Effects of Temperature and pH on Catalase Activity INTRODUCTION Enzymes are organic catalysts that spur metabolic reactions. The presence of an enzyme within a cell is essential in order for any sort of reaction to take place. All enzymes are complex proteins that act in an organism’s closely controlled internal environment. In such a homeostatic environment‚ the temperature and the pH (concentration of hydrogen ions)‚ remain within a fairly narrow range. Extreme variations in pH and temperature
Premium
aim of this practical is to investigate the effect of exercise on heart rate and breathing rate. We will use a digital heart rate monitor strapped on our chest while we perform different levels of exercise. A digital watch is also provided which receives signals from the heart rate monitor and displays your current heart rate on the screen. To measure the breathing rate at different levels of exercise‚ we measure the breathing rate before physical activity by counting the number of breaths in 10 seconds
Premium Oxygen Carbon dioxide Muscle
Journal of Business & Economics Research – June 2012 Volume 10‚ Number 6 The Effect Of Internal Control On The Operating Activities Of Small Restaurants Linval Frazer‚ College at Old Westbury‚ State University of New York‚ USA ABSTRACT Researchers have found that more than 67% of restaurants fail within the first 3 years of their operation. These findings underscore the restaurant industry’s current crisis of profitability and survivability. The industry’s average profit is generally
Premium Internal control Regression analysis
Lower respiratory infection from biomedical‚ historical‚ social‚ economic‚ and political perspective From a biomedical perspective‚ lower respiratory infections such as pneumonia have escalated in the recent across the globe. They argue that lower respiratory infections are turning out to be a public health concern not forgetting that it is one of the leading causes of illnesses and deaths in individuals of all ages (see table 4). From a biomedical perspective‚ lower respiratory infection is high
Premium Tobacco smoking Tobacco Lung cancer
Chemistry Unit 1 – Revision Questions Chemistry 1A 1) Define an element. How many are there in the Periodic Table? 2) Write a table with the charges and masses of protons‚ neutrons and electrons. 3) Define atomic number and mass number. 4) Draw electron (energy level) diagrams for Be‚ S‚ Al‚ Cl and K. Also‚ write down the number of protons and neutrons for each. Finally‚ write the symbols (with mass no. and atomic no.) 5) Why have all Group 7 elements (halogens) got similar chemical properties
Premium Carbon dioxide Chemical element Carbon
Cost-Volume-Profit Analysis Self-Test Questions 1. The difference between the sales price and the total variable costs is the contribution margin. (D) 2. The breakeven volume in units (perfume sticks) for 2005 is TR-VC-FC=PBT MR=900000/1800 = 500 TR-VC-FC=0 VC/Q = 495000/1800 = 275 Q*MR - Q(VC/Q) = FC Q = _____FC_____ MR-VC/Q Q = 247500/(500 275) Q=1100 Therefore (B) 3. If sales volume is expected to be 2100 units with prices/costs same‚ after-tax net income is expected
Premium Variable cost Management accounting Contribution margin
Disease in the News Michele Frizzell HCS/245 June 2‚ 20104 Erich Widemark Disease in the News Coccidioidomycosis‚ also known as valley fever‚ is a respiratory disease that can be devastating and problematic to diagnosis if unaware of it. To become infected individuals breathe in microscopic Coccidioid fungal spores in the air. Although the majority of individuals who breathe in the spores do not get sick‚ there are several facts about valley fever that everyone should know. The fungus Coccidioid
Premium Fungus Infection Influenza
Investigating Ratios of Areas and Volumes In this portfolio‚ I will be investigating the ratios of the areas and volumes formed from a curve in the form y = xn between two arbitrary parameters x = a and x = b‚ such that a < b. This will be done by using integration to find the area under the curve or volume of revolution about an axis. The two areas that will be compared will be labeled ‘A’ and ‘B’ (see figure A). In order to prove or disprove my conjectures‚ several different values for n will
Premium Real number Number Mathematics
COST-VOLUME PROFIT (CVP) ANALYSIS This is a technique used for planning short-term run profits by finding the relationship between profits and factors that influence profits. The following factors are taken to be influencing profits:- • Selling price • Variable cost of production • Fixed costs • Activity level (production and sales units) Profit planning is based on break-even analysis and can be worked out using either; a) Algebraic method b) Contribution method c) Break-even
Premium Costs Management accounting Variable cost
PHYSIOLOGY OF THE RESPIRATORY SYSTEM The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing. When we breathe‚ we inhale oxygen and exhale carbon dioxide. This exchange of gases is the respiratory system’s means of getting oxygen to the blood. Respiration is achieved through the mouth‚ nose‚ trachea‚ lungs‚ and diaphragm. Oxygen enters the respiratory system through
Premium Respiratory system Oxygen