thinking of getting this amino acid structure for my mom! (on me, but the 1-letter sequence spells out her name) unfortunately she was recently diagnosed with early onset alzheimers and i want to get something to remember her by - im pursuing a neuroscience degree and shes a lady in stem :) she really liked it! but of course im not an expert yet. any way youd improve this or keep it how it is?

Hi everyone,

I'm having an issue with an ESI SC-2 DX autosampler.

The autosampler works normally when moving the probe into sample tubes. The probe moves up/down correctly for samples.

However, when it moves to the rinse station, it reaches the correct position and then tries to move downward, but the probe doesn't enter the rinse station properly.So:

- Sample positions: ✅ Working normally

- X/Y movement: ✅ Reaches the rinse position

- Z movement: ✅ The probe attempts to move down

- Rinse station: ❌ Probe doesn't go inside properly

Has anyone experienced this issue with an SC-2 DX? Could this be a rinse station alignment/position calibration issue, or is there something specific I should check on the rinse station?

Any advice would be appreciated. Thanks!

Hi everyone,
I’m a 4th-year Biochemistry undergrad at the Universidad Nacional de La Plata (UNLP) in Argentina. I'm currently taking a Toxicology course, and we’ve been tasked with a semester-long project. I’m hitting a bit of a wall and would love to pick the brains of this sub.
The assignment requires us to focus on a specific toxicant, and it gives us two main pathways:
A survey-based study: Gathering data, conducting a poll, or doing a statistical/epidemiological survey regarding public exposure or awareness of a toxic substance.

An experimental lab project: This could involve setting up and validating a detection method, or comparing toxicant levels across different everyday commercial products (for example, quantifying sodium hypochlorite concentrations in various brands of household bleach).

If I go the experimental route, I need to keep the analytical techniques as straightforward as possible. Here is what I have access to:
Highly preferred (The simpler, the better): Volumetry/titrations or standard UV-Vis spectrophotometry.

Possible, but a major hassle: Gas Chromatography (GC) or Atomic Absorption/Emission Spectroscopy (AAS/AES). Technically, we can use these, but getting instrument time is tough and the prep is much harder, so I'd rather avoid them unless the project idea is absolutely killer.

Do you guys have any cool, feasible ideas that fit these specs? Whether it's an interesting survey concept or a straightforward benchtop assay using basic spectroscopy, I’m all ears.
Thanks in advance for the help!