Stool Complexes Research Articles

The Two Janus Faces of CpRu‐Based Deallylation Catalysts and Their Application for in Cellulo Prodrug Uncaging

AbstractIn the past 18 years, metal‐catalyzed deallylation has proven a useful tool for studying biological processes in cellulo and in the early development of innovative therapeutic catalytic strategies. This reaction is catalyzed by Ru‐piano stool complexes and has been reported to be compatible with air, water, and thiol‐containing compounds such as glutathione. However, little is known about the true influence of biological components on the outcome of this reaction. The results presented herein reveal that the co‐solvent used in the reaction affects the complex's stability and activity in air, while the presence of glutathione contributes to minimizing the formation of N‐allylated by‐products. In addition, we studied the effect of air on the Ru‐catalyzed deallylation. Importantly, we found that, in the presence of air, the complex is deactivated and oxidizes glutathione into its disulfide.

Use of DNA Probes in the Diagnosis of Infectious Disease

AbstractDNA probes specific for bacterial or other viral pathogens can be used in DNA hybridization assays to detect the presence of the pathogen in food, stool, urine, or other complex samples. Such assays are faster and less expensive than traditional microbiological culture techniques, and in many applications can compete with assays based on monoclonal antibodies.

Effect of Leaf Shading on Flowering Processes of Sugarcane

The effect of leaf shading on the regulation of sugarcane flowering processes by young expanding leaves was investigated. A severe flowering repression produced by shading the leaves with aluminum foil, for one week at the onset of expansion, suggests that the leaf is highly capable of perceiving the critical photoinductive light and of producing a flowering stimulus during its emergence from a tightly rolled spindle. Both floral induction and time of tassel emergence were significantly affected. A persistently significant suppression of floral induction as a result of leaf shading in stools having variable proportions of treated and untreated stalks demonstrated that individual stalks proceed more or less independently with their flowering processes within a stool complex. No evidence was found of interstalk transport of a flowering stimulus. It is suggested that the effectiveness of leaf shading within treated stalks is very possibly a translocation phenomenon.