Results 51 to 60 of about 205,238 (307)

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

A Study on the Gamma-ray Attenuation Parameters of Some Commercial Salt Samples

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020
The purpose of this study is to calculate self-attenuation correction factors, linear (LAC) /mass attenuation coefficients (MAC), half value layers (HVL) and tenth value layers (TVL) of different brands of commercial salt samples using gamma-ray ...
Canel Eke
doaj   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Gamma spectrometric analysis of lower Danube samples from Romania [PDF]

Nuclear Technology and Radiation Protection
This paper focuses on the natural and anthropogenic radioactivity of sediment samples from key spots located in the Lower Danube area and the Danube Delta region. The idea of the study is to confirm that gamma spectrometry is an efficient method
Pojar Vintila Iulian, Ujeniuc Sorin, Catianis Irina, Alexandrescu Bogdan, Scrieciu Albert M., Vasilca Silvana, Suvaila Rares   +6 more
doaj   +1 more source

Evaluation of radon, radium and gamma radiation at the environmental preservation area of Passaúna river, Brazil

Brazilian Journal of Radiation Sciences, 2021
The objective of this research was to evaluate the levels of natural radiation in the Environmental Protection Area (APA) of the Passaúna River (Campo Largo region) in the state of Paraná, Brazil. Gamma radiation measurements were obtained with the gamma
Aline Cristina Martin, Sergei Anatolyevich Paschuk, Janine Nicolosi Corrêa, Flávia Del Claro, Oderson Antônio de Souza Filho   +4 more
doaj   +1 more source

Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy

Advanced Engineering Materials, EarlyView.
An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
wiley   +1 more source

A generalized mathematical model for efficiency calibration of gamma detectors: Application to practical cases [PDF]

Nuclear Technology and Radiation Protection, 2019
Efficiency calibration, i. e. determination of detection efficiency, εp, is a crucial issue in gamma spectrometry (quantification of gamma spectroscopic measurements) with semiconductor and scintillation detectors. Comparing three possible ways to
Mihaljević Nikola N., Jovanović Slobodan I., Dlabac Aleksandar D.   +2 more
doaj   +1 more source

Interactions between Molten High‐Silicon Electrical Steels and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
This study examines how several molten high‐silicon electrical steels interact with both conventional and recycled MgO–C refractories. For this, various immersion experiments are conducted. In addition to infiltration, a number of mechanisms are identified and explained that control the corrosion of the refractory material.
Lukas Neubert, Matheus Roberto Bellé, Anton Yehorov, Anhelina Mospan, Till M. J. Stadtmüller, Seetharaman Sridhar, Christos G. Aneziris, Olena Volkova   +7 more
wiley   +1 more source

Automated preparation of water samples for low-level gamma spectrometry

Acta Chimica Slovenica, 2016
The analysis of water samples using gamma spectrometry requires the preconcentration of the sample in order to determine the content of low-level radionuclides. An automated evaporator was used for this purpose during the preparation of approximately 250
Marijan Nečemer, Marko Gerbec
doaj   +1 more source

Determination of gamma-hydroxybutyric acid in dried blood spots using a simple GC-MS method with direct 'on spot' derivatization [PDF]

, 2010
The objective of this study was the development of an accurate and sensitive method for the determination of gamma-hydroxybutyric acid (GHB) in dried whole blood samples using a GC-MS method.
Ingels, Ann-Sofie, Lambert, Willy, Stove, Christophe   +2 more
core   +1 more source