• Sodium Chloride Oxygen Beaker Enzyme
    1,273 words
    DESCRIPTIVE TITLE The Effect of Different Amounts of Sodium Chloride on the displacement of oxygen. INTRODUCTION The dependability of the rate of an enzyme-mediated reaction is based on two factors: the substrate concentration and the concentration and action of the enzyme that catalyzes the reaction (Vander, et. al. , 2001). Enzymes are catalysts that produce chemical reactions in cells. Enzymes which are large proteins perform a reaction which acts upon a substance known as a substrate. When ...
  • Faster Dissolved Oxygen Test Kit
    3,795 words
    Faster Dissolved Oxygen Test Kit Purpose The purpose of my project is to determine if there is any significant difference in dissolved oxygen (DO) levels as measured by the traditional HACH (R) method or the newly developed CHEMets (R) test kit under typical field conditions. Hypothesis My hypothesis is that there is no significant difference in dissolved oxygen (DO) levels as measured by the traditional HACH (R) method or the newly developed CHEMets (R) test kit under typical field conditions. ...
  • Photosynthesis Leaf Material
    396 words
    Photosynthesis 1. Would you illuminate your house plants with a green light bulb? Why or why not? It would not be a wise choice to put a plant under a green light bulb. The reason for this is that due to the fact that the leaves are green they reflect green light. This shining green light onto the flowers will cause photosynthesis to stop. Since the light is being reflect d, the cells do not get any light. With out light they cannot carry out the everyday of photosynthesis. If the choice was mi...
  • Oxygen Carbon Dioxide
    1,290 words
    Oxygen Oxygen Atomic number 8 Atomic weight 15. 9994 Melting point-218. 4 oC (-361. 1 oF) Boiling point-183. 0 oC (-297. 4 oF) Density (1 atom, 0 oC) 1. 429 g / l Valence 2 electronic con fig. 2-6 or 1 s 22 s 22 p 4. Oxygen is one of the must important factors that made it possible for life to exist in this planet. Oxygen is also one of the elements must found in earth. Oxygen can be found in in metals, water, and even the one thin that protects us from the powerful sun rays. Oxygen is a very ...
  • Oxygen Atoms Per Molecule
    781 words
    Oxygen Oxygen, symbol O, colorless, odorless, tasteless, slightly magnetic gaseous element. On earth, oxygen is more abundant than any other element. Oxygen was discovered in 1774 by the British chemist Joseph Priestley and, independently, by the Swedish chemist Carl Wilhelm Schiele; it was shown to bean elemental gas by the French chemist Antoine Laurent Lavoisier in his classic experiments on combustion. Large amounts of oxygen are used in high-temperature welding torches, in which a mixture o...
  • Oxygen Found Priestly Chemist
    266 words
    Discovery Oxygen was first discovered by two scientists. One was a British Chemist Joseph Priestly who was given credit for the discovery in 1774. The other was a Swedish Chemist Carl Wilhelm Schiele who had also discovered it around the same time as Priestly. Yet Priestly was given credit because his work, and results were published. Priestly had first found this new element when he observed that mercuric oxide, on heating. Yielded a gas that caused a flame to burn faster. He later found that ...
  • Phosphates And Dissolved Oxygen
    829 words
    Phosphates are present in many natural waters, such as lakes and streams. Phosphates are essential to aquatic plant growth, but too much phosphate can lead to the growth of algae and results in an algae bloom. Too much algae can cause a decrease in the amount in dissolved oxygen in the water. Oxygen in water is affected in many different ways by phosphates Phosphorus is usually present in natural waters as phosphate (Mc welsh and Raintree, 1998). Phosphates are present in fertilizers and laundry...
  • Blood Vessel Oxygen Cells Water
    484 words
    1) To overcome many of the obstacles on the path of any life function, specifically gas exchange, evolution has provided many adaptations. Some of these are the gills fish have developed, some insects ability to diffuse oxygen to individual cells or a moist diffusion barrier in humans. Fish have developed a trait called countercurrent exchange, in which blood passes through vessels in a direction opposite to that of water flowing over the gills of the fish. This allows the oxygen-rich water to f...
  • Oxygen Carbon Dioxide
    2,658 words
    Oxygen Oxygen and its compounds play a key role in many of the important processes of life and industry. Oxygen in the biosphere is essential in the processes of respiration and metabolism, the means by which animals derive the energy needed to sustain life. Furthermore, oxygen is the most abundant element at the surface of the Earth. In combined form it is found in ores, earths, rocks, and gemstones, as well as in all living organisms. Oxygen is a gaseous chemical element in Group VA of the per...
  • Important Chemical Elements Food Web
    630 words
    I believe that the three most important elements that exist are nitrogen, carbon and oxygen. Nitrogen is extremely valuable because it is such a large part of the food web. Carbon is important because it is also part of the food web due to the fact that it plays such an important role in the structure of all living things and many nonliving things. Carbon also provides our natural fuel. Oxygen is important because it is essential in many processes that enable life and in the transformation of e...
  • Physiological Adaptations Of The Plesiosaur For Holding Its Breath
    1,256 words
    Physiological Adaptations of the Plesiosaur for 'Holding its Breath " By Nathan Eaton One hundred and fifty million years ago, large aquatic species of reptile such as the Plesiosaur dominated the ocean, and were pre-eminent predators of the sea. The branch of now extinct Plesiosaurs, or 'near lizards', evolved into variant closely related species specialised to take different niches in the food chain. Such species of Plesiosaur include the phenotypically similar Plesiosauroid and Pliosauroid. T...
  • Respiration Carbon Dioxide
    786 words
    We as humans need a way to gather oxygen from our environment to survive. In response our body has a system that carries out respiration which is the of oxygen to the blood and the disposal of the waste product carbon dioxide. In the human breathing process the first step is the breath in. First we open the mouth and expand our lungs to bring in air. The first place the air traves into our mouths which is an opening in the human body used for taking in air, food, and the releasing of carbon dio...
  • Cellular Respiration Germinating Peas
    596 words
    Cellular Respiration Lab Report Wednesday 8: 00 A. M. Lab March 2 nd, 2005 I. Introduction In this lab we are measuring the amount of oxygen used in both germinating and non germinating peas. We are measuring the oxygen consumption by taking a reading of a re spirometer submerged in two water baths. The first bath will be cold water and the second warm to determine the effect of temperatures on oxygen consumption. Our negative control will be glass beads to measure to increase or decrease in at...
  • The Comparative Abundance Of The Elements
    537 words
    The Comparative Abundance of The Elements By Derrick Deacon- There are 92 naturally occurring elements, only 17 of them make up 99. 5% of the earth's crust (including oceans and atmosphere). - In living things (plants, animals, people) the six most abundant elements are carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur. - The universe is dominated by the elements hydrogen (83%) and helium (16%) 1. The Crust The outside of the earth is a thin crust which is approximately 20 to 40 km thick...
  • Diving Animal Oxygen Myoglobin Lungs
    508 words
    When a diver dives deep for a period of time, breathing regular compressed air, a certain amount on nitrogen will be dissolved in the blood. If the diver comes back up to the reduced pressure of the surface too quickly, small bubbles of nitrogen will form in the blood stream. This is called "the bends" and requires the person to spend some time in a decompression chamber to gradually reduce the pressure and allow the nitrogen to escape the body. Some animals goes down much deeper then we do, so ...
  • Dissolved Oxygen Water Levels Gas
    629 words
    Research Dissolved oxygen infers to the volume of oxygen that is contained in water. Oxygen enters water through photosynthesis and across the water interface. The amount of oxygen that can be held by the water depends on the water pressure, salinity, and temperature. Gas solubility increases with decreasing temperature; thus colder water holds more oxygen. A reason why freshwater holds more oxygen than does saltwater is because gas solubility increases with decreasing salinity. When there is a ...
  • Oxygen Carbon Dioxide
    2,275 words
    Oxygen is one of the 92 known elements. An element is a substance that cannot be decomposed into a simpler substance by any simple means. Each of the 92 naturally occurring elements are therefore one of the fundamental materials from which everything in the Universe is made. The History of Oxygen On August 1, 1774, Joseph Priestley examined the effect of intense heat on mercuric oxide. He noted that an air or gas was readily expelled from the specimen. To his surprise a candle burned in this wit...
  • Hypoxia High Altitude
    1,651 words
    Hypoxia Hypoxia is a condition in humans that is caused by the reduction in partial pressure of oxygen, inadequate oxygen transport, or when tissues are simply unable to make use of the oxygen provided. This disease occurs in the tissues and brain. It results in a shortness of breath, and an overall impairment of function. Anoxia is the extreme form of hypoxia, and it occurs when there is absolutely no oxygen at all in the body that the brain and tissues can make proper use of. There are five d...
  • Onset Of Blood Lactic Acid Accumulation Obla
    374 words
    OBLA - onset of blood lactic acid accumulation Other wise known as the 'lactate threshold' this is the point at which lactate levels in blood exceed resting values during the lactic acid build up due to exercise. Long term adaptations of OBLA to aerobic training.  This point governs the lactic aerobic threshold  Trained athletes begin OBLA at higher work intensities  And higher values of VO 2 max than untrained people. By definition, the lactate threshold has been thought...
  • Airway Fires Do Oxygen Enriched
    526 words
    Do oxygen-enriched atmospheres exist beneath surgical drapes and contribute to fire hazard potential in the operating room? Title/Abstract The title accurately reflects the description of the study undertaken, while the abstract describes the study, method, and supported outcome of the study. The research question is presented in an attempt to bias the reader is made by stating, " oxygen concentrations beneath the drapes were significantly reduced with the use of the scavenger system.' Methods u...