DURING recent years a good deal of attention has been given to the investigation of the molecular weight of `native' cellulose, but the results are highly discordant, the values most frequently quoted being those of Mark(about 30,000, on the basis of micell length by X-ray analysis and oth...
A low-molecular-weight (LMW) heterofucan (designated fucan B) was obtained from the brown seaweed, Spatoglossum schröederi, and its activity as an inhibitor of capillary-like tube formation by endothelial cells (ECs) was analyzed. Chemical, infrared and electrophoretic analyses confirmed the...
0.200 moles of H 2 S 6.82 g 2) 0.100 moles of KI 16.6 g 3) 1.500 moles of KClO 135.8 g 4) 0.750 moles of NaOH 30.0 g 5) 3.40 x 10¯ 5 moles of Na 2 CO 3 3.6 x 10 -3 g Calculate the moles present in: 1) 2.00 grams of H 2 O .111 mol 2) 75.57 grams of KBr ....
0.025 g), glutamic acid (0.8 mmol, 0.118 g), glutamine (0.6 mmol, 0.088 g), asparagine (0.6 mmol, 0.080 g), or phenylalanine (0.6 mmol, 0.099 g) was added, respectively, and the pH value of the solution was adjusted to 8-9 with NaOH solution. ...
In the present investigation Bi3+ polymers were prepared by diluting different concentrations of Bi(NO3)3·5H2O solutions to pH 1 ± 0.1 by adding 0.1 M NaOH solution as it starts to precipitates at pH 1.4. The degree of polymerization was found to be 5-6 units. Particle size...
(e.g. NaOH) in a solvent (e.g. water or DMF) at >=60 deg.C and then as necessary pH thereof is controlled to 1.0-1.5 using an inorganic acid such as hydrochloric acid and the reaction product is allowed to stand for 2 to 3 days to provide PGA controlled in molecular weight. PGA...
The samples of interested were fully dissolved in 2 M NaOH solution (D2O) and loaded in NMR tubes. The recycle delay was set to 6 s. The quantifications of probe molecules were determined by the integrals of their 1H signals, normalized by the integral of the benzene 1H signal of ...
The hydroxylation of 1,2,3-trichloro-4,6-dinitrobenzene (DNTCB) with NaOH into 2-chloro-4,6-dinitroresorcinol (CDNR) was promoted in aqueous micellar solutions of cationic surfactants showing the role of cationic head group-π interaction with DNTCB molecules in catalysis. select article Solu...
Fluorescence analysis is a fast and sensitive method, and has great potential application in trace detection of environmental toxins. However, many important environmental toxins are non-fluorescent substances, and it is still a challenge to construct a
This directionality issue has been studied in detail in the case of low-molecular-weight guests36, but not yet in the case of polymeric ones. For future experiments, however, we intend to use C2-symmetric porphyrin macrocycles that contain two diagonally placed motor elements, resolving the ...