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OALib Journal期刊

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Antidiabetic Effect of Pleurotus ostreatus (Jacq.ex Fr) kumm. Mushroom on Alloxan-induced Diabetic Rats.
Imoh Johnny,Joseph Okon
Indian Journal of Pharmaceutical and Biological Research , 2013,
Abstract: Antidiabetic effects of ethanolic extract of Pleurotus ostreatus (mushroom) on alloxan-induced diabetic ratswas studied. The median lethal dose (LD50) of the extract was determined to be 3,472.14 mgkg-1 and a singledose of 380.0, 760.0 and 1140.0 body weight of the extract were intraperitoneally administered as thetreatment dose and the blood glucose levels (BGL) examined for 7 hours and 15 hours (prolonged) at 2 and 4hours intervals respectively. The extract exhibited significant (p<0.05 and p<0.01) reduction in the bloodglucose levels of the albino rats. The extract compared favourably with the standard reference drug(metformin) which all gave their maximum BGL reduction at 5 hours duration. The confirmation ofantidiabetic potentials of the Pleurotus ostreatus tuber has been justified in this study as claimed bytraditional medicine practitionersin Akwa Ibom State.
A theory of the competing supply chain: Alternatives for development
Imoh Antai
International Business Research , 2010, DOI: 10.5539/ibr.v4n1p74
Abstract: Development of a coherent methodology for supply chain vs. supply chain competition remains elusive in literature in terms of purpose, approaches and theoretical foundations. The purpose of this paper is to identify suitable theories of competition from which supply chain vs. supply chain competition may be further developed. Paper explores literature on competition theories, competition and its correlates and also considers the dichotomy between competitiveness and competition in relation to achievement of a competitive advantage in supply chains. An argument is made for the identification and development of theory that reflects the multidimensional, process-based and emergent properties of supply chains. Three competition theories from which supply chain vs. supply chain competition may begin to be conceptualized and possibly operationalized are identified. A chronological conceptualization of competition, competitiveness and competitive advantage, which is intuitive to the realization of competitive advantage in inter-supply chain competition, is also proposed.
Generation of Non-Gaussian Wide-Sense Stationary Random Processes with Desired PSDs and PDFs  [PDF]
Milad Johnny
Journal of Signal and Information Processing (JSIP) , 2012, DOI: 10.4236/jsip.2012.34056
Abstract: This paper describes a new method to generate discrete signals with arbitrary power spectral density (PSD) and first order probability density function (PDF) without any limitation on PDFs and PSDs. The first approximation has been achieved by using a nonlinear transform function. At the second stage the desired PDF was approximated by a number of symmetric PDFs with defined variance. Each one provides a part of energy from total signal with different ratios of remained desired PSD. These symmetric PDFs defined by sinusoidal components with random amplitude, frequency and phase variables. Both analytic results and examples are included. The proposed scheme has been proved to be useful in simulations involving non-Gaussian processes with specific PSDs and PDFs.
Etiology and Diagnosis of Major Depression—A Novel Quantitative Approach  [PDF]
Johnny T. Ottesen
Open Journal of Endocrine and Metabolic Diseases (OJEMD) , 2013, DOI: 10.4236/ojemd.2013.32018
Abstract:

Background: Classical psychiatric opinions are relative uncertain and treatment results are not impressive when dealing with major depression. Depression is related to the endocrine system, but despite much effort a good quantitative measure for characterizing depression has not yet emerged. Methods: Based on ACTH and cortisol levels and using clustering analysis and mixture effect modeling we propose a novel and scientifically based quantitative index, denoted the O-index. The O-index combines a weighted and scaled deviation from normal values in both ACTH and cortisol. Results: Using ANOVA we compare the O-index with opinions reach by classical psychiatric diagnostic procedure (sensitivity 83%, specificity 59%, likelihood ratio positive 2.0, and likelihood ratio negative 0.29). The O-index nicely refines the etiology of depression: Combined with clinical data for 29 subjects earlier reported three categories emerge (p = 4.4 × 10-13): hypocortisolemic depressed, non-depressed, and hypercotisolemic depressed. The O-index also reveals why it has been difficult to obtain good markers earlier. It explains that healthy subjects may have an elevated (suppressed) level of cortisol or ACTH, however, the healthy system is able to deal with such elevated (suppressed) levels by compensating through suppressing (stimulating) the other component. In contrast the O-index shows that depressed subjects are incapable of making such compensation to a satisfactory degree. We illustrate how the O-index may be used for diagnostic procedure. Discussion: The methods are discussed and based on the available data material we propose that the O-index may be used to improve the diagnostic procedure and consequently the follow-up treatment.

Toric Intraocular Lens Malposition Corrected by Lens Repositioning to Manifest Refractive Cylinder Axis in Patient with Irregular Astigmatism Due to Corneal Scar  [PDF]
Riley Sanders, Johnny Gayton
Open Journal of Ophthalmology (OJOph) , 2015, DOI: 10.4236/ojoph.2015.52010
Abstract: A case is presented of a patient with an unexpected poor visual result and subsequent correction following cataract removal surgery via phacoemulsification and intraocular lens implantation using a toric intraocular lens implant (IOL). The initial operation resulted in an uncorrected vision of 20/100 (0.70 logMAR). Retrospective analysis of the patient’s corneal topography revealed irregular astigmatism secondary to remote trauma to the cornea. The cylinder axis on manifest refraction (MR) was significantly different from measured keratometry, so a second procedure was performed to align the cylinder axis of the IOL with the steep axis on MR. This repositioning procedure improved visual outcome to a final uncorrected vision of 20/25 (0.10 logMAR) and best corrected acuity of 20/20 (0.0 logMAR).
Adapting Agriculture to Seasonal Floods in the Aya River Basin, Southeastern Nigeria
Pius B. Utang,Imoh J. Ekpoh
Asian Journal of Agricultural Sciences , 2011,
Abstract: The study determined the pattern of seasonal floods and highlighted the adaptation practices of the floodplain communities for sustainable agriculture. Historical data on water level and corresponding rainfall during the months of June to October were collected from records, while field observations were carried out to determine the inundation levels. Indigenous coping strategies were identified through semi-structured interviews. Three types of peak water levels were identified, with low peaks more common, followed by moderate peaks, while very high peaks were rare. Majority of the seasonal floods were in the months of September and October, during full maturity of the crops cultivated in the floodplains and harvest is awaited. Early peaks (between June and July) were few and recognized as being mostly flashy. Rainfall-runoff relationship was weak, albeit significant, even as the peak pattern did not graphically synchronize rainfall. This confirmed that most of the peaks were as a result antecedent rains or rains from the headwater zones. The generally consistent concentrations of low to moderate flows were useful for the flood recessional cultivation. The high flows (>/= 5m) were generally considered to be flashy and harmful to the farmers, particularly early plantings. Due to the uncertainty and rarity of high peaks, flood recession agricultural practices remained the only adaptation option available to the local communities. Watershed management was recommended to sustain existing regime, while artificial irrigation as patchily practiced should be intensified as additional impetus for sustainable agriculture and food security.
A Simplified Microcontroller Based Potentiostat for Low-Resource Applications  [PDF]
Bolaji Aremo, Mosobalaje Oyebamiji Adeoye, Imoh Bassey Obioh, Odunayo Adetola Adeboye
Open Journal of Metal (OJMetal) , 2015, DOI: 10.4236/ojmetal.2015.54005
Abstract:

A low component count, microcontroller-based potentiostat circuit was developed through the use of operational amplifiers arranged in different feedback configurations. This was developed to alleviate the cost burden of equipment procurement in low-cost and budget applications. Simplicity was achieved in the design by the use of the microcontroller’s native functionalities and a low-cost R/2R resistor ladder digital-to-analogue converter. The potentiostat was used to investigate the Ni2+/Ni(s) redox couple in a 3-electrode cell with a silver/silver chloride reference electrode and graphite counter and working electrodes. Linear sweep voltammograms were ob-tained at scan rates of 10, 20, 30 and 40 mV/s. The analysis of the peak current versus (scan rate)1/2 plot indicated that the Ni2+/Ni(s) reduction, though conforming to the Randles-Sevcik equation, was a non-reversible redox reaction.a

Solution matching for boundary value problems for linear equations
Johnny Henderson
International Journal of Mathematics and Mathematical Sciences , 1989, DOI: 10.1155/s0161171289000876
Abstract:
k-component disconjugacy for systems of ordinary differential equations
Johnny Henderson
International Journal of Mathematics and Mathematical Sciences , 1986, DOI: 10.1155/s0161171286000467
Abstract: Disconjugacy of the kth component of the mth order system of nth order differenttal equations Y(n)=f(x,Y,Y ¢ € 2, ¢ € |,Y(n ¢ ’1)), (1.1), is defined, where f(x,Y1, ¢ € |,Yn), ¢ f ¢ yij(x,Y1, ¢ € |,Yn):(a,b) —Rmn ¢ ’Rm are continuous. Given a solution Y0(x) of (1.1), k-component disconjugacy of the variational equation Z(n)= ¢ ‘i=1nfYi(x,Y0(x), ¢ € |,Y0(n ¢ ’1)(x))Z(i ¢ ’1), (1.2), is also studied. Conditions are given for continuous dependence and differentiability of solutions of (1.1) with respect to boundary conditions, and then intervals on which (1.1) is k-component disconjugate are characterized in terms of intervals on which (1.2) is k-component disconjugate.
Optimality and existence for Lipschitz equations
Johnny Henderson
International Journal of Mathematics and Mathematical Sciences , 1988, DOI: 10.1155/s0161171288000328
Abstract: Solutions of certain boundary value problems are shown to exist for the nth order differential equation y(n)=f(t,y,y ¢ € 2, ¢ € |,y(n ¢ ’1)), where f is continuous on a slab (a,b) —Rn and f satisfies a Lipschitz condition on the slab. Optimal length subintervals of (a,b) are determined, in terms of the Lipschitz coefficients, on which there exist unique solutions.
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