemar / Ciesielski, Radoslaw / Kedziora, Adam / Shatsila, Viktar / Sierański, Tomasz / Maniecki, Tomasz

    Materials (Basel, Switzerland)

    2021  Volume 14, Issue 12

    Abstract: In the present work, for the first time, the possibility of formation of ... ...

    Abstract In the present work, for the first time, the possibility of formation of CrAl
    Language English
    Publishing date 2021-06-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma14123218
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  8. Article ; Online: Controlling photon antibunching from 1D emitters using optical antennas.

    Lange, Lucas / Schäfer, Frank / Biewald, Alexander / Ciesielski, Richard / Hartschuh, Achim

    Nanoscale

    2019  Volume 11, Issue 31, Page(s) 14907–14911

    Abstract: Single-photon emission is a hallmark of atom-like 0D quantum emitters, such as luminescent semiconductor nanocrystals, nitrogen vacancies in diamond and organic dye molecules. In higher dimensional nanostructures, on the other hand, multiple spatially ... ...

    Abstract Single-photon emission is a hallmark of atom-like 0D quantum emitters, such as luminescent semiconductor nanocrystals, nitrogen vacancies in diamond and organic dye molecules. In higher dimensional nanostructures, on the other hand, multiple spatially separated electronic excitations may exist giving rise to more than one emitted photon at a time. We show that optical nanoantennas can be used to control the photon emission statistic of 1D nanostructures and to convert them into single-photon sources. Antenna-control exploits spatially confined near-field enhanced absorption and emission rates resulting in locally increased annihilation of mobile excitons and radiative recombination. As proof of concept, we experimentally demonstrate the improvement of the degree of antibunching in the photoluminescence of single carbon nanotubes using a metal tip at room temperature. Our results indicate that, in addition to improving the performance of single photon sources, optical antennas have the potential to open up a broad range of materials for quantum information technology.
    Language English
    Publishing date 2019-07-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/c9nr03688a
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  9. Article ; Online: A Novel Earbud Detects Aortic Stenosis Murmur Before and After Transcatheter Aortic Valve Replacement.

    Shen, Christine P / Panchal, Jal / Daniel, Misty / Dimalanta, Christina / Engstrom, Hayley / Ciesielski, Robert / Barnacka, Anna / Romero, Steven / Bhavnani, Sanjeev P / Stinis, Curtiss T

    JACC. Case reports

    2023  Volume 28, Page(s) 102089

    Abstract: Noninvasive infrasonic hemodynography using the MindMics earbuds captures low-frequency acoustic vibrations throughout the cardiac cycle. In an n-of-1 analysis, we propose a new method of assessing severe aortic stenosis by using infrasonic ... ...

    Abstract Noninvasive infrasonic hemodynography using the MindMics earbuds captures low-frequency acoustic vibrations throughout the cardiac cycle. In an n-of-1 analysis, we propose a new method of assessing severe aortic stenosis by using infrasonic hemodynography to detect its characteristic systolic ejection murmur before and after transcatheter aortic valve replacement.
    Language English
    Publishing date 2023-11-02
    Publishing country Netherlands
    Document type Case Reports
    ISSN 2666-0849
    ISSN (online) 2666-0849
    DOI 10.1016/j.jaccas.2023.102089
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  10. Article ; Online: Classification of temporomandibular joint erosion, arthritis, and inflammation in patients with juvenile idiopathic arthritis.

    Koos, B / Tzaribachev, N / Bott, S / Ciesielski, R / Godt, A

    Journal of orofacial orthopedics = Fortschritte der Kieferorthopadie : Organ/official journal Deutsche Gesellschaft fur Kieferorthopadie

    2013  Volume 74, Issue 6, Page(s) 506–519

    Abstract: Introduction: Juvenile idiopathic arthritis is the most common disease in pediatric rheumatology. It is characterized by chronically progressive joint destruction. The temporomandibular joints (TMJs) are involved in up to 87% of patients and may take an ...

    Abstract Introduction: Juvenile idiopathic arthritis is the most common disease in pediatric rheumatology. It is characterized by chronically progressive joint destruction. The temporomandibular joints (TMJs) are involved in up to 87% of patients and may take an asymptomatic course in 69% of cases. Other than contrast-enhanced magnetic resonance imaging (MRI), there are no reliable screening symptoms or non-invasive procedures available to diagnose the inflammation in its acute form. The goal of this study was to establish an imaging-based classification system for TMJ erosion via MRI and cone-beam computed tomography (CBCT) in an effort to improve indication-specific treatment approaches and to facilitate the comparison of findings.
    Materials and methods: A total of 46 patients were included. Contrast-enhanced MRI and CBCT images obtained during treatment by pediatric rheumatologists and orthodontists were available from 23 patients with juvenile idiopathic arthritis. We devised a classification system combining the findings of both imaging techniques based on this patient sample in comparison with CBCT findings from an age- and gender-matched group of 23 non-arthritis patients, taking into consideration the available literature and administration of contrast medium.
    Results: Our cohort of 46 patients comprised 60% female and 40% male patients with a mean age of 14 years, providing a total of 92 TMJs for evaluation. We were able to apply the findings efficiently and conveniently to this classification system with no relevant interobserver differences. Mild structural abnormalities were noted in 21% of TMJs in the control group, whereas 83% of TMJs in the arthritis group exhibited severe anomalies, including cases of extreme destruction. Age and gender did not affect the degree of destruction significantly.
    Conclusion: This is the first classification system to link CBCT and MRI with the use of contrast medium. Contrast-enhanced MRI is an internationally recognized technique that permits acute inflammation to be unequivocally diagnosed. Although structural erosion of the TMJs in our arthritis group was generally severe and significant, we were surprised to observe some cases that were clinically asymptomatic.
    MeSH term(s) Adolescent ; Adult ; Algorithms ; Arthritis, Juvenile/classification ; Arthritis, Juvenile/diagnosis ; Child ; Cone-Beam Computed Tomography/methods ; Female ; Humans ; Magnetic Resonance Imaging/methods ; Male ; Observer Variation ; Reproducibility of Results ; Sensitivity and Specificity ; Severity of Illness Index ; Temporomandibular Joint Disorders/classification ; Temporomandibular Joint Disorders/diagnosis ; Young Adult
    Language English
    Publishing date 2013-11-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1309470-1
    ISSN 1615-6714 ; 0015-816X ; 1434-5293
    ISSN (online) 1615-6714
    ISSN 0015-816X ; 1434-5293
    DOI 10.1007/s00056-013-0166-8
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    In stock of ZB MED Cologne/Königswinter

    Ul III Zs.85: Show issues Location:
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    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
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