Results 31 to 40 of about 605,693 (302)

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

open access: yesFEBS 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

Oxidation and Reduction of tert-Butylnitrosoacetylene

open access: yesCHIMIA, 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]

open access: yesJournal 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

Study of actinide chemistry in saturated potassium fluoride solution [PDF]

open access: yes, 1969
Study concerning the chemistry of actinides in saturated KF solution included work with neptunium, uranium, and americium. Solubilities, absorption spectra, oxidation-reduction reactions, and solid compounds which can be produced in KF solution were ...
Cohen, D., Thalmayer, C. E.
core   +1 more source

The effect of hydrogen sulphide on ammonium bisulphite when used as an oxygen scavenger in aqueous solutions [PDF]

open access: yes, 2011
Peer ...
Akisanya, Alfred Rotimi   +3 more
core   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS 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   +2 more
wiley   +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

open access: yesMolecules, 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

The role of the enzyme in the succinate-enzyme-fumarate equilibrium [PDF]

open access: yes, 1931
The following is an account of an investigation into the role of the enzyme in the succinate-enzyme-fumarate equilibrium. The method consisted in the comparison of the value of the free energy change in this reaction obtained from oxidation-reduction ...
Borsook, Henry, Schott, Hermann F.
core  

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

Analysis on morphological characteristics and identification of candidate genes during the flowering development of alfalfa

open access: yesFrontiers in Plant Science
Flower development is a crucial and complex process in the reproductive stage of plants, which involves the interaction of multiple endogenous signals and environmental factors.
Fenqi Chen   +8 more
doaj   +1 more source

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