The EcoSphere needs indirect light, from either an artificial source or sunlight, for 6-12 hours every day. … These systems do very well with low light levels. Light causes the algae to grow rapidly, which will change the chemical balance of the sphere and the shrimp will perish. What doRead More →
Yeast, when under anaerobic conditions, convert glucose to pyruvic acid via the glycolysis pathways, then go one step farther, converting pyruvic acid into ethanol, a C-2 compound. Do yeast cells grow faster with or without oxygen? Where oxygen is present, the yeast can concentrate on growing and maintaining its cells,Read More →
An oxygen content of 19.5 percent can support life and is adequate for entry. … Atmospheres with a concentration of flammable vapors at or above 10 percent of the lower explosive limit (LEL) are considered hazardous when located in confined spaces. What is UEL and LEL? Lower explosive limit (LEL):Read More →
Aerobe, an organism able to live and reproduce only in the presence of free oxygen (e.g., certain bacteria and certain yeasts). Organisms that grow in the absence of free oxygen are termed anaerobes; those that grow only in the absence of oxygen are obligate, or strict, anaerobes. Can grow bothRead More →
Know how much air to give. A normal adult BVM holds about 1.5 L of air – almost three times the American Heart Association’s recommended 600 mL tidal volume for an adult patient. Why is oxygen needed during CPR? Increasing blood oxygen content through the use of supplemental oxygen canRead More →
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. … This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules. How many oxygen atomsRead More →
The characteristic temperature, spread rate and power of smoldering combustion are low compared to flaming combustion. Typical peak temperatures for smoldering are in the range from 450 to 700°C, although very energetic and dense fuels such as coal can reach peaks at around 1000°C. What smouldering means? US smolder /Read More →
Supplemental oxygen benefits climbers in two different ways. First, it decreases the altitude that you feel. Second, it helps keep you warm by allowing the blood to flow more freely to the extremities. For the sake of brevity, we will only explore the decrease in physiological altitude in this post.Read More →
Respiratory Alkalosis The increase in pH is often caused by hyperventilation (excessively deep breathing). When a person hyperventilates they exhale more carbon dioxide than normal. As a result the carbon dioxide concentration in the blood is reduced and the bicarbonate/carbonic acid equilibrium shifts to the left. Why does hyperventilation decreaseRead More →
Treatment with cold sulfuric acid gives red crystals of chromic anhydride (chromium trioxide, CrO3): K2Cr2O7 + 2 H2SO4 → 2 CrO3 + 2 KHSO4 + H2O. On heating with concentrated acid, oxygen is evolved: 2 K2Cr2O7 + 8 H2SO4 → 2 K2SO4 + 2 Cr2(SO4)3 + 8 H2O + 3Read More →