The Microscopical Identification of Some Sodium and Potassium Salts

1924 ◽  
Vol 13 (2) ◽  
pp. 122-125
Author(s):  
Geo.L. Keenan
Keyword(s):  
Potassium Salts ◽  
Sodium And Potassium

Synthesis of Sulfoquinovose and Sulfoquinovosyl Diacylglycerides, and a Fluorogenic Substrate for Sulfoquinovosidases

2019 ◽  
Author(s):  
Yunyang Zhang ◽  
Janice Mui ◽  
Thimali Arumaperuma ◽  
James P. Lingford ◽  
ETHAN GODDARD-BORGER ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Fluorogenic Substrate ◽  
Potassium Salts ◽  
X Ray ◽  
Sulfoquinovosyl Diacylglycerol ◽  
Sodium And Potassium

<p>The sulfolipid sulfoquinovosyl diacylglycerol (SQDG) and its headgroup, the sulfosugar sulfoquinovose (SQ), are estimated to harbour up to half of all organosulfur in the biosphere. SQ is liberated from SQDG and related glycosides by the action of sulfoquinovosidases (SQases). We report a 10-step synthesis of SQDG that we apply to the preparation of saturated and unsaturated lipoforms. We also report an expeditious synthesis of SQ and (<sup>13</sup>C<sub>6</sub>)SQ, and X-ray crystal structures of sodium and potassium salts of SQ. Finally, we report the synthesis of a fluorogenic SQase substrate, methylumbelliferyl a-D-sulfoquinovoside, and examination of its cleavage kinetics by two recombinant SQases.</p>

Heats of Solution of Some Sodium and Potassium Salts in Water and in Water-Methanol Mixtures

1992 ◽  
Vol 57 (11) ◽  
pp. 2227-2234 ◽  
Author(s):  
Ján Benko ◽  
Oľga Vollárová
Keyword(s):  
Transfer Functions ◽  
Enthalpies Of Solution ◽  
Potassium Salts ◽  
Solvent Interactions ◽  
Heats Of Solution ◽  
Solvent Molecules ◽  
Sodium And Potassium

The enthalpies of solution ∆Hs0 were determined for NaSCN, KSCN, NaBrO3, KBrO3, NaClO3, KClO3, NaIO4, KMnO4, KNO2 and NaNO2 in water-methanol mixtures. The transfer functions ∆Ht0 of the salts and anions were calculated based on the extrathermodynamic TPTB assumption. The ∆Ht0 values of the anion obtained from the sodium and potassium salts were compared. The differences observed, particularly at higher concentrations of the cosolvent, are discussed with respect to the interactions between the solvent molecules and the solute-solvent interactions.

Self-assembly of sodium and potassium betulinates into hydro- and organo-gels: entrapment and removal studies of fluorophores and synthesis of gel–gold nanoparticle hybrid materials

RSC Advances ◽  
2016 ◽  
Vol 6 (21) ◽  
pp. 17290-17296 ◽  
Author(s):  
Braja Gopal Bag ◽  
Shib Shankar Dash
Keyword(s):  
Gold Nanoparticle ◽  
Hybrid Materials ◽  
Betulinic Acid ◽  
Self Assembly ◽  
Solvent Mixtures ◽  
Potassium Salts ◽  
Aqueous Solvent Mixtures ◽  
Aqueous Solvent ◽  
Removal Studies ◽  
Sodium And Potassium

Sodium and potassium salts of a renewable nano-sized triterpenoid betulinic acid have been prepared and their self-assembly properties in water and aqueous solvent mixtures have been studied.

New nitrogen-rich heterocyclic compounds to build 3D energetic metal complexes

CrystEngComm ◽  
2020 ◽  
Vol 22 (27) ◽  
pp. 4573-4579
Author(s):  
Xiaoming Yang ◽  
Yanna Wang ◽  
Weijing Zhang ◽  
Yanli Yin ◽  
Zhimin Li ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Energetic Materials ◽  
Heterocyclic Compounds ◽  
Three Dimensional ◽  
Potassium Salts ◽  
Heat Resistant ◽  
Sodium And Potassium

By introducing hydroxymethyl into nitrogen-rich heterocyclic compounds, we designed and synthesized a new ligand. The three dimensional (3D) energetic metal complexes sodium and potassium salts of new ligand were investigated for heat-resistant energetic materials.

Spectra of sodium and potassium azide crystals coloured by ultra-violet and X -ray radiation

1959 ◽  
Vol 251 (1264) ◽  
pp. 27-40 ◽  
Keyword(s):  
Sodium Salt ◽  
Ultra Violet ◽  
Liquid Nitrogen Temperature ◽  
Mechanism Of Formation ◽  
Potassium Salts ◽  
Absorption Bands ◽  
X Ray ◽  
Rate Of Increase ◽  
Potassium Azide ◽  
Sodium And Potassium

The spectra of sodium and potassium azide crystals that had been coloured by irradiation with both ultra-violet and X-ray radiation for varying periods at liquid-nitrogen temperature have been recorded. From these results and from measurements of the rate of increase of intensity of the various absorption bands with time, together with the changes observed on raising the temperature, the nature and mechanism of formation of some of the centres are deduced. The different behaviour of the sodium and potassium salts under irradiation and the different effects produced by the two types of irradiation, particularly with the sodium salt, are discussed.

Sign in / Sign up

Export Citation Format

Share Document