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Factors Undermining the Investigation of Child Contacts of TB Patients： The Case of FCT, Abuja, Nigeria

Journal of Health Science 2014年第3期2卷 152-156页

作者： Olajumoke Onazi saddiq abdurrahman Emmy Van der Grinten Moses Onazi Enang Oyama Mustapha Gidado Amos Fadare Omoniyi TBCARE I Project M&E Unit Federal Capital Territory Abuja 930283 Nigeria Federal Capital Territory TB and Leprosy Control Program Federal Capital Territory Abuja 930283 Nigeria American Leprosy Missions Aburi M169 Ghana Research and Data Solutions Federal Capital Territory Abuja 930283 Nigeria WHO Office Abuja 930283 Nigeria

Facility records of 320 TB （tuberculosis） patients were examined over a one-year-period; January-December 2009 to ascertain the screening of children under 6 years of age who have had contacts with sputum smear positive TB patients as stipulated in the NTBLCP （National Tuberculosis and Leprosy Control Program） guidelines. In addition, semi-structured questionnaires were administered to 28 DOTS （directly-observed treatment strategy） clinicians to elicit information to help explain findings from the analysis of the routine data. Over 60% of children less than 6 years of age who had contacts with TB patients were not investigated in the health facilities included in the survey. The level of educational attainment of DOTS providers was associated with the screening of TB patients＇ contacts （P = 0.008）. Forgetfulness by clinicians to ask for or screen children of TB patients in the facilities is the singular most important factor undermining contact investigation. The proportion of under 6 years TB contacts screened or not screened for TB in the facilities was similar according to the age and gender of TB patients, and the type of health facilities where treatment was accessed by patients （P = 0.325）. The study underscored the need for the state program to evaluate the quality of service provision as well as counseling provided to TB patients at the facilities.

关键词： Contact investigation children contact tuberculosis TB patients case finding.

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Patients direct costs to undergo TB diagnosis

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Infectious Diseases of Poverty 2016年第1期5卷 221-229页

作者： Rachel M.Anderson de Cuevas Lovett Lawson Najla Al-Sonboli Nasher Al-Aghbari Isabel Arbide Jeevan B.Sherchand Emenyonu E.Nnamdi Abraham Aseffa Mohammed A.Yassin saddiq T.abdurrahman Joshua Obasanya Oladimeji Olanrewaju Daniel Datiko Sally J.Theobald Andrew Ramsay S.Bertel Squire Luis E.Cuevas Liverpool School of Tropical Medicine Pembroke PlaceLiverpool L35QAUK Zankli Medical Center AbujaNigeria Bingham University Nassarawa StateAbujaNigeria Medical Faculty Sana’a UniversitySana’aYemen National Tuberculosis Institute Sana’aYemen Bushullo Major Health Centre AwassaEthiopia Tribhuvan University Institute of Medicine KathmanduNepal Armauer Hansen Research Institute Addis AbabaEthiopia The Global Fund to Fight AIDS Tuberculosis and MalariaGenevaSwitzerland Federal Capital Territory Tuberculosis and Leprosy Control Programme AbujaNigeria Nigeria Tuberculosis and Leprosy Control Programme AbujaNigeria REACH Ethiopia HawassaEthiopia UNICEF/UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases World Health OrganizationGenevaSwitzerland

Background:A major impediment to the treatment of TB is a diagnostic process that requires multiple *** of patient costs associated with diagnosis use different protocols and are not ***:We aimed to describe the direct costs incurred by adults attending TB diagnostic centres in four countries and factors associated with expenditure for *** of 2225 adults attending smear-microscopy centres in Nigeria,Nepal,Ethiopia and ***>18 years with cough>2 weeks were enrolled *** costs were quantified using structured *** with costs>75^(th) quartile were considered to have high expenditure(cases)and compared with patients with costs<75^(th) quartile to identify factors associated with high ***:The most significant expenses were due to clinic fees and *** participants attended the centres with *** expenditure was associated with attending with company,residing in rural areas/other towns and ***:The costs incurred by patients are substantial and share common patterns across *** user fees,transparent charging policies and reimbursing clinic expenses would reduce the poverty-inducing effects of direct diagnostic *** locations with limited resources,support could be prioritised for those most at risk of high expenditure;those who are illiterate,attend the service with company and rural residents.

关键词： Tuberculosis Costs Access to healthcare Ethiopia Nepal Nigeria Yemen

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First-Principles Investigation of Charge Transfer Mechanism of B-Doped 3C-SiC Semiconductor Material

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World Journal of Condensed Matter Physics 2024年第2期14卷 35-44页

作者： Abdullahi Alkali Dauda Muhammad Yusuf Onimisi Adeyemi Joshua Owolabi Hameed Adeneyi Lawal Hassan Muhammad Gambo Bashir Mohammed Aliyu Surajo Bala Muhammad Lamido Madugu Muhammad abdurrahman Nainna Johnson Akinade Bamikole Physics Department Faculty of Science Air Force Institute of Technology Kaduna Nigeria Physics Department Faculty of Science Nigeria Defence Academy Kaduna Nigeria Physics Department Umaru Musa Yar&#8217adua University Batagarawa Nigeria Physics Department Faculty of Science Gombe State University Gombe Nigeria Physics Department Federal University of Lafia Lafia Nigeria

This study delves into the charge transfer mechanism of boron (B)-doped 3C-SiC through first-principles investigations. We explore the effects of B doping on the electronic properties of 3C-SiC, focusing on a 12.5% impurity concentration. Our comprehensive analysis encompasses structural properties, electronic band structures, and charge density distributions. The optimized lattice constant and band gap energy of 3C-SiC were found to be 4.373 Å and 1.36 eV respectively, which is in agreement with previous research (Bui, 2012;Muchiri et al., 2018). Our results show that B doping narrows the band gap, enhances electrical conductivity, and influences charge transfer interactions. The charge density analysis reveals substantial interactions between B dopants and surrounding carbon atoms. This work not only enhances our understanding of the material’s electronic properties, but also highlights the importance of charge density analysis for characterizing charge transfer mechanisms and their implications in the 3C-SiC semiconductors.

关键词： First-Principles Calculations DFT Boron (B)-Doped 3C-SiC Charge Transfer

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Geochemistry and Petrogenesis of Intracontinental Basaltic Volcanism on the Northwest Arabian Plate,Gaziantep Basin,Southeast Anatolia,Turkey

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Acta Geologica Sinica(English Edition) 2018年第2期92卷 519-535页

作者： Sevcan KURUM abdurrahman BOLUCU Melek URAL Department of Geological Engineering University of Ftrat23110 ElazigTurkey Institute of Science and Technology University of Ftrat23110 Elaztg Turkey

Volcanism along the northwest boundary of the Arabian Plate found in the Gaziantep Basin, southeast Turkey, is of Miocene age and is of alkaline and calc-alkaline basic composition. The rare earth element data for both compositional series indicates spinel-peridotite source areas. The rare earth and trace elements of the alkaline lavas originate from a highly primitive and slightiy contaminated asthenospheric mantle; those of the calc-alkaline lavas originate from a highly heterogeneous, asthenospheric, and lithospheric mantle source. Partial melting and magmatic differentiation processes played a role in the formation of the petrological features of these volcanics. These rocks form two groups on the basis of their 87Sr[S6Sr and 143Nd/lI4Nd isotopic compositions in addition to their classifications based on their chemical compositions （alkaline and calc-alkaline）. These isotopic differences indicate a dissimilar parental magma. Therefore, high Nd isotope samples imply a previously formed and highly primitive mantle whereas low Nd isotope samples may indicate comparable partial melting of an enriched heterogeneous shallow mantle. Other isotopic changes that do not conform to the chemical features of these lavas are partly related to the various tectonic events of the region, such as the Dead Sea Fault System and the Bitlis Suture Zone.

关键词： petrography geochemistry isotopes basaltic volcanism Arabian Plate Turkey

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A developed dual-site Langmuir model to represent the high-pressure methane adsorption and thermodynamic parameters in shale

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International Journal of Coal Science & Technology 2023年第5期10卷 21-37页

作者： Ke Hu Qian Zhang Yufei Liu Muhammad abdurrahman Thaika School of Mining and Petroleum Engineering University of AlbertaEdmontonT6G1H9Canada Institute of Energy School of Earth and Space SciencePeking UniversityBeijing100871China

Comprehending the mechanism of methane adsorption in shales is a crucial step towards optimizing the development of deep-buried shale gas. This is because the methane adsorbed in shale represents a significant proportion of the subsurface shale gas resource. To properly characterize the methane adsorption on shale, which exhibits diverse mineral compositions and multi-scale pore sizes, it is crucial to capture the energy heterogeneity of the adsorption sites. In this paper, a dual-site Langmuir model is proposed, which accounts for the temperature and pressure dependence of the density of the adsorbed phase. The model is applied to the isothermals of methane adsorption on shale, at pressures of up to 30 MPa and temperatures ranging from 40 to 100 ℃. The results show that the proposed model can describe the adsorption behavior of methane on shale more accurately than conventional models, which assume a constant value for the density of adsorbed phase. Furthermore, the proposed model can be extrapolated to higher temperatures and pressures. Thermodynamic parameters were analyzed using correctly derived equations. The results indicate that the widely used, but incorrect, equation would underestimate the isosteric heat of adsorption. Neglecting the real gas behavior, volume of the adsorbed phase, and energy heterogeneity of the adsorption sites can lead to overestimation of the isosteric heat of adsorption. Furthermore, the isosteric heat evaluated from excess adsorption data can only be used to make a rough estimate of the real isosteric heat at very low pressure.

关键词： Shale gas Adsorption-Dual-site Langmuir model Energy heterogeneity Isosteric heat

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Influence of proton-skin thickness on the α decays of heavy nuclei

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Chinese Physics C 2018年第1期42卷 122-134页

作者： W.M.Seif A.abdurrahman Cairo University Faculty of Science Department of Physics Giza Egypt Misr University for Science and Technology (MUST) Faculty of Engineering Department of Physics Giza Egypt

We investigate the effect of proton-skin thickness on the α decay process. We consider 188 neutrondeficient nuclei belonging to the isotopic chains from Te（Z = 52） to Pb（Z = 82）. The calculations of the half-life are carried out in the framework of the preformed cluster model, with the Wentzel-Kramers-Brillouin penetration probability and assault frequency. It is shown that the proton-skin thickness（？p） of the daughter nucleus gives rise to a total α-daughter nucleus interaction potential of relatively wide deep internal pocket and a thinner Coulomb barrier of less height. This increases the penetration probability but decreases the assault frequency. The overall impact of the proton-skin thickness appears as a decrease in the decay half-life. The proton-skin thickness decreases the stability of the nucleus. The half-lives of the proton-skinned isotopes along the isotopic chain decrease exponentially with increasing the proton-skin thickness, whereas the Qα-value increases with ？p. α-decay manifests itself as the second favorite decay mode of neutron-deficient nuclei, next to the β＋-decay and before proton-decay. It is indicated as main, competing, and minor decay mode, at 21%, 7%, and 57%, respectively, of the investigated nuclei.

关键词： alpha decay half-life proton-skin thickness branching ratio

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Insulin sensitizers for the treatment of non-alcoholic fatty liver disease

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World Journal of Hepatology 2014年第4期6卷 199-206页

作者： Zeynel Abidin Ozturk abdurrahman Kadayifci Department of Internal Medicine Faculty of MedicineUniversity of Gaziantep Division of Gastroenterology Faculty of MedicineUniversity of Gaziantep Division of Gastroenterology Massachusetts General Hospital

Non-alcoholic fatty liver disease(NAFLD) is the leading cause of liver disease in the Western world and is closely associated with metabolic syndrome,which includes hypertension,central obesity,dyslipidemia and insulin *** includes a wide spectrum of liver alterations,ranging from simple hepatic steatosis to variable degrees of fibrosis,cirrhosis and even hepatocellular *** the etiology and progression of the disorder remain poorly understood,insulin resistance is considered to play a pivotal role in the *** sensitizers such as biguanides,thiazolidinediones(TZDs),glucagon-like peptide-1 receptor agonists and dipeptidyl peptidase 4 inhibitors have been studied as therapeutic approaches for NAFLD in recent *** improves insulin sensitivity and serum alanine transaminase and aspartate transaminase(ALT/AST) levels in the majority of subjects; however,it has no significant effect on liver *** improve insulin sensitivity,serum ALT/ AST levels and histology in some cases,but there are some concerns about the safety of long-term *** of appropriate patients for avoiding side effects and the treatment of underlying disease are themain *** drugs are the best choice for the treatment of NAFLD in patients with type 2 DM who are also candidates for treatment with an insulin *** present review provides an overview of insulin sensitizers in the treatment of NAFLD.

关键词： Insulin sensitizers Metformin Non-alcoholic fatty liver disease Non-alcoholic steatohepatitis Thiazolidinediones

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Stroke and dilated cardiomyopathy associated with celiac disease

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World Journal of Gastroenterology 2010年第18期16卷 2302-2304页

作者： Murat Dogan Erdal Peker Eren Cagan Sinan Akbayram Mehmet Acikgoz Huseyin Caksen abdurrahman Uner Yasar Cesur Department of Pediatric Endocrinology Yuzuncu Yil UniversityMedical School Department of Pediatric Neurology Yuzuncu Yil UniversityMedical School Department of Pediatric Hematology Yuzuncu Yil UniversityMedical School Department of Pediatric Cardiology Yuzuncu Yil UniversityMedical School

Celiac disease(CD) is manifested by a variety of clinical signs and symptoms that may begin either in childhood or adult *** symptoms without signs of malabsorption have been observed for a long time in *** this report,an 8-year-old girl with CD presented with rarely seen dilated cardiomyopathy and *** girl was admitted with left side *** medical history indicated abdominal distention,chronic diarrhea,failure to thrive,and *** physical examination,short stature,pale skin and a grade 2 of 6 systolic murmur were *** strength was 0/5 on the left side,and 5/5 on the right *** examinations were *** for collagen tissue diseases were *** V Leiden and prothrombin GA20210 mutations were *** mass spectrophotometry and blood carnitine profiles were *** magnetic resonance imaging and cerebral angiography showed an infarction area at the basal ganglia *** of serologic markers and intestinal biopsy revealed *** emphasize that in differential diagnosis of ischemic stroke,CD should be kept in mind.

关键词： Celiac disease Stroke Cardiomyopathy Children

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Simple design flow injection PMMA acrylic sample cell for nitrite determination

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Chinese Optics Letters 2014年第4期12卷 79-81页

作者： Faizar abdurrahman Norhana Arsad Sabiran Harry Ramza Department of Electrical Electronic and System Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600UKM-BangiSelangor Darul Ehsan Malaysia

A polymethyl-methacrylate （PMMA） acrylic sample cell using flow injection is developed in this research for the determination of nitrite in an aqueous media. The research focuses on exhibiting direct absorbance spectrophotometry of nitrite using concentration of samples ranging from 0.1078 to 1.725 ppm. Nitrite determination is done colorimetrically using the Greiss reagent method. This method is based on the reaction of nitrite with sulphanilamide acid and N-l-napthylamine （NED） utilizing diazo coupling, and a syringe is used to administer the nitrite solution. The sample cell being used possesses a diameter of 1 mm with an overall size of 7.35×22 mm2. To gauge the direct absorbance, a wavelength range from 400 to 650 nm has been selected for the testing, and the maximum absorbance is found to be at 545 nm. The validity of the proposed cell is explained in this letter.

关键词： cell PMMA flow

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Direct Derivation of the Comma 3-Vertex in the Full String Basis

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Journal of Modern Physics 2019年第10期10卷 1271-1298页

作者： A. abdurrahman M. Gassem Department of Physics Shippensburg University of Pennsylvania Shippensburg PA USA The Division of Mathematics and Science South Texas College McAllen TX USA

The interacting comma 3-vertex for the bosonic open string in the full string basis is derived using the half string overlap relations directly. Thus avoiding the coherent states technique employed in earlier derivations. The resulting form of the interacting 3-vertex turns out to be precisely the desired expression obtained in terms of the full string oscillator modes. This derivation establishes that the comma 3-vertex and Witten’s 3-vertex are identical and therefore are interchangeable.

关键词： String Theory Witten’s Theory Open Bosonic String

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