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Follow-up of 10 schizophrenic children admitted to a child psychiatric unit revealed that outcome was related to such factors as age of onset, and clinical subtype. Deterioration following the active phase of the illness occurred in only four cases, indicating that the outcome may be more favorable than generally assumed. (Author)

The results of a 13 °C, 9 GHz electron-paramagnetic resonance (EPR) investigation of the sulfate salts of the species formed by the base hydrolyses of solutions containing Mn2+ and Al3+, in the molar concentration range 1≤Mn/(Al+Mn)≤10% is reported. The EPR spectra of the microcrystalline samples consisted of the superposition of two overlapping axial, hyperfine structure (hfs) central transition Mn2+ resonances with g=1.9994(2) D=6.93(3) mT, A=8.56(3) mT, A=8.49(2), P=0.4(1)×10-4 mT, and gn=0.7(1)×10-3, and an unresolved resonance due to exchange coupled Mn2+ ions. The results are consistent with the interpretation that the resolved axial symmetry hfs central transition spectrum arises from Mn2+ ions replacing aluminum in either the tetrahedral or octahedral sites of the tridecameric Keggin-like cation [AlO4Al12(OH)24H2O)12]7+, which is known to form when Al3+ solutions are hydrolyzed under these conditions. The unresolved, exchange coupled spectrum must arise when two or more Mn2+ ions substitute into the same cation. The ratio of the intensities of the axial and exchange coupled Mn2+ centers had a maximum near the stoichiometric molar concentration 7.69% [i.e., Mn/(Al+Mn)=1:13]. The temperature dependence of the EPR spectral intensity and total hfs splitting for the resolved hfs central transition spectrum revealed that a first-order isomorphous phase transition occurred at 120 °C. . [ABSTRACT FROM AUTHOR]

Discusses a successful program in which University of Calgary science/engineering departments offer high school students the opportunity to work on a research project under guidance of a faculty member. Includes history and benefits of the program, selection of students, project work, and orientation/seminar days. (Author/JN)