571 research outputs found

    THE NIGERIAN CRIMINAL JUSTICE SYSTEM’S ABUSE OF CONFESSIONAL STATEMENTS: A CALL FOR JUDICIAL POLICY REFORM

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    The prosecution’s responsibility to prove the guilt of an accused person in Nigeria has, over the years, been watered down by the practice of the police extracting confessional statements from accused persons by extrajudicial means. The courts which are supposed to be the last hope of the common citizen or justice appear to be in synergy with the police in its interpretation and application of relevant provisions of statutes geared towards admissibility of coerced confessional statements. This article is a strident call for a reform of the judicial policy with regards to the admissibility of confessional statements in a manner which would clearly discourage the police from abusing the fundamental rights of accused persons in their bid to score a conviction on a coerced confessional statement. The paper adopted the doctrinal methodology by examining confessional statements in Nigeria through the Evidence Act 2011, the Administration of Criminal Justice Act, and relevant Judicial interpretation. Relevant legal articles and news reports online which deal with confessional statements in Nigeria and detail abuses of fundamental rights of accused persons were referenced to show documented and prevalent police abuses and violation of citizens’ rights. It concludes with recommendations

    Natural selection drives the fine-scale divergence of a coevolutionary arms race involving a long-mouthed weevil and its obligate host plant

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    <p>Abstract</p> <p>Background</p> <p>One of the major recent advances in evolutionary biology is the recognition that evolutionary interactions between species are substantially differentiated among geographic populations. To date, several authors have revealed natural selection pressures mediating the geographically-divergent processes of coevolution. How local, then, is the geographic structuring of natural selection in coevolutionary systems?</p> <p>Results</p> <p>I examined the spatial scale of a "geographic selection mosaic," focusing on a system involving a seed-predatory insect, the camellia weevil (<it>Curculio camelliae</it>), and its host plant, the Japanese camellia (<it>Camellia japonica</it>). In this system, female weevils excavate camellia fruits with their extremely-long mouthparts to lay eggs into seeds, while camellia seeds are protected by thick pericarps. Quantitative evaluation of natural selection demonstrated that thicker camellia pericarps are significantly favored in some, but not all, populations within a small island (Yakushima Island, Japan; diameter ca. 30 km). At the extreme, camellia populations separated by only several kilometers were subject to different selection pressures. Interestingly, in a population with the thickest pericarps, camellia individuals with intermediate pericarp thickness had relatively high fitness when the potential costs of producing thick pericarps were considered. Also importantly, some parameters of the weevil - camellia interaction such as the severity of seed infestation showed clines along temperature, suggesting the effects of climate on the fine-scale geographic differentiation of the coevolutionary processes.</p> <p>Conclusion</p> <p>These results show that natural selection can drive the geographic differentiation of interspecific interactions at surprisingly small spatial scales. Future studies should reveal the evolutionary/ecological outcomes of the "fine scale geographic mosaics" in biological communities.</p

    An Assessment of Property Tax Administration in Edo State, Nigeria

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    ABSTRACTThe mode of administration of property tax determines its buoyancy. The study utilizes key informant method to examine the mode of operation of Edo State Land Use Charge.  The study observes that property tax revenue mobilization in Benin Metropolis is ineffective due to unsystematic tax administration procedure employed by Land Use Charge Department. The study shows that inadequate personnel, public contempt, limited coverage of the tax base and shrouded valuation method are major problems of the Land Use Charge in Benin metropolis. It also reveals that the current property tax administration will not appreciably enhance the internally generated revenue except the mode of operation is reformed. To overcome these challenges it is recommended among others that the implementation of modern and transparent assessment methods for real estate utilizing remote sensing and GIS integrated with computer-assisted mass appraisal (CAMA) be incorporated through a public-involved debate on property tax reform. Modus administrasi pajak properti menentukan daya apung. Penelitian ini menggunakan metode informan kunci untuk memeriksa modus operasi dari Edo Negara Penggunaan Tanah Charge. Penelitian ini mengamati bahwa pajak properti mobilisasi pendapatan di Benin Metropolis tidak efektif karena prosedur administrasi perpajakan sistematis dipekerjakan oleh Penggunaan Tanah Mengisi Department. Studi ini menunjukkan bahwa personil yang tidak memadai, penghinaan publik, cakupan terbatas basis pajak dan metode penilaian diselimuti masalah utama dari Penggunaan Tanah Mengisi di Benin metropolis. Ia juga mengungkapkan bahwa administrasi pajak properti saat ini tidak akan lumayan meningkatkan pendapatan yang dihasilkan secara internal kecuali modus operasi direformasi. Untuk mengatasi tantangan ini dianjurkan antara lain bahwa pelaksanaan metode penilaian modern dan transparan untuk real estate memanfaatkan penginderaan jauh dan GIS terintegrasi dengan komputer-dibantu penilaian massa (CAMA) dimasukkan melalui debat publik-terlibat pada reformasi pajak properti

    Leaf-associated microbiomes of grafted tomato plants

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    Bacteria and fungi form complex communities (microbiomes) in above- and below-ground organs of plants, contributing to hosts’ growth and survival in various ways. Recent studies have suggested that host plant genotypes control, at least partly, plant-associated microbiome compositions. However, we still have limited knowledge of how microbiome structures are determined in/on grafted crop plants, whose above-ground (scion) and below-ground (rootstock) genotypes are different with each other. By using eight varieties of grafted tomato plants, we examined how rootstock genotypes could determine the assembly of leaf endophytic microbes in field conditions. An Illumina sequencing analysis showed that both bacterial and fungal community structures did not significantly differ among tomato plants with different rootstock genotypes: rather, sampling positions in the farmland contributed to microbiome variation in a major way. Nonetheless, a further analysis targeting respective microbial taxa suggested that some bacteria and fungi could be preferentially associated with particular rootstock treatments. Specifically, a bacterium in the genus Deinococcus was found disproportionately from ungrafted tomato individuals. In addition, yeasts in the genus Hannaella occurred frequently on the tomato individuals whose rootstock genotype was “Ganbarune”. Overall, this study suggests to what extent leaf microbiome structures can be affected/unaffected by rootstock genotypes in grafted crop plants

    Synergistic and Offset Effects of Fungal Species Combinations on Plant Performance

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    「1+1=2」じゃない共生の世界 --2種の菌が植物にもたらす相乗効果と相殺効果--. 京都大学プレスリリース. 2021-09-17.In natural and agricultural ecosystems, survival and growth of plants depend substantially on residing microbes in the endosphere and rhizosphere. Although numerous studies have reported the presence of plant-growth promoting bacteria and fungi in below-ground biomes, it remains a major challenge to understand how sets of microbial species positively or negatively affect plants’ performance. By conducting a series of single- and dual-inoculation experiments of 13 plant-associated fungi targeting a Brassicaceae plant species (Brassica rapa var. perviridis), we here systematically evaluated how microbial effects on plants depend on presence/absence of co-occurring microbes. The comparison of single- and dual-inoculation experiments showed that combinations of the fungal isolates with the highest plant-growth promoting effects in single inoculations did not have highly positive impacts on plant performance traits (e.g., shoot dry weight). In contrast, pairs of fungi with small/moderate contributions to plant growth in single-inoculation contexts showed the greatest effects on plants among the 78 fungal pairs examined. These results on the offset and synergistic effects of pairs of microbes suggest that inoculation experiments of single microbial species/isolates can result in the overestimation or underestimation of microbial functions in multi-species contexts. Because keeping single-microbe systems under outdoor conditions is impractical, designing sets of microbes that can maximize performance of crop plants is an important step for the use of microbial functions in sustainable agriculture

    Experimental data from flesh quality assessment and shelf life monitoring of high pressure processed European sea bass (Dicentrarchus labrax) fillets

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    Fresh fish are highly perishable food products and their short shelf-life limits their commercial exploitation and leads to waste, which has a negative impact on aquaculture sustainability. New non-thermal food processing methods, such as high pressure (HP) processing, prolong shelf-life while assuring high food quality. The effect of HP processing (600MPa, 25 °C, 5min) on European sea bass (Dicentrarchus labrax) fillet quality and shelf life was investigated. The data presented comprises microbiome and proteome profiles of control and HP-processed sea bass fillets from 1 to 67 days of isothermal storage at 2 °C. Bacterial diversity was analysed by Illumina high-throughput sequencing of the 16S rRNA gene in pooled DNAs from control or HP-processed fillets after 1, 11 or 67 days and the raw reads were deposited in the NCBI-SRA database with accession number PRJNA517618. Yeast and fungi diversity were analysed by high-throughput sequencing of the internal transcribed spacer (ITS) region for control and HP-processed fillets at the end of storage (11 or 67 days, respectively) and have the SRA accession number PRJNA517779. Quantitative label-free proteomics profiles were analysed by SWATH-MS (Sequential Windowed data independent Acquisition of the Total High-resolution-Mass Spectra) in myofibrillar or sarcoplasmic enriched protein extracts pooled for control or HP-processed fillets after 1, 11 and 67 days of storage. Proteome data was deposited in the ProteomeXchange Consortium via the PRIDE partner repository with the dataset identifiers PXD012737. These data support the findings reported in the associated manuscript "High pressure processing of European sea bass (Dicentrarchus labrax) fillets and tools for flesh quality and shelf life monitoring", Tsironi et al., 2019, JFE 262:83-91, doi.org/10.1016/j.jfoodeng.2019.05.010.FCT (Foundation of Science and Technology) COFASP/0002/2015; Portuguese Foundation for Science and Technology UID/Multi/04326/2019 POCI-01-0145-FEDER007440 UID/NEU/04539/2019info:eu-repo/semantics/publishedVersio

    Factors Influencing Leaf- and Root-Associated Communities of Bacteria and Fungi Across 33 Plant Orders in a Grassland

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    In terrestrial ecosystems, plants interact with diverse taxonomic groups of bacteria and fungi in the phyllosphere and rhizosphere. Although recent studies based on high-throughput DNA sequencing have drastically increased our understanding of plant-associated microbiomes, we still have limited knowledge of how plant species in a species-rich community differ in their leaf and root microbiome compositions. In a cool-temperate semi-natural grassland in Japan, we compared leaf- and root-associated microbiomes across 137 plant species belonging to 33 plant orders. Based on the whole-microbiome inventory data, we analyzed how sampling season as well as the taxonomy, nativeness (native or alien), lifeform (herbaceous or woody), and mycorrhizal type of host plants could contribute to variation in microbiome compositions among co-occurring plant species. The data also allowed us to explore prokaryote and fungal lineages showing preferences for specific host characteristics. The list of microbial taxa showing significant host preferences involved those potentially having some impacts on survival, growth, or environmental resistance of host plants. Overall, this study provides a platform for understanding how plant and microbial communities are linked with each other at the ecosystem level

    Assessment of Geologic Controls of Flooding in Parts of OBIO/AKPOR L.G.A., Rivers State, Nigeria

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    Flooding of Municipal areas is a frequent environmental occurrence in Rivers State that occurs when rainfall runoff meets land surfaces with low water absorbing capacity or when it overwhelms drainage channels. In order to assess the flood situation in the study area, an integrated method which involves field-measurement, geographic information system (GIS),laboratory analysis of soil samples and topographic studies were employed.Digital elevation model of the study area reveals that the flooded areas are situated in areas with elevations lower than its surrounding, thereby acting as a natural basin to retain flood waters after rainfall.Four holes were drilled to depth of 3 m to obtain soil samples at 1 m sampling interval, from which laboratory analysis was carried out to determine some geotechnical parameters such as soil’s particle size, specific gravity, bulk density,porosity,moisture content, permeability and hydraulic conductivity. Results of the analysis show that permeability,hydraulic conductivity and porosity diminishes with respect to depth. The soil in the flooded areas have high fines content (silt and clay), high bulk density which increase with depth and a specific gravity that is typical of organic rich soils that contain sand mixed with a considerable amount of fines. At Nkpolu, mean permeability rates of 0.003 cm/sec, 0.009 cm/sec and 0.033 cm/sec were obtained at 1, 2 and 3 m respectively. At Eneka, mean permeability rates of 0.011 cm/sec,0.018 cm/sec and 0.014 cm/sec were obtained at 1, 2 and 3m respectively,while at Rukpokwu, mean Permeability rates of 0.021 cm/sec was obtained at 1 m, while 0.006 cm/sec was obtained at 2 and 3 m respectively. The mean hydraulic conductivity for the locations under study is of the order of 10-4 ft/day. This study has shown that the flooded areas are located in low lying urban areas which act as basins, therefore, the top soil is crusted with highly compacted soil horizons beneath. With high and frequent rainfall in the region which generates a lot of runoff, in addition to poor drainage system, flooding in the study area occurs frequently.Therefore,construction and maintenance of efficient drainage channels for an effective solution to urban pluvial flooding in the study area are thereby recommended
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