Sodium thiosulfate

The use of Chemical Warfare in World War 1 was horrifying as many soldiers would say. Chemical gases were used as a physical weapon as much as a psychological weapon. The first major gas attack happened on January 31, 1915 when over 18,000 tear gas shells rained down on the russian lines but as surprising as it may seem the gas did little to no effect on the russian lines as one soldier said “The results left him disappointed” (Pruszewicz, 2015). Even tho the first gasses weren't that effective…

While gelatin silver prints took Europe by storm in the late 1800's, becoming a favorite pastime for many, today they are not just a sentimental mementos of an era gone by. They provide a well of information about the author as well as the historical context that influenced his work. Their theme, technique, and style speak volumes, allowing a glimpse into the lives of the people in front of the camera as well as behind it. One of such intriguing images is the photograph titled St. George and…

reaction, no color change was negative, however it could take up to an hour to see the color change. SIM test then performed using inoculating needle in semi-solid media contains casein, amino acids, iron-contain compound and sulfur in form of sodium thiosulfate. Inoculated by stabbing technique and incubated for 24 hours, if the organism could reduce sulfur, a black color would be seen. To test for indole production, four or five drops of Kovak’s reagent was added into the cultured, a red…

What is in your stream is very important to know. What runs through your streams will eventually run into creeks and then those creeks will run into the lake. In our case we will be testing Cole Camp Creek which runs into the Lake of the Ozarks. So, whatever pollutants that could be in the creek will eventually end up in Lake of the Ozarks. This paper will be telling what those stream pollutants can do to water systems. Nitrates Nitrate is essential for all living things because it is a…

Despite the practical and informative nature of the Williamson ether synthesis of 2-bromo-4-methoxy-phenoxy benzyl ether. This reaction was not conducted due to an error made in which the initial product was thrown away instead the actual second phase of this synthesis was the Williamson Ether synthesis of 4-methoxy-phenoxy benzyl ether. Figure 4. Williamson Ether Synthesis 4-methoxy-phenoxy benzyl ether ____________________________________¬___ In spite of this outcome there was still much…

Biochemical Unknown I. Introduction Cultural Characteristics or morphology and biochemical tests can be used to identify and classify microorganism. By culturing microorganism in nutrient broth, slants, and on nutrient agar plates, the cultural characteristics or morphology can be determined. In this lab, the test tube 2 was incubated in a nutrient broth. The pigmentation of the tube was yellow. The media for test tube 2 was turbid. There were a few sediment on the bottom of the broth. In…

The cell wall of a bacterial cell has many functions. Not only does it protect the interior of the cell from changes in its environment but it also helps give the cell shape. In bacterial cells, the cell wall helps prevent cytolysis due to an imbalance of water pressure between the inside and the outside of a cell. The cell wall also contributes to the pathogenicity of a species. As explained by our textbook, “the chemical composition of the cell wall helps to differentiate major types of…

Identification of Unknown Carbohydrates Using Various Biochemical Techniques Practical Assessment LO1 Introduction: The experiment conducted involved subjecting six samples of unknown carbohydrates to different methods of identification, this is involved several reagents including Benedict’s reagent, Barfoed’s reagent and iodine solution, these reagents provided the investigation with credible and accurate results as the reagents stated above give good indicative results to the types of…