Biomedical subjects

S Thorson

Publications and source records attributed to S Thorson.

5 recordsLinked to original sources

PubMed1995

Macbeth in the resource room: students with learning disabilities study Shakespeare.

A teacher describes a secondary English unit on Shakespeare implemented in a manner designed to take advantage of the learning differences of resource room students. After developing and investigating questions relating to Macbeth, students then read and enjoyed the drama. As a result of acquiring an understanding of Shakespeare exceeding that of students in general classes, self-esteem and academic motivation increased. Finally, connections to practice and behavioral, constructivist, feminist, and critical theories are discussed. Appendices describe specific schedules and routines.

Adolescent↗

PubMed1982

The paradox of inhibition and enhancement of the formation of urinary stones.

Nucleation (Bo) and linear crystal growth (G) rates, average particle size (L1,0) and total mass (MT) of calcium oxalate dihydrate crystals were measured in artificial urine with and without polylysine, polyglutamic acid or heparin. The purpose of the study was to see if any of these polymers had effects on crystallisation similar to those created by addition of 5% natural urine to artificial urine, wherein Bo had increased but G, L1,0 and MT decreased. Polylysine addition had insignificant effects. Heparin increased Bo and decreased G, L1,0 and MT significantly, and polyglutamate had similar but more marked effects than did heparin. It is concluded that properly structured organic polymers can significantly inhibit calcium oxalate dihydrate crystallisation by paradoxical enhancement of nucleation. It is possible that such polymers may act as nucleation substrates.

Calcium Oxalate↗

PubMed1982

Experimental salmon poisoning disease in juvenile coyotes (Canis latrans).

Salmon poisoning disease (SPD) was experimentally induced in juvenile coyotes (Canis latrans). The disease was lethal in 11 of 12 coyotes within 15 days after inoculation with 1,000 or 4,000 metacercariae of Nanophyetus salmincola. Clinical manifestations of the disease included lymph node enlargement, anorexia, pyrexia, diarrhea and death. Coccoid bodies indistinguishable from rickettsiae were observed in macrophages of spleen, liver, lymph nodes, and duodenum. Percentage recovery of adult trematodes from metacercariae administered was 23% from 12 inoculated coyotes, compared to 13% in one inoculated dog. Juvenile coyotes appear to be highly susceptible to experimental SPD.

Animals↗

PubMed1980

Effects of urinary organic macromolecules on crystallization of calcium oxalate: enhancement of nucleation.

The urine of normal persons, as well as that of stone formers, contains inhibitors to crystallization of calcium oxalate. To ascertain differences, if any, between these 2 groups we measured nucleation rate, growth rate and total mass produced in an analytic system with 5 per cent urine added to 95 per cent synthetic urine that did not contain large organic molecules. We also observed the effects of addition of uromucoid to the synthetic solution. Normal urine and stone-forming urine contained significant inhibitors to total mass of calcium oxalate dihydrate crystals precipitated but total crystal mass was not significantly different between the 2 groups. Growth rate was significantly less in experiments with the urine of stone formers. The other major difference found in stone-forming urine was significant enhancement of nucleation rate when compared to normal urine. Since addition of uromucoid produced these same growth inhibition and nucleation enhancement effects but did not affect total crystal mass, we hypothesize that uromucoid has an important part in producing the differences noted between and stone-forming urine.

Adult↗

PubMed1979

Effects of urinary organic macromolecules on crystallization of calcium oxalate: enhancement of nucleation.

The urine of normal persons, as well as that of stone formers, contains inhibitors to crystallization of calcium oxalate. To ascertain differences, if any, between these 2 groups we measured nucleation rate, growth rate and total mass produced in an analytic system with 5% urine added to 95% synthetic urine that did not contain large organic molecules. We also observed the effects of addition of uromucoid to the synthetic solution. Normal urine and stone-forming urine contained significant inhibitors to total mass of calcium oxalate dihydrate crystals precipitated but total crystal mass was not significantly different between the 2 groups. Growth rate was significantly less in experiments with the urine of stone formers. The other major difference found in stone-forming urine was significant enhancement of nucleation rate when compared to normal urine. Since addition of uromucoid produced these same growth inhibition and nucleation enhancement effects but did not affect total crystal mass, we hypothesize that uromucoid has an important part in producing the differences noted between normal and stone-forming urine.

Adult↗