检索结果-南通市图书馆

AtzABC Catabolic Gene Probe from Novel Atrazine-Degrading Rhodococcus Strain Isolated from a Nigerian Agricultural Soil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Microbiology 2012年第4期2卷 593-597页

作者： Ahmed Faruk Umar Fatimah Tahir Michael J. Larkin Olubukola Mojisola Oyawoye balarabe lawal musa Mohammed Bello Yerima Ediga Bede Agbo Biological Sciences Programme Abubakar Tafawa Balewa University Bauchi Nigeria Microbiology Department Usmanu Dan Fodio University Sokoto Nigeria Queens University Environmental and Genomic Research (QUESTOR) Center Queens University of Belfast Belfast Northern Ireland UK

A batch enrichment technique was used to isolate atrazine-degrading Rhodococcus sp strain from an agricultural land with history of atrazine application in Bauchi state, Northeastern Nigeria. The strain was identified on the basis of physiological, biochemical and 16S r RNA gene sequencing. Growth studies and HPLC analysis showed that the strain has potential of atrazine degradation. An investigation into the catabolic genes Atz ABC, which transform atrazine to cyanuric acid, confirms the chromosomal DNA of strain to harbor BC genes, as compared with the positive control, Rhodococcus jostii RHA1. The strain does not possess the Atz A in all catabolic gene probe carried out. The isolation and characterization of the Rhodococcus sp strain showed that catabolic genes may have evolved from a single origin with widespread global distribution, with possible potential in atrazine bioremediation.

关键词： Enrichment Catabolic Genes Bioremediation Atrazine

Blast-induced ground vibration prediction in granite quarries:An application of gene expression programming,ANFIS,and sine cosine algorithm optimized ANN

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2021年第2期31卷 265-277页

作者： Abiodun Ismail lawal Sangki Kwon Olaide Sakiru Hammed musa Adebayo Idris Department of Energy Resources Engineering Inha UniversityIncheon 22212Republic of Korea Department of Mining Engineering Federal University of TechnologyAkureNigeria Department of Physics Federal UniversityOye-EkitiNigeria Division of Mining and Geotechnical Engineering Department of CivilEnvironmental and Natural Resources EngineeringLuleåUniversity of Technology97187 LuleåSweden

Blasting of rocks has intrinsic environmental impacts such as ground vibration,which can interfere with the safety of lives and ***,accurate prediction of the environmental impacts of blasting is imperative as the empirical models are not accurate as evident in the ***,there is need to consider some robust predictive models for accurate prediction *** expression programming(GEP),adaptive neuro-fuzzy inference system(ANFIS),and sine cosine algorithm optimized artificial neural network(SCA-ANN)models are proposed for predicting the blast-initiated ground vibration in five granite *** input parameters into the models are the distance from the point of blasting to the point of measurement(D),the weight of charge per delay(W),rock density(q),and the Schmidt rebound hardness(SRH)value while peak particle velocity(PPV)is the targeted output.100 datasets were used in developing the proposed *** performance of the proposed models was examined using the coefficient of determination(R2)and error *** R2 values obtained for the GEP,ANFIS,and SCA-ANN models are 0.989,0.997,and 0.999,respectively,while their errors are close to *** proposed models are compared with an empirical model and are found to outperform the empirical model.

关键词： Artificial intelligence Blasting Rock density Comminution Environmental impacts Sensitivity analysis

Seasonal Quality Assessment of Agricultural Soils along the Bank of Tungan Kawo Dam, Kontagora, Nigeria

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Agricultural Chemistry and Environment 2016年第3期5卷 132-151页

作者： musa Sabo Abdullahi Adamu Uzairu Oluwole Joshua Okunola Muhammad lawal balarabe Department of Chemistry Ahmadu Bello University Zaria Nigeria Department of Applied Chemistry Federal University Dutsin-Ma Nigeria Department of Biological Sciences Ahmadu Bello University Zaria Nigeria

This research work studies the impacts of irrigation and other agricultural practices on the soil along the bank of Tungan Kawo dam. The experimental analysis evaluates the soil physicochemical parameters and metal (Cd, Cu, Cr, Ni, Fe, Mn, Pb and Zn) concentrations using sequential extractions. The physicochemical parameters of the soils across the sites indicated values reported for less polluted soils. Also, analysis of total metals in the soils indicated lower concentration of all metals evaluated than recommended standard limits with exception of Cd. The results of sequen tial extraction of heavy metal in soil sample indicated that all metals were mainly associated with the residual, Fe-MnO and organic bound fractions. The residual fraction has the maximum concentration of metals especially in cool and dry season for Cr, Cu, Ni, Pb and Zn, whereas only a small fraction of all the heavy metal is extracted in water soluble, exchangeable and carbonate bound fractions. It indicates that the bioavailability index is low. Hence, mobility of the heavy metals by the surrounding plants grown on the soils is low.

关键词： Metals Soils Sequential Contamination

Predictions of elemental composition of coal and biomass from their proximate analyses using ANFIS, ANN and MLR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2021年第1期8卷 124-140页

作者： Abiodun Ismail lawal Adeyemi Emman Aladejare Moshood Onifade Samson Bada musa Adebayo Idris Department of Mining Engineering Federal University of TechnologyAkureNigeria Oulu Mining School University of OuluOuluFinland Informetrics Research Group Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityVietnam Clean Coal and Sustainable Energy Research Group Faculty of Engineering and the Built EnvironmentUniversity of the WitwatersrandJohannesburgSouth Africa Division of Mining and Geotechnical Engineering Department of CivilEnvironmental and Natural Resources EngineeringLuleåUniversity of TechnologyLuleåSweden

The elemental composition of coal and biomass provides significant parameters used in the design of almost all energy conversion systems and *** laboratory tests to determine the elemental composition of coal and biomass is time-consuming and ***,limited research has suggested that there is a correlation between parameters obtained from elemental and proximate analyses of these *** this study,some predictive models of the elemental composition of coal and biomass using soft computing and regression analyses have been ***-one samples including parameters of elemental and proximate analyses were used during the analyses to develop multiple prediction *** variables for multiple prediction models were selected as carbon,hydrogen,and *** volatile matter,fixed carbon,moisture and ash contents as independent variables,three different prediction models were developed for each dependent parameter using ANFIS,ANN,and *** addition,a routine for selecting the best predictive model was suggested in the *** reliability of the established models was tested by using various prediction performance indices and the models were found to be ***,the developed models can be used to determine the elemental composition of coal and biomass for practical purposes.

关键词： Biomass Coal Elemental composition Proximate analysis Soft computing Regression analysis

Rhotrix Linear Transformation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Linear Algebra & Matrix Theory 2012年第4期2卷 43-47页

作者： Abdul Mohammed musa balarabe Abdussamad Tanko Imam Department of Mathematics Ahmadu Bello University Zaria Nigeria

This paper considers rank of a rhotrix and characterizes its properties, as an extension of ideas to the rhotrix theory rhomboidal arrays, introduced in 2003 as a new paradigm of matrix theory of rectangular arrays. Furthermore, we present the necessary and sufficient condition under which a linear map can be represented over rhotrix.

关键词： Rhotrix Rank Rhotrix Rank Linear Transformation Rhotrix Linear Transformation

Criteria for Maximizing Jobs in Imperfect Production Centers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics 2017年第9期8卷 1257-1266页

作者： Sulaiman Sani Hamisu musa Mustapha lawal Malumfashi Department of Physical Sciences Kampala International University Kampala Uganda Department of Mathematics & Computer Science Umaru Musa Yar'Adua University Katsina Nigeria

The imperfect production center complexity to do with job maximization strategies is shown to have some criteria under which an optimal solution exists. 2010 Subject Classification: 60K25, 97M40,

关键词： M/M/1 Queue Governing Equations Modified Equations Group Structure

Participatory Evaluation of the Relative Livestock Populations and the Assessment of the Status and Impacts of Newcastle Disease in Rural Communities of Two Northeastern States, Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Animal Sciences 2016年第1期6卷 49-58页

作者： Waziri Ibrahim musa Sa’idu lawal Mohammed Bello Paul Ayuba Abdu Department of Veterinary Medicine Ahmadu Bello University Zaria Nigeria Veterinary Teaching Hospital Ahmadu Bello University Zaria Nigeria Department of Veterinary Public Health and Preventive Medicine Ahmadu Bello University Zaria Nigeria

Livestock is an important component of food security in many developing nations. However, animal diseases continue to undermine animal production and public health efforts thus widening poverty gap. Unfortunately, the conventional and what seems to be inefficient “top to bottom” disease surveillance and control policies are heavily relied upon such that negative impacts of diseases are underestimated. Participatory disease surveillance (PDS) techniques using semi-structured questioning assisted by key informants targeting focus groups were employed in 60 randomly selected villages of two Nigerian States during the years 2012 to 2014. Haemagglutination and ELISA tests to detect antibodies to Newcastle disease (ND) were conducted on 950 poultry sera. The status and economic burden of Newcastle disease and the relative livestock populations and some ethno-veterinary practices of these livestock farming communities were brought to the fore. Poultry, goats, cattle, sheep and pigs in descending order were the major livestock species kept in the study areas to which Kendalls Coefficient of Concordance (W = 0.9) agreed strongly. Accordingly, ND, lousiness, fowl pox and coccidiosis with percentage scores of ND-52%, Fowl Pox-31%, lousiness-17% and Salmonellosis-10% were important causes of poultry morbidity and mortality. ND sero-prevalence was 39%, relative morbidity;mortality and case fatality rates of 95%, 78% and 82% respectively were appraised. Again ND, coccidiosis, ectoparasitism and fowl pox were reported as seasonal poultry diseases (W = 0.6). Solanum nodiflorum and Momordica balsalmina were used to treat ND. Major livestock kept, and the ND status and effects in poultry in these livestock farming communities are here reported. Institutionalization of PDS would better inform strategic livestock policy reforms, and improve national food security and diseases surveillance and reporting system in Nigeria.

关键词： Participatory Evaluation Newcastle Disease Rural Communities

Survey on Avian Malaria Parasites in Village Chickens(Gallus gallus domesticus)in Gombe Local Government Area,Gombe State,Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Veterinary Science Research 2021年第2期3卷 7-22页

作者： Jallailudeen Rabana lawal Umar Isa Ibrahim Abdullahi Abubakar Biu Hassan Ismail musa Department of Veterinary Medicine Faculty of Veterinary MedicineUniversity of MaiduguriP.M.B.1069MaiduguriBorno StateNigeria Department of Veterinary Parasitology and Entomology Faculty of Veterinary MedicineUniversity of MaiduguriP.M.B.1069MaiduguriBorno StateNigeria Department of Veterinary Public Health and Preventive Medicine Faculty of Veterinary MedicineUniversity of MaiduguriP.M.B.1069MaiduguriBorno StateNigeria

Reports of avian malaria parasites in village chicken in Nigeria generally remain fragmentary and *** study was conducted in Gombe Local Government Area of Gombe State,Nigeria to investigate avian malaria parasites in Village Chickens(Gallus gallus domesticus)and to determine the risk factors associated with the prevalence of the haemoparasites.A total of 530 village chickens blood samples were obtained from apparently healthy village chickens'brachial veins using sterile 2mls syringes and 23 gauge *** blood smear was made from each blood sample,and Giemsa stained and examined for the presence of avian haemoparasites under an *** result indicates 23.8%overall prevalence rate of three species of avian malaria parasites consisting of Plasmodium,Haemoproteus and Leucocytozoon *** *** the highest prevalent rate of 13.0%followed by Haemoproteus spp.(5.1%),mixed Plasmodium spp.+Haemoproteus spp.(4.9%)infection and Leucocytozoon spp.(0.8%).Prevalence of avian malaria parasites was significantly higher in cocks compared to hens(p<0.05),as well as higher in adults compared to growers chickens(p<0.05).This study also showed a higher prevalence of avian malaria parasites during the rainy season compared to the dry season of the study *** was concluded that haemoparasites of Plasmodium,Haemoproteus and Leucocytozoon species that occur in both single and mixed infections are prevalent among village chickens that are apparently healthy in Gombe Local Government Area of Gombe State,Nigeria.

关键词： Avian Malaria Haemoproteus Leucocytozoon Plasmodium Village chickens

Laboratory Assessment of Susceptibility of Maize Varieties to Post-harvest Infestation By Sitophilus zeamais(Mostchulsky)(Coleoptera: Curculionidae)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Northeast Agricultural University(English Edition) 2018年第4期25卷 1-7页

作者： musa abdulrasak kannike ajayi mary yusuf sáadat yetunde lawal mujidat temidayo Department of Crop Protection University of IlorinIlorinPMB 1515Nigeria

A study was carried out to determine the relative susceptibility of six maize(Zea mays L.) varieties to maize weevil,Sitophilus zeamais Motschulsky(Coleoptera: Curculionidae). It was conducted at Department of Crop Protection Laboratory,University of Ilorin, Nigeria at ambient temperature of 28±2℃ and 68%±3% relative humidity. Samples of the varieties were infestedwith five pairs of S. zeamais adults in their respective containers arranged in completely randomized design with three *** were collected on moisture content, adult mortality, adult emergence, grain loss and grain damage. The index of susceptibilityand means of damage parameters were used to determine susceptibility of the maize varieties. The results showed that 2008 SYNEE W DT STR was highly resistant and 2004 TZE-W POP STR C4 was moderately resistant, while 2004 TZE-Y-POP STR C4,99 TZEE-Y-STR, EV99 QPM and TZE-Y-POP DT STR QPM C_0S1 were susceptible. Under artificial infestation, the weevils hadsignificantly longer survival period in the susceptible varieties than those in the resistant genotype. It could be concluded that thesusceptible varieties already released to farmers should be protected from maize weevil damage.

关键词： grain pest variety susceptibility damage index