The graph was interesting as the results were not expected. Morning fresh which costs the most was expected to have the largest zone of inhibition but this was not the case. Palmolive has the largest zone of inhibition having an 0.8 cm larger diameter then morning fresh had. It was expected that ultra would have the smallest zone of inhibition as it was the cheapest. The sponges results were also interesting as there was no clearly seen zone of inhibitions that were noticeable enough to be able
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Extract Preparation Several samples of Agaricus bisporus were dissected into their various anatomical components (see Figure 1.) 9.1248 g of the lower stem (S2) was collected and frozen with liquid nitrogen. The frozen sample was ground up and mixed with 28.9 mL ± 0.1 mL of a sodium phosphate buffer (50 mM‚ pH 6.5). The mixture was then transferred into a centrifuge tube and placed in a Beckman Coulter Avanti J-26 XPI high speed centrifuge. The sample was spun at 20‚000 rcf for 20 minutes at 4
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Journal of Bangladesh Academy of Sciences‚ Vol. 35‚ No. 2‚ 203-210‚ 2011 CRYSTALLIZATION OF ZINC SULPHATE SINGLE CRYSTALS AND ITS STRUCTURAL‚ THERMAL AND OPTICAL CHARACTERIZATION J.K. SAHA AND J. PODDER* Department of Physics‚ Bangladesh University of Engineering and Technology‚ Dhaka-1000‚ Bangladesh ABSTRACT Zinc sulphate (ZnSO4.7H 2O)‚ an inorganic material has been crystallized by an isothermal evaporation method. ZnSO 4.7H2O is highly soluble in water and the solubility is found to be increased
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DISCUSSION: Qualitative analysis is used to determine the presence of cations or anions present within a sample and their impurities. Information known‚ such as chemical and physical properties‚ about cations and anions can be used to determine what steps should be used to separate the sample into one‚ specific ion. Qualitative analysis involves forming and decomposing complex ions. Qualitative tests are very sensitive‚ allowing to detect a very small amount present in sample. Due to sensitivity
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Analysis The melting temperature of sodium thiosulfate can be determined by checking our data. Since a substances temperature remains constant while it undergoes a phase change‚ we can see that our sample changed from a sold to a liquid at 46.0°C. This is the temperature of the sample between time periods t1= 130s and t2= 480s. In order to find the Heat of Fusion (∆H Fusion) of sodium thiosulfate we used to calculate how much energy the water bath lost during the sample’s melting period.
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Paragraph 1 The research paper written by Haines et al. concerns the investigation of structural and chemical properties of quartz-type FePO4‚ where observations are made regarding the quartz-type FePO4 at elevated temperatures and during the occurrence of the α- β transition stage. The temperature range that was selected for the investigation was from 294K to 1073K and the investigation was carried out by neutron powder diffraction. The properties of the quartz-type FePO4 was compared to other α-quartz
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Gravimetric Determination of Phosphorus in Fertilizer Samples ------------------------------------------------- Results and Discussion More than 50% of fertilizers are composed of nitrogen‚ phosphorus and potassium because these three nutrients are essential but are deficient in soils. To ensure good quality of fertilizers‚ it is significant that the amounts of these nutrients are quantified. In this light‚ gravimetric principles are of much use. The objective of the experiment is to determine
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Paragraph 1: Temperature; driver for the change of symmetry There are 3 different phases that are observed and each of them are influenced by temperature. In addition‚ in each phase‚ the polymorph exhibits different crystal structures. At room temperature of 298K‚ it will be in phase 3 where it takes the structure of monoclinic-C2/m. When the temperature rises to 396K‚ it undergoes a transition into Phase 2 also known as the high-temperature monoclinic-A2/a phase. At Phase 2‚ the lattice parameters
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Lab Write Up Pre-Lab Questions: 1. What precipitation reaction could be used to separate and remove silver ions from a mixture containing iron (III) and zinc ions? A precipitation reaction that could be used is hydrochloric acid Ag+(aq) + HCl(aq) AgCl(s) +H+(aq) – white. 2. What precipitation reaction could be used to separate and remove iron (III) ions from the remaining mixture containing iron (III) and zinc ions? Fe3+(aq) + 3NaOH(aq) Fe(OH)3(s) + 3Na+(aq) 3. How can the presence of silver
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Sarah Muhs ID: 11325862 Nitration of Methyl Benzoate Post Lab: 1. Is the ester group of your starting material electron donating or withdrawing? Support your conclusion with resonance drawings. The ester group‚ CO2CH3‚ of the starting material was electron withdrawing. 2. Draw the mechanism of the nitronium ion reaction with the methylbenzoate. 3. Why does water stop the reaction? Water stops the reaction because of Le Châtlier’s principle. Since water is a product‚ when more is added it drives
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