Results 261 to 270 of about 6,551,457 (314)

The acidities of ascorbic and sialic acids

Journal of Chemical Education, 1970
This note concerning the pKa's of ascorbic and sialic acids id presented since the compounds are of general interest to organic chemists and carbohydrate chemists as well as biochemists.
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EQUILIBRIUM ACIDITIES OF CARBON ACIDS

Pure and Applied Chemistry, 1977
Abstract
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Acid Catalysis by Heteropoly Acids

ChemInform, 2003
The achievements in the field of acid catalysis by heteropoly acids having different structures HxPW11LO40 (L = ZrIV, TiIV, ThIV), HxZW12O40 (Z = SiIV, PV, BIII, CoIII, GeIV), H21B3W39O132, H6P2W18O62, H6P2W21O71, H6As2W21O69 are reviewed. The data on the acidity of HPAs are generalized. The rules of homogeneous and heterogeneous acid catalysis by HPAs
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Acids: Natural Acids and Acidulants

2003
Acids, or acidulants as they are also called, are commonly used in food processing as flavor intensifiers, preservatives, buffers, meat-curing agents, viscosity modifiers, and leavening agents. This article discusses the functions that acidulants have in food systems and reviews the more commonly used food acidulants.
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Subatmospheric Vapor Pressure Curves for Propionic Acid, Butyric Acid, Isobutyric Acid, Valeric Acid, Isovaleric Acid, Hexanoic Acid, and Heptanoic Acid

Journal of Chemical & Engineering Data, 2004
Vapor pressure data were measured for the following carboxylic acids:  propionic, butyric, isobutyric, valeric, isovaleric, hexanoic, and heptanoic acids. The pressure ranged between ∼5 kPa and atmospheric pressure (at sea level), and the corresponding temperatures were between 85 and 180 °C, depending on the acid being measured.
Scott L. Clifford, Deresh Ramjugernath, J. David Raal   +2 more
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The Second Acidic Constant of Salicylic Acid

Annali di Chimica, 2005
AbstractThe second dissociation constant of salicylic acid (H2L) has been determined, at 25 °C, in NaCl ionic media by UV spectrophotometric measurements. The investigated ionic strength values were 0.16, 0.25, 0.50, 1.0, 2.0 and 3.0 M. The protolysis constants calculated at the different ionic strengths yielded, with the Specific Interaction Theory ...
PORTO R, DE TOMMASO G, FURIA, Emilia
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An acid for an acid

Nature Chemistry, 2023
Xufeng Lin, Alemayehu Gashaw Woldegiorgis   +1 more
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BILE ACIDS AND GASTRIC ACID

The Lancet, 1986
D L, Morris, C S, Ubhi, I D, Ansell
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Alendronic acid/pamidronic acid/zoledronic acid

Reactions Weekly, 2008
  +6 more sources

Proton Acids, Lewis Acids, Hard Acids, Soft Acids and Superacids

1975
Although the terms acid and base have been in use since the early days of chemistry, the meaning of these terms has undergone considerable modification through the centuries and continues even today with the recent introduction of new terms such as hard acid, soft acid and superacid.
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