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    Wyświetlanie 1-8 z 8
    Tytuł:
    Palynological Study of Recent Sediments from an Urban Creek in Lagos State, Southwestern Nigeria
    Autorzy:
    Ajikah, Linus
    Adekanmbi, Olusola
    Durugbo, Ernest
    Ogundipe, Oluwatoyin
    Powiązania:
    https://bibliotekanauki.pl/articles/1076688.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Ijora Creek
    Paleovegetation
    Palynomorphs
    Southwestern Nigeria
    Opis:
    A palynological study of recent sediments from Ijora Creek, an Urban Creek in Lagos, Southwestern Nigeria was carried out to provide inferences on paleovegetation and climate change over time in the study area. Two stations 90m apart were sampled at low tide in a boat using a Russian peat corer. Samples were taken at 10cm intervals and eighteen sediments samples were collected and processed using standard palynological methods. Two hundred and sixty six (266) and two hundred and thirty three (231) palynomorphs were recovered from stations 1 and 2 respectively. Palynomorphs recovered and identified to species level include Alchornea cordifolia, Hymenocardia acida, Elaeis guineensis, Spathodea companulata, Triumfetta pentandra, Uapaca acuminata, Tridax procumbens, Berlinia sp., Eugenia sp., Celtis sp., Albizia sp., Cyperus sp. together with species of Poaceae, Asteraceae, Arecaceae, Eurphorbiaceae, Acanthaceae, with common microforaminiferal test linings and fungal spores. Poaceae and fungal spores dominated the assemblage while station 1 recorded the highest pollen and spore abundance. The presence of microforaminiferal wall linings, fungal spores and the freshwater swamp species Alchornea cordifolia and the oil palm pollen Elaeis guineensis suggests a dominantly wet period in which, there was a marked marine transgression into the creek, interrupted occasionally by dry climate as inferred from the abundant records of Poaceae and Asteraceae. The presence of secondary forest species especially Elaeis guineensis suggests the impact of human activities on the paleovegetation.
    Źródło:
    World News of Natural Sciences; 2019, 25; 168-187
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Total Phenolic Content and Some Selected Metals in Extracts of Moringa oleifera, Cassia tora, Ocimum gratissimum, Vernonia baldwinii and Telfairia occidentalis Plant Leaves
    Autorzy:
    Louis, H.
    Maitera, O. N.
    Boro, G.
    Barminas, J. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1114032.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Nigeria herbs
    Phenol
    antioxidant
    diets
    metals
    plants
    Opis:
    The main objective of this research is to determine the content of metals (Ca, Cu, Fe, Mg and Zn) and total phenols in different plant extracts of Moringa oleifera, Cassia tora, Ocimum gratissimum, Vernonia baldwinii and Telfairia occidentalis. Content were determined using Atomic Absorption Spectroscopy. The result indicate that Moringa oleifera plant extracts range from 0.25 ±0.00 to 6.13 ±0.30 mg/kg, Cassia tora plant extracts - 0.17 ±0.03 to 7.48 ±0.06 mg/kg, Ocimum gratissimum plant extracts - 0.18 ±0.00 to 5.43 ±0.12 mg/kg, Vernonia baldwinii and Telfairia occidentalis plant extracts - 0.21 ±0.03 to 7.86 ±0.12 mg/kg and 0.17 ±0.00 to 4.52 ±0.06 mg/kg, respectively. The results also revealed a lower abundance of heavy metals. The total phenolic content was determined using the modified Folin-Ciocalteu method. Herein, the phenolic content in Moringa oleifera was 8.50 ±1.23 mg Garlic Acid Equivalent g-1 (mg GAE g-1), Cassia tora - 30.00 ±0.00 mg GAE g-1, Ocimum gratissimum - 45.00 ±1.41 mg GAE g-1 , Vernonia baldwinii - 49.00 ±1.14 mg GAE g-1 and Telfairia occidentalis - 46.6 7 ±0.27 mg GAE g-1. We found the lowest total phenol content in Moringa oleifera. This also possessed high chelating activity. In contrast, Vernonia baldwinii contained the highest total phenol content, but had low chelating activity. The plant extracts with high levels of phenolic compounds exhibited good antioxidant activity.
    Źródło:
    World News of Natural Sciences; 2017, 11; 11-18
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A holistic review of heavy metals in water and soil in Ebonyi SE, Nigeria; with emphasis on its effects on human, plants and aquatic organisms
    Autorzy:
    Eyankware, Moses Oghenenyoreme
    Obasi, Philip Njoku
    Powiązania:
    https://bibliotekanauki.pl/articles/1840786.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Heavy Metal
    Water
    Soil
    Human
    Uptake
    Nigeria
    Opis:
    A comprehensive review of literature was carried out to evaluate the presence of heavy metals (HMs), with a view to study its effect on man, plants and aquatic organisms in Ebonyi State, southeastern Nigeria. From reviewed literature it was observed that the major source of HM in soil and water can be attributed to anthropogenic activities such as mining and quarrying. Geogenic activities were also implicated by some scholars. Detail analysis showed that 62 % of HMs in water and soil is attributed to mining, while 23 % is attributed to indiscriminate waste disposal, and 15 % is due of other human and geogenic activities. The accumulation of HMs in plants, soil and water poses a serious risk to human, plants and aquatic organisms within the study area. The occurrence of HMs in soil and water if not properly monitored may tend to increase in years to come and this may have negative impact on plants and aquatic organisms. Severe health effects of humans are inevitable. Therefore, constant re-evaluating of HM in water and soil in the area is highly required.
    Źródło:
    World News of Natural Sciences; 2021, 38; 1-19
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on Cultivation of Indigenous Mushrooms in South Eastern Nigeria
    Autorzy:
    Okigbo, R. N.
    Ezebo, R. O.
    Nwatu, C. M.
    Omumuabuike, J. N.
    Esimai, G. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031303.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Nigeria
    Plantain Leaves
    Pleurotus tuberregium
    Volvariella volvacea
    agro wastes
    Opis:
    Studies were carried out to investigate cultivation of some indigenous edible mushrooms in Anambra State. The most suitable substrates for cultivation of Pleurotus tuberregium and Volvariella volvacea were also investigated. Spawn of V. volvacea was obtained from the Department of Life Science, University of Benin, Edo State and sclerotia of P. Tuberregium purchased from Eke Awka Market, Anambra State were used for this study. Plantain leaves and oil palm bunch wastes were substrates employed for V. volvacea whereas topsoil was used for P. tuberregium cultivation. The methods used were site preparation, substrate preparation, soil preparation, sclerotia preparation, cultivation of sclerotia, irrigation, spawn cultivation and harvesting of mushrooms. Means were analyzed statistically using (ANOVA) to test for significance. Means were separated using Duncan’s Multiple Range Tests (DMRT).The highest number of fruit bodies of V. volvacea, 312.68 was obtained from plantain leaves on day 2 after primordial emergence whereas the least, 21.00 was recorded from oil palm bunch wastes on days 6 and 14, respectively. The highest number of P. tuberregium, 61.58 was recorded on day 12 after primordial emergence while the least, 20.49 was recorded on days 7, 13 and 14, respectively. All the three substrates utilized for cultivation of mushrooms in this study supported their growth and development. Plantain leaves supported fast colonization and produced high yield fruit bodies of V. volvacea. The ability to use agricultural wastes for cultivation of mushrooms will boost food production for ever increasing population.
    Źródło:
    World News of Natural Sciences; 2021, 34; 154-164
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contamination and Dietary Intake Risks Assessment of Heavy Metals in Some Species of Wild Edible Mushrooms Grown in Southern Nigeria
    Autorzy:
    Nwokeke, Uche G.
    Enyoh, Christian Ebere
    Powiązania:
    https://bibliotekanauki.pl/articles/1839727.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bioaccumulation
    Hazard qoutient
    Mineralization
    Mushroom fruiting body Nigeria
    Trace elements
    Opis:
    In this study, wild edible mushroom collected from Rivers and Imo state Nigeria were evaluated for heavy metals and dietary intake risks assessment. Four species of edible mushrooms were collected each in Imo (Lentinus squarrosulus, Pleurotus ostreatus, Lenziles betulina and Grifola polypilus frondosa) and River state (Lentinus squarrosulus, Pleurotus tuber-regium, Lenziles betulina, Auricularia aurucula) and metals extracted using HNO3 before analysis using flame atomic absorption spectrometry (F-AAS) in Varian AA 240 FS apparatus. Results showed that all metals showed concentrations lower than the permissible limits of World Health Organization (WHO) and Food and Agricultural Organization (FAO) while Pb was not detected in all samples analyzed and Cd in samples collected from Rivers state. However, Cd was only detected (0.003 mg/kg) in one sample (Lenziles betulina) collected from Imo state. Fe exceeded recommended values in Lentinus squarrosulus, Pleurotus ostreatus and Lenziles betulina in Imo State. Bioaccumulation factors for all mushrooms were generally low (< 3). However, the potential tolerable weekly intake and target hazard quotient values for the four mushroom species were usually extremely low except for Fe (2.24) in Lenziles betulina. Consumption of mushrooms from these areas might pose no potential risk in terms of heavy metals except for Fe content in Lenziles betulina from Rivers state. However, in general, it can be concluded that the consumption of the studied mushroom species from all sites does not present any health risk arising from their regular consumption.
    Źródło:
    World News of Natural Sciences; 2021, 39; 1-10
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing the Potential Health Effect of Solid Waste Dump Site Located Close to Residential Areas in Jalingo, Taraba State Using Geospatial Techniques
    Autorzy:
    Tukura, Ejati D.
    Ojeh, Vincent Nduka
    Philip, Anita H.
    Ayuba, Amina
    Powiązania:
    https://bibliotekanauki.pl/articles/1109618.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Jalingo
    Nigeria
    Potential Health Effect
    RS/GIS Approach
    Solid Waste
    Opis:
    The study examined the application of Remote Sensing and Geographic Information Systems in estimating the potential health effects of solid waste dump sites located close to residences within Jalingo town, in mapping out the existing dumpsites, in carrying out proximity analysis and in assessing the impact of these dump sites on residences within the study area. Both primary and secondary data were used to achieve the objectives of the study. The primary data were the geographical coordinates of all the dumpsites from the selected five wards in the study area. This was obtained using hand held GPS. The secondary data applied included administrative boundary maps (Ancillary data) and recorded cases of malaria incidence from health facilities located in the area. Data were analyzed in ArcGIS 10.3 environment to display the X and Y coordinates and to obtain the spatial distribution of the dumpsites on a composites map. Geo-processing using ring buffering was carried out to form a proximity analysis of the dumpsites. Assessment of the impact of the dumpsites on the health of dwellers within the study area was achieved from a proximity analysis that compared location with the recorded cases of malaria. The findings of the study revealed that proximity analysis of a 500m and 1000m standard demonstrated that residences within 7.857 km2 and 31.439 km2 of each dumpsite, respectively, are in danger of dumpsite related disease. This is because out of the total built-up area of 61.479 km2 in the study area; most of the dumpsites located within 31.439 km2 of the built-up area do not conform to the NESREA standard criteria of siting a dumpsite. The assessment of the cases of malaria incidence recorded and the numbers of dumpsites revealed that dumpsites location close to residence had more cases of malaria incidence, thus it is believed that the dumpsites contribute to the breeding the female anopheles mosquito that transmit malaria to humans. The study recommends dumpsite location suitability analysis be performed in Jalingo and that to avoid endemic Malaria, the appropriate authorities close down dumpsites close to residences.
    Źródło:
    World News of Natural Sciences; 2018, 20; 160-175
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Medicinal Plants Used to Treat Sexual Diseases by Ogba/Egbema/Ndoni Ethnics of Rivers State, Nigeria
    Autorzy:
    Oladele, A. T.
    Elem, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112683.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Medicinal plants
    Nigeria
    Ogba/Egbema/Ndoni ethnics
    indigenous knowledge
    reproductive diseases
    Opis:
    In our study, an inventory was carried out of plants used in managing sexual diseases by Ogba/Egbema/Ndoni tribal people in Rivers State, Nigeria. Ten (10) communities (Kreigani, Odugili, Oboh, Agah, Obakata, Obirikom, Ndoni, Agwe, Egbema and Omoku) were randomly selected within the ethnic clan for the study. Structured pre-tested questionnaires were then administered among Traditional Medicine Practitioners (TMPs), Traditional Birth Attendants (TBAs), herb vendors and knowledgeable individuals. In all, 111 randomly selected informants were interviewed. The collected data was analysed using descriptive statistics and utilization tables. Accordingly, males constituted 50.5% and females 49.5% of the studied population, and a majority of the respondent were subsistent farmers (50.5%), petty traders (22.5%), TBAs (10.8%), TMPs (9.9%) and herb vendors (0.9%). Prevalent health conditions were categorized into twelve areas (miscarriage, menstrual disorder, hernia and weak erection, among others). As a result of the work, taxonomic diversity showed 119 medicinal plants species, belonging to 47 families and 71 genera. Most cited plant families were Malvaceae (7 species) and Fabaceae (6 species). The plant parts that were mostly used were the leaves (52.28 %), roots (37.54 %) and barks (3.86%). This study shows that rural inhabitants still rely on traditional medicine for health care needs, and that many of the medicinal plants should undergo research for future drug development and conservation.
    Źródło:
    World News of Natural Sciences; 2018, 17; 16-38
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantitative analysis of physical and chemical attribute of soil around power-line dumpsite at Boji-Boji Owa, Delta State, Nigeria
    Autorzy:
    Ulakpa, Ruth Oghenerukevwe Eyankware
    Ulakpa, Wisdom Chukwuemeke
    Eyankware, Moses Oghenenyoreme
    Powiązania:
    https://bibliotekanauki.pl/articles/1031480.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Boji-Boji Owa
    Cation exchange capacity
    Delta State
    Exchangeable cation
    Nigeria
    Solid waste
    dumpsite
    Opis:
    The study ascertains some physiochemical properties of soils around Power-line dumpsite at Boji-Boji Owa, Delta State, Nigeria. In order to evaluate the effects of municipal solid waste dumpsites on soils, soil samples were collected with the aid of a graduated soil auger at depths of 0 – 10 cm, 15 – 25 cm and 25 – 40 cm, representing top to sub and bottom soil sand also 500 m away from dumpsites which serves as control site (R). Samples were taken for laboratory analyses to determine the level of physiochemical properties such as: pH, grain size distribution, Electrical Conductivity (Ec), Organic Carbon (OC), Organic Matter (OM), Available Phosphorous (Av. P), Overall Nitrogen (ON), Basic Cations and Cation Exchange Capacity (CEC) in soils. Results obtained from the study, revealed that values between waste dumpsite and control site were significantly different. Findings showed that the pH value in sampled soils from studied dumpsites ranged from 6.22±0.06 and 7.97±0.04 while the mean pH value for controlled site was 39.8±0.08. The increase in the pH value of the sampled soil indicated an increase in CEC mean value of soil which ranged from 4.73±0.30 and 10.28±0.46 mEq/100 g while a low pH indicated low CEC mean value of 1.50±0.22 mEq/100 g. This is because there exists a positively significant relationship between pH, OC, OM, Av.P, ON, basic cations and CEC. As Ec varied between 692±4.50 to 918±4.03 μScm-1, OC varied between 0.05±0.00 to 0.64±0.03%, OM varied between 0.10±0.06 to 0.57±0.07%, Av.P varied between 8.98±0.06 to 25.36±0.22 mg/kg and ON varied between 0.44±0.01 to 0.93±0.03% across all studied dumpsites.
    Źródło:
    World News of Natural Sciences; 2021, 35; 118-134
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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