Reference

Ionic conduction transition in single crystals of strontium chloride observed by electron paramagnetic resonance of gadolinium(3+)

Ionic conduction transition in single crystals of strontium chloride observed by electron paramagnetic resonance of gadolinium(3+). Boldu, J. L.; Munoz P., E.; Gleason, R. J.; Maldonado S., J. (Inst. Fis., Univ. Nac. Auton. Mexico, Mexico City 01000, Mex.). Radiat. Eff. 10476-85-4 and 22541-19-1 are cas registry numbers of chemicals which are used as reagents here. Defects Solids, 119-121, 223-4 (English) 1991. CODEN: REDSEI. ISSN: 1042-0150. DOCUMENT TYPE: Journal CA Section: 76 (Electric Phenomena) Section cross-reference(s): 77 The EPR spectrum of strontium chloride was detd. at temps. between 300 and 1060 K with a gadolinium probe. The resulting curve resembles in shape that obtained for elec. cond. The inflection point in the curve coincides with the temp. expected for the ionic conduction transition. .

Chitosan-poly(acrylic acid) complex semiinterpenetrating polymer network membrane and its stimulating response for pH and ions

Chitosan-poly(acrylic acid) complex semiinterpenetrating polymer network membrane and its stimulating response for pH and ions. Li, Wenjun; Wang, Hanfu; Lu, Yuhua; Wang, Zhiliang; Zhong, Wei ( Department Macromolecular Science, Fudan University, Shanghai 200433, Peop. Rep. 10476-85-4 and 7447-41-8 are also occured in this study. China). Gaofenzi Xuebao, (1), 106-110 (Chinese) 1997 Kexue. CODEN: GAXUE9. ISSN: 1000-3304. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 38, 44 A novel semi-interpenetrating polymer network (semi-IPN) membrane composed of crosslinked chitosan (CS) and poly(acrylic acid) (PAA) was prepd. The IR spectra confirmed that CS and PAA formed polyelectrolyte complex through electrostatic interaction between NH3+ group from CS and COO- group from PAA. The semi-IPN membrane exhibited a typical pH-sensitivity and the degree of swelling in different salt solns. with equal metal ionic valence and ionic strength were on the same level. Under certain ionic strength (I = 1.5 mol/L), the degree of swelling increased with increasing metal ionic valence. The elongation of the semi-IPN membrane could vary reversibly by addn. of CaCl2 soln. and KCl soln. alternately. .