Global Interest Rate Environment with Emphasis on Quantitative Easing Implications
Issue:
Volume 5, Issue 4, July 2017
Pages:
59-63
Received:
2 March 2017
Accepted:
24 March 2017
Published:
1 June 2017
Abstract: Constructing global real interest rates at short and long maturities and reviews their evolution since 1980. It also traces the evolution of the cost of capital, It then analyzed key factors that could explained the observed pattern, shift in savings, changes in monetary and fiscal policy, shift in investment demand, changes in relative prices of investment, monetary policy and portfolio shifts between bonds and equity. It closes by considering how the main factors behind the decline in real interest rates might play out in the medium term. Real interest rates and the cost of capital are likely to rise moderately in the medium term from current level. Part of the reason is cyclical, the extremely low real interest rates of recent years reflects large negative output gaps in advanced economies. Indeed, the real interest rates might have declined even further in the absence of the zero lower bound on nominal interest rate.
Abstract: Constructing global real interest rates at short and long maturities and reviews their evolution since 1980. It also traces the evolution of the cost of capital, It then analyzed key factors that could explained the observed pattern, shift in savings, changes in monetary and fiscal policy, shift in investment demand, changes in relative prices of i...
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Exponential Growth and Solvents-Production of Clostridium acetobutylicum ATCC 824 on TYA Media Containing Sucrose and Glucose as Different Sole Carbon Sources
Elizabeth Omolola Oladapo,
Enimie Endurance Oaikhena,
Mohammed Sani Abdulsalami
Issue:
Volume 5, Issue 4, July 2017
Pages:
64-69
Received:
26 March 2017
Accepted:
19 April 2017
Published:
19 June 2017
Abstract: Clostridium acetobutylicum ATCC 824 is a solventogenic, obligate anaerobic bacterium that can grow on various types of carbohydrates and are capable of producing spores. In the present study, Clostridium acetobutylicum was successfully grown on TYA medium (tryptone, yeast, acetate medium) containing two different carbon sources, glucose and sucrose coupled with the production of acids (butyric and acetic acid) and solvents, ABE (acetone, butanol and ethanol). An investigation was undertaken to determine the impact of the two types of carbon sources on the solvent production and growth of Clostridium acetobutylicum. HPLC and GC analysis revealed the amount of acids and solvents produced respectively, as well as the amount of unutilized sugars. The amount of combined ABE produced on glucose (0.19g/l A, 0.39g/l B, 0.06g/l E) was higher than on sucrose as carbon source (0.15g/l A, 0.30g/l B, 0.03g/l E). The colony forming units of Clostridium acetobutylicum grown on glucose (4.70 x 105 units/ml) was higher than on sucrose (0.1 x 105) as judged by dilution spread plating on agar. Hence, Glucose was confirmed as the carbon source characterized by the best performance for solvents production and growth of the bacterium. The whole production process on both glucose and sucrose was observed to mainly influence the production of butanol with the concentration of 0.39g/l and 0.30g/l respectively, over the production of other solvents. Higher amount of solvents was produced at lower pH in both cultures with the different carbon sources. Wet-mounts, gram stain and endospore stain were used to determine the motility, type and sporulation of Clostridium acetobutylicum respectively. Acidogenic phase which seems to couple with the growth of vegetative cells, results into production of acetic and butyric acids. Solventogenic phase commences with a drop in pH and is accompanied by the onset of sporulation.
Abstract: Clostridium acetobutylicum ATCC 824 is a solventogenic, obligate anaerobic bacterium that can grow on various types of carbohydrates and are capable of producing spores. In the present study, Clostridium acetobutylicum was successfully grown on TYA medium (tryptone, yeast, acetate medium) containing two different carbon sources, glucose and sucrose...
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Antibacterial Activity of Cuminum Cyminum L. Oil on Six Types of Bacteria
Amina Abdelraheim Belal,
Faroug B. M. Ahmed,
Lyali Ibrahim Ali
Issue:
Volume 5, Issue 4, July 2017
Pages:
70-73
Received:
25 February 2017
Accepted:
11 March 2017
Published:
12 July 2017
Abstract: The Cuminum Cyminum (cumin) oil was extracted from cumin seeds by distillation process. The extracted cumin oil was used to assess its effectiveness as antibacterial that through testing on six types of bacteria; two of them were bacteria gram-negative (E. coli and S. typhi) and the remainders were bacteria gram-positive (Proteus Vulgaris, Klebsiella Pneumonae, Enterococcus Feacalis and Staphylococcus Aureus). Four concentrations (12.5%, 25%, 50% and 100%) of cumin oil were used for screening fulfillment by using the cup-plate agar diffusion method and gentamicin (10µg) as the positive control. According to different concentration the inhibition area, minimum inhibition zones diameters (MIZD) in mm and the relative percentage inhibition of the test with respect to positive control were calculated. The results showed that all tested concentrations of cumin oil showed antibacterial activity against gram positive and gram negative bacteria.
Abstract: The Cuminum Cyminum (cumin) oil was extracted from cumin seeds by distillation process. The extracted cumin oil was used to assess its effectiveness as antibacterial that through testing on six types of bacteria; two of them were bacteria gram-negative (E. coli and S. typhi) and the remainders were bacteria gram-positive (Proteus Vulgaris, Klebsiel...
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