A bibliometric analysis of coconut sap research

@#Introduction: Coconut sap is a sweet, fragrant liquid obtained from the inflorescence of coconut tree. In this study, a literature search was conducted using the Scopus database to study the trends of coconut sap research. Methods: Data extracted from the Scopus database were analysed and visualised using VOSviewer to determine top authors, papers, countries, collaborations, and research areas. A total of 76 publications up to year 2021 were identified and refined using keywords of “coconut sap”, “coconut sugar”, “coconut inflorescence”, “coconut inflorescence sap”, “coconut neera”, and “Cocos nucifera”. Results: Based on the analysis, research on coconut sap started in 1984, with a total of 53 authors, nine countries, and 12 sources that had published more than two documents. The analysis of countries and sources revealed that India and IOP Conference Series: Earth and Environmental Science (EES) were the most prolific country and sources, respectively. The most influential document was on the chemical compositions and bacteriology of coconut sap. The results also showed that research on coconut sap was in the field of food processing during the early years, followed by fermentation, agriculture, and bacteriology of coconut sap. Research on coconut sap’s bacteriology started in 1986 and became a major interest, especially among high impact journals. Conclusion: Overall, coconut sap is a potential target for the development of nutraceutical products, especially in the food and beverage industry.

Isolation and characterization of novel antibacterial compound from an untapped plant, Stereospermum fimbriatum.

Stereospermum fimbriatum or locally known as "Chicha" is traditionally used for itchy skin, earache, stomachache and postpartum treatments. This study was designed to evaluate the antimicrobial potential of S. fimbriatum's stem bark against 11 pathogens and isolate its bioactive compound. Successive soxhlet extraction was conducted using n-hexane, dichloromethane (DCM) and methanol. Disc diffusion, minimum inhibitory and bactericidal concentration (MIC & MBC) assays were done to examine the antimicrobial activity. Bioassay-guided isolation was conducted on S. fimbriatum's extract. The DCM extract of stem bark (DS) was the most potent extract followed by n-hexane extract of the stem bark (NS). A novel compound was isolated and coded as C1 which demonstrated potent antibacterial effects with the MIC values as low as 3.13 µg/mL to 6.25 µg/mL, against S. epidermidis, MRSA and S. aureus. Thus, S. fimbriatum could be a potential source of antimicrobial agents for the treatment of skin infections, specifically, MRSA.

In vitro antimicrobial activity of mangrove plant Sonneratia alba.

OBJECTIVE: To investigate the antimicrobial property of mangrove plant Sonneratia alba (S. alba). METHODS: The antimicrobial activity was evaluated using disc diffusion and microdilution methods against six microorganisms. Soxhlet apparatus was used for extraction with a series of solvents, n-hexane, ethyl acetate and methanol in sequence of increasing polarity. RESULTS: Methanol extract appeared to be the most effective extract while n-hexane extract showed no activity. The antimicrobial activities were observed against the gram positive bacteria Staphylococcus aureus (S. aureus) and Bacillus cereus (B. cereus), the gram negative Escherichia coli (E. coli) and the yeast Cryptococcus neoformans. Pseudomonas aeruginosa and Candida albicans appeared to be not sensitive to the concentrations tested since no inhibition zone was observed. E. coli (17.5 mm) appeared to be the most sensitive strain followed by S. aureus (12.5 mm) and B. cereus (12.5 mm). CONCLUSIONS: From this study, it can be concluded that S. alba exhibits antimicrobial activities against certain microorganisms.