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Posts by Meikai
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2021-05-11 at 3:49 AM UTC in Can I get uhhhhFRONT PAGE FLUSH?
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2021-05-11 at 3:49 AM UTC in If a user spams in the mongolvoid is it still spam?Asking the real questions.
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2021-05-11 at 3:48 AM UTC in haha try moving this one to the mongolvoid you fuckHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
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2021-05-10 at 12:38 PM UTC in I think I'm gonna have sex with a black personOFFICIAL BRADLEYB VEVO
JUST RELEASED A NEW SINGLE
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2021-05-09 at 10:34 PM UTC in Why i'm smarter and more intelligent than everyone on this forum
Originally posted by Misguided Russian Hello space NIGGER.
Summoning HTS to help answer the PRESSING QUESTIONS THAT WE ALL HAVE:
Highlight all that is true:
The TOF analysis instrument is:
1) stands for “time of flight”
2) requires a flight tube on the mass spectrometer
3) requires the equation KE=1/2mv2 for determining masses of molecules
4) measures absorbance
5) measures moving average
Examples of random is/are
1) noise caused by a cuvette
2) noise caused by a dirty mirror and lens in a spectrofluorometer
3) Johnson noise
4) Thermal noise
5) Shot noise
In an UV-Vis spectrophotometer equipped with a diode-array detector,
1) scans are performed one wavelength at a time, requiring greater than one minute to complete 200-800 nm scans
2) is equipped with a photomultiplier tube (PMT) for its detector
3) has the grating before the sample
4) has the grating after the sample
5) produced less noise compared to scanning spectrophotometer in our Lab exercise 1.
The following below results in absorbance in the visible region
1) protoporphyrin IX (PPIX)
2) 1,3-pentene
3) sigma to sigma* (sigma star) transitions
4) pi to pi* (pi star) transition
5) chlorophyll
The following is/are true of fluorescence
1) Compared to phosphorescence, it is a long lived emission
2) It is a cold-body emission
3) It involves an excited triplet state which is lower in energy than an excited singlet state
4) It is due to vibrational relaxation to the ground state
5) The fluorescence peak maximum occurs at a higher wavelength relative to the molecule’s absorbance peak
The excited triplet state of a molecule
a. has lower energy compared to the excited singlet state
b. is required for phosphorescence
c. is associated with parallel spin of electrons
d. results from electron spin inversion
e. results in diamagnetism
The following statements are true regarding liquid column chromatographyy.
f. the principle that makes separation work is that the analytes partitions between stationary phase and air phase
g. can be used to concentrate your analyte
h. the analyte moves down the column only when it is in the mobile phase
i. in order to achieve separation of four different compounds, all compounds must have the same partition coefficients
j. in order to achieve separation of four different compounds, each compound must have a different partition coefficient from others
Short/Long Answers
Fill in the blanks please.
The voltage across a 12 (ohm) resistor that is not connected to a power source will not be _______________
and can be described by the equation __________________. This noise is called ______________________.
The spectral output shown below is from _____________________ lamp.
This lamp would have to be combined with a __________________ lamp in order to provide an output from 200nm to 800 nm.
You wish to obtain the absorbance spectrum of a sample that is highly light sensitive, which means that light exposure to the sample results in its degradation. You need to obtain a spectrum from 200 nm to 800 nm. You have a choice between a diode-array, scanning spectrophotometers, and a scanning spectrofluorometer. Which instrument should you choose to obtain the spectrum? Why? You must answer the “why” to obtain full credit.
Your lab partner states that you should use the equation for root mean squared (rms) to measure the noise associated with the baseline spectrum below. Clearly state whether you agree or disagree by circling or highlighting the answer below, and then provide your justification. Failure to provide justification will result in no points.
Use RMS equation DO NOT use RMS equation
Why or why not
An organic molecule possesses two absorption bands (@ 230 and 390 nm), fluorescence bands @ 420 resulting from excitation of 390 nm band, and a phosphorescence band (@ 622nm). Some of these electronic transitions are depicted in the Jablonski’s diagram below. Complete the diagram by drawing the hypothetical absorbance bands, fluorescence bands, and the phosphorescence band on the plot below. Clearly label absorbance bands, fluorescence bands (emission) and phosphorescence band (emission). Denote the wavelengths of these processes by properly labeling the wavelength numbers where appropriate. Be sure to also note the following: Internal conversion, Intersystem crossing, singlet and triplet excited states, vibrational relaxation in the excited states.
A manufacturer of high-end UV-Vis spectrophotometer claims that their instrument produces only random noise in the UV region (250-300nm). You test this by taking 6 air measurements from 250 to 309 nm to determine if the noise is truly random. Based on the spectra provided, is the noise random? Circle the answer YES or NO below.
Also, in order to receive full credit, you must also justify your answer “Yes” or “No”. Use a moving average of 9 in your calculations. Use of any other number for your moving average will result in no credit.
Clearly label your columns and I need to be able to see the equations used.
Only circling the answer below will result in zero points.
YES NO
I try to answer ONE QUESTION, ONE TIME because despite being totally unqualified I was in an inquisitive mood, and all of a sudden I'm the resident know it all asshole who receives summonses to answer questions I'm equally unqualified to answer. I'm saving this post for posterity and maybe one day I'll learn some of the stuff that's being asked but I am a dum dum idiot with no education so... -
2021-05-09 at 6:41 PM UTC in I think I'm gonna have sex with a black personAnd what's the deeeal with black people?
They aren't black.
And they aren't people.
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2021-05-09 at 6:21 PM UTC in How to download every DOS game?
Also check this game out it's really good. -
2021-05-09 at 6:18 PM UTC in How to download every DOS game?And Wolfenstein 3D, I guess.
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2021-05-09 at 6:18 PM UTC in How to download every DOS game?
This is the only DOS game that matters. -
2021-05-08 at 3:26 PM UTC in Would You Get Vaccinated For Free Beer?
Originally posted by Bradley i"d fuck HTS if she had 0 vaccines, a cold sore, and no pants in the room
I'm gonna yell 'TOTSE" and "zoklet" whn i bust.
I mispronounce it as Tote-C & zoke -let
can't think of a way i can mispronounce nigrims in space i will
Alsoo I foorwarded this free beer thing to my mom.
Nigga sin space, the space in which niggas sin. -
2021-05-08 at 8:48 AM UTC in does this work right?
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* \ \__~ ~__\ | *
* \_ \ _.______ .______\| | *
* \ \______// _ ___ _ (_(__> \ | *
* \ . C ___) ______ (_(____> | / *
* /\ | C ____)/ \ (_____> |_/ *
* / /\| C_____) | (___> / \ *
* | ( _C_____)\______/ // _/ / \ *
* | \ |__ \\_________// (__/ | *
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2021-05-08 at 6:29 AM UTC in I care more about Douglas being dead than the original TOTSE OG's...
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2021-05-08 at 12:56 AM UTC in Non-Schizo Thread.aka TheDarkRodent, aka Jeff Hunter.
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2021-05-07 at 11:33 PM UTC in How do I get over my addiction to wanting to help people?Don't snap out of it, that's not the Christian solution. The solution is to just temper your expectations. Offer them advice, don't get upset if they don't follow it. 🤷♀️
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2021-05-07 at 9:52 PM UTC in Breivik Survivor joins Islam
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2021-05-07 at 9:42 PM UTC in Is it BAD to be addicted to a drug?
Originally posted by Xlite You're addicted to o2, so you're gonna quit?
The withdrawals are awful, I really don't blame anyone for not wanting to go through that.
Originally posted by Donald Trump I read the first sentence.
Blame twitter for me not reading the rest.
I'm sure it was deep and woke shit altogether.
Don't worry it was rambling nonsense. -
2021-05-07 at 9:19 PM UTC in Any of you heard of this captivating Japanese sect?
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2021-05-07 at 9:11 PM UTC in Is it BAD to be addicted to a drug?"Yes" but also not really. It's probably some kind of dharmic negative in the sense that addiction/physical dependency is "foreign" and not part of the human experience unless introduced? I get the sense that pluperfect ascendant humanity is probably not addicted to any drugs, but unless you're the Maitreya buddha incarnate it's probably not a huge deal. I don't think it's inherently a "bad" thing outside of that context, but considering that specific context is a part of all the contexts in which that question could be answered... it is obviously not perfectly good or neutral, therefore, it's "bad".
Beyond that, it's more how you feel about it and how you deal with it. For an addict driven to commit a crime he would not have committed were it not for the addiction, addiction is obviously bad. This is not an outcome inherent to addiction though. It's bad if it's negatively impacting your life, and only the person living your life can decide whether or not that's the case. -
2021-05-07 at 8:16 PM UTC in Breivik Survivor joins IslamGood. Faith and community are important. I hope God blesses all of my Christian, jedi, and Muslim brothers and sisters. ✡️✝️☪️
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2021-05-07 at 8:13 PM UTC in Would You Get Vaccinated For Free Beer?No. I should be the last person to get a vaccine, and an incentive to get one actually makes the calculus worse. I don't go outside. I don't like going outside. Going outside is dumb and bad, and I haven't gone - and won't go - outside. Vaccinating me is a waste. Vaccinating me and giving me something for it is a doublewaste.
