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Search Results: 1 - 10 of 563338 matches for " A. E. Omonisi "
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Clinico-Pathologic Study of Salivary Gland Disorders at a Sub-Urban Nigerian Tertiary Hospital: A 5 Year Retrospective Review  [PDF]
Obitade S. Obimakinde, Olabamiji A. Olajuyin, Waheed A. Adegbiji, Abidemi E. Omonisi, Christopher O. Ibidun
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2019, DOI: 10.4236/ijohns.2019.83012
Abstract: Background: The spectrum of salivary gland lesions is wide and the relative incidence of neoplastic and non-neoplastic lesions is variable in different studies. Despite the relatively common nature of salivary gland disorders, there is dearth of literature on these lesions, especially in sub-Saharan Africa. We therefore embarked on this study to analyze the differential diagnosis of salivary gland lesions seen and managed at our institution. Methods: A retrospective review of salivary gland disorders that presented at our facility from January 2012 to December 2016 was done. Information on patients’ demographic details, type and location of salivary gland lesion, histologic diagnosis and treatment were retrieved and analyzed with SPSS version 20. Result: A total of 65 patients were treated for salivary gland lesions of various types during the study period. The age of the patients ranged from 3 months to 68 years [mean 33.8 ± 12.3]. Neoplastic lesions [n = 39, 60.0%] were the commonest followed by sialolithiasis [n = 14, 21.5%] while mucous retention/extravasation cysts accounted for 13.9% of the cases. Pleomorphic adenoma was the predominant tumor in this series [87.2%] and the commonest site was the parotid gland [58.8%]. On the contrary submandibular gland appeared to be the commonest site for sialolithiasis [57.1%]. The majority of mucous retention/extravasation cysts occurred in the sublingual gland [55.5%]. Conclusion: Neoplastic lesions remain the commonest salivary gland disorder and pleomorphic adenoma was the most prevalent. Sialolithiasis and mucous cysts are salivary gland lesions with equally wide disease spectrum.
Comparative Study on Nigerian Wild and Edible Beans in Reversing Incidence of Colon Cancer in Albino Rats  [PDF]
O. A. Awoyinka, A. Ileola, C. N. Imeoria, A. E. Omonisi, F. C. Oladele, M. F. Asaolu
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102708
Abstract:
This work is an investigation of the curative effects of some edible and wild type beans on colonic inflammation induced by Dextran Sulphate Sodium (DSS) in wister albino rats. Macroscopic examination performed on the colon after seven-day exposure of the animals to both DSS and bean sample revealed a high incidence of colonic inflammation in rats fed with macuna compared to other groups. However, from the histological examination, the groups fed with Otili and Feregede had a low incidence of dysplasia showing Otili and Feregede to be good candidates that could mitigate effect of Dextran Sodium Sulphate.
Pattern of Upper Gastrointestinal Malignancies as Seen at Endoscopy in Ekiti State University Teaching Hospital, Ado-Ekiti, Nigeria  [PDF]
Akande Oladimeji Ajayi, Ebenezer Adekunle Ajayi, Olusoji Abidemi Solomon, Emmanuel Abidemi Omonisi, Samuel Ayokunle Dada
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102731
Abstract:
Aims and Objective: Gastrointestinal malignancies are among the most lethal of all malignancies and are equally notorious for rapidly progressing to advanced stages even in the absence of serious symptoms, thus leading to delayed diagnoses and dismal prognoses. The aim of this study was to determine the prevalence, type, pattern and the histologic characteristics of upper gastrointestinal tumors seen in patients who underwent upper gastrointestinal endoscopy at the Ekiti State University Teaching Hospital, Ado-Ekiti, Nigeria. Materials and Methods: This was a three year cross-sectional study involving 78 patients with suspected upper gastrointestinal tumor referred for upper gastrointestinal endoscopy. The study was conducted from January 2011 to December 2013 at the Ekiti State University Teaching Hospital (EKSUTH), Ado-Ekiti, Nigeria. Relevant clinical information such as age, gender, clinical presentations, smoking history, alcohol use, spices, and consumption of opiates were obtained from the patients. Tissue biopsies were taken from the suspected lesions for histological confirmation and characterization. An ethical clearance for this study was obtained from the EKSUTH Ethical and Research committee and all the patients gave written consent for the study. SPSS version 15.0 (SPSS, Inc., Chicago, Illinois, USA) was applied for statistical analysis using the t-test for quantitative variables and χ2 test for qualitative variables. Differences were considered to be statistically significant if P value was less than 0.05. Results: Seventy eight patients were enrolled into this study comprising 22 females and 56 males. The mean age of the population was 55.75 ± 7.20 years. The presenting symptoms were; abdominal mass in 30.8%, abdominal pain in 29.5%, weight loss in 20.5%, dysphagia in 6.4%, haematemesis in 5.1%, melaena in 5.1% and anaemia in 2.6% of the patients. The risk factors identified in the study included; tobacco use or smoking in 25.6%, alcohol in 19.2%, spices in 14.1%, opiates in 3.8% and combination of the above risk factors in 37.2%. 67.9% of the tumors were located in the stomach, 16.7% in the oesophagus and 15.4% in the first part of the duodenum. Of those located in the stomach, 62.3% were in the antrum while 37.7% were in the corpus. Of the oesophageal tumors, 61.5% were in the mid oesophagus, 30.8% were in the lower oesophagus and 7.8% in the upper oesophagus. Tissue histology showed 70.5% were adenocarcinoma, 26.9% were squamous cell carcinoma, 1.3% lymphoma and 1.3% malignant polyp. This was statistically significant p =< 0.05. Conclusion: In view of the fact that upper GI tumors can rapidly progress to advanced stages in the absence of serious symptoms, gastroduodenoscopy is advocated in patients with signs and symptoms of dyspepsia to avoid delayed diagnosis and improve the disease outcome.
On chromospheric variations modeling for main-sequence stars of G and K spectral classes  [PDF]
E. A Bruevich
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.38087
Abstract: We present a method of 13 late-type main-sequence stars chromospheric flux observation data calculations. These Sun-like stars have well-determined cyclic flux variations similar to the 11-year solar activity cycle. Our flux prediction is based on chromospheric HK emission time series measurements from the Mount Wilson Observatory and comparable solar data. We show that solar three - component modeling explains well the stellar observations. We find that the 10 - 20% of K - stars disc’s surfaces are occupied by bright active regions.
Chronic effect of olive oil on some neurotransmitter contents in different brain regions and physiological, histological structure of liver and kidney of male albino rats  [PDF]
A. E. Bawazir
World Journal of Neuroscience (WJNS) , 2011, DOI: 10.4236/wjns.2011.13005
Abstract: Olive oil is an important source of mono-unsaturated fat and a prime component of the Mediterranean diet. The beneficial health effects of olive oil are due to both its high content of mono-unsaturated fatty acids and its high content of anti-oxidative substances. The objective of this study was to investigate the basis for the epidemiological information relating to the health benefits associated with the consumption of ex-tra-virgin olive oil (EVOO). The effect of olive oil on norepinephrine (NE), dopamine (DA), serotonin (5-HT) and gamm-aminobutyric acid (GABA) con-tents in different brain regions and histological structure of liver and kindey of male albino rats was studied. The chronic administration of olive oil (7.5 mg/kg body wt.) caused a significant increase in norepinephrine (NE), dopamine (DA) , serotonin (5-HT) and gamm-aminobutyric acid (GABA) con-tent in different brain regions (Cerebellum, striatum, cerebral cortex, hypothalamus, brain steam and hip-pocampus) of male albino rats. The increase in NE, DA, 5-HT, and GABA content in the different CNS areas of male albino rat may be due to the inhibition of Ca2+/calmodulin binding which plays an important role in the release of these neurotransmitters. The results, also, revealed that urea and creatinne con-centrations in rats with oral administration with olive oil were decreased. Meanwhile, the activities of the enzymes AsT, AlT and ALP were elevated. The pre-sent results indicated that there is no change in tis-sues of kidney after treated with virgin olive oil. Olive oil may potentially be safe for use as a sedative drug. improvement also led to the reductions in risk of Alzheimer’s and Parkinson’s diseases.
Impact on Water Resources in a Mountainous Basin under the Climate Change Transient Scenario (UKTR)  [PDF]
E. A. Baltas
American Journal of Climate Change (AJCC) , 2014, DOI: 10.4236/ajcc.2014.31010
Abstract:

The impact of climate change on the hydrological regime and water resources in the basin of Venetikos river, in Greece is assessed. A monthly conceptual water balance model was calibrated in this basin using historical hydro meteorological data. This calibrated model was used to estimate runoff under a transient scenario (UKTR) referring to year 2080. The results show that the mean annual runoff, mean winter and summer runoff values, annual maximum and minimum values, as well as, monthly maximum and minimum, will be reduced. Additionally, an increase of potential and actual evapotranspiration was noticed due to temperature increase.

Neural Network Based Normalized Fusion Approaches for Optimized Multimodal Biometric Authentication Algorithm  [PDF]
E. Sujatha, A. Chilambuchelvan
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.78103
Abstract: A multimodal biometric system is applied to recognize individuals for authentication using neural networks. In this paper multimodal biometric algorithm is designed by integrating iris, finger vein, palm print and face biometric traits. Normalized score level fusion approach is applied and optimized, encoded for matching decision. It is a multilevel wavelet, phase based fusion algorithm. This robust multimodal biometric algorithm increases the security level, accuracy, reduces memory size and equal error rate and eliminates unimodal biometric algorithm vulnerabilities.
Iterative Solution of Mesh Constrained Optimal Control Problems with Two-Level Mesh Approximations of Parabolic State Equation  [PDF]
A. Lapin, E. Laitinen
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.61007
Abstract:
We consider a linear-quadratical optimal control problem of a system governed by parabolic equation with distributed in right-hand side control and control and state constraints. We construct a mesh approximation of this problem using different two-level approximations of the state equation, ADI and fractional steps approximations in time among others. Iterative solution methods are investigated for all constructed approximations of the optimal control problem. Their implementation can be carried out in parallel manner.
How the Brain Process Stimulus-Response Conflict? New Insights from Lateralized Readiness Potentials Scalp Topography and Reaction Times  [PDF]
Marc E. Lavoie, Johannes E. A. Stauder
Journal of Behavioral and Brain Science (JBBS) , 2013, DOI: 10.4236/jbbs.2013.31014
Abstract:
Stimulus-Response Compatibility (SRC) refers to the fact that some tasks are performed easier and better than others because of the way stimuli and responses are paired with each other. To assess the brain responses to stimulus-response conflicts, we investigated the behavioral (accuracy and Reaction Times: RTs) as well as the physiological response (Lateralized Readiness Potentials: LRP) modulations in a positional blocked and a conditional mixed design in twelve university students. Results revealed that the performance was less accurate and the RTs, as well as the LRP onset, were delayed under the mixed conditional design. A greater compatibility effect was also noted on accuracy, RTs and LRP onset latency in the mixed design. Consistent with these findings, smaller peak activation at fronto-central areas suggests that more selective inhibition is needed in a mixed design context. Despite a smaller activation, the topographical distribution is similar in both designs. These results indicate that the translation time between stimulus- and response codes are greater under the mixed instruction, while the similar LRP topography suggests that common neural structures underlie LRPs in response to both type of designs.
Numerical Investigation of the Tri-Atomic Ions Formation during Laser Ionization Based on Resonance Saturation  [PDF]
M. A. Abdelati, M. A. Mahmoud, Y. E. E. Gamal
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.212131
Abstract:

We present a theoretical investigation of plasma generation in sodium vapor induced by laser radiation tuned to the first resonance line (3S-3P) at λ = 589 ns. A set of rate equations that describe the rate of change of the ground and excited states population as well as the temporal variation of the electron energy distribution function (EEDF), beside the formed atomic ion Na+, molecular ion  and tri-atomic ions are solved numerically. The calculations are carried out at different laser energy and different sodium atomic vapor densities under the experimental conditions of Tapalian and Smith (1993) to test the existence of the formed tri-atomic ions. The numerical calculations of the electron energy distribution function (EEDF) show that a deviation from the Maxwellian distribution due to the super elastic collisions effect. In

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