As molecules go, dopamine is fairly compact, consisting of just 22 atoms. Only a tiny portion of the brain's 100 billion or so neurons — as few as 20,000 — generate dopamine, most of them in midbrain structures such as thesubstantia nigra, which helps control movement, and the prefron...
Breaking molecules apart and putting molecules together is what enzymes do, and there is a specific enzyme for each chemical reaction needed to make the cell work properly. Maltose is made of two glucose molecules bonded together (1). The maltase enzyme is a protein that is perfectly shaped ...
OLEDs work in a similar way to conventional diodes and LEDs, but instead of using layers of n-type and p-type semiconductors, they use organic molecules to produce their electrons and holes. A simple OLED is made up of six different layers. On the top and bottom there are layers of pro...
Magic molecules: How drugs workthyroglossal duct cystthyroid neoplasmscarcinoma, papillaryaspiration biopsyThe presence of secular trends in the onset or takeoff of the adolescent growth spurt and subsequent adolescent growth of Japanese boys and girls were investigated using data published in "The ...
The basic idea of luminol is to reveal these traces with alight-producing chemical reactionbetween several chemicals andhemoglobin, an oxygen-carrying protein in the blood. The molecules break down and theatomsrearrange to form different molecules (seeMicrosoft Encarta: Chemical Reactionfor more informat...
Cannabinoids— the molecules in cannabis like THC and CBD — interact with receptors throughout the body and brain, including in the pelvic region. Cannabis also appears to be avasodilator, which means it opens the blood vessels. That results inincreased blood flowto the genitals, which isassoci...
If you swapped your eyes for a couple of the world's most powerful microscopes, you'd be able to see things 100 million times smaller: bacteria, viruses, molecules—even the atoms in crystals would be clearly visible to you!Ordinary optical microscopes (light-based microscopes), like the ...
The process continues until you have a long strands of many isoprene molecules linked like a chain. These long strands are called polyisoprene polymer. Each polyisoprene molecule contains thousands of isoprene monomers. As the drying continues, the polyisoprene strands stick together by forming electr...
Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.
consider it a miracle but we’d like to describe it as physics in action. Remember we mentioned earlier how motors and propellers work together. Well, they’re responsible for drones flying. The motors spin the propellers while the latter pushes against the air molecules to get the drone ...