In our classroom, we performed a lab to evaluate the properties of water. In the first part of the lab, we used a dropper to see how many droplets of water we could drop onto a single penny. It held to just about 30 droplets, forming a large bubble shaped droplet of water sitting atop the penny. The property of water that is being evaluated here is a hydrogen bond. Hydrogen bond keeps the water as a bubble on top of the penny. This is important regarding living organisms because a hydrogen bond is very important when we talk about the replication of DNA.
In the second part of the lab, we placed a single droplet of water onto a piece of wax paper. We then tried to chop it in half, I did manage to chop the droplet in half after several attempts. It creates two individual small, bubblie droplets of water. The property of water that is being evaluated here is cohesion and adhesion. Cohesion is how the particles in water unite together, and adhesion is the attraction between unlike bodies, for example the attraction between the water and the penny.
Wednesday, September 14, 2011
Friday, September 2, 2011
How science works and Biotechnology
In my biology class I went over the normal scientific method, some things that I got out the activity is that in most scientific experiments, repeating the same steps over for new information is necessary and that conclusions are revisable if they are warranted by the evidence.
I did an experiment over how corn with the bug repellent grows worse or better than the regular corn. The independent variable was the bugs, the dependent variable was the corn and the control was the fact that it was the same corn grown. In the experiment you would weigh the corn to see which one was more rich that was grown with or without the bugs. It just went over the basic scientific method procedures and it really let me get the hang of doing experiments and understand which elements are the independent variable, dependent variable, control ect.
In a clinical trail, in my point of view it is basically the control group vs. the group that is being experimented on. The clinical trail activity showed me how experiments are performed on people. In a clinical trial, people have to volunteer. The particular trial I viewed was a double-blind placebo experiment. It was to determine the long term efficacy and safety of asenapine in the schizophrenic patient population. It described how this experiment would prevent relapse after long-term treatment of schizophrenia.
I did an experiment over how corn with the bug repellent grows worse or better than the regular corn. The independent variable was the bugs, the dependent variable was the corn and the control was the fact that it was the same corn grown. In the experiment you would weigh the corn to see which one was more rich that was grown with or without the bugs. It just went over the basic scientific method procedures and it really let me get the hang of doing experiments and understand which elements are the independent variable, dependent variable, control ect.
In a clinical trail, in my point of view it is basically the control group vs. the group that is being experimented on. The clinical trail activity showed me how experiments are performed on people. In a clinical trial, people have to volunteer. The particular trial I viewed was a double-blind placebo experiment. It was to determine the long term efficacy and safety of asenapine in the schizophrenic patient population. It described how this experiment would prevent relapse after long-term treatment of schizophrenia.
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