scholarly journals Assessment of Pesticide Residue Levels in common Fruits consumed in Lagos State, Nigeria

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Koleayo Omoyajowo
Keyword(s):  
Pesticide Residue ◽  
Sweet Orange ◽  
Gas Chromatography Mass Spectrometry ◽  
Sampling Location ◽  
Agricultural Produce ◽  
Significant Difference ◽  
Lagos State ◽  
Strict Regulation ◽  
Residue Concentration ◽  
Residue Levels

This study examined pesticide residue levels in three fresh fruit varieties commonly consumed in Lagos state, Nigeria. The fruits (apple, watermelon and sweet orange) were collected from various sale points of fruits in three local government areas; Eti-osa (Ajah), Lagos mainland (Oyingbo) and Ifako-ijaiye (Ifako-Ijaiye). Pesticide residue levels were determined using gas chromatography/mass spectrometry (GC-MS). Data obtained from GC-MS were statistically analysed using graph pad prism 6.0 software and compared with WHO/FAO limits. There was no significant difference (P> 0.05) in each fruits obtained per sampling location. Fruits contained pesticides below WHO/FAO limit except for watermelon that had mean pesticide residue concentration for atrazine (0.088-0.133 mg/kg), clothianidin (0.00 - 0.029 mg/kg), omethoate (0.094 - 0.205 mg/kg) and oxamyloxime (0.088 - 0.125 mg/kg) above WHO/FAO MRLs of 0.02, 0.02, 0.01 and 0.03 mg/kg for atrazine, clothianidin, omethoate and oxamyloxime respectively. The presence of pesticides in these fruits calls for strict regulation of the application of pesticides in farms and preservation chambers. This study recommends further investigation of all agricultural produce in order to circumvent contamination and other problems associated with pesticide accumulation and toxicity.

scholarly journals Assessment of Pesticide Residue Levels in Vegetables sold in some Markets in Lagos State, Nigeria

2017 ◽  
Vol 32 (1) ◽  
pp. 53 ◽  
Author(s):  
K.L. Njoku ◽  
C.V. Ezeh ◽  
F.O. Obidi ◽  
M.O. Akinola
Keyword(s):  
Pesticide Residue ◽  
Lagos State ◽  
Residue Levels

scholarly journals Contribution of Sampling to the Variability of Pesticide Residue Data

2004 ◽  
Vol 87 (6) ◽  
pp. 1368-1379 ◽  
Author(s):  
Árpád Ambrus ◽  
Eugenia Soboleva
Keyword(s):  
Pesticide Residue ◽  
Residue Analysis ◽  
Field Trials ◽  
Medium Size ◽  
Relative Standard ◽  
Significant Difference ◽  
Average Residue ◽  
Combined Uncertainty ◽  
Residue Levels ◽  
Characteristic Features

Abstract The uneven distribution of pesticide residues among the treated objects leads to an inevitable variability of pesticide residue levels measured in the samples, which may significantly contribute to the combined uncertainty of the analytical results. A total of 8844 unit-crop residue data derived from 57 lots and 19 field trials were evaluated to determine the characteristic features of residue distribution in unit crops and composite samples. The average residue levels and the corresponding coefficient of variation (CV) values obtained for individual units taken from a given lot showed wide variation from lot to lot. There was no significant difference between the CVs of residue levels in sample sets of various unit crops or composite sample populations of different sizes taken from various crops. The CV values for levels of residues taken from individual lots followed normal distribution. Very good correlation was found between the CVs of the parent and sample populations. The experimentally obtained values were very close to those expected on the basis of the central limit theorem. The estimated typical relative standard uncertainties of sampling medium-size crops for pesticide residue analysis in the cases of sample sizes of 5, 10, and 25 were 37, 25, and 16%, respectively.

Isolation, morphometry, and culture of Colurella sp. (Rotifera: Ploimida)

2013 ◽  
Vol 1 (2) ◽  
pp. 143
Author(s):  
Petrus P Letsoin ◽  
Henneke Pangkey ◽  
Julius Sampekalo ◽  
Inneke F.M Rumengan ◽  
Stenly Wullur ◽  
...  
Keyword(s):  
Body Size ◽  
Marine Fish ◽  
Fish Larvae ◽  
Nannochloropsis Oculata ◽  
Tropical Fish ◽  
Sampling Location ◽  
Larval Rearing ◽  
Brachionus Rotundiformis ◽  
Marine Fish Larvae ◽  
Significant Difference

The rotifer Brachionus rotundiformis (total body length 240.59±10.24 μm, lorica length 175.28±9.18 μm, and lorica width 124.28±7.76μm) is commonly used as starter food in the larval rearing of marine fish. But, larvae of some marine tropical fish species required starter food with body size smaller than B. rotundiformis. The present study was aimed to isolate minute rotifers from nature and to assess the possibility of culturing these rotifers. Sampling of rotifers was conducted in an estuary of Mangket (Kema-Minut), using plankton net (mesh size 40 µm). A trial of culturing the rotifers was conducted at salinities of 10, 20 and 30 ppt by using a microalga, Nannochloropsis oculata. A species of rotifer identified as Colurella sp. (family Lepadellidae) was successfully isolated from the sampling location. Body size of Colurella sp. was extremely small (Total length 123.22±5.45 μm, lorica length 95.96±3.81 μm, and lorica width 53.57±3.11 μm), which were smaller than Brachionus rotundiformis SS-type as a conventional starter food for marine fish larvae.  Results of culturing the minute rotifer Colurella sp. showed that the species grew well at salinities of 10, 20 and 30 ppt with no significant difference among treatments (ANOVA, p>0.05), indicating a potential use of minute rotifer Colurellasp. as starter food for marine fish larvae. Rotifera Branchionus rotundiformis (ukuran tubuh: panjang total 240,59±10,24 μm, panjang lorika 175,28±9,18 μm, dan lebar lorika 124,28±7,76μm) sering digunakan sebagai pakan awal pemeliharaan larva ikan laut. Namun, larva beberapa spesis ikan laut tropis membutuhkan pakan awal berukuran tubuh lebih kecil dari Branchionus rotundiformis. Penelitian ini bertujuan untuk mendapatkan minute rotifer dari alam (berukuran tubuh lebih kecil dari B. rotundiformis) dan menguji kemungkinan pemeliharaannya. Sampling rotifer dilakukan di perairan estuari Desa Mangket (Kema-Minut), menggunakan plankton net (ukuran mata jaring 40 µm). Uji coba pemeliharaan dilakukan pada salinitas (10, 20, dan 30 ppt) dengan menggunakan Nannochloropsis oculata. Satu spesies minute rotifer yang teridentifikasi sebagai Colurella sp. (family Lepadellidae) berhasil diisolasi dari lokasi sampling. Colurella sp. memiliki ukuran tubuh sangat kecil (panjang total [PT] 123,22±5,45 µm, panjang lorika [PL] 95,96±3,81 µm, dan lebar lorik [LL] 53,57±3,11 µm) yang mana lebih kecil dari Branchionus rotundiformis tipe-SS sebagai pakan awal larva ikan laut. Hasil uji coba pemeliharaan minute rotifer Colurella sp. menunjukkan bahwa spesis ini dapat tumbuh pada salinitas 10, 20, dan 30 ppt dengan perbedaan kepadatan populasi yang tidak signifikan antar perlakuan (Uji ANOVA, p > 0.05) mengindikasikan potensi pemanfaatan minute rotifer Colurella sp. sebagai pakan awal larva ikan laut.

scholarly journals Heavy metal levels in cattle egrets (Bubulcus ibis) foraging in some abattoirs in Lagos State metropolis

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Elijah Abakpa Adegbe ◽  
Oluwaseyi Oluwabukola Babajide ◽  
Lois Riyo Maina ◽  
Shola Elijah Adeniji
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Accumulation ◽  
Heavy Metal Contamination ◽  
Heavy Metal Accumulation ◽  
Bubulcus Ibis ◽  
Significant Difference ◽  
Metal Levels ◽  
Lagos State ◽  
The Mean

Abstract Background Heavy metal accumulation in the ecosystem constitutes a potential toxic effect which is hazardous to human health. Increasing environmental pollution has necessitated the use of cattle egrets to evaluate the levels of heavy metal contamination, to establish their use in biomonitoring of heavy metals and to provide data for monitoring pollution in the environment. Results The present study assessed the utilization of Bubulcus ibis in monitoring pollution in five abattoirs, namely Agege, Bariga, Kara, Itire and Idi-Araba, all situated in Lagos State. The concentration of five (5) heavy metals, cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) was determined in the liver, muscle and feather of Bubulcus ibis using the atomic absorption spectrophotometer. The trend of metal accumulation was in the order: Zn > Cu > Pb > Cd > Ni for all the sampled tissues. The mean tissue concentrations of the metals were significantly different (p < 0.05) among the sites. The highest levels of metal concentration were reported in the liver in all the locations. Mean concentration of Cd in Kara (0.003 ± 0.00058) was significantly (p < 0.05) higher than those found at Agege (0.0013 ± 0.00058) and Idi-Araba (0.001 ± 0.001). A significant difference (p < 0.05) was also observed between the mean concentrations of Cu in Bariga (0.01 ± 0.001) and Idi-Araba (0.003 ± 0.001). Conclusion All the studied heavy metals were present in the liver, muscle and feathers of the cattle egrets. The contamination levels were ascertained from the study which indicated that cattle egrets are useful in biomonitoring studies and the generated data will serve as baseline data which could be compared with data from other locations for monitoring heavy metal pollution.

scholarly journals EFFECTS OF SELF-EFFICACY ON SELF- EMPLOYMENT INTENTION OF RECENT GRADUATES IN NIGERIA

2020 ◽  
Vol 2 (1) ◽  
pp. 158-171
Author(s):  
Abimbola Foluso OJAPINWA,
Keyword(s):  
Local Government ◽  
Self Efficacy ◽  
Sampling Technique ◽  
The Self ◽  
Job Seekers ◽  
Self Employment ◽  
Significant Difference ◽  
Lagos State ◽  
Recent Graduates ◽  
The Government

This study investigated the effect of self-efficacy on self-employment intentions of recent graduates. Using the descriptive survey research design, the study population includes National Youth Service Corps (NYSC) members of Ojo Local Government area of Lagos state. A sample of 130 was selected using the purposive sampling technique. The formulated hypotheses were tested using the simple linear regression and the independent sample t-test. The results showed that there was a statistically significant influence of self-efficacy on self-employment intention of Corps members of Ojo local government, Lagos state. A significant regression coefficient was found F (1.128)=29.72, p<.05), with R2 of .19. This presupposes that19.0% of the variance in self-employment intentions is as a result of the self-efficacy of recent graduates. Also, a statistically significant difference in the self-employment intentions were found between male and female corps members (tcal(128) = 2.11 is greater than ttab=1.98, p < .05). The study therefore recommended, amongst others, that institutions and the government should educate and devise a means by which they can increase the level of graduates and students’ self-efficacy which in turn will help shape their intention towards shaping career options after graduation. Similarly, effective entrepreneurship education and training for students and graduates to enhance their efficacy in performing specific tasks and roles of an entrepreneur will go a long way in boosting their self-employment intention and also aids them towards post graduate job creation ability rather than job seekers

scholarly journals Nutritional evaluation of sweet orange citrus sinensis seed oil

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Nwozo Sarah O ◽  
Omotayo Opeoluwa O ◽  
Nwawuba Stanley U
Keyword(s):  
Citrus Sinensis ◽  
Glutaric Acid ◽  
Seed Oil ◽  
Sweet Orange ◽  
Ash Content ◽  
Gas Chromatography Mass Spectrometry ◽  
Crude Fibre ◽  
The Family ◽  
Safe Limit ◽  
Nutritional Benefits

Highlighting the nutritional benefit of oil gleaned from the seed of sweet orange Citrus sinensis has become necessary; owing to the fact that the seed is predominantly considered a waste. Therefore, the aim of the present study was to investigate the nutritional benefits of oil extracted from the seed of sweet orange Citrus sinensis of the family; Rutaceae, and order; Sapindales. A total of 2.0 kg of coarsely crushed seeds were immersed in 15 liters of n-hexane for 72 hours in batches with intermittent vigorous shaking and the oil was further extracted using a soxhlet extractor. Other procedures for analysis were performed using standard methods. The result revealed that, the anti-nutrients levels were found to be within the safe limit, vitamin and minerals fell within the daily recommended intake limit. The proximate composition of Citrus sinensis seeds oil revealed that the oil contains; Protein 1.560±0.120, Moisture content 4.636±0.153, Fat 89.810±0.282, Ash content 1.776±0.161, Crude fibre 0.619±0.052 and Carbohydrate 1.614±0.036. Gas Chromatography-Mass Spectrometry (GC-MS) analysis revealed the presence of the following fatty acid compounds; Linoleic acid 37.644%, Palmitic acid 28.051%, Isopropyl linoleate 12.699%, Pentadecanoic acid 9.652%, Stearic acid 5.839%, Butyl linoleate 2.867, and Glutaric acid 2.616%. Therefore, indicating that, the oil extracted from sweet orange Citrus sinensis seeds it’s an excellent choice for both nutritional and industrial purposes.

Enhanced surveillance for covid-19 response in Lagos State, Nigeria: lessons learnt, 2020 (Preprint)

2021 ◽  
Author(s):  
Gregory Chukwuemeka Umeh ◽  
Khalid Abubakar ◽  
Peter Akinmusire ◽  
Adamu M. Isa ◽  
Aminu Zauro ◽  
...  
Keyword(s):  
Service Industry ◽  
Respiratory Infections ◽  
Health Facilities ◽  
Acute Respiratory Infections ◽  
Surveillance Strategy ◽  
Active Case ◽  
Governmental Organizations ◽  
Significant Difference ◽  
Lagos State ◽  
The Impact

BACKGROUND The SARS-CoV-2, the novel virus which causes the coronavirus disease (COVID-19), has changed the world. No aspect of humanity is untouched from health, aviation, service industry, politics, economy, education, and entertainment to social and personal lives, since the outbreak of influenza-like illness in Wuhan, China, in December 2019. The Lagos State COVID-19 response team deployed enhanced surveillance through Active Case Search (ACS) for Acute Respiratory Infections (ARI) at health facilities and communities in the 20 Local Government Areas (LGAs) of Lagos State. Lagos State was the first state in Nigeria to deploy this specific surveillance strategy for Nigeria’s COVID-19 response. OBJECTIVE We documented the methods, findings, and review of the active case search for acute respiratory infections, part of COVID-19 response in 20 LGAs of Lagos State, between 1st April and 15th May 2020. METHODS We utilized descriptive and quantitative approaches to describe and assess the impact of the Active Case Search (ACS) for Acute Respiratory Infections (ARI) in health facilities and communities in 20 LGAs of Lagos State between 1st April and 15th May 2020. RESULTS We found a significant difference in mean scores of suspected COVID-19 cases (M=60, SD=109, before ACS for ARI compared to M=568, SD=732, after ACS for ARI, P=0.0039), confirmed cases (M=10, SD=19, before ACS for ARI compared to M=144, SD=187, after ACS for ARI, P=0.0028) and contacts (M=56, SD=116, before ACS for ARI compared to M=152, SD=177, after ACS for ARI, P=0.044) before and after ACS for ARI in 20 LGAs of Lagos State, between 1st April and 15th May 2020. CONCLUSIONS The deployment of the Lagos State government’s polio-eradication structure for the COVID-19 response is both innovative and effective. The response to COVID-19 requires robust surveillance, credible and timely communication, collaboration, coordination among government, inter-governmental organizations (e.g., WHO), non-governmental organizations, and citizens to succeed and limit the medical, economic, social, and personal losses to the COVID-19 pandemic.

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