Sunday, January 31, 2010
Article Summary #4
The big question is do prions- misfolded versions of healthy protein linked to mad cow and other neurological diseases- infect and cause disease all on their own? Five years ago was when the first major evidence that prions act alone. Prusiner, a biochemist, injected the brains of mice with prions, and the mice came down with neurological disease. There were limitations, though, that the mice took more than a year to become ill and had been bred to produce large amounts of the prion protein. This raised questions to whether they were prone to prion disease anyway.
A biochemist at Ohio State University in Columbus fixed the two problems by coaxing prions to misfold like he believes they do naturally. Instead of misfolding the healthy protein, they combined the healthy protein with blends of lipids. With this, 15 mice brains were injected, and within 130 day, all of the mice looked like the prion disease (their heads twitched, they lost muscle tissue, and became lazy). The mice died several months later. To prove it was prion disease, Ma conducted many tests. Will this information be enough to convince skeptics?
Article Summary #3
Six million light years away, astronomers have spotted a star size black hole that has a mass that is 20 times that of the sun. The discovery was made using the Very Large Telescope facility on Mount Paranal in Chile. A professor from Sheffield University said that for the amount of time that it will take the light to reach us, the star will have blown up in a supernova to produce its own black hole. If one was to be at the system right now, they would find a pair of black holes spiraling around each other. Black holes are said to come in two sizes: the super massive size and the stellar sized one. The super massive one is huge and weighs a million to a billion times the mass of the sun. The stellar size one could only be ten times the mass of the sun, and made when big stars exhaust their nuclear fuel and collapse. This new discovery is found to be in the stellar size category.
The companion is something astronomers call a Wolf-Rayet star, a giant, hot, highly-evolved star that is billowing gas into space. A lot of this material is being pulled into the black hole and assuming the Wolf-Rayet arrives at the expected time, then the system will have the two black holes grow together. Merging black holes are considered one of the most promising targets for the experiments.
#7 List of Research Questions/Problems
-Does it actually work?
-Would it do more harm for the body than good?
-Does the hot and cold together really pump out the inflammation?
-What would be a “good” time to have the body part in each bath?
Electrical Stimulation
-Does it really help with pain, or is it a placebo effect?
-If it does help with pain, is it helping the injury itself?
-Does it help in re-educating the muscle when the muscle is hypotrophic?
-Is it effective?
Stretching and injury prevention
-Does stretching prevent injuries?
-Do other factors for injury include being tackled, irregular fields, weak muscles, loose tendons and ligaments?
-Would previous injuries factor into if stretching will help? Or compliance?
-How often do you stretch for it to be effective? Once? More?
-How long do you stretch for it to be effective?
#6 Refined List of Research Topics
2. Electrical stimulation- Electrical stimulation is used in athletic training rooms along with physical therapy clinics. The idea of e-stim is to send an electrical pulse through your body blocking the pain signals from going from the site of pain to your brain. A lot of patients have it in their mind that its actually healing them, research is still unsure of it.
3. Pilates and back pain- Pilates is an exercise routine done to help the core muscles of the body. It is believed that it could help with back pain. I believe it some what because of the position they call “imprinting”. This position is used at physical therapy for patients with back pain. The position is to guard your back from being stressed by closing the arch of your back into the ground. Also, most times the reason why people have low back pain is because their abs need to be tightened. Doing pilates will help strengthen those muscles and therefore help the back pain.
#5 List of Research Topics
2. Technological advances in emergency patient care
3. Does Electrical stimulation work, or is it a placebo effect?
4. Does muscle weigh more than fat
5. Yoga and weight loss
6. Pilates and back pain
7. Does stretching prevent injuries?
#4 Current Major and Career Goals
#3 One significant Person or Significant Event freewrites and expand it
#2B Three Significant Events
The second significant event happened the summer after I graduated high school. I got my first job working at a daycare for kids with autism. I was a junior therapist, which I thought was a pretty awesome job. I worked 4 hours a day, and I helped the therapists with the kids when they went on outings, or field trips. This was significant to me because I saw how rewarding it was to see a child improve over the course of three months. Every summer after that I came back and worked there as a therapist, each summer getting better and better, more rewarding. This is when I started to think that I could do this as a career: teach special education during the day, and after school do athletic training.
The third event happened not too long ago. Still stuck on what I really wanted to do for the rest of my life, I attended a summer intern program at Temple University for podiatry. It was a week long program, including lectures, shadowing podiatrist, and hands on workshops. This workshop was really fun and lead me to believe I could go to medical school and get a specialty in podiatry. After this program, I asked if I could shadow a podiatrist for the rest of the summer. I liked shadowing, but at the end of the summer I realized that its not quite what I want to do for the rest of my life. So the search continues…
#2A Three Significant People
Saturday, January 30, 2010
#1 Earliest Memory
Science Article Summary 2
Carnations, an exotic tropical plant, can be found in a bouquet at the grocery store, especially around Valentine’s Day (hint hint fellas). There has been recent research shown that reveals the flower’s rapidly growing 300 species, many which arose in Europe. It was a surprise to biologists because when something grows at a fast pace, they usually think of exotic places. Europe seemed out of place in this nature because it’s more of a “boring” place. That was until Europe was found to have an unusually high number of carnation species, nearly one third of the world’s varieties. Two years were spent collecting DNA from Dianthus, a carnation genus. Researchers calculated that the genus is as old as 7 million years, and Europe seems to be the hot spot. It’s not sure why the carnations were suddenly booming, but might coincide with climate shift that happened two million years ago. During this, the once humid Mediterranean Basin dried out, created winters to be mild and rainy, summers to be hot and dry, and was thought that while other plant species died out, Dianthus already had some of the traits that helped it grow in that type of climate. An expert in botany explains about the study that “this is a novel finding for European flora…the painstaking task of recreating evolutionary family trees for genera with large numbers of species is well worth the effort.”
Sunday, January 24, 2010
Science Article Summary 1
Doberman pincshers curl up in a ball and suck their flanks for hours at a time. Researchers studied these dogs and seemed to find a gene that is shared with humans. In people, there is an estimate of 2.5 to 8 percent to have the obsessive- compulsive disorder. Characteristics show things like excessive hand washing, repetitive checking of stoves, locks and lights, and damaging actions like pulling their hair out and self confliction. Dr. Dodman and his colleagues searched for a source of this behavior in dogs, and compared the genomes of 94 Doberman pinschers that sucked their flanks or blankets. Dodman also studied pedigrees of all dogs for patterns of inheritance. A spot was found on chromosome 7 that showed variation in the genetic code when the sucking and non sucking dogs were compared. A protein called cadherins were involved in the cell alignment, adhesion and signaling which contained the instructions for sucking. Cadherins were also recently associated with autism which includes the repetitive and compulsive behaviors. Scientists are now working on finding and sequencing the gene in humans to see whether it is linked to obsessive compulsive behavior. As scientists learn more about the causes of this condition, they will increase using the term obsessive compulsive disorder to apply to not only humans, but animals too. Dr. Karen Overall, a veterinarian specializing in animal behavior, suggested that up to 8 percent of dogs in the United States show compulsive behaviors like fence running, pacing, spinning, tail chasing, licking, chewing, and barking. Males outnumber females three to one in dogs, and could be treated, if early enough. Geneticists say that because of the detailed pedigree and their similarity to those of humans, dogs make a good model for studying human behaviors and pathologies.