Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 2

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

Investigating the Effectiveness of Aquatic Plant Species as Bioindicators for Detecting Petroleum Hydrocarbon Pollution in the Marsh Ecosystems of Ogoniland, Niger Delta, Nigeria

100%
Ekpo P. B., Ekpo I. P., Inaku A. G., Ogbaji H. O., Unoh F. B., Job I. E., Effiong N. M.
World News of Natural Sciences
|
2025
|
vol. 62
106-118
EN
The Niger Delta region, particularly Ogoniland, has faced extensive environmental pollution due to petroleum activities, raising concerns about the contamination of aquatic ecosystems. This study aimed to investigate the levels of Total Petroleum Hydrocarbons (TPHs), Polycyclic Aromatic Hydrocarbons (PAHs), and n-Alkanes in four aquatic plant species Eichhornia crassipes, Phragmites karka, Typha domingensis, and Nymphaea lotus from Ogoniland and evaluate their potential as bioindicators for petroleum contamination. Samples of these aquatic plants were collected from the polluted area and analyzed using Soxhlet extraction for TPHs, spectrofluorometry for total petroleum hydrocarbon quantification, and gas chromatography for PAHs and n-Alkanes. The results revealed that Eichhornia crassipes accumulated the highest concentration of TPHs at 18.7 ± 1.2 µg/g dry weight, followed by Typha domingensis (18.1 ± 1.2 µg/g), Phragmites karka (17.5 ± 1.1 µg/g), and Nymphaea lotus (15.8 ± 1.0 µg/g). Similarly, Eichhornia crassipes also showed the highest PAH levels at 112.5 ± 8.4 ng/g, whereas Nymphaea lotus had the lowest PAH concentration at 101.2 ± 7.5 ng/g. The study found a predominance of high molecular weight PAHs and identified a biogenic origin for most n-Alkanes, with Phragmites karka reflecting some anthropogenic influences. These findings suggest that Eichhornia crassipes is the most effective bioindicator for petroleum contamination among the studied species, highlighting the value of aquatic plants in environmental monitoring. Future research should focus on the long-term effects of petroleum pollutants on these plants and assess how seasonal variations might influence contaminant levels.
2
Publication available in full text mode
Content available

Evaluation of essential Oils extracted from Ocimum gratissimum L. (scent leaf) as organic preservative in comparison with synthetic preservative (dichlorvos) in grains storage

100%
Ekpo P. B., Abu G. I., Ekpo I. P., Chinyere O.-A., Ogbaji H. O., Job I. E., Achimole C. C.
World News of Natural Sciences
|
2025
|
vol. 62
183-197
EN
The use of synthetic preservatives in grain storage has raised concerns about environmental pollution, toxicity to humans and animals, and development of pesticide-resistant pests. This study evaluated the efficacy of essential oils extracted from Ocimum gratissimum (scent leaf) as organic preservatives for grain storage, comparing their effectiveness to the synthetic preservative dichlorvos. The essential oils were extracted using a suitable method and analyzed for their chemical composition. The major constituents of the essential oils were identified as eugenol, linalool, etc. The oils were then tested for their insecticidal properties against common grain pest (Callosobruchus maculatus). Grains were treated with different concentrations of essential oils (of 0.5, 1.0, 1.5 ml) and dichlorvos (concentration of 0.5, 1.0 mL), and stored for a specified period of one month and data was collected within 4 days of application of treatments. The results showed that the essential oils exhibited significant insecticidal properties, reducing pest growth in grains. The efficacy of the essential oils was comparable to dichlorvos, with 85.0 percent mortality of pests. The study suggests that Ocimum gratissimum essential oils could be a viable alternative to synthetic preservatives like dichlorvos for grain storage, offering a safer and more environmentally friendly option for farmers and consumers. The use of these oils could also contribute to sustainable agriculture and food security. Further research is needed to explore the commercial applications of these essential oils and to optimize their use in grain storage.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.