Grant Larson
P. 2
Mr. Matheiu The origin of cancer cells: could they be from stem cells?
21 October 2013
(http://www.yourekascience.com/Branding_Cancer_Stem_Cells.html)
Summary:
The video above describes the recent discovery of certain stem cells being the producers of the rapid reproducing cancer cells that create tumors in the body. These particular stem cells can copy themselves and produce many more rapidly producing cancer cells. Scientists isolated a protein called DCLK1 found in some normal stem cells, but also primarily in the cancerous intestinal stem cells that produce rapid reproducing cells which lead to intestinal tumors. They conducted an experiment using the cells in the intestines of mice and a blue marker which they used to track the DCLK1 as the cells reproduced. Their goal was to find the origin of the rapid producing cancer cells which could possibly find a more effective therapy that has less of a chance of a reoccurring tumor than chemo. This is because chemo kills the rapidly producing cells, not the stem cells that they originate from.
Relevance:
This subject is related to cell reproduction and cancerous cells/tumors. It is also related to the scientific method. The scientists propose a question, which leads them to form a hypothesis, which in this case was: where do fast reproducing cancer cells come from? which leads to: well, they might come from stem cells. From there, scientists run an experiment and make a series of observations which was the blue dye experiment and observing where the blue dye marker showed up. After they come out with results, they are lead to asking another series of questions like: how can I eliminate the stem cells as a treatment?
Showing posts with label Scientific Method. Show all posts
Showing posts with label Scientific Method. Show all posts
Friday, October 18, 2013
Thursday, October 18, 2012
Antarctic Sea Ice Hits Record...High?
-->
Daniel Stone, National Geographic
October 13, 2012
http://news.nationalgeographic.com/news/2012/10/121013-antarctica-sea-ice-record-high-science-global-warming?source=sailthru
Summary
Despite the current global warming, Scientists report that Antarctica was surrounded by the largest amount of sea ice ever recorded. Antarctica was surrounded by 7.51 million square miles of sea ice when satellites recorded the sea ice. This is surprising because one would expect that as the temperature of the earth increases, the amount of sea ice would decrease. This is happening in the arctic, but differences between the arctic and the antarctic cause the latter to have a slight (~1%) increase in sea ice. One of the biggest differences that factor into sea ice levels is the fact that the entire world is increasing in temperature, but Antarctica is increasing at a slower rate than the rest of the world therefore it is a lot colder than the rest of the world. Another reason that you see sea ice depleting in the arctic and not the antarctic is that the arctic is and ocean that is connected to the rest of the Northern Hemisphere, therefore causing it to have a normal rate of warming therefore causing it to be warmer than Antarctica and loose sea ice easily. Antarctica however, is a continent that is much colder and much more isolated. Therefore its climate is very different from the arctic. Overall this doesn't show good news. Scientists have figured and predicted that Antarctica would follow the arctic, but it doesn't fit with there model. However it still shows that the planet is warming up.
Connection
This article connects with our unit on ecology. It mainly connects with the ideas of global warming that we talked about. When the climate warms there is a loss of sea ice, in this case since the antarctic is cooler than the arctic you don't see that at this moment. Perhaps in the near future, if we don't fix the pollution problem, we will begin to see an decrease in sea ice in Antarctica
Daniel Stone, National Geographic
October 13, 2012
http://news.nationalgeographic.com/news/2012/10/121013-antarctica-sea-ice-record-high-science-global-warming?source=sailthru
Summary
Despite the current global warming, Scientists report that Antarctica was surrounded by the largest amount of sea ice ever recorded. Antarctica was surrounded by 7.51 million square miles of sea ice when satellites recorded the sea ice. This is surprising because one would expect that as the temperature of the earth increases, the amount of sea ice would decrease. This is happening in the arctic, but differences between the arctic and the antarctic cause the latter to have a slight (~1%) increase in sea ice. One of the biggest differences that factor into sea ice levels is the fact that the entire world is increasing in temperature, but Antarctica is increasing at a slower rate than the rest of the world therefore it is a lot colder than the rest of the world. Another reason that you see sea ice depleting in the arctic and not the antarctic is that the arctic is and ocean that is connected to the rest of the Northern Hemisphere, therefore causing it to have a normal rate of warming therefore causing it to be warmer than Antarctica and loose sea ice easily. Antarctica however, is a continent that is much colder and much more isolated. Therefore its climate is very different from the arctic. Overall this doesn't show good news. Scientists have figured and predicted that Antarctica would follow the arctic, but it doesn't fit with there model. However it still shows that the planet is warming up.
 |
| Sea Ice Levels Oct. 13, 2012 |
This article connects with our unit on ecology. It mainly connects with the ideas of global warming that we talked about. When the climate warms there is a loss of sea ice, in this case since the antarctic is cooler than the arctic you don't see that at this moment. Perhaps in the near future, if we don't fix the pollution problem, we will begin to see an decrease in sea ice in Antarctica
Subscribe to:
Posts (Atom)