Water is a polar molecule that has distinct properties. It has permanet partial charges that allow it to react with itself and other polar molecules. Water has high heat capacity and high surface tension. This is because of the hydrogen bonds that result from one water molecule's hydrogen noncovalenty bonding to the oxygen of another water molecule. The bonds are hard to break thus resulting in these properties.
Wikipedia is not a relable, valid, or trustworthy source. Anyone has the ability to edit the content. However, there is a long list of refferences that you could check out. That would be time consuming though, and not all of the refferences are necessarily valid. There are a lot of journals out there that have good reputations. Wikipedia does not have a good reputation.
My biochemistry lecture covered the properties of amino acids. The general structure of all amino acids is the same. They have a carboxyl group, amino group, central carbon, and R group. Each amino acid falls into one of the four groups: nonpolar, polar, acidic, or basic. The group the amino acid falls into is based off of the structure of the R group. The R groups of the acids and bases, depending on the pH, can be protonated or deprotonated. The carboxyl and amino groups, which are present in all amino acids, also have that properity. The carboxyl group becomes deprotonated at far lower pH levels than the amino group. This is because the structure of the carboxyl group is more electronegative and willing to donate a proton. The acidic and basic amino acids al vary at which pH their R group is deprotonated. The acidic R groups will deprotonate at a lower pH than the basic amino acids. In a protein, the charge can be calculated based off of the pH.
On Monday I wrote a draft about my anatomy and physiology lab. In this lab, we pricked our fingers and collected blood samples. Since then, both of the fingers that I pricked have bruised. After the first day my fingers were soar to the touch. Doing daily tasks, such as locking or unlocking my phone, became annoying because I had to use my non-dominate hand. Luckily, this only lasted a day. The next day my fingers were still bruised, but they were not soar. Now, three days later, the bruising is gone, but there is still a dot where they were pricked. I wonder how much longer it will take for this mark to go away.
Today in biochemistry, we learned about the hydrophobic effect. This is when nonpolar molucules are exposed to an aqueous environment and they bunch together. The process is driven by entropy. Molecules in nature perfer to be disordered, therefore the nonpolar molecules bunch together to minimize interactions with the polar water molecules. When polar and nonpolar molecules interact, the polar molecules form a ridgid shell around the nonpolar molecules. The polar molecules are in a tight formation and not free to move around. The polar water molecules can form dipole-dipole interactions with other polar water molecules because water has permanent, partical charges. The nonpolar molecules form van der waal interactions between themselves. This process can be seen in salad dressing when the bottle is shaken. The bubbles of oil that are formed disperse but reappear after a few minutes.
My life after biology course started discussions this week. They are only 50 minutes long and once a week. Today we just had a basic introduction class and then went around and discussed our goals following graduation. My goal after graduating is to have a hands on job in the medical field in order to gain experience and clinical hours. Right now I am a certified nursing assistant (CNA), but I want a new job in order to get new experiences. I will work this job for about a year, and then I will start a physician assistant or nursing program.
Today in biochemistry we learned about the hydrophobic effect. That is when nonpolar molucules that are exposed to an aqueous environment bunch together. The process is driven by entropy. Because molecules in nature perfer to be disordered, the nonpolar molecule bunch together to minimize interactions with the polar water molecules. The water molecules can form dipole-dipole interactions with one and other because water has permanent, partical charges. The nonpolar molecules form van der waal interactions between themselves. This process can be seen in salad dressing when the bottle is shaken. The bubbles of oil that are formed disperse but reappear after a few minutes.
Today I had my first lab for anatomy and physilogy 2. We pricked our fingers and drew blood into centrifuge tubes. The tubes were spun in the centrifuge, causing the plasma to rise to the top and the formed elements remained on the bottom. The formed elements consist of white and red blood cells. We then calculated the ratio of formed elements to the entire blood content. Following this lab section, the two fingers that I pricked bruised around the puncture spot. The area that had been pricked remained a red dot. Now the area is sore to the touch. It has been 4 hours since the lab, and I am wondering when the brusing will clear.
The object in the container is a worm-like organism. It is small, no longer than a finger nail. The body is the narrowest at the head and continues to widen slightly all the way down the body. The organism has a darker head and appears to have an external, hard shell that is a yellowish and clear color. There appears to be a white, squishy tissue inside of that shell and two dots at the end of the body that look like eyes. It is legless and propels its body by elongating portions at the end of the body that travel up to the head. This motion is similar to a slinky. When the organism is flipped upside down it clings to the floor and does not fall unless the container is shaken. It is very active and has only taken one motionless break which lasted a couple minutes.
The object in the container is a small, worm-like organism. It is no longer than the length my finger nail. The head is more narrow than the rest of the body, that gets slightly bigger and bigger until the end. It moves a lot and appears restless. Elongations of the body from the back to the front propel this creature. It looks slinky-like. It does not appear to have any legs. The head remains down during motion, and pops up when it stops moving. Every once and a while the organism takes a small break that lasts a couple of minutes. The organism appears to have a clear, yellow-tinted colored shell. Inside of the hard looking outer shell there is a look of squishy tissue. The tissue is a white color. When flipped upside down, the organism clings to the floor and does not fall unless shaken.
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