Photographic chemicals

Discovered in 1898, the element neon has helped produce a staple of American cities and everyday night life: neon lights. Neon was first proved to exist by William Ramsay and Morris Travers of London, who decided to name the newly discovered element after the Greek word neos, or new. This finding was “vital in proving the existence of isotopes” (McCormick 1). The Periodic Table of Elements shows neon on the farthest right column, meaning it belongs to the noble gas family. As a part of the…

A new, specific, rapid gas chromatography-mass spectrometry (GC-MS) method was described to identify and quantify pregabalin in human plasma. Silylation and acylation reaction were tried for derivatization of pregabalin before GC-MS analysis. Derivatization was achived using N-(tert-butyldimethylsilyl)-N-methyltrifluoroacetamide (MTBSTFA). Identification and quantification of a new derivative were performed in selected ion monitoring mode using electron impact ionization. Pregabalin was…

4. RESULT AND DISCUSSION 4.1 Introduction In this chapter, all the results and analysis in this experiment that have been performed are discussed in detailed. The analysis included characterization and optimization. In addition, the graph and table were prepared to better present the results. 4.2 Extraction Of Jatropha Curcas By Using Soxhlet Extraction Method And Microwave Extraction Method The extraction of Jatropha curcas can be done through many methods such as mechanical extraction,…

of 35.45 amu. It has a melting point of -100.98 degrees Celsius and a boing point of -34.6 degrees Celsius. However, at room temperature it is a gas. Chlorine contains 17 protons and 17 electrons and also contains 18 neutrons. The density of the chemical element Chlorine is 3.214 c/cm3. Like every member of the halogen group, chlorine has a tendency to gain one electron and become a chloride ion. Chlorine…

Sujata Neupane Partner’s name: Samiksha Pathak Aryal Measuring Specific Heat Capacity of Unknown Metal The purpose of this experiment is to identify the unknown sample by calculating its specific heat capacity. 1. Introduction: Heat is a form of energy that is transferred between objects with different temperatures. The amount of heat released or gained by an object (q) depends on the mass of the object (m)…

Based on the experiment, it shows that the bromelain is started stable at 25% of enzyme concentration to 100% of enzyme concentration, pH 4 to 11, and the temperature range from 4oC to 37oC. For the concentration, it could happen because the presence of bromelain could break down the gelatin which makes the not solidified formation of the solution. In the temperature test, the lowest temperature makes the bromelain become optimum temperature which is regarded favorable for the digestive process,…

Exercise's Effects on Cellular Respiration Cellular respiration is a chemical reaction that creates energy through your cells. It requires inhaled oxygen and expels carbon dioxide. This carbon dioxide can be detected through the use of bromothymol blue (BTB), which is a pH indicator solution. When the carbon dioxide is exhaled into the solution, BTB reacts as it would with any other acid, and turns from blue to yellow. The higher the level of carbon dioxide, the more quickly the color changes…

Enzyme Post- lab assignment The purpose of this lab is to see the enzyme activity. We have known that biological chemical reactions are catalyzed by enzymes, so in the experiment 4.1 we tested the properties of catalase, and its presence in potato and sheep blood. The result was we could see the oxygen gas- bubbling by catalase’s presence. Not only that, enzymes are known as reusable, but they are not altered by their reaction with any substrate. In experiment 4.2, we could see that enzymes…

Reagents 2,4-dichlorophenoxyacetic acid (2,4-D) (Sigma-Aldrich), 2,4 dichlorophenol (2,4-DCP) (Sigma-Aldrich), ferric sulfate (nH2O) (Carlo Erba), hydrogen peroxide (H2O2) (Carlo Erba), acetonitrile (Sigma-Aldrich) and Milli-Q water were used to perform all the experiments . All the reagents were used without further purification. Natural groundwater samples Samples were taken from groundwater wells localized in a small rural community (coordinates: 3º21’03.38” N, 76º26’24.51”) near to the…

Calibration 1: Text Cyclohexane is a six carbon cyclic alkane that is unusually stable compared to other cyclic alkanes. This stability can be seen by examining cyclohexane in its chair conformation. Since cyclohexane consists of all sp3 hybridized carbons, it ideally exists with 109.5-degree bond angles. If cyclohexane were planar, it would be forced to have 120-degree angels, and would therefore have angle strain. However, cyclohexane chair conformations are almost completely free of angle…