My article was about caffeine; what it does and how much a person can consume. The article stated that caffeine is structurally similar to adenosin, which is found in our brains. The job of adenosin is to slow nerve activity, caffeine binds with adenosin receptors and blocks the receptor, as well as increases nerve activity. The incease isn't a bad thing, with feeling stimulated, more alert, and energetic. But, too much caffeine intake can cause nervousness, headaches, and increased heart beat.
One thing I find is that teenagers usually intake much more caffeine than the article states is safe (200-300mg), as well as adults (400mg). The article also provides a table of how much caffeine any product has.
And let's not forget its addictive nature! Ever been around someone trying to kick their caffeine addiction? Not fun!
My article was about tattoos. Everyone knows that tattoos are ink that is ejected with a needle past the epidermis to the dermis, so the pigment stays there (for the most part). This article was explaining what the ink is made of. "Most tattoo inks are pigments suspended in a carrier solution that keeps the color pigments evenly distributed for smooth application. Salts of heavy metals are usually the source of color for the inks." What this is saying is that the ink is made of metals (from the periodic table and found on earth).
This was most interesting to me because in know that some of those metals can cause medical issues. Black ink, which is usually the most common color, is made of iron and carbon, but red ink is made of mercury and cadminum, which are both known to cause brain, lung, kidney, heart, and immune system damage. Other colors, which are composed of other types of metals, are known to possibly cause harm to your body--moral of the story: think before you ink.
I've heard horror stories of people having allergic reactions to the ink, too, especially the reds. Google some pictures someday if you get bored ;)
The antibiotic tetracycline, excess fluoride, or trauma can darken or reveal the yellow inner tooth. Coffee, tea, cola drinks, or smoking will attack the outer surface. The common whitening methods target only outer stains. Enamel is the hardest substance in your body, and is composed of phosphate and calcium.
All optional whitening methods except the natural method use hydrogen peroxide. According to the American Dental Association, bleaching with 10% carbamide peroxide or 3.6% hydrogen peroxide is considered safe and effective. Bleaching may initiate temporary tooth sensitivity or cause gum irritation. The stronger the concentration is the greater chance of damage. If you do decide to whiten your teeth please know your options. The key to maintaining the white color on your teeth: brush, floss, and eat an apple after drinking coffee, tea, or cola drinks.
Have you ever tried to whiten your teeth? I had a kit once from the dentist and, as your summary pointed out, it caused extreme tooth sensitivity. I had to stop using it, which was a shame since it was really expensive!
I choose to read the article about the science of sleep because I always had trouble with my sleep. When I was younger I couldn't go to sleep and now that I'm a teenager it seems that I can't stay awake. So it was interesting that teens need two to three hours more sleep then adults and kids. The most interesting thing I learned was how light effects our melatonin. I know what melatonin was because I would have to take it when I was a child. But I didn't know that the gland that produces it would only release it when it is dark out. I'm one of those weird kids who can get up really early and fall asleep early.
So I don't think that school should be a later time. I am usually really tired if I don't get a nap in between lunch and dinner but for the last couple years I have tried to keep my sleeping schedule ( which i learned is a very good thing to do when going to high school) the same. I will get up at 7:30 and go to sleep at 10. But when school comes around I try to shift my sleeping schedule back a half a hour so I'm getting up at 7 and going to sleep at 9:30. However, I have been staying up pretty late just because I couldn't go to sleep. Now I know its because I always read a hour before I go to bed. But the book is usually on my phone and so the light from the electronic is faking my body out. My body thinks it is light out and so the meletonin isn't being released.
Phones at bedtime are becoming a real problem! As you say, the light reduces melatonin production, which makes it more difficult to fall asleep. Now that you know this will you change your habit of reading on your phone before bed?
I read the article "Are Chemicals Getting A Bad Rap?". What I learned from it that people often make the mistake by saying that all chemicals are bad, or cause cancer. If that were the case everyone would have cancer or be sick often, which is not it at all. Yes some chemicals can cause cancer or make us very ill, but like what it said in the article that we also use chemicals to treat our sicknesses. We are all made up of chemicals because it is what make us,us. Chemicals, which can also be known as substances, are nothing more that compounds, elements, and mixtures and makes up a lot of what is around us. We eat, drink, and breathe chemicals everyday. Another big mistake most people make is the meaning of the word natural, as in natural chemicals. We cannot be fooled by this meaning because natural chemicals can be just as dangerous as compound or mixed chemicals. It is important to know your chemicals and distinguish the good from the bad and be more educated so you know what substances you are dealing with.
This is an interesting conversation to have! Dihydrogen Monoxide...sounds scary, right? Causes drowning, intoxication, etc. etc. (It's just water...H20)
I read the article ¨Fermentable Foods: Trouble in your diets¨. I really found this article interesting not only because of the content but also because I could really relate to the girl that was talked about in the article. Sarah was a high school athlete that had a diet when she was in season but somehow during her diet she started feeling gassy and sometimes constipated. I've been dealing with the same issues lately, so reading this really brought up even more questions. Sarah had heard from a friend that it could be because of the glucose that came from the food she was eating so she changed her diet. But even when she changed was she was eating, she started experiencing different symptoms like diarrhea. So she went to the doctor and he told her she had FODMAPs which is a disease that is an irritable bowl syndrome and the doctor told her to reduce her intake of food containing a range of compounds. Now I know what to ask the doctor when I go in and see if I could be having the same troubles like Sarah had. Maybe by knowing if I have this disease it could help me not be so uncomfortable in school or even in practice.
There are a lot of conditions that can cause GI symptoms. It could be something as simple as drinking more water, not getting enough (or too much) fiber, or eating too many gas causing foods like beans or broccoli. Make yourself a guinea pig and see if you can figure out which food(s) are causing you to feel bad!
I already knew that the more calories we eat over our limit, the more fat we gain. Also the extra calories that we consume are stored as fat in our body. Other people have a faster metabolism than others. Having a fast metabolism means that you can break down food faster than those who have a slow metabolism which take a longer time breaking down the foods that they consume. That is why some people with a slow metabolism are careful and watch what they eat so that they don't end up gaining extra weight they don't need.
There is a chart the recommends the certain amount of calories that we take in and the suggested weight of individuals. I can honestly say at my age I'm a little over the suggested weight. I have gained weight which means that i have been consuming more than i should of calories. I do exercise but apparently not enough. I watch what i eat but I don't have a fast metabolism so it's harder for me to lose weight honestly. We are told how much calories to consume but how are we supposed to keep track of the calories at a moment when we are really hungry and don't care how much calories it has.
I read the article "The Big Reveal: What’s Behind Nutrition Labels"
A problem most of face at some point in our lives! When you're really hungry try getting into the habit of snacking on high protein, lower sugar foods. Also pay attention to the type of sugar you're eating. Is it natural sugar, like that found in fruits, or is it junk sugar (which can cause weight gain for reasons other than it's calorie content)
Teeth whitening is very common and can be very effective but can also be very expensive it can be anywhere from $650 to just the cost of fruit. you can whiten your teeth by eating an apple. Things that can yellow your teeth are coffee, tea, and cola drinks is just a few. Bleach can help whiten your teeth but can also ruin your gums. One thing commonly used is hydrogen peroxide some people think it is dangerous but 3.6% peroxide is just fine for your teeth.
Apples...I wonder how that works! Did the article explain in any detail?
The article I read was called "24 Hours: Your Food on the Move!" It is in the February 2012 magazine. In this article it talks about the human digestive system. It takes you through the steps of the digestive system. First, it talks about ingestion, which is putting the food into your mouth. Then, it talks about the digestion process (the breaking down of food). Next, it talks about absorption, where anything of value is extracted and passed through the rest of your body. Finally, it talks about elimination, whatever is left over becomes waste.
Did you know that the smell, sight, or even the thought of food can increase salivation? I learned that your saliva is made up of water (98%), mucus, and digestive enzymes. Enzymes are like a cousin to catalysts. I found it interesting, that waste spends about 12 hours in your large intestine before it is ejected. I also learned that that combination of acid and enzymes is called gastric juice. I think it's cool that our bodies produce 2-3 liters of gastric juice daily. This article ends by saying that the digestive system is probably the best example of chemistry in action that you will ever experience, and I couldn't agree more!!
We could spend a whole semester just learning about this one body system! The things we take for granted, eh?
The article that most caught my attention was The Science of Sleep. The reason this article captured my attention was because I know everyone needs sleep and that everyone has trouble getting up in the morning, so I thought it would be interesting to learn about the chemistry of sleep. One of the topics I read that I found fascinating talked about how we have our own internal clocks. At first I didn't think that could be possible, but I was wrong. As I read, I learned that our bodies have cycles called circadian rhythms. What circadian rhythms do is they govern our sleep schedules by releasing a chemical called melatonin that makes us feel drowsy. This chemical lets us know that it is time to sleep. As we sleep, it decreases and makes us feel refreshed in the morning. Learning this has given me a better understanding of how and why we get tired.
Another topic that I found interesting was why it is harder for teens to wake up in the morning and why more schools are opting for later high school start times. I learned that the reason teens have more trouble waking up in the morning because we produce melatonin later in the sleep cycle than adults and children do, which causes us to stay up late and feel tired in the morning. A school in Minneapolis, which has a later start time, found that their students alertness in class has improved and that the rates of depression have decreased. Now the question I ask myself is "Would we have the same results here in Hansen High School as they did in Minneapolis?" I feel it is something that we as a whole should look into.
It would certainly be an interesting experiment, wouldn't it? What time would you suggest starting (and ending) school? I, personally, do my best work from about 11am-11pm. Mornings aren't my favorite (or most productive) time of day...and I'm an adult!
My article was about the Science behind Sleep. There is a chemical in are brain that is produced called Melatonin. Melatonin helps convince our bodies to make us sleepy. At night teens are most likely to stay up late and not get enough sleep which means that the brain is not making enough Melatonin to help us sleep at night. It was stated that teens need at least three hours more sleep than children or adults because we need time for the Melatonin to break down and not be tired in the morning. Also, that if you get the right amount of sleep you can be able to pay attention more, and learn better. I thought that this was interesting because, I love sleep and had no idea that there were chemicals in my brain that made me tired. And it makes me want to get more sleep for myself so I can learn better.
Do you agree with Marie that school should be started later in the day?
The article I read was about saturated sugars that from various types of candies. The sugar forms differently when the sugar cools slowly or cools fast. The different amounts of time gives sugar more time for the molecules to separate to form hard candy. The shorter the time, the more the molecules stay condensed in one space.
Also to make different types of candies, you have a different ratio of sugar and water. The harder the candy, the more sugar you have to have.
There's a whole field of study out there called Food Chemistry. It's fascinating stuff!!