Results 21 to 30 of about 209 (146)

Acid‐Responsive Nanobot‐Integrated Core‐Shell Microneedles Reprogram the Degenerative Annulus Fibrosus Microenvironment Through Epigenetic Suppression of Ferroptosis

open access: yesAdvanced Science, EarlyView.
An acid‐responsive core‐shell microneedle system normalizes the degenerative annulus fibrosus microenvironment by consuming pathological H+, generating O2, and providing NIR‐amplified redox buffering. Mechanistically, it epigenetically suppresses ferroptosis via DNMT3A‐dependent methylation of the ATF3 promoter, relieving ATF3‐mediated repression of ...
Lu Tan   +7 more
wiley   +1 more source

Contraluminal sulfate transport in the proximal tubule of the rat kidney. V. Specificity: phenolphthaleins, sulfonphthaleins, and other sulfo dyes, sulfamoyl-compounds and diphenylamine-2-carboxylates

open access: yes, 1985
In order to evaluate the specificity for the contraluminal sulfate transport system the inhibitory potency of phenol- and sulfonphthaleins, of sulfamoyl-compounds (diuretics) as well as diphenylamine-2-carboxylates (Cl− channel blockers) on the 35SO2−4 ...
Lang, H.   +3 more
core   +1 more source

Bubbles Acting as Micro End‐Effectors for Dexterous Manipulation and Sensing in Aqueous Environment

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Inspired by bubbles, this article proposes a low‐cost method for multifunctional manipulation and sensing using microbubbles in aqueous environments. Bubbles are easily generated in situ, enabling the safe and adaptive handling of microobjects and sensing of microforces and surface textures.
Zichen Xu, Qingsong Xu
wiley   +1 more source

Entdeckung der cyclischen Form des MRT‐pH‐Sensors Z‐OMPD ermöglicht >5% 13C‐Hyperpolarisation durch SABRE

open access: yesAngewandte Chemie, EarlyView.
Mit „c‐OMPD“ entdeckten wir eine bislang unbekannte fünfgliedrige Lactolstruktur, die durch Homoaldolkondensation des zentralen Metaboliten Brenztraubensäure entsteht. Wir zeigen, dass das Cyclisierungsgleichgewicht für die Funktion von OMPD als MRT‐basierte pH‐Sonde von entscheidender Bedeutung ist, und erreichen erstmals eine 13C‐Polarisation von >5 %
Juanita Ferreira   +9 more
wiley   +1 more source

Discovery of the Cyclic Form of MRI pH‐Sensor Z‐OMPD Enables >5% 13C Hyperpolarization by SABRE

open access: yesAngewandte Chemie International Edition, EarlyView.
With “c‐OMPD”, we discovered a previously unknown 5‐membered lactol structure that arises from the homoaldol condensation of the central metabolite pyruvic acid. We demonstrate that the cyclization equilibrium is of crucial importance for OMPD's function as MRI‐based pH sensor and achieve for the first time 13C polarization levels (>5%) by SABRE in the
Juanita Ferreira   +9 more
wiley   +1 more source

Application of Glycerol‐Based Adhesives in the Manufacture of Medium‐Density Particleboards

open access: yesJournal of Applied Polymer Science, EarlyView.
In this study, glycerol‐ and diacid‐based wood adhesives were synthesized and applied to Pinus elliottii wood residues for the manufacture of medium‐density particleboards (MDP). ABSTRACT In this study, glycerol‐ and diacid‐based adhesives were synthesized and applied in the manufacture of medium‐density particleboards (MDP) using pine wood (Pinus ...
André Higo Azevedo Silva   +2 more
wiley   +1 more source

Biobased Sunflower Stalk Matrix for Lipase Stabilization via Physical Adsorption

open access: yesBiotechnology and Applied Biochemistry, EarlyView.
ABSTRACT The search for sustainable, cost‐effective biocatalytic processes has driven efforts to develop low‐cost supports for enzyme immobilization. Lignocellulosic residues have received particular attention due to their abundance, renewability, and structural properties.
Jaci L. Vilanova Neta   +8 more
wiley   +1 more source

Boosting Sodium Storage Activity and Kinetics of Hard Carbon by Remodeling Oxygen Chemistry

open access: yesCarbon Energy, EarlyView.
A surface oxygen remodeling strategy is proposed to finely furnish the pseudographitic structure of hard carbon with rich closed pores and expanded interlayer spacings. Accordingly, the sodiation reactivity and kinetics are greatly reinforced to afford an elevated capacity of 360 mAh g−1 and outstanding rate capability of 225 mAh g−1 at 2 A g−1 ...
Xingling Hu   +12 more
wiley   +1 more source

The Colorimetric Determination of Phenolphthalein

open access: yesJournal of Pharmacy and Pharmacology, 1962
Abstract The conditions governing the intensity and stability of the pink colour given by phenolphthalein in alkaline solution have been examined and a procedure for its colorimetric determination proposed. The results of collaborative trials of this method and of its application to certain pharmaceutical preparations are presented.
J, ALLEN, B, GARTSIDE, C A, JOHNSON
openaire   +2 more sources

Advances in Unraveling the Structure and Sodium‐Ion Storage Behaviors of Hard Carbons: From Basic to Extended Characterization Techniques

open access: yesCarbon Energy, EarlyView.
This review is devoted to introducing the structures and sodium storage mechanisms of hard carbon materials and analyzing the correlated advanced characterization techniques. The advanced characterization techniques are categorized based on the classification of signal sources.
Jiechang Gao   +6 more
wiley   +1 more source

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