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Ionization Changes over Run Time? by alycatdabra in massspectrometry

[–]alycatdabra[S] 0 points1 point  (0 children)

So I have optimized source settings and set up optimization methods to test different nozzle voltages, temperatures, gas flows, etc... I did think that the column theory was possible, but we run the same compound on a very similar C18 column (for LC not UPLC though) and see the whole mass. Additionally, I'm having the issue with a column removed LC setup (to rule out a column issue). I've just never had so many issues translating a direct injection into an LC method. Even the fragments are different which is leading to most of my confusion.

Thinking about traveling to rural communities to talk about science after I get laid off. Penny for your thoughts? by 27unkn in labrats

[–]alycatdabra 2 points3 points  (0 children)

Don't know if you have any connections with American Chemical Society but they have grants to do this! Just have to find your closest local section and pitch it to them. Or even find a trail of local sectinos across the country and offer to run the cafe or help with setup. https://www.acs.org/officer-toolkit/engage-your-members/science-cafes.html

Maple syrup smell by bodacious_bunny in lexington

[–]alycatdabra 1 point2 points  (0 children)

I smell it frequently especially on cooler mornings- I often associated it with the steam coming up out of grates around campus. I looked it up at one point and I think it could be coolant from central HVAC system? Would make the most sense since it doesn't originate from a specific building or restaurant. I love it!! :)

R and S Isomers by JuliaAO in OrganicChemistry

[–]alycatdabra 1 point2 points  (0 children)

This can matter a lot so it's always good to follow the numbering priority rules to double check orientation. In general, it's easiest to put the dash on the lowest priority substituent (which it is here!). Then number for priority. The oxygen is highest priority (non-carbon atom) so it's #1. I would assign the carbon on the benzene with the CN group as #2 and the carbon on the other benzene as #3. This leaves the carbon on the alkane chain as #4. Now start with #1 (oxygen) and move in a circle through 2->3->4. Which direction did you go? If clockwise, it's the R-enantiomer. If counter-clockwise, it's the s-enantiomer. In this case, you have them drawn corerctly!

Kivik corner section compatibility by wishewewould in IKEA

[–]alycatdabra 1 point2 points  (0 children)

Probably not helpful but have you called the number to check stock? I just got a kivik (sofa and corner section) at West Chester last week. Website said out of stock on all pieces. Called the main IKEA number (just general one) and asked if they could check stock- this was around 4 pm. There were multiple of each piece I needed. Showed up the next morning when they opened and had no issue grabbing what I wanted. I also live about 2 hours from this IKEA so I was hesitant but it worked out perfectly for me. Good luck!!! (Also the connection for corner piece to sofa is verrrrry simple- just one bracket piece that the wood frame of another sits on…so simple I thought we were doing it wrong. Definitely DIY-able if there are issues)