Results 81 to 90 of about 120,161 (290)

Standardization of 241Am by digital coincidence counting, liquid scintillation counting and defined solid angle counting [PDF]

arXiv, 2010
The nuclide 241Am decays by alpha emission to 237Np. Most of the decays (84.6 %) populate the excited level of 237Np with energy of 59.54 keV. Digital Coincidence Counting was applied to standardize a solution of 241Am by alpha-gamma coincidence counting with efficiency extrapolation.
arxiv  

Purple and red rice (Oryza sativa L.) bran polyphenols show antiobesity and antidiabetic activities

Cereal Chemistry, EarlyView.
Abstract Background and Objectives Rice bran is a source of bioactive polyphenols. This study aimed to characterize the antidiabetic potential of different rice brans (one brown, two red, and two purple) by examining their ability to inhibit α‐amylase, α‐glucosidase, and pancreatic lipase, and to stimulate glucose uptake in adipocytes.
Stephen M. Boue, William Broussard, Abigail Michelz   +2 more
wiley   +1 more source

Datação radiocarbônica de sítios arqueológicos do tipo sambaqui pela técnica de absorção de CO2: uma alternativa à síntese benzênica

Química Nova, 2004
The sambaquis are archaeological sites with remains of pre-historical Brazilian civilizations. They look like small hills containing different kinds of shells, animal and fish bones, small artifacts and even human skeletons.
Mendonça Maria Lúcia T. G., Godoy José Marcus   +1 more
doaj  

A systematic review of electron FLASH dosimetry and beam control mechanisms utilized with modified non-clinical LINACs. [PDF]

J Appl Clin Med Phys
Abstract Background FLASH has been shown to spare normal tissue toxicity while maintaining tumor control. However, existing irradiation platforms and dosimetry are not compatible. Consequently, an abundance of FLASH delivery devices and new dosimetry across all modalities has been created.
DeFrancisco J, Kim S.
europepmc   +2 more sources

CO2‐Based Fischer‐Tropsch Synthesis Toward Aviation Fuel Components Using a Na‐Promoted Fe Catalyst

Chemie Ingenieur Technik, EarlyView.
A Na‐promoted Fe catalyst was investigated to produce liquid hydrocarbons using CO2‐based Fischer‐Tropsch synthesis. As a result of a systematic variation of operation parameters, 49 wt % of the organic liquid was promising as sustainable aviation fuel. Abstract The CO2‐based Fischer‐Tropsch synthesis toward liquid hydrocarbons was investigated using a
Christian Schmidt, Hendrik Wollmerstädt, Sven Kureti   +2 more
wiley   +1 more source

Investigation of liquid distribution in gas–solid fluidized beds for fluid cokers

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Thermal cracking processes convert larger molecules into smaller, more valuable products, without a catalyst, allowing for transforming residual oils or waste plastics into useful compounds. Fluid coking, a thermal cracking process utilizing a fluidized bed of hot particles, processes approximately 1 million barrels of residual oil daily. This
Yohann Cochet, Cedric Briens, Franco Berruti, Jennifer McMillan   +3 more
wiley   +1 more source

Performance of VUV-sensitive MPPC for Liquid Argon Scintillation Light [PDF]

, 2015
A new type of the Multi-Pixel Photon Counter (MPPC), sensitive to Vacuum Ultra-Violet (VUV) light (wavelength {\lambda} < 150 nm), is recently developed and produced by Hamamatsu Photonics K.K. The basic properties of the new MPPC are measured at cryogenic facility of Waseda university using liquid nitrogen. Temperature dependence of breakdown voltage,
arxiv   +1 more source

Solid State Structures of Three Zinc(II) Coordination Polymers with 3‐(1H‐Imidazol‐1‐yl)propanoate Linkers Prepared in Water

European Journal of Inorganic Chemistry, Accepted Article.
Coordination polymers of zinc(II) with three readily accessible 3‐(1H‐imidazol‐1‐yl)propanoate ligands are prepared by combining aqueous solutions of the ligands and zinc(II) salts, resulting in a precipitation of the respective coordination polymers.
Katharina Kodolitsch, Ana Torvisco, Tomas Kamencek, Matjaz Mazaj, Egbert Zojer, Christian Slugovc   +5 more
wiley   +1 more source

Application of Digital Anti-Coincidence Counting Method for Primary Activity Determination of 59Fe

Atom Indonesia, 2019
As a radiopharmaceutical, the use of 59Fe is classified as a high pharmaceutical risk product. Therefore, a standard reference for activity measurement of 59Fe is necessary to ensure its metrological aspect. This paper describes an alternative method for
A. Agusbudiman, K.B. Lee, J.M. Lee
doaj   +1 more source

Metal halide perovskite for room temperature gamma‐ray spectrum detection

Information &Functional Materials, EarlyView.
Integrating recent advancements in metal halide perovskite (MHP) for room temperature gamma‐ray spectroscopy, we provide a comprehensive overview of the methods for growing high‐quality MHP crystals, along with fundamental insights into the structure of gamma‐ray devices and the defect characteristics of MHPs.
Zhongyi Lin, Lei Li, Yang Xu, Deren Yang, Zhenyi Ni   +4 more
wiley   +1 more source