MC Chem Wiki - User contributions [en]

3,3′-Diethylthiatricarbocyanine iodide

2017-02-09T23:02:00Z

Kddyejun: Created page with "By YeJun Park File:3,3′-Diethylthiatricarbocyanine iodide.png http://www.sigmaaldrich.com/catalog/product/aldrich/381306?lang=en&region=US File:Unknown Lamda Max.jp..."

By YeJun Park

[[File:3,3′-Diethylthiatricarbocyanine iodide.png]]

http://www.sigmaaldrich.com/catalog/product/aldrich/381306?lang=en&region=US

[[File:Unknown Lamda Max.jpg|700px|thumb|left|UV-Vis Spectrum of 3,3′-Diethylthiatricarbocyanine iodide]]

File:Unknown Lamda Max.jpg

2017-02-09T23:00:33Z

Kddyejun: Structure of 3,3′-Diethylthiatricarbocyanine iodide

Structure of 3,3′-Diethylthiatricarbocyanine iodide

File:3,3′-Diethylthiatricarbocyanine iodide.png

2017-02-09T22:49:53Z

Kddyejun: Structure of 3,3′-Diethylthiatricarbocyanine iodide

Structure of 3,3′-Diethylthiatricarbocyanine iodide

Submerge Christmas light in liquid nitrogen

2017-01-26T23:54:34Z

Kddyejun:

by Yejun Park (Chem 322, Spring 2017)

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength. As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

Here is a link which might give you a better explanation, http://www.physics-astronomy.com/2014/06/watch-led-light-change-color-in-liquid.html#.WIqLmlMrKUl

If you still have doubt, take Inorganic class!

Submerge Christmas light in liquid nitrogen

2017-01-26T23:53:34Z

Kddyejun:

by Yejun Park (Chem 322, Spring 2017)

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

Here is a link which might give you a better explanation, http://www.physics-astronomy.com/2014/06/watch-led-light-change-color-in-liquid.html#.WIqLmlMrKUl

If you still have doubt, take Inorganic class!

Submerge Christmas light in liquid nitrogen

2017-01-26T23:51:26Z

Kddyejun:

by Yejun Park (Chem 322, Spring 2017)

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

Here is a link which might give you a better explanation, http://io9.gizmodo.com/watch-an-led-light-change-color-in-liquid-nitrogen-1574982405

If you still have doubt, take Inorganic class!

Submerge Christmas light in liquid nitrogen

2017-01-26T23:47:06Z

Kddyejun:

by Yejun Park (Chem 322, Spring 2017)

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

Submerge Christmas light in liquid nitrogen

2017-01-26T23:46:45Z

Kddyejun:

by Yejun Park (Chem 322, Spring 2017)

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]

Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

Submerge Christmas light in liquid nitrogen

2017-01-26T23:31:52Z

Kddyejun: Created page with " Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them i..."

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure, the change in color of light we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen]]

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

File:Wavelength change.jpg

2017-01-26T23:18:33Z

Kddyejun:

File:Fluorescence pic.jpg

2017-01-26T23:16:25Z

Kddyejun:

File:Wavelength-nm.jpg

2017-01-26T23:08:16Z

Kddyejun:

YeJun Park Chem430 S17

2017-01-20T21:13:36Z

Kddyejun: Created page with "Chemistry Research 430 :Spring 2016 :YeJun Park :Senior Chemistry Major ==Research Times== Wednesday 2-5 pm Friday 3-4pm : section 01 = 0.25 credit = 4 hours per week. ==Pro..."

Chemistry Research 430
:Spring 2016
:YeJun Park
:Senior Chemistry Major

==Research Times==
Wednesday 2-5 pm
Friday 3-4pm
: section 01 = 0.25 credit = 4 hours per week.

==Proposed Research Project==
===Enter Project Title here===

===General Information===
:Advisor: Audra Sostarecz
:Other research student collaborators: here
:Other Research Collaborators: here

===Proposal===

===Instruments to be used===

-Langmuir-Blodgett Trough

===References (2 minimum)===

===Research pledge===
I, YeJun Park, have read the Chem/Bioc 430 course syllabus and understand the general structure and expectations of the research program. The above material was prepared after consultation, and in conjunction with my research advisor.

==Written Report==

...from the course syllabus...

[https://www.acs.org/content/dam/acsorg/about/governance/committees/training/acsapproved/degreeprogram/preparing-a-research-report.pdf ACS Guide to Research Reports]

:''Research students are expected to write a report and submit it to the research coordinator by the last day of regular semester classes. These reports are intended to summarize the data collected over the course of the semester. Since this research course requires you to enroll in at least two semesters of research, two reports will be generated. The first semester report should be considered a work in progress, where as the final report should be a more comprehensive summary of your research project. These reports are necessary since several researchers may work on each project. The report will be organized so that it is clear what material is new and what material is review. When available, research students will be provided with an electronic copy of the latest report on their project. The research student is expected to update and improve the introduction, background, and literature sections with each report. Results that challenge earlier conclusions will be justified in a discussion section. Reports will be submitted in both electronic and hard copy to the Faculty Research Advisor AND Research Coordinator.''

===1. Descriptive information===
A project title, the names of the researcher (past and current), faculty research advisor, and other relevant student researchers and/or collaborators, the name and page numbers of the lab notebook(s) where the research is described, the dates when the work was done, and the names of the document file and its immediate precursor.

Example:

'''Detection of Radical Intermediate generated from the MAO enzymatic system.'''

Styles Bitchly*, Donald Hump, Penn Mickey, and Bradley E. Sturgeon#

*lead author, #research advisor

Research work documented in lab notebooks, SB_01 pages 1-25.

===2. Introduction===
State of the motivation for the project of interest in terms of current literature. When we make reference to current literature, this is where you provide specific reference(s) to this work. This section can be largely copied from an earlier report(s), if they exist, but it is expected that this section is edited to include newly found background information. Note: if the author of previous report(s) is included as a contributor to the project, you may cut and paste text; this is not plagiarism, it is collaboration.

===3. Background from earlier reports===
This section will summarize the work reported in earlier reports. If significant results were presented in the most recent report, these results will be summarized and in most cases can be added to that reports background section. This section is included mainly to confirm the current students overall understanding of the project.

===4. Experimental===
This section describes experiments done during the period covered by the report. Usually, this work will be similar or identical to that described in the prior report, if they exists. Any new experiments will be written up and added to the experimental section. Any experiments preformed under identical conditions need only reference previous reports.

:''Example:''

::'''Reagents''': ''List reagents used by product number and the source''.

::'''Enzyme Reactions''': All enzyme reactions were done using a totlal volume of 5.0 mL. Substrate concentration ranged between 1-12 mM. Reactions were initiated be the addition of enzyme.

::'''HPLC''': HPLC data was collected using the Waters Breeze HPLC with a C18 column (insert specs here). Specific HPLC conditions are given in the figure captions.

::'''UV-Vis''': UV-Vis data was collected using the HP 5832 UV-Vis spectrometer using a quartz cuvette. Sample concentrations were adjusted so as to not exceed 1.0 absorbance unit. Significant data was exported in the ".CSV" format and then worked up in Igor.

===5. Results===
This section documents the results of the experiments done during the period covered by the report. Tabulation of data is encouraged; representative spectra presented.

===6. Discussion===
In this section, the student will discuss the results of their work in context of the literature and the results of earlier reports. Questions that have been raised in earlier reports may be addressed here.

===7. Conclusions===
Restate the findings of this period of research. The statement “No conclusions have been reached,” is an acceptable statement.

===8. Future Directions===
In this section, the student will discuss possible experiments intended to address unanswered questions or technical problems on the project.

===9. Literature references===
Literature referenced in the report will be cited. This will be copied from the earlier report, and the student is expected to contribute to the accumulation of relevant literature. Remember that all cited literature must be read.

===10. Signature===
Two copies of the report will be signed and dated and turned in to the Faculty Research Advisor and archived by the Research Coordinator.

Hand in hot and cold water

2016-09-22T22:34:59Z

Kddyejun:

These pictures are thermal images of my right hand in hot water and ice water.
First picture is taken while I was putting my hand in hot water and the second picture was taken when I put my hand inside of ice cold water for about 30s seconds.
The darker color implies the colder and the brighter color implies the hotter temperature. When my hand was in hot water, the hand turned to white in thermal image. And when my hand was in cold water the hand turn to black whereas my body temperature was still high and showing red and white color in thermal image.

[[File:Park 2.jpg]]

[[File:Park 1.jpg]]

File:Park 2.jpg

2016-09-22T22:30:08Z

Kddyejun:

File:Park 1.jpg

2016-09-22T22:29:46Z

Kddyejun:

Hand in hot and cold water

2016-09-22T22:19:16Z

Kddyejun: Created page with "These pictures are thermal images of my right hand in hot water and holding ice. The darker color implies the colder and the brighter color implies the hotter temperature."

These pictures are thermal images of my right hand in hot water and holding ice. The darker color implies the colder and the brighter color implies the hotter temperature.

YeJun Park Chem430 F16

2016-09-06T16:15:03Z

Kddyejun: Created page with "Chemistry/Biochemistry Research 430 :Fall 2016 :YeJun Park :Senior Chemistry Major ==Research Times== Tuesday 2-5pm/ Research Meeting on Friday after Sci.Sem : section 01 = 0..."

Chemistry/Biochemistry Research 430
:Fall 2016
:YeJun Park
:Senior Chemistry Major

==Research Times==
Tuesday 2-5pm/ Research Meeting on Friday after Sci.Sem
: section 01 = 0.25 credit = 4 hours per week.

==Proposed Research Project==
The mechanism behind the antibacterial properties of hop acid investigated with model cell membranes.

===General Information===
:Advisor(s): Audra Sostarecz, Micheal Prinsell
:Other research student collaborators: here
:Other Research Collaborators: here

===Proposal===

In summer 2014, I figured that hop acids have some sort of antibacterial ability by disturbing model membrane system.

However, this research was done by the standard hop extract which is mixture of alpha and beta acids.

For this time, based on what Andrea's research from last year. I will be able to alpha and beta acids separately and test which one actually has the antibacterial properties.

To get alpha and beta acid. I will ask help to Micheal whether or not I can get a collaborator, otherwise I will just follow what Andrea did last year based on her notes.

If I get a collaborator, I will focus on getting Langmuir Monolayer Isotherms with different hop acids.

===Instruments to be used===

Langmuir Trough

===References (2 minimum)===

Et.al. Marjan Ban Cleemput(Journal of Natural Products, Vol. 72, 2009, No. 6)
Et.al. Luke A. Clifton(J. R. Soc. Interface, 2013 10)

===Research pledge===
I, YeJun Park, have read the Chem/Bioc 430 course syllabus and understand the general structure and expectations of the research program. The above material was prepared after consultation, and in conjunction with my research advisor.