However, DNA is not the only molecule that can absorb UV light at 260nm. Since RNA also has a great absorbance at 260nm, and the aromatic amino acids present in protein absorb at 280nm, both contaminants, if present in the DNA solution, will contribute to the total m...
Molecules are constantly vibrating, and these vibrations change when the molecules absorb IR light. The changes in vibration include the bending and stretching of various bonds. Each type of bond within a molecule absorbs IR at different wavelengths. So, to identify ethanol in a sample, you have...
When electrically stimulated, a pseudo molecule (dimer) is produced. When lased, the dimer produces light in the ultraviolet range. Dye Lasers Dye lasers use complex organic dyes, such as rhodamine 6G, in liquid solution or suspension as lasing media. They are tunable over a broad range of ...
Formaldehyde, an organic compound, has many uses. It is most commonly used for embalming. However, you can also use it to make building materials, textiles, household cleaning products, personal care products, and plastics. It is also found in many foods, such as the humble egg. ...
8. Test yourself before the teacher doesThis is the step many people won’t take: practice recalling the info by going from station to station.After you’ve gone through and used your Memory Palace to put every bit of information on those 30 cards into the proper station, you can make ...
According to theTed-Ed Animation,“A 25-kilogram ape has to eat 8 hours a day to uphold a brain with 53 billion neurons.”One theory is that the invention of cooking food gave humans the means to power their growing brains because our guts could more easily absorb energy from cooked ...
How does a hair dryer generate such a strong gust of air in the first place? This model uses a small fan that looks like a hydraulic turbine (i.e. water wheel). Unlike the water wheel, which harnesses the potential energy of flowing water to generate power, the fan in a hair dryer ...
Our skin and eyes absorb infrared radiation (IR) as heat. Overexposure to IR can result in burns and pain. Ultraviolet (UV) radiation overexposure concerns us because there are no immediate symptoms. However, effects can develop quickly afterward in the form of a sunburn or worse. Overexposure...
Other FDA bottled-water regulations determine the maximum levels of certain contaminants allowed, including organic (bacteria, viruses, parasites) and inorganic (radon, lead, arsenic). These regulations are based on the EPA's requirements for tap water, but there are differences. The FDA does not...
The carbon captured from the atmosphere during this process is also used as the structural foundation for creating organic compounds essential for growth and development. Photosynthesis uses other mechanisms – light and dark reactions with photosystems I and II to absorb light. To understand these me...