scholarly journals Death in the Mouth: The Current Status of Pesticide Residues in Cured Fish from Selected Markets in Rivers State Nigeria

2020 ◽  
Vol 5 (1) ◽  
pp. 14-22
Author(s):  
Bob-Manuel R.B ◽  
Egbecho E ◽  
Zakka U
Keyword(s):  
Pesticide Residues ◽  
Current Status ◽  
Rivers State

scholarly journals Seasonal Emergence and Historical Contaminant Exposure of Cave Myotis (Myotis velifer) in Central Texas and Current Status of the Population

Environments ◽  
2019 ◽  
Vol 6 (12) ◽  
pp. 121
Author(s):  
Tarisha A. Land ◽  
Donald R. Clark ◽  
Charles E. Pekins ◽  
Thomas E. Lacher
Keyword(s):  
Pesticide Residues ◽  
Insect Pests ◽  
Current Status ◽  
Contaminant Exposure ◽  
Fort Hood ◽  
Emergence Patterns ◽  
Myotis Myotis ◽  
Central Texas ◽  
History Of ◽  
Lactating Females

We examined the emergence patterns of Myotis velifer in central Texas in 2000 and assessed exposure to pesticide residues. We collected and analyzed guano from three caves for pesticide residues. In addition, bat carcasses were sampled from an active colony of cave myotis (Myotis velifer) in Shell Mountain. Organochlorine residue concentrations were highest in guano from the Egypt and Tippit Caves, whereas organophosphate concentrations were highest in Shell Mountain guano. Residue concentrations of organochlorines and metals in guano and carcasses collected from the three caves are considered low and probably of no biological concern. The study was one of very few to demonstrate the presence of OPs, including 18 different detectable compounds in the two most recent samples of bat guano. Comparisons between spring and fall guano samples from Shell Mountain suggest that HCB (hexachlorobenzene), total chlordanes, dieldrin, endrin, endosulfan II, p,p’-DDE (Dichloro-2,2-bis(p-chlorophenyl) ethylene), and o,p’-DDT (Dichlorodiphenyltrichloroethane) accumulated while bats were absent from the caves at Fort Hood. Lindane appeared to be the only chemical that increased while the bats were present at the site. Organochlorine concentrations in carcasses were generally lowest in lactating females and higher in nursing juveniles. The pattern of emergence coincides with the peak of agricultural activities, therefore, bats forage at a time when the insect pests are most abundant, but also potential to exposure to agricultural chemicals is highest. The current status of the population, however, remains stable in spite of the history of exposure.

Methods for monitoring of pesticide residues in water: current status and recent trends

2012 ◽  
Vol 66 (5) ◽  
pp. 965-975 ◽  
Author(s):  
Tatjana Vasiljević ◽  
Nikolina Dujaković ◽  
Marina Radišić ◽  
Svetlana Grujić ◽  
Mila Laušević ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Pesticide Residues ◽  
Current Status ◽  
Water Current ◽  
Environmental Waters ◽  
Recent Developments ◽  
Recent Trends

An overview of analytical methods currently used for the determination of pesticide residues in water samples is presented. As liquid chromatography and gas chromatography, coupled to mass spectrometry, are considered to be the most appropriate techniques for determination of pesticides in environmental waters, the most recent developments and applications in this field are discussed, as well as the extraction procedures employed for analyte isolation and preconcentration.

Environmental Sustainability and Regulation in Rivers State, Nigeria

2020 ◽  
Vol 4 (1) ◽  
pp. 71-96
Author(s):  
Ibibia Lucky Worika ◽  
Uzuazo Etemire
Keyword(s):  
Environmental Sustainability ◽  
Niger Delta ◽  
Regulatory System ◽  
The State ◽  
Current Status ◽  
Specific Reference ◽  
Environmental Laws ◽  
Healthy Environment ◽  
Rivers State

Abstract Over the years, the overall quality of the environment in Rivers State, in the Niger Delta of Nigeria, has taken a significant downturn, which has attracted both national and international attention. This situation, among other things, raises questions about the quality of environmental laws and institutions in the state, with respect to their capacity to promote environmental sustainability. This article seeks to unravel this question. The analysis, with specific reference to certain standards, broadly reveals that on the whole, the current status and quality of environmental laws and institutions in Rivers State are largely incapable of ensuring environmental sustainability in the state, in terms of securing a healthy environment conducive to human wellbeing and development. Against this backdrop, recommendations are made regarding extensive law review/revision, the faithful implementation of improved laws, and the proper allocation and employment of adequate material and human resources with a view to strengthening the environmental regulatory system of Rivers State.

scholarly journals Assessment of Level of Susceptibility of Anopheles gambiae S.L to Public Health Insecticides in a Malaria Vector Sentinel Site, Rivers State, Nigeria

2019 ◽  
pp. 1-10
Author(s):  
N. Ebere ◽  
I. Atting ◽  
I. Ekerette ◽  
A. Nioking
Keyword(s):  
Anopheles Gambiae ◽  
Malaria Vector ◽  
Indoor Residual Spraying ◽  
Current Status ◽  
Sentinel Site ◽  
Malaria Surveillance ◽  
Anopheles Mosquitoes ◽  
Surveillance Site ◽  
The Status ◽  
Rivers State

Aims: To investigate the status of susceptibility of Anopheles gambiae sensu lato (Diptera: Culicidae) mosquitoes to the WHO-approved insecticides for indoor residual spraying  in field collected samples in a malaria vector sentinel site in Nigeria and Ts to provide an update on the current status of resistance to the major insecticide classes in wild populations of Anopheles gambiae sensu lato Study Design: Field and laboratory –experimental design was used in this study. Place and Duration of the Study: The study was carried out at a malaria surveillance site, established by the National Malaria Elimination Programme at Oduoha-Emohua in Rivers State, between April to September, 2015.  Methodology: Anopheles larvae were collected from stagnant pools around the malaria surveillance site. The mosquitoes were reared to adulthood in the insectary and identified using morphological keys. Two- to three-day old adult female mosquitoes were exposed to standard diagnostic doses of Deltamethrin, Lambdacyhalothrin, Alphacympermethrin, Permethrin, Bendiocarb, Propoxur, DDT and   Premiphos-Methyl using standard WHO protocols, insecticide susceptibility test kits and treated papers. Knockdown every 10 min and mortality 24 h post exposure was noted. All Anopheles mosquitoes tested belonged to the Anopheles gambiae-complex. Results: Mortality results indicated that the vectors were susceptible to Bendiocarb and Alphacympermethrin with mortality rates of 100% and 98% respectively. There was complete resistance to Deltamethrin, Lambdacyhalothrin, Permethrin, Propoxur, DDT and Premiphos-Methyl with mortality ranges of 25%-65%. Conclusion: The present study shows the effectiveness of Bendiocarb and Alphacympermethrin in malaria control with indoor residual spraying. It also provides baseline information for monitoring the status of insecticide resistance in Rivers State.

Current status of special planetary and lunar theories and ephemerides

1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe
Keyword(s):  
Observational Data ◽  
Current Status ◽  
Numerical Errors

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Electron-deficient boron-based catalysts for C–H bond functionalisation

2021 ◽  
Author(s):  
Yuanhong Ma ◽  
Shao-Jie Lou ◽  
Zhaomin Hou
Keyword(s):  
Review Article ◽  
Current Status ◽  
Comprehensive Overview

This review article provides a comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C–H functionalisations.

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