There are 80 students 15 percent of whom are seniors in the class. The academy started last year after partnering with Anadarko Petroleum Corporation for students interested in all facets of energy development. The students do hands-on examination of wind, solar, and oil and gas development. That includes classroom experiments as well as tours of local oil and gas fields and solar and wind facilities. We wanted our kids exposed to a variety of experts in the industry, said Jackie Kapushion, assistant superintendent for the St. Vrain Valley School District. http://laylatuckerfocus.universitypunjabi.org/2016/12/09/emerging-opportunities-in-straightforward-programs-of-examination-for-gynaecologyThe course work, she said, will prepare students for college studies, technical education, certification programs and the workforce. We want to make sure they dont graduate from high school and wonder whats next, she said. A class recently was analyzing low-level nuclear radiation measurements under the guidance of teacher Will Pratt.
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The atomic vibration energy in graphene’s crystal lattice differs depending on whether it’s in contact with a cancer cell or a normal cell, Berry said, because the cancer cell’s hyperactivity leads to a higher negative charge on its surface and the release of more protons. “The electric field around the cell pushes away electrons in graphene’s electron cloud,” he said, which changes the vibration energy of the carbon atoms. The change in vibration energy can be pinpointed by Raman mapping with a resolution of 300 nanometers, he said, allowing characterization of the activity of a single cell. The study, reported in the journal ACS Applied Materials & Interfaces, looked at cultured human brain cells, comparing normal astrocytes to their cancerous counterpart, the highly malignant brain tumor glioblastoma multiforme. The technique is now being studied in a mouse model of cancer, with results that are “very promising,” Berry said. Experiments with patient biopsies would be further down the road. “Once a patient has brain tumor surgery, we could use this technique to see if the tumor relapses,” Berry said. “For this, we would need a cell sample we could interface with graphene and look to see if cancer cells are still present.” The same technique may also work to differentiate between other types of cells or the activity of cells. “We may be able to use it with bacteria to quickly see if the strain is Gram-positive or Gram-negative,” Berry said. “We may be able to use it to detect sickle cells.” Earlier this year, Berry and other coworkers introduced nanoscale ripples in graphene, causing it to conduct differently in perpendicular directions, useful for electronics. They wrinkled the graphene by draping it over a string of rod-shaped bacteria, then vacuum-shrinking the germs.
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