Results 51 to 60 of about 115,096 (255)
Protonation constants of hydroxybenzenes in hydrochloric acid [PDF]
Journal of the Serbian Chemical Society, 1999 The absorption spectra of monohydroxybenzene (Fen), 1,3-dihydroxybenzene (Rez), 1,4-dihydroxybenzene (Hi), 1,2,3-trihydroxybenzene (Pg) and 1,3,5-trihydroxybenzene (Fg) in aqueous solutions of hydrochloric acid with different values of the Hammett ...
S. B. TOSIC +2 more
doaj +2 more sources
Influence of Metal Ion Complexation on the Acid Dissociation of 4'-Carboxybenzo-24-Crown-8 in an Ethanol-Water Mixture [PDF]
Iranian 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
Instrumental methods for NaCl analysis in olive brines
Grasas y Aceites, 1991 Aplicability of flame photometric and ion selective (sodium or chloride) methods to determinate NaCI concentration in olive brines in comparison with the official one (Volhard), which uses AgNO3, is studied.
P. García García +2 more
doaj +1 more source
Cherry and fresh market tomatoes: Differences in chemical, morphological, and sensory traits and their implications for consumer acceptance [PDF]
, 2019 The tomato commercial groups cherry and fresh market, mainly classified by fruit size, have clearly segregated markets. We aimed to estimate the variation within and between these groups and to analyze factors that impact consumer acceptance. To this end,
Casals Missio, Joan +4 more
core +2 more sources
FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
wiley +1 more source
NMR Structural Study of the Prototropic Equilibrium in Solution of Schiff Bases as Model Compounds
Molecules, 2013 An NMR titration method has been used to simultaneously measure the acid dissociation constant (pKa) and the intramolecular NHO prototropic constant ΔKNHO on a set of Schiff bases.
David Ortegón-Reyna +6 more
doaj +1 more source
Examining the PM6 semiempirical method for pKa prediction across a wide range of oxyacids [PDF]
, 2009 The pK~a~ estimation ability of the semiempirical PM6 method was evaluated across a broad range of oxyacids and compared to results obtained using the SPARC software program.
Kaya Forest +2 more
core +1 more source
Elaboration of a spontaneous gluten-free sourdough with a mixture of amaranth, buckwheat, and quinoa flours analyzing microbial load, acidity, and pH [PDF]
, 2019 Pseudocereals are gluten-free, nutrient-dense raw materials that are being considered for the production of gluten-free products, especially bread. This study proposes a gluten-free sourdough formula based on equal amounts of amaranth, buckwheat and ...
Carbó Moliner, Rosa +3 more
core +2 more sources
FEBS Letters, EarlyView.In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai +9 more
wiley +1 more source
The Scientific World Journal, 2014 An attempt was made to understand the changes in physicochemical quality (total soluble solids, titratable acidity, ascorbic acid, total sugars, total phenolics, anthocyanin content, and cupric reducing antioxidant capacity assay) and total volatile ...
Rachna Mishra, Abhijit Kar
doaj +1 more source