Results 51 to 60 of about 802,596 (333)

Deterministic Partial Differential Equation Model for Dose Calculation in Electron Radiotherapy

, 2009
Treatment with high energy ionizing radiation is one of the main methods in modern cancer therapy that is in clinical use. During the last decades, two main approaches to dose calculation were used, Monte Carlo simulations and semi-empirical models based
B Dubroca, Börgers C, Coulombel J-F, Davison B, Dubroca B, Dubroca B, Gifford K A, Hensel H, Krieger T, Lehmann C, M Frank, Mihalas D, Modest M F, Mott N F, Müller I, R Duclous, Salvat F, Tervo J, Vassiliev O N, Zerby C D   +19 more
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Manufacture and characterization of a Bolus composed of water, bi-distilled glycerin, gelatin and formaldehyde

Brazilian Journal of Radiation Sciences, 2020
In years the bolus is used as human tissue compensator in treatments of superficial tumors using photons and electrons in the radiotherapy. In order to obtain a low cost and noncommercial bolus, it is proposed in this work to find an optimized bolus ...
Carlla da Motta Oliveira, Fábio Fernandes Brüning, Jessé Gevezier Prado Lyra, Susan Yamamoto Zanetti, Melissa Funchal, Tatiane Cristina de Oliveira Fernandes   +5 more
doaj   +1 more source

Dark-field X-ray imaging for the assessment of osteoporosis in human lumbar spine specimens

Frontiers in Physiology, 2023
Background: Dark-field imaging is a novel imaging modality that allows for the assessment of material interfaces by exploiting the wave character of x-ray.
Florian T. Gassert, Theresa Urban, Theresa Urban, Theresa Urban, Alexander Kufner, Manuela Frank, Manuela Frank, Manuela Frank, Georg C. Feuerriegel, Thomas Baum, Marcus R. Makowski, Christian Braun, Daniela Pfeiffer, Daniela Pfeiffer, Benedikt J. Schwaiger, Franz Pfeiffer, Franz Pfeiffer, Franz Pfeiffer, Franz Pfeiffer, Alexandra S. Gersing   +19 more
doaj   +1 more source

Electrical Characterization of SiPM as a Function of Test Frequency and Temperature

, 2012
Silicon Photomultipliers (SiPM) represent a promising alternative to classical photomultipliers, for instance, for the detection of photons in high energy physics and medical physics.
Boschini, M. J., Consolandi, C., Fallica, P. G., Gervasi, M., Grandi, D., Mazzillo, M., Pensotti, S., Rancoita, P. G., Sanfilippo, D., Tacconi, M., Valvo, G.   +10 more
core   +1 more source

Studies of discrete symmetries in decays of positronium atoms [PDF]

, 2018
A positronium - a bound state of electron and positron - is an eigenstate of parity and charge conjugation operators which decays into photons. It is a unique laboratory to study discrete symmetries whose precision is limited, in principle, by the ...
Curceanu, Catalina, Czerwiński, Eryk, Dulski, Kamil, Gajos, Aleksander, Gorgol, Marek, Heczko, Andrzej, Hiesmayr, Beatrix C., Jasińska, Bożena, Kisielewska, Daria, Korcyl, Grzegorz, Korzeniak, Bartłomiej, Kowalski, Paweł, Kozik, Tomasz, Krzemień, Wojciech, Kubicz, Ewelina, Migdał, Wojciech, Mohammed, Muhsin, Moskal, Paweł, Niedźwiecki, Szymon, Pawlik-Niedźwiecka, Monika, Pałka, Marek, Raczyński, Lech, Raj, Juhi, Rudy, Zbigniew, Sharma, Sushil, Shivani, Shivani, Shopa, Roman Y., Silarski, Michał, Skurzok, Magdalena, Wiślicki, Wojciech, Zgardzińska, Bożena, Zieliński, Marcin   +31 more
core   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

A Geant4 based engineering tool for Fresnel lenses

, 2007
Geant4 is a Monte Carlo radiation transport toolkit that is becoming a tool of generalized application in areas such as high-energy physics, nuclear physics, astroparticle physics, or medical physics.
Costa, João, Pimenta, Mário, Tomé, Bernardo   +2 more
core   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source