"Mpn dilution" Essays and Research Papers

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    Experiment 10

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    Dye Solution 1 2 3 4 5 6 7 8 9 10 Drops of Distilled Water 9 8 7 6 5 4 3 2 1 0 Calculated Concentration 10 12 15 9 7 11 10 18 8 9 Data Table 2: Dilution Test tube Number Solutions Concentration(M) Concentration(ppm) 3 Starting dilution (100 mL water and drops of blue#1 dye) 2 1:1 Dilution (1 part water - 1 part starting dye solution) 1 2:1 Dilution (2 parts water

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    modifications. Firstly‚ the determinations for the standard curve are done in duplicate in large test tubes. Secondly‚ the dilution schemes for the glucose unknown‚ one corn syrup sample and one Gatorade sample are as follow: Glucose Unknown for Standard Curve 100 μg Stock Solution (10‚000 μg/mL) ----------------> 99 mL H2O Table 1. Dilution Scheme of Unknown Glucose Sample % mL of Solution mL of H2O 0 0 5 20 1 4 40 2 3 60 3 2 80 4 1 100 5

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    King B Agar Lab Report

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    Agar and Media Preparation— Agar plates containing King’s B Agar were often used throughout the experiment to support growth of Pseduomonas fluorescens. A recipe was used that included a mixture of 10g Proteose Peptone #3‚ 1.5g Potassium Phosphate Dibasic (K2HPO4)‚ 30ml 50% Glycerol‚ ~965ml water and 20g agar. The mixture‚ post- autoclave‚ was left to cool and 5ml 1M Magnesium Sulfate (MgSO4) was added and created about 40 plates. King’s B Medium was made using the same procedure as the King’s B

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    3.3. Characterization of the S2 VNP loaded liquid SNEDDS 3.3.1. Assessment of self-emulsification efficiency The emulsification time for S2‚ which is the time needed for SNEDDS to form homogeneous transparent mixture upon dilution‚ was 12 sec when 1 gm of VNP SNEDDS was added to 200 ml of 0.1 N HCl. When the same experiment was performed but by using 500 ml distilled water‚ the time required for the complete disappearance of SNEDDS was 14 sec. The emulsification in both media is under grade A of

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    best because a solid medium that provides a surface for the individual cells to be separated and isolated from the other microbial cells that may be present in the original sample. Also the pour is more likely to gain unwanted bacteria through the dilution process. D. What are the six qualities included in a description of colony morphology? 1. Shape: What is the basic formation of the colony? Is it circular‚ irregular‚ or

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    level‚ while sample A5 and A6 had a pH range of 4 (Table 3.1). The pH level for 1M HCl dilutions slightly increased between each sample (Table 3.1). The diluted solutions of 1 M NaOH showed a few unexpected results. The original solution of 1 M NaOH was at a pH level of 11.50 (Table 3.1). However‚ the pH of sample B2 increased to 12.81 (Table 3.1). The remaining samples had a decreasing pH pattern for each dilution step (Table 3.1). Although the pH of B4 was less than the pH levels of B2 and B3‚ it

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    Bacteria Ecology

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    Introduction- This lab experiment serves as a model for community succession using bacterial colonies as the model. A bacterial colony grows from a single bacterium and is composed of millions of cells. Each colony has distinctive colony morphology: size‚ shape‚ color‚ consistency‚ and color. Community succession is a phenomenon observed in the organizational hierarchy of all living organisms. Community succession is not limited to bacterial colonies‚ but spans the entire community of life

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    Commercial Aspirin Lab

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    Commercial Aspirin Tablet Analysis Tuesday Evening Intro: The purpose of this lab was to analyze commercial aspirin tablets. To do so‚ the percent acetylsalicyclic acid (active ingredient) in tablets using acid-base titration was determined‚ the percent acetylsalicyclic acid in tablets by formation of a colored iron(III)-salicylate complex was determined using spectrometry‚ and then the percents from each process was compared. Acetylsalicylic acid is produced when salicylic acid and acetic

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    Lab Jessica Cimaroli Lab 1 Purpose To learn about the International System   of   Units   (SI)   system   and   how   it   relates   to   measurements   in mass‚   length‚   temperature‚   volume‚ and time. To learn about the common  techniques  and  laboratory  equipment  used   to   make   SI measurents. Procedure Length Measurements 1. Gather the metric  ruler‚  CD  or

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    Chap 1 - 5

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    Chapter 1 INTRODUCTION Background of the Study There are lots of herbal plants which are already known for its uses. Binayuyu (Antidesma ghaesembilla Gaertn var. ghaesembilla) is a herbal plant used by B’laan tribes in the southern part of the Philippines. It is said that it can cure stomach ache and helps to lower blood sugar. Artemia is a genus of aquatic crustaceans known as brine shrimp. Artemia‚ the only genus in the family Artemiidae‚ has changed little externally since the Triassic period

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