Results 261 to 270 of about 3,475,040 (327)

Acid Dissociation Constant: A Criterion for Selecting Passivation Agents in Perovskite Solar Cells

, 2021
Although post-treatment has been regarded as one of the effective ways to passivate the underlying defects in perovskite solar cells (PSCs), little attention has been paid to how to select suitable...
Sun-Ho Lee, Seonghwa Jeong, Seongrok Seo, Hyunjung Shin, Chunqing Ma, N. Park   +5 more
semanticscholar   +1 more source

Prenatal Exposure to Per- and Polyfluoroalkyl Substances (PFASs) and Association between the Placental Transfer Efficiencies and Dissociation Constant of Serum Proteins-PFAS Complexes.

Environmental Science and Technology, 2019
Information on placental transfer and adverse outcomes of short-chain per- and polyfluoroalkyl substance (PFASs) is limited, and factors responsible for PFAS placental transfer are still unclear.
Ke Gao, Taifeng Zhuang, Xian Liu, Jianjie Fu, Jingxing Zhang, Jie Fu, Liguo Wang, A. Zhang, Yong Liang, Maoyong Song, G. Jiang   +10 more
semanticscholar   +1 more source

Dissociation constants of thymolphthalexone

Talanta, 1979
For the dissociation constants of thymolphthalexone the following values have been found: pK(3) = 7.03 +/- 0.02, pK(4) = 8.05 +/- 0.09 (by potentiometric titration), pK(5) = 10.83 +/- 0.10, pK(6) = 12.99 +/- 0.11 (by spectrophotometry). They were determined at I = 0.4 and at 25 degrees.
A, Hulanicki, S, Głab
openaire   +2 more sources

Dissociation constants of arsenazo III

Talanta, 1986
Commercial samples of Arsenazo III were found to be appreciably impure even after purification as the barium salt. Chromatography on silica gel followed by crystallization yielded a pure sample of the ethanol solvate of the free acid. The dissociation constants of the acid were determined potentiometrically at 25 degrees and I = 0.1 (NaClO(4)).
I, Nemcová, B, Metal, J, Podlaha
openaire   +2 more sources

Dissociation constants of carboxymethyloxysuccinic acid

Talanta, 1974
The dissociation constants of carboxymethyloxysuccinic acid (CMOS) have been measured at 25 degrees and an ionic strength of 0.1M in sodium perchlorate. The values found were: pK(1) = 2.52, pK(2) = 3.77 and pK(3) = 5.00. CMOS is thus seen to be rather stronger than its isomer citric acid.
C E, Rodriguez, C D, Devine
openaire   +2 more sources

Acid Dissociation Constants of Phenylalkanolamines

Journal of Pharmaceutical Sciences, 1962
The acid dissociation constants of phenylephrine, synephrine, and tyramine were investigated by the new spectrophotometric method of Edsall. Epinephrine was studied by a titration and complexation method. It is concluded from analysis of the spectral data that the phenolic function is a stronger acid than the alkylammonium group.
S, RIEGELMAN, L A, STRAIT, E Z, FISCHER
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Relationships Between some Dissociation Constants

Nature, 1947
IN these Laboratories the fungistatic properties of ethylenic and acetylenic compounds have been studied recently1. Our results indicated that biological activity was connected with the presence of substituents that attract electrons strongly, and led us to a consideration of the dissociation constants of compounds which donate protons (that is, acids ...
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Dissociation constants and structure of ergothioneine

Analytical Biochemistry, 1964
Abstract The structure of ergothioneine was studied from the dependence of ultraviolet spectra on pH and H0. This and the correlation with some model compounds strongly suggests that ergothioneine exists in the form of a dipolar betaine.
B, STANOVNIK, M, TISLER
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Boosting exciton dissociation by regulating dielectric constant in covalent organic framework for photocatalysis

Chem Catalysis, 2022
Guoqing Li, Ping Fu, Qi Yue, Fangpei Ma, Xiaolong Zhao, Shujun Dong, Xin Han, Yu Zhou, Jun Wang   +8 more
semanticscholar   +1 more source

Dissociation constants of organophosphinic acid compounds

Talanta, 1993
The dissociation equilibria of di(2,4,4-trimethylpentyi) phosphinic acid, mono(2,4,4-trimethylpentyl) phosphinic acid, di(n-octyl)phosphinic acid and mono(n-octyl)phosphinic acid have been studied in ethanol-water mixtures by potentiometric titration at 25 degrees C.
M, Martinez, N, Miralles, A, Sastre, E, Bosch   +3 more
openaire   +2 more sources