10 or 20 wt % aqueous solution with different composition was prepared and degassed by repeated vacuum and nitrogen purges. Into the polymer solu- 944 tion was added glutalaldehyde (10 mol %) and catalyt- ic HCl, and the reaction mixture was placed at 40 C for 5 h. The gel sheets ...
The double cubes are O(2) sensitive, much more so in HCl than Hpts (pts(-) = p-toluenesulfonate), and are oxidized by H(+) in HCl solutions with the formation of H(2) (detected by gas chromatography). The single cubes are less reactive in air, and are only oxidized by H(+) ...
酸碱标准溶液的配制与标定(Preparationandcalibrationofstandardsolutionofacidandalkali) Acidstandardsolution StandardacidsolutionsareusuallyformulatedwithHClsolutions,ofteninconcentrationsof0.1mol/L,butaresometimesusedatconcentrationsashighas1mol/Landlowto0.01mol/L.TheHClstandardsolutionisfairlystable,sothestandard...
Advantages of Tris-HCL buffer 1,High solubility, good water solubility, the liquid configured is clear. 2,The purity is more than 99%, the performance is stable and no other influence is produced. 3,Does not react with other metal ions in the solution, such as...
To a 1.5-mL microcentrifuge tube (Eppendorf), 100 µL of human serum, 400 µL of 10 mM Tris–HCl, pH 8.0, 5 µL of 500 mM ethylenediaminetetraacetic acid (EDTA), 1.5 µL of 5 M NaCl, 10 µL of 10% (w/v) SDS, and 10 µL of 20 mg/mL proteinase K (Qiagen) wer...
Thus, this study proposed an eco-friendly technology for producing high-purity silica from high-silica IOTs through the coupling of superconducting high gradient magnetic separation (S-HGMS) preconcentration with leaching followed by the use of ultrasound-assisted fluorine-free acid solution. Following ...
Ni foam (1.0 × 1.0 cm2) and Ti sheet (1.0 × 1.0 cm2) were pretreated in acetone and ethanol (volume ratio is 1:1) for 30 min to remove the impurities attached on the electrode surface, then put them into 3.0 M HCl solution for 15 min to remove the oxide lay...
Pectin, a natural polysaccharide found in the cell wall of most higher plant such as citrus, has drawn much attention due to its potential beneficial role in facilitating the treatment of many diseases like cancer, hyper cholesterol and diabetes. However, the broad application of pectin faces grea...
solution, it may, for example, be circulated through a 4 Angstrom molecular sieve bed. A water content in the diester/solvent solution of no more than about 500 weight parts per million, by weight, is preferred. Moisture should also be excluded from the reaction apparatus by appropriate ...
acidified to pH 4 with 2M HCl solution, and extracted with 2×15 mL of dichloromethane. The combined organic extracts were dried over magnesium sulfate and solvent was removed under reduced pressure, to yield 450 mg of a colorless oil. The material was purified by short path distillation to ...