Results 91 to 100 of about 1,787,488 (253)

Studies of unicellular microorganisms Saccharomyces cerevisiae by means of positron annihilation lifetime spectroscopy

Nukleonika, 2015
Results of positron annihilation lifetime spectroscopy (PALS) and microscopic studies on simple microorganisms, brewing yeasts, are presented. Lifetime of ortho-positronium (o-Ps) were found to change from 2.4 to 2.9 ns (longer-lived component) for ...
Kubicz Ewelina, Jasińska Bożena, Zgardzińska Bożena, Bednarski Tomasz, Białas Piotr, Czerwiński Eryk, Gajos Aleksander, Gorgol Marek, Kamińska Daria, Kapłon Łukasz, Kochanowski Andrzej, Korcyl Grzegorz, Kowalski Paweł, Kozik Tomasz, Krzemień Wojciech, Niedźwiecki Szymon, Pałka Marek, Raczyński Lech, Rajfur Zenon, Rudy Zbigniew, Rundel Oleksandr, Sharma Neha Gupta, Silarski Michał, Słomski Artur, Strzelecki Adam, Wieczorek Anna, Wiślicki Wojciech, Zieliński Marcin, Moskal Paweł   +28 more
doaj   +1 more source

On the positron annihilation spectroscopy and tensile behavior of COOH-MWCNT/epoxy nanocomposites [PDF]

Journal of Particle Science and Technology
Positron Annihilation Lifetime Spectroscopy (PALS) is sensitive to the material voids/free volume on the atomic scale. For this reason, this method has been used as a unique technology to measure the free volume and structural defects in polymers in ...
Mohammad Koohkan, Ali Akbar Mehmandoost Khajeh-Dad, Hamed Khosravi   +2 more
doaj   +1 more source

Photophysics of Distinguished Defect States in Bi2O2Se Thin Films

Nanophotonics, Volume 15, Issue 17, 11 September 2026.
An experimental comparison of CVD‐grown Bi2O2Se thin film and films prepared by OTG solution method with similar electrical properties reveals the defects mechanisms in Bi2O2Se thin films via OTG solution method, offering defect engineering strategies for high‐power electronics.
Xiaoran Niu, Hao Li, Leyang Dang, Ruoying Pang, Xin Meng, Adeela Nairan, Huarui Sun, Jingkai Qin, Usman Khan, Xiaochuan Xu, Guigen Wang, Feng He   +11 more
wiley   +1 more source

Proton irradiation-induced defects in undoped GaSb studied by positron lifetime spectroscopy and photoluminescence

, 2009
Undoped GaSb was irradiated by 2.6 MeV protons. The irradiation-induced defects were studied by positron lifetime spectroscopy (PLS) and photoluminescence (PL).
Zhao YW, Li H, Wang Z Wuhan Univ Dept Phys Wuhan 430072 Peoples R China. E-mail Address: wangz@whu.edu.cn, Pang JB, Ke JY, Wang Z, Zhou K   +6 more
core  

Using positron annihilation spectroscopy for the control of humidity-sensitive processes in nanoporous MgAl2O4 ceramics

Технологія та конструювання в електронній апаратурі, 2006
Nanoporous spinel‑type MgAl2O4 ceramics sintered at 1100 and 1400 °C, considered as promising materials for humidity sensors, were investigated using positron annihilation lifetime spectroscopy (PALS). It is demonstrated that PALS can be applied to study
H. I. Klym, A. Ingram, I. V. Hadzaman, O. I. Shpotyuk, M. M. Vakiv, O. I. Shpotyuk   +5 more
doaj  

Convenient Preparation of Graphene Oxide from Expandable Graphite and Its Characterization by Positron Annihilation Lifetime Spectroscopy

C, 2019
Graphene oxide (GO) is conveniently prepared from expandable graphite using a simplified Hummers’ method. The product is thoroughly characterized by usual techniques (UV-vis, Fourier-transform infrared (FTIR) and Raman spectroscopies, zeta ...
Guido Panzarasa, Giovanni Consolati, Marco Scavini, Mariangela Longhi, Fiorenza Quasso   +4 more
doaj   +1 more source

Recent Advancements in Drug Delivery Across the Blood–Brain Barrier in Amyotrophic Lateral Sclerosis (ALS)

CNS Neuroscience &Therapeutics, Volume 32, Issue 9, September 2026.
Progressive BBB/BSCB dysfunction is increasingly recognized as both a pathological feature and a therapeutic barrier in ALS. Novel delivery technologies and barrier‐restoration strategies may enhance CNS drug exposure, improve the efficacy of disease‐modifying therapies, and advance ALS treatment. ABSTRACT Background Amyotrophic lateral sclerosis (ALS)
Nitesh Sanghai, Kaitlyn Pierce, Nidhi Sharma, Sasha Leggett, Tara Chand Yadav, Pegah Masrori, Devi Atukorallaya, Senthilnathan Palaniyandi, Paul C. Marcogliese, Geoffrey K. Tranmer   +9 more
wiley   +1 more source

Structures of Surfactant System Studied by Positron Annihilation Lifetime Spectroscopy [PDF]

, 1996
Surfactant system has many applications in industry. Many investigations have been carried out on surfactants using various methods such as small-angle neutron scattering (SANS), small-angle x-ray scattering(SAXS),conductivity freeze-fracture electron ...
Ibrahim, Rosdi
core   +1 more source

Rational design of Ni‐based catalysts for methane dry reforming: Recent advances and future perspectives

FlexMat, Volume 3, Issue 3, Page 428-451, September 2026.
Addressing the challenges inherent in dry reforming of methane (DRM), this paper focuses on the structural design and performance optimization of Ni‐based catalysts. The modulation strategies for DRM are systematically reviewed across four dimensions: the micromorphology of active metals, metal‐support interactions, electronic modifications by ...
Bowei Cao, Junlei Zhang, Wanglei Wang
wiley   +1 more source

Influence of the filler content on the free nanohole volume in epoxy-based composites

eXPRESS Polymer Letters, 2013
A study on free nanohole volumes in particulate epoxy matrix composites as a function of the aluminum particles content is presented. Specifically, the influence of the filler content in the epoxy matrix on the nanohole volume is analyzed in terms of the
S. Tognana, W. Salgueiro, A. Somoza, A. J. Marzocca   +3 more
doaj   +1 more source