Particle

Problem: At live events, such as concerts, noise levels are extremely high- over 100 decibels. The issue here is that regular, daily conversations are done at about 65 decibels. According to graphs shown in “Classification of Hearing Loss”, this can potentially damage people’s ears severely in the long run and result in hearing loss. It is almost impossible to sue due to the fact that people are endangering their own safety, and even if it were that easy to sue, major companies that host…

drug release in 12 h which slowly decreases over 24 h and to 120 h. The 12 h burst, representing release of the metronidazole initially present at the surface of the ring. During vulcanization insoluble film of rubber entrap the suspended drug particles, this his leads to decrease in penetration of dissolution fluid and leaching out of drug resulting in slow drug release. The drug release…

Within a little over two millenniums, the history of the atomic theory changed multiple times. In the very beginning, Democritus was the very first to propose the existence of the particle (H). The name he would give this particle was atomos. Aristotle believed that each element of the earth; water, air, fire, and earth, would gradually become small every time they were halved. This view held up for about 2,000 years. The next major change within the scientific field that concerned atoms was…

luffa pulp (LP), Pumice particles (PP), clay particles (CP), ceramics particles (CP). An optimized culture medium containing the porous supports (about 10 particle/30 ml medium) was inoculated with one ml of bacterial culture. After 15 days incubation under static condition at 30°C. The biocelluose production and sugar consumption were determined. The results graphically illustrated in Fig 4.11 revealed that adsorption of G. xylinus cells on luffa pulp (LP) and ceramics particles (CP) gave the…

Borealis. The Sun is constantly spraying the solar system with millions of tons of charged particles each minute. The stream of charged particles from the Sun, or solar wind, consists mostly of electrons and protons. Sometimes the Sun is very energetic and violently ejects the particles in a solar flare or coronal mass ejection (CME). In the simplest explanation, aurorae are produced when these charged particles collide with Earth’s magnetic field and spiral down along magnetic field lines where…

Introduction Aspergillus is a saprophytic ubiquitous fungi genus, which includes more than 200 species. This genus have positive and negative impact to human being. Some species of Aspergillus have pharmaceutical applications, but at same time, this genus could be pathogen of respiratory diseases, and also it could synthesys potent carcinogens. The most pathogenic specie of Aspergillus for human is A. fumigatus, which causes a wide range of sickness, depending to the immunological system of…

Therefore, it is right for nations to impose stricter air quality standards. In his article titled “Air pollution-related illness: effects of particles”, Andre Nel reports some of the major causes of air pollution. Nel himself writes, “Unfortunately, the unregulated ultrafine particles are potentially the most dangerous. Ultrafines are the major component in vehicle emissions-the largest source of air pollution in urban areas--and they have the largest surface…

In Earth’s history before the Industrial Revolution, Earth’s climate changed due to natural causes not humans. In most cases, global climate has changed because of differences in sunlight. Tiny movements in Earth’s orbit changed when and where sunlight hits the Earth. Differences in the Sun have increased and decreased the amount of solar energy reaching Earth. Volcanic activity has also, in the past, increased greenhouse gases over millions of years which has contributed to global warming.…

Have you ever wondered what fresh air smells like? Researchers say certain types of chemicals such as black carbon are affecting child birth. Black Carbon becomes a vast problem in the urban areas, usually near motorways, where vehicles are constantly present. Governments are now taking this seriously, due to the growing population. Population growth means more cars, leading to greater car emissions. Also, putting into consideration, the average passenger car emits 4.75 metric tons of carbon…

In convection, warm particles move to a region with substance at a lower temperature and particles transfer heat by colliding with the cooler particles (Sukhatme, 2005). As it collides the warm particles lose heat to become cooler whereas cool particles gain heat to become warmer. This cycle repeats, occurring in circular motion (The Physics Classroom, 2015). An example of this is shown…