Abstract:The objective of the research work was to compare the phytochemical constituents, macronutrients and the antioxidant activities of two species of the unripe and ripe methanolic extracts of Musa paradisiaca and Musa accuminata flour. The phytochemical screening was carried out using standard procedures, while the radical scavenging ability was carried out using the stable radical 1,1-Diphenyl-1-picrylhydrazyl (DPPH). The phytochemical screening revealed that the unripe M. Paradisiaca powder contains steroids, terpenoids and saponins, whereas the ripe M. Paradisiaca powder contains volatile oil, while both the ripe and unripe M. Paradisiaca contain triterpenoids, cardiac glycosides, flavonoids, alkaloids and carbohydrates. The ripe M. accuminata powder contains steroids, terpenoids, glycosides and balsams, while the unripe M. accuminata does not contain any of these but both the ripe and unripe M. accuminata powder contain triterpenoids, cardiac glycosides, flavonoids, alkaloids, carbohydrates and saponins. The proximate composition (%) of the plantain powder are;

Abstract:The objective of the study was to carry out phytochemical, nutritional and antimicrobial evaluations of the aqueous extract of Brassica nigra seeds. The nutritional and phytochemical analyses were carried out by adopting standard methods. The antimicrobial study was carried out by using agar well diffusion method. The nutritional evaluation of the seeds of Brassica nigra showed that it contained moisture 4.16%, crude fibre 0.30%, crude fat 30.30%, ash 5.14%, crude protein 24.70% and carbohydrate 35.40%. The phytochemical screening of the seeds indicated the presence of saponins, alkaloids, flavonoids, glycosides, reducing sugar, phlobatannins and volatile oil. It was observed that the extract was effective in inhibiting Escherichia coli, Klebsiella pneumonia, Salmonella para-typhi, Pseudomonas aeuriginosa and Staphylococcus aureus, with the zone of inhibition ranging between 7mm and 23mm. The extracts of the Brassica nigra seeds can be used for common cold, painful joints and muscles (rheumatism), arthritis, edema, and increasing appetite. The seeds can also serve as a source of cooking oil because of the high content of crude fat and ethno medicine.

The objective of the study was to determine the medicinal values of Boswellia dalzielii plant by carrying out the proximate analysis, antimicrobial screening and phytochemical constituents of hexane, ethyl acetate and ethanolic extracts of the leaves and bark of the plant. Standard methods were used for the proximate and phytochemical screenings. Well diffusion method was applied for the antimicrobial screening of the extracts. The proximate analysis of the leaves shows; moisture 12.24%, ash 7.43%, crude fibre 32.85%, crude lipids 20.41%, crude protein 1.00% and carbohydrate 26.07% and that of the bark shows; moisture 8.51%, ash 14.23%, crude fibre 42.86%, crude lipid 14.23%, crude protein 0.40% and carbohydrate 19.56%.The phytochemical screening of the leaves indicated the presence of tannins, cardiac glycosides, flavonoids, terpenoids, alkaloids and balsams while that of the bark indicated the presence of steroids, glycosides, alkaloids, terpenoids, flavonoids, and saponins. The antimicrobial screening of the leaves and bark extracts shows that they were active against Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa and Staphylococcus aureus.

A Comparative study on the phytochemical constituents and antimicrobial activities of the ethanolic and petroleum ether extracts of the leaves of Albizia lebbeck and its mistletoe was carried out. The phytochemical screening was carried out by adopting standard methods. Agar well diffusion method was employed for the antibacterial and antifungal screenings of the extracts of the leaves of Albizia lebbeck and its mistletoe. The phytochemical screening results revealed the presence of flavonoids, quinone, saponins, terpenoids, anthraquinone and steroids in the ethanol extract of Albizia lebbeck leaves while the ethanol extract of the mistletoe leaves revealed the presence of flavonoids, phenols, quinone, saponins, terpenoids, anthraquinones and steroids. The petroleum ether extract of the leaves of Albizia lebbeck revealed the presence of terpenoids, anthraquinone and steroids, while the petroleum ether extract of the mistletoe leaves revealed the presence of saponins, terpenoids, anthraquinone and steroids. For the antibacterial activities screening the results revealed the ethanol extract of the mistletoe leaves to have greater zone of inhibition in Salmonella typhi (16 mm), Staphylococcus aureus (20 mm) and Escherichia coli (15 mm) than the ethanol extract of the Albizia lebbeck leaves in Salmonella typhi (14 mm), Staphylococcus aureus (16 mm) and Escherichia coli (13 mm). For the petroleum ether extracts, the extract of the mistletoe leaves have greater zone of inhibition also in Salmonella typhi (16 mm), Staphylococcus aureus (20 mm) and Escherichia coli (14 mm) than the extract of the Albizialebbeck leaves in Salmonella typhi (13 mm), Staphylococcus aureus (18 mm) and Escherichia coli (13 mm). For the antifungal activities screening, the results revealed the ethanol extract of the mistletoe leaves to have greater zone of inhibition in Aspergillus fumigatus (16 mm), Aspergillus niger (14 mm), Fusarium oxysforum (9 mm) than the ethanol extract of Albizia lebbeck leaves in Aspergillus fumigatus (14 mm), Aspergillus niger (13 mm) and Fusarium oxysforum (8 mm). For the petroleum ether extracts, the extracts of the mistletoe leaves have greater zone of inhibition in Aspergillus niger, while the extract of the Albizia lebbeck leaves have greater zone of inhibition in Aspergillus fumigatus but they both have the same zone of inhibition in Fusarium oxysforum (7 mm). Generally, the results of the antimicrobial screening showed the extracts of the leaves of the mistletoe to be more active than the leaves of the Albizia lebbeck. The leaf extracts of Albizia lebbeck and mistletoe are useful phytodrugs which possess both antibacterial and antifungal activities.

The objective of this study was to determine the phytoconstituents and antimicrobial activities of the hexane, ethanolic and ethyl acetate extracts of Spigelia anthelmia leaves. The phytochemical analysis was carried out using standard methods. The Agar well diffusion method was adopted in carrying out the antimicrobial screening. The results of the phytochemical analysis indicated the presence of saponins, tannins, steroids, terpenoids, resins and volatile oils in hexane extract; saponins, alkaloids, tannins and balsams in ethanolic extract and tannins, steroids, terpenoids and volatile oils in ethyl acetate extract. The antimicrobial screening indicated that the hexane extract was active on Escherichia coli, Salmonela typhi, Klebsiela pneumonia and Pseudomonas ariginosa but inactive on staphylococcus aureus. The ethanolic extract was active on all the test organisms. The ethyl acetate extract was active on Escherichia coli, Salmonella typhi, Klebsiella pneumonia and Pseudomonas ariginosa but inactive on staphylococcus aureus. This indicated that the hexane, ethanolic and ethyl acetate extracts of Spigelia anthelmia leaves can serve as potential antibiotics in ethno medicines.