Nicola Zambelli, Marco Moretti, Marzia Mattei-Roesli, Fabio Bontadina,
1Centro Protezione Chirotteri Ticino, CH-6714 Semione, Switzerland 2Swiss Federal Research Institute WSL, Ecosystem Boundaries Research Unit, Insubric Ecosystems Group, Via Belsoggiorno 22, CH-6500 Bellinzona, Switzerland 3Institute of ...
Tópico(s): Astrophysics and Cosmic Phenomena
2009 - Museum and Institute of Zoology | Acta Chiropterologica
Produção Nacional
Revisado por pares
Victor Alexandre Veit Schmachtenberg, Gustavo Tontini, J. Koch, Guilherme Dalla Lana Semione, V. Drago,
This work describes a novel synthesis for the production of very pure nanocrystalline hexagonal nickel sulfide phase (h-NiS) by the solventless route in air at temperatures of only 190 °C. Only the cubic NiS2 nickel sulfide phase is obtained when the sulfur source reacting with the nickel acetate powder (NiAc) is switched from thiourea (TU) to elemental sulfur (SN). When using both TU and SN sulfur sources, phase mixture of h-NiS, NiS2 and Ni3S4 with less aggregated particles was obtained. Relative concentrations ...
Tópico(s): Advanced Thermoelectric Materials and Devices
2015 - Elsevier BV | Journal of Physics and Chemistry of Solids
Produção Nacional
Revisado por pares
Gustavo Tontini, Guilherme Dalla Lana Semione, Cristian Bernardi, Roberto Binder, José Daniel Biasoli de Mello, V. Drago,
Purpose This paper aims to synthesize nanostructured flower-like molybdenum disulphide (MoS 2 ) particles and evaluate their suitability to act as additives for lubricants. Design/methodology/approach A hydrothermal method without any surfactant successfully produced 250 nm mean diameter Nanostructured flower-like MoS 2 particles. The resulting product was then solvothermally treated with absolute ethanol producing lipophilic powder particles which after being dispersed in two different lubricants ...
Tópico(s): Adhesion, Friction, and Surface Interactions
2016 - Emerald Publishing Limited | Industrial Lubrication and Tribology
Michael Wagstaffe, Lukas Wenthaus, Adrián Domínguez-Castro, Simon Chung, Guilherme Dalla Lana Semione, Steffen Palutke, Giuseppe Mercurio, Siarhei Dziarzhytski, H. Redlin, N. Klemke, Yudong Yang, Thomas Frauenheim, Adriel Domínguez, Franz X. Kärtner, Ángel Rubio, W. Würth, Andreas Stierle, Heshmat Noei,
Femtosecond X-ray laser pulses synchronized with an optical laser were employed to investigate the reaction dynamics of the photooxidation of CO on the anatase TiO2(101) surface in real time. Our time-resolved soft X-ray photoemission spectroscopy results provide evidence of ultrafast timescales and, coupled with theoretical calculations, clarify the mechanism of oxygen activation that is crucial to unraveling the underlying processes for a range of photocatalytic reactions relevant to air purification ...
Tópico(s): Laser Material Processing Techniques
2020 - American Chemical Society | ACS Catalysis
Marc Wenskat, Jakub Čı́žek, Maciej Oskar Liedke, Maik Butterling, Martin Stiehl, Guilherme Dalla Lana Semione, Constanze Backes, Christopher Bate, Oksana Melikhova, Eric Hirschmann, A. Wagner, H. Weise, Andreas Stierle, Martin Aeschlimann, W. Hillert,
In recent years, superconducting radio-frequency (SRF) cavities have been considered as candidates for qubits in quantum computing, showing longer photon lifetimes and, therefore, longer decoherence times of a cavity stored qubit compared to many other realizations. In modern particle accelerators, SRF cavities are the workhorse. Continuous research and development efforts are being undertaken to improve their properties, i.e., to increase the accelerating field and lower the surface resistance, ...
Tópico(s): Particle accelerators and beam dynamics
2022 - American Physical Society | Physical review. B./Physical review. B
Produção Nacional
Revisado por pares
Victor Alexandre Veit Schmachtenberg, Gustavo Tontini, Guilherme Dalla Lana Semione, V. Drago,
Nickel sulfides show a great variety of thermodynamic stable phases such as Ni3S2, h-Ni7S6, Ni9S8, h-NiS, r-NiS, Ni3S4 and NiS2. Moreover, the hexagonal h-NiS crystalline phase has been academically studied due to a first-order-paramagnetic-antiferromagnetic, metallic-semiconducting transition, both at 265 K and very sensitive to structural or compositional changes. In addition, nanostructured materials have been studied due to their unique properties with no counterpart from the related bulk material. ...
Tópico(s): Quantum Dots Synthesis And Properties
2018 - Elsevier BV | Journal of Alloys and Compounds
S Szentkuti, Fabio Bontadina, Matteo Spada, Marco Moretti, Nicola Zambelli, Alessio Martinoli, Raphaël Arlettaz,
... Bellinzona, Switzerland 5Centro protezione chirotteri Ticino (CPT), 6714 Semione, Switzerland *These authors contributed equally to this study** ...
Tópico(s): Wildlife Ecology and Conservation
2013 - Inter-Research | Endangered Species Research
Arti Dangwal Pandey, Guilherme Dalla Lana Semione, Alena Prudnikava, Thomas F. Keller, Heshmat Noei, Vedran Vonk, Yegor Tamashevich, E. Elsen, B. Foster, Andreas Stierle,
(100) Oriented niobium (Nb) crystals annealed in the vacuum conditions close to that used in mass production of 1.3 GHz superconducting radio frequency cavities for linear accelerators and treated in nitrogen at a partial pressure of 0.04 mbar at temperatures of 800 and 900 °C have been studied. The surfaces of the nitrogen-treated samples were investigated by means of various surface-sensitive techniques, including grazing-incidence X-ray diffraction, X-ray photoemission spectroscopy, and scanning ...
Tópico(s): Gyrotron and Vacuum Electronics Research
2018 - Springer Science+Business Media | Journal of Materials Science
Marc Wenskat, Christopher Bate, Arti Dangwal Pandey, Arno Jeromin, Thomas F. Keller, Jens Knobloch, Julia Köszegi, Felix Krämer, Oliver Kugeler, Satish Kulkarni, D. Reschke, J. Schaffran, Guilherme Dalla Lana Semione, Sven Sievers, Lea Steder, Andreas Stierle, Nicholas Walker,
Abstract A first series of nitrogen infusion runs of 1.3 GHz single-cell cavities at DESY resulted in an unexpected and severe deterioration observed during the vertical cold test. To investigate the origin of the deterioration, one of the cavities underwent extensive radio-frequency measurements and a temperature- and magnetic field-mapping was performed in collaboration with the Helmholtz-Zentrum Berlin. After combining all results, regions of interests were identified and cut-out of the cavity. ...
Tópico(s): Fusion materials and technologies
2020 - IOP Publishing | Superconductor Science and Technology
Elin Grånäs, Michael Busch, Björn Arndt, Marcus Creutzburg, Guilherme Dalla Lana Semione, Johan Gustafson, Andreas Schaefer, Vedran Vonk, Henrik Grönbeck, Andreas Stierle,
From the catalytic, semiconducting, and optical properties of zinc oxide (ZnO) numerous potential applications emerge. For the physical and chemical properties of the surface, under-coordinated atoms often play an important role, necessitating systematic studies of their influence. Here we study the vicinal ZnO([Formula: see text]) surface, rich in under-coordinated sites, using a combination of several experimental techniques and density functional theory calculations. We determine the atomic-scale ...
Tópico(s): Electronic and Structural Properties of Oxides
2021 - Nature Portfolio | Communications Chemistry
Produção Nacional
Revisado por pares
Moisés F. Teixeira, Victor Alexandre Veit Schmachtenberg, Gustavo Tontini, Guilherme Dalla Lana Semione, Walter Lindolfo Weingaertner, V. Drago,
Laser surface alloying (LSA) is a surface treatment technique. It involves the near surface melting by a powerful laser beam with a pre-deposited or concomitantly added alloying element along with a part of the underlying substrate to form a surface alloyed zone. In this paper, it is reported the treatment by laser surface alloying of a cold work steel ASTM A681 substrate simultaneously fed with a powder mixture of 86 wt.% WC + 8 wt.% Cr + 6 wt.% Co. It was carried out using a continuous wave λ = 1064 ...
Tópico(s): Laser Material Processing Techniques
2016 - Elsevier BV | Journal of Materials Research and Technology
Guilherme Dalla Lana Semione, Arti Dangwal Pandey, Steffen Tober, Johannes Pfrommer, A. Poulain, Jakub Drnec, Gisela Schütz, Thomas F. Keller, Heshmat Noei, Vedran Vonk, B. Foster, Andreas Stierle,
A detailed study of the near-surface structure and composition of Nb, the material of choice for superconducting radio-frequency accelerator (SRF) cavities, is of great importance in order to understand the effects of different treatments applied during cavity production. By means of surface-sensitive techniques such as grazing incidence diffuse x-ray scattering, x-ray reflectivity, and x-ray photoelectron spectroscopy, single-crystalline Nb(100) samples were investigated in and ex situ during annealing ...
Tópico(s): Gyrotron and Vacuum Electronics Research
2019 - American Physical Society | Physical Review Accelerators and Beams
Robert Gleißner, Heshmat Noei, Simon Chung, Guilherme Dalla Lana Semione, E. Beck, Ann‐Christin Dippel, Olof Gutowski, Gökhan Gizer, Vedran Vonk, Andreas Stierle,
We investigated the orientation and morphology of Cu nanoparticles grown under ultrahigh-vacuum conditions on ZnO(0001), ZnO(0001̅), and ZnO(101̅4) single crystal surfaces by scanning tunneling microscopy, high-energy grazing incidence X-ray diffraction, low-energy electron diffraction, and scanning electron microscopy. The (111) oriented Cu NPs on basal ZnO showed only small area fractions of high indexed Cu(225) and Cu(331) facets. Cu NPs grown on ZnO(101̅4) show alignment of Cu [111] with the ZnO [ ...
Tópico(s): nanoparticles nucleation surface interactions
2021 - American Chemical Society | The Journal of Physical Chemistry C
Produção Nacional
Revisado por pares
Guilherme Dalla Lana Semione, Victor Alexandre Veit Schmachtenberg, Gustavo Tontini, V. Drago,
Tópico(s): Copper-based nanomaterials and applications
2016 - Elsevier BV | Ceramics International
Produção Nacional
Revisado por pares
Leonardo de Barros Oliveira, Fernando Hakim, Gabriel Semione, Raphael Bertani, Sávio Batista, Lucca B. Palavani, Marcelo Porto Sousa, Diego F. Gómez-Amarillo, Isabella Mejía-Michelsen, Fernando Campos Gomes Pinto, Nícollas Nunes Rabelo, Leonardo C. Welling, Eberval Gadelha Figueiredo,
Ventriculoperitoneal shunt (VPS) is usually the primary choice for cerebrospinal fluid shunting for most neurosurgeons, while ventriculoatrial shunt (VAS) is a second-line procedure because of historical complications. Remarkably, there is no robust evidence claiming the superiority of VPS over VAS. Thus, we aimed to compare both procedures through a meta-analysis.Following Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines, the authors systematically searched the literature ...
Tópico(s): Traumatic Brain Injury and Neurovascular Disturbances
2023 - Lippincott Williams & Wilkins | Neurosurgery
Guilherme Dalla Lana Semione, Vedran Vonk, Arti Dangwal Pandey, Elin Grånäs, Björn Arndt, Marc Wenskat, W. Hillert, Heshmat Noei, Andreas Stierle,
Abstract Niobium’s superconducting properties are affected by the presence and precipitation of impurities in the near-surface region. A systematic wide-temperature range x-ray diffraction study is presented addressing the effect of low temperatures (108 K–130 K) and annealing treatments (523 K in nitrogen atmosphere, 400 K in UHV) on the near-surface region of a hydrogen-loaded Nb(100) single-crystal. Under these conditions, the response of the natural surface oxides (Nb 2 O 5 , NbO 2 , and NbO) and the ...
Tópico(s): Superconducting Materials and Applications
2021 - IOP Publishing | Journal of Physics Condensed Matter
Robert Gleißner, Simon Chung, Guilherme Dalla Lana Semione, Leon Jacobse, Michael Wagstaffe, Steffen Tober, Ariane Neumann, Gökhan Gizer, Christopher M. Goodwin, Markus Soldemo, Mikhail Shipilin, Patrick Lömker, Christoph Schlueter, Olof Gutowski, Matthias Muntwiler, Peter Amann, Heshmat Noei, Vedran Vonk, Andreas Stierle,
We investigated Cu nanoparticles (NPs) on vicinal and basal ZnO supports to obtain an atomistic picture of the catalyst's structure under in situ oxidizing and reducing conditions. The Cu/ZnO model catalysts were investigated at elevated gas pressures by high energy grazing incidence X-ray diffraction and ambient pressure X-ray photoelectron spectroscopy (AP-XPS). We find that the Cu nanoparticles are fully oxidized to Cu2O under atmospheric conditions at room temperature. As the nanoparticles swell ...
Tópico(s): Catalysts for Methane Reforming
2023 - American Chemical Society | ACS Applied Nano Materials
Produção Nacional
Revisado por pares
Márcio Yuri Ferreira, Lucas Pari Mitre, Anthony E. Bishay, Sávio Batista, Lucca B. Palavani, Leonardo B. Oliveira, Gabriel Semione, Filipi Fim Andreão, Silvio Porto, Marcelo Porto Sousa, Pedro Borges, Raphael Camerotte, Raphael Bertani, Michael T. Lawton, Eberval Gadelha Figueiredo,
Tópico(s): Meningioma and schwannoma management
2024 - Springer Science+Business Media | Neurosurgical Review
Produção Nacional
Revisado por pares
Márcio Yuri Ferreira, Sávio Batista, Leonardo B. Oliveira, Guilherme Nunes Marques, Henrique Maia, Lucca B. Palavani, Filipi Fim Andreão, Pedro Borges, Gabriel Semione, Marcelo Porto Sousa, Raphael Muszkat Besborodco, Raphael Bertani, Yafell Serulle, Christian Ferreira, David J. Langer,
OBJECTIVE Unruptured middle cerebral artery aneurysm (uMCAA) has traditionally been treated with open surgical clipping (SC). Endovascular treatments (EVTs) were designed to reduce surgical risks in these cases. Nevertheless, despite its potential benefits, many surgeons favor SC for uMCAA. This updated meta-analysis aimed to compare the safety, efficacy, and clinical outcomes of SC and EVT for uMCAA. METHODS The authors searched the Medline, Embase, and Cochrane Library databases according to the ...
Tópico(s): Acute Ischemic Stroke Management
2024 - American Association of Neurological Surgeons | Journal of neurosurgery
Produção Nacional
Revisado por pares
Marcelo Porto Sousa, Christian Fukunaga, Márcio Yuri Ferreira, Gabriel Semione, Pedro Borges, Guilherme Silva, Gabriel Verly, Leonardo B. Oliveira, Sávio Batista, Filipi Fim Andreão, Herika Negri Brito, Raphael Bertani, Pedro Henrique Martins da Cunha,
Tópico(s): Migraine and Headache Studies
2024 - Springer Science+Business Media | Neurosurgical Review
Produção Nacional
Revisado por pares
João Victor Natalino Cardozo dos Santos, Rubens Semione de Souza Gomes, Italo Everton Bezerra Barbosa, Breno de Souza Mota, Samara Cardozo do Nascimento Barboza, Alicia Ribeiro Fonseca, Emmanuele Neuza Moreira de Andrade, Fabrício de Souza Melo, Misaele Silva Maciel, Felipe Chrystian de Figueiredo Lira, Irlane Ferreira França, Jéssica de Almeida, Antônio José Paulo da Silva Rodrigues, Vitória Diniz Bezerra Lucio da Silva, Izabel Cruz da Rocha,
A população indígena expressa uma gama de diversidade, dispersas em todo territorial nacional, trazendo em conjunto questões interculturais, sociais e desafiadoras frente a saúde dessa população. Frente a isso, a seguinte pesquisa tem por Realizar uma busca ativa na literatura sobre as principais atribuições exercidas pelo enfermeiro frente à pratica clínica e assistencial na saúde dos povos indígenas, em conjunto com as possíveis dificuldades apresentadas durante todo o processo. A seguinte pesquisa ...
Tópico(s): Maternal and Neonatal Healthcare
2022 - Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências | Research Society and Development
Produção Nacional
Revisado por pares
Leonardo de Barros Oliveira, Pedro Henrique Cieslak, Márcio Yuri Ferreira, Cassiano K. Fuziki, Italo C. Martins, Gabriel Semione, Guilherme Nunes Marques, Lucca B. Palavani, Sávio Batista, Nícollas Nunes Rabelo, Stefan W. Koester, Raphael Bertani, Leonardo C. Welling, Michael T. Lawton, Eberval Gadelha Figueiredo,
Tópico(s): Intracranial Aneurysms: Treatment and Complications
2024 - Springer Science+Business Media | Neurosurgical Review
Robert Gleißner, E. Beck, Simon Chung, Guilherme Dalla Lana Semione, Nastasia Mukharamova, Gökhan Gizer, Claudio Pistidda, Dru B. Renner, Heshmat Noei, Vedran Vonk, Andreas Stierle,
A proof of concept is shown for the design of a high pressure heterogeneous catalysis reaction cell suitable for surface sensitive x-ray diffraction and x-ray reflectometry over planar samples using high energy synchrotron radiation in combination with mass spectrometry. This design enables measurements in a pressure range from several tens to hundreds of bars for surface investigations under realistic industrial conditions in heterogeneous catalysis or gaseous corrosion studies.
Tópico(s): Nuclear Physics and Applications
2022 - American Institute of Physics | Review of Scientific Instruments
Lucca B. Palavani, Lucas Pari Mitre, Miguel Vieira de Almeida, Luís G. Pinheiro Neto, M. S. Ferreira, Gabriel Semione, Carlos Alexandre Farias, Sávio Batista, Laura Britz Soares, Felipe Pereira, Leonardo de Macêdo Filho, Raphael Bertani, Michael T. Lawton, Eberval Gadelha Figueiredo,
Tópico(s): Intracranial Aneurysms: Treatment and Complications
2025 - Lippincott Williams & Wilkins | Neurosurgery
Produção Nacional
Revisado por pares
Ahmet Günkan, Márcio Yuri Ferreira, Marina Vilardo, Luca Scarcia, Jhon E. Bocanegra‐Becerra, Leonardo Januário Campos Cardoso, Luis Paleare, Gustavo de Oliveira Almeida, Gabriel Semione, Christian Ferreira, Gabriele Cicciò, Adnan Mujanović, Pascal Jabbour, Yafell Serulle, Thanh N. Nguyen, Jean‐Claude Baron,
Tópico(s): Stroke Rehabilitation and Recovery
2025 - Lippincott Williams & Wilkins | Stroke
Produção Nacional
Revisado por pares
Anderson Corin, Gabriel Semione, Inês Leal, Lídia Cheidde, Kayque Lucas Santana dos Santos, Larissa F. Almeida, Matheus M. Pereira,
Tópico(s): Tea Polyphenols and Effects
2025 - Lippincott Williams & Wilkins | Neurology
Produção Nacional
Revisado por pares
Gabriel Semione, Gustavo de Oliveira Almeida, Henrique L. Lepine, Pedro G L B Borges, Anna Laura Lima Larcipretti, Márcio Yuri Ferreira, Lucca B. Palavani, Michael A. Belfort, Leonardo de Barros Oliveira, Filipi Fim Andreão, Gabriel Felipe Baldissera, Jhon E. Bocanegra‐Becerra, Maria Fernanda P Santana, Raphael Bertani, Michael T. Lawton, Eberval Gadelha Figueiredo,
Tópico(s): Meningioma and schwannoma management
2025 - Elsevier BV | World Neurosurgery
Produção Nacional
Revisado por pares
Jhon E. Bocanegra‐Becerra, Daniel Ballesteros‐Herrera, Khaled Alhwaishel, Marcio Yuri Ferreira, Vanessa Emanuelle Cunha Santos, Cristian D. Mendieta, Gabriel Semione, Kristien Wouters, Sávio Batista, José E. Chang, Lucca B. Palavani, Miguel Angel López-González,
Tópico(s): Digital Imaging in Medicine
2025 - Thieme Medical Publishers (Germany) | Journal of Neurological Surgery Part B Skull Base
Produção Nacional
Revisado por pares
Leonardo de Barros Oliveira, Valentina Ponchio, Gabriel Semione, Raphael Bertani,
Tópico(s): Spinal Dysraphism and Malformations
2025 - Lippincott Williams & Wilkins | Neurosurgery
Produção Nacional
Revisado por pares
Christian Ferreira, Márcio Yuri Ferreira, Lucca B. Palavani, Lucca B. Palavani, Pedro Borges, Ahmet Günkan, G. Müller, Henrique Maia, Gabriel Semione, Sávio Batista, Henrique L. Lepine, D. Zumofen, Katherine Stark, Ricardó A. Hanel, David Gordon, Yafell Serulle, David J. Langer,
Tópico(s): Vascular Malformations Diagnosis and Treatment
2025 - SAGE Publishing | Interventional Neuroradiology