1,783 research outputs found
Quasi-particle band structure and optical properties of Perylene Crystal for Solar Cell Application: A G0W0 Calculations
No full textAbdullahi Lawal* , Musa Bello and Ahmed Musa Kona
The increased demand for clean energy due to future fear of scarcity and alarming pollution threats from fossil fuels, has propelled stringent drive on the search for alternative energy source including photovoltaic technology. This technology relies on renewable source and is green, ecofriendly and easily avoidable. In view of the role of photovoltaic technology on organic compound for electronic transition, this study is designed to implement theoretical calculations of structural, electronic and optical properties of the perylene crystal using highly accurate first-principles approach for a many-body perturbation theory (MBPT). The calculated lattice parameters of perylene with GGA-PBE are reasonably in good agreement with experimental measurement.
Many-body perturbation theory (MBPT) based on the G0W0 approximation was used for the calculation of band structure. The bandgap value of 2.4 eV, obtained was consistent with the expected range from experiment (i.e, 2.33-2.46 eV). The optical properties including absorption coefficient, reflectivity, refractive index and energy loss function are derived from the calculated complex dielectric function to understand the optical behavior of perylene. Optical properties calculations show that the results obtained within G0W0 approximation are also close to experimental results. With the evaluated optical gap of 2.4 eV and the expected strong absorption of perylene crystal in the visible light, the investigated material is most likely suitable for solar cell application
Infestation of Zebu cattle (Bos indicus Linnaeus) by hard ticks (Acari: Ixodidae) in Maiduguri, Northeastern Nigeria
No full textPaul, Bura Thlama, Bello, Amina Mohammed, Haruna, Nasir Musa, Dauda, Jamila, Ojo, Deborah Tosin, Gadzama, Mercy Ahmed (2017): Infestation of Zebu cattle (Bos indicus Linnaeus) by hard ticks (Acari: Ixodidae) in Maiduguri, Northeastern Nigeria. Persian Journal of Acarology 6 (3): 213-224, DOI: 10.22073/pja.v6i3.28203, URL: https://www.mendeley.com/catalogue/bfd2a667-ffa6-3ee3-adbf-1a9684dc3adb
Library user’s value-chain: assessing the use of library services by undergraduates in Ahmadu Bello University, Zaria
No full textThis study argues that in order to meet the value chain of library users and increase library patronage, there is the need to assess the use of library services by Undergraduate Students in Ahmadu Bello University, Zaria especially during the examination period when patronage is at the peak. The study had three objectives: To identify the purpose of use of Kashim Ibrahim Library by Undergraduate students in Ahmadu Bello University, Zaria during examination. To identify the services Undergraduate students of Ahmadu Bello University, Zaria use in Kashim Ibrahim Library during examination. To find out the challenges Undergraduate students face in the use of Kashim Ibrahim Library services during examination? A cross-sectional survey research design was adopted and questionnaire was used to collect data for the study. The study revealed that undergraduate in Ahmadu Bello University, zaria use the Library to read their own books during examination, they also use the wireless Internet services and the wired Internet and the computer services of the MTN Net Library. The study also discovered that undergraduates basically use the library space and the Internet and Computer services of the Library. Finally, the study found that the major challenges undergraduates face with the use of library services during examination includes lack of space, inadequate number of computers, lack of comfortable seats, poor Internet services, inadequate power outlets for the students’ laptops and lack of assistance from library staff. The study then recommended that Library management should constitute a section of the library for user needs elicitation. Library space should be well furnished and more space could be freed up in the Library if some of the old resources of the library are weeded and made into closeaccess. They will only be accessed if they are demanded for. The library management could also partition some of the available spaces to make way for areas for small group discussions. Library Management could embark on advocacy to Government parastatals that donate ICTs free of charge. Parastatals like NITDA, NCC and even Ministry of Communication. This will help them secure the additional ICTs for undergraduate use
Assessment of channels for disseminating admission information to student applicants in Ahmadu Bello University, Zaria
No full textThis study assessed the channels for disseminating admission information to student applicants to Ahmadu Bello University, Zaria. Three objectives of this study include: to identify the types of information are disseminated to Student Applicants to the Department of Library and Information Science, Ahmadu Bello University, Zaria. To identify the Channels are used by the Department of Library and Information Science in disseminating information to Student Applicants. To find out the challenges associated with information dissemination to Student Applicants to the Department of Library and Information Science, Ahmadu Bello University, Zaria. Two hundred and twenty undergraduate students were sampled for the study, but only one hundred and ninety-four questionnaires were deemed fit and appropriate for analysis. The study discovered that Entry requirements and Undergraduate programmes available in the department were the types of information that is disseminated by the department. However, information about sales of forms and jamb subject combinations are disseminated by Jamb office. Similarly, the study revealed that the channel of information dissemination in the Department of Library and Information science is the departmental website. The study then recommended that the departments in the university should be put in charge of admission information dissemination for their respective departments. This is because they know best the requirements of their respective departments and the information that student applicants need. And that A multi-channel digital call centre should be provided for all departments that will house a digital help desk. This centre will incorporate telephone, email, social media (WhatsApp Group, Face book Fan page, Twitter Handle and Instagram pages) for the department. This is so that student applicants can contact the department without having to come to Zaria
Figure 2 in Infestation of Zebu cattle (Bos indicus Linnaeus) by hard ticks (Acari: Ixodidae) in Maiduguri, Northeastern Nigeria
No full textFigure 2. Numbers of individual ticks of different species collected from different body parts of cattle.Published as part of Paul, Bura Thlama, Bello, Amina Mohammed, Haruna, Nasir Musa, Dauda, Jamila, Ojo, Deborah Tosin & Gadzama, Mercy Ahmed, 2017, Infestation of Zebu cattle (Bos indicus Linnaeus) by hard ticks (Acari: Ixodidae) in Maiduguri, Northeastern Nigeria, pp. 213-224 in Persian Journal of Acarology 6 (3) on page 218, DOI: 10.22073/pja.v6i3.28203, http://zenodo.org/record/717366
Factores que influyen en el establecimiento in vitro de Musa sp. L. “banano” variedad Williams
No full textLa propagación in vitro de Musa sp. L. “banano”, requiere una etapa de establecimiento para eliminar contaminantes y adaptar el tejido vegetal a las nuevas condiciones de cultivo. El objetivo del presente estudio fue determinar la influencia de factores como el desinfectante, regulador de crecimiento y antioxidantes, en el establecimiento in vitro de Musa sp. L. variedad Williams. Para lograr dicho objetivo se evaluaron tratamientos de desinfección con distintas concentraciones y tiempos de inmersión en hipoclorito de sodio (T0: testigo; T1: 3% NaClO por 15 minutos; T2: 4% NaClO por 10 minutos) y en el medio de establecimiento se evaluaron diferentes concentraciones de bencilaminopurina (BAP) en conjunto con antioxidantes como ácido ascórbico, cisteína y carbón activado (M0: testigo; M1: BAP, 1mg/l; ácido ascórbico, 100mg/l y cisteína, 60mg/l; M2: BAP, 3,5mg/l; ácido ascórbico, 30mg/l y cisteína, 40mg/l; M3: BAP, 5mg/l; carbón activado, 3g/l y ácido ascórbico, 100mg/l). El mejor resultado se obtuvo en el tratamiento T1 con 92,86% de sobrevivencia y 7,14% de contaminación. Se utilizó un diseño completamente al azar desbalanceado. Se aplicó la prueba no paramétrica de Kruskal Wallis para analizar las respuestas morfoanatómicas de los explantes de Musa sp. L. variedad Williams. No se hallaron diferencias estadísticamente significativas en la altura, número de brotes, hojas y raíces, excepto en la anchura, donde los tratamientos M2 y M3 presentaron diferencia estadísticamente significativa del M0.
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The in vitro propagation of Musa sp. L. “banano”, requires an establishment stage to eliminate contaminants and adapt plant tissue to new cultivation conditions. The aim of this study was to determine the influence of factors such as the disinfectant, growth regulator, and antioxidants on the in vitro establishment of Musa sp. L. Williams variety. To achieve this goal, disinfection treatments were evaluated with different concentrations and immersion times in sodium hypochlorite (T0: control; T1: 3% NaClO for 15 minutes; T2: 4% NaClO for 10 minutes). In the establishment medium, different concentrations of benzylaminopurine (BAP) were assessed in conjunction with antioxidants such as ascorbic acid, cysteine, and activated carbon (M0: control; M1: BAP, 1mg/l; ascorbic acid, 100mg/l; cysteine, 60mg/l; M2: BAP, 3.5mg/l; ascorbic acid, 30mg/l; cysteine, 40mg/l; M3: BAP, 5mg/l; activated carbon, 3g/l; ascorbic acid, 100mg/l).The best result was achieved in treatment T1 with 92.86% survival and 7.14% contamination. A unbalanced completely randomized design was used. The non-parametric Kruskal-Wallis test was applied to analyze the morphoanatomical responses of the Musa sp. L. Williams variety explants. There were no statistically significant differences in height, number of shoots, leaves, and roots, except for width, where treatments M2 and M3 showed a statistically significant difference from M0
Detection of Listeria Species and Staphylococcus aureus in Smoked Fish Sold Within Ahmadu Bello University Main Campus Samaru, Zaria
No full textHygiene practices in food processing plants are important determinants of food quality and safety. Poor hygiene practices may result in the contamination of foods and food products with pathogens, which means a serious risk to public health. This study was aimed at isolating and determining the antibacterial susceptibility profile of Listeria spp. and Staphylococcus aureus from smoked fish sold within Ahmadu Bello University Main Campus. A total of twenty-five (25) smoked fish samples were collected. Fifteen (15) samples, five each from Community market, Akenzua market and ICSA Ramat market were processed and inoculated on Mannitol Salt Agar for the isolation of Staphylococcus aureus. The remaining ten (10) samples were processed using stomacher and on Listeria Selective Agar (Oxford formulation) for the isolation of Listeria spp. The isolates were characterized based on their colonial morphology, Gram’s and biochemical reactions. In addition, agglutination test was carried out to further identify Listeria spp. Antibacterial susceptibility patterns of the isolates was determined using disc diffusion method. Staphylococcus aureus was isolated from all the 15 samples analyzed, giving an occurrence of 100%. However, only one Listeria spp. (Listeria ivanovii) was isolated from the 10 samples analyzed, with a 10% occurrence. All the S. aureus isolates were susceptible to most of the antibiotics, but four were resistant to rocephin and eight to ampiclox. The Listeria ivanovii isolate was also resistant to most of the antibiotics and susceptible to only two. The Multiple Antibiotics Resistance Index (MARI) of S. aureus isolates ranges from 0.2 to 0.4 while it was 0.75 for the Listeria ivanovii isolate. The study demonstrated that smoked fish sold in Ahmadu Bello University Main Campus were found to be contaminated and its consumption is potentially regarded as a health hazard, as such measures should be adopted to control it
Exploring awareness and factors facilitating diffusion, adoption and use of social media in teaching, learning and research by faculty members in Ahmadu Bello University, Zaria
No full textThis paper focused on Exploring Awareness and Factors Facilitating Diffusion, Adoption and Use of Social Media in Teaching, Learning and Research (TLR) by Faculty Members in Ahmadu Bello University, Zaria. The objectives of this paper are: To identify the types social media faculty members of Ahmadu Bello University, Zaria, are aware of and to identify factors that facilitate the diffusion, adoption and use of social media in TLR by faculty members in Ahmadu Bello University, Zaria. The researchers used single case study research design for this study. The population of this study comprised all the faculty members including staff in training in the 12 faculties of ABU, Zaria with a total number of One thousand nine hundred and fifty nine (1, 959). The researchers selected participants purposefully who must have had life experiences with using social media in Teaching, Learning, Research. Thus, the researchers used this criterion to select 12 faculty members for the interview, one from each faculty. The researcher employed interview as the instrument for collecting data. The researcher adopted the thematic process of data analysis. It was found out that Faculty members were aware of two types of social media: Everyday life Social Media and Scholarly Social Media. Factors that facilitate the diffusion of social media for TLR are: being technologically savvy (curiosity), social media as a tool for interactions, social media as a tool for collaboration and Interactions among faculty members. Factors that facilitate Adoption of social media for TLR by the faculty members are academic network, official academic gathering, and family members. Factors that facilitate the Use of social media by the faculty members are social media benefit, ease of use and Exposure of faculty members abroad (training) etc. It was concluded that Faculty members in Ahmadu Bello University, Zaria were aware of scholarly social media and everyday life social media. They indicated that diffusion, adoption and use of social media for teaching, learning and research depend on some factors. These factors included curiosity, Academic connectivity like academic colleagues, online forums, students etc. It was recommended that University management should mount training programmes aimed at creating awareness on the academic implication of the two social media types and how best to apply in Teaching, Learning, Research. Training programmes in the form of workshops, conferences and symposium etc. would ensure increased awareness and encourage best practice and Faculty members should endeavor to acquire technology savvy skills as it will help in upstanding social media technologies which will improve Teaching, Learning and Research in the University
Detection of Aerobic Vaginitis and Antibiogram of its Implicating Bacteria among Women with Suspected Cases of Vaginitis in Obstetrics and Gynecology Clinics, Ahmadu Bello Teaching Hospital, Shika, Zaria-Nigeria
No full textAerobic vaginitis (AV) is a condition caused by aerobic bacteria, posing significant risks to women's health, particularly during pregnancy. Misdiagnosis and treatment challenges stem from widespread multidrug-resistant bacteria. This study aimed to diagnose aerobic vaginitis (AV) and assess antibiotic susceptibility patterns of the implicated bacteria in vaginitis among women attending Ahmadu Bello University Teaching Hospital's Obstetrics and Gynecology Clinics in Zaria, Nigeria. A total of 100 high vaginal swab (HVS) samples were collected and subjected to bacterial isolation, identification, and antibiotic susceptibility testing using cultural and biochemical methods, and the agar disc diffusion method, respectively. Results indicated 23% positivity for AV, with the highest prevalence observed in the 41-50 age group (50.0%) and the lowest in the 21-30 age group (7.3%), revealing a significant association between age and AV (p0.05). Symptomatically, painful intercourse correlated with a 28.0% AV rate, while vaginal itching showed an 18.5% rate, though lacking a symptom-AV relationship (p>0.05). Notably, condom use during sexual intercourse exhibited a higher AV rate (63.6%) than non-users (18.0%). AV prevalence was notably higher among women with a history of miscarriage (62.5%) compared to those without (15.5%), showing a significant association between risk factors and AV (p<0.05). Klebsiella species (47.8%) and Escherichia coli (30.4%) were the primary AV-associated bacteria, with Klebsiella spp. showing high resistance to Ceftriaxone and Ampicillin (100%). These findings underscore the importance of accurate AV diagnosis to avert adverse outcomes like miscarriage and postpartum complications and highlight the need to reconsider Ceftriaxone and Ampicillin usage in AV treatment
Man up: stories of Parvez and Muna
No full textA collection of linked comic short stories about a young Muslim couple, tracing their relationship from their traditional courtship to the early parenthood.M.F.A.by Musa Syee
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