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Fourier Transform Infrared Spectroscopic Analysis of Protein Secondary Structures Found in Egusi
Yekeen A. Fasasi,
Nikhil Mirjankar,
Ayuba Fasasi
Issue:
Volume 1, Issue 1, June 2017
Pages:
1-4
Received:
28 July 2015
Accepted:
4 August 2015
Published:
1 April 2017
DOI:
10.11648/j.ajaic.20170101.11
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Abstract: FTIR spectroscopy was used to analyze secondary structural composition of protein in egusi. Spectral deconvolution using mathematical techniques such as fourier self deconvolution and second derivative was used to provide meaningful information about the molecular structure of proteins in egusi. The use of second derivative to deconvolute the structure of the amide band in the spectral region 1725 cm-1 to 1580 cm-1 revealed some features indicating valleys that can be associated to the secondary structure of amide I band.
Abstract: FTIR spectroscopy was used to analyze secondary structural composition of protein in egusi. Spectral deconvolution using mathematical techniques such as fourier self deconvolution and second derivative was used to provide meaningful information about the molecular structure of proteins in egusi. The use of second derivative to deconvolute the struc...
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Bifurcation Analysis of a Vaccination Model of Tuberculosis Infection
M. O. Ibrahim,
S. A. Egbetade
Issue:
Volume 1, Issue 1, June 2017
Pages:
5-9
Received:
11 August 2015
Accepted:
28 August 2015
Published:
1 April 2017
DOI:
10.11648/j.ajaic.20170101.12
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Abstract: In this paper, we extend the model of Blower et al. [1] by incorporating certain infection terms such as vaccinated individuals, treatment rate, waning rate and efficacy rate.A bifurcation analysis is performed on the vaccination model by applying a bifurcation method based on the use of center manifold theory.We determine threshold values and derive sufficient conditions for both forward and backward bifurcations.Numerical simulations were carried out and bifurcation diagrams are presented as supporting evidences of our analytical results. The obtained results show the possibility of occurrence of forward and backward bifurcations even when the basic reproduction number is less than one so that it is now possible for the disease to exist. These results suggest the need for more study on the qualitative biological mechanisms responsible for backward bifurcation.
Abstract: In this paper, we extend the model of Blower et al. [1] by incorporating certain infection terms such as vaccinated individuals, treatment rate, waning rate and efficacy rate.A bifurcation analysis is performed on the vaccination model by applying a bifurcation method based on the use of center manifold theory.We determine threshold values and deri...
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Surface Properties of Bacterial Nanocellulose Using Spectroscopic Methods and X-Ray Diffraction
Issue:
Volume 1, Issue 1, June 2017
Pages:
10-13
Received:
11 August 2015
Accepted:
16 September 2015
Published:
1 April 2017
DOI:
10.11648/j.ajaic.20170101.13
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Abstract: In this study, surface properties of bacterial nanocellulose, harvested from different culture media, with and without ethanol, using spectroscopic methods and X-ray diffraction were investigated. The addition of ethanol resulted in BNCs with high O/C ratios. XRD and FT-IR measurements showed a higher crystallinity for the BNC grown in H medium, while BNC grown in Z medium containing ethanol contained more surface carboxylate groups. This study shows that surface properties of BNC can be altered by the culture medium and ethanol.
Abstract: In this study, surface properties of bacterial nanocellulose, harvested from different culture media, with and without ethanol, using spectroscopic methods and X-ray diffraction were investigated. The addition of ethanol resulted in BNCs with high O/C ratios. XRD and FT-IR measurements showed a higher crystallinity for the BNC grown in H medium, wh...
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The Construction and Performance Characteristics of Carbon Paste Electrodes for Oxomemazine Hydrochloride
Yousry M. Issa,
Sayed A. Ahmed,
Nabila S. Mohamed,
Naglaa M. Mohamed
Issue:
Volume 1, Issue 1, June 2017
Pages:
14-21
Received:
21 September 2016
Accepted:
26 September 2016
Published:
1 April 2017
DOI:
10.11648/j.ajaic.20170101.14
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Abstract: The construction and performance characteristics of carbon paste electrodes for Oxomemazine Hydrochloride (OXCl) are described. Different methods for electrode fabrication (modified with the ion-pair, ion pairing agent or soaking the plain electrode in the ion-pair suspension) have been used. Matrix compositions were optimized on the basis of effects of type and content of the modifier as well as influence of the plasticizers. The fabricated electrodes worked satisfactorily in the concentration range from 1×10-6 to 0.001 M with Nernestian cationic slopes, depending on the method of electrode fabrication. The ion-pair modified electrode showed the best performance (slope 57.7 ± 2.1 mV decade-1) compared with the plain electrodes or modified with sodium tetraphenylborate (NaTPB) and fast response time of about 15 s and adequate lifetime (6 weeks). The developed electrodes have been successfully applied as well as end point indicator electrode for the potentiometric titration of OXCl with high accuracy and precision.
Abstract: The construction and performance characteristics of carbon paste electrodes for Oxomemazine Hydrochloride (OXCl) are described. Different methods for electrode fabrication (modified with the ion-pair, ion pairing agent or soaking the plain electrode in the ion-pair suspension) have been used. Matrix compositions were optimized on the basis of effec...
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