Results 31 to 40 of about 7,572,002 (293)

The Effectiveness of Teachers' Use of Demonstrations for Enhancing Students' Understanding of and Attitudes to Learning the Oxidation-Reduction Concept

, 2017
Background:In this study we explored whether the use of teachers' demonstrations significantly improves students’ understanding of redox reactions compared with control group counterparts who were not exposed to the demonstrations.Material and methods ...
A. Basheer, M. Hugerat, Naji Kortam, Avi Hofstein   +3 more
semanticscholar   +1 more source

Control of protein function through oxidation and reduction of persulfidated states

Science Advances, 2020
Thioredoxin system–mediated persulfidation of Cys residues controls protein function and protects them from oxidative stress. Irreversible oxidation of Cys residues to sulfinic/sulfonic forms typically impairs protein function.
É. Dóka, T. Ida, M. Dagnell, Y. Abiko, N. C. Luong, N. Balog, T. Takata, B. Espinosa, A. Nishimura, Q. Cheng, Y. Funato, H. Miki, J. Fukuto, J. R. Prigge, E. Schmidt, Elias S. J. Arnér, Y. Kumagai, T. Akaike, P. Nagy   +18 more
semanticscholar   +1 more source

Post-Electrophoretic Identification of Oxidized Proteins

Biological Procedures Online, 2000
The oxidative modification of proteins has been shown to play a major role in a number of human diseases. However, the ability to identify specific proteins that are most susceptible to oxidative modifications is difficult.
Conrad Craig, Talent John, Malakowsky Christina, Gracy Robert   +3 more
doaj   +1 more source

Interaction between Cu and Thiols of Biological and Environmental Importance: Case Study Using Combined Spectrophotometric/Bathocuproine Sulfonate Disodium Salt Hydrate (BCS) Assay

Molecules, 2023
Considering the biological and ecological importance of Cu–thiol interactions and the discrepancies in previous research, this study focuses on Cu interactions with biologically and ecologically relevant thiols: glutathione (GSH), L-cysteine (L-cys), 3 ...
Dora Crmarić, Elvira Bura-Nakić
doaj   +1 more source

A Comparative Study of Cerebral Oxygenation During Exercise in Hemodialysis and Peritoneal Dialysis Patients

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Cognitive impairment and exercise intolerance are common in dialysis patients. Cerebral perfusion and oxygenation play a major role in both cognitive function and exercise execution; HD session per se aggravates cerebral ischemia in this population. This study aimed to compare cerebral oxygenation and perfusion at rest and in mild
Marieta P. Theodorakopoulou, Konstantina Dipla, Danai Faitatzidou, Fotini Iatridi, Areti Georgiou, Artemios Karagiannidis, Erasmia Sampani, Chrysostomos Dimitriadis, Aggelos Koutlas, Andreas Zafeiridis, Pantelis Sarafidis   +10 more
wiley   +1 more source

Oxidation and Reduction of tert-Butylnitrosoacetylene

CHIMIA, 1975
Tert-butylnitrosoacetylene [I] can be oxidized to the corresponding nitroacetylene [II] in spite of the low temperature rearrangement of [I] to the isomeric pivaloylcyanide [III].
Jean-Claude Motte, H.G. Viehe
doaj   +1 more source

دراسة تعیین درجة حرارة حرق بعض الأوانی الفخاریة کأساس علمی لتشخیص مظاهرتلفها ( تل آثارالسمارة – عصرماقبل الأسرات - دراسة حالة ) [PDF]

Journal of General Union of Arab Archaeologists, 2016
Firing temperature degree of some pottery has been determined from Tel al-samara in Dakahlia through their examination and analysis by polarized microscope "PLM", scanning electron microscope SEM,X-ray diffraction XRD and thermal analysis TGA where the ...
Dr.Walid Kamel Ali Elghareb
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Redox transformations of iron at extremely low pH: fundamental and applied aspects

Frontiers in Microbiology, 2012
Many different species of acidophilic prokaryotes, widely distributed within the domains Bacteria and Archaea, can catalyze the dissimilatory oxidation of ferrous iron or reduction of ferric iron, or can do both.
D. Barrie eJohnson, Tadayoshi eKanao, Sabrina eHedrich   +2 more
doaj   +1 more source