How is pH affecting catalase activity? Hypothesis The catalase activity is assumed to be the most active in pH7. The higher or lower concentration away from the optimum pH of catalase‚ the slower the rate of activity is. Data Collection & Processing I collected the results of pH4‚ pH7‚ pH10 and pH13 after 2 minutes‚ and I repeated the experiment 3 times. Below is a table to show the results‚ their averages and standard deviations: | 1st time (sec) | 2nd time (sec) | 3rd time (sec)
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Figure 7-10 PEAK DETECTOR CIRCUIT A peak detector circuit is a series of diodes and op amps (operational amplifier) connected with capacitor in series fashion to store and hold the peak values given by voltage supply. This circuit will store the highest value or peak value of the given voltage or hold the last given peak voltage to the circuit from the voltage supplier. Peak detector converts the Ac voltage to DC voltage and reduces the disturbance. The function can be explained as follow
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Computer and Information Science; Vol. 7‚ No. 2; 2014 ISSN 1913-8989 E-ISSN 1913-8997 Published by Canadian Center of Science and Education A Fraud Detection System Based on Anomaly Intrusion Detection Systems for E-Commerce Applications Daniel Massa1 & Raul Valverde2 1 Information Technology and Services‚ Betsson‚ Malta 2 John Molson School of Business‚ Concordia University‚ Montreal‚ Canada Correspondence: Raul Valverde‚ John Molson School of Business‚ Concordia University‚ Montreal‚ QC.‚
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Evaluate the case for and against using a buffer stock scheme to stabilize the price of a commodity such as sugar or tin. S Buffer stock schemes seek to stabilize the market price of agricultural products by buying up supplies of the product when harvests are plentiful and selling stocks of the product onto the market when supplies are low. An example of a buffer stock scheme is the international coffee agreement. The international coffee agreement is an international commodity agreement‚ which
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-1A2 CHEMISTRY MODULE 4 definitions (aqa) Rate of Reaction The rate of change of concentration with time (mathematically d[X]/dt). Units are mol.dm-3.s-1 (moles per cubic decimetre per second) Initial Rate This is the rate at the very beginning of the reaction when all the starting concentrations are known exactly. Rate Equation Rate Expression A mathematical expression which relates the rate to the concentrations of substances involved in the reaction Rate Constant‚ k This is the multiplying
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CHAPTER 5. DISCUSSION 5.1. Water quality The average water temperature and average dissolved oxygen obtained during the experiment has been reported as the optimum range (3-10mg/l) for tilapia growth and yields (Meske‚ 1985). Siddiqui et al. (1989) stated that Oreochromis mossambicus has a low oxygen demand and can survive at low oxygen levels (1-2mg/l). Riche and Garling (2003) reported that dissolved oxygen levels should be maintained above 4.9 mg/l for best growth. The water quality tolerance
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FEEDBACK AMPLIFIER FEED BACK: The process of applying a fraction of output energy of some device back to the input is known as feedback. FEEDBACK AMPLIFIER: The amplifier using feed back process is called feedback amplifier. TYPES OF FEEDBACK AMPLIFIER: There are two types of feedback amplifier: a)Positive feedback amplifier b)Negative feedback amplifier POSITIVE FEEDBACK AMPLIFIER: >The amplifier in which feedback energy is applied in the same polarity or in same phase is called
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Cations are a positive charge when an atom loses an electron. Anions are a negative charge when an atom gains an electron. These are the three subatomic particles that make up an atom and their characteristics. Essay- Buffer System Buffers resist pH fluctuations. A buffer is composed of a weak acid and a weak base. Carbonic acid is the weak acid and bicarbonate is the weak base. When a solution is to acidic the pH is low and there are to many hydrogen ions. The low pH level is caused by to
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2. Effect of Ocimum sanctum leaves extract on memory impairment by Scopolamine in test (TE) session using time spent in green arm as a parameter: In order to determine the effectiveness of Ocimum sanctum leaves extract‚ comparison of time spent in the food containing green arm in test session of ocimum sanctum groups‚ OTE and SOTE with the only scopolamine treated group (STE) was carried out. The time spent in the food containing green arm of OTE and SOTE were found to be 109 sec and 93 sec respectively
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EXPERIMENTAL DETAILS All chemicals used were Merck reagent grade. Solutions were formulated with chromium sulfate (Cr¬2(SO4)3.6H2O) as chromium source in the quantities presented in (Table 1); Solutions were heated to 60°C for three hours during complexation reaction as in [29]‚ and pH was adjusted to 3 units without HCl or NH3 . Table1- electrolyte and electrodeposition parameter The coatings were deposited on a 1 x 1.5 cm2 cooper plate sample. Preparation for all specimens was as follow: Firstly
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