Biomass - IER
Environmental Protection Agency wants to up the percentage blended with gasoline from 10 percent to 15 percent for use in automobiles of 2001 vintage and later models. Because of such impediments to corn-based ethanol, much research has been undertaken to develop processes for the conversion of cellulosic biomass into a source of ethanol
Konrad Hoersch, Collaroy It may be a more interesting question to ask: If World War I had ever happened, would Adolf Hitler ever have come to power? Phil Stilwell, Waverton Hitler took Germany into World War II on the back of the failure of the Weimar Republic, rampant poverty and the perceived unfairness of the Treaty of Versailles, which had caused outrage among German nationalists. The permanent gases in air we exhale are roughly 78 per cent nitrogen, 15 to 18 per cent oxygen (we retain only a small amount), 4 to 5 per cent carbon dioxide and 0.96 per cent argon, the CO2 being of course used by plants during photosynthesis
Dissolved Oxygen - Environmental Measurement Systems
Dissolved oxygen depletion is the most common cause of fish kills When a body of water is overproductive, the oxygen in the water may get used up faster than it can be replenished. Extended periods of supersaturation can occur in highly aerated waters, often near hydropower dams and waterfalls, or due to excessive photosynthetic activity
Photosynthesis
The energy provided by coal, oil, and gas comes from photosynthesis carried on by plants of earlier times and preserved down through the ages, to be released by combustion in modern industrial processes. Photosynthesis Photosynthesis: Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy
The Discovery of Oxygen
The gas emitted, he found, was "five or six times as good as common air." (1) In succeeding tests, it caused a flame to burn intensely and kept a mouse alive about four times as long as a similar quantity of air. These kinds of observations led Priestley to offer an interesting hypothesis that plants restore to the air whatever breathing animals and burning candles remove - what was later coined by Lavoisier "oxygen"
They do not use them during the day because they seek to prevent excessive loss of CO2 which the plants use.For dedicated planted tanks with CO2 injection this desire to provide the plants with sufficient CO2 and the fish with adequate oxygen may be in direct opposition, so a compromise must be found if loaches are being kept in the aquarium. Athletes increase their bodies' efficiency at oxygen utilization by training because that and muscle strength are essential to performance.A fish reacts to exercise or low oxygen levels in a similar fashion
Photosynthesis
CHLOROPLASTS All of the "black dots" in the picture represent chloroplasts, which are the cell organelles in plant cells where the chemical reactions of photosynthesis take place. a) root hairs - ON ROOTS, NOT NEAR LEAVES b) xylem - TUBES THAT TRANSPORT WATER IN THE PLANT c) lenticels - OPENING ON WOODY STEMS FOR GAS EXCHANGE d) stomates 3
plecoplanet: Aeration and dissolved oxygen in the aquarium
Ammonia is converted to nitrite and nitrate in the nitrogen cycle, and these nitrifying bacteria require much more oxygen than the "ordinary" metabolism of aerobic bacteria, the ones that break down organic matter and metabolize organic carbon. The reaction for the aerobic respiration is essentially the reverse of photosynthesis, except that now there is a large release of chemical energy (from stored ATP molecules)
This stores the energy in chemical bonds (in the sugars) and releases O2.The chemical equation for this is:6CO2 + 6H2 C6H12O6(sugar) + 6O2The plants use those sugars like we do when we consume them, for energy. Plants actually hold on to a small amount of the oxygen they produced in photosynthesis and use that oxygen to break down carbohydrates to give them energy
The chemical that crosses the synaptic cleft and causes the transmission of the nerve message in an adjacent neuron or the stimulation of an effector cell (muscle or gland). nonvascular plants Plants lacking lignified vascular tissue (xylem), vascularized leaves, and having a free-living, photosynthetic gametophyte stage that dominates the life cycle
Photosynthesis definition of Photosynthesis in the Free Online Encyclopedia
Desert plants in the Crassulaceae, Cactaceae, Euphorbiaceae, and 15 other families evolved, apparently independently of C4 plants, an almost identical strategy of assimilating CO2 by which the CO2 is taken in at night when the stomata open; water loss is low because of the reduced temperatures and correspondingly higher humidities. Some parts of the chloroplast, namely the stroma, which are located between the thylakoids, contain enzymes that catalyze the dark reactions of photosynthesis, such as the conversion of carbon, nitrogen, and sulfur, as well as the biosynthesis of carbohydrates and proteins
Oxygen optodes and meters are precise and easy to use, but they are expensive.The amount of oxygen dissolved in water may be expressed as a concentration (i.e., the weight or volume of oxygen in a volume of water). The essential first step is dissolved oxygen monitoring; with this information the clam grower can evaluate lease quality and take steps to reduce the impact of dissolved oxygen
Autumn Leaves and Fall Colors - Why do autumn leaves change color?
Did you ever wonder how and why a fall leaf changes color? Why a maple leaf turns bright red? Where do the yellows and oranges come from? Table of Contents Why Do Leaves Change Color? Photosynthesis Autumn Preparations for Winter Learn More: Surviving Winter Easy Reading Projects To answer those questions, we first have to understand what leaves are and what they do
I study phytoplankton, so I'm glad to hear that you know what phytoplankton are and that you know one of the reasons why phytoplankton are so important to the earth. When they do this they consume water and also carbon dioxide, and they produce oxygen.Now that you know how phytoplankton produce oxygen, can you guess what other types of things might be producing oxygen? Anything that uses photosynthesis! This means that grass, trees, flowers, bushes, and all of the other plants are producing oxygen
During this stage of photosynthesis, as the sunlight excites the chlorophyll, water is split into oxygen and hydrogen, and the oxygen is released into the atmosphere. The water travels up the stem of the plant through a complex transport system and arrives in the leaves, to be used as a raw material during photosynthesis
The Petition: A Global Warming Case - National Center for Case Study Teaching in Science
They typically include a summary of the case, teaching objectives, information about the intended audience, details about how the case may be taught, and a list of references and resources
Photosynthesis
Senebier concluded (erroneously as it turned out) that in photosynthesis carbon dioxide is decomposed, with the carbon becoming incorporated in the organic matter of the plant and the oxygen being released. If, on the other hand, both the carbon dioxide and the water contribute to the oxygen released, we would expect its isotopic composition to have been some intermediate figure
What does this have to do with photosynthesis? It turns out that photosynthetic reaction centers are natural photochemical switches of molecular dimensions. The burning of fossil fuels releases not only carbon dioxide, but also hydrocarbons, nitrogen oxides, and other trace materials that pollute the atmosphere and contribute to long-term health and environmental problems
Photosynthesis 1
In the light reactions, excited electrons from chlorophyll flow through a cytochrome transport system along membranes of the thylakoid disks (thylakoid membranes). When the guard cells lose water pressure on a hot day, they deflate and push together, thus closing off the stoma and reducing water loss (transpiration) through the leaf
Algae Fuel In the search for alternatives to gasoline, are algae the answer? From Pond Scum to Power In this animated primer, learn why algae and other plants make oil, and how algae oil gets converted to biodiesel. The Perfect Hunter Could social intelligence be the key to hyenas' deadly hunting skills? Sexual Cannibalism Biologist Maydianne Andrade says that the gruesome mating behavior of some spiders is a lesson in evolution
Other People Are Reading Why Is Water Important to Photosynthesis? Where Does Glucose Come From in Plants? Sunlight and Photosynthesis The sun's rays are the first step in the process of photosynthesis. The chemical process that results from combining light energy, water, and carbon dioxide creates simple sugars, but the oxygen that is introduced into the equation by water is not really required
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