Synthesis, in vitro and in vivo anticancer activities of novel 4-substituted 1,2-bis(4-chlorophenyl)-pyrazolidine-3,5-dione derivatives

To develop potent and selective anticancer agents, a series of novel 4-substituted 1,2-bis(4-chlorophenyl)-pyrazolidine-3,5-dione derivatives were designed and synthesized.

Nematode interactions with weeds and sugarcane mosaic virus in louisiana sugarcane

Weeds did not appear to serve as reservoirs for phytophagous Louisiana sugarcane nematode populations except for Criconemella spp., Meloidogyne spp., Tylenchorhynchus annulatus, and total phytophagous nematode densities were lower on weed-stressed cane and were accompanied by reduced accumulations of free cysteine, proline, and 13 other free amino acids in sugarcane. A significant weed-virus interaction for sugarcane free cysteine accumulation was detected; T. annulatus populations were highly correlated (r = 0.59, P </= 0.001) with the weed-induced and virus-induced changes in free cysteine. Sugarcane nematodes interacted differently with the weed and virus stresses and changes in host plant stress-related free amino acid concentrations.

Peanut agglutinin as a surface marker for canine T lymphocytes

Peanut agglutinin (PNA) and surface immunoglobulin (SIg) were investigated as markers for T and B lymphocytes in blood and lymphoid tissues of dogs of various ages. In the blood study, 4 age groups (n = 8 dogs/group) were used. The mean (+/- SD) percentages of PNA-positive (PNA+) cells were 68.4 +/- 8.6% (group 1, less than 1 year old), 70.3 +/- 9.2% (group 2, 1 to 2 years old), 72.0 +/- 3.7% (group 3, 5 to 6 years old), and 63.8 +/- 10.1% (group 4, 10 to 11 years old). The mean percentages of SIg-positive (SIg+) cells in blood were 32.1 +/- 10.6% (group 1), 43.2 +/- 7.0% (group 2), 34.3 +/- 4.8% (group 3), and 35.0 +/- 6.8% (group 4). The mean total percentages of PNA+ and SIg+ cells were 100 +/- 6.0% (group 1), 113.5 +/- 4.9% (group 2), 106.3 +/- 5.3% (group 3), and 98.9 +/- 9.2% (group 4). The proportions of PNA+ and SIg+ cells in dogs of group 2 were significantly (P less than 0.05) different from those in dogs of the other groups. Serial changes in PNA+ and SIg+ cells were investigated in blood of 6- to 29-week-old pups (n = 8). A significant (P less than 0.05) transient decrease in PNA+ cells and a corresponding increase in SIg+ cells was observed in pups between 14 and 17 weeks old. Lymphoid tissue specimens and blood samples were obtained from 2- to 6-month-old dogs (n = 11) and from 6- to 12-month-old dogs (n = 10).(ABSTRACT TRUNCATED AT 250 WORDS)

Retention of emergency care knowledge

This study provided data on the emergency care knowledge of students as measured by a pretest, posttest, and retention test. Fifty college students were the sample. The mean score for pretest was 62, posttest 86.75, and retention test 83.6. Pearson correlations were calculated for pretest, posttest, and retention test pairwisely. Data analyses revealed that all correlations were significantly greater than zero at the .05 level. A high relationship existed between students' posttest scores and retention test scores. ANOVA was used to gather information to determine if significant differences in students' first aid knowledge existed between the posttest and the retention test. Findings indicated that there was a significant difference between the emergency care knowledge scores of students when comparing the posttest to the retention test.