The effects of organic acids on the dissolution of silicate minerals: A case study of oxalate catalysis of kaolinite dissolution

2006 ◽  
Vol 70 (9) ◽  
pp. 2191-2209 ◽  
Author(s):  
Jordi Cama ◽  
Jiwchar Ganor
Keyword(s):  
Organic Acids ◽  
Silicate Minerals

Weathering of silicate minerals by organic acids. I. Nature of cation solubilisation

Geoderma ◽  
1992 ◽  
Vol 53 (1-2) ◽  
pp. 45-63 ◽  
Author(s):  
Aloke K. Barman ◽  
Chandrika Varadachari ◽  
Kunal Ghosh
Keyword(s):  
Organic Acids ◽  
Silicate Minerals

Cryoprotection properties of salts of organic acids: a case study for a tetragonal crystal of HEW lysozyme

2010 ◽  
Vol 66 (7) ◽  
pp. 789-796 ◽  
Author(s):  
Grzegorz Bujacz ◽  
Blanka Wrzesniewska ◽  
Anna Bujacz
Keyword(s):  
Organic Acids ◽  
Great Majority ◽  
Sodium Formate ◽  
Organic Salts ◽  
X Ray Crystallography ◽  
Cryoprotective Agents ◽  
Potassium Tartrate ◽  
Salts Of Organic Acids ◽  
High Concentrations

Currently, the great majority of the data that are used for solving macromolecular structures by X-ray crystallography are collected at cryogenic temperatures. Selection of a suitable cryoprotectant, which ensures crystal stability at low temperatures, is critical for the success of a particular diffraction experiment. The effectiveness of salts of organic acids as potential cryoprotective agents is presented in the following work. Sodium formate, acetate, malonate and citrate were tested, as were sodium potassium tartrate and acetate in the form of potassium and ammonium salts. For each salt investigated, the minimal concentration that was required for successful cryoprotection was determined over the pH range 4.5–9.5. The cryoprotective ability of these organic salts depends upon the number of carboxylic groups; the lowest concentration required for cryoprotection was observed at neutral pH. Case-study experiments conducted using the tetragonal form of hen egg-white lysozyme (HEWL) confirmed that salts of organic acids can successfully act as cryoprotective agents of protein crystals grown from high concentrations of inorganic salts. When crystals are grown from solutions containing a sufficient concentration of organic acid salts no additional cryoprotection is needed as the crystals can safely be frozen directly from the crystallizing buffers.

scholarly journals Liquefying Compounds by Forming Deep Eutectic Solvents: A Case Study for Organic Acids and Alcohols

2020 ◽  
Vol 124 (20) ◽  
pp. 4174-4184 ◽  
Author(s):  
Dinis O. Abranches ◽  
Renato O. Martins ◽  
Liliana P. Silva ◽  
Mónia A. R. Martins ◽  
Simão P. Pinho ◽  
...  
Keyword(s):  
Organic Acids ◽  
Deep Eutectic Solvents

A case study targeting K fertilizer chemical synthesis with complete valorization of extraction by-products as an option

2020 ◽  
Vol 22 (20) ◽  
pp. 6954-6966 ◽  
Author(s):  
Jiangyan Yuan ◽  
Hongwen Ma ◽  
Ruoyu Guo ◽  
Xi Ma ◽  
Sridhar Komarneni
Keyword(s):  
Chemical Synthesis ◽  
Chemical Route ◽  
Silicate Minerals ◽  
K Fertilizer ◽  
By Products ◽  
Maximum Utilization

A green and sustainable chemical route to extract potassium and realize maximum utilization of potassium-rich silicate minerals.

From nature, through chemical synthesis, toward use in agriculture: Oryzoxymycin case study

2009 ◽  
Vol 81 (1) ◽  
pp. 105-112 ◽  
Author(s):  
Regina N. Bwire ◽  
Runner R. Majinda ◽  
Ishmael B. Masesane ◽  
Patrick G. Steel
Keyword(s):  
Amino Acid ◽  
Organic Acids ◽  
Hydrogenation Reaction ◽  
Diels Alder ◽  
Transfer Hydrogenation ◽  
Amino Acid Derivatives ◽  
Oxidation Reactions ◽  
Stereocontrolled Synthesis ◽  
Transfer Hydrogenation Reaction

The Diels-Alder adducts of ethyl (E)-3-nitroacrylate and furan provided a common and versatile template for the stereocontrolled synthesis of an isomer of the natural product oryzoxymycin and polyhydroxylated cyclohexyl β-amino acid derivatives. The strategy for the synthesis of the polyhydroxylated cyclic β-amino acid derivatives involved base-induced fragmentation of the oxanorbornene skeleton and face selective oxidation reactions. A Pd-catalyzed transfer hydrogenation reaction in the presence of organic acids is also described. This reaction is amenable to being enantioselective through use of optical pure chiral organic acids.

Sign in / Sign up

Export Citation Format

Share Document