Porous medium

2 Literature Review 2.1 Porous Materials For the purposes of this report, porous materials is defined as a medium containing voids[2]. The skeletal material is called the matrix and the voids are filled with a fluid (usually air). The physical properties of the materials can be characterised by bulk, macroscopic and microscopic properties. Most of which have an impact on the acoustical performance of the material. Sound energy is lost in porous materials when it is transformed into heat. This is caused by a combination of effects. Firstly, there are losses through the viscous effects between the solid matrix and the fluid when pressure waves causes the fluid to move longitudinally [3]. Secondly, pressure waves causes the skeletal structure…

Speech #1 Edward R. Murrow, a CBS reporter and war correspondent delivered a report from Buchenwald, Germany on April 16, 1945. He delivered this dialect upon seeing the atrocities committed by the Germans towards the Jews. He addresses the American people, describing the scene he had witnessed at this labor camp, which he found the scene to be so unbelievable that he is rendered speechless many times through out his speech. Murrow’s outrage is so apparent through-out his account, that it is…

Videogame’s bad reputation: Disdain for the medium I have seen too many news reports that propose that videogames are a vile, mortifying plague. Videogames are a rather new medium of art and entertainment, and like their predecessors, videogames are the new scapegoat. Certain lobbyists, like the famous Jack Thompson, have argued that videogames are corrupting the youth of America. This, I will argue, is a skewed perception on the medium as a whole, and it is the issue of this paper. I implore…

full of pieces that didn’t make it into the final composition. Kathy sells her art at juried art festivals and a local boutique, as well as online on her website. She may be new to the medium, but her first festival garnered her a “Judge’s Choice” award. Kathy resides in urban Cleveland, Ohio, where she revels in the fact that she is close to art museums and botanical gardens. She is currently taking metal working classes and will soon start a photography class. She can be found at:…

In order to determine the identity of two unknown bacteria, I performed a series of experiments over several days. To begin this process I created a dichotomous key that I utilized as a guide to perform a series of inoculations, while using both selective, and differential media. The series of inoculations eliminated bacterium based on test results until the correct bacteria were both positively identified. On day one of this process I received two bacteria, one labeled 7A and the other…

The objective of this activity was to use the knowledge that we obtained throughout the semester, with the goal to correctly identify two unknown bacteria. Organism number thirteen is Escherichia coli. On the first day, I conducted a gram stain and noticed that the bacteria were pink, meaning that the bacteria are gram negative. I also recognized that the bacteria were rod shaped therefore they were bacillus. I also noticed that the arrangement appeared to be single celled. I also put the…

angustifolia extract, honey and AuNPs against the eight chosen S. aureus isolates (four MRSA+VRSA and four MRSA+VSSA) were analyzed through determination of their minimum inhibitory concentrations (MIC) values, minimum bactericidal concentrations (MBC) values, and MBC/MIC ratio by broth micro-dilution method using 96-well micro-titer plates. To each 50 μL of the antibacterial agent dilution, 50 μL of adjusted bacterial concentration inoculum (5 × 105 CFU/mL) were added in the 96-well micro-titer…

will have a purple butt, and if negative it will have a yellow butt. The Sulfide Indole Motility (SIM) blue cap tube is a semisolid agar and it is also used to determine sulfide production, indole formation and motility in Gram negative bacteria. We will be adding a couple of drops of Kovacs reagent following the incubation of the unknown organism. The indole combines with the reagent and if positive it produces a red layer on top of the medium. If the medium has a hazy growth throughout, then…

Streptomyces and Antibiosis From our group, Group 2, nutrient agar plates inoculated with E. Coli, (Images 1.1,1.2), (Images 2.1,2.2), (Images 3.1,3.2) no antibiotic activity was detected. This could be a result of the putative colonies chosen, not being Streptomyces. All selected colonies were white, or pigmented rink, raised and rough. One (1) and three (3) were inoculated with the putative Streptomyces colonies. Plate 2 was inoculated with the control Streptomyces colony. Although it was…

Stars are complex and giant balls of matter that have many things to understand about. Stars are born of gas and dust and have a life cycle based on their original mass. All stars start out in their main sequence, but the first difference between the mass of stars is when they stop producing energy. The low-mass stars become giant, and the high-mass stars become super giant. For low-mass, the star then becomes a planetary nebula, then finally a white dwarf. High-mass stars become a supernova, a…