Results 51 to 60 of about 59,806 (250)

Complexation of 1-Hydroxyethylidene-1,1-Diphosphonic Acid (HEDP) and Manganese(II) in Aqueous Solution [PDF]

Учёные записки Казанского университета: Серия Естественные науки, 2016
Based on pH-potentiometric titration, it was found that the system Mn2+ – HEDP accumulates mono- and binuclear complexes of 1 : 1 and 2 : 2 composition, as well as mononuclear biscomplexes. Equilibrium and stability constants were obtained.
О.V. Bogatyrev, А.F. Yamaltdinova, F.V. Devyatov   +2 more
doaj  

Chemoselective oxidation of aryl organoboron systems enabled by boronic acid-selective phase transfer [PDF]

, 2016
We report the direct chemoselective Brown-type oxidation of aryl organoboron systems containing two oxidizable boron groups. Basic biphasic reaction conditions enable selective formation and phase transfer of a boronic acid trihydroxyboronate in the ...
Anderson, Niall A., Clohessy, Thomas Aidan, Irving, Craig, Lloyd-Jones, Guy C., Molloy, John J., Watson, Allan J. B.   +5 more
core   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Protolytic equilibria in homogeneous and heterogeneous systems of ketoconazole and its direct spectrophotometric determination in tablets [PDF]

Journal of the Serbian Chemical Society, 2005
The acid-base equilibria of a diprotic, slightly hydrosoluble base ketoconazole were studied in homogeneous and heterogeneous water systems. The determinations were performed at 25 ºC at a constant ionic strength of 0.1M(NaCl).
MIRJANA P. VOJIC, GORDANA V. POPOVIC, DUSAN M. SLADIC, LIDIJA B. PFENDT   +3 more
doaj   +3 more sources

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Review

, 2020
The chalcogen elements oxygen, sulfur, and selenium are essential constituents of side chain functions of natural amino acids. Conversely, no structural and biological function has been discovered so far for the heavier and more metallic tellurium ...
Agh R, Arai K, Baskakov IV, Creighton TE, Dittmer K, Du Vigneaud V, Janeček J, Metanis N, Musiol HJ, Muttenthaler M, Nygard B, O'Donnell ME, Welch M, Yang F   +13 more
core   +1 more source

pH‐mediated activation of the lysosomal arginine sensor SLC38A9

FEBS Letters, EarlyView.
Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley   +1 more source

Startup of a reactive distillation process with a decanter [PDF]

, 2008
The startup of a reactive distillation process for the production of propyl acetate including a decanter is studied. A simulation model is presented which describes the whole startup from a cold and empty state and takes into account the liquid phase ...
Brehelin, Mathias, Forner, Florian, Meyer, Michel, Repke, Jens Uwe, Rouzineau, David   +4 more
core   +3 more sources

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

Tautomeric Equilibria Studies by Mass Spectrometry [PDF]

, 2008
Tautomerism in organic chemistry has been extensively studied in condensed phase by spectrometric methods, mainly by IR and NMR techniques. Mass spectrometry studies start 40 years ago but just recently it has been recognized the importance of the mass ...
Eduardo A. Castro, Jorge J. Furlong, Mercedes M. Schiavonni, Patricia E. Allegretti   +3 more
core   +1 more source