Germ layer

many people. This was indirectly supported by the fact that high-population density areas with low amounts of sanitation were hot-spots for diseases. Even legendary hospital pioneer, Florence Nightingale believed in Miasma theory. Although replaced by germ theory, this at least attempted to break through to healthier living standards. Many Americans rose up and tried to be more cleanly, this was unfortunately was countered by the Industrial Revolution, and the increase of urban city life, where…

Louis pasteur discover many things, in 1864 he discovers pasteurization. One of the reason why louis pasteur was so important was because he created a process called pasteurization. Pasteurization is process that destroys pathogens in milk, wine, and other food. If we didn't have this process then all of food would go bad, and we wouldn't have anything to eat. It's a simple process that change everything. Pasteurization is a process that kills bacteria with heat. Pasteur made a huge impact on…

truly changed the world. Louis Pasteur is a very influential scientist in history because of his discovery of the germ theory, inventions of the rabies and anthrax vaccines, penicillin,…

married and had 5 children and only 2 survived brain tumor. In 1854 Pasteur became a chemistry professor and dean of the science faculty at the University of Lille. He worked on finding solutions with the manufacture of alcoholic beverages. Then his germ theory he didn’t invent but he convinced people by doing an experiment. The experiment was to boil the liquid and let it cool off. His process was called pasteurization. It was completed or tested on April 20th, 1862. In 1865 he helped prove…

Methods Column chromatography was set up using a 60 ml syringe clamped to a ring stand. The syringe was plugged using a small amount of cotton. An Erlenmeyer flask was placed underneath the column to collect any excess material. Eleven 20 ml vials were labeled numbers 1 through 11. Silica gel was measured to 42 ml using a graduated cylinder and then moved into a 150 ml beaker. A slurry was created by adding 50 ml of hexane to the beaker containing the silica gel. The slurry was stirred for…

When the ink layer on paper is too thin, it is caused by less printing pressure and less amount of ink is transferred. The central position of plate cylinder is moved to change the pressure between the plate cylinder and the blanket cylinder. Center distance between…

prioritizing the continued security of the power grid should be at the top of the list. There are many different options that can improve security levels of both a physical and logical nature, such as disk drive encryption, digital certificates, Transport Layer Security (TLS), and Virtual Private Networks. Recommendation: Implement Full Disk Encryption Full disk encryption is the ability to convert data into unreadable code that can only be deciphered by authorized people. The encryption can…

Introduction Thin-layer chromatography, otherwise referred to as TLC, is a fast and inexpensive way to determine the amount of components in a solution or to identify an unknown compound. The principal behind TLC is when different compounds are placed on silica gel or alumina, (stationary phases) they will travel different distances when eluted with the proper solvent. According to ChemistryGuide, this is because the more polar compound has a stronger interaction with the silica gel due to its…

Investigation 13 “Who Wrote the Ransom Note?” Did The Sticky Bandit Make an Inky Mistake? Introduction: Early Wednesday morning at approximately 6:19 a.m. the widowed Mrs. Regina Butterworth realized when she went to make some syrup that her infamous syrup recipe had been stolen from her secret cookie jar vault. Mrs. Butterworth immediately called the police and upon their arrival they discovered a ransom note left by the alleged sticky bandit. The note was sent to the Tempe CSI Crime Lab…

The purpose of this experiment was to identify the generic name of the unknown drug through thin-layer chromatography analysis. By comparing the Rf values obtained from each TLC plate, it was deduced which components were present in the unknown drug. Through comparison of Table 1 and Table 2, Unknown A was identified as B.C. Tablets. Salicylamide was evident in the unknown substance due to the distinct blue color that was present in both the unknown spot and the salicylamide spot; the similar Rf…