Experimental Methods And Methods Of The Study

Purpose: To become familiar with the International System of Units and common laboratory equipment and techniques. To learn how to determine volume, mass, length, and temperature of a wide variety of items. To learn how to calculate density and concentration of dilutions.

The purpose of this particular lab was to experiment and identify the chemical and physical changes throughout the experiment.

Procedure: Using distilled water, premeasured containers and objects determine displacement of fluids and density of objects. Use ice and heat measure temperatures in Celsius, Fahrenheit and Kelvin.

The image above is our chromatogram, you can see at the top the orange bands of a carotene, next are the bands of xanthophylls which are yellow. The next light green bands directly bellow the yellow is chlorophyll a, the darker green bands are chlorophyll b. In order to test absorbance of the chlorophylls they were cut out of this chromatogram submerged into acetone and then used to get an absorption spectrum as seen below.

A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?

5. The degree of precision was to 3 significant figures obtained with the spectrophotometer. The major source of error in our experiment was not calibrating the spectrophotometer with distilled water.

C. An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide.

The Lab One was done on Laboratory Techniques and Measurements. The first experiment with my Lab partner; we got opportunity to experiment how to conduct measurements in length by using metric conversion. We started in cm units and changed into mm by x10, and moving decimal point x1 to right. To find in meter we moved from cm to meter two decimal points to the left or double check our self divided by 100 and all records in data table 1. The second experiment was to measure temperature of how cold and hot tap water can be by using thermometer in Celsius units. From this experiment, gained knowledge that tab water doesn’t boil to 100 Celsius related to containing different

Apparatus: Spectrophotometer (UV-1201), cuvettes, water bath (set at 37°C), 200µl and 1000µl micropipettes and test tube

The absorbance is measured using a Plate reader and a Standard curve is generated. Also, the different types of pipetting techniques are assessed in this Assay.

This entry was posted in Research papers and tagged UV Spectroscopy research paper, UV Spectroscopy research proposal on May 19, 2013.

After exposing the sample to UV radiation the visible band is determine to be at the maximum absorbance, as shown in Figure 1. This absorbance band at 563 nm and 579 nm corresponds to the reaction SP → MC. By monitoring the exponential decay function of MC, we are able to construct a linear fit of the data, as shown in Figure 3, which confirms a first-order decay. The corresponding rate constants were determined from the slope of the fit, and it was found that as we increase [SP] the rate is relatively constant. Further, this reaction was done on different solvents, which includes acetone and cyclohexane. Following Table 2, it seems that with the addition of cyclohexane, the rate of decay of MC is faster. This indicates that due to the non polar

The overall purpose of the lab is to have the students practice designing an experiment, gathering data, and then analyzing that data to form a conclusion using the scientific method. It also served to understand key terms such as hypothesis, dependent variable, and independent variable. The specific objective of this lab is to determine whether certain human body parts experience allometric or isometric growth. Allometric growth defines when certain parts of an organism grow at unequal rates in comparison to its whole, while isometric growth is when all parts of an organism grow at the same rate in comparison to the entire organism. The specific purpose of the lab is to determine whether or not specific human body parts experience allometric or isometric growth by comparing the ratios of height to two specific body parts, in the students’ case the right hand length and head circumference, in students and newborns. The students formulated the tentative answer that if a team of four compared their height to right hand length ratio, as well as, their height to head circumference ratio, to those of a newborn’s, then the students will discover that the right hand and head experience allometric growth in humans.

In order to measure the differences in values and economic outcomes among current Berlin residents, I will use the data from the German Socio-Economic Panel – Remote (GSOEPremote) administered by the German Institute for Economic Research (Schupp, 2017). This panel data consists of surveys administered annually to up to 20’000 respondents, starting in 1984 in West Germany and in 1990 in the East. ZIP-code level data is available for each respondent which I will use to group individuals by their current residence in East or West Berlin. The data is available at a cost for undergraduate research with an appropriate security concept; I have started working on obtaining the data. In GSOEP, the

This project report is certified by the supervisor and approved by the head of department of chemical engineering.