Results 41 to 50 of about 167,504 (265)

Dissociation Constants of Thiolactic Acid

open access: yesZeitschrift für Physikalische Chemie, 1971
The acid dissociation constants of thiolactic acid have been determined potentiometrically and polarographically at three diffrent temperatures, \(pK_{D_1}\)values· have been found to be 3·63, 3·66 and 3·70 and \(pK_{D_2}\) values as 10.24, 10·18 and 10·11 at 20°,30° and 40° respectively.
R. S. Saxena, Singh, Pratap
openaire   +2 more sources

pKa Determination of a Histidine Residue in a Short Peptide Using Raman Spectroscopy

open access: yesMolecules, 2019
Determining the pKa of key functional groups is critical to understanding the pH-dependent behavior of biological proteins and peptide-based biomaterials.
Brett H. Pogostin   +3 more
doaj   +1 more source

Acid Dissociation Constants of the Benzimidazole Unit in the Polybenzimidazole Chain: Configuration Effects

open access: yesMolecules, 2022
The acid dissociation constant of three benzimidazoles, namely 2,2′-bibenzo[d]imidazole, 2,5′-bibenzo[d]imidazole, and 5,5′-bibenzo[d]imidazole, have been investigated by means of density functional theory calculations in gas phase and in aqueous ...
Liudmil Antonov   +2 more
doaj   +1 more source

Stimulator of interferon genes agonist augmented antitumor immunity of osimertinib in Egfr‐mutated lung cancer

open access: yesMolecular Oncology, EarlyView.
Combining osimertinib with the STING agonist ADU‐S100 activates innate and adaptive immunity to overcome the non‐inflamed microenvironment of Egfr‐mutant lung cancer. This combination increases NK and CD8+ T‐cell infiltration, associated with activation of the STING‐IRF3 pathway and local immunogenic cell death.
Jun Nishimura   +19 more
wiley   +1 more source

Dissociation Constants of Hexosephosphoric Acids.

open access: yesExperimental Biology and Medicine, 1927
Hexosediphosphoric acid from yeast and hexosemonophosphoric acid from muscle (lactacidogen) were kindly made available from preparations by Professor Embden. Electrometric titration showed both stronger than pure phosphoric acid in the region of the first and, more conspicuously, in that of the second dissociation constant.
L. Irving, E. Fischer
openaire   +1 more source

Influence of Metal Ion Complexation on the Acid Dissociation of 4'-Carboxybenzo-24-Crown-8 in an Ethanol-Water Mixture [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 1997
A spectrophotometric method was used to determine the acidity constant of 4'-carboxybenzo-24-crown-8 in 52% (w/w) ethanol-water mixture. The acid dissociation constant, Ka, was found to increase in the presence of Na+, K+, Rb+, Cs+ and Tl+ ions.
Ahmad Rouhollahi   +3 more
doaj  

Biostimulant Potential of Acetic Acid Under Drought Stress Is Confounded by pH-Dependent Root Growth Inhibition

open access: yesFrontiers in Plant Science, 2020
Recent reports of acetic acid-induced drought tolerance and avoidance across a diverse range of plant species encourage consideration of this low-cost commodity organic acid as a biostimulant.
Megan M. Allen, Damian J. Allen
doaj   +1 more source

A novel quinazolinone insulin receptor inhibitor and its synergy with an EGFR inhibitor in glucose‐driven glioblastoma

open access: yesMolecular Oncology, EarlyView.
The novel styrylquinazolinone‐based molecule W1B effectively suppresses glioblastoma by inhibiting IGF1R and EGFR. In high‐glucose microenvironments driving tumor resistance, W1B acts synergistically with the EGFR inhibitor dacomitinib. This combination safely blocks compensatory survival signaling in zebrafish xenograft models. Showcasing promising in
Patryk Rurka   +9 more
wiley   +1 more source

Dissociation Constants and Dissociation Velocities of Substituted Pyruvic Acids [PDF]

open access: yesNature, 1950
IT has been shown1 that weak acids are very often reduced polarographically in two steps. The more positive step belongs to the undissociated acid, the more negative to the acid ion. The total height of these two steps remains constant; but their ratio is changed in a characteristic way with the pH of the solution. If we plot this ratio against the pH,
E. G. CLAIR, K. WIESNER
openaire   +1 more source

Determination of the Acid Dissociation Constant of Succinic Acid in Aqueous Solvent using Density Functional Theory and a Continuum Solvation Model

open access: yesChemical Engineering Transactions
Succinic acid is a pivotal bio-based building block whose industrial application and reaction kinetics are fundamentally driven by its acid dissociation constant pKa.
Thuan Thi Dieu Tran   +2 more
doaj   +1 more source

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