Higuchi connors
WebCyclodextrins (CDs), a group of oligosaccharides formed by glucose units bound together in a ring, show a promising ability to form complexes with drug molecules and improve their … WebMay 12, 2010 · The stability constants, estimated using the Higuchi–Connors method, were found in the range of 10–100 M −1. Additionally, the p K a values at 25 °C and molar extinction coefficients in aqueous buffered solutions were also determined for all studied compounds. Introduction
Higuchi connors
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WebPhase-solubility studies Water solubility studies for both triterpenic acids were conducted by the Higuchi and Connors method [16] using a series of increasing concentrations of OGCD. In this purpose aqueous suspensions of oleanolic acid and ursolic acid, respectively, were prepared in the presence of OGCD in a concentration range of 1 to 300 ... WebHiguchi, T., Connors, K.A., Phase-solubility techniques, Adv. Anal. Inst., 4, 117–212 (1965) Google Scholar Higuchi, T., Kristiansen, H., J ., Binding specificity between small organic solutes in aqueous solution: Classification of some solutes into two groups according to binding tendencies, Pharm. Sci., 59, 1601–1608 (1970) Google Scholar
WebHiguchi T, Connoras KA. Phase-solubility techniques, ADV Anal Chem Instrum, 1965, 4, 117-210. has been cited by the following article: Article Solid Dispersion Incorporated … WebAug 28, 2024 · The Higuchi-Connors method was used to corroborate it. The Benesi-Hildebrand method fixes ligand concentration (cyclodextrin) to different solutions with variable amounts of the substrate, from one to five mM. The absorbance of the free ligand is measured, and then subtracted from the rest of the solution's absorbances levels (ΔA).
WebNov 7, 2024 · In this work, we have prepared an oral liquid pharmaceutical of HA complexed with HPβCD according phases solubility diagram of Higuchi & Connors. The aim of the study was to develop and validate an analytical method by RP-HPLC for simultaneous determination of HA assay complexed with HPβCD its degradation products and … WebIn vitro transdermal permeation behavior of isosorbide dinitrate in the absence and presence of 2-hydroxypropyl-β-cyclodextrin: solutions and suspensions. Interactions of a …
WebThe CAT content in the supernatant was analyzed using a UV-visible spectrophotometer (UV-2550, Shimadzu, Japan) at 230 nm. All experiments were performed in triplicate. The apparent stability constant (K C) was calculated using Higuchi-Connors equation based on the straight-line part of the phase solubility diagram: (1) K C = s l o p e S 0 × 1 ...
WebT. Higuchi and K. A. Connors, “Phase-Solubility Techniques,” In: C. N. Reilly, Ed., Advances in Analytical Chemistry and Instrumentation, Wiley-Interscience, New York, Vol. 4, 1965, pp. … crystal springs reservoirWebMay 20, 2016 · Here, the key to solubilisation is identified as the formation of inclusion complexes with the drug molecule. If inclusion complexation were the only contribution to drug solubility, it would increase linearly with CD concentration (as per the Higuchi–Connors model); this is because inclusion complexation is a 1 : 1 stoichiometric process. crystal springs reservoir californiaWebOct 27, 2024 · Higuchi & Connors. The aim of the study was to develop and validate an analytical method by RP-HPLC for simultaneous determination of HA assay complexed with HPβCD its degradation products and potassium sorbate as preservative in an oral liquid pharmaceutical preparation. Material and methods Reagents crystal springs reservoir ca water levelWebdiagram of Higuchi & Connors and by a method described by Filipović-Grcić J et al..1 with minor modifications to improve the HA water solubility. This new method improved percentage of inclusion reaching the maximum percentage of inclusion (91.52±0.92%) using by Filipović-Grcić J et al..1 which was 25%. The complex HA/HPβCD was characterized dynaflux r1100v water coolerWebMay 15, 2024 · The Higuchi–Connors method indicated an increase of more than 2300 times in the aqueous solubility of NG by HPβCD, as well as a high CE value and appropriate increase in dosage bulk, suggesting that the NG/HPβCD complex has good potential for use as a solid dosage form. Despite these benefits, the subsequent experiments showed that … crystal springs reservoir water levelcrystal springs reservoir caWebSolubility profiles by Higuchi and Connors theory. So is the drug intrinsic solubility in cyclodextrin absence 76 . Source publication Alternative Technologies to Improve … crystal springs reserve