Results 101 to 110 of about 4,089,756 (336)

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

open access: yesDeep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang   +5 more
wiley   +1 more source

A2A Adenosine Receptor Agonists With Last‐Step Enzymatic 18F‐Labelling Potential (Fluorinase) for Positron Emission Tomography (PET)

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
This study exploits the comparable binding tolerances between the fluorinase enzyme and the A2A adenosine receptor towards the development of novel C‐2 functionalised 5′‐fluorodeoxy‐adenosine (FDA)‐based agonists with enzymatic 18F‐labelling capability for positron emission tomography (PET).
Nicolas Charalambous   +6 more
wiley   +1 more source

Recent Advances in Conjugated Microporous Polymers for Photocatalysis: Mechanism, Synthesis and Applications

open access: yesExploration, EarlyView.
Conjugated microporous polymers (CMPs) have attracted more and more attention as new photocatalysts due to their unique advantages such as high performance, long stability and strong light absorption. This review summarizes the application of CMPs as a photocatalyst in recent years and introduces the catalytic mechanism.
Dun Zhou   +5 more
wiley   +1 more source

Calculation of the Radionuclide Concentrations in Samples of Condiments by Using Gamma Spectroscopy System

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2017
 The aim of this work  is to evaluate concentrations of  natural and artificial radionuclide  in nine different samples of condiments from local markets.     The concentrations of 238 U , 232 Th ,40k  and 137Cs  were measured by using gamma spectroscopy
Qabas A. J. Yaseen   +2 more
doaj  

Natural radioactivity levels (K, Th and Ra) in some areas of Punjab, India

open access: yesEPJ Web of Conferences, 2012
Radioactivity, natural and man-made, is omnipresent in the earth's crust in different amounts. Natural radioactive materials under certain conditions can reach hazardous radiological levels.
Kumar Sanjeev   +3 more
doaj   +1 more source

Special issue: Natural radioactivity in construction

open access: yesJournal of Environmental Radioactivity, 2017
Kovler, K (reprint author), Technion, Fac Civil & Environm Engn, Haifa, Israel.
Kovler, Konstantin, Schroeyers, Wouter
openaire   +3 more sources

Advanced extracellular vesicle immunotherapy

open access: yesFlexMat, EarlyView.
A diagrammatic depiction of the therapeutic applicability of extracellular vesicles (EVs) in immunotherapy. This review explores the dual roles of tumor‐derived and immune cell‐derived EVs in cancer immunotherapy, discusses recent progress in EV engineering that improve their clinical utility, and evaluates their potential to augment existing ...
Jingjing Zhang   +6 more
wiley   +1 more source

NATURE OF RADIOACTIVE WASTES [PDF]

open access: yes, 1959
The integrated processes of nuclear industry are considered to define the nature of wastes. Processes for recovery and preparation of U and Th fuels produce wastes containing concentrated radioactive materials which present problems of confinement and dispersal.
openaire   +2 more sources

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