Results 11 to 20 of about 36,864 (262)

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

Development of Dynamic Model for Real-Time Monitoring of Ripening Changes of Kimchi during Distribution

Foods, 2020
This study describes the development of a method for predicting the ripening of Kimchi according to temperature to provide information on how the ripening of Kimchi changes during distribution.
Ji-Young Kim, Byeong-Sam Kim, Jong-Hoon Kim, Seung-Il Oh, Junemo Koo   +4 more
doaj   +1 more source

Determination of Acid Dissociation Constants of Some 2-(3H) –Benzoxazolone Derivatives by UV–Vis Spectrophotometry [PDF]

Iranian Journal of Chemistry & Chemical Engineering
The acid dissociation constant values of some 2-(3H)-benzoxazolone derivatives were determined in buffered solutions by using the UV-Vis spectrophotometric method.
Semra Altunterim Erkan, Hayati Celik, Banu Kesanlı   +2 more
doaj   +1 more source

Modeling and Thermodynamic Values of Complex Equilibrium of Cobalt(II) with Diethylenetriaminepentaacetic Acid in Aqueous Solution

Indonesian Journal of Chemistry, 2021
The paper reports the study of the complex formation of cobalt (II) with diethylenetriaminepentaacetic acid (DTPA, H5L) based on spectrophotometric (SF) and potentiometric data (pH).
Ghusoon Faidhi Hameed, Fawzi Yahya Wadday, Nahla Shakir Salman   +2 more
doaj   +1 more source

Acidity Constants of Boronic Acids as Simply as Possible: Experimental, Correlations, and Prediction

Molecules
The wide use of boronic compounds, especially boronic acids and benzoxaboroles, in virtually all fields of chemistry is related to their specific properties. The most important of them are the ability to form cyclic esters with diols and the complexation
Andrzej Sporzyński, Agnieszka Adamczyk-Woźniak, Dorota Zarzeczańska, Jan T. Gozdalik, Paulina Ramotowska, Wiktoria Abramczyk   +5 more
doaj   +1 more source

Determination of Acidity Constant (pKa), Lipophilic Partition (LogP) and Distribution Coefficients (LogD) Values of Some 3-(2-Phenylethyl)-Tetrahydro-2H-1,3,5-Thiadiazine-2-Thione-5-Acetic Acid Derivatives

Cumhuriyet Science Journal
Invasive fungal infections pose a significant threat to human health, emphasizing the urgent need for new and effective antifungal agents. 3,5-Disubstituted-tetrahydro-2H-1,3,5-thiadiazine-2-thione derivatives have shown promising antifungal activity ...
Gürkan Özen, Erhan Palaska, Emirhan Nemutlu   +2 more
doaj   +1 more source

Study of β-Cyclodextrin Effect on Acidity Constant of 2-(2H-Benzo(d)(1,2,3) triazol-2-yl) phenol by Spectrophotometry

E-Journal of Chemistry, 2010
The interaction of solutes with β-cyclodextrin leads to apparent changes in their chemical properties, such as shifts in their absorption spectra and acid-base equilibrium.
Amir H. M. Sarrafi, Elahe Konoz, Negin Ghorashi   +2 more
doaj   +1 more source

Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media [PDF]

Journal of Sciences, Islamic Republic of Iran, 2016
The acidity constants of some synthesized protonated pyrazolo quinazoline compounds were determined potentiometrically at ionic strength of 0.1 M in DMF: water (60:40 v/v) system at different temperatures (298.15 K to 318.15 K).
Sh. Baluja, P. Ramavat, K. Nandha
doaj  

Determination of acid dissociation constants of some hydroxy schiff bases by pH-metric titration. application of the Hammett equation

MATEC Web of Conferences, 2013
Ten compounds hydroxybases Schiff were synthesized from salicylaldehyde and the substituted aniline in the ortho, meta and para methyl groups, chloro and nitro.
Hadjeb R., Bara A., Barkat D.
doaj   +1 more source

The effects of b-cyclodextrin and pH on bifonazole hydrosolubility [PDF]

Journal of the Serbian Chemical Society, 2004
The equlibria of bifonazole in saturated water solution within the pH range 4 to 10 [I = 0.1 mol/dm3 (NaCl); 25 ºC] were studied spectrophotometrically. Based on the equlibrium constants determined in a heterogeneous system, the acidity constant (pKa = 5.
MIRA CAKAR, GORDANA POPOVIC
doaj