Spectroscopy

new sterilized unlined paint can containing the ACS probe in the headspace, sealed, and heated in an oven at 80 degrees Celsius for 12-16 hours (1). Volatile compounds were extracted from the ACS, and the samples underwent Gas Chromatography-Mass Spectroscopy (GC-MS). Then, Almirall and Fulton administered controlled pyrolysis burning in order to provide a classification standard of what pyrolysis products can be expected at a crime scene under certain conditions. This was achieved by placing a…

One of the most perplexing and frustrating biological enigmas which scientists have been trying to solve for years is how animals from European robins to fruit flies to beluga whales can navigate their way across earth in the proper direction with each change of season. Decades have passed with no concrete evidence of any biological compass evidence found within any of these incredible travelers; theories have only been postulated. Recently, however, some researchers claim they’ve uncovered a…

The great Neil deGrasse Tyson once said something along the lines of humans have only discovered about 4% of the universe. Not only does my fear of what I don't know going on below my feet in the ocean scare the crap out of me, but that big star filled sky does as well. It doesn't just scare me, but it probably scares and excites scientists studying it all over the world. Since we only know a fraction of the inter-workings of the universe, there are many questions and things going on that we…

For a few years all researches have been agreed that the behavior and the human mind, in normal and pathological conditions, are directly related to the function of nervous system. Also psychiatric disorders of affective or cognitive origin are interpreted as the consequence of a particular pathology of the nervous system. Therefore, neuroscience involves all the different branches of psychology that have the suffix “psych”, as for example psychology, psychiatry, psychopathology. All these…

of surface coverage of 2-D clusters with idealized RHEED oscillations. (Adapted from J.R. Arthur, Surface science 500 (2002) 189-217) There are similar in situ surface studies techniques used by means of optics, such as reflectance difference spectroscopy (RDS), which also known as reflectance anisotropy (RAS). This technique measures the difference in reflectance between two orthogonal polarization states of light falling at near-normal incidence on the sample surface[8]. The typical setup of…

The search would be for drugs such as opiates, marijuana, and alcohol. If something shows up in the test, then the sample goes through a more sophisticated test that uses a technique called mass spectroscopy, which can detect the substance by its mass and charge. It also allows the lab to detect smaller amounts of the substance. More complicated tests can detect exactly what the concentration of the substance is. Experts have to determine if the substance…

Personal Statement "How can I help?" is a simple question that we normally either dismiss or greet with lukewarm enthusiasm. In this question though, rests a core intention of trying to be part of the solution. It may not seem important, but the simplest of ideas, motivations or questions can begin most journeys, which is true in my case. I remember that as a young child of around 4 years old, I would sit on the counter next to the medicine cabinet and read the back of all the medicine bottles.…

Kalyani et al (2009) studied an isolated strain of Pseudomonas sp. SUK1 from the waste disposal sites of local textile industries in India, with the objective of evaluate an ecofriendly textile dyes biodegradation. To isolate the microorganism, they first collected a soil sample from the waste disposal site and inoculated the sample in a nutrient medium with a dye. Then they incubated and plated in agar with dye. The colonies that had a halo of decolorization were selected to be submitted to…

Chitin is a linear polysaccharide, with β-(1-4)-linked N-acetyl-D-glucosamine. Found in the exoskeletons of crustaceans (crab, shrimp, lobster, insects) & molluscs, as well as the cell walls of algae and fungi, chitin is the second-most naturally abundant polysaccharide after cellulose [1, 2]. Chitin occurs naturally in the polymorphic forms: α, β and γ. The α-polymorphic form of chitin is the most abundant in nature, present in the strong exoskeleton of crustaceans [6]. α-Chitin forms tightly…

Fig. 2 and Table 1 present the open circuit potential versus time curves and self-corrosion rate of Al, Alloy 1 and Alloy 2 electrodes in 2 M NaCl electrolyte, respectively. Corrosion rates were obtained by weight loss measurements in 2 M NaCl solution after 60 min. As seen in Table 1, the corrosion rate increases in the following order: Al ＜Alloy 1 ＜ Alloy 2. Fig. 2 indicates that open circuit potential of Alloy 1, 2 (especially Alloy2) is more negative than that of Al. It can be seen that the…