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Sample records for cement wapco nigerian

  1. Some factors which may affect blood pressure in Nigerian cement ...

    African Journals Online (AJOL)

    Objective: To investigate the influence of age, nature of job and duration of employment on the blood pressure of the workers of a cement factory in Nigeria. Design: BP was measured using the standard sphygmomanometer and stethoscope. Workers were classified based on age, type of job, and the number of years they ...

  2. Nigerian

    African Journals Online (AJOL)

    USER

    2016-11-08

    Nov 8, 2016 ... Nigerian Building and Road Research Institute, Abuja, Nigeria. Abstract. Effective solid waste management is the collective .... 403,000 people. According to the master plan, Abuja is divided into three phases. ..... Landfill Operations in the Niger. Delta Region of Nigeria. Engineering Geology, 73(1-2): 171-.

  3. Caustic Cement Burn in a Nigerian Male: A Surrogate for the State of ...

    African Journals Online (AJOL)

    Background Cement is an important material used in the construction industry. When mixed with water, it has abrasive, caustic and drying properties that could causeallergic and sensitivity reactions to the skin, chemical skin burns ordamage to the eyes following contact. Cement burns to the skin appears to occur commonly ...

  4. Dangote cement : an African success story?

    NARCIS (Netherlands)

    Akinyoade, A.; Uche, C.U.

    2016-01-01

    This paper critiques the rise of Dangote Cement plc to become the dominant player in the Nigerian cement industry. Although the close relationship between the company's founder, Aliko Dangote, and subsequent Nigerian governments has been an important factor in this success story, we argue that it is

  5. The effect of chronic cement dust exposure on lung function of ...

    African Journals Online (AJOL)

    The present study was designed to investigate the effect of cement dust exposure on lung function in Nigerians because of paucity of such data. Lung function tests were carried out on 56 cement factory workers with mean years of exposure to cement dust of 10.2±5.6 years and on 96 non exposed subjects. The vital ...

  6. Shear bond strength of a self‑etched resin cement to an indirect ...

    African Journals Online (AJOL)

    2014-11-15

    Nov 15, 2014 ... Nigerian Journal of Clinical Practice • May-Jun 2015• Vol 18 • Issue 3. Abstract ... Key words: Composite resins, dental bonding, resin cements, surface properties ... etching effect of Er, Cr: YSGG laser on indirect composite.

  7. Cement Formation

    DEFF Research Database (Denmark)

    Telschow, Samira; Jappe Frandsen, Flemming; Theisen, Kirsten

    2012-01-01

    Cement production has been subject to several technological changes, each of which requires detailed knowledge about the high multiplicity of processes, especially the high temperature process involved in the rotary kiln. This article gives an introduction to the topic of cement, including...... an overview of cement production, selected cement properties, and clinker phase relations. An extended summary of laboratory-scale investigations on clinkerization reactions, the most important reactions in cement production, is provided. Clinker formations by solid state reactions, solid−liquid and liquid...

  8. Nigerian Food Journal: Contact

    African Journals Online (AJOL)

    Nigerian Food Journal. ... Nigerian Food Journal: Contact. Journal Home > About the Journal > Nigerian Food Journal: Contact. Log in or Register to get access to full text downloads. ... Mailing Address. Department of Food Science and Technology University of Agriculture, Makurdi, Nigeria ...

  9. Low heat cement; Teihatsunetsu cement

    Energy Technology Data Exchange (ETDEWEB)

    Yoshida, K.; Igarashi, H. [Ube Industries, Ltd., Tokyo (Japan)

    1994-09-01

    This paper summarizes the result of studies on low heat (low hydration heat) cement intended to prevent cracking. Good compositional proportions of alite and belite as components of Portland cement are belite at 63% and alite at 37% when hydration heat, strength, and concrete durability are taken into account. Mixing the blast furnace slag into cement fills the voids at low hydration heat, and raises the strength without increasing the hydration heat. However, the voids remain in a long-term material age. The strength of the belite-based cement is improved when the higher the temperature within a range from 20 to 60{degree}C. In the case of a mixed cement of belite-based cement and blast furnace slag, using the blast furnace slag at 60% maintains the strength and reduces the hydration heat. The strength decreases at a curing temperature of 60{degree}C or higher. Hardened mortar with a material age of three days has its voids disappear at 40{degree}C. More void disappearance cannot be recognized even if the material age gets older. Hydration heat decreases largely in the belite-based cement and flyash mixed cement. The strength also decreases, but it increases conversely when the material age gets as old as one year. Flyash causes the temperature to rise more moderately than blast furnace slag. 21 refs., 16 figs., 1 tab.

  10. Characterisation and classification of cement dust-polluted soils in ...

    African Journals Online (AJOL)

    Characterisation and classification of cement dust-polluted soils in Sagamu area, Southwestern Nigeria. LO Solarin, GA Ayolagha. Abstract. No Abstract. Nigerian Journal of Soil Sciences Vol. 16 (1) 2006: pp. 24-34. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT.

  11. resuscitation among Nigerian doctors

    African Journals Online (AJOL)

    ABSTRACT. Background: Cardiopulmonary resuscitation (CPR), first described in 1960, is observed to be poorly applied in quality and quantum, hence, the need to ascertain its correct knowledge and practice among Nigerian doctors. Methods: Questionnaires were distributed randomly to doctors in a Nigerian University.

  12. Nigerian Journal of Surgery

    African Journals Online (AJOL)

    The Nigerian Journal of Surgery publishes original articles, special articles (by invitation), reviews, case reports, correspondences and notes. Materials cited for publication will include scientific research papers read at the meetings of the Nigerian Surgical Research Society, and of the Association of Surgeons of Nigeria and ...

  13. Archives: Nigerian Endocrine Practice

    African Journals Online (AJOL)

    Archives: Nigerian Endocrine Practice. Journal Home > Archives: Nigerian Endocrine Practice. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. 1 - 4 of 4 Items. 2013. Vol 7, No 1 ...

  14. Nigerian School Library Journal

    African Journals Online (AJOL)

    The Nigerian School Library Journal is a scholarly publication of the Nigerian School Library Association that focuses on issues relating to school library media centers' establishment, administration, organization, media resources management, reading development, e-learning/m-learning, and other related topics of ...

  15. Nigerian Veterinary Journal

    African Journals Online (AJOL)

    The Nigerian Veterinary Journal (NVJ) has been in existence since 1971. The NVJ is published by the Nigerian Veterinary Medical Association (NVMA) as part of the association's commitment to the advancement of Veterinary Medicine in Nigeria and other parts of the world, with a general view of enhancing the livestock ...

  16. Archives: Nigerian Veterinary Journal

    African Journals Online (AJOL)

    Items 1 - 49 of 49 ... Archives: Nigerian Veterinary Journal. Journal Home > Archives: Nigerian Veterinary Journal. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. 1 - 49 of 49 Items ...

  17. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 37(3). 2016. Okorie-Kanu et al. 160. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., September 2016. Vol. 37 (3): ... Nigeria; 3Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Enugu state,. Nigeria. ...... (ASVCP), International Veterinary.

  18. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 37(3). 2016. Meseko et al. 155. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., September 2016. Vol. 37 (3): 155-159. SHORT COMMUNICATION. Detection of Haemagglutination inhibition antibody to Pandemic and. Classical Swine Influenza Virus in Commercial Piggery in ...

  19. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 37(1). 2016. Igado et al. 54. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., March 2016. Vol. 37 (1): 54-63. ORIGINAL ARTICLE. Cranio-facial and Ocular Morphometrics of the Male Greater Cane Rat. (Thryonomys swinderianus). Igado, O. O.. 1. *; Adebayo, A. O.. 2.

  20. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 37(3). 2016. Ogunro et al. 187. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., September 2016. Vol. 37 (3): 187-191. CASE REPORT. Management of Epitheliogenesis Imperfecta in a Piglet (Sus Scrofa domesticus) in Ibadan, Nigeria. Ogunro, B. N.. 1. ; Otuh, P. I.. 1.

  1. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 38(2). 2017. Meseko et al. 124. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., June 2017. Vol 38 (2): 124-128. SHORT COMMUNICATION. Fowlpox Virus from Backyard Poultry in Plateau State Nigeria: Isolation and Phylogeny of the P4b Gene Compared to a Vaccine Strain.

  2. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 38(3). 2017. Gberindyer et al. 250. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., September 2017. Vol 38 (3): 250-259. ORIGINAL ARTICLE. Drugs Prescription Pattern in Dogs Diagnosed with Parvovirus Enteritis in Some Veterinary Clinics in Nigeria. Gberindyer, F. A.. 1.

  3. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    2000-07-02

    Jul 2, 2000 ... Nigerian Veterinary Journal 36(4). 2015. Owoyemi et al. 1341. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., December 2015 ... medicine, 3Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Nigeria. .... in wound or burn healing, internal intake of.

  4. CEMENT SLURRIES FOR GEOTHERMAL WELLS CEMENTING

    Directory of Open Access Journals (Sweden)

    Nediljka Gaurina-Međimurec

    1994-12-01

    Full Text Available During a well cementing special place belongs to the cement slurry design. To ensure the best quality of cementing, a thorough understanding of well parameters is essential, as well as behaviour of cement slurry (especially at high temperatures and application of proven cementing techniques. Many cement jobs fail because of bad job planning. Well cementing without regarding what should be accomplished, can lead to well problems (channels in the cement, unwanted water, gas or fluid production, pipe corrosion and expensive well repairs. Cementing temperature conditions are important because bot-tomhole circulating temperatures affect slurry thickening time, arheology, set time and compressive strength development. Knowing the actual temperature which cement encounters during placement allows the selection of proper cementing materials for a specific application. Slurry design is affected by well depth, bottom hole circulating temperature and static temperature, type or drilling fluid, slurry density, pumping time, quality of mix water, fluid loss control, flow regime, settling and free water, quality of cement, dry or liquid additives, strength development, and quality of the lab cement testing and equipment. Most Portland cements and Class J cement have shown suitable performances in geot-hermal wells. Cement system designs for geothermal wells differ from those for conventional high temperature oil and gas wells in the exclusive use of silica flour instead of silica sand, and the avoidance of fly ash as an extender. In this paper, Portland cement behaviour at high temperatures is described. Cement slurry and set cement properties are also described. Published in literature, the composition of cement slurries which were tested in geothermal conditions and which obtained required compressive strength and water permeability are listed. As a case of our practice geothermal wells Velika Ciglena-1 and Velika Ciglena-la are described.

  5. Percutaneous Injuries in Nigerian Dentists | Utomi | Nigerian ...

    African Journals Online (AJOL)

    Objective: The purpose of this study is to assess the frequency of percutaneous injuries among Nigerian dentists and to describe the factors associated with the injuries. Materials and Methods: A questionnaire survey of 160 practicing dentists in Lagos, Ibadan, Ife and Benin. Result: A total of 208 injuries were reported by ...

  6. Myocardial ischemia in hypertensive Nigerians | Ukoh | Nigerian ...

    African Journals Online (AJOL)

    No Abstract. Nigerian Medical Practitioner Vol. 52 (1) 2007: pp. 8-11. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Article Metrics. Metrics Loading ... Metrics powered by PLOS ALM · http://dx.doi.org/10.4314/nmp.v52i1.28882 · AJOL African Journals Online. HOW TO ...

  7. POPULATION OF NIGERIAN CHILDREN

    African Journals Online (AJOL)

    concerning malocclusion in the primary dentition of Nigerian children. This study aimed at ... Albeit, the status of the primary dentition affects the development ..... Kerosuo H. Occlusion in the primary and early mixed dentition in a group of ...

  8. Nigerian Health Journal

    African Journals Online (AJOL)

    reviewed, English language, medical and health science journal that is published quarterly by the Nigerian Medical Association, Rivers state branch, Nigeria. The journal publishes any contribution that advances medical science or practice ...

  9. comparative cost and strength analysis of cement and aggregate

    African Journals Online (AJOL)

    2012-07-02

    Jul 2, 2012 ... Nigerian Journal of Technology (NIJOTECH). Vol. 31, No. 2, July ... and building industries and the cost of concrete pro- duction is .... The wa- ter/cement ratio used for the periwinkle gravel con- crete was 0.5 to produce cubes of 150mm thick. Pro- portions of periwinkle shell to gravel are in the ra- tios of 0:1, ...

  10. Nigerian Endocrine Practice: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. Nigerian Endocrine Practice, a peer reviewed publication published twice a year is the official publication of the Nigerian Chapter of the American Association of Clinical Endocrinologists (AACE-Nigeria). The primary mission of the Nigerian Endocrine Practice is to enhance the health care of patients with ...

  11. Nigerian Journal of Paediatrics: Submissions

    African Journals Online (AJOL)

    If digital images are the only source of images, ensure that the image has minimum resolution of 300 dpi or 1800 x 1600 pixels in TIFF format. ... Nigerian Journal of Paediatrics charges Nigerian Naira 5000 (USD25) on submission of manuscript as processing fees and Nigerian Naira 25,000 (USD125) publication fees on ...

  12. ULTRA-LIGHTWEIGHT CEMENT

    Energy Technology Data Exchange (ETDEWEB)

    Fred Sabins

    2002-07-30

    The objective of this project is to develop an improved ultra-lightweight cement using ultra-lightweight hollow glass spheres (ULHS). This report includes results from laboratory testing of ULHS systems along with other lightweight cement systems, including foamed and sodium silicate slurries. During this project quarter, a comparison study of the three cement systems examined the effect that cement drillout has on the three cement systems. Testing to determine the effect of pressure cycling on the shear bond properties of the cement systems was also conducted. This report discusses testing that was performed to analyze the alkali-silica reactivity of ULHS in cement slurries.

  13. Journal of the Association of Nigerian Musicologists

    African Journals Online (AJOL)

    The objectives of Journal of the Association of Nigerian Musicologists are to develop musicology as a field through research and publication of highly standard articles; to enhance quality scholarship in Nigerian music and to promote Nigerian musicology internationally ...

  14. Nigerian Journal of Parasitology: Journal Sponsorship

    African Journals Online (AJOL)

    Nigerian Journal of Parasitology: Journal Sponsorship. Journal Home > About the Journal > Nigerian Journal of Parasitology: Journal Sponsorship. Log in or Register to get access to full text downloads.

  15. Asphalt cement poisoning

    Science.gov (United States)

    ... petroleum material that hardens when it cools. Asphalt cement poisoning occurs when someone swallows asphalt. If hot ... found in: Road paving materials Roofing materials Tile cements Asphalt may also be used for other purposes.

  16. Nigerian Journal of Otorhinolaryngology

    African Journals Online (AJOL)

    The Nigerian Journal of Otorhinolaryngology was established by the Otorhinolaryngological Society of Nigeria, as an international medium for the rapid dissemination of original research and scientific works related to all aspects of academic and clinical practice of Otorhinolaryngology. It aims to promote academic and ...

  17. ,3. Nigerian Veterinary Journal

    African Journals Online (AJOL)

    Nigerian Veterinary Journal. Vol 34 pi res-sea. Epizootiologicul Survey of Bovine Brucellosis in. Nomadic Pastoral ... brucellosis in the pastoral herds of Niger State despite its high cattle population and no research has ..... Brucella abortus infection in Cattle in Chile. Archivos de Med.Veterin.. 27: 45-50. ROTH, F., ZINSSTAG ...

  18. Nigerian Journal of Technology

    African Journals Online (AJOL)

    The Nigerian Journal of Technology is based at the Faculty of Engineering, University of Nigeria, Nsukka and has been in existence for over 30 years. Any paper submitted to the journal should be an original thought-provoking review or appraisal of existing knowledge, collation of relevant data of interest or investigation ...

  19. Nigerian Journal of Paediatrics

    African Journals Online (AJOL)

    The Nigerian Journal of Paediatrics a quarterly journal publishes original articles, brief reports on clinical and laboratory observations; case reports of substantive value; invited editorial annotations; invited papers on recent electronic clinical briefs, advances, clinical diagnosis, announcements (meetings, courses, job ...

  20. Annals of Nigerian Medicine

    African Journals Online (AJOL)

    The Annals of Nigerian Medicine is an editorially independent publication by the Association of Resident Doctors of the Ahmadu Bello University Teaching hospital Zaria, Nigeria. the journal is multidisciplinary and provides a forum for the dissemination of research finding, reviews, theories and information on all aspects of ...

  1. Nigerian Medical Journal

    African Journals Online (AJOL)

    The Nigerian Medical Journal publishes original articles, reviews, memoranda, reports, case reports, reports of meetings as supplements, letters to the Editor, Association New, book reviews as well as any news of medical relevance. Topics published are of interest to clinicians, researchers, resident doctors, epidemiologists ...

  2. Nigerian Veterinary Journal: Submissions

    African Journals Online (AJOL)

    SCOPE The Editorial Board of the Nigerian Veterinary Journal (NVJ) welcomes contributions in the form of original research papers, review articles, clinical case reports, and short communications on all aspects of Veterinary Medicine, Surgery and Animal Production. Submissions are accepted on the understanding that ...

  3. '*Nigerian Veterinary Journal

    African Journals Online (AJOL)

    '*Nigerian Veterinary Journal. ~. Vol35 (1)9~8· 955. ARTICLE. Prevalence of Aeromonas hydrophila. Isolates in cultured and Feral Clarias gariepinus of the Kainji Lake Area, Nigeria,. OMEJE, V.O.' and CHUKWU, C.C.. Aquaculture Programme. National Institute for Freshwater Fisheries Researcl1. PMB 6006, New Bussa, ...

  4. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    findings comparable to VHS for evaluation of heart size (Nakayama et al., ... have applied VHS along with the other cardiac diagnostic modalities ... very cheap and may be a very good alternate means of evaluating cardiac size. This study is a preliminary assessment of VHS of the. Nigerian mongrel dog. MATERIALS AND ...

  5. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    SUMMARY. This study was aimed at conducting ophthalmic sonographic examination of Nigerian indigenous dogs to provide baseline information on some major ocular parameters. Healthy eyes of eighty. (80) indigenous dogs were used for the study. The dogs were adequately restrained physically and the structure of ...

  6. NIGERIAN CULTURAL HERITAGE: PRESERVATION ...

    African Journals Online (AJOL)

    Dean SPGS NAU

    Ecological or natural heritages emanate from nature and environment. Ecological heritages can be defined as the relatively undisturbed or uncontaminated natural areas with its wild plants ... architecture/buildings, defensive walls and ditches, crafts, tools, .... influence of traditional rulers and their role in preserving Nigerian.

  7. Nigerian journal of technology

    African Journals Online (AJOL)

    student1

    2013-07-02

    Jul 2, 2013 ... Keywords: Discharge, probability distribution model, return period, gauging station, prediction error levels. 1. Introduction. Though flood water is an essential resource in many countries and ... denote a statistical analysis of flood, their. Nigerian ... continuous mathematical expression that determines the ...

  8. Nigerian journal of technology

    African Journals Online (AJOL)

    student1

    2013-07-02

    Jul 2, 2013 ... NIGERIAN JOURNAL OF TECHNOLOGY. VOL. 32 NO. 2, JULY 2013 254 channel [4]. In [5], the effects of path-loss exponent and noise level on the transmit power and energy per successfully received bit (EPSB) for wireless communication systems were investigated. Analysis of the results shows that path ...

  9. Nigerian Journal of Physics

    African Journals Online (AJOL)

    (1982) as well as the prescription of Pattnaik et al.(1979) which eliminated the numerical instability problems. The liquid metal resistivity is evaluated using Simpson's rule. Keywords: Pseudopotential, liquid metal resistivity, matrix element, linear coefficients, inverse orthogonality transformation. Nigerian Journal of Physics ...

  10. Nigerian Journal of Fisheries

    African Journals Online (AJOL)

    Today the membership of the society has expanded cutting across all the related disciplines including fisheries scientists, fishing companies and professional industrial fishing/fish farming enthusiasts and entrepreneurs. The Nigerian Journal of Fisheries ... Open Access DOWNLOAD FULL TEXT Subscription or Fee Access ...

  11. Nigerian Food Journal

    African Journals Online (AJOL)

    The Nigerian Food Journal (NIFOJ) is a journal of international standard established in 1983 to provide a forum for the dissemination of interdisciplinary knowledge on all aspects of food science and technology. In particular, NIFOJ is designed to contribute towards the development of new and improved food sources, ...

  12. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 38(2). 2017. Mustapha et al. 129 ... 1 Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture Abeokuta,. Abeokuta, Ogun State; 2 ..... lamina 9; IB: Internal basilar nucleus; ICI: Intercalated nucleus; ICo9: Intercostal muscle motor neurons of lamina 9; ...

  13. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Nigerian Veterinary Journal 37(3). 2016. Thomas et al. 123 .... Veterinary Medicine, Federal University of. Agriculture Abeokuta and were ..... immunogenic Salmonella ghost confers protection against internal organ colonization and egg contamination. Veterinary immunology and immunopathology,. 162(1-2): 41–50. JOSHI ...

  14. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    1288. NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., December 2015. Vol. 36 (4): 1288-1298. ORIGINAL ARTICLE. Anatomical Studies of ... 1Veterinary Teaching Hospital, Faculty of Veterinary Medicine, University of Ilorin, Ilorin, Nigeria; 2 Department of .... back, the internal organs were measured in.

  15. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    Vet. J., June 2016. Vol. 37 (2): 82-87. ORIGINAL ARTICLE. Cystographic Evaluation Post Colocystoplasty in Two Nigerian. Indigenous Dogs. Muhammad S. T.*. 1 ., Awasum C. A.. 2 ... integrity/morphology of most internal body organs or system(s) of an individual, ..... Journal of Veterinary. Medicine and Animal Health, 7(1):.

  16. Nigerian Journal of Psychiatry

    African Journals Online (AJOL)

    The Nigerian Journal of Psychiatry publishes original scientific papers, review articles, short reports and opinion papers in all areas of psychiatry and related fields, such as sociology, applied anthropology and neurosciences. Vol 14, No 1 (2016). DOWNLOAD FULL TEXT Open Access DOWNLOAD FULL TEXT ...

  17. NIGERIAN VETERINARY JOURNAL

    African Journals Online (AJOL)

    ADEYEYE

    NIGERIAN VETERINARY JOURNAL. ISSN 0331-3026. Nig. Vet. J., March 2016. Vol. 37 (1): 24-31. ORIGINAL ARTICLE. Occurrence of Klebsiella Species in Cultured African Catfish in Oyo. State, South-West Nigeria. Adeshina, I. 1. *; Abdrahman, S. A.. 2 and Yusuf, A. A.. 3. 1Department of Aquaculture and Fisheries, ...

  18. Nigerian Music Review

    African Journals Online (AJOL)

    Nigerian Music Review is aimed at the scholarly review of the developments in various musical practices in Nigeria. It considers well researched articles in any of the following areas: Musicology, Ethnomusicology, African Music, Music Education, Performance, Composition, Music Technology, Music & Related Disciplines, ...

  19. Nigerian journal of technology

    African Journals Online (AJOL)

    student1

    in terms of weight. The results show a general decrease in optimum moisture content, liquid limits and Permeability. There were also ... increased. Nigerian Journal of Technology (NIJOTECH). Vol. 32. No. 2. July 2013, pp. 203-210 .... pore spaces between the different coagulated units of the soils have increased thereby.

  20. Nigerian Creole as language of instruction: Will Nigerian lecturers use Nigerian Creole?

    Directory of Open Access Journals (Sweden)

    Uju C. Ukwuoma

    2015-04-01

    Full Text Available This mixed questionnaire survey sought to determine if lecturers who learned to speak and understand Nigerian Creole before English are willing to use the language as medium of instruction. The respondents were comprised of 560 lecturers and graduate students (i.e. master’s, doctoral selected through a purposeful random sampling frame from 15 public institutions of higher learning in Nigeria. Lecturers declined to use Nigerian Creole as medium of instruction because they feared that its use might negatively affect their students’ learning of English. Graduate students indicated willingness to receive instruction through a combination of English and Nigerian Creole because they perceived the use of Nigerian Creole as fun and representative of the voice of a new generation of Nigerians. The sample reported that prior knowledge of Nigerian Creole does not facilitate the learning of English because both languages are too different to facilitate a transfer of learning.

  1. CHH Cement Composite

    Science.gov (United States)

    Cwirzen, A.; Habermehl-Cwirzen, K.; Nasibulina, L. I.; Shandakov, S. D.; Nasibulin, A. G.; Kauppinen, E. I.; Mudimela, P. R.; Penttala, V.

    The compressive strength and electrical resistivity for hardened pastes produced from nanomodified Portland SR cement (CHH- Carbon Hedge Hog cement) were studied. The nanomodification included growing of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) on the cement particles. Pastes having water to binder ratio of 0.5 were produced. The obtained hardened material was characterized by increased compressive strength in comparison with the reference specimens made from pristine SR cement, which was attributed to reinforcing action of the CNTs and CNFs. The electrical resistivity of CHH composite was lower by one order of magnitude in comparison with reference Portland cement paste.

  2. ULTRA-LIGHTWEIGHT CEMENT

    Energy Technology Data Exchange (ETDEWEB)

    Fred Sabins

    2001-04-15

    The objective of this project is to develop an improved ultra-lightweight cement using ultralight hollow glass spheres (ULHS). Work reported herein addresses Task 1: Assess Ultra-Lightweight Cementing Problems and Task 3: Test Ultra-Lightweight Cements. Results reported this quarter include a review and summary of Halliburton Energy Services (HES) and BJ Services historical performance data for lightweight cement applications. These data are analyzed and compared to ULHS cement and foamed cement performances. Similar data is expected from Schlumberger, and an analysis of this data will be completed in the following phases of the project. Quality control testing of materials used to formulate ULHS cements in the laboratory was completed to establish baseline material performance standards. A testing protocol was developed employing standard procedures as well as procedures tailored to evaluate ULHS and foamed cement. This protocol is presented and discussed. Results of further testing of ULHS cements are presented along with an analysis to establish cement performance design criteria to be used during the remainder of the project. Finally, a list of relevant literature on lightweight cement performance is compiled for review during the next quarter.

  3. Cement for Oil Well Cementing Operations in Ghana

    African Journals Online (AJOL)

    Michael

    with Imported Class 'G' Cement for Oil Well Cementing Operations in Ghana”, Ghana Mining Journal, Vol. ... to compare the physical properties of locally manufactured cement in Ghana with the class G cement. 2 Materials and Methods. 2.1 Materials. Three brands of .... Rheology of cement slurries is of great importance.

  4. ULTRA-LIGHTWEIGHT CEMENT

    Energy Technology Data Exchange (ETDEWEB)

    Fred Sabins

    2001-01-15

    The objective of this project is to develop an improved ultra-lightweigh cement using ultralight hollow glass spheres (ULHS). Work reported herein addresses Task 1: Assess Ultra-Lightweight Cementing Problems, Task 2: Review Russian Ultra-Lightweight Cement Literature, and Task 3: Test Ultra-Lightweight Cements. Results reported this quarter include a review and summary surface pipe and intermediate casing cementing conditions historically encountered in the US and establishment of average design conditions for ULHS cements. Russian literature concerning development and use of ultra-lightweight cements employing either nitrogen or ULHS was reviewed, and a summary is presented. Quality control testing of materials used to formulate ULHS cements in the laboratory was conducted to establish baseline material performance standards. A testing protocol was developed employing standard procedures as well as procedures tailored to evaluate ULHS. This protocol is presented and discussed. finally, results of initial testing of ULHS cements is presented along with analysis to establish cement performance design criteria to be used during the remainder of the project.

  5. Nigerian Food Journal: Submissions

    African Journals Online (AJOL)

    Nigerian Food Journal 25: 130-140. For textbooks, the name(s) of the author(s) and the title of the book, followed by the publisher, city of publishing and the pages referred e.g. Iwe, M. O. (2003). The Science and technology of soybean, Rojoint publishers Enugu, pp. 123-230. For chapters in a book, the names of the author, ...

  6. Nigerian Journal of Animal Production

    African Journals Online (AJOL)

    The Nigerian Society for Animal Production was inaugurated in March 1973 during the First International Symposium on Animal Production in the Tropics at the University of Ibadan, lbadan, Nigeria. This society is responsible for the publication of the Nigerian Journal of Animal Production (NJAP) which commenced ...

  7. Nigerian Journal of Surgical Research

    African Journals Online (AJOL)

    The Nigerian Journal of Surgical Research is a publication of the Surgical Research Society with main office in Zaria, Nigeria. Zaria is home to Ahmadu Bello University (ABU), a premier university in Nigeria. The aim of The Nigerian Journal of Surgical Research is to cover developments and advances in the broad field of ...

  8. Archives: Nigerian Journal of Physics

    African Journals Online (AJOL)

    Items 1 - 11 of 11 ... Archives: Nigerian Journal of Physics. Journal Home > Archives: Nigerian Journal of Physics. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. 1 - 11 of 11 Items ...

  9. Archives: Nigerian Journal of Fisheries

    African Journals Online (AJOL)

    Archives: Nigerian Journal of Fisheries. Journal Home > Archives: Nigerian Journal of Fisheries. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. 1 - 3 of 3 Items. 2008. Vol 5, No 2 ...

  10. Carbon nanotubes cement composites

    OpenAIRE

    Simone Musso; Jean-Marc Tulliani; Giuseppe Ferro

    2011-01-01

    The present paper reviews the current state of the art of carbon nanotubes cement-based composites and the possible applications. The influence of carbon nanotubes additions onto cement paste mechanical and electrical properties are discussed in detail. Though promising, several challenges have still to be solved before the introduction of these new materials into the public sphere through civil infrastructures.

  11. The Librarian in Nigerian Schools | Opeke | Nigerian School Library ...

    African Journals Online (AJOL)

    Nigerian School Library Journal. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 4, No 1&2 (2005) >. Log in or Register to get access to full text downloads.

  12. Nigerian Journal of Technology

    African Journals Online (AJOL)

    eobe

    Effects of Temperature Levels and Concrete Cover. Thickness on ... Concrete. K. A. Olonade, M.B. Kadiri and. P.O. Aderemi. 452. Mathematical Model for Prediction of Flexural Strength of. Mound Soil-Cement Blended Concrete. O. U. Orie and N. N. ... Optimal Selection of Hydraulic Turbines for Small Hydro. Electric Power ...

  13. ULTRA-LIGHTWEIGHT CEMENT

    Energy Technology Data Exchange (ETDEWEB)

    Fred Sabins

    2002-01-23

    The objective of this project is to develop an improved ultra-lightweight cement using ultra-lightweight hollow glass spheres (ULHS). This report includes results from laboratory testing of ULHS systems along with other lightweight cement systems: foamed and sodium silicate slurries. Comparison studies of the three cement systems examined several properties: tensile strength, Young's modulus, water permeability, and shear bond. Testing was also done to determine the effect that temperature cycling has on the shear bond properties of the cement systems. In addition, analysis was carried out to examine alkali silica reactivity of slurries containing ULHS. Data is also presented from a study investigating the effects of mixing and pump circulation on breakage of ULHS. Information is also presented about the field application of ULHS in cementing a 7-in. intermediate casing in south Texas.

  14. Nigerian Journal of Clinical Practice

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Practice. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 6, No 1 (2003) >. Log in or Register to get access to full text downloads.

  15. Nigerian Journal of Clinical Practice

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Practice. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 10, No 3 (2007) >. Log in or Register to get access to full text downloads.

  16. Nigerian Journal of Clinical Practice

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Practice. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 20, No 1 (2017) >. Log in or Register to get access to full text downloads.

  17. Nigerian Journal of Chemical Research

    African Journals Online (AJOL)

    The Nigerian Journal of Chemical Research is now abstracted by Chemical Abstract Service (CAS). The journal's target is to communicate annually results of researchers in the broad areas of Chemistry, namely Analyitcal; Inorganic; Organic; Physical and other subdivisions of Chemistry.

  18. Nigerian Hospital Practice: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Hospital Practice Journal serves in enhancing advancement of medicine globally, a medium for disseminating information about current clinical and drug practices in Nigeria and medical science world, and a medium for continued medical education.

  19. Nigerian Journal of Ophthalmology: Submissions

    African Journals Online (AJOL)

    Manuscripts must be prepared in accordance with "Uniform requirements for Manuscripts submitted to Biomedical Journals" developed by the International Committee of Medical Journal Editors (October 2008). The uniform requirements and specific requirement of Nigerian Journal of Ophthalmology are summarized below.

  20. Archives: Nigerian Journal of Physiological Sciences

    African Journals Online (AJOL)

    Items 1 - 19 of 19 ... Archives: Nigerian Journal of Physiological Sciences. Journal Home > Archives: Nigerian Journal of Physiological Sciences. Log in or Register to get access to full text downloads.

  1. Nigerian Journal of Plastic Surgery: Journal Sponsorship

    African Journals Online (AJOL)

    Nigerian Journal of Plastic Surgery: Journal Sponsorship. Journal Home > About the Journal > Nigerian Journal of Plastic Surgery: Journal Sponsorship. Log in or Register to get access to full text downloads.

  2. Nigerian Journal of Clinical Medicine: Journal Sponsorship

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Medicine: Journal Sponsorship. Journal Home > About the Journal > Nigerian Journal of Clinical Medicine: Journal Sponsorship. Log in or Register to get access to full text downloads.

  3. Nigerian Journal of Gastroenterology and Hepatology: Journal ...

    African Journals Online (AJOL)

    Nigerian Journal of Gastroenterology and Hepatology: Journal Sponsorship. Journal Home > About the Journal > Nigerian Journal of Gastroenterology and Hepatology: Journal Sponsorship. Log in or Register to get access to full text downloads.

  4. Archives: Nigerian Journal of Gastroenterology and Hepatology

    African Journals Online (AJOL)

    Items 1 - 15 of 15 ... Archives: Nigerian Journal of Gastroenterology and Hepatology. Journal Home > Archives: Nigerian Journal of Gastroenterology and Hepatology. Log in or Register to get access to full text downloads.

  5. Nigerian Journal of Soil Science: Journal Sponsorship

    African Journals Online (AJOL)

    Nigerian Journal of Soil Science: Journal Sponsorship. Journal Home > About the Journal > Nigerian Journal of Soil Science: Journal Sponsorship. Log in or Register to get access to full text downloads.

  6. Nigerian Journal of Animal Science: Journal Sponsorship

    African Journals Online (AJOL)

    Nigerian Journal of Animal Science: Journal Sponsorship. Journal Home > About the Journal > Nigerian Journal of Animal Science: Journal Sponsorship. Log in or Register to get access to full text downloads.

  7. Tympanoplasty with ionomeric cement

    DEFF Research Database (Denmark)

    Kjeldsen, A D; Grøntved, A M

    2000-01-01

    with isolated erosion of the long incus process have been treated with a new surgical technique in which the ossicular chain was rebuilt with ionomeric cement. The results in hearing performance (mean pure-tone average (PTA) 0.5, 1 and 2 kHz) were evaluated pre- and post-surgery, and compared to those...... of > 10 dB, in 4 there was a slight improvement and in 2 a decline. The difference was not statistically significant. Hearing improvement using ionomeric cement in type II tympanoplasty was satisfactory. Reconstruction of the ossicular chain with ionomeric cement is recommended, as the procedure is easy...

  8. Nigerian Music Review: About this journal

    African Journals Online (AJOL)

    Nigerian Music Reveiw. ... Advanced Search · USING AJOL · RESOURCES. Nigerian Music Review: About this journal. Journal Home > Nigerian Music Review: About this journal. Log in or Register to get access to full text downloads. Username, Password, Remember me ... People. » Contact. Policies. » Focus and Scope ...

  9. the Rising Profile of Modern Nigerian Art

    African Journals Online (AJOL)

    FIRST LADY

    2011-01-18

    Jan 18, 2011 ... Art Pricing and the Nigerian Economy, 1960-2008; the. Rising Profile of Modern Nigerian ... for a piece of painting by a Nigerian artist to be priced for so much as five hundred guineas(about five ..... up sculptural pieces, mural, or mosaic works on new buildings built all over the country. By beginning of the ...

  10. Nigerian Journal of Plastic Surgery: Submissions

    African Journals Online (AJOL)

    Author Guidelines. Instruction to authors The Nigerian Journal of Plastic Surgery is the official Journal of the Nigerian Association of Plastic Reconstructive and Aesthetic Surgeons and also of the Nigerian Burn Society. Its object is to publish original articles about developments in all areas related to plastic and ...

  11. [Allergy towards bone cement].

    Science.gov (United States)

    Thomas, P; Schuh, A; Summer, B; Mazoochian, F; Thomsen, M

    2006-09-01

    Bone cements based on polymethylmethacrylate are typically used for fixation of artificial joints. Intolerance reactions to endoprostheses not explained by infection or mechanical failure may lead to allergological diagnostics, which mostly focuses on metal allergy. However, also bone cement components may provoke hypersensitivity reactions leading to eczema, implant loosening, or fistula formation. Elicitors of such reactions encompass acrylates and additives such as benzoyl peroxide, N,N-dimethyl-p-toluidine, hydroquinone, or antibiotics (particularly gentamicin). Upon repeated contact with bone cement components, e.g., acrylate monomers, also in medical personnel occasionally hand eczema or even asthma may develop. Therefore, in the case of suspected hypersensitivity reactions to arthroplasty, the allergological diagnostics should include bone cement components.

  12. ULTRA-LIGHTWEIGHT CEMENT

    Energy Technology Data Exchange (ETDEWEB)

    Fred Sabins

    2001-10-23

    The objective of this project is to develop an improved ultra-lightweight cement using ultra-lightweight hollow glass spheres (ULHS). Work reported herein addresses tasks performed in the fourth quarter as well as the other three quarters of the past year. The subjects that were covered in previous reports and that are also discussed in this report include: Analysis of field laboratory data of active cement applications from three oil-well service companies; Preliminary findings from a literature review focusing on problems associated with ultra-lightweight cements; Summary of pertinent information from Russian ultra-lightweight cement literature review; and Comparison of compressive strengths of ULHS systems using ultrasonic and crush methods Results reported from the fourth quarter include laboratory testing of ULHS systems along with other lightweight cement systems--foamed and sodium silicate slurries. These comparison studies were completed for two different densities (10.0 and 11.5 lb/gal) and three different field application scenarios. Additional testing included the mechanical properties of ULHS systems and other lightweight systems. Studies were also performed to examine the effect that circulation by centrifugal pump during mixing has on breakage of ULHS.

  13. Effect of Palmyra Palm Leaf Ash on Cement Stabilization of Makurdi Shale

    Directory of Open Access Journals (Sweden)

    Amos Yala IORLIAM

    2012-08-01

    Full Text Available Makurdi Shale was treated with palmyra palm leaf ash (PPLA and cement to assess its suitability as a material in construction of flexible pavement. Classification, Compaction, Consistency, California bearing ratio (CBR and Unconfined compressive strength (UCS tests, were conducted on the shale specimen treated with, cement and PPLA in a combined incremental order of 2% up to 10% of cement and 2% up to 14% of PPLA of dry weight of soil sample respectively. Results of tests showed that Makurdi shale is an A-7-6, high plasticity (CH and high swell potential soil by the American Association of State Highway and Transportation Officials (AASHTO, Unified Soil Classification System (USCS and Nigerian Building and Road Research Institute (NBRRI classification systems respectively. The plasticity index (PI reduced from 30.5% for untreated Makurdi shale to 4% at 10% cement +14% PPLA contents. The maximum soaked CBR and 7 day UCS values of 92% and 1041 kN/m2 were obtained at 10% cement+14 % PPLA contents respectively. From the results, Makurdi shale treated with a combination of 10%cement+14% PPFA with a soaked CBR value of 92 %, 7 day UCS value of 1041 kN/m2 and 82 % value of resistance to loss in strength, satisfied the requirement for sub-base specification. It is therefore recommended for use as sub-base materials in flexible pavement.

  14. Optical cements for interferometric applications

    OpenAIRE

    Wimperis, J.R.; Johnston, Sean F.

    1984-01-01

    The wave front distortion introduced by optical cements\\ud is important in interferometric applications. We describe\\ud here tests performed to characterize two common cements,\\ud Epo-Tek 301 and Norland Optical Adhesive 61.

  15. PART II. HYDRATED CEMENTS

    Directory of Open Access Journals (Sweden)

    Milan Drabik

    2014-09-01

    Full Text Available Essential focus of the study has been to acquire thermoanalytical events, incl. enthalpies of decompositions - ΔH, of technological materials based on two types of Portland cements. The values of thermoanalytical events and also ΔH of probes of technological compositions, if related with the data of a choice of minerals of calcium-silicate-sulfate-aluminate hydrates, served as a valued input for the assessment of phases present and phase changes due to the topical hydraulic processes. The results indicate mainly the effects of "standard humidity" or "wet storage" of the entire hydration/hydraulic treatment, but also the presence of cement residues alongside calcium-silicate-sulfate-aluminate hydrates (during the tested period of treatment. "A diluting" effect of unhydrated cement residues upon the values of decomposition enthalpies in the studied multiphase system is postulated and discussed

  16. Promoting Reading Culture in Nigerian Children | Saka | Nigerian ...

    African Journals Online (AJOL)

    The study was to determine the promotion of reading culture among Nigerian children with special emphasis on primary schools in all the five (5) Federal parastatals in Minna metropolis. The study was to determine why, where, problems and strategies for promoting reading culture of primary school children. Survey ...

  17. Soil Radon In The Nigerian Younger Granites | Dewu | Nigerian ...

    African Journals Online (AJOL)

    ... not had enough time to attain equilibrium with its daughters. In general, the results suggest that with proper control, soil radon measurements over the Younger Granite can be used for uranium exploration in the region. Keywords: Radon, younger granite, soil uranium, half-lifeand thorium. Nigerian Journal of Physics Vol.

  18. Ocular changes in pregnant Nigerian women | Ebeigbe | Nigerian ...

    African Journals Online (AJOL)

    Objective: Pregnancy results in a lot of hormonal changes in the body and the eyes are no exception. These ocular changes could be physiologic, pathologic or a modification of a pre-existing condition. The aim of this study was to determine physiologic ocular changes that are associated with pregnancy in healthy Nigerian ...

  19. Eye Care Preferences Among Rural Nigerians | Omolase | Nigerian ...

    African Journals Online (AJOL)

    This is a cross sectional community based study that determined the eye care seeking dispositions of the adult Nigerians using the inhabitants of Afon a rural community in Kwara State, Nigeria as a case study. A total of three hundred and thirty nine (339) adult inhabitants of the Community were selected using cluster ...

  20. Cranial nerve palsies in Nigerian children | Eyong | Nigerian Journal ...

    African Journals Online (AJOL)

    Background: Cranial nerve palsies are common clinical problem routinely encountered in neurological practice; the dysfunction can occur at any point in the course of the nerve and may point to serious pathology. The aim of this study was to determine the pattern and underlying aetiology of cranial nerve palsies in Nigerian ...

  1. Willingness of Nigerians to Donate a Kidney | Adekoya | Nigerian ...

    African Journals Online (AJOL)

    Background: Kidney transplantation is a popular modality of RRT in the developed world. Objective: To assess the willingness of the general population of Nigerians across the country to donate a kidney. Methods: This is a multiregional, cross sectional, questionnaire based study. One thousand Three hundred respondents ...

  2. Corneal ulcers at a Nigerian eye hospital | Nwosu | Nigerian Journal ...

    African Journals Online (AJOL)

    Nigerian Journal of Surgical Research. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 5, No 3 (2003) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected ...

  3. Lactating Vulva Mammary Tissue in a Nigerian | Igwegbe | Nigerian ...

    African Journals Online (AJOL)

    ... cystic mass in the right labium majus that developed rapidly in the early puerperium following her 5th confinement. Histology of the completely excised cyst revealed a secretory mammary tissue. There was no recurrence ten months after surgery while breastfeeding. Key Words: lactation, vulva, Mammary tissue, Nigerian

  4. Cement og politik

    DEFF Research Database (Denmark)

    Lund, Joachim

    2012-01-01

    as well as in the public sphere. Most of the extensive job creating measures he carried out as a minister for public works necessarily involved the use of great amounts of cement – the primary produce of F.L. Smidth & Co. Gunnar Larsen thus became an easy target for Communist propaganda, picturing him...... of the Soviet Union (including an F.L. Smidth & Co. cement plant in former Estonia). He spent the last 15 months of the occupation in Sweden and was arrested after having returned to Copenhagen in May, 1945. Although a Copenhagen city court prison sentence for economic collaboration was reversed, he had...

  5. Technology Roadmaps: Cement

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    To support its roadmap work focusing on key technologies for emissions reductions, the International Energy Agency (IEA) also investigated one particular industry: cement. Cement production includes technologies that are both specific to this industry and those that are shared with other industries (e.g., grinding, fuel preparation, combustion, crushing, transport). An industry specific roadmap provides an effective mechanism to bring together several technology options. It outlines the potential for technological advancement for emissions reductions in one industry, as well as potential cross-industry collaboration.

  6. Cement Mason's Curriculum. Instructional Units.

    Science.gov (United States)

    Hendirx, Laborn J.; Patton, Bob

    To assist cement mason instructors in providing comprehensive instruction to their students, this curriculum guide treats both the skills and information necessary for cement masons in commercial and industrial construction. Ten sections are included, as follow: related information, covering orientation, safety, the history of cement, and applying…

  7. Reducing cement's CO2 footprint

    Science.gov (United States)

    van Oss, Hendrik G.

    2011-01-01

    The manufacturing process for Portland cement causes high levels of greenhouse gas emissions. However, environmental impacts can be reduced by using more energy-efficient kilns and replacing fossil energy with alternative fuels. Although carbon capture and new cements with less CO2 emission are still in the experimental phase, all these innovations can help develop a cleaner cement industry.

  8. Cementing a wellbore using cementing material encapsulated in a shell

    Energy Technology Data Exchange (ETDEWEB)

    Aines, Roger D.; Bourcier, William L.; Duoss, Eric B.; Floyd, III, William C.; Spadaccini, Christopher M.; Vericella, John J.; Cowan, Kenneth Michael

    2017-03-14

    A system for cementing a wellbore penetrating an earth formation into which a pipe extends. A cement material is positioned in the space between the wellbore and the pipe by circulated capsules containing the cement material through the pipe into the space between the wellbore and the pipe. The capsules contain the cementing material encapsulated in a shell. The capsules are added to a fluid and the fluid with capsules is circulated through the pipe into the space between the wellbore and the pipe. The shell is breached once the capsules contain the cementing material are in position in the space between the wellbore and the pipe.

  9. The mechanical effect of the existing cement mantle on the in-cement femoral revision.

    LENUS (Irish Health Repository)

    Keeling, Parnell

    2012-08-01

    Cement-in-cement revision hip arthroplasty is an increasingly popular technique to replace a loose femoral stem which retains much of the original cement mantle. However, some concern exists regarding the retention of the existing fatigued and aged cement in such cement-in-cement revisions. This study investigates whether leaving an existing fatigued and aged cement mantle degrades the mechanical performance of a cement-in-cement revision construct.

  10. Nigerian Journal of Physiological Sciences

    African Journals Online (AJOL)

    Nigerian Journal of Physiological Sciences (Niger. J. Physiol. Sci.) is a biannual publication of the Physiological Society of Nigeria. It covers diverse areas of research in physiological sciences, publishing reviews in current research areas and original laboratory and clinical research in physiological sciences. Other websites ...

  11. Nigerian Journal of Animal Science

    African Journals Online (AJOL)

    The Nigerian Journal of Animal Science (NJAS) is an official publication of the Animal Science Association of Nigeria (ASAN) that is published twice a year in two issues. The Journal publishes carefully peer-reviewed original research articles on various farm and laboratory animals covering diverse areas such as ...

  12. STOCHASTIC ASSESSMENT OF NIGERIAN STOCHASTIC ...

    African Journals Online (AJOL)

    eobe

    four Nigerian timbers (namely EKKI, APA, IROKO and. ABURA) for bridge decks was executed in relation to. Equation (1) by ASMRA method using JAVA library with the help of Flanagan polynomial. The results obtained are displayed in Table 3.The safety index, β, is as obtained from the execution of ASMRA while.

  13. Nigerian Journal of Pharmaceutical Research

    African Journals Online (AJOL)

    The Nigerian Journal of Pharmaceutical Research publishes scientific work in all areas of Pharmaceutical and life sciences, including (but not restricted to): medicinal plant research; herbal medicines and cosmetics; development of drugs and pharmaceuticals; quality assurance of drugs; safety and efficacy of drugs; ...

  14. Nigerian Journal of Technological Development

    African Journals Online (AJOL)

    The Nigerian Journal of Technological Development is now a quarterly publication of the Faculty of Engineering & Technology, University of Ilorin, Ilorin, Nigeria. It publishes original high-quality articles focusing on all aspects of Engineering and Applied Sciences in March, June, September and December. Manuscripts are ...

  15. Nigerian Journal of Technology: Submissions

    African Journals Online (AJOL)

    This article acts as the template for preparing articles for submission to Nigerian Journal of Technology. The abstract should be a clear statement defining the problems of study, methodology adopted, results and conclusions. Please do not refer readers to other literature articles in the abstract. The abstract should be brief ...

  16. Nigerian Journal of Clinical Medicine

    African Journals Online (AJOL)

    The Nigerian Journal of Medicine (NJCM) is a biannual journal of the Association of Resident Doctors of the Lagos State University Teaching Hospital, which hopes to provide a platform for medical researchers to make contributions that advances/illuminates medical science or practice in all its spheres.

  17. Nigerian Music Review: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. Nigerian Music Review is aimed at the scholarly review of the developments in various musical practices in Nigeria. It considers well researched articles in any of the following areas: Musicology, Ethnomusicology, African Music, Music Education, Performance, Composition, Music Technology, Music ...

  18. Nigerian Journal of General Practice

    African Journals Online (AJOL)

    Journal Homepage Image. The Nigerian Journal of General Practice is the official publication of the Association of General and Private Medical Practitioners of Nigeria. It is a multi-disciplinary, biannual, peer-reviewed biomedical journal that has been published since 1985. It invites scholarly manuscripts relevant to the ...

  19. Nigerian Journal of Economic History

    African Journals Online (AJOL)

    The Nigerian Journal of Economic History (NJEH) seeks to promote the scholarly study of Africa's and the developing world's past economic issues and events from a diversity of perspectives notably those of History, Economics, and other relevant disciplines. The Journal, which encourages careful formulation of issues and ...

  20. Annals of Nigerian Medicine: Submissions

    African Journals Online (AJOL)

    Author Guidelines. Information for Authors The Annals of Nigerian Medicine subscribes to the 'Uniform Requirements for manuscripts submitted to Biomedical Journals' ... original unpublished material and are not under consideration for publication elsewhere and the studies have been subject to appropriate ethical review.

  1. Nigerian Journal of Nutritional Sciences

    African Journals Online (AJOL)

    The Nigerian Journal of Nutritional Sciences (ISSN 0189-0913), official Journal of the Nutrition Society of Nigeria, is a peer-reviewed publication and is published biannually, two volumes per year. The primary focus of the journal is the publication of basic and applied studies in nutritional sciences and related fields.

  2. Language and Culture: Nigerian Perspective

    African Journals Online (AJOL)

    DrNneka

    The relationship between the English language and Nigerian cultures are similar to the above since many English loan ... British spellings, slangs, pronunciation and diction. This issue has become the fashion of .... Implications for Language Teaching and Language Policy in Nigeria. The implications of language being ...

  3. Nigerian Food Journal: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Food Journal (NIFOJ) is a journal of international standard established in 1983 to provide a forum for the dissemination of interdisciplinary knowledge on all aspects of food science and technology. In particular, NIFOJ is designed to contribute towards the development of new and improved ...

  4. Nigerian Journal of Clinical Practice

    African Journals Online (AJOL)

    The Nigerian Journal of Clinical Practice is the official publication of the Medical and Dental Consultants Association of Nigeria (MDCAN) established in 1997 and published ... Evaluation of Candida Albicans Biofilm Formation on Various Parts of Implant Material Surfaces · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  5. Nigerian Journal of Plastic Surgery

    African Journals Online (AJOL)

    The Nigerian Journal of Plastic Surgery has its objectives in publishing original articles about developments in all areas related to plastic and reconstructive surgery as well as to trauma surgery. It also serves as a means of providing a forum for correspondence, information and discussion. It also accepts review articles that ...

  6. Magnesium oxychloride cement concrete

    Indian Academy of Sciences (India)

    TECS

    ting. It is used in industrial floorings, ship decks, railway passenger coach floorings, hospital floors, ammunition factory floors, missile silos and underground armament factories and bunkers. Recently, concrete of high compres- sive and tensile strength prepared with magnesium oxy- chloride cement and recycled rubber ...

  7. Ghana: Background and U.S. Relations

    Science.gov (United States)

    2009-07-08

    rubber, oil palm, soy, fruit, shea nut, timber, and coconut crop sectors, along with bio-fuel and medicinal plants and fisheries , are especially...28 West African Gas Pipeline Company (WAPCo), “First Gas Reaches Ghana,” December 11, 2008; Kwasi Kpodo, “Ghana pipeline gets first Nigerian gas

  8. Is your cement sheath stressed?

    Energy Technology Data Exchange (ETDEWEB)

    DeBruijn, G. [Schlumberger Well Cementing Services Canada, Calgary, AB (Canada)

    2007-07-01

    Wells are cemented for several reasons, most notably to provide zonal isolation; support the casing's axial load; maintain wellbore integrity; protect groundwater; and protect the casing from corrosion. This presentation addressed some of the concerns regarding the development of tensile cracks when drilling in high temperature high pressure wells during steam stimulation. Flexible cement solutions were also provided along with their key technical specifications. Simulations of cement sheath stress have shown that a cement system can operate in a dynamic stress environment if an optimized blend is used. Cement stress simulation enables the evaluation of zonal isolation risks. The paper indicated that of the 6 steam assisted gravity drainage (SAGD) wells in Canada that have used a flexible and expandable cement solution system developed by Schlumberger Well Cementing Services, none have shown signs of casing gas vent flow at surface. figs.

  9. Microleakage of orthodontic band cement at the cement-enamel and cement-band interfaces.

    Science.gov (United States)

    Uysal, Tancan; Ramoglu, Sabri Ilhan; Ertas, Huseyin; Ulker, Mustafa

    2010-04-01

    Our objective was to determine and compare microleakage patterns of conventional glass ionomer cement (GIC), resin modified GIC (RMGIC), and polyacid-modified composite for band cementation. Sixty freshly extracted third molars were randomly divided into 3 groups of 20 teeth each. Microetched molar bands in the 3 groups were cemented to enamel with one of three orthodontic cements: Ketac-Cem (3M ESPE, Gmbh, Seefeld, Germany), Multi-Cure (3M Unitek, Monrovia, Calif), and Transbond Plus (3M Unitek). A dye penetration method was used for microleakage evaluation. Microleakage was determined by a stereomicroscope for the cement-band and cement-enamel interfaces from both the buccal and lingual margins. Statistical analysis was performed with Kruskal-Wallis and Mann-Whitney U tests. The buccal sides had similar microleakage values compared with the lingual sides for the cement-enamel and cement-band interfaces with all cements. Statistical comparisons showed statistically significant differences among the band cements between both interfaces (P <0.001). When the cement systems were compared, conventional GIC showed the highest leakage scores between cement-band (median, 3.50 mm) and cement-enamel (median, 2.88 mm) interfaces. Teeth banded with RMGIC and modified composite showed similar microleakage scores, and both had less leakage (<1 mm) than conventional GIC. Conventional GIC is associated with more microleakage than RMGIC and modified composite at both the cement-band and cement-enamel interfaces. Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.

  10. The effect of cement creep and cement fatigue damage on the micromechanics of the cement-bone interface.

    NARCIS (Netherlands)

    Waanders, D.; Janssen, D.; Mann, K.A.; Verdonschot, N.J.J.

    2010-01-01

    The cement-bone interface provides fixation for the cement mantle within the bone. The cement-bone interface is affected by fatigue loading in terms of fatigue damage or microcracks and creep, both mostly in the cement. This study investigates how fatigue damage and cement creep separately affect

  11. Rebranding Nigerian Arts In The Twilight Of Economic Meltdown ...

    African Journals Online (AJOL)

    This paper critically discuss what branding is all about, Economic Melt Down and the Nigerian Arts, strategies to re-branding Nigerian Arts, and Analyzes some of the problems and challenges Nigerian Arts faces and concludes with how. Nigerian Arts should take her place in this new face of Nigeria in an era as this, when ...

  12. Composing in Nigerian Pidgin: Towards the Realization of a ...

    African Journals Online (AJOL)

    ... Ezenwa Ohaeto (of blessed memory) have made several efforts towards the actualization of a central/common language (Nigerian Pidgin) in Nigeria through associating their works with Nigerian imaginative activity and presenting them in Nigerian Pidgin. Recently, Alvan-Ikoku Nwamara, a Nigerian contemporary music ...

  13. QT Dispersion in Healthy Adult Nigerians | Ale | Nigerian Quarterly ...

    African Journals Online (AJOL)

    QTd was independent of age (p= 0.86), sex (p= 0.97), heart rate (p=0.22), blood pressure (p > 0.05), BMI (p=0.81), QTc (p=0.41), LVH (ECG and echo) and LV systolic function (p>0.05). Conclusion: QT dispersion is independent of demographic parameters, LV systolic function and LV hypertrophy in healthy adult Nigerians.

  14. Malignant mastocytoma in a Nigerian local dog | Shoyinka | Nigerian ...

    African Journals Online (AJOL)

    No Abstract. Nigerian Veterinary Journal Vol. 26 (2) 2005: pp. 45-50. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.4314/nvj.v26i2.3491 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors ...

  15. Mineral resource of the month: hydraulic cement

    Science.gov (United States)

    van Oss, Hendrik G.

    2012-01-01

    Hydraulic cements are the binders in concrete and most mortars and stuccos. Concrete, particularly the reinforced variety, is the most versatile of all construction materials, and most of the hydraulic cement produced worldwide is portland cement or similar cements that have portland cement as a basis, such as blended cements and masonry cements. Cement typically makes up less than 15 percent of the concrete mix; most of the rest is aggregates. Not counting the weight of reinforcing media, 1 ton of cement will typically yield about 8 tons of concrete.

  16. INORGANIC CEMENT CONCRETE

    Directory of Open Access Journals (Sweden)

    Alisson Clay Rios Silva

    2014-07-01

    Full Text Available In this work, a Geopolymeric Cement Concrete (GCC was developed through adequate portions of geopolymer components. Its characteristics were compared with Portland Cement Concrete (PCC, through of the establishment of some parameters of design, as consumption of binders, water/aggregates ratio and mortar content. The concrete mechanical performance was evaluated with emphasis to the fatigue behavior. Were tested the effects of different tensile strength maximum (increasing and decreasing. The results of fatigue tests had shown that GCC presents a better performance when compared to PCC. Its fatigue strength was 15% higher than that of PCC, when 70% of rupture tension of the concrete in static bending (SR, was applied. Tensions of about 80% SR resulted in 96% of increase, when compared to GCC. The SEM microstructural analysis showed that the GCC has a matrix/aggregate bonding very strong, when compared to PCC, probably due to the massive nature of the geopolymeric matrix.

  17. US cement industry

    Energy Technology Data Exchange (ETDEWEB)

    Nisbet, M.A.

    1997-12-31

    This paper describes the cement and concrete industry, and provides data on energy use and carbon dioxide emissions. The potential impact of an energy tax on the industry is briefly assessed. Opportunities identified for reducing carbon dioxide emissions include improved energy efficiency, alternative fuels, and alternative materials. The key factor in determining CO{sub 2} emissions is the level of domestic production. The projected improvement in energy efficiency and the relatively slow growth in domestic shipments indicate that CO{sub 2} emissions in 2000 should be about 5% above the 1990 target. However, due to the cyclical nature of cement demand, emissions will probably be above target levels during peak demand and below target levels during demand troughs. 7 figs., 2 tabs.

  18. Performance of Cement Containing Laterite as Supplementary Cementing Material

    Directory of Open Access Journals (Sweden)

    Abbas Bukhari, Z. S.

    2013-03-01

    Full Text Available The utilization of different industrial waste, by-products or other materials such as ground granulated blast furnace slag, silica fume, fly ash, limestone, and kiln dust, etc. as supplemen- tary cementing materials has received considerable attention in recent years. A study has been conducted to look into the performance of laterite as Supplementary Cementing Materials (SCM. The study focuses on compressive strength performance of blended cement containing different percentage of laterite. The cement is replaced accordingly with percentage of 2 %, 5 %, 7 % and 10 % by weight. In addition, the effect of use of three chemically different laterites have been studied on physical performance of cement as in setting time, Le-Chatlier expansion, loss on ignition, insoluble residue, free lime and specifically compressive strength of cement cubes tested at the age of 3, 7, and 28 days. The results show that the strength of cement blended with laterite as SCM is enhanced. Key words: Portland cement, supplementary cementing materials (SCM, laterite, compressive strength KUI – 6/2013 Received January 4, 2012 Accepted February 11, 2013

  19. Contemporary compositional procedures in Nigerian music practices

    African Journals Online (AJOL)

    It concludes that Africans including Nigerians should disabuse their minds and musical sensibility from the Western classical idioms and terminologies and be proud of all African music which identify us as a people with rich music culture. Keywords: compositional, techniques, performance, practices, styles, Nigerian music ...

  20. Nigerian Endocrine Practice: About this journal

    African Journals Online (AJOL)

    Nigerian Endocrine Practice: About this journal. Journal Home > Nigerian Endocrine Practice: About this journal. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. People. » Contact ...

  1. Predictors of Burnout Syndrome Among Nigerian Physiotherapists ...

    African Journals Online (AJOL)

    The purpose of this study is to find the association between some factors such as job satisfaction, victimization, proper remuneration, fear of workplace , and poor work environment with burnout syndrome among Nigerian physiotherapists. A total of 201 registered Nigerian physiotherapists (104 male and 97 female) ...

  2. Psychological Facilitation of Academic Achievement of Nigerian ...

    African Journals Online (AJOL)

    ... study habits and skills. Be that as it may, the current paper would remedy to some extent the oversight by offering the insights into some psychological principles and techniques that can facilitate academic achievement of Nigerian students. Nigerian Journal of Clinical and Counselling Psychology Vol.8(1) 2002: 1-14 ...

  3. Nigerian Journal of Surgical Research: Editorial Policies

    African Journals Online (AJOL)

    The Nigerian Journal of Surgical Research is a publication of the Surgical Research Society with main office in Zaria, Nigeria. Zaria is home to Ahmadu Bello University (ABU), a premier university in Nigeria. The aim of The Nigerian Journal of Surgical Research is to cover developments and advances in the broad field of ...

  4. Religion, tolerance and national development: The Nigerian ...

    African Journals Online (AJOL)

    It is a fact that the fear of religious intolerance seems to grip the Nigerian nation as a fear of an epidemic. It is not that the problem is restricted to Nigeria, as other countries of the world have had or are having their fair share of this ugly malady. However, the Nigerian situation is peculiar, regarded sometimes as worst ...

  5. Cultural Representation and Intercultural Interaction: Nigerian ...

    African Journals Online (AJOL)

    Using some Nollywood films as primary data, I intend to examine the image representation of the traditional and Western Nigerian in Nollywood. This paper intends to find out to what extent intercultural interactions can “transform” the Nigerian woman and still leave her “acceptable” in the light of the cultures and traditions.

  6. Nigerian Journal of Soil and Environmental Research

    African Journals Online (AJOL)

    The Nigerian Journal of Soil and Environmental Research (previously named Nigerian Journal of Soil Research) is an annual publication of the Department of Soil science, Faculty of Agriculture/Institute for Agricultural Research, Ahmadu Bello University, Zaira. The journal accepts articles in English. The journal is ...

  7. Occupational Stress among Nigerian Police Officers: An ...

    African Journals Online (AJOL)

    Nneka Umera-Okeke

    For example, a flight attendant might normally encounter stress associated with travels at great heights on airplanes for many hours, and a police officer ... In spite of the enormous risk the Nigerian police officers bear to do their jobs, an average policeman is not appreciated in the Nigerian society; he is often criticized and ...

  8. Nigerian cultural heritage: preservation, challenges and prospects ...

    African Journals Online (AJOL)

    This paper derives from a functionalist perspective which descriptively presents a historical, anthropological, and archaeological account of the Nigerian cultural heritage. Efforts at preserving these heritages are obstructed with daunting challenges, particularly human activities such as trafficking and exportation of Nigerian ...

  9. Policy and Management Issues in Contemporary Nigerian ...

    African Journals Online (AJOL)

    ... policy and management issues in contemporary Nigerian education system. Through rigorous intellectual analysis of the major segments of the Nigerian education system comprising pre-primary, primary/basic education, secondary education and tertiary education, it was observed that government.s efforts and gestures ...

  10. Archives: Nigerian Journal of Clinical Practice

    African Journals Online (AJOL)

    Items 1 - 50 of 72 ... Archives: Nigerian Journal of Clinical Practice. Journal Home > Archives: Nigerian Journal of Clinical Practice. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives ...

  11. revolutionary trends in nigerian contemporary gospel music

    African Journals Online (AJOL)

    Although human beings do not change, their cultures, practices, arts and technology do change from time to time. In this paper, an attempt is made to highlight and elucidate various radical changes that have occurred in Nigerian gospel music (a bona-fide Nigerian artistic genre) in recent years and the factors responsible ...

  12. Archives: Nigerian Journal of Family Practice

    African Journals Online (AJOL)

    Items 1 - 14 of 14 ... Archives: Nigerian Journal of Family Practice. Journal Home > Archives: Nigerian Journal of Family Practice. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives ...

  13. Alcohol use disorders among Nigerian University students ...

    African Journals Online (AJOL)

    Conclusions Alcohol use disorders are common among Nigerian college students. Effective methods of early identification and forms of anti-alcoholic education are needed. Parental drinking habits and religiosity will have to be considered while planning intervention and preventive strategies. Nigerian Journal of Psychiatry ...

  14. Lymphoreticular diseases in Nigerians | Adelusola | African Health ...

    African Journals Online (AJOL)

    The most common finding in the spleen was splenic rupture and haemoperitoneum from road traffic accident. Conclusion: NHL and tuberculosis should be high on the list of differential diagnosis of lymphadenopathy in Nigerians. Whereas trauma from RTA was the major reason for splenectomy in Nigerians, in the elderly ...

  15. Fibrous dysplasia of the jaws in Nigerians.

    Science.gov (United States)

    Daramola, J O; Ajagbe, H A; Obisesan, A A; Lagundoye, S B; Oluwasanmi, J O

    1976-09-01

    The clinicoradiologic features and surgical treatment of fibrous dysplasia of the jaws in forty-seven Nigerian patients are described. Marked facial deformity and functional disturbances were the main indications for operation. We noticed one case of malignant transformation. It is our opinion that a more-than-usual aggressive excision is indicated in Nigerian patients.

  16. Revamping Nigerian Economy through Cassava Production ...

    African Journals Online (AJOL)

    The main kernel of this paper is on revamping Nigerian economy through cassava production. The title of the paper is quite appropriate because of the economic morass Nigeria is currently enveloped. This was as a result of the vagaries price of crude oil in the international market. The Nigerian economy have nosedived ...

  17. Archives: Nigerian Journal of Soil Science

    African Journals Online (AJOL)

    Archives: Nigerian Journal of Soil Science. Journal Home > Archives: Nigerian Journal of Soil Science. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives. 1 - 4 of 4 Items. 2009 ...

  18. MARXIST CRAFTSMANSHIP IN NIGERIAN DRAMA: AN ...

    African Journals Online (AJOL)

    The most cursory look at Nigerian dramatic literature reveals that the Marxist ideology provides a broad field for a good number of Nigerian playwrights. One possible explanation for this is that the writers, products of a society which had witnessed and continues to witness different socio-political injustices, find in it a potent ...

  19. [Haemotoxicity of dental luting cements].

    Science.gov (United States)

    Anders, A; Welker, D

    1989-06-01

    A glass ionomer luting cement (AquaCem) shows a relatively low haemolytic activity in comparison with two zinc phosphate cements. Especially the initial irritation by this cement is smaller. Although it is possible that AquaCem particularly, in unfavourable cases, may damage the pulpa dentin system; this is due to the slowly decrease of the haemolytic activity with increasing of the probes. We found that Adhesor showed in dependence of the batches a varying quality.

  20. Thermal Shock-resistant Cement

    Energy Technology Data Exchange (ETDEWEB)

    Sugama T.; Pyatina, T.; Gill, S.

    2012-02-01

    We studied the effectiveness of sodium silicate-activated Class F fly ash in improving the thermal shock resistance and in extending the onset of hydration of Secar #80 refractory cement. When the dry mix cement, consisting of Secar #80, Class F fly ash, and sodium silicate, came in contact with water, NaOH derived from the dissolution of sodium silicate preferentially reacted with Class F fly ash, rather than the #80, to dissociate silicate anions from Class F fly ash. Then, these dissociated silicate ions delayed significantly the hydration of #80 possessing a rapid setting behavior. We undertook a multiple heating -water cooling quenching-cycle test to evaluate the cement’s resistance to thermal shock. In one cycle, we heated the 200 and #61616;C-autoclaved cement at 500 and #61616;C for 24 hours, and then the heated cement was rapidly immersed in water at 25 and #61616;C. This cycle was repeated five times. The phase composition of the autoclaved #80/Class F fly ash blend cements comprised four crystalline hydration products, boehmite, katoite, hydrogrossular, and hydroxysodalite, responsible for strengthening cement. After a test of 5-cycle heat-water quenching, we observed three crystalline phase-transformations in this autoclaved cement: boehmite and #61614; and #61543;-Al2O3, katoite and #61614; calcite, and hydroxysodalite and #61614; carbonated sodalite. Among those, the hydroxysodalite and #61614; carbonated sodalite transformation not only played a pivotal role in densifying the cementitious structure and in sustaining the original compressive strength developed after autoclaving, but also offered an improved resistance of the #80 cement to thermal shock. In contrast, autoclaved Class G well cement with and without Class F fly ash and quartz flour failed this cycle test, generating multiple cracks in the cement. The major reason for such impairment was the hydration of lime derived from the dehydroxylation of portlandite formed in the autoclaved

  1. [Thermal diffusivity of dental cements].

    Science.gov (United States)

    Paroussis, D; Kakaboura, A; Chrysafidis, C; Mauroyiannakis, E

    1990-08-01

    Thermal insulative efficiency, is one of the desirable properties of the dental cements. In this study, the thermal diffusivity of three types of dental cements, were measured. Thermal diffusivity was determined by the following method. Two thermo-couples were used and connected to a chart record, the first was embedded in the cylindrical block of the cement specimen and the other in a mixing of ice and water (reference thermocouple). All them were set in a apparatus consisting of a double cooling bath. Calculation of thermal diffusivity were based on the curve provided of the record during cooling of the cement and a theoretical mathematic model. Values were ranged from 2,985 to 3,934 cm2.sec-1. ZOE cement exhibited the highest value, the glass-ionomers the lowest and the poly-carboxylates were average. The results showed that the thermal diffusivity of the cements is dependent from the type of the cement but the differences between them were not statistically significant. Additionally, the values obtained were about the same as the dentin, so the dental cements may consider as good thermal insulators.

  2. Nigerian Unity: In the Balance

    Science.gov (United States)

    2013-06-01

    with China , in particular, achieving notable success.2 In rough tandem with its global role, Sub-Saharan Africa’s significance to the United States has...with the produc- 30 tion of petroleum-derived chemicals and fertilizers, paper and pulp, steel, cement, textiles, beverages , food stuffs, and

  3. 76 FR 76760 - Gray Portland Cement and Cement Clinker From Japan

    Science.gov (United States)

    2011-12-08

    ... Portland Cement and Cement Clinker From Japan Determination On the basis of the record \\1\\ developed in the... antidumping duty order on gray Portland cement and cement clinker from Japan would be likely to lead to... the Commission are contained in USITC Publication 4281 (December 2011), entitled Gray Portland Cement...

  4. 21 CFR 888.4200 - Cement dispenser.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Cement dispenser. 888.4200 Section 888.4200 Food... DEVICES ORTHOPEDIC DEVICES Surgical Devices § 888.4200 Cement dispenser. (a) Identification. A cement dispenser is a nonpowered syringe-like device intended for use in placing bone cement (§ 888.3027) into...

  5. Implementing comprehensive sexuality education fot the Nigerian ...

    African Journals Online (AJOL)

    Nigerian adolescents like their peers elsewhere require information, education and communication on sexuality, body changes, gender and psychosocial ... policy, guidelines, Nigeria, Reproductive health, adolescents, Family life education (FLE), ABC approach, abstinence, curriculum, Youths, Teenagers, Abortion, AIDS.

  6. Geological mapping using fractal technique | Lawal | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Physics. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 18, No 2 (2006) >. Log in or Register to get access to full text downloads.

  7. Congenital anophthalmos in Benin City | Okeigbemen | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Ophthalmology. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 22, No 1 (2014) >. Log in or Register to get access to full text downloads.

  8. Community ophthalmology | Bekibele | Nigerian Journal of ...

    African Journals Online (AJOL)

    Nigerian Journal of Ophthalmology. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 22, No 3 (2014) >. Log in or Register to get access to full text downloads.

  9. Nigerian Journal of Biotechnology - Vol 33 (2017)

    African Journals Online (AJOL)

    Screening of endophytic plant growth-promoting bacteria isolated from two Nigerian rice varieties ... Optimization of biodiesel production from castor oil by response surface ... Nitrogen fixation and nodulation of soybean as affected by rhizobial ...

  10. Democracy, Development and Insurgency: The Nigerian Experience ...

    African Journals Online (AJOL)

    . 10, No. 3, September. Onilusi, M. (2014). Africa largest economy world's poorest people: paradox of the nigerian state in a democracy. 14th International Academic. Conference, Malta, 28 October pp. 343-360. Oropo, K. T. (2015). Chronology ...

  11. Editorial | Nwokediuko | Nigerian Journal of Gastroenterology and ...

    African Journals Online (AJOL)

    Nigerian Journal of Gastroenterology and Hepatology. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 8, No 2 (2016) >. Log in or Register to get access to full text downloads.

  12. Comparative fatigue behavior of different bone cements.

    Science.gov (United States)

    Gates, E I; Carter, D R; Harris, W H

    1984-10-01

    Tensile and fatigue studies were performed on four different preparations of acrylic bone cement: (1) surgical Simplex-P inserted into molds in the dough stage, (2) Zimmer Low Viscosity Cement (LVC) inserted in the liquid phase, (3) an experimental cement inserted in the dough phase, and (4) the same experimental cement inserted in the liquid phase. The void characteristics of the cements appeared to dictate their mechanical performance. While tests revealed no difference in the tensile strengths of the four cement preparations, small but statistically significant differences in mean fatigue life were observed. The experimental cement used in the dough stage exhibited superior fatigue characteristics when compared with Simplex and LVC. LVC had the poorest mechanical properties of the four cement groups. Since the specimen preparation procedures can markedly influence the cement void characteristics and, consequently, the mechanical properties, general statements about different cement types are offered with considerable reservations.

  13. Nigerian Journal of Basic and Applied Sciences: About this journal

    African Journals Online (AJOL)

    Nigerian Journal of Basic and Applied Sciences: About this journal. Journal Home > Nigerian Journal of Basic and Applied Sciences: About this journal. Log in or Register to get access to full text downloads.

  14. Archives: Nigerian Journal of Basic and Applied Sciences

    African Journals Online (AJOL)

    Items 1 - 20 of 20 ... Archives: Nigerian Journal of Basic and Applied Sciences. Journal Home > Archives: Nigerian Journal of Basic and Applied Sciences. Log in or Register to get access to full text downloads.

  15. structural reliability of the nigerian grown abura timber bridge beam

    African Journals Online (AJOL)

    ENGR. J. I. AGUWA

    2013-07-02

    Jul 2, 2013 ... Structural analysis and deterministic design of a timber bridge ... developed and used for reliability analysis of the Nigerian grown Abura timber bridge beam so designed, to ..... Nigerian Standard Organization, Federal.

  16. Socio- Emotional Intelligence Status of some Nigerian in- School ...

    African Journals Online (AJOL)

    school pre-adolescents in selected Nigerian primary and junior secondary schools .This is with a view to making concerned people understand and appreciate the perennial reports of poor socio-emotional responses of Nigerian adolescents ...

  17. Journal of the Nigerian Association of Mathematical Physics: Contact

    African Journals Online (AJOL)

    Journal of the Nigerian Association of Mathematical Physics: Contact. Journal Home > About the Journal > Journal of the Nigerian Association of Mathematical Physics: Contact. Log in or Register to get access to full text downloads.

  18. Nigerian Journal of Pharmaceutical Research: About this journal

    African Journals Online (AJOL)

    Nigerian Journal of Pharmaceutical Research: About this journal. Journal Home > Nigerian Journal of Pharmaceutical Research: About this journal. Log in or Register to get access to full text downloads.

  19. 48 The Nigerian Musical Instrument Production Industry Sunday ...

    African Journals Online (AJOL)

    Tracie1

    this research examines and assesses the various endeavours through which the Nigerian Musical Instrument Production ... Keywords: Nigerian, musical instruments, production, industry, economic, problems, development, prospect ... Thus, the need to validate such perception with national/state statistics that attest its.

  20. Journal of the Nigerian Association of Mathematical Physics: About ...

    African Journals Online (AJOL)

    Journal of the Nigerian Association of Mathematical Physics: About this journal. Journal Home > Journal of the Nigerian Association of Mathematical Physics: About this journal. Log in or Register to get access to full text downloads.

  1. Journal of the Nigerian Association of Mathematical Physics: Site Map

    African Journals Online (AJOL)

    Journal of the Nigerian Association of Mathematical Physics: Site Map. Journal Home > About the Journal > Journal of the Nigerian Association of Mathematical Physics: Site Map. Log in or Register to get access to full text downloads.

  2. Journal of the Nigerian Association of Mathematical Physics: Journal ...

    African Journals Online (AJOL)

    Journal of the Nigerian Association of Mathematical Physics: Journal Sponsorship. Journal Home > About the Journal > Journal of the Nigerian Association of Mathematical Physics: Journal Sponsorship. Log in or Register to get access to full text downloads.

  3. Archives: Journal of the Nigerian Association of Mathematical Physics

    African Journals Online (AJOL)

    Items 1 - 14 of 14 ... Archives: Journal of the Nigerian Association of Mathematical Physics. Journal Home > Archives: Journal of the Nigerian Association of Mathematical Physics. Log in or Register to get access to full text downloads.

  4. Alternative Fuels in Cement Production

    DEFF Research Database (Denmark)

    Larsen, Morten Boberg

    The substitution of alternative for fossil fuels in cement production has increased significantly in the last decade. Of these new alternative fuels, solid state fuels presently account for the largest part, and in particular, meat and bone meal, plastics and tyre derived fuels (TDF) accounted...... for the most significant alternative fuel energy contributors in the German cement industry. Solid alternative fuels are typically high in volatile content and they may differ significantly in physical and chemical properties compared to traditional solid fossil fuels. From the process point of view......, considering a modern kiln system for cement production, the use of alternative fuels mainly influences 1) kiln process stability (may accelerate build up of blockages preventing gas and/or solids flow), 2) cement clinker quality, 3) emissions, and 4) decreased production capacity. Kiln process stability...

  5. Calcium Aluminate Cement Hydration Model

    Directory of Open Access Journals (Sweden)

    Matusinović, T.

    2011-01-01

    Full Text Available Calcium aluminate cement (AC is a very versatile special cement used for specific applications. As the hydration of AC is highly temperature dependent, yielding structurally different hydration products that continuously alter material properties, a good knowledge of thermal properties at early stages of hydration is essential. The kinetics of AC hydration is a complex process and the use of single mechanisms models cannot describe the rate of hydration during the whole stage.This paper examines the influence of temperature (ϑ=5–20 °C and water-to-cement mass ratio (mH /mAC = 0.4; 0.5 and 1.0 on hydration of commercial iron-rich AC ISTRA 40 (producer: Istra Cement, Pula, Croatia, which is a part of CALUCEM group, Figs 1–3. The flow rate of heat generation of cement pastes as a result of the hydration reactions was measured with differential microcalorimeter. Chemically bonded water in the hydrated cement samples was determined by thermo-gravimetry.Far less heat is liberated when cement and water come in contact for the first time, Fig. 1, than in the case for portland cement (PC. Higher water-to-cement ratio increases the heat evolved at later ages (Fig. 3 due to higher quantity of water available for hydration. A significant effect of the water-to-cement ratio on the hydration rate and hydration degree showed the importance of water as being the limiting reactant that slows down the reaction early. A simplified stoichiometric model of early age AC hydration (eq. (8 based on reaction schemes of principal minerals, nominally CA, C12A7 and C4AF (Table 1, was employed. Hydration kinetics after the induction period (ϑ < 20 °C had been successfully described (Fig. 4 and Table 2 by a proposed model (eq. (23 which simultaneously comprised three main mechanisms: nucleation and growth, interaction at phase boundary, and mass transfer. In the proposed kinetic model the nucleation and growth is proportional to the amount of reacted minerals (eq

  6. Language Attitude and Nigerian Pidgin | Obi | AFRREV IJAH: An ...

    African Journals Online (AJOL)

    This study investigates the general attitudes of Nigerians from different social strata towards Nigerian Pidgin/Creole (NP). The subjects' attitudes to NP are elicited through library and ethnographic research. The findings of the study reveal that Nigerians have positive, negative and ambivalent attitudes towards NP. However ...

  7. A Discourse on the Creative Output of Contemporary Nigerian ...

    African Journals Online (AJOL)

    This paper focuses on the contemporary Nigerian musicians as creative artistes. It discusses such issues as the musicians, the medium of communication, musical output of Nigerian musicians and Nigerian music in the context of meeting global standards and other important concepts. It also gives a comprehensive list of ...

  8. Actualizing Effectual Citizens' Engagement in the Nigerian Electoral ...

    African Journals Online (AJOL)

    This study surveys opinion of Nigerians on the factors influencing low voters' participation or otherwise, in the Nigerian electoral process, it made use of data elicited from respondents' of the three Senatorial Districts of Edo State. The stratified random sampling technique was utilized to select a sample of 1,200 Nigerians, ...

  9. The electrocardiogram in healthy Nigerians resident in Lagos State ...

    African Journals Online (AJOL)

    The normal electrocardiograms of 520 healthy Nigerians age 15-49 years resident in Lagos were analysed. Normative values and frequency pattern of normal variants of the ECG of Caucasians and South African Bantu were compared to the Nigerian data. The results show significantly higher QRS voltages in Nigerians ...

  10. Cement pulmonary embolism after vertebroplasty.

    Science.gov (United States)

    Sifuentes Giraldo, Walter Alberto; Lamúa Riazuelo, José Ramón; Gallego Rivera, José Ignacio; Vázquez Díaz, Mónica

    2013-01-01

    In recent years, the use of vertebral cementing techniques for vertebroplasty and kyphoplasty has spread for the treatment of pain associated with osteoporotic vertebral compression fractures. This is also associated with the increased incidence of complications related with these procedures, the most frequent being originated by leakage of cementation material. Cement can escape into the vertebral venous system and reach the pulmonary circulation through the azygous system and cava vein, producing a cement embolism. This is a frequent complication, occurring in up to 26% of patients undergoing vertebroplasty but, since most patients have no clinical or hemodynamical repercussion, this event usually goes unnoticed. However, some serious, and even fatal cases, have been reported. We report the case of a 74-year-old male patient who underwent vertebroplasty for persistent pain associated with osteoporotic L3 vertebral fracture and who developed a cement leak into the cava vein and right pulmonary artery during the procedure. Although he developed a pulmonary cement embolism, the patient remained asymptomatic and did not present complications during follow-up. Copyright © 2012 Elsevier España, S.L. All rights reserved.

  11. Low pH Cements

    Energy Technology Data Exchange (ETDEWEB)

    Savage, David; Benbow, Steven [Quintessa Ltd., Henley-on-Thames (United Kingdom)

    2007-05-15

    The development of low-pH cements for use in geological repositories for radioactive waste stems from concerns over the potential for deleterious effects upon the host rock and other EBS materials (notably bentonite) under the hyperalkaline conditions (pH > 12) of cement pore fluids. Low pH cement (also known as low heat cement) was developed by the cement industry for use where large masses of cement (e.g. dams) could cause problems regarding heat generated during curing. In low pH cements, the amount of cement is reduced by substitution of materials such as fly ash, blast furnace slag, silica fume, and/or non-pozzolanic silica flour. SKB and Posiva have ruled out the use of blast furnace slag and fly-ash and are focusing on silica fume as a blending agent. Currently, no preferred composition has been identified by these agencies. SKB and Posiva have defined a pH limit {<=} 11 for cement grout leachates. To attain this pH, blending agents must comprise at least 50 wt % of dry materials. Because low pH cement has little, or no free portlandite, the cement consists predominantly of calcium silicate hydrate (CSH) gel with a Ca/Si ratio {<=} 0.8. Although there are potential implications for the performance of the spent fuel and cladding due to the presence of hyperalkaline fluids from cement, the principal focus for safety assessment lies with the behaviour of bentonite. There are a number of potential constraints on the interaction of hyperalkaline cement pore fluids with bentonite, including mass balance, thermodynamic issues, mass transport, and kinetics, but none of these is likely to be limiting if conventional OPC cements are employed in repository construction. Nevertheless: Low-pH cements may supply approximately 50 % less hydroxyl ions than conventional OPC for a given volume of cement, but mass balance constraints are complicated by the uncertainty concerning the type of secondary minerals produced during cement-bentonite interaction. The change of aqueous

  12. Shoulder pain syndrome among Nigerians.

    Science.gov (United States)

    Adelowo, O O; Oguntona, S; Ojo, O

    2009-04-01

    To identify aetiological causes of shoulder pain syndrome among patients attending a rheumatology clinic, and to highlight the therapeutic options. Retrospective study. A private rheumatology clinic in Lagos, Nigeria fromJanuary 2002 to December 2006. Forty female adult patients and 26 male adult patients aged 24-79 years. Patient reported outcome in terms of pain relief and increased mobility. Sixty six subjects were seen during the study period. Females were more commonly affected and were mostly middle aged. Adhesive capsulitis was the most common condition while septic arthritis and avascular necrosis were least diagnosed 22.7% of the subjects could not, however, be categorised. Shoulder pain syndrome is common among Nigerians. Diagnosis and management are mostly based on the clinical presentations, especially considering the lack of sensitivity of plain radiographs and the high cost of more sensitive MRI. The treatment of these conditions are standard.

  13. Leadership and the Nigerian Economy

    Directory of Open Access Journals (Sweden)

    Victor E. Dike

    2014-02-01

    Full Text Available The Nigerian economy is largely oil-based. Some people would rather say it is a mono-product economy. The economy has been in dire straits over the years, because of a combination of the neglect of education, especially technical and vocational education and science-based technology education, poor leadership and governance, corruption, as well as poor monetary and fiscal policies. All these have made a review of the poor investment in human capital development and infrastructure and institutions that drive the Nigerian economy and national development rather compelling. The political leaders have always raised the people’s hope by painting glowing pictures of their development plans and how they would stimulate the economy and improve the people’s living conditions. Thus, they swore that they would give priority attention to human capital development and national development, and empower the citizens, particularly the poorly educated, unskilled, and unemployed youths, with relevant human skills capital and entrepreneurial skills to enable them to contribute profoundly to national development. Yet the political leaders have, over the years, failed to adequately fund education and strengthen the infrastructure and institutions that would drive the economy and create employment for the teeming population. Both the new-breed politicians, like the old politicians before them, are promising to transform the nation into an industrialized society and the people cannot hold their expectations. The reality though is that Nigeria cannot become an industrialized society without investing abundantly in human capital development (education and health, leadership, and technological capabilities, which means investing in the future development of the nation.

  14. Nollywood, Popular Culture and Nigerian National Identity

    Directory of Open Access Journals (Sweden)

    Charles Effiong

    2017-09-01

    Full Text Available Film culture in Nigeria has become very popular among Nigerian and transnational audiences especially in Africa to the extent that there is hardly a day people do not look for new films produced by Nollywood. In the same light, there is hardly a street in the country where one cannot find at least a video shop that distributes these films. Young and old people especially those in the rural areas are often found hanging around these shops to catch a glimpse of any of the films advertised by retail outlets. This has therefore proven the popularity of Nollywood productions among the people, who see in these films issues of culture that engage their attention and also try to give them awareness about socio-cultural practices that are common in the society. A major problem of concern is that although these films expose and treat cultural issues that affect the society, their promotion of a true national identity is questionable. In this regard, this paper is an attempt to examine how the films produced by Nollywood have been able to promote national identity vis-à-vis showcasing the cultural values of the people that can be cherished in the Nigerian society and beyond. Arguments on this will be done through qualitative (interview method and supported by Kantian morality theory, which will help in concluding that as popular culture, Nigerian films have created among Nigerians and the world some cultural practices that tend to give the Nigerian people a negative identity.

  15. Degradable borate glass polyalkenoate cements.

    Science.gov (United States)

    Shen, L; Coughlan, A; Towler, M; Hall, M

    2014-04-01

    Glass polyalkenoate cements (GPCs) containing aluminum-free borate glasses having the general composition Ag2O-Na2O-CaO-SrO-ZnO-TiO2-B2O3 were evaluated in this work. An initial screening study of sixteen compositions was used to identify regions of glass formation and cement compositions with promising rheological properties. The results of the screening study were used to develop four model borate glass compositions for further study. A second round of rheological experiments was used to identify a preferred GPC formulation for each model glass composition. The model borate glasses containing higher levels of TiO2 (7.5 mol %) tended to have longer working times and shorter setting times. Dissolution behavior of the four model GPC formulations was evaluated by measuring ion release profiles as a function of time. All four GPC formulations showed evidence of incongruent dissolution behavior when considering the relative release profiles of sodium and boron, although the exact dissolution profile of the glass was presumably obscured by the polymeric cement matrix. Compression testing was undertaken to evaluate cement strength over time during immersion in water. The cements containing the borate glass with 7.5 mol % TiO2 had the highest initial compressive strength, ranging between 20 and 30 MPa. No beneficial aging effect was observed-instead, the strength of all four model GPC formulations was found to degrade with time.

  16. Heterogeneous Glasses and Sustainable Cement

    Science.gov (United States)

    Del Gado, Emanuela

    2015-03-01

    Calcium-silicate hydrate (C-S-H) is the main binding agent in cement and concrete. It forms at the beginning of cement hydration, it progressively densifies as cement hardens and is ultimately responsible for the performances of concrete. This hydration product is a cohesive nano-scale heterogeneous glass, whose structure and mechanics are still poorly understood, in spite of its practical importance. I will review some of the open questions for this fascinating material and discuss a statistical physics approach recently developed, which allows us to investigate the structural arrest and solidification under the out-of-equilibrium conditions typical of cement hydration and the role of the nano-scale structure in C-S-H mechanics upon hardening. Our approach unveils how some distinctive features of the kinetics of cement hydration can be related to changes in the morphology of this glassy material and elucidates the role of nano-scale mechanical heterogeneities in the hardened C-S-H.

  17. Seating load parameters impact on dental ceramic reinforcement conferred by cementation with resin-cements.

    LENUS (Irish Health Repository)

    Addison, Owen

    2010-09-01

    Cementation of all-ceramic restorations with resin-cements has been demonstrated to reduce the incidence of fracture in service. The aim was to investigate the influence of loading force and loading duration applied during cementation on the reinforcement conferred by a resin-cement on a leucite reinforced glass-ceramic.

  18. Nigerian

    African Journals Online (AJOL)

    JONATHAN

    The political theories in the medieval periods were not exceptions. There was the ... differentiated and autonomous organizations successfully claiming priority in the ...... groups, especially practitioners of Islam and Christianity. 102 .... 4 Azelama, J., An Introduction to Political Science, Benin City: MACADAMS. Publishers ...

  19. Nigerian

    African Journals Online (AJOL)

    JONATHAN

    In the Medieval political theory, there were two types of society, the church and the state. 2 .... personalities assume roles in society without undue strain. When ..... meaning is that there is no cause and effect relationship between the state and ...

  20. Nigerian

    African Journals Online (AJOL)

    USER

    2016-11-08

    Nov 8, 2016 ... water scarcity; pollution and emissions; traffic congestion; crime; waste disposal; and safety risks from ageing infrastructure. As a concept, Integrated Solid Waste. Management ..... Engineering Geology, 73(1-2): 171-. 177. Mshelia, A.D. (2015). Solid waste management: An urban environmental sanitation ...

  1. Bioactive and Hemocompatible Calcium Sulphoaluminate Cement

    OpenAIRE

    Acuña-Gutiérrez, Iván Omar; Escobedo-Bocardo, José Concepción; Almanza-Robles, José Manuel; Cortés-Hernández, Dora Alicia; Saldívar-Ramírez, Mirna María Guadalupe; Reséndiz-Hernández, Perla Janet; Zugasti-Cruz, Alejandro

    2015-01-01

    Calcium sulphoaluminate cement (CSAC) is an attractive candidate for biomedical applications due to its appropriate mechanical properties and high calcium content. In vitro bioactivity and hemocompatibility of calcium sulphoaluminate cement were assessed. The cement was prepared from a mixture of calcium sulphoaluminate (CSA) clinker, gypsum and water. Cement samples were immersed in a simulated body fluid (SBF) at 37 °C for different periods of time (7, 14 and 21 days). The analyses of these...

  2. 76 FR 24519 - Gray Portland Cement and Cement Clinker From Japan; Institution of a Five-Year Review Concerning...

    Science.gov (United States)

    2011-05-02

    ... COMMISSION Gray Portland Cement and Cement Clinker From Japan; Institution of a Five-Year Review Concerning the Antidumping Duty Order on Gray Portland Cement and Cement Clinker From Japan AGENCY: United States... determine whether revocation of the antidumping duty order on gray portland cement and cement clinker from...

  3. 76 FR 50252 - Gray Portland Cement and Cement Clinker From Japan; Scheduling of an Expedited Five-Year Review...

    Science.gov (United States)

    2011-08-12

    ... COMMISSION Gray Portland Cement and Cement Clinker From Japan; Scheduling of an Expedited Five-Year Review Concerning the Antidumping Duty Order on Gray Portland Cement and Cement Clinker From Japan AGENCY: United... cement and cement clinker from Japan would be likely to lead to continuation or recurrence of material...

  4. ADVANCED CEMENTS FOR GEOTHERMAL WELLS

    Energy Technology Data Exchange (ETDEWEB)

    SUGAMA,T.

    2007-01-01

    Using the conventional well cements consisting of the calcium silicate hydrates (CaO-SiO{sub 2}-H{sub 2}O system) and calcium aluminum silicate hydrates (CaO-Al{sub 2}O{sub 3}-SiO{sub 2}-H{sub 2}O system) for the integrity of geothermal wells, the serious concern confronting the cementing industries was their poor performance in mechanically supporting the metallic well casing pipes and in mitigating the pipe's corrosion in very harsh geothermal reservoirs. These difficulties are particularly acute in two geological regions: One is the deep hot downhole area ({approx} 1700 m depth at temperatures of {approx} 320 C) that contains hyper saline water with high concentrations of CO{sub 2} (> 40,000 ppm) in conjunction with {approx} 100 ppm H{sub 2}S at a mild acid of pH {approx} 5.0; the other is the upper well region between the well's surface and {approx} 1000 m depth at temperatures up to 200 C. The specific environment of the latter region is characterized by highly concentrated H{sub 2}SO{sub 4} (pH < 1.5) brine containing at least 5000 ppm CO{sub 2}. When these conventional cements are emplaced in these harsh environments, their major shortcoming is their susceptibility to reactions with hot CO{sub 2} and H{sub 2}SO4, thereby causing their deterioration brought about by CO{sub 2}-catalyzed carbonation and acid-initiated erosion. Such degradation not only reduced rapidly the strength of cements, lowering the mechanical support of casing pipes, but also increased the extent of permeability of the brine through the cement layer, promoting the rate of the pipe's corrosion. Severely carbonated and acid eroded cements often impaired the integrity of a well in less than one year; in the worst cases, casings have collapsed within three months, leading to the need for costly and time-consuming repairs or redrilling operations. These were the reasons why the geothermal well drilling and cementing industries were concerned about using conventional well

  5. Shear bond strength of cement to zirconia

    NARCIS (Netherlands)

    Rosentritt, M.; Behr, M.; van der Zel, J.M.; Feilzer, A.J.

    2009-01-01

    This study investigated the shear bond strength (SBS) of various cements to zirconia ceramic. CoCr-cylinders were bonded to zirconia plates (20 mm × 10 mm × 2 mm; n = 8 per group) using four self-adhesive resin cements (one capsule, three hand-mixed) and four resin cements, partly in combination

  6. 21 CFR 872.3275 - Dental cement.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental cement. 872.3275 Section 872.3275 Food and... DENTAL DEVICES Prosthetic Devices § 872.3275 Dental cement. (a) Zinc oxide-eugenol—(1) Identification... filling or as a base cement to affix a temporary tooth filling, to affix dental devices such as crowns or...

  7. Multicomponent modelling of Portland cement hydration reactions

    NARCIS (Netherlands)

    Ukrainczyk, N.; Koenders, E.A.B.; Van Breugel, K.

    2012-01-01

    The prospect of cement and concrete technologies depends on more in depth understanding of cement hydration reactions. Hydration reaction models simulate the development of the microstructures that can finally be used to estimate the cement based material properties that influence performance and

  8. Burning sewage sludge in cement kilns

    Energy Technology Data Exchange (ETDEWEB)

    Obrist, A.

    1987-03-01

    Full-scale industrial trial burning of sewage sludge in cement kilns in Switzerland is reported. Tests with dried sludge, kiln operation, chimney emissions, clinker and cement are discussed, and possibilities open to Swiss cement industry, and significance within the overall scope of waste disposal are outlined.

  9. Rice Husk Ash Cement – An alternative pozzolana cement for ...

    African Journals Online (AJOL)

    The engineering properties of the cement resulting from a mixture of OPC plus RHA and lime plus RHA were satisfactory with addition of up to 50% RHA. The RHA improved greatly the compressive strength of lime. The cost of producing RHA was considered in pricing the resulting binder and it showed that the use of RHA ...

  10. Development of novel dental cements. II. Cement properties.

    Science.gov (United States)

    Neve, A D; Piddock, V; Combe, E C

    1992-01-01

    Following earlier work, three novel aluminoborate glasses have been studied as potential cement components. Factors studied include the effect of batch size on composition and manipulative characteristics, and the effect of tartaric acid and conditions of storage on mechanical properties. It was concluded that two materials have potential for application as dental luting agents.

  11. Fast Setting Cement - Literature Survey

    Science.gov (United States)

    1973-01-01

    viscosity, and adaptability to fillers . This formula- tion provides a 30-mmn compressive strength of 3500 psi and flexural strength of 600 psi. Among other... limestone sand, water, and plastiment showed a compressive strength of approximately 6700 psi at 1 day. 5. Annex C - Very fine cements. a. The

  12. False set in aireated cements

    Directory of Open Access Journals (Sweden)

    Vázquez, T.

    1986-06-01

    Full Text Available The influence of aireation on the appearance or elimination of the false setting in industrial portland cements is studied by means of infrared spectroscopy.

    Se estudia por medio de la espectroscopia infrarroja la influencia de la aireación sobre la aparición o eliminación del fraguado, en cemento portland industriales.

  13. Understanding cement mechanical behavior in SAGD wells

    Energy Technology Data Exchange (ETDEWEB)

    Xie, J.; Zahacy, T. A. [C-FER Technologies (Canada)

    2011-07-01

    In the heavy oil industry, the steam assisted gravity drainage process is often used to enhance oil recovery but it can cause cracks in the cement sheath. These cracks are the result of high steam temperatures and thermal expansion. In order to mitigate this risk, improved well designs are required. The aim of this paper is to present the mechanical behavior of the cement sheath during the heating phase. An analysis of the impact of design and operating parameters was conducted through thermal hydraulic and thermal mechanical analyses to assess cement integrity. These analyses were then performed on an example of an SAGD project in the southern part of the Athabasca oilsands region to assess the performance of the cement sheath. Results showed that potential damage to the cement can be reduced by slow heating and a lower Young's modulus cement blend. This paper makes recommendations for optimizing cement design in thermal recovery wells.

  14. Nano-granular texture of cement hydrates

    Directory of Open Access Journals (Sweden)

    Ioannidou Katerina

    2017-01-01

    Full Text Available Mechanical behavior of concrete crucially depends on cement hydrates, the “glue” of cement. The design of high performance and more environmentally friendly cements demands a deeper understanding of the formation of the multiscale structure of cement hydrates, when they precipitate and densify. We investigate the precipitation and setting of nano-grains of cement hydrates using a combination of Monte Carlo and Molecular Dynamics numerical simulations and study their texture from nano up to the micron scale. We characterize the texture of cement hydrates using the local volume fraction distribution, the pore size distribution, the scattering intensity and the chord length distribution and we compare them with experiments. Our nano-granular model provides cement structure with realistic texture and mechanics and can be further used to investigate degradation mechanisms.

  15. Building Savings and Investments Culture among Nigerians

    African Journals Online (AJOL)

    DR Nneka

    If this persists, the Nigeria populace will be engulfed in poverty trap. It is therefore necessary to build among Nigerians savings and investments culture. A review of ... On the other hand, investment is the commitment of capital to the purchase of ... of making money available for future purchases with the expectation that.

  16. KALA-AZAR IN A NIGERIAN:

    African Journals Online (AJOL)

    A case of visceral leishmaniasis (KaIa-azar) in a 60-year~old Nigerian female is presented. The clinical findings were fever, weight loss, lympadenopathy, hepatomegaly, and self-healing cutaneous ulcers. Laboratory findings included severe anaemia, lymphocytosis and amastigotes in the blood smear. The patient died ...

  17. Globalization, Imperialism and Christianity: The Nigerian ...

    African Journals Online (AJOL)

    FIRST LADY

    The new brand of economy that came with imperialism spread hunger and diseases. Christianity and Islam staked their hold on Nigerian culture and tradition stifling the traditional elements ... identity crisis and cultural alienation for the developing nations. Bamgbose .... celebrations and in liturgical books and hymns. Today ...

  18. Primigravida at Advanced Maternal Age | Adefuye | Nigerian ...

    African Journals Online (AJOL)

    A definitive increase in the number of women in this group is expected to occur both in developed and developing countries thus necessitating an in-depth review and updating of knowledge in the management of this category of women. Keywords: Primigravida, Advanced Maternal Age, Obstetric Outcome Nigerian Medical ...

  19. Framework for Entrepreneurship Education in Nigerian Higher ...

    African Journals Online (AJOL)

    It seems fair to argue that opinions from Nigeria's government and its policy makers, and the management of various Nigerian higher institutions of learning concerning the mandatory introduction of entrepreneurship education in all disciplines so far have lacked a common framework. This lack of framework is responsible ...

  20. TOWN AND GOWN INTERFACE: ASSESSMENT OF NIGERIAN ...

    African Journals Online (AJOL)

    Prof

    the employment of natives in Nigerian federal universities located on their land. The concept of town and gown was situated in its historical context. Host communities of the University of Jos (UNIJOS) and the. Federal University of .... The Igbo are well educated, enterprising (Afigbo, 1982) and cherish white collar jobs ...

  1. Perception of Nigerian healthcare professionals about substance ...

    African Journals Online (AJOL)

    Perception of Nigerian healthcare professionals about substance abuse and their willingness to seek substance related help: a pilot study. ... Moreover, there was lower readiness to seek and pay for treatment among them. Conclusion: The study has brought to the fore the need to provide mental health education especially ...

  2. Managing examination malpractice in Nigerian University system ...

    African Journals Online (AJOL)

    The phenomenon which has both moral and legal dimensions is considered as a hydra-headed problem that has pervaded the entire educational system in Nigeria. One of its resultant effects is a gradual loss of confidence in the products of educational system and gradual de-recognition of certificates issued by Nigerian ...

  3. Nigerian dental technology students and human immunodeficiency ...

    African Journals Online (AJOL)

    Background: The rehabilitative dental care is important for maintaining adequate nutrition, guarding against wasting syndrome and malnutrition among human immunodeficiency virus (HIV)‑infected individuals. Aim: The aim of this study is to determine the Nigerian dental technology students' knowledge and ...

  4. Congruent Transformation | Henry | Journal of the Nigerian ...

    African Journals Online (AJOL)

    Journal of the Nigerian Association of Mathematical Physics. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 20, No 1 (2012) >. Log in or Register to get access to full text downloads.

  5. PATTERN OF BLOOD PRESSURE IN URBAN NIGERIAN ...

    African Journals Online (AJOL)

    The pattern of blood pressure in a cross-section of urban apparently healthy Nigerian adolescents aged 13 to 18 years as well as the prevalence of elevated blood pressure (hypertension) in the group is presented. Four hundred and forty three (443) students attending two secondary schools in the city of Calabar formed ...

  6. PSYCHIATRIC MORBIDITY IN A NIGERIAN NEUROLOGY CLINIC

    African Journals Online (AJOL)

    2013-05-28

    May 28, 2013 ... East African Medical Journal Vol. 89 No. 2 February 2012. PSYCHIATRIC MORBIDITY IN A NIGERIAN NEUROLOGY CLINIC. P. O. Ajiboye, FWACP, Senior Lecturer/ Consultant Psychiatrist, Department of Behavioural Sciences, University of Ilorin/. University of Ilorin Teaching Hospital, Ilorin, Kwara State, ...

  7. Controlling Hypertension in Diabetic Patients | Familoni | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Endocrine Practice ... of interventional studies should be systolic 130 – 135 mm Hg and diastolic BP not below 70mm Hg. There are increased risks when systolic BP is higher than 140 mm Hg. Combination therapy which should include initially an RAAS (Renin Angiotensin Aldosterone System) blocker is required.

  8. Nigerian Journal of Clinical Medicine: Submissions

    African Journals Online (AJOL)

    Consequently, NJCM, its Editorial Board and LASUTH-ARD bear no legal responsibility for such opinions. Authors are encouraged to send their manuscripts to the LASUTH-ARD Secretariat addressed to: The Editor, Nigerian Journal of Clinical Medicine (NJCM). An electronic copy of the manuscript in Microsoft Word format ...

  9. Corneal Intelligence | Murdoch | Nigerian Journal of Ophthalmology

    African Journals Online (AJOL)

    Nigerian Journal of Ophthalmology. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 19, No 1 (2011) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Corneal Intelligence. I Murdoch. Abstract. No Abstract. Full Text:.

  10. Nigerian Journal of Clinical and Counselling Psychology

    African Journals Online (AJOL)

    ... centres for participants with previous admission records. Drug therapy, psychotherapy and occupational therapy were the management strategies used and a recommendation for the inclusion of peer counselling as a management strategy. (Nigerian Journal of Clinical and Counselling Psychology: 2001 7 (1&2): 17-34) ...

  11. Nigerian Poetry since 1990: History, Disillusionment and ...

    African Journals Online (AJOL)

    independence disillusionment, the poetry of the 1970s reflected on the Nigerian civil war, while the 1980s produced poetry with ideological orientation. The 1990s was the decade that saw the maturation of emergent poets who were born in the ...

  12. PROSPECTS AND PROBLEMS OF NIGERIAN WOMEN IN ...

    African Journals Online (AJOL)

    Science and technology are human activities that have had profound influence on creation of wealth and sustainable development, but are the areas that have been re- cording the lowest women participation worldwide. It is a necessity that Nigerian women should be part and parcel of her science and technology ...

  13. RELEVANCE OF CORPORATE GOVERNANCE IN NIGERIAN ...

    African Journals Online (AJOL)

    Although corporate governance is of general interests to the Nigerian public, that of the banking industry is of ... accounting and financial reporting framework in Nigeria. Furthermore, Okike (1999) .... (h) It is the ultimate decision taker although from all practical purposes, much of the authority is delegated to senior and ...

  14. Nigerian Journal of Physiological Sciences: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. Nigerian Journal of Physiological Sciences (Niger. J. Physiol. Sci.) is a biannual publication of the Physiological Society of Nigeria. It covers diverse areas of research in physiological sciences, publishing reviews in current research areas and original laboratory and clinical research in physiological ...

  15. Labour market expectation of Nigerian computer science ...

    African Journals Online (AJOL)

    The objective of the study is to assess the effect of Nigerian Universities' curricula on the performance of Computer Science graduates. This paper looks into the strength and weaknesses of Computer Science graduates in Nigeria with a view to assess if they meet the labour market expectation. It also x-rays the women ...

  16. Journal of the Nigerian Optometric Association

    African Journals Online (AJOL)

    This international, peer-reviewed journal is an official publication of the Nigerian Optometric Association (NOA). It is devoted to bring together, for its specialised audience, up-to-date clinical and scientific research information and novel developments in the broad fields of Optometry and Health Sciences, providing a medium ...

  17. Nigerian Journal of Orthopaedics and Trauma: Submissions

    African Journals Online (AJOL)

    The Nigerian Journal of Orthopaedics and Trauma is a peer reviewed journal publishing original research articles on all aspects of trauma, musculoskeletal diseases / disorders and related clinical and basic science fields. Manuscripts are submitted on the understanding that they have not been previously published and ...

  18. Nigerian Journal of Clinical Practice: Submissions

    African Journals Online (AJOL)

    Author Guidelines. Mission Statement The purpose of the Nigerian Journal of Clinical Practice is to promote clinical and academic excellence in Medicine and Dentistry and allied sciences. To this end the Journal will publish its issues regularly and will ensure their prompt distribution to all subscribers and libraries ...

  19. Management of Odontogenic Fibromyxoma in Pediatric Nigerian ...

    African Journals Online (AJOL)

    These may include dental papilla, dental follicle or periodontal. Management of Odontogenic Fibromyxoma in. Pediatric Nigerian Patients: A Review of 8 Cases. Omeje KU, Amole IO, Osunde OD1, Efunkoya AA. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Bayero University, Aminu Kano Teaching ...

  20. Nigerian Journal of Guidance and Counselling

    African Journals Online (AJOL)

    The Nigerian Journal of Guidance and Counselling (TNJGC) (ISSN 0794-0831) is published annually by the Department of Counsellor Education, University of Ilorin, Ilorin, Nigeria. The journal publishes well researched and well articulated papers/articles on all issues relating to counselling and applied psychology which ...

  1. Nigerian Journal of Orthopaedics and Trauma

    African Journals Online (AJOL)

    The Nigerian Journal of Orthopaedics and Trauma publishes original papers, review articles and case reports on pathology, anaesthesia, orthopaedics and trauma. Vol 12, No 1 (2013). DOWNLOAD FULL TEXT Open Access DOWNLOAD FULL TEXT Subscription or Fee Access. Table of Contents. Articles. Management of ...

  2. Nigerian Journal of Clinical and Counselling Psychology

    African Journals Online (AJOL)

    The Nigerian Journal of Clinical and Counselling Psychology is concerned with the psychological, social, behavioural, medical, paediatric and ethical aspects of the applied field of clinical and counselling psychology. The journal publishes contributions of research, clinical, counselling and theoretical interest. Contributions ...

  3. Journal of the Nigerian Infection Control Association

    African Journals Online (AJOL)

    The Journal of the Nigerian Infection Control Association publishes articles which deal with clinical medicine, basic medical science, dental sciences, pharmaceutical, veterinary sciences, nursing services and medical education and other related disciplines which are pertinent to infection control. Language of Publication: ...

  4. Pulmonary Performance In Asymptomatic Young Nigerian ...

    African Journals Online (AJOL)

    Pulmonary Performance In Asymptomatic Young Nigerian Population Following The Administration Of Ascorbic Acid And Salbutamol. ... Ascorbic acid was given orally at a dose of 1.50 mg /kg body weight; and salbutamol at a dose of 70 μg/kg body weight, orally. Measurements ... http://dx.doi.org/10.4314/njps.v19i1.32635.

  5. Model Predictive Control Fundamentals | Orukpe | Nigerian Journal ...

    African Journals Online (AJOL)

    Nigerian Journal of Technology. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 31, No 2 (2012) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if your ...

  6. Human Resources Development Programmes in Nigerian Academic ...

    African Journals Online (AJOL)

    Human Resources Development Programmes in Nigerian Academic Libraries: A Comparative Study of Universities in Imo State. ... In Imo State University, librarians and para-professionals sponsored themselves for training and development programmes while in FUTO they were sponsored by the university management.

  7. IMAGES OF POWER IN CONTEMPORARY NIGERIAN PAINTINGS ...

    African Journals Online (AJOL)

    DR. OKECHUKWU NWAFOR

    Contemporary Nigerian paintings are replete with images and notions of power and power relations among ... Image is most times linked to power of psychological construction, of thought using imaginative power to create an idea of a thought with figuring of human or a thing. .... such a painting a lot of reading can go into it.

  8. Nigerian Veterinary Journal Vol. 26 (2), 2005

    African Journals Online (AJOL)

    The Morocco leather from Sokoto red goat has been A total of 200 samples of the gall bladder rated to be of high grade and has of both adult sheep (100) and goats (100) contributed to the Nigerian foreign were collected .following slaughter at the exchange over the years (Rim Report, Zaria abattoir over a period of three '.

  9. Folksongs in indigenous trade advertisement | Efurhevwe | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Music Review. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 9-10 No 1, 2008-2009 >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. DOWNLOAD FULL TEXT Open Access DOWNLOAD FULL TEXT ...

  10. (Ict) In The Nigerian Teacher Education Programme

    African Journals Online (AJOL)

    seeks to assess the present status of ICT in our teacher education programmes and the extent to which Nigerian teacher educators use technology in preparing the preservice teacher for the world of work in a fast growing technological age. Keywords: Information Communication Technology, Teacher Education Programme

  11. Nigerian Journal of General Practice: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Journal of General Practice is the official publication of the Association of General and Private Medical Practitioners of Nigeria. It is a multi-disciplinary, biannual, peer-reviewed biomedical journal that has been published since 1985. It invites scholarly manuscripts relevant to the broad ...

  12. Workplace Absenteeism in the Nigerian Telecommunication Sector ...

    African Journals Online (AJOL)

    In spite of the prevalence of workplace absenteeism within the Nigerian industry, the quantification of the impact that it has on productivity has not been ascertained. Though, appreciable number of studies has been committed to understand why employees excuse themselves from duties, however, these studies have been ...

  13. Marriage Counselling in Multicultural Society, Nigerian Experience ...

    African Journals Online (AJOL)

    This paper discusses marriage counselling in Multicultural society: Nigerian experience. The researcher sees Multicultural Counselling as a helping relationship, which involves two or more persons with different culture, beliefs and environment. The paper discusses how multicultural counselling can be applied in marriage ...

  14. Knowledge And Attitude Of Nigerian Ophthalmologists Towards ...

    African Journals Online (AJOL)

    The aim of this study was to determine the attitude of practicing Nigerian ophthalmologists towards cornea donation and corneal graft. The responses of 160 ophthalmologists (specialists and senior registrars) in Nigeria who responded to an appropriate questionnaire on cornea donation at one of their National conferences ...

  15. Periodontal Disease Awareness and Knowledge among Nigerian ...

    African Journals Online (AJOL)

    irrespective of age, gender, race, and place of residence to a variable extent and severity. It is known to be the more. Periodontal Disease Awareness and Knowledge among Nigerian Primary School Teachers. Azodo CC, Umoh AO. Department of Periodontics, University of Benin, Benin City, Edo State, Nigeria. Abstract.

  16. 167 CURBING PROMISCUOUS HABITS AMONG NIGERIANS ...

    African Journals Online (AJOL)

    satellite television stations operating in the country, real sex programmes beamed uncontrolled and unedited from satellite televisions into many Nigerian homes. Foreign and local pornographic ..... new materialism, inequity and social injustice, dropout from educational institutions, looseness and carelessness of parent ...

  17. Nigerian Journal of Nutritional Sciences: Contact

    African Journals Online (AJOL)

    Principal Contact. Dr. Folake Samuel Editor-in-Chief, Nigerian Journal of Nutritional Sciences Department of Human Nutrition Faculty of Public Health University of Ibadan Nigeria njns2013@gmail.com. Editor-in-Chief - NJNS. Department of Human Nutrition. Faculty of Public Health. University of Ibadan. Nigeria.

  18. Wernicke's Encephalopathy in a Nigerian with Schizophrenia ...

    African Journals Online (AJOL)

    While Wernicke's encephalopathy (WE) is a well-characterized syndrome in alcoholism and malnutrition, little is written of its prevalence or presentation in patients with psychiatric illness. We present a case of a 37-year-old Nigerian male with schizophrenia and malnutrition who presented with delirium and ophthalmoplegia ...

  19. Malaria resistance | Iyabo | Nigerian Medical Practitioner

    African Journals Online (AJOL)

    Age and puberty have been found to contribute to malaria resistance. It is expected that knowledge of natural resistance to malaria may aid in developing Vaccines against this deadly disease. Keywords: malaria resistance, puberty, malaria economy, malaria vaccine. Nigerian Medical Practitioner Vol. 49(5) 2006: 133-142 ...

  20. pulmonary performance in asymptomatic young nigerian population

    African Journals Online (AJOL)

    Bioline

    1. PULMONARY PERFORMANCE IN ASYMPTOMATIC YOUNG NIGERIAN. POPULATION FOLLOWING THE ADMINISTRATION OF ASCORBIC. ACID AND SALBUTAMOL. S. O. ODEH1, I. E. AGABA2, A. M. SABO 1, and R. A. ODANAOGUN 1. 1 Department of Human Physiology, 2 Department of Medicine and Radiology,.

  1. Nigerian Journal of Health and Biomedical Sciences

    African Journals Online (AJOL)

    The Nigerian Journal of Health and Biomedical Sciences is a multidisciplinary and peer-reviewed journal. This journal was established to meet the challenges of health care delivery in the 21st century in Nigeria and other countries with similar setting in the ever-changing world of science and technology. The health care ...

  2. Nigerian Quarterly Journal of Hospital Medicine

    African Journals Online (AJOL)

    Nigerian Quarterly Journal of Hospital Medicine is published quarterly and the contents include articles in Medicine, Dentistry, Pharmaceutical and Basic Medical Sciences with emphasis on health problems and solutions relating to developing countries. The readership are in - Libraries, Teaching Hospitals, Universities, ...

  3. Nigerian Journal of Physics: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. Nigerian Journal of Physics publishes original papers in pure and applied physics. It aims to serve research physicists in the academia, industry as well as graduate students. Section Policies. Articles. Checked Open Submissions, Checked Indexed, Checked Peer Reviewed. Publication Frequency.

  4. Geological mapping using fractal technique | Lawal | Nigerian ...

    African Journals Online (AJOL)

    ... in Nigeria) showed good correlation with the geological maps of the areas. The results also indicated that basement rocks can generally be represented by scaling exponents with values ranging between -3.0 and -2.0. Keywords: Fractal, dimension, susceptibility, spectra, scaling exponent. Nigerian Journal of Physics Vol.

  5. Examination malpractices in Nigerian educational system: Causes ...

    African Journals Online (AJOL)

    ... enveloped the entire educational system. This paper, examines this issue from the perspective of its causes and effects on students, parents, governments, nation and the educational system. Suggestions towards combating the social menace are also discussed. Nigerian Journal of Clinical and Counselling Psychology ...

  6. Nigerian Journal of Technological Development: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Journal of Technological Development is now a quarterly publication of the Faculty of Engineering & Technology, University of Ilorin, Ilorin, Nigeria. It publishes original high-quality articles focusing on all aspects of Engineering and Applied Sciences in March, June, September and ...

  7. POSTULATIONS AND THEORIES OF NIGERIAN MAKEUP ...

    African Journals Online (AJOL)

    According to Enekwe (12): ….Gelede ceremony, which is designed to sublimate the dangerous power of Aje, women on whom. Onile, the Earth mother, has bestowed mystic powers that can be used destructively, such as in. 131. 132. Emmanuel Dike E. Nwachukwu. Postulations and Theories of Nigerian Make-up Designs ...

  8. The histopathology report | Komolafe | Nigerian Journal of ...

    African Journals Online (AJOL)

    Nigerian Journal of Postgraduate Medicine. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 2, No 1 (2009) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. DOWNLOAD FULL TEXT Open Access DOWNLOAD FULL TEXT ...

  9. Giant mucinous cystadenoma: Case report | Nwobodo | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Practice. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 13, No 2 (2010) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Giant mucinous cystadenoma: Case report.

  10. Electrocardiographic And Echocardiographic Findings Of Nigerian ...

    African Journals Online (AJOL)

    Summary In a prospective study spanning over 6 months involving one hundred and nineteen male and female subjects comprising 98 Nigerian athletes and 55 age and sex matched controls all had electrocardiography and echocardiographic assessment of left ventricular dimensions and systolic function. Athletes were ...

  11. Electrocardiographic And Echocardiographic Findings Of Nigerian ...

    African Journals Online (AJOL)

    ... functions of both categories of athletes were found to be within normal limits and better than the control group. None of the athlete had echocardiographic features suggestive of hypertrophic cardiomyopathy. Key words: Electrocardiography, Echocardiograph in athletes and non athletes. Nigerian Medical Practitioner Vol.

  12. Yellow nail syndrome and bronchiectasis | Adegboye | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Surgical Research. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 4, No 3 (2002) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  13. Nigerian Journal of Psychiatry: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Journal of Psychiatry publishes original scientific papers, review articles, short reports and opinion papers in all areas of psychiatry and related fields such as sociology, applied anthropology and neurosciences. Section Policies. Articles. Checked Open Submissions, Checked Indexed ...

  14. Management of Odontogenic Fibromyxoma in Pediatric Nigerian ...

    African Journals Online (AJOL)

    Aim; This paper is a review of management of 8 pediatric patients with histologically diagnosed OFM at a Nigerian tertiary health care facility. This was a retrospective study of all patients aged 15 years and below who presented to the Oral and Maxillofacial Surgery Clinic of Aminu Kano Teaching Hospital, Kano, over a ...

  15. Revamping Nigerian Economy through Cassava Production

    African Journals Online (AJOL)

    Nneka Umera-Okeke

    The main kernel of this paper is on revamping Nigerian economy through .... products, such as starch, etc. are exported to advanced countries e.g. China, Germany, etc. ... allied industries shall engage in the actions of social responsibilities towards its host ... Also, the farmers will be assured of readily market for cassava.

  16. Cancer Prevention Strategies | Mandong | Nigerian Journal of ...

    African Journals Online (AJOL)

    Nigerian Journal of Medicine. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 20, No 4 (2011) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. DOWNLOAD FULL TEXT Open Access DOWNLOAD FULL ...

  17. Nigerian Journal of Surgical Research: Submissions

    African Journals Online (AJOL)

    Acute pancreatitis at Jos University Teaching Hospital. Nigerian Journal of Surgery 1997; 4:58-62. • For Chapter in a book: Ajayi OOA, The breast. In: Badoe EA, Archampong EQ, Jaja MOA (eds). Principles and Practice of Surgery, including Pathology in the Tropics. Ghana Publishing Corporation, Tema, 1986; 415-438.

  18. Nigerian Medical Students: An Underappreciated And Underutilized ...

    African Journals Online (AJOL)

    Nigerian Medical Students: An Underappreciated And Underutilized Research Resource. ... Open Access DOWNLOAD FULL TEXT ... Nevertheless, regardless of whether research is a required or voluntary activity, at most U.S. medical schools at least one-third and as many as one hundred percent of the student body ...

  19. Nigerian physicians' knowledge, attitude and practices regarding ...

    African Journals Online (AJOL)

    Background: Despite the increasing prevalence of diabetes in the paediatric age group, information concerning Nigerian physicians' knowledge, attitude and practices with regard to diabetes care in children and adolescents is scarce. Objective: To assess the knowledge, attitude and practices of physicians working in ...

  20. Datura stramonium poisoning in children | Adegoke | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Practice. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 16, No 1 (2013) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if ...

  1. GLOBAL ECONOMIC MELTDOWN AND THE NIGERIAN ...

    African Journals Online (AJOL)

    economy. Through a historical excursion, it shows how the causes of the. Great Depression and the current crisis are related. It situates the meltdown in the way ... For the first time in recent years, the Nigerian economy, all through the last quarter of 2008 ..... we are not deeply hooked in the global digital economy. It is fool ...

  2. Nigerian foodstuffs with prostate cancer chemopreventive polyphenols

    OpenAIRE

    Atawodi, Sunday Eneojo

    2011-01-01

    Dietary polyphenols are antioxidants that can scavenge biological free radicals, and chemoprevent diseases with biological oxidation as their main etiological factor. In this paper, we review our laboratory data vis-?-vis available literature on prostate cancer chemopreventive substances in Nigerian foodstuffs. Dacryodes edulis fruit, Moringa oleifera and Syzygium aromaticum contained prostate active polyphenols like ellagic acid, gallate, methylgallate, catechol, kaempferol quercetin and the...

  3. Cardiovascular responses to treadmill exercise in Nigerian ...

    African Journals Online (AJOL)

    Background: Left ventricular hypertrophy (LVH) is an independent risk factor for adverse cardiac outcomes in hypertensive patients. Objective: This study is designed to assess the cardiovascular responses to treadmill exercise among Nigerian hypertensives with echocardiographically proven LVH. Materials and Methods: ...

  4. Job satisfaction amongst Nigerian ophthalmologists: an exploratory ...

    African Journals Online (AJOL)

    2010-01-08

    Jan 8, 2010 ... Job satisfaction amongst medical practitioners in a Nigerian Community. Nig Hosp Pract. 2008; 2: 80Б4. 21. Lloyd S, Streiner D, Shannon S. Burn out, depression, life and job satisfaction among Canadian emergency physicians. J Emerg Med. 1994; 12: 559Б65. 22. Bell DJ, Bringman J, Bush A, Phillips OP.

  5. Alleviating Poverty Through Vocational Education: The Nigerian ...

    African Journals Online (AJOL)

    The paper concludes that well-articulated vocational education policy and programmes will assist in employment generations and poverty reduction in Nigeria. Keywords: Alleviating Poverty, Vocational Education, Nigerian Experience Journal of Technology and Education in Nigeria Vol. 10 (2) 2005: pp. 10-14 ...

  6. THE NIGERIAN FILM INDUSTRY AND LITERARY ADAPTATION ...

    African Journals Online (AJOL)

    Precious

    Shaka, F.O. History, Genres and Texts of the Emergent Video Film. Industry in Nigeria. Kiabara: Journal of Humanities Vol. 8,. No 1. Port Harcourt: Faculty of Humanities, University of. Port Harcourt, 2002: 11-30. Shaka, F.O. Rethinking the Nigerian Video Film Industry: Technological Fascination and the Domestication Game ...

  7. Neurocognitive Performances in Nigerian Africans with Chronic ...

    African Journals Online (AJOL)

    The cronic renal failure performed poorly in both visual and auditory reaction tasks compared to the controls but the attention span of the patients compared favourably with the controls. We concluded that chronic renal failure affects mental processing speed but has no significant effect on sustained attention in Nigerian ...

  8. Architectural Design and Congregational Patronage in Nigerian ...

    African Journals Online (AJOL)

    Architectural Design and Congregational Patronage in Nigerian Churches. AR Hassan, BF Ogunbodede. Abstract. No Abstract. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians ...

  9. Inappropriate Intensive Care Unit admissions: Nigerian doctors ...

    African Journals Online (AJOL)

    2015-12-04

    Dec 4, 2015 ... therefore assessed the perception and attitude of Nigerian doctors working in the ICU about inappropriate admissions and request for ... In addition, each of the 4 possible actions in the setting of a full ICU was graded from 0 ... Key words: Intensive care, patient admission, perception, resource allocation.

  10. Inappropriate Intensive Care Unit admissions: Nigerian doctors ...

    African Journals Online (AJOL)

    Inappropriate Intensive Care Unit admissions: Nigerian doctors' perception and attitude. ... In addition, each of the 4 possible actions in the setting of a full ICU was graded from 0 (least likely) to 5 (most likely). The result was analyzed as appropriate. Results: Sixty‑four doctors participated in the survey. Inappropriate ...

  11. Sexual dysfunction in Nigerian stroke survivors

    African Journals Online (AJOL)

    EB

    2013-09-03

    Sep 3, 2013 ... Objectives: This survey reports sexual dysfunction in Nigerian stroke survivors, and determines the influence of socio- ... Participants completed the Beck Depression Inventory, Stroke Specific Quality of Life Scale and post-stroke sexual function ..... Medical. Aspects of Human Sexuality 1979; 13: 16-30. 25.

  12. Common echocardiographic abnormalities in Nigerians of different ...

    African Journals Online (AJOL)

    2012-09-17

    Sep 17, 2012 ... Degenerative valvular diseases, left ventricular diastolic dysfunction, and atrial septal defects were the commonest abnormalities in the elderly, middle-aged population and children, respectively. Key words: Different age groups, echocardiographic abnormalities, Nigerians. Date of Acceptance: 17-Sep- ...

  13. The Nigerian Zanthoxylum : chemical and biological values ...

    African Journals Online (AJOL)

    The Nigerian Zanthoxylum is a common component of the rain forest vegetation of Southern Nigeria, and is represented by eleven species. A few of these species occur more abundantly in the savannah and dry forest vegetation of South-western Nigeria. The eleven Zanthoxylum species demonstrate very close similarities ...

  14. Palmar Flexion Creases Variants among Nigerians | Adetona ...

    African Journals Online (AJOL)

    African Journal of Biomedical Research ... Pattern lines A, B and C were the most common patterns among Hausa, Igbo and Yoruba ethnic groups, while lines D to G patterns vary in frequency from 86% to absence of pattern G among Hausa and Igbo ethnic ... Key words: Palmar flexion creases, ethnic groups, Nigerians ...

  15. Management of massive haemoptysis | Adegboye | Nigerian Journal ...

    African Journals Online (AJOL)

    Nigerian Journal of Surgical Research ... Results: Both groups have comparative age and sex distribution and infective pulmonary diseases dominated as causes of massive haemoptysis. ... The number of pneumonectomies were 12 out of 18 procedures (66.7%) for group I and 19 out of 68 procedures (27.9%) in group II.

  16. Word Stress in Cameroon and Nigerian Englishes

    Science.gov (United States)

    Bobda, Augustin Simo

    2010-01-01

    The purpose of this paper is to study the strategies used by Cameroonians and Nigerians to cope with the notorious complexity of English word stress. Stress placement is similar among these two groups, but differs significantly from what obtains in traditional native English speech, received pronunciation (RP), for example. Some of the stress…

  17. Letter to Editor | Tobi | Nigerian Hospital Practice

    African Journals Online (AJOL)

    Knowledge and Experience of Nigerian Anaesthetists about Central Venous Catheterization. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL ...

  18. Nigerian Veterinary Journal Vol. 26 (2), 2005

    African Journals Online (AJOL)

    Nigerian Veterinary Journal Vol. 26 (2), 2005. EFFECT OF ETHYLENE DIAMINE TETRAACETIC ACID (EDTA) ON IN VI TRO. ANTIBACTERIAL ACTIVITY OF TETRACYCLINE AND AMPICILLIN AGAINST. ESCHERICHIA COLI STRAINS. CHAH*1, K.F. AND OBOEGBULEMz, S.I.. [Department of I Veterinary Pathology and ...

  19. SALUTATION AND HEALTH IN NIGERIAN TRADITIONAL SOCIETY ...

    African Journals Online (AJOL)

    mycl

    Mathias & Onyima: Salutation and Health in Nigerian Traditional Society… 77 untimely deaths. The situation in the country over the years has become so tragic that the country is variously described as the “grave yard” “refugee camp” or den of corruption”. The net effect of all these is reflected in the palpable loss of self-.

  20. Congenital hypothyroidism in two siblings | Oduwole | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Quarterly Journal of Hospital Medicine. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 10, No 2 (2000) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. DOWNLOAD FULL TEXT Open Access ...

  1. Determinants of Modern Contraceptive Uptake among Nigerian ...

    African Journals Online (AJOL)

    USER

    Determinants of Modern Contraceptive Uptake among Nigerian. Women: Evidence from the National Demographic and Health. Survey. Ofonime E. Johnson. Department of Community ... La proportion la plus élevée d'utilisation était de 26,7% dans le sud-ouest, tandis que la plus faible était de 2,7% dans le nord-ouest.

  2. Neuroprotection in Glaucoma: A Review | Awoyesuku | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Health Journal. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 11, No 2 (2011) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file. The PDF file you selected should load here if your Web ...

  3. Antimicrobial activities of some selected Nigerian mushrooms ...

    African Journals Online (AJOL)

    Methanolic extracts of five Nigerian mushrooms – Auricularia polytricha, Corilopsis occidentalis, Daldinia concentrica, Daedalea elegans and Tricholoma lobayensis were investigated for their antimicrobial activities using filter paper disc and hole diffusion methods. Bacteria such as Bacillus cereus, Escherichia coli, ...

  4. Nigerian Journal of Biotechnology (Vol. 33)

    African Journals Online (AJOL)

    Ladaf 2

    (Anas platyrhynchos) in Nigeria using mitochondrial DNA D-loop sequences. Abstract. In this study, the maternal genetic diversity and phylogenetic relationship of Nigerian duck populations were assessed. A total of 591 base pair fragment of the mitochondrial DNA (mtDNA). D-loop region of 87 indigenous ducks from two ...

  5. Sex Differences In Anthropometric Characteristics Of Nigerian ...

    African Journals Online (AJOL)

    The aim of this study was to assess the anthropometric and body composition profiles of Nigerian school children. A cross-sectional study was carried out involving 1036 girls and 979 boys aged 9-12 years. Anthropometric measurements, including body mass, stature, triceps, subscapular and medial calf skinfold thickness, ...

  6. Antitrypanosomal and haematological effects of selected Nigerian ...

    African Journals Online (AJOL)

    Studies to determine the effect of some Nigerian Medicinal plants on some haematological parameters of rats infected with T. b. brucei was carried out. The plants investigated and the dose levels per kilogram body weights used are fresh Momordica balsamina pulp (150mg); fresh Aloe vera pulp (1ml); aqueous extracts of ...

  7. Management Issues in Nigerian School Librarianship: Challenges ...

    African Journals Online (AJOL)

    Management Issues in Nigerian School Librarianship: Challenges for School Librarians in the Millennium. ... with the identified millenium challenges. This paper concluded that only those librarians that are receptive to professional developments would be able to cope with the future dictates of the librarianship profession.

  8. Nigerian University libraries and Information and Communication ...

    African Journals Online (AJOL)

    This paper attempts to revisit the strength of Nigerian universities involved in the application of modern-day information technology in their libraries. It also dwells on information technology and how it has turned the world into a global village. The decision to apply automated techniques to library operations should be made ...

  9. THE UNITED STATES AND NIGERIAN RELATIONS:

    African Journals Online (AJOL)

    Mrs. I.D

    Arguably, the US – Nigerian relations before the events on 25th of December, 2009 was a healthy one. However, the attempted suicide ... Consequently, the. United States of America put Nigeria on a watch list of potential terrorist countries. This did not only ... forward by Adeniran, who postulates thus: When statesmen and ...

  10. Page 1 NIGERIAN JOURNAL OF OPHTHALMOLOGY ...

    African Journals Online (AJOL)

    surgery at Mechi Eye Care Centre in Nepal. ſ Comm. Eye Health 2002; 15:28–29. Amosi Muaka. Intraocular lens implantation. Mulago Hospital, Kampala, Uganda. CEH J 1992;. (10): 8–9. Agbeja AM. Intraocular lens implantation, the. Nigerian experience. Afrij MedSci 1994; 23:233-237. Nwosu SNN, Onyekwe LO.

  11. Page 1 NIGERIAN JOURNAL OF OPHTHALMIOLOGY ...

    African Journals Online (AJOL)

    compound myopia. Appropriate provision should therefore be made to correct this visual problem. Keywords: refractive astigmatism, prevalence, types. INTRODUCTION. Refractive error is the most common visual problem among Nigerian adults." It is a common cause of visual impairmentand eye ache and may even cause ...

  12. Knowledge and Perception of Nigerian University Undergraduates ...

    African Journals Online (AJOL)

    Background and Purpose of Study: Commercial motorcycle is a popular mode of mass transportation in Nigeria, which despite its acknowledged benefits has been associated with health and social problems. It is embraced largely by young Nigerians, including university undergraduates who have not been well studied with ...

  13. Nigerian Journal of Animal Science: Submissions

    African Journals Online (AJOL)

    Olusola, O.O., Abunwune, R.N and Adeshola, A.T (2017). Quality evaluation of kilishi, an intermediate moisture meat product sold in Zaria metropolis, Nigeria. Nigerian Journal of Animal Science, 19 (2): 271-279. 2. Salami, R. I and Odunsi, A. A (2017). Growth performance of broiler starter chickens fed varying levels of fibre ...

  14. REVIEW OF CANCRUM ORIS AMONG NIGERIAN CHILDREN

    African Journals Online (AJOL)

    Nigerian children: a review community density and Oral Epidemiology 1985; 13: 190-194. 6. Tempest MN. Cancrum oris. Br J Surg 1966; 53: 949 – 969. 7. Emsile RD. Cancrum oris. Dental Practitioner and Dental record 1963; 13: 481-495. 8. Sawyer DR, Nwoku AL. Cancrum Oris (Noma): past and present. J Dentistry Child ...

  15. Record Management in Nigerian Secondary School Administration

    Science.gov (United States)

    Nakpodia, E. D.

    2009-01-01

    This paper examined the usefulness of record management in Nigerian Secondary Schools. Record keeping is one of the administrative principles in secondary school administration and it cannot be overemphasized in any organisation. The continuity of any school organisation depends on availability of useful records of past activities. In a complex…

  16. Photostress Recovery Time Among Nigerians | Omokhua | Journal ...

    African Journals Online (AJOL)

    Males demonstrated a much sharper and larger increase in PSRT across consecutive age groups when compared to the females at all ages investigated except in the presbyopic age group. This study attempts to establish age related PSRTscores among healthy Nigerians in order to provide a quick reference in comparing ...

  17. Corneal Intelligence | Murdoch | Nigerian Journal of Ophthalmology

    African Journals Online (AJOL)

    Nigerian Journal of Ophthalmology. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 19, No 1 (2011) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Corneal Intelligence. I Murdoch. Abstract. No Abstract.

  18. ~ Nigerian VeterinaryJournal ARTIClE-------------------------------------------

    African Journals Online (AJOL)

    Nigerian VeterinaryJournal. ~. Vol35(2) 995·1006 ... ADEN KOLA, A Y: and OKORO, L.1. Departm,entof Physiology Pharmacology and Biochemistry, College of Veterinary Medicine, University of Agriculture, Makurdi. Nlgena. Corresponding ... defenses against external and internal aggressions such as ROS (SIES, 1993,.

  19. Nigerian Journal of Biotechnology - Vol 21 (2010)

    African Journals Online (AJOL)

    The Effect of Seasons Temperature and Nitrogen Release on Cow Dung and Pig Dung Treatment in Anaerobic Sequencing Batch Reactors · EMAIL FREE FULL TEXT EMAIL FREE ... Nutrient Analysis of Indigenous Fortified Baby Weaning Foods from Nigerian Cereals · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  20. Subcutaneous Sarcoidosis in a Nigerian female

    African Journals Online (AJOL)

    the body but intrathoracic involvement (pulmonary and hilar nodes) ... affecting both genders with slight female preponderance. (4). All age ... in a Nigerian female. Summary. Sarcoidosis is relatively uncommon in indigenous black Africans, especially along the West African coast. There has not been any report of isolated ...

  1. Periodontal Disease Awareness and Knowledge among Nigerian ...

    African Journals Online (AJOL)

    Background: Teacher‑led oral health education is equally effective in improving the oral health knowledge and oral hygiene status of adolescents as dentist‑led and peer‑led strategies. Aim: The aim was to determine periodontal disease awareness and knowledge among Nigerian primary school teachers. Subjects and ...

  2. Nigerian Journal of Biotechnology - Vol 27 (2014)

    African Journals Online (AJOL)

    Review of anticancer and antioxidant activities of radioresistant extremophiles at molecular level: an itinerary to the discovery of cancer drugs in Nigerian extreme radiation environments · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. A M Vatsa, Y I Zakari, J C Igwe, ...

  3. Cytogenetic characterization of Nigerian indigenous pig

    African Journals Online (AJOL)

    STORAGESEVER

    2009-09-15

    Sep 15, 2009 ... chromosome pairs 1 – 7; metacentric chromosome pairs 8 to 12 and telocentric chromosome pairs 13 to 18 with submetacentric XX for female and XY for male. A detailed karyogram was constructed from the obtained results. Key words: Karyotype, Nombre fondamental, Nigerian indigenous pig.

  4. Congruent Transformation | Henry | Journal of the Nigerian ...

    African Journals Online (AJOL)

    ... inside a triangle ABC and P, Q, R are feet of the perpendicular from 0 upon the respective sides BC, CA, AB, then OA + OB + OC > 2(OP+OQ+OP) Keywords: Congruent Transformation, Isometry, Invariant Points, Reflection Journal of the Nigerian Association of Mathematical Physics, Volume 20 (March, 2012), pp 23 – 26 ...

  5. Nigerian Journal of Clinical Medicine: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Journal of Medicine (NJCM) is a biannual journal of the Association of Resident Doctors of the Lagos State University Teaching Hospital which hopes to provide a platform for medical researchers to make contributions that advances/illuminates medical science or practice in all its spheres.

  6. the Rising Profile of Modern Nigerian Art

    African Journals Online (AJOL)

    FIRST LADY

    2011-01-18

    Jan 18, 2011 ... military in Nigerian politics from 1966 to 1999 signaled systemic regression. From the 1980s to 1990s, despite the negative factors prevalent as a result of corruption and mismanagement in the nation, sale of art works was favoured by an astronomical growth in local clientele.. Although Ben Enwonwu,.

  7. Knowledge and perceptions of prostate cancer among Nigerian male immigrants.

    Science.gov (United States)

    Akpuaka, Stella O; Clarke-Tasker, Veronica A; Nichols-English, Gloria J; Daniel, Marlon G; Akpuaka, Aloysius I

    2013-01-01

    Studies focusing on prostate cancer in the Nigerian population, especially Nigerian male immigrants residing in the United States, are limited. Nigerian immigrants are one of the fastest growing populations of Africans currently residing in the United States. According to a report from Migration Policy Institute in Washington DC, 1.4 million African immigrants live in the United States, of which 13.1% or 185,787 are Nigerian-born individuals (Terrazas, 2009). A great number of these African immigrants (159,928/11.3%) currently reside in the Washington metropolitan area. Similar to African American males in the United States, Nigerian men are at high risk for developing prostate cancer. In Nigeria, prostate cancer constitutes 11% of all male cancers making it the #1 ranking cancer among Nigerian men.

  8. The effect of cement creep and cement fatigue damage on the micromechanics of the cement-bone interface

    Science.gov (United States)

    Waanders, Daan; Janssen, Dennis; Mann, Kenneth A.; Verdonschot, Nico

    2010-01-01

    The cement-bone interface provides fixation for the cement mantle within the bone. The cement-bone interface is affected by fatigue loading in terms of fatigue damage, or micro cracks, and creep, both mostly in the cement. This study investigates how fatigue damage and cement creep separately affect the mechanical response of the cement-bone interface at various load levels in terms of plastic displacement and crack formation. Two FEA models were created, which were based on micro-computed tomography data of two physical cement-bone interface specimens. These models were subjected to tensile fatigue loads with four different magnitudes. Three deformation modes of the cement were considered; ‘only creep’, ‘only damage’ or ‘creep and damage’. The interfacial plastic deformation, the crack reduction as a result of creep and the interfacial stresses in the bone were monitored. The results demonstrate that, although some models failed early, the majority of plastic displacement was caused by fatigue damage, rather than cement creep. However, cement creep does decrease the crack formation in the cement up to 20%. Finally, while cement creep hardly influences the stress levels in the bone, fatigue damage of the cement considerably increases the stress levels in the bone. We conclude that at low load levels the plastic displacement is mainly caused by creep. At moderate to high load levels, however, the plastic displacement is dominated by fatigue damage and is hardly affected by creep, although creep reduced the number of cracks in moderate to high load region. PMID:20692663

  9. Synthesis of Portland cement and calcium sulfoaluminate-belite cement for sustainable development and performance

    Science.gov (United States)

    Chen, Irvin Allen

    Portland cement concrete, the most widely used manufactured material in the world, is made primarily from water, mineral aggregates, and portland cement. The production of portland cement is energy intensive, accounting for 2% of primary energy consumption and 5% of industrial energy consumption globally. Moreover, portland cement manufacturing contributes significantly to greenhouse gases and accounts for 5% of the global CO2 emissions resulting from human activity. The primary objective of this research was to explore methods of reducing the environmental impact of cement production while maintaining or improving current performance standards. Two approaches were taken, (1) incorporation of waste materials in portland cement synthesis, and (2) optimization of an alternative environmental friendly binder, calcium sulfoaluminate-belite cement. These approaches can lead to less energy consumption, less emission of CO2, and more reuse of industrial waste materials for cement manufacturing. In the portland cement part of the research, portland cement clinkers conforming to the compositional specifications in ASTM C 150 for Type I cement were successfully synthesized from reagent-grade chemicals with 0% to 40% fly ash and 0% to 60% slag incorporation (with 10% intervals), 72.5% limestone with 27.5% fly ash, and 65% limestone with 35% slag. The synthesized portland cements had similar early-age hydration behavior to commercial portland cement. However, waste materials significantly affected cement phase formation. The C3S--C2S ratio decreased with increasing amounts of waste materials incorporated. These differences could have implications on proportioning of raw materials for cement production when using waste materials. In the calcium sulfoaluminate-belite cement part of the research, three calcium sulfoaluminate-belite cement clinkers with a range of phase compositions were successfully synthesized from reagent-grade chemicals. The synthesized calcium sulfoaluminate

  10. Comparative antibacterial activity of some Nigerian honey and ...

    African Journals Online (AJOL)

    Comparative antibacterial activity of some Nigerian honey and commonly used antiseptic agents against strains of MRSA and other multidrug resistant staphylococci isolates from surgical wound infections.

  11. Retention of gold alloy crowns cemented with traditional and resin cements.

    Science.gov (United States)

    Pinzón, Lilliam M; Frey, Gary N; Winkler, Mark M; Tate, William H; Burgess, John O; Powers, John M

    2009-01-01

    The aim of this study was to measure in vitro retention of cast gold crowns cemented with traditional and resin cements. Forty-eight human molars were prepared on a lathe to produce complete crown preparations with a consistent taper and split into six groups, eight crowns in each group. Crowns were cast in a high-gold alloy and then cemented. After 24 hours, the retention force (N) was recorded and mean values were analyzed by one-way analysis of variance and the Fisher post-hoc least significant difference (PLSD) multiple comparisons test (a = .05). Failure sites were examined under 3100 magnification and recorded. Mean values (SD) for each group in increasing order of retention force were: Harvard Cement: 43 N (27), TempoCem: 59 N (16), PermaCem Dual: 130 N (42), RelyX Luting Cement: 279 N (26), Contax and PermaCem Dual: 286 N (38), and TempoCem with Contax and PermaCem Dual: 340 N (14). The Fisher PLSD interval (P = .05) for comparing cements was 29 N. Zinc-phosphate cement and provisional resin cements had the lowest retention forces. Resin cement with a bonding agent and the hybrid-ionomer cement had similar retention forces. Resin cement with a bonding agent applied after use of a provisional resin cement had a significantly higher retention force than the other cements tested.

  12. Evaluation of the Performance of Local Cements with Imported Class

    African Journals Online (AJOL)

    Portland cement is the most commonly used cement in the oil and gas industry and it accounts for about 99% of all primary cementing operations throughout the world. For Portland cement to qualify as oil well cement, the chemical and physical properties must meet the required standards of the American Petroleum Institute ...

  13. A Twofold Comparison between Dual Cure Resin Modified Cement and Glass Ionomer Cement for Orthodontic Band Cementation.

    Science.gov (United States)

    Attar, Hanaa El; Elhiny, Omnia; Salem, Ghada; Abdelrahman, Ahmed; Attia, Mazen

    2016-12-15

    To test the solubility of dual cure resin modified resin cement in a food simulating solution and the shear bond strength compared to conventional Glass ionomer cement. The materials tested were self-adhesive dual cure resin modified cement and Glass Ionomer (GIC). Twenty Teflon moulds were divided into two groups of tens. The first group was injected and packed with the modified resin cement, the second group was packed with GIC. To test the solubility, each mould was weighed before and after being placed in an analytical reagent for 30 days. The solubility was measured as the difference between the initial and final drying mass. To measure the Shear bond strength, 20 freshly extracted wisdom teeth were equally divided into two groups and embedded in self-cure acrylic resin. Four mm sections of stainless steel bands were cemented to the exposed buccal surfaces of teeth under a constant load of 500 g. Shear bond strength was measured using a computer controlled materials testing machine and the load required to deband the samples was recorded in Newtons. GIC showed significantly higher mean weight loss and an insignificant lower Shear bond strength, compared to dual cure resin Cement. It was found that dual cure resin modified cement was less soluble than glass ionomer cement and of comparable bond strength rendering it more useful clinically for orthodontic band cementation.

  14. Influence of the temperature on the cement disintegration in cement-retained implant restorations.

    Science.gov (United States)

    Linkevicius, Tomas; Vindasiute, Egle; Puisys, Algirdas; Linkeviciene, Laura; Svediene, Olga

    2012-01-01

    The aim of this study was to estimate the average disintegration temperature of three dental cements used for the cementation of the implant-supported prostheses. One hundred and twenty metal frameworks were fabricated and cemented on the prosthetic abutments with different dental cements. After heat treatment in the dental furnace, the samples were set for the separation to test the integration of the cement. Results have shown that resin-modified glass-ionomer cement (RGIC) exhibited the lowest disintegration temperature (pcement (ZPC) and dual cure resin cement (RC) (p>0.05). Average separation temperatures: RGIC - 306 ± 23 °C, RC - 363 ± 71 °C, it could not be calculated for the ZPC due to the eight unseparated specimens. Within the limitations of the study, it could be concluded that RGIC cement disintegrates at the lowest temperature and ZPC is not prone to break down after exposure to temperature.

  15. Catastrophic cement reaction following cementation for megaprosthesis for proximal femoral fracture.

    Science.gov (United States)

    Baig, Muhammad Nouman; Curtin, William; Callaghan, Michael Andrew; Murphy, Colin G

    2017-09-23

    Bone cement implantation syndrome (BCIS) is a well-described and potentially fatal complication of orthopaedic surgery involving pressurised bone cement. Although also described for certain spinal procedures, it is most commonly associated with cemented hip and knee arthroplasty and with cemented hemiarthroplasty following neck of femur fracture in particular.Donaldson et alproposed the definition of BCIS as a syndrome "characterized by hypoxia, hypotension or both and/or unexpected loss of consciousness occurring around the time of cementation, prosthesis insertion, reduction of the joint or, occasionally, limb tourniquet deflation in a patient undergoing cemented bone surgery". Other features include increased vascular resistance, cardiac arrhythmias and cardiac arrest post cement use.We describe a case of a patient who suffered a catastrophic reaction to cement during surgery for a comminuted proximal femoral fracture. © BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  16. Surface pretreatment for prolonged survival of cemented tibial prosthesis components: full- vs. surface-cementation technique

    Directory of Open Access Journals (Sweden)

    Niethard Fritz

    2005-10-01

    Full Text Available Abstract Background One of few persisting problems of cemented total knee arthroplasty (TKA is aseptic loosening of tibial component due to degradation of the interface between bone cement and metallic tibial shaft component, particularly for surface cemented tibial components. Surface cementation technique has important clinical meaning in case of revision and for avoidance of stress shielding. Degradation of the interface between bone cement and bone may be a secondary effect due to excessive crack formation in bone cement starting at the opposite metallic surface. Methods This study was done to prove crack formation in the bone cement near the metallic surface when this is not coated. We propose a newly developed coating process by PVD layering with SiOx to avoid that crack formation in the bone cement. A biomechanical model for vibration fatigue test was done to simulate the physiological and biomechanical conditions of the human knee joint and to prove excessive crack formation. Results It was found that coated tibial components showed a highly significant reduction of cement cracking near the interface metal/bone cement (p Conclusion Coating dramatically reduces hydrolytic- and stress-related crack formation at the prosthesis interface metal/bone cement. This leads to a more homogenous load transfer into the cement mantle which should reduce the frequency of loosening in the interfaces metal/bone cement/bone. With surface coating of the tibial component it should become possible that surface cemented TKAs reveal similar loosening rates as TKAs both surface and stem cemented. This would be an important clinical advantage since it is believed that surface cementing reduces metaphyseal bone loss in case of revision and stress shielding for better bone health.

  17. Pulmonary Cement Embolism following Percutaneous Vertebroplasty

    Directory of Open Access Journals (Sweden)

    Ümran Toru

    2014-01-01

    Full Text Available Percutaneous vertebroplasty is a minimal invasive procedure that is applied for the treatment of osteoporotic vertebral fractures. During vertebroplasty, the leakage of bone cement outside the vertebral body leads to pulmonary cement embolism, which is a serious complication of this procedure. Here we report a 48-year-old man who was admitted to our hospital with dyspnea after percutaneous vertebroplasty and diagnosed as pulmonary cement embolism.

  18. Water dynamics in glass ionomer cements

    Science.gov (United States)

    Berg, M. C.; Jacobsen, J.; Momsen, N. C. R.; Benetti, A. R.; Telling, M. T. F.; Seydel, T.; Bordallo, H. N.

    2016-07-01

    Glass ionomer cements (GIC) are an alternative for preventive dentistry. However, these dental cements are complex systems where important motions related to the different states of the hydrogen atoms evolve in a confined porous structure. In this paper, we studied the water dynamics of two different liquids used to prepare either conventional or resin-modified glass ionomer cement. By combining thermal analysis with neutron scattering data we were able to relate the water structure in the liquids to the materials properties.

  19. Nanofunctionalized zirconia and barium sulfate particles as bone cement additives.

    Science.gov (United States)

    Gillani, Riaz; Ercan, Batur; Qiao, Alex; Webster, Thomas J

    2010-02-02

    Zirconia (ZrO(2)) and barium sulfate (BaSO(4)) particles were introduced into a methyl methacrylate monomer (MMA) solution with polymethyl methacrylate (PMMA) beads during polymerization to develop the following novel bone cements: bone cements with unfunctionalized ZrO(2) micron particles, bone cements with unfunctionalized ZrO(2) nanoparticles, bone cements with ZrO(2) nanoparticles functionalized with 3-(trimethoxysilyl)propyl methacrylate (TMS), bone cements with unfunctionalized BaSO(4) micron particles, bone cements with unfunctionalized BaSO(4) nanoparticles, and bone cements with BaSO(4) nanoparticles functionalized with TMS. Results demonstrated that in vitro osteoblast (bone-forming cell) densities were greater on bone cements containing BaSO(4) ceramic particles after four hours compared to control unmodified bone cements. Osteoblast densities were also greater on bone cements containing all of the ceramic particles after 24 hours compared to unmodified bone cements, particularly those bone cements containing nanofunctionalized ceramic particles. Bone cements containing ceramic particles demonstrated significantly altered mechanical properties; specifically, under tensile loading, plain bone cements and bone cements containing unfunctionalized ceramic particles exhibited brittle failure modes whereas bone cements containing nanofunctionalized ceramic particles exhibited plastic failure modes. Finally, all bone cements containing ceramic particles possessed greater radio-opacity than unmodified bone cements. In summary, the results of this study demonstrated a positive impact on the properties of traditional bone cements for orthopedic applications with the addition of unfunctionalized and TMS functionalized ceramic nanoparticles.

  20. The influence of ultrasound on removal of prefabricated metal post cemented with different resin cements

    Directory of Open Access Journals (Sweden)

    Atiyeh Feiz

    2013-01-01

    Conclusion: Ultrasonic energy did not decrease the retention of posts cemented with Panavia or Maxcem Elite cements. Furthermore, it seems that there is no significant difference between removal force of self-etch (Panavia and the self-etch self-adhesive (Maxcem Elite resin cements.

  1. Prediction of hydroxyl concentrations in cement pore water using a numerical cement hydration model

    NARCIS (Netherlands)

    van Eijk, R.J.; Brouwers, Jos

    2000-01-01

    In this paper, a 3D numerical cement hydration model is used for predicting alkali and hydroxyl concentrations in cement pore water. First, this numerical model is calibrated for Dutch cement employing both chemical shrinkage and calorimetric experiments. Secondly, the strength development of some

  2. Evaluation of cement thixotropy for the cement of oil wells in areas ...

    African Journals Online (AJOL)

    ... economical for cementing job operations in wells with loss zones. The results also show that the effect of LHF is positive, since in addition to his contribution to long term performances, especially the durability of hardened concrete, it improves the thixotropy of cement made of plaster. Keywords: cementing; lost circulation; ...

  3. Early cement damage around a femoral stem is concentrated at the cement/bone interface.

    Science.gov (United States)

    Race, Amos; Miller, Mark A; Ayers, David C; Mann, Kenneth A

    2003-04-01

    This study aimed to improve understanding of the mechanical aspects of cemented implant loosening. After aggressive fatigue loading of stem/cement/femur constructs, micro-cracks and stem/bone micro-motions were quantified to answer three research questions: Are cracks preferentially associated with the stem/cement interface, the cement/bone interface or voids? Is cement damage dependent on axial position? Does cement damage correlate with micro-motion between the stem and the bone? Eight Charnley Cobra stems were implanted in cadaveric femora. Six stem/cement/femur constructs were subjected to "stair-climbing" loads for 300 kcycles at 2Hz. Loads were normalized by construct stiffness to avoid fracture. Two additional constructs were not loaded. Transverse sections were cut at 10mm intervals, stained with a fluorescent dye penetrant and examined using epi-fluorescence stereomicroscopy. Crack lengths and cement areas were recorded for 9 sections per specimen. Crack length-density was calculated by dividing summed crack length by cement mantle area. To isolate the effect of loading, length-density data were offset by the baseline length-density measured in the non-loaded specimens. Significantly more cracks were associated with the interdigitated area (35.1%+/-11.6%) and the cement/bone interface (31.0%+/-6.2%) than with the stem/cement interface (11.0%+/-5.2%) or voids (6.1%+/-4.8%) (psmall, all stems rotated internally. Cement damage did not correlate with micro-motion.

  4. The effect of low dose teicoplanin-loaded acrylic bone cement on biocompatibility of bone cement.

    Science.gov (United States)

    Öztemür, Zekeriya; Sümer, Zeynep; Tunç, Tutku; Pazarcé, Özhan; Bulut, Okay

    2013-06-01

    Antibiotic-loaded acrylic bone cement (polymethylmethacrylate, PMMA) is used to prevent or treat infection in total joint replacement surgery. The purpose of this study was to investigate biocompatibility and cytotoxicity of the teicoplanin-loaded acrylic bone cement. Cytotoxicity examination of acrylic bone cement balls and 400 mg teicoplanin added acrylic bone cement balls conducted by MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay. SEM (Scanning electron microscopy) was used to observe adhesion and spreading of cells on surface of the balls. Cytotoxicity examination conducted by MTT assay on acrylic bone cement balls and teicoplanin-added acrylic bone cement balls revealed no cytotoxicity. SEM analysis put forward that cells started to proliferate and adhere on surface of the samples in both groups as a result of 48-hour incubation and that the cell proliferation over acrylic bone cement and teicoplanin-added acrylic bone cement was similar. As a consequence, there was no cytotoxicity in acrylic bone cement and teicoplanin-added acrylic bone cement groups according to results of MTT assay. On the other hand, results of SEM showed that biocompatibility of both groups was similar. In conclusion, teicoplanin-loaded bone cement did not change biocompatibility of bone cement in studied dose.

  5. Substantial global carbon uptake by cement carbonation

    Science.gov (United States)

    Xi, Fengming; Davis, Steven J.; Ciais, Philippe; Crawford-Brown, Douglas; Guan, Dabo; Pade, Claus; Shi, Tiemao; Syddall, Mark; Lv, Jie; Ji, Lanzhu; Bing, Longfei; Wang, Jiaoyue; Wei, Wei; Yang, Keun-Hyeok; Lagerblad, Björn; Galan, Isabel; Andrade, Carmen; Zhang, Ying; Liu, Zhu

    2016-12-01

    Calcination of carbonate rocks during the manufacture of cement produced 5% of global CO2 emissions from all industrial process and fossil-fuel combustion in 2013. Considerable attention has been paid to quantifying these industrial process emissions from cement production, but the natural reversal of the process--carbonation--has received little attention in carbon cycle studies. Here, we use new and existing data on cement materials during cement service life, demolition, and secondary use of concrete waste to estimate regional and global CO2 uptake between 1930 and 2013 using an analytical model describing carbonation chemistry. We find that carbonation of cement materials over their life cycle represents a large and growing net sink of CO2, increasing from 0.10 GtC yr-1 in 1998 to 0.25 GtC yr-1 in 2013. In total, we estimate that a cumulative amount of 4.5 GtC has been sequestered in carbonating cement materials from 1930 to 2013, offsetting 43% of the CO2 emissions from production of cement over the same period, not including emissions associated with fossil use during cement production. We conclude that carbonation of cement products represents a substantial carbon sink that is not currently considered in emissions inventories.

  6. Energy use trends in the cement industry

    Energy Technology Data Exchange (ETDEWEB)

    Farias, L. [Cemex Corporation (Mexico)

    2000-07-01

    The overheads/viewgraphs give statistics and trace trends on the use of coal in the cement industry in the different regions of the world. Coal is still the dominant fuel in the cement industry in North America, Asia and Europe but in Latin America the choice depends on each country's domestic energy structure. Petcoke is becoming an important fuel in Europe and the US and also Brazil. The differences in the coal and petcoke markets that influence the cement consumer are discussed. Although Cemex has in the last decade favored petcoke, the market for petcoke in the cement industry is expected to remain small.

  7. Localized Tetanus in Lagos, Nigeria | Okubadejo | Nigerian ...

    African Journals Online (AJOL)

    Localized tetanus is rare in Nigerians, with an incidence of 1.8% in a previous report. We report six cases of localized tetanus out of total of 95 cases of tetanus seen at the Lagos University Teaching Hospital over a period of 3 years. All cases were seen and managed by one or both of the authors, the policy in the hospital ...

  8. Chromosome studies in Sesamum indicum | Falusi | Nigerian ...

    African Journals Online (AJOL)

    No Abstract. Nigerian Journal of Genetics Vol. 20 2006: pp. 61-65. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.4314/njg.v20i1.42254 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More ...

  9. Perception Of Change Management In Nigerian Universities

    OpenAIRE

    Hassan Banjo Ally; Obasan Kehinde Agbolade; Abass Hassanat Adunni

    2016-01-01

    Organizational management are concerned with the effect of both radical and sudden changes can have on individual relationship with the organization and the organization as a whole. In line with this, the study attempt to assess employees’ perception of change management in Nigerian universities by investigating the relationship between change management and employee commitment on one hand, success and failure of change initiatives and employees’ readiness and resistance to change initiatives...

  10. THE SEMIOTICS OF LAUGHTER IN TWO NIGERIAN APOLITICAL ...

    African Journals Online (AJOL)

    Mitch

    THE SEMIOTICS OF LAUGHTER IN TWO NIGERIAN APOLITICAL MOVIE-. COMEDIES. KINGSLEY I. EHIEMUA. ABSTRACT. This paper examines the iconic, indexical and symbolic signs which provoke laughter in two Nigerian apolitical movie comedies, namely: “Nnaa Meen” and “Touch and. Follow”. The tendency here ...

  11. Implications of Capital Punishment in the Nigerian Society | Uche ...

    African Journals Online (AJOL)

    Although, opinion pool seems high on ways of moving Nigeria forward, however, mute indifference and cold passivity have characterized the cherished dreams of most Nigerians. The over emphasis on material gains have compounded and increased criminal tendencies in Nigerians. A systematic look at the implications of ...

  12. Aina Onabolu and Naturalism in Nigerian Visual Arts | Irivwieri ...

    African Journals Online (AJOL)

    This paper focuses on Aina Onabolu's creative exploits in the Nigerian Art Scene. There is the contention as to whether his techniques of artistic expression promoted or marred the realization of true Nigerian art. The writer seeks to examine the work of the artist and his techniques, the evolutionary stages of this naturalistic ...

  13. Plasma cholesterol and sodium in some Nigerians | Ighoroje ...

    African Journals Online (AJOL)

    Cholesterol moderates the fluidity of cell membrane and this in turn controls the transmembrane movement of Na+. We have thus attempted to investigate the relationship of serum cholesterol and Na+ concentrations in some Nigerians. Blood samples were obtained from 122 healthy adult Nigerians and the plasma ...

  14. 82 SEMIOTIC READING OF COSTUMES IN NIGERIAN VIDEO FILMS

    African Journals Online (AJOL)

    Prof Alex C Asigbo

    which are distinctly Nigerian are now being transmitted as images around the globe through the Nigerian video films. .... of semiotics in his book Course in General Linguistics…A science that studies the life of signs within society is ..... taste, and self-image” (149). Fashion choices and brand names act as symbols that ...

  15. Cultural Explanations Of The Status Of Nigerian Women | Ajayi ...

    African Journals Online (AJOL)

    This paper focuses on the subordinate position of Nigerian women in the culture of male supremacy gender inequality/discrimination and socio- cultural environment which acts against the principles of social justice and equality enshrined in the Nigerian constitution. Culture is presented here as a strong explanatory ...

  16. Nigerian creative writing in French: Challenges and prospects ...

    African Journals Online (AJOL)

    Nigerian creative writing in French is a recent phenomenon compared to Francophone or Lusophone literature. Since the publication of Ola Balogun's Sango suivi de le Roi elephant (1968), Nigerians have shown their creative abilities in a language, which is their second foreign language after English. This paper, seeks to ...

  17. Writing resistance: Dissidence and visions of healing in Nigerian ...

    African Journals Online (AJOL)

    In spite of the fact that about thirty years of military rule impacted negatively on various spheres of Nigerian life, this essay argues that it also served as a catalyst for the growth of Nigerian poetry. It contests the critical standpoint that exclusively identifies socially sensitive poetry in Nigeria in the closing decades of the ...

  18. A critical appraisal of euthanasia under Nigerian laws | Obi | Nnamdi ...

    African Journals Online (AJOL)

    Although it is widely accepted that murder is crime under the Nigerian law, a clearly defined stand has not been taken on euthanasia. The Nigerian populace views euthanasia as an unnecessary paradox, murder in disguise, a situation where the supposed healer becomes a killer. This, therefore, forms the nitty-gritty of ...

  19. Monetization in the Nigerian public service: issues, challenges and ...

    African Journals Online (AJOL)

    This study evaluates the introduction of monetization of fringe benefits enshrined by government in 2003 as a panacea to enhance efficiency and effectiveness in the Nigerian public sector. The twin issue of efficiency and effectiveness has been a growing concern in the Nigerian public service which has led to monetization.

  20. Relevance of Corporate Governance in Nigerian Banks | Akinyomi ...

    African Journals Online (AJOL)

    This paper examines the relevance of Corporate Governance in Nigerian Banks. Although corporate governance is of general interests to the Nigerian public, that of the banking industry is of particular interest because of the published figures, attributes and activities of the banking institutions. Because every economy ...

  1. Perceived Impact of Terrorism on Nigerian Youths and Society ...

    African Journals Online (AJOL)

    Terrorism is a hydra-headed global phenomenon but it has recently become a recurring menace in Nigeria, unleashing trauma, fear and psychological disorientation on individuals and the Nigerian society. Currently the news of any terrorist attack sends shock waves through the spines of Nigerians followed by apathy.

  2. Nigerian university students' conception of and attitudes toward drug ...

    African Journals Online (AJOL)

    This study investigated the Nigerian university students' conception of and attitude towards drug abusers. Nigerian University students have different opinions and attitudes toward drug abuse. Many opine that drug abusers are friendly, loyal, honest and hardworking while others feel that they do not have these qualities.

  3. Nigerian university libraries and the question of marketing ...

    African Journals Online (AJOL)

    This paper makes a case for marketing library and information services in Nigerian University Libraries. It examines the practice and problems of marketing library and information services in Nigerian Universities as well as chart the way forward in dealing with identified problems. It further posits that if carefully planned and ...

  4. HCV and HBV infections in Nigerian Patients with Liver Cirrhosis ...

    African Journals Online (AJOL)

    The present study is aimed at determining the incidence of HCV and HBV infections in Nigerian patients with Liver Cirrhosis (LC) and Hepatocellular Carcinoma (HCC). The incidence of HBV and antibodies to HVC was determined by Enzyme Linked Immunosorbent Assey (ELISA) in 24 Nigerians with histologically ...

  5. ICT's, Service Delivery and Operational Performance in Nigerian ...

    African Journals Online (AJOL)

    This paper examined these issues with specific focus on the Nigerian banking industry. The paper sought to answer the questions of how far are ICTs diffused in the Nigerian Banking sector, what kind of ICTs are adopted and what factors determine this, and in what ways has the adoption of ICTs influenced the operational ...

  6. Democracy and the future of the Nigerian State | Gberevbie | Journal ...

    African Journals Online (AJOL)

    It observed that past governments failed in the area of development and peaceful co-existence of Nigerians due to their non-adherence to democratic values and application of the principle of true fiscal federalism. It therefore recommended that for the future of the Nigerian state to be guaranteed, government at all levels ...

  7. An intense Nigerian stock exchange market prediction using logistic ...

    African Journals Online (AJOL)

    This paper is a continuation of our research work on the Nigerian Stock Exchange Market (NSEM) uncertainties, In our previous work (Magaji et al, 2013) we presented the Naive Bayes and SVM-SMO algorithms as a tools for predicting the Nigerian Stock Exchange Market; subsequently we used the same transformed data ...

  8. Impact of Global Financial Crisis on Nigerian Stock Market

    African Journals Online (AJOL)

    DrNneka

    crisis, and foreign investment crisis has a negative significant impact on the Nigerian stock market. Based on ... The ripple effects of the global financial crisis seem to have had a dramatic negative effect on the Nigerian stock ... is evident in his statement that the pace of financial and economic globalisation appears to have ...

  9. Nigerian highlife music: a survey of the sociopolitical events from ...

    African Journals Online (AJOL)

    This notwithstanding, the number of researches carried out in highlife is still insignificant in comparison to other areas of music, even though its place in Nigerian history is incontestable given its social, political and economic significance during the struggle for independence and the period of the Nigerian civil war. Although ...

  10. Academic Quality Control in Nigerian Universities: Exploring Lecturers' Perceptions

    Science.gov (United States)

    Obiekezie, E. O.; Ejemot-Nwadiaro, R. I.; Essien, M. I.; Timothy, A. Essien

    2014-01-01

    The level of job performance, international comparability and competitiveness of Nigerian university graduates are burning issues. Consequently, the academic quality of Nigerian universities has come under severe criticism. Since university lecturers are key players in quality control in universities, this study explored their perceptions of…

  11. The Determining Status of Aesthetics in Contemporary Nigerian ...

    African Journals Online (AJOL)

    The hypothetical stance of the present study is that aesthetics is the foundation upon which theatre practice in general, and contemporary Nigerian theatre practice, specifically is constructed. I have argued that it is a truism that contemporary Nigerian theatre comprises diverse forms and styles generally categorised as ...

  12. Development of a Nigerian Business Law Module for Business ...

    African Journals Online (AJOL)

    Development of a Nigerian Business Law Module for Business Students at the University of Hull, United Kingdom. ... of students are business owners undergoing a part time programme in business administration who are interested in investing in the Nigerian economy via the medium of foreign direct investment.

  13. Nigerian Journal of Natural Products and Medicine: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. Nigerian Journal of Natural Products and Medicine is published by the Nigerian Society of Pharmacognosy, a non profit organisation established in 1982 dedicated to the promotion of Pharmacognosy, Natural Products and Traditional Medicine. It has a current circulation of about 500 to scientists in ...

  14. Anterior Face Height Values in a Nigerian Population

    African Journals Online (AJOL)

    2012-12-11

    Dec 11, 2012 ... understanding of anterior face profile of Nigerians and it will facilitate studies on evaluation of facial attractiveness. One of. Anterior Face Height Values in a Nigerian Population. Folaranmi N, Isiekwe M1. Departments of Child Dental Health, University of Nigeria Teaching Hospital, Enugu, 1Lagos University ...

  15. Academic Quality Assurance Variables in Nigerian Universities: Exploring Lecturers' Perception

    Science.gov (United States)

    Obiekezie, Eucharia O.; Ejemot-Nwadiaro, Regina I.; Timothy, Alexander E.; Essien, Margaret I.

    2016-01-01

    The level of job performance, international comparability and competitiveness of Nigerian university graduates are burning issues. Consequently, the academic quality of Nigerian universities has come under severe criticism. Since university lecturers are key players in quality assurance in universities, this study explored their perceptions of…

  16. Religious Factors in the Nigerian Public Sphere: Burdens and ...

    African Journals Online (AJOL)

    The main thrust of this paper is that religious factors in the Nigerian public sphere have not received much scholarly attention. This is the gap the paper fills as it highlights religious factors in the Nigerian public sphere, which are exemplified in the spiritualisation of politics and election, the interpretation of political ...

  17. Drivers Dexterity: George Osodi's Oeuvre on Safety on the Nigerian ...

    African Journals Online (AJOL)

    This paper attempted a reading of the Nigerian condition using the censure of images culled from an exhibition by the Nigerian photographer George Osodi. Drawing attention to the shapes of the images and imageries that constitute the profile of the condition of a major infrastructure, the road and transportation, I have ...

  18. Zulu Sofola and the Nigerian Theatre Influences and Traditions | Eni ...

    African Journals Online (AJOL)

    This paper examines two of Zulu Sofola's works with a view to establishing the level of influence which she welds on the Nigerian stage and in the growing Nigerian feminist writings. As a pioneer female writer in Nigeria, the paper focuses on the major influences that shaped her works with a view to a better understanding ...

  19. Advancing the role of ICT in Nigerian university libraries | Ekong ...

    African Journals Online (AJOL)

    This paper examines the importance, implications, and opportunities of ICT in Nigerian University libraries in the Information Age. It addresses possible areas of importance and advantages that can propel Nigerian universities and their libraries into being key players in the global IT revolution thereby enhancing their status ...

  20. The drama of Ahmed Yerima : studies in Nigerian theatre

    NARCIS (Netherlands)

    Julius-Adeoye, ‘Rantimi Jays

    2013-01-01

    The Drama of Ahmed Yerima. Studies in Nigerian Theatre gives a detailed development of Nigerian theatre from its ritualistic nature in the 16th Century up to the literary form of the 21st century. It looks at the trajectory movement of the theatre through television to cinema and video

  1. The Nigerian Civil War as a Domestic Determinant of Nigeria's ...

    African Journals Online (AJOL)

    In behaviours external to her, Nigeria over years has been influenced by myriad of factors, some external, some internal. Within the domestic milieu of the Nigerian foreign policy this paper locates and concentrates on the Nigerian civil war. The paper webs a classic retrospection and xray of the foreign policy implications of ...

  2. Instrumentation as a Stylistic Determinant in Nigerian Gospel Music ...

    African Journals Online (AJOL)

    Generally, in Africa, musical instruments perform various functions, both musical and non-musical. In Nigerian gospel music these functions are not only found but also have expanded. In this paper, various musical instruments used in Nigerian gospel music are described and categorized before discussing their musical, ...

  3. Diabetic Retinopathy in Nnewi, Nigeria | Nwosu | Nigerian Journal of ...

    African Journals Online (AJOL)

    Diabetic retinopathy is not rare in Nigerians. Diabetics should be educated on the ocular complications of the disease. Since laser and vitreo-retinal surgery will reduce visual loss in the patients, these facilities should be provided in eye hospitals in Nigeria. Nigerian Journal of Ophthalmology Vol. 8, No.1 (August 2000): pp ...

  4. Generic Structure Potential Analysis of Feature Articles in Nigerian ...

    African Journals Online (AJOL)

    This paper investigated the generic structure potential of feature articles in four Nigerian newspapers: The Punch, The Nation, Vanguard and Nigerian Tribune. Halliday and Hassan's concept of Generic Structure Potential served as the theoretical framework. The feature articles analysed had three obligatory elements: ...

  5. Primary Testicular Lymphoma In Nigerian Males: Case Report and ...

    African Journals Online (AJOL)

    Primary Testicular Lymphoma In Nigerian Males: Case Report and Clinicopathological Review. ... A review of cases of primary testicular lymphoma seen within a period of twelve years at the OAUTHC Nigeria was carried out. Three cases of primary testicular ... Key Words: testicular, lymphoma, Non- Hodgkin Nigerian ...

  6. An Analysis of the Factors Responsible for Errors in Nigerian ...

    African Journals Online (AJOL)

    The paper presents an empirical study of factors responsible for errors in Nigerian construction documents and aims at identifying the significant factors that are responsible for errors in the Nigerian construction documents. Information was obtained from both consultants (the producers of construction documents) and ...

  7. Single dose pharmacokinetics of mefloquine in healthy Nigerian ...

    African Journals Online (AJOL)

    Single dose pharmacokinetics of mefloquine in healthy Nigerian male subjects. A Mustapha, JA Kolawole. Abstract. Single dose pharmacokinetics of mefloquine was determined in SJ ic healthy Nigerian male subjects. Mefloquine 500mg single dose was administered and blood sa mples were collected 11t intervals.

  8. Juvenile Dermatomyositis in a Nigerian Girl: a Case Report ...

    African Journals Online (AJOL)

    Juvenile Dermatomyositis in a Nigerian Girl: a Case Report. MG Mustapha, MG Ashir, AA Mayun, Y Machoco, AB Ibrahim. Abstract. A case of Juvenile dermatomyositis (JDM) in a 10 year old Nigerian girl is herein reported to discuss some of the features of the disease and challenges in management of such a rare but ...

  9. Building Savings and Investments Culture among Nigerians | Imegi ...

    African Journals Online (AJOL)

    Building Savings and Investments Culture among Nigerians. ... It is therefore necessary to build among Nigerians savings and investments culture. ... Savings can be done through piggy, stokvel, thrift collection, credits unions, and banking system while investment is in the form of real asset, financial asset, and foreign ...

  10. Prospects of studying magical realism in Nigerian literature ...

    African Journals Online (AJOL)

    This paper exposes some of the reasons why magical realism is an interesting topic in literary studies today. It is a brief review of some notable magic realist writers and their popular works. It draws attention to the possibility of studying magical realism in Nigerian literature using the novels of some Nigerian authors who ...

  11. Evaluating an Educational Program for Parents: A Nigerian Pilot Study

    Science.gov (United States)

    Ofoha, Dorothy; Saidu, Rosemary

    2014-01-01

    Despite the evidence pointing to its detrimental child outcomes, physical punishment remains one of the most commonly used techniques to discipline children in many Nigerian homes. Research has revealed that a majority of Nigerian parents are not aware of the negative consequences. They are also not aware of nonaversive ways to discipline…

  12. Tumour markers and hepatitus C virus infection in Nigerian patients ...

    African Journals Online (AJOL)

    Tumour markers and hepatitus C virus infection in Nigerian patients with liver diseasse. OS Ola, OJ Ogunbiyi, OD Olaleye, EA Ayoola. Abstract. No Abstract. Nigerian Journal of Medicine Vol. 15 (4) October-December 2006: 417-420. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD ...

  13. Scopulariopsis associated meningitis in adult Nigerian AIDS patient ...

    African Journals Online (AJOL)

    Scopulariopsis associated meningitis in adult Nigerian AIDS patient — A case report. *C. Nwabuisi, A. K. Salami, N. A. ... filamentous fungal meningitis caused by Scapulariaflsis species in a 38 year old Nigerian male. ... A treatment of oral Azithrornyein 500mg daily and 1 gm paracetamol three times daily for 3 days ...

  14. Structural Reliability of the Nigerian Grown Abura Timber Bridge ...

    African Journals Online (AJOL)

    Structural reliability analysis was carried out on the Nigerian grown Abura timber, to ascertain its structural performance as timber bridge beams. Samples of the Nigerian grown Abura timber were bought from timber market, seasoned naturally and their structural/strength properties were determined at a moisture content of ...

  15. Nigerian Journal of Technological Development: About this journal

    African Journals Online (AJOL)

    Nigerian Journal of Technological Development: About this journal. Journal Home > Nigerian Journal of Technological Development: About this journal. Log in or Register to get access to full text downloads. ... Submissions. » Author Guidelines; » Copyright Notice; » Privacy Statement ...

  16. Linguistic Convergence in Diversity: Nigerian English as a ...

    African Journals Online (AJOL)

    We suggest that it is this variety of English that should be encouraged by language policy, to be used in most domains of our lives as Nigerians; alongside our native tongues which themselves must be assigned specific roles in the language repertoire of individual Nigerian. Humanities Review Journal Vol. 7 2007: pp.

  17. Issues on the Gagging of Nigerian Press with Obnoxious Laws ...

    African Journals Online (AJOL)

    This study examined the issues on the gagging of Nigerian press with obnoxious laws and it investigated the rate at which the Nigerian media had been prevented from expressing opinion freely by dictatorial leaders who enacted draconian laws to suppress facts and figures. Also, the study identified the major activities of ...

  18. Membership of the Nigerian Library Association and Job Performance

    African Journals Online (AJOL)

    Pearson Product Moment Correlation (PPMC) and simple regression analysis were the statistics used. The result revealed a significant relationship between membership of Nigerian Library Association and job performance of Librarian. Also the construct could predict job performance of librarians in Nigerian University ...

  19. DESIGNING THE SET IN NIGERIAN HOME VIDEO FILMS: A STUDY ...

    African Journals Online (AJOL)

    Mitch

    DESIGNING THE SET IN NIGERIAN HOME VIDEO FILMS: A STUDY OF. AMAZING GRACE. EMMANUEL A. EREGARE & ONAJITE K. AKPOBOME. ABSTRACT. The Nigerian movie industry has grown to be a very popular art that welcomes any new player so care is not taken to apply all the techniques of good filmmaking.

  20. Out of Africa: Trends and Themes of Nigerian Home Videos ...

    African Journals Online (AJOL)

    Since its emergence, the Nigerian movie industry “Nollywood”1 or “Naijawood” has had a profound influence on African and world cultures – through the transmission of the distinctly Nigerian accents, idiomatic expressions, style of dress, and behavioral idiosyncrasies as images worldwide.

  1. The effects of debt burden on the Nigerian economy | Ogege ...

    African Journals Online (AJOL)

    This paper sets out to examine the impact of debt burden on the Nigerian economy. It specifically seeks to ascertain the effect of debt burden on the growth of the Nigerian economy. Nigeria's data set from the CBN Statistical Bulletin volume 18, (2007) during the period 1970-2007 was used. It employs the ordinary least ...

  2. Development of ZSM-5 Zeolite from Dealuminated Nigerian Ahoko ...

    African Journals Online (AJOL)

    ... prepare highly crystalline ZSM-5 from dealuminated metakaolin eliminating quartz which was a major weakness of the earlier synthesis of the zeolite from Nigerian Ahoko metakaolin. Keywords: Hydrothermal synthesis, dealumination, ZSM-5, Nigerian Ahoko kaolin (NAK), X-ray fluorescence (XRF) and Characterisation ...

  3. Forensic accounting and fraudulent practices in the Nigerian public ...

    African Journals Online (AJOL)

    The broad objective of this study was to examine forensic accounting and fraudulent practices in the Nigerian public sector. The specific objective was to find out if there exists a significant relationship between forensic accounting and fraudulent practices in Nigerian public sector. The study employed the survey descriptive ...

  4. Projecting Nigerian Image through the Globalization of Her Dances ...

    African Journals Online (AJOL)

    The historical methodology is employed. The findings of this paper is that Nigerian dances have not benefited from globalization because, many of our dances and dance patterns have been stolen and repackaged to us as Western Euro-America cultural products. The paper therefore posits that Nigerians should take their ...

  5. Managing Language Testing in Nigerian Large Classes: Processes and Prospects

    Science.gov (United States)

    Abioye, Taiwo

    2010-01-01

    The demand for literacy in a developing country like Nigeria has multiple results such as the expansion, by leaps and bounds, of the average Nigerian classroom. This paper highlights the reasons for large classes in Nigerian secondary schools, the educational and psychological dimensions of language testing in large classes, the challenges of such…

  6. Micro-trephination Glaucoma Surgery In Nigerians: 10 Years Outcome

    African Journals Online (AJOL)

    The aim of this study was to show the effectiveness of microtrephination glaucoma surgery in Nigerians followed up for up to 10 years. Eight eyes of 5 Nigerian patients who had microtrephination glaucoma surgery at DDS Eye Surgery, Benin City and the University of Benin Teaching Hospital Benin City were followed up for ...

  7. Selected administrative ingredients for sports culture in Nigerian ...

    African Journals Online (AJOL)

    Sports have not been regarded fully as an academic activity in Nigerian Universities culturally. The thrust of this paper was the examination of selected administrative tools for sports culture in Nigerian Universities. Matters discussed in the study encompassed culture in relation to sports participation, facilities, equipment and ...

  8. Frequency of relapse among Nigerian children with steroid‑sensitive ...

    African Journals Online (AJOL)

    Background: The clinical course of steroid‑sensitive nephrotic syndrome (SSNS) among Nigerian children has rarely been reported; this makes prognostication difficult. Objectives: The objective was to determine the frequency of relapses including frequent relapses (FR) and steroid‑dependence (SD) in a cohort of Nigerian ...

  9. The Metamorphosis of Bourgeoisie Politics in a Modern Nigerian ...

    African Journals Online (AJOL)

    The Nigerian military class turned into Bourgeoisie class has credibility problems in the Nigerian state and politics. The paper interrogates their metamorphosis and masquerading character as ploy to delay the people-oriented revolution. The just-concluded PDP party primaries and secondary elections are evidence that ...

  10. Glycemic Response of some Local Nigerian Drinks in Healthy ...

    African Journals Online (AJOL)

    Objective: This study was designed to determine the postprandial glycemic responses of healthy Nigerian subjects to five traditional drinks as a preliminary to the detailed study of the Nigerian mixed diet and identify drinks suitable for vulnerable groups such as diabetic patients. Subjects and methods: The drinks ...

  11. Pattern of Eye Disorders among Inmates of a Nigerian Prison ...

    African Journals Online (AJOL)

    Aim: To determine the prevalence of eye disorders among the inmates of a Nigerian prison with a view to providing eye health care for the prisoners. Methods: A cross sectional survey of the ocular health status of the prisoners in a Nigerian prison was carried out using a pretested protocol designed for the study. Data was ...

  12. Poetics and Subjectivity in Contemporary Nigerian Poetry: Afam ...

    African Journals Online (AJOL)

    One of the features of contemporary Nigerian poetry in English is the clear thematic space it maps out for itself, namely a concern with the travails and triumphs of the ordinary people in the society. This amounts to displacing poetry and poetics from a certain level of esotericism. Since the 1970s Nigerian poets writing in ...

  13. An Analysis of Female Research Productivity in Nigerian Universities

    Science.gov (United States)

    Ogbogu, Christiana O.

    2009-01-01

    This study examines the research output of female staff and the factors that affect their research productivity in the Nigerian university system. The study was carried out with a view to promoting strategies that will enhance productivity and increase the research output of female staff in Nigerian universities. The study adopted a survey…

  14. the trouble with nigerian universities: bogus policy and speculative ...

    African Journals Online (AJOL)

    PROF EKWUEME

    Osokoya, I. 0., 1995. History and Policy of. Nigerian Education in World Perspective lbadan: AMD Publishers. Osokoya, I. O., 1989. History and Policy of. Nigerian Education in World Perspective: Ibadan: AMD Publishers. Peters, R. S., 1973. The Concept of Education. London Routledge and Kegan Paul. Piaget, Jean., 1965.

  15. Prevalence of Skin Diseases in Nigerian Children: - (The University ...

    African Journals Online (AJOL)

    ... urticaria and atopic dermatitis are important dermatological problems in our environment. Implementation of public health policies and improvement in personal hygiene would reduce the prevalence of skin diseases in Nigerian children. Keywords: Prevalence; Skin diseases; Children. Nigerian Journal of Medicine Vol.

  16. Hydroxyurea therapy in adult Nigerian sickle cell disease: a ...

    African Journals Online (AJOL)

    Background: The clinical prospects of hydroxyurea therapy in the management of sickle cell disease (SCD) require evaluation in the Nigerian setting to develop indigenous guidelines. This survey examines the pattern of hydroxyurea therapy, its clinico-haematologic benefits and safety profile in Nigerian SCD subjects.

  17. Haemorheological parameters of umbilical cord blood of Nigerian ...

    African Journals Online (AJOL)

    Background: Published reports of haemorheological values of umbilical cord blood in Nigerian newborns are relatively scanty. The present study therefore aimed to determine the values of some basic haemorheological parameters in the umbilical cord blood of Nigerian neonates and in the venous blood of their respective ...

  18. Constraints to Investment Upsurge in the Nigerian Economy ...

    African Journals Online (AJOL)

    Constraints to Investment Upsurge in the Nigerian Economy. ... Economic and Policy Review ... that the Nigerian government has taken various salient steps toward enhancing the investment climate in the economy, particularly, by promoting the participatory role of the private-sector in socioeconomic development.

  19. Between Convention and Realism: The Nigerian People's Definition ...

    African Journals Online (AJOL)

    This paper critically examines the meaning of democracy from a broad perspective and goes beyond the conventional conceptualizations to report what the Nigerian people mean by democracy. The paper is empirical. It draws some implications from the position of „realism democracy. taken by Nigerians as well as offers ...

  20. Comparing permanent tooth sizes of Nigerians and American Negroes

    African Journals Online (AJOL)

    sizes of Nigerians have been that of Mack P.J3 while those on. American Negroes have been by Richardson and Malhotra in. 1975 where normal values were established for male and female. American Negroes. The aim of this paper is to compare the mesiodistal crown dimensions of Nigerians and American Ne- groes.

  1. Sex identification of Nigerian indigenous chicks using Auto-sexing ...

    African Journals Online (AJOL)

    Sexing has been a challenging task in Nigerian indigenous chickens due to the monomorphism of chicks which makes it impossible to distinguish the male from the female until eight weeks. . Therefore, this study was carried out to determine the sex of Nigerian indigenous chicks using the common auto-sexing methods.

  2. Genetic diversity between large white and nigerian indigenous ...

    African Journals Online (AJOL)

    Sixty-two pigs (32 large white pigs and 32 Nigerian indigenous pigs were used in this study. Biochemical techniques were used in analyzing the blood serum samples obtained from the pigs using Polyacrylamide Gel Electrophoresis. A total of 14 loci were scored for the Nigerian Indigenous pigs and 10 for the Large White ...

  3. Nigerian College Students\\' Attitudes about Love, Marriage and ...

    African Journals Online (AJOL)

    214 (116 females and 98 males) Nigerian college students enrolled in three Nigerian universities responded to a questionnaire designed to replicate a previous study of African- American college students' attitudes about love, marriage and sexual relations. The results showed that in agreement with previous studies, none ...

  4. Some mandibular geometry of Eastern Nigerians | Didia | Orient ...

    African Journals Online (AJOL)

    Objective: To determine mean values of the mandibular angle, mandibular length and mandibular ramus height in Nigerians of Eastern origin. Methods: A prospective study of 34 prepared mandibular bones of Eastern Nigerians was conducted. The measurements were done using the mandibulometer according to ...

  5. Effectiveness of Nigerian Bamboo Activated with Different Activating ...

    African Journals Online (AJOL)

    The effectiveness of Nigerian Bamboo activated with different activating agents on the adsorption of BTX was investigated. A series of activated carbons was prepared from Nigerian bamboo, carbonized at 400oC – 500oC and impregnated with different concentrations of four acids at 800oC in a muffle furnace for 2 hours.

  6. Nigerian Popular Music: Its Problems and Prospects in Development ...

    African Journals Online (AJOL)

    There is hardly any aspect of life without the involvement of any of the diverse arrays of styles existing in Nigerian popular music scene. The appeal of this genre cuts across class, ethnicity, age, sex and faith, thus affecting millions of lives. Consequently, the contribution of Nigerian popular music cannot be quantified.

  7. Nigerian Gospel Music in a Globalized Context | Adedeji | Journal of ...

    African Journals Online (AJOL)

    Nigerian gospel music, one of the most popular musical genres in contemporary Nigeria started about four decades ago. It has influenced several aspects of the national culture and served as a means of livelihood for several artistes and music industrialists. In contemporary globalization, Nigerian gospel music has been ...

  8. The Nigerian financial crisis: A reductionist diagnosis | Famuyiwa ...

    African Journals Online (AJOL)

    The crisis in the Nigerian financial system from 2008 to 2009 triggered an explosion of scholarly debates on the legal and institutional inadequacies of the Nigerian financial regulatory system that contributed to its inability to anticipate or prevent the financial crisis. Many of the analyses however have yet to consider closely ...

  9. Mythic displacement in Nigerian narratives: An introduction

    Directory of Open Access Journals (Sweden)

    Ignatius Chukwumah

    2013-12-01

    Full Text Available http://dx.doi.org/10.5007/2175-8026.2013n65p73 Five decades of resorting to humanistic critical procedureshave bequeathed to the Nigerian critical practice the legacy ofexamining and discovering in Nigerian and African narrativesthe historical and social concepts of the time and times theyare presumed to posit. These concepts include colonialism,corruption, war, political instability, and culture conflict. Theseprocedures are undertaken without due regard to seeing the wholeof the literary tradition as a stream out of which narratives emerge.This article, therefore, by way of introduction, seeks to retrieveNigerian narratives from “every author” and humanistic criticalapproach by placing them in a realm where a holistic method suchas Frye’s could be applied. Here, the traverses of the structure ofmythical imagery such as the mythos of crime and punishmentas embodied in these narratives and how this structure wasdisplaced/shrouded from Frye’s first mimetic mode to the last, viathe concept of mythic displacement, will be analysed.

  10. Fluoride contents of some Nigerian dentifrices.

    Science.gov (United States)

    Ndiokwelu, E; Zohoori, V

    2010-06-01

    To analyze the fluoride content of different brands of toothpastes and powders commercially available in Nigerian markets, to compare the claims of the manufacturers with the objectively obtained results of the analysis and to make recommendations to the Regulatory Agencies based on the results of analysis. Standard Operating Procedures (SOP) were used to measure the concentration of fluoride in randomly selected samples using fluoride ion selective electrode. Of the twelve samples analyzed, two toothpastes were purchased at Newcastle. Ten samples (eight toothpastes and two powders) were brought over from Nigeria. Three of the twelve were found to be deficient in the quantity of fluoride contained. All the deficient three samples found wanting were from Nigeria--a thirty per cent (30%) of the Nigerian samples. The importance of fluoride in caries prevention has been well documented and appreciated as public health measure. All efforts geared towards making fluoride available to the public especially through the dentifrices should be encouraged and guarded against mercantilism and abuse. To this end, the Nigerian Dental Association and the National Agency for Food and Drug Administration and Control (NAFDAC) should increase their surveillance over the quality of the products marketed.

  11. A study on provisional cements, cementation techniques, and their effects on bonding of porcelain laminate veneers.

    Science.gov (United States)

    Vinod Kumar, G; Soorya Poduval, T; Bipin Reddy; Shesha Reddy, P

    2014-03-01

    Minimal tooth preparation is required for porcelain laminate veneers, but interim restorations are a must to protect their teeth against thermal insult, chemical irritation, and to provide aesthetics. Cement remaining after the removal of the provisional restoration can impair the etching quality of the tooth surface and fit and final bonding of the porcelain laminate veneer. This in vitro study examined the tooth surface for remaining debris of cement after removal of a provisional restoration. Determine the presence of cement debris on prepared tooth surface subsequent to the removal of provisional restoration. Determine the cement with the least residue following the cleansing procedures. Determine the effect of smear layer on the amount of residual luting cement. Eighty-four extracted natural anterior teeth were prepared for porcelain laminate veneers. For half of the teeth, the smear layer was removed before luting provisional restorations. Veneer provisional restorations were fabricated and luted to teeth with six bonding methods: varnish combined with glass ionomer cement (GIC), varnish combined with resin modified GIC, varnish, spot etching combined with dual-cure luting cement, adhesive combined with GIC, adhesive combined with resin modified GIC, and adhesive, spot etching combined with dual-cure luting cement. After removal of provisional restorations 1 week later, the tooth surface was examined for residual luting material with SEM. Traces of cement debris were found on all the prepared teeth surfaces for all six groups which were cemented with different methods. Cement debris was seen on teeth subsequent to the removal of provisional's. Dual-cure cement had the least residue following the cleansing procedures. Presence of smear layer had no statistical significance in comparison with cement residue. With the use of adhesive the cement debris was always found to be more than with the use of varnish. GIC showed maximum residual cement followed by dual-cure.

  12. Absence of TAP 2D in Yoruba Nigerians.

    Science.gov (United States)

    Awomoyi, A A; Donn, R P; Davies, E J; Carthy, D; Thomson, W; Ollier, W E

    1995-04-01

    We have characterized TAP allele frequencies in a panel of 71 Yoruba Nigerians using ARMS-PCR. With the exception that TAP 2D was absent in Nigerians, TAP 2 allele frequencies in this population were found to be similar to those in a UK white population. HLA-DR4 also was found to be at a low frequency in Yoruba Nigerians (1.4%). This may reflect the absence of TAP 2D in Nigerians as DR4 and TAP 2D are in linkage disequilibrium in UK Caucasoids. The most frequent TAP 1 allele in Yoruba Nigerians was TAP 1A (49%). However, this value will be an underestimate as TAP1 alleles could not be unequivocally assigned in 41% of subjects using the ARMS-PCR methodology.

  13. Antibacterial activity of selected glass ionomer cements.

    Science.gov (United States)

    Luczaj-Cepowicz, Elżbieta; Marczuk-Kolada, Grażyna; Zalewska, Anna; Pawińska, Małgorzata; Leszczyńska, Katarzyna

    2014-01-22

    The aim of the paper was to determine the antibacterial activity of four glass ionomer cements against bacteria of the genera Streptococcus and Lactobacillus. Four capsulated glass ionomer cements were applied in the study: Fuji Triage (GC), Fuji IX (GC), Ketac Molar (3M Espe) and Ketac Silver (3M Espe). Four standard bacterial strains were used to assess the antibacterial activity of the studied cements: Streptococcus mutans, S. sanguis, S. salivarius and Lactobacillus casei. The antibacterial activity was determined by the agar diffusion method. The bacterial suspension was spread with a cotton swab on TSA plates. For each material six wells (7 mm diameter, 5 mm deep) were made with a cork borer. Each well was then filled with freshly prepared cements. The results were obtained by measuring the bacterial growth inhibition zone after 1, 2, 3 and 7 days. Fuji Triage cement inhibited the growth of all bacterial strains. Fuji IX cement demonstrated the most potent antibacterial activity against S. sanguis. Ketac Molar showed antibacterial activity against S. sanguis and S. salivarius, whereas Ketac Silver was efficient against S. mutans as well. Neither of the Ketac cements inhibited growth of the standard L. casei strain. Antibacterial activity of glass ionomer cements has attracted the interest of scientists in recent years. Most authors, including us, carried out experiments using the agar diffusion method and demonstrated antibacterial activity of glass ionomer cements. Different antibacterial activity of glass ionomer cements, observed in our study and studies of other authors, depended on the evaluated cement, bacterial strain and period of evaluation.

  14. Antibacterial activity of selected glass ionomer cements

    Directory of Open Access Journals (Sweden)

    Elżbieta Łuczaj-Cepowicz

    2014-01-01

    Full Text Available Introduction: The aim of the paper was to determine the antibacterial activity of four glass ionomer cements against bacteria of the genera Streptococcus and Lactobacillus. Material and methods: Four capsulated glass ionomer cements were applied in the study: Fuji Triage (GC, Fuji IX (GC, Ketac Molar (3M Espe and Ketac Silver (3M Espe. Four standard bacterial strains were used to assess the antibacterial activity of the studied cements: Streptococcus mutans, S. sanguis, S. salivarius and Lactobacillus casei. The antibacterial activity was determined by the agar diffusion method. The bacterial suspension was spread with a cotton swab on TSA plates. For each material six wells (7 mm diameter, 5 mm deep were made with a cork borer. Each well was then filled with freshly prepared cements. The results were obtained by measuring the bacterial growth inhibition zone after 1, 2, 3 and 7 days. Results: Fuji Triage cement inhibited the growth of all bacterial strains. Fuji IX cement demonstrated the most potent antibacterial activity against S. sanguis. Ketac Molar showed antibacterial activity against S. sanguis and S. salivarius, whereas Ketac Silver was efficient against S. mutans as well. Neither of the Ketac cements inhibited growth of the standard L. casei strain. Discussion: Antibacterial activity of glass ionomer cements has attracted the interest of scientists in recent years. Most authors, including us, carried out experiments using the agar diffusion method and demonstrated antibacterial activity of glass ionomer cements. Different antibacterial activity of glass ionomer cements, observed in our study and studies of other authors, depended on the evaluated cement, bacterial strain and period of evaluation.

  15. Antibacterial activity of selected glass ionomer cements

    Directory of Open Access Journals (Sweden)

    Elżbieta Łuczaj-Cepowicz

    2014-01-01

    Full Text Available Introduction: The aim of the paper was to determine the antibacterial activity of four glass ionomer cements against bacteria of the genera Streptococcus and Lactobacillus.Material and methods: Four capsulated glass ionomer cements were applied in the study: Fuji Triage (GC, Fuji IX (GC, Ketac Molar (3M Espe and Ketac Silver (3M Espe. Four standard bacterial strains were used to assess the antibacterial activity of the studied cements: Streptococcus mutans, S. sanguis, S. salivarius and Lactobacillus casei. The antibacterial activity was determined by the agar diffusion method. The bacterial suspension was spread with a cotton swab on TSA plates. For each material six wells (7 mm diameter, 5 mm deep were made with a cork borer. Each well was then filled with freshly prepared cements. The results were obtained by measuring the bacterial growth inhibition zone after 1, 2, 3 and 7 days. Results: Fuji Triage cement inhibited the growth of all bacterial strains. Fuji IX cement demonstrated the most potent antibacterial activity against S. sanguis. Ketac Molar showed antibacterial activity against S. sanguis and S. salivarius, whereas Ketac Silver was efficient against S. mutans as well. Neither of the Ketac cements inhibited growth of the standard L. casei strain. Discussion: Antibacterial activity of glass ionomer cements has attracted the interest of scientists in recent years. Most authors, including us, carried out experiments using the agar diffusion method and demonstrated antibacterial activity of glass ionomer cements. Different antibacterial activity of glass ionomer cements, observed in our study and studies of other authors, depended on the evaluated cement, bacterial strain and period of evaluation.

  16. Microscopic evaluation regarding time behavior of orthodontic cements used for disjunctor cementing

    Directory of Open Access Journals (Sweden)

    Ruxandra Bartok

    2015-11-01

    Full Text Available In order to fulfill their function, orthodontic devices must be cemented on teeth using orthodontic rings. The retention of the orthodontic ring is influenced mainly by the type of dental-ring adhesion. This study was initiated to determine possible microleakage events while using zinc phosphate cement Adhesor (Spofa Dental, conventional glass ionomer Ketac Cem (3M ESPE and Fuji Ortho (GC and a compomer Transbond Plus (3M Unitek. The results of the study are consistent with those reported in the literature reference, the compomer is the preferred adhesive material for cementing the orthodontic rings, compared to conventional glass ionomer cements and zinc-phosphate cement.

  17. The effects of complex glyoxal based modifiers on properties of cement paste and hardened cement paste

    Science.gov (United States)

    Simakova, A.; Kudyakov, A.; Efremova, V.; Latypov, A.

    2017-01-01

    This paper presents the results of research on the effect of organic and glyoxal containing additives on the properties of cement paste and hardened cement paste. Complex modifying additives based on liquid glyoxal increasing the strength of the cement paste by 35-63% were developed. Physico-chemical investigations showed that hardened cement paste modified by polylactic acid with glyoxal has a homogeneous and fine-grained structure. Developed complex modifying additives containing glyoxal are approved for use in production technology of heavy cement concretes with advanced properties.

  18. Influence of technique and manipulation on self-adhesive resin cements used to cement intraradicular posts.

    Science.gov (United States)

    Shiratori, Fábio Kenji; Valle, Accácio Lins do; Pegoraro, Thiago Amadei; Carvalho, Ricardo Marins; Pereira, Jefferson Ricardo

    2013-07-01

    Resin cements are widely used to cement intraradicular posts, but bond strength is significantly influenced by the technique and material used for cementation. The purpose of this study was to evaluate the bond strength of 3 self-adhesive cements used to cement intraradicular glass fiber posts. The cements all required different application and handling techniques. Forty-five human maxillary canines were selected and randomly divided into 3 groups n= 15 by drawing lots: Group BIS - Biscem, Group BRE - Breeze, and Group MAX - Maxcem. Each group was divided into 3 subgroups according to application and handling techniques: Sub-group A - Automix/Point tip applicator, Sub-group L - Handmix/Lentulo, and Sub-group C - Handmix/Centrix. Cementation of the posts was performed according to the manufacturers' instructions. The push-out test was performed with a crosshead speed of 0.5 mm/min, and bond strength was expressed in megapascals. The results were evaluated by 2-way ANOVA and the all pairwise multiple comparison procedures (Tukey test) (α=.05). Breeze cement showed the highest average for the subgroups A, L, and C when compared to the Biscem cement and Maxcem Elite (Pinfluence the bond strength of different self-adhesive cements when used for intraradicular post cementation. Copyright © 2013 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved.

  19. The influence of cement type and temperature on chloride binding in cement paste

    DEFF Research Database (Denmark)

    Jensen, Ole Mejlhede; Korzen, Migge Sofie Hoffmann; Skibsted, Jørgen

    1998-01-01

    This paper describes effects of cement type and temperature on chloride binding in cement paste, which is an important subject in relation to life-time modelling of reinforced concrete structures. The influence of cement type on chloride binding is investigated by substituting cement with pure...... cement clinker. Both theoretical considerations and experimental data for chloride binding in cement pastes are presented. A physico-chemically based model to describe the influence of temperature on physical binding of chloride is presented. Solid-state 27Al and 29Si magic-angle spinning (MAS) nuclear...... magnetic resonance (NMR) spectroscopy has been used for quantification of the anhydrous and hydrated aluminate and silicate phases in the chloride exposed cement pastes. The 27Al isotropic chemical shift and nuclear quadrupole coupling is reported for a synthetic sample of Friedel's salt, Ca2Al(OH)6Cl×2H2O....

  20. Feasibility of producing nano cement in a traditional cement factory in Iraq

    Directory of Open Access Journals (Sweden)

    Sada Abdalkhaliq Hasan Alyasri

    2017-12-01

    Full Text Available This study investigates the economic feasibility of producing nano cement through the establishment of a production line within an existing cement factory. Creating a nano cement production line within the Alkufa Cement factory in Iraq is selected as a case study. Evaluation measures including internal rate of return (IRR, net present value (NPV and breakeven point (BEP are used to evaluate the possible gain that can be achieved from this option. The results demonstrated a positive NPV. The IRR is found to be 26.8% and BEP is reached within 3 years after the establishment of the line. This indicates that producing nano cement in the existing cement factory is economically feasible and can be more advantageous than the ordinary cement.

  1. Basic Chemistry for the Cement Industry.

    Science.gov (United States)

    Turner, Mason

    This combined student workbook and instructor's guide contains nine units for inplant classes on basic chemistry for employees in the cement industry. The nine units cover the following topics: chemical basics; measurement; history of cement; atoms; bonding and chemical formulas; solids, liquids, and gases; chemistry of Portland cement…

  2. Investigation of a Hardened Cement Paste Grout

    DEFF Research Database (Denmark)

    Esteves, Luis Pedro; Sørensen, Eigil Verner

    This report documents a series of tests performed on a hardened cement paste grout delivered by the client, Det Norske Veritas A/S.......This report documents a series of tests performed on a hardened cement paste grout delivered by the client, Det Norske Veritas A/S....

  3. Chloride ingress in cement paste and mortar

    DEFF Research Database (Denmark)

    Jensen, Ole Mejlhede; Hansen, Per Freiesleben; Coats, Alison M.

    1999-01-01

    In this paper chloride ingress in cement paste and mortar is followed by electron probe microanalysis. The influence of several paste and exposure parameters on chloride ingress are examined (e.g., water-cement ratio, silica fume addition, exposure time, and temperature), The measurements...

  4. Controls on Cementation in a Chalk Reservoir

    DEFF Research Database (Denmark)

    Meireles, Leonardo Teixeira Pinto; Hussein, A.; Welch, M.J.

    In this study, we identify different controls on cementation in a chalk reservoir. Biot’s coefficient, a measure of cementation, stiffness and strength in porous rocks, is calculated from logging data (bulk density and sonic Pwave velocity). We show that Biot’s coefficient is correlated to the wa...

  5. TECHNOLOGICAL CHANGES IN THE CEMENT MANUFACTURING INDUSTRY.

    Science.gov (United States)

    WESSON, CARL E.

    THE PURPOSE OF THIS STUDY IS TO PRESENT A PRELIMINARY PICTURE OF OCCUPATIONAL CHANGES BROUGHT ABOUT IN THE MANUFACTURE OF CEMENT AS A RESULT OF INTRODUCING AUTOMATED EQUIPMENT. ONE AUTOMATED AND SEVERAL CONVENTIONAL TYPE CEMENT PLANTS WERE STUDIED. ANALYSIS OF DATA OBTAINED THROUGH RESEARCH AND DATA COLLECTED DURING THE STUDY REVEALED THAT…

  6. Cementing liners through deep high pressure ones

    Energy Technology Data Exchange (ETDEWEB)

    Mahony, B.J.; Barrios, J.R.

    1974-03-01

    Entry of gas into the liner-hole annulus during and after cementing liners though deep high pressure zones, generally results in a gas cut cement column from depth of gas entry to top of liner. Prior to undertaking design of liner cementation, it is necessary to know fracture pressure limits of the formations. It is also necessary to know the formation pore pressure or the pressure required to hold gas in the formation and precisely the depth of formation from which gas emerges. This knowledge may be gained from a study of formation pressure gradients of nearby wells or from sonic log analysis of the interval being readied for cementation. Both single-stage and 2-stage techniques are used to solve liner cementing problems in these high pressure zones. An example sets out conditions which are more or less typical and demonstrates how the problem may be considered and solved.

  7. CO2 Capture by Cement Raw Meal

    DEFF Research Database (Denmark)

    Pathi, Sharat Kumar; Lin, Weigang; Illerup, Jytte Boll

    2013-01-01

    The cement industry is one of the major sources of CO2 emissions and is likely to contribute to further increases in the near future. The carbonate looping process has the potential to capture CO2 emissions from the cement industry, in which raw meal for cement production could be used...... as the sorbent. Cyclic experiments were carried out in a TGA apparatus using industrial cement raw meal and synthetic raw meal as sorbents, with limestone as the reference. The results show that the CO2 capture capacities of the cement raw meal and the synthetic raw meal are comparable to those of pure limestone....... The CO2 capture capacity of limestone in the raw meal is lower than for pure limestone. The difference in the CO2 capture capacity decreases with an increase in cycle number. The calcination conditions and composition are major factors that influence the CO2 capture capacity of limestone. At 850 °C in N2...

  8. Shrinkage Properties of Cement Stabilized Gravel

    DEFF Research Database (Denmark)

    Lund, Mia Schou Møller; Hansen, Kurt Kielsgaard

    2014-01-01

    Cement stabilized gravel is an attractive material in road construction because its strength prop-erties are accommodating the increasingly higher requirements to the bearing capacity of a base course. However, reflection cracking of cement stabilized gravel is a major concern. In this pa......-per the shrinkage properties of cement stabilized gravel have been documented under various temperature and relative humidity conditions. Two cement contents corresponding to a 28-days compressive strength of 6.2 MPa and 12.3 MPa have been tested and compared. It is found that the coefficient of linear expansion...... for the two cement contents is 9.9 × 10-6 ⁰C-1 and 11.3 × 10-6 ⁰C-1, respectively. Furthermore, it is found that reflecting cracking can mainly be explained by temperature dependent shrinkage rather than moisture dependent shrinkage....

  9. THE GLASS IONOMER CEMENT IN DENTISTRY

    Directory of Open Access Journals (Sweden)

    Ian Matos Vieira

    2006-08-01

    Full Text Available The glass ionomer cement was developed in the past century 70s, after continuous researches about silicate cement. Over the years, glass ionomers have been playing an important role on restorative dentistry. Initially, the material was used for restoration of small cavities, however, its usage has been increased. The main indications at present are: as core buildup restorative, luting cement, liner and base and as a sealant. Recently, glass ionomer cement has been used for ART restorations and in some medicine fields because of the positive biointeraction with bone cells. Although glass ionomer cements exhibit an initial critical solubility and poor aesthetics, great biological properties like fluoride release to oral environment, chemical bonding to tooth tissues and biocompatibility leads this material elective for many purposes. Finally, their inherent antimicrobial properties contributes to the treatment of many situations in dentistry.

  10. A report of heat stroke in two Nigerian siblings | Asani | Nigerian ...

    African Journals Online (AJOL)

    Infants and children are at higher risk of heat stroke for several reasons. We report these cases to highlight the danger of leaving children unsupervised in vehicles, aid prompt diagnosis, and management of heat stroke. Two Nigerian siblings aged ranges 5 and 3 years old, were trapped inside an unlocked vehicle and ...

  11. Modern Nigerian Art: Art Pricing and the Nigerian Economy, 1960 to ...

    African Journals Online (AJOL)

    The development impacted positively on the living standard of the Nigerian artist, such that artists, both young and old, thrived. This trend contradicted the ... such limitations. Many factors have come to influence the economy and contemporary artistic developments in this direction in Nigeria and this paper considers these.

  12. CONCRETE BASED ON MODIFIED DISPERSE CEMENT SYSTEM

    Directory of Open Access Journals (Sweden)

    D. V. Rudenko

    2016-08-01

    Full Text Available Purpose. The article considers definition of the bond types occurring in a modified cement concrete matrix, and the evaluation of the quality of these links in a non-uniform material to determine the geometrical and physical relationships between the structure and the cement matrix modifiers. Methodology. To achieve this purpose the studies covered the microstructure of dispersed modified concrete cement matrix, the structure formation mechanism of the modified cement concrete system of natural hardening; as well as identification of the methods of sound concrete strength assessment. Findings. The author proposed a model of the spatial structure of the concrete cement matrix, modified by particulate reinforcement crystal hydrates. The initial object of study is a set of volume elements (cells of the cement matrix and the system of the spatial distribution of reinforcing crystallohydrates in these volume elements. It is found that the most dangerous defects such as cracks in the concrete volume during hardening are formed as a result of internal stresses, mainly in the zone of cement matrix-filler contact or in the area bordering with the largest pores of the concrete. Originality. The result of the study is the defined mechanism of the process of formation of the initial strength and stiffness of the modified cement matrix due to the rapid growth of crystallohydrates in the space among the dispersed reinforcing modifier particles. Since the lack of space prevents from the free growth of crystals, the latter cross-penetrate, forming a dense structure, which contributes to the growth of strength. Practical value. Dispersed modifying cement matrix provides a durable concrete for special purposes with the design performance characteristics. The developed technology of dispersed cement system modification, the defined features of its structure formation mechanism and the use of congruence principle for the complex of technological impacts of physical

  13. Dentin-cement Interfacial Interaction

    Science.gov (United States)

    Atmeh, A.R.; Chong, E.Z.; Richard, G.; Festy, F.; Watson, T.F.

    2012-01-01

    The interfacial properties of a new calcium-silicate-based coronal restorative material (Biodentine™) and a glass-ionomer cement (GIC) with dentin have been studied by confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), micro-Raman spectroscopy, and two-photon auto-fluorescence and second-harmonic-generation (SHG) imaging. Results indicate the formation of tag-like structures alongside an interfacial layer called the “mineral infiltration zone”, where the alkaline caustic effect of the calcium silicate cement’s hydration products degrades the collagenous component of the interfacial dentin. This degradation leads to the formation of a porous structure which facilitates the permeation of high concentrations of Ca2+, OH-, and CO32- ions, leading to increased mineralization in this region. Comparison of the dentin-restorative interfaces shows that there is a dentin-mineral infiltration with the Biodentine, whereas polyacrylic and tartaric acids and their salts characterize the penetration of the GIC. A new type of interfacial interaction, “the mineral infiltration zone”, is suggested for these calcium-silicate-based cements. PMID:22436906

  14. Pack cementation coatings for alloys

    Energy Technology Data Exchange (ETDEWEB)

    He, Yi-Rong; Zheng, Minhui; Rapp, R.A. [Ohio State Univ., Columbus, OH (United States)

    1996-08-01

    The halide-activated pack cementation process was modified to produce a Ge-doped silicide diffusion coating on a Cr-Cr{sub 2}Nb alloy in a single processing step. The morphology and composition of the coating depended both on the composition of the pack and on the composition and microstructure of the substrate. Higher Ge content in the pack suppressed the formation of CrSi{sub 2} and reduced the growth kinetics of the coating. Ge was not homogeneously distributed in the coatings. In cyclic and isothermal oxidation in air at 700 and 1050{degrees}C, the Ge-doped silicide coating protected the Cr-Nb alloys from significant oxidation by the formation of a Ge-doped silica film. The codeposition and diffusion of aluminum and chromium into low alloy steel have been achieved using elemental Al and Cr powders and a two-step pack cementation process. Sequential process treatments at 925{degrees}C and 1150{degrees}C yield dense and uniform ferrite coatings, whose compositions are close to either Fe{sub 3}Al or else FeAl plus a lower Cr content, when processed under different conditions. The higher content of Al in the coatings was predicted by thermodynamic calculations of equilibrium in the gas phase. The effect of the particle size of the metal powders on the surface composition of the coating has been studied for various combinations of Al and Cr powders.

  15. Bond strength and cement-tooth interfacial characterization of self-adhesive composite cements.

    Science.gov (United States)

    Temel, U Burak; Van Ende, Annelies; Van Meerbeek, Bart; Ermis, R Banu

    2017-08-01

    (1) To determine the microtensile bond strength (µTBS) of self-adhesive (SA) composite cements to unetched/etched enamel and dentin, and (2) to characterize the cements' interaction with tooth tissue. 51 composite blocks were bonded to smear layer-covered enamel and dentin (three teeth per group). Four SA composite cements (Clearfil SA, G-CEM, RelyX Unicem, SmartCem2), and three multi-step composite cements, two used following an etch-and-rinse (E&R) approach (RelyX ARC, Variolink II 'E&R') and one used following a self-etch (SE) approach (Variolink II ' SE') were investigated. The cement-tooth specimens were perpendicularly sectioned into micro-specimens (1.0 × 1.0 mm) in order to measure the µTBS. The data were statistically analyzed by ANOVA followed by Tukey HSD (Pcomposite cements were applied to dentin free of a smear layer, regular and long resin tags were formed. No significant differences in bonding effectiveness were recorded for the self-adhesive composite cements when bonded to unetched/etched enamel and to dentin. Multi-step etch-and-rinse composite cements showed a better bonding effectiveness to enamel, although this could be approximated by the self-adhesive composite cements when enamel was acid-etched beforehand. On dentin, however, the bond strength of the etch-and-rinse composite cement RelyX ARC was superior.

  16. Microscale Investigation of Arsenic Distribution and Species in Cement Product from Cement Kiln Coprocessing Wastes

    Directory of Open Access Journals (Sweden)

    Yufei Yang

    2013-01-01

    Full Text Available To improve the understanding of the immobilization mechanism and the leaching risk of Arsenic (As in the cement product from coprocessing wastes using cement kiln, distribution and species of As in cement product were determined by microscale investigation methods, including electron probe microanalysis (EPMA and X-ray absorption spectroscopy. In this study, sodium arsenate crystals (Na3AsO412H2O were mixed with cement production raw materials and calcined to produce cement clinker. Then, clinker was mixed water to prepare cement paste. EPMA results showed that As was generally distributed throughout the cement paste. As content in calcium silicate hydrates gel (C-S-H was in low level, but higher than that in other cement mineral phases. This means that most of As is expected to form some compounds that disperse on the surfaces of cement mineral phases. Linear combination fitting (LCF of the X-ray absorption near edge structure spectra revealed that As in the cement paste was predominantly As(V and mainly existed as Mg3(AsO42, Ca3(AsO42, and Na2HAsO4.

  17. Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries

    KAUST Repository

    Nair, Sriramya D.

    2017-10-02

    There has been growing interest in the use of magnetorheological fluids to improve displacement efficiency of fluids (drilling fluids, spacer fluids, cement slurries) in the eccentric casing annuli. When magnetic particles are mixed with the cement slurry for improved displacement, they provide an excellent opportunity for sensing the presence and quality of cement in the annulus. This work focuses on using sophisticated 3D computational electromagnetics to simulate the use of a magnetic cement slurry for well cement monitoring. The main goal is to develop a new tool, which is capable of locating magnetic cement slurry that is placed behind a stainless steel casing. An electromagnetic coil was used to generate a magnetic field inside the borehole. It was found that when a current was passed through the electric coils, magnetic field lines passed through the stainless steel casing, the cement annulus and the rock formation. Three sensors were placed inside the cased borehole and the magnetic field strength variations were observed at these locations. Various factors that have a significant influence on zonal isolation were considered. These include, effect of debonding between casing and cement annulus, effect of changing annuli thickness, influence of a fracture in the rock formation, effect of changing magnetic permeability of cement and finally influence of annuli eccentricity. Based on the results shown in the paper along with the next generation of supersensitive magnetic sensors that are being developed, the magnetic approach appears to be a viable alternative for evaluating the quality of the cement annulus to ensure good zonal isolation.

  18. Parameters of Alumina Cement and Portland Cement with Addition of Chalcedonite Meal

    Science.gov (United States)

    Kotwa, Anna

    2017-10-01

    Aluminous cement is a quick binder with special properties. It is used primarily to make non-standard monolithic components exposed to high temperatures, + 1300°C. It is also a component of adhesives and mortars. It has a very short setting time. It is characterized by rapid increase in mechanical strength and resistance to aggressive sulphates. It can be used in reinforced concrete structures. Laying of concrete, construction mortar made of alumina cement can be carried out even at temperatures of -10°C. This article discusses a comparison of the parameters of hardened mortar made of alumina cement GÓRKAL 40 and Portland cement CEM I 42.5R. The mortars contain an addition of chalcedonite meal with pozzolanic properties, with particle size of less than 0.063μm. The meal was added in amounts of 5% and 20% of cement weight. Chalcedonite meal used in the laboratory research is waste material, resulting from chalcedonite aggregate mining. It has the same properties as the rock from which it originates. We have compared the parameters of hardened mortar i.e. compressive strength, water absorption and capillarity. The addition of 20% chalcedonite meal to mortars made from aluminous cement will decrease durability by 6.1% relative to aluminous cement mortar without addition of meal. Considering the results obtained during the absorbency tests, it can be stated that the addition of chalcedonite meal reduces weight gains in mortars made with cement CEM I 42.5 R and alumina cement. Use of alumina cement without addition of meal in mortars causes an increase of mass by 248% compared to Portland cement mortars without additions, in the absorption tests. The addition of chalcedonite meal did not cause increased weight gain in the capillary action tests. For the alumina cement mortars, a lesser weight gains of 24.7% was reported, compared to the Portland cement mortar after 28 days of maturing.

  19. 21 CFR 888.3027 - Polymethylmethacrylate (PMMA) bone cement.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Polymethylmethacrylate (PMMA) bone cement. 888... Polymethylmethacrylate (PMMA) bone cement. (a) Identification. Polymethylmethacrylate (PMMA) bone cement is a device...: Polymethylmethacrylate (PMMA) Bone Cement.” [67 FR 46855, July 17, 2002] ...

  20. Effect of Cement Grades on some properties of Sandcrete ...

    African Journals Online (AJOL)

    The purpose of this study is to investigate the effects of cement grade on some properties of sandcrete. The cement used for this work was Ordinary Portland cement (Dangote brand) of grade 42.5 and 32.5 meeting the requirement of ASTM C150 type 1 cement. Three types of fine aggregate was also used to produce ...

  1. Application of TEM to characterize fly ash- and slag cements

    NARCIS (Netherlands)

    Pietersen, H.S.

    1999-01-01

    A Portland fly ash cement containing 20% of a fine fly ash and a blast furnace slag cement of approximately 290 days old were examined with analytical transmission electron microscopy, in order to examine the (local) microstructure in these cements in detail. In the Portland fly ash cement the fly

  2. Dehydration kinetics of Portland cement paste at high temperature

    NARCIS (Netherlands)

    Zhang, Q.; Ye, G.

    2012-01-01

    Portland cement paste is a multiphase compound mainly consisting of calcium-silicate-hydrate (CSH) gel, calcium hydroxide (CH) crystal, and unhydrated cement core. When cement paste is exposed to high temperature, the dehydration of cement paste leads to not only the decline in strength, but also

  3. The use of Limestone Powder as an Alternative Cement Replacement

    African Journals Online (AJOL)

    user

    hardened mortar. ii) Produce Portland limestone cement as an alternative cement type having comparable characteristics to that of OPC and PPC. The study ...... [3] Mc Grath, R. J., The Canadian Cement. Industry and. Innovation. Towards. Sustainable. Development,. Cement. Association of Canada, June 10-13, 2008.

  4. Environmental Assessment of Different Cement Manufacturing ...

    Science.gov (United States)

    Due to its high environmental impact and energy intensive production, the cement industry needs to adopt more energy efficient technologies to reduce its demand for fossil fuels and impact on the environment. Bearing in mind that cement is the most widely used material for housing and modern infrastructure, the aim of this paper is to analyse the Emergy and Ecological Footprint of different cement manufacturing processes for a particular cement plant. There are several mitigation measures that can be incorporated in the cement manufacturing process to reduce the demand for fossil fuels and consequently reduce the CO2 emissions. The mitigation measures considered in this paper were the use of alternative fuels and a more energy efficient kiln process. In order to estimate the sustainability effect of the aforementioned measures, Emergy and Ecological Footprint were calculated for four different scenarios. The results show that Emergy, due to the high input mass of raw material needed for clinker production, stays at about the same level. However, for the Ecological Footprint, the results show that by combining the use of alternative fuels together with a more energy efficient kiln process, the environmental impact of the cement manufacturing process can be lowered. The research paper presents an analysis of the sustainability of cement production , a major contributor to carbon emissions, with respect to using alternative fuels and a more efficient kiln. It show

  5. Tooth surface treatment strategies for adhesive cementation.

    Science.gov (United States)

    Rohr, Nadja; Fischer, Jens

    2017-04-01

    The aim of this study was to evaluate the effect of tooth surface pre-treatment steps on shear bond strength, which is essential for understanding the adhesive cementation process. Shear bond strengths of different cements with various tooth surface treatments (none, etching, priming, or etching and priming) on enamel and dentin of human teeth were measured using the Swiss shear test design. Three adhesives (Permaflo DC, Panavia F 2.0, and Panavia V5) and one self-adhesive cement (Panavia SA plus) were included in this study. The interface of the cement and the tooth surface with the different pre-treatments was analyzed using SEM. pH values of the cements and primers were measured. The highest bond strength values for all cements were achieved with etching and primer on enamel (25.6 ± 5.3 - 32.3 ± 10.4 MPa). On dentin, etching and priming produced the highest bond strength values for all cements (8.6 ± 2.9 - 11.7 ± 3.5 MPa) except for Panavia V5, which achieved significantly higher bond strengths when pre-treated with primer only (15.3 ± 4.1 MPa). Shear bond strength values were correlated with the micro-retentive surface topography of enamel and the tag length on dentin except for Panavia V5, which revealed the highest bond strength with primer application only without etching, resulting in short but sturdy tags. The highest bond strength can be achieved for Panavia F 2.0, Permaflo DC, and Panavia SA plus when the tooth substrate is previously etched and the respective primer is applied. The new cement Panavia V5 displayed low technique-sensitivity and attained significantly higher adhesion of all tested cements to dentin when only primer was applied.

  6. Somatotypes of Nigerian athletes of several sports.

    Science.gov (United States)

    Mathur, D N; Toriola, A L; Igbokwe, N U

    1985-01-01

    Somatotype ratings and percentage body fat of 131 elite Nigerian male athletes, average 24.2 years of age, and belonging to badminton (n = 18), basketball (n = 30), field hockey (n = 24), handball (n = 16), judo (n = 18), and soccer (n = 25) teams were determined. Basketball, handball and soccer players were taller and heavier, and had low percent fat values as compared with the other athletic groups. Judokas and hockey players were endomesomorphs. Other sports groups were predominantly ectomesomorphs. Images p219-a p219-b p219-c PMID:4092144

  7. CHEMICAL ANALYSIS OF SOME NIGERIAN GYPSUM AND ...

    African Journals Online (AJOL)

    X-ray fluorescence analyzer (XRF) was employed in the analysis of some local and imported stocks of gypsum and limestone utilized by a leading cement manufacturing industry in Nigeria. In addition, the recycled dust standard reference samples were also analyzed along with the raw materials in question. The gypsum ...

  8. Synthesis of pure Portland cement phases

    DEFF Research Database (Denmark)

    Wesselsky, Andreas; Jensen, Ole Mejlhede

    2009-01-01

    Pure phases commonly found in Portland cement clinkers are often used to test cement hydration behaviour in simplified experimental conditions. The synthesis of these phases is covered in this paper, starting with a description of phase relations and possible polymorphs of the four main phases...... in Portland cement, i.e. tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium alumino ferrite. Details of the The process of solid state synthesis are is described in general including practical advice on equipment and techniques. Finally In addition, some exemplary mix compositions...

  9. Effect of cementing technique and cement type on thermal necrosis in hip resurfacing arthroplasty - a numerical study

    NARCIS (Netherlands)

    Janssen, D.; Srinivasan, P.; Scheerlinck, T.; Verdonschot, Nicolaas Jacobus Joseph

    2012-01-01

    Femoral fractures within resurfacing implants have been associated with bone necrosis, possibly resulting from heat generated by cement polymerization. The amount of heat generated depends on cement mantle volume and type of cement. Using finite element analysis, the effect of cement type and volume

  10. Effect of cementing technique and cement type on thermal necrosis in hip resurfacing arthroplasty--a numerical study.

    NARCIS (Netherlands)

    Janssen, D.W.; Srinivasan, P.; Scheerlinck, T.; Verdonschot, N.J.

    2012-01-01

    Femoral fractures within resurfacing implants have been associated with bone necrosis, possibly resulting from heat generated by cement polymerization. The amount of heat generated depends on cement mantle volume and type of cement. Using finite element analysis, the effect of cement type and volume

  11. High-Strain-Rate behavior of Hydrated Cement Paste.

    Science.gov (United States)

    1987-01-29

    failure of cement mortars and concrete under dynamic loading conditions. The present research program, a collaborative effort of Martin Marietta...cement mortars and concrete. %0 -1- • ° ° . • .%° S, During the first part of 1986, work at Martin Marietta Laboratories was focused on establishing the...totally replaced by the more economical blended cements ( flyash and slag- cements). However, we obtained a limited quantity of Type IV cement (LTS series

  12. INFLUENCE OF WINE ACID ON RHEOLOGICAL PROPERTIES OF WELL BORE CEMENT SLURRIES AND HARDENED CEMENT PROPERTIES

    Directory of Open Access Journals (Sweden)

    Nediljka Gaurina-Međimurec

    1989-12-01

    Full Text Available Adaptation of commercial types of domestic cements for use in cementing the deep wells is a process by which Yugoslav oil industry tends to solve problems of completion of those wells independently. In order to design a domestic, cheep and effective retarder, tests of applicability of wine acid on cement slurries have been carried out. Besides examining the necessary wine acid content to achieve desirable Theological properties, the influence of this additive on properties of hardened cement samples has been tested too (the paper is published in Croatian.

  13. Millennium Development Goals and the Nigerian Stock Exchange ...

    African Journals Online (AJOL)

    The paper examines the relationship between the Millennium Development Goals and the Nigerian Stock Exchange. It highlighted the significance of having a robust business community (private sector), which is paramount in achieving sustainable national development and the MDGs.

  14. 25 original article hematological derangement patterns in nigerian ...

    African Journals Online (AJOL)

    boaz

    HEMATOLOGICAL DERANGEMENT PATTERNS IN NIGERIAN DOGS INFECTED. WITH TRYPANOSOMA BRUCEI: A SIMPLE PROTOTYPE FOR ASSESSING. TOLERANCE TO TRYPANOSOME INFECTIONS IN ANIMALS. Abenga, J. N., Ode, S. A. and Agishi, G. Department of Veterinary Pathology and Microbiology, ...

  15. Nigerian Hospital Practice - Vol 10, No 3-4 (2012)

    African Journals Online (AJOL)

    Model stature estimation formula and weight prediction for adult Nigerians based on ulna bone length · EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. OU Ogbeide, FAE Om'Iniabohs, 36-41 ...

  16. Sleep health of healthcare workers in Kano, Nigeria | Kolo | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Practice. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 20, No 4 (2017) >. Log in or Register to get access to full text downloads.

  17. Trypanosomiasis in Rams in Kaduna State Nigeria | Bizi | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Parasitology. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 34, No 2 (2013) >. Log in or Register to get access to full text downloads.

  18. Nigerian Journal of Clinical Practice - Vol 8, No 1 (2005)

    African Journals Online (AJOL)

    Co–Morbid Psychiatric Disorders Nigerian Patients Suffering Temporomandibular Joint Pain And Dysfunction · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. BDO Saheeb, AN Otakpor, 23-28 ...

  19. Enhancement of protein in Cassava (in vitro) | Eruvbetine | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Animal Science. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 1, No 2 (1999) >. Log in or Register to get access to full text downloads.

  20. Nigerian Veterinary Journal - Vol 27, No 1 (2005)

    African Journals Online (AJOL)

    Concept and prospects of computer aided diagnosis (CADx) for Nigerian veterinarians · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. YA Geidam, AU Mani, HI Musa, 23-31 ...

  1. Fuzzification of Botulism. | Imianvan | Journal of the Nigerian ...

    African Journals Online (AJOL)

    Journal of the Nigerian Association of Mathematical Physics. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 30 (2015) >. Log in or Register to get access to full text downloads.

  2. Rare craniofacial clefts in Ibadan | Iyun | Nigerian Journal of Plastic ...

    African Journals Online (AJOL)

    Nigerian Journal of Plastic Surgery. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 8, No 2 (2012) >. Log in or Register to get access to full text downloads.

  3. Vacuum assisted closure of wounds – A review | Salati | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Plastic Surgery. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 6, No 1 (2010) >. Log in or Register to get access to full text downloads.

  4. A Case Report of Congenital Neuroblastoma | Olutekunbi | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Medicine. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 4, No 3 (2012) >. Log in or Register to get access to full text downloads.

  5. Another Look at the “Abdominal Cocoon” | Ibrahim | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Medicine. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 3, No 2 (2010) >. Log in or Register to get access to full text downloads.

  6. Abandonment Of A Neonate With Natal Tooth | Oyapero | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Medicine. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 6, No 1 (2014) >. Log in or Register to get access to full text downloads.

  7. Drug prescription pattern in a Nigerian teaching hospital ...

    African Journals Online (AJOL)

    Nigerian Journal of Clinical Medicine. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 8, No 1 (2016) >. Log in or Register to get access to full text downloads.

  8. Nigerian Journal of Family Practice - Vol 3, No 1 (2012)

    African Journals Online (AJOL)

    Teaching Family Medicine in Medical Schools - The Perspective from a Nigerian Medical School. EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. IB Okokon, UK Ogbonna, UE Asibong, TM Aluka, PO Dienye, 1-6 ...

  9. Perceived impact of terrorism on Nigerian youths and society

    National Research Council Canada - National Science Library

    Akinsola, Esther F; Ojo, Adebusola

    2015-01-01

    Terrorism is a hydra-headed global phenomenon but it has recently become a recurring menace in Nigeria, unleashing trauma, fear and psychological disorientation on individuals and the Nigerian society...

  10. Esan women, agriculture and colonial rule | Osagie | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Economic History. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 3 (2000) >. Log in or Register to get access to full text downloads.

  11. Editorial | Lesi | Nigerian Journal of Gastroenterology and Hepatology

    African Journals Online (AJOL)

    Nigerian Journal of Gastroenterology and Hepatology. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 7, No 1 (2015) >. Log in or Register to get access to full text downloads.

  12. Editorial | Lesi | Nigerian Journal of Gastroenterology and Hepatology

    African Journals Online (AJOL)

    Nigerian Journal of Gastroenterology and Hepatology. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 8, No 1 (2016) >. Log in or Register to get access to full text downloads.

  13. Osler-Weber-Rendu syndrome: Case report | Akintayo | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Gastroenterology and Hepatology. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 7, No 1 (2015) >. Log in or Register to get access to full text downloads.

  14. Improvement in Animal Production: Animal Health | Sansi | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Animal Production. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 2, No 1 (1975) >. Log in or Register to get access to full text downloads.

  15. Perception of alcohol availability, promotion and policy by Nigerian ...

    African Journals Online (AJOL)

    MAMPA) project conducted in Nigeria and three other countries in Africa, a survey of Nigerian students was conducted to assess their perceptions of alcohol promotion and policy in the country. Nearly five hundred students drawn from five faculties ...

  16. Calculation of the structure factor of liquid metals | Osiele | Nigerian ...

    African Journals Online (AJOL)

    Nigerian Journal of Physics. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 18, No 1 (2006) >. Log in or Register to get access to full text downloads.

  17. The future of mobile learning in the Nigerian education system

    CSIR Research Space (South Africa)

    Adedoja, G

    2012-05-01

    Full Text Available perfect vehicle for making educational opportunities accessible to students in places and times that are more convenient than formal schooling, focusing on the Nigerian context. We conducted a study to investigate the extent to which students...

  18. Nigerian Journal of Guidance and Counselling: Editorial Policies

    African Journals Online (AJOL)

    Focus and Scope. The Nigerian Journal of Guidance and Counselling publishes articles directed to the common interest of counsellors, psychologists, educators and personnel workers in schools, colleges, universities, community agencies and government. Especially welcome are stimulating research study reports.

  19. Animals in Medical Research | Kadima | Nigerian Journal of Surgical ...

    African Journals Online (AJOL)

    Nigerian Journal of Surgical Research. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 2, No 2 (2000) >. Log in or Register to get access to full text downloads.

  20. Indigenous Knowledge Systems and Leadership Styles in Nigerian Work Organisations

    Directory of Open Access Journals (Sweden)

    Osarumwense Iguisi

    2014-11-01

    Full Text Available This research project investigated four managerial leadership styles in Nigerian organizations. The research question that the research tries to address is: to what extent are the leadership styles expressed in modern management theories consistent with Nigerian Traditional values? The findings do confirm that the perceived leadership style in the organizations by the managers is autocratic, the preferred style is the paternalistic and the rejected is the autocratic. For about one in five Nigerian managers, the democratic style is the most often rejected. The study challenges the validity of dominant Western universal perspectives in managerial leadership in traditional African organizations. The study suggests that elements of traditional values pose serious challenge to Nigerian managers’ ability to adopt traditional and modern management practice that can improve the effectiveness of leadership in their organizations