U.S. Immigrants and the Global Narrative

Changing Identities: Vietnamese Americans, 1975-1995. James M. Freeman. New Immigrant Series. Boston; Allyn and Bacon, 1995. 132 pp.
From the Workers' State to the Golden State: Jews from the Former Soviet Union in California. Steven J. Gold. New Immigrant Series. Boston; Allyn and Bacon, 1995. 122 pp.
From the Ganges to the Hudson: Indian Immigrants in New York City. Johanna Lessinger. New Immigrant Series. Boston: Allyn and Bacon, 1995. 159 pp.
Salvadorans in Suburbia: Symbiosis and Conflict. Sarah J. Mahler. New Immigrant Series. Boston: Allyn and Bacon, 1995.127pp.
Visa for. Dream: Dominicans in the United States. Patricia R. Pessar. New Immigrant Series. Boston: Allyn and Bacon, 1995. 98 pp.     

Dispersion and isolation of beating cells from adult rat heart

The cells of adult rat heart ventricles were dispersed using crude bacterial collagenase. An investigation into the effect of shaking speed, stroke length, concentration of enzyme, ionic composition, and pH of the dispersing medium permitted the development of optimal conditions for obtaining beating myocytes. Approximately one-quarter of the initial protein content of ventricular chunks could be routinely recovered as single cells after such dispersion. Centrifugation through solutions of Ficoll in phosphate buffer selectively concentrated the beating myocytes and removed contaminating cells and tissue debris.     

Prior exposure to footshock induced naloxone hyperalgesia.

The incidence of squeaking and jumping elicited by 5 minutes of intermittent footshock was studied in rats during two successive tests separated by 1 week. The mean number of occurrences of each behavior was the same in each test. Naloxone, 5 mg/kg i.p., which was without effect when administered prior to the first test, significantly increased the number of squeaks but not jumps when administered prior to the second test. It is suggested that prior shock treatment can induce naloxone hyperalgesia depending upon the behavior used as the measure of pain response.     

An examination of the rate assay to determine the active site normality of papain

Data are presented which demonstrate that the α-N-benzoyl-l-argine ethyl ester rate assay procedure, based on a burst titration with N-benzyloxy-carbonyl-l-tyrosine p-nitrophenyl ester as previously desribed (1), is an accurate and reliable method for determining the normality of papain in solution.