We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Nobody downloaded yet

Atmospheric-Pressure Plasma - Essay Example

Comments (0)
Summary
The paper “Atmospheric-Pressure Plasma” will discuss a device, which is essential not only for sterilization/disinfection, decomposition of hazardous substances and surface modification but also for exploration and development of new composite fields that are based on multifaceted nanotechnology…
Download full paper
GRAB THE BEST PAPER
Atmospheric-Pressure Plasma
Read TextPreview

Extract of sample
Atmospheric-Pressure Plasma

Download file to see previous pages... However, the mechanism of regeneration of tissues through the short-time plasma exposure has not been explicitly revealed as yet in spite of its increased practical application. In order to improve the situation, it may be important to clarify the mechanism from multilateral standpoints including plasma science and engineering, molecular biology, and biochemistry. Therefore, we conducted a basic experiment on the direct irradiation of cells by using micro-spot atmospheric-pressure plasma source, which is hardly harmful to the living bodies both thermally and electromagnetically. In this experiment, murine fibroblast cell line (NIH3T3), which is usually used for cell experiments, was used and effect of plasma on the culture cells was considered. As a result of the experiment, it was revealed that cell multiplication is activated by plasma exposure. In response to the result, we considered factors related to the multiplication. Although there are many factors involved in the cell multiplication, we particularly focused on neoangiogenesis and NO production, and considered vascular endothelial growth factor (VEGF) and acidic fibroblast growth factor (bFGF). Schematic diagram of the experimental apparatus is shown in Fig 1. The apparatus comprised a coaxial structure with tungsten electrodes employed in a glass capillary (internal diameter of plasma genesis region: 8 mm, internal diameter of the tip: 1 mm) with cylindrical electrodes on the exterior. High voltage for plasma generation was generated by externally-controlled high-voltage power supply device. Plasma generation conditions were: applied voltage: 5-9 kV; frequency: 1-3 kHz; helium (He) gas flow rate: 1 L/min; and plasma exposure time: 1-100 sec. It was found in the earlier studies that NO gas is not generated by this apparatus. In the experiment, a culture containing 1 x 105 murine fibroblast cell lines (NIH3T3) was set in a 12-hole culture vessel. It was cultured for 24 hours in a CO2 incubator (culture conditions: temperature: 37 deg. C and CO2 gas concentration: 5%). The medium was replaced with serum-free medium. The unprocessed specimens (control), those processed with He gas flow and others exposed to plasma were compared. Processing time for each specimen group was 1, 10 and 100 sec, respectively. They were cultured for 24 hours in CO2 incubator after plasma exposure and then cell forms were observed with optical microscope. Afterwards, only live cells of NIH3T3 cell line attached to the bottom face of the culture vessel were peeled off by trypsin treatment and the number of cells under each condition was counted, followed by consideration of multiplication rate changes among the conditions. In addition to that, they were continuously cultured for 7 days in NIH3T3 cell line. Differences in the cell multiplication curves of specimens exposed to plasma for 90 sec per day and those processed with He gas flow were also considered. With this experiment, we considered the effects of plasma exposure on cell multiplication based on both the trends of exposure time-dependent cell multiplication and the effects of plasma exposure on cell multiplication. Fig 2 shows cells exposed to the plasma. Culture medium thickness was 6 mm. Plasma was radiated from capillary of 1 mm diameter to cells adhering to 6 cm2 base area at a flow rate of 1 L/min.  ...Download file to see next pagesRead More
Comments (0)
Click to create a comment
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
High density Plasma CVD
During the process byproducts are also produced which are evolved as gas through the chamber of reaction. CVD is the process which is an essential component of various processes which include the powders, coatings, fibers and monolithic materials. CVD is very versatile process which can produce the metallic as well as non-metallic material of any kind.
10 Pages(2500 words)Research Paper
Atmospheric and Water Quality
Models previous to the Gaussian model did not assume a Gaussian distribution and also did not include the effects due to ground reflection of pollutant plumes. Sir Graham Sutton eventually came through with an air pollutant dispersion model which included the Gaussian distribution for the vertical as well as cross wind dispersion of the plume.
9 Pages(2250 words)Essay
Atmospheric Vortex Engine
Carbon emissions from fossil fuels have been linked as one of the major reasons behind global warming. Alternative energy solutions are being worked on for decades. These are mainly electricity projects, but the ultimate aim is to replace fossil fuel by electric energy. Hybrid cars were just a start and in 2012 production of complete electric cars have started with Tesla introducing their electric vehicles.
3 Pages(750 words)Admission/Application Essay
Plasma Membrane and Diffusion
The cell membrane is mainly composed of the lipid layer embedded with proteins and it’s involved in the following cellular processes: Signaling of the cell, Adhesion of the cell and conductivity of the ions in the cell and it forms the external attachment of cells interior to the extracellular structures.
2 Pages(500 words)Case Study
Atmospheric Chemistry
The ACE-FTS (Fourier Transform Spectrometer) is used for detecting wavelengths of electromagnetic radiation and the MAESTRO (Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation) to measure ozone, nitrogen dioxide and aerosol extinction.
4 Pages(1000 words)Essay
Atmospheric Ozone
Ozone is also called Trioxygen. Ozone was first isolated and named by Christian Friedrich Schobein and Jacques-Louis Soretin. Its name was culled from the Greek word Ozein, which was used to describe the smell from lightning storms. Although it is essential to life, Ozone is a toxic gas and the World Health Organization (WHO) supports studies that claim that human exposure to the gas can lead to certain health effects such as cardiovascular problems and even lead to death.
3 Pages(750 words)Essay
Atmospheric Pollution
This in turn has raised the demand for the development and implementation of effective mitigation plans to address the cause of global warming, primarily attributed to atmospheric
7 Pages(1750 words)Essay
Atmospheric issues
But like any complex system, changes in the ratios of gasses and particulates change the system, often in unforeseen ways. Many scientists feel that this is exactly what is happening to our atmosphere today. Specifically, it appears that the abrupt
7 Pages(1750 words)Term Paper
Plasma International and Blood Plasma Transfusions
In the article above ‘plasma project,” the writer airs his views concerning plasma international’s buying blood for 90cents per pint and selling it to the hospitals at $150 per pint. This is the same blood that at times is freely donated (Von & ebrary, Inc. 2004).The writer views that Plasma international is unethical because the donors give it freely.
2 Pages(500 words)Case Study
Atmospheric Circulation on Venus
Radar imaging exclusively obtained information regarding topography. The principal atmospheric gases are nitrogen and carbon dioxide. Other chemical compounds are available just in trace amounts. The existence of an atmosphere in Venus was first hypothesized by
6 Pages(1500 words)Research Paper
Let us find you another Essay on topic Atmospheric-Pressure Plasma for FREE!
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us