… In accordance with this view, a simple, efficient, and practical method is being reported
for the Knoevenagel condensation between active methylene compound with aromatic and
heteroaromatic aldehydes in excellent yields using inexpensive pineapple juice as a
natural catalyst. The … For the present work, an extract of pineapple has been used as
natural catalyst for Knoevenagel condensation. … In continuation of the research program
concerning the investigation of new natural catalyst, herein is reported in this paper an …

The antimicrobial potential of guava (Psidium guajava) leaf extracts against two gram-
negative bacteria (Escherichia coli and Salmonella enteritidis) and two gram-positives
bacteria (Staphylococcus aureus and Bacillus Cereus) which are some of food borne and
spoilage bacteria. The guava leaves were extracted in four different solvents of increasing
polarities (hexane, methanol, ethanol and water). The guava (Psidium guajava) is a
Phytotherapic plant used in folk medicine that is believed to have active components that …