Irina Oshchepkova
- Total activity 282
- Last activity
- Member since
- Following 0 users
- Followed by 0 users
- Votes 0
- Subscriptions 8
Articles
Recent activity by Irina Oshchepkova-
Spectrus: Evaluating coupling constants (J) from multiplet patterns in NMR spectra
DescriptionCoupling constants (J) provide information about connectivity and spatial relationships (e.g., vicinal vs long‑range couplings). Spectrus can measure J values directly from resolved mult...
-
Spectrus: Assigning and documenting NMR mixture spectra (more than one main component)
DescriptionSome NMR samples contain more than one significant component (e.g., mixtures, formulations, incomplete reactions). Spectrus allows separate structures and assignments to be attached to a...
-
Spectrus: Troubleshooting missing or distorted peaks after NMR data import
DescriptionAfter importing NMR data from vendor formats into Spectrus, some peaks may appear missing, clipped, or distorted compared with the vendor software. Causes include importing the wrong fil...
-
Spectrus: Working with temperature‑dependent NMR spectra (VT NMR)
DescriptionVariable‑temperature (VT) NMR experiments show how spectra change with temperature, revealing dynamic processes (conformational exchange, hydrogen bonding). Spectrus can organize and com...
-
Spectrus: Handling NMR spectra with low signal‑to‑noise ratio
DescriptionLow S/N spectra can make peak picking and integration difficult. Spectrus includes tools (smoothing, zero‑filling, appropriate apodization) to improve the appearance and extract usable i...
-
Spectrus: Using NMR reference libraries to compare spectra
DescriptionSpectrus can store reference NMR spectra for known compounds. Comparing new spectra with library entries helps quickly confirm identity or highlight differences.SolutionBuild or access a...
-
Spectrus: Identifying and annotating impurities in NMR spectra
DescriptionNMR spectra often contain small impurity peaks from side products, solvents, or stabilizers. Properly identifying and annotating these peaks helps distinguish them from analyte signals.S...
-
Spectrus: Correlating IR and NMR data to confirm functional groups
DescriptionIR and NMR provide complementary information about functional groups. Using both in a single Spectrus project helps confirm structural assignments.SolutionImport both IR and NMR spectra ...
-
Spectrus: Handling exchangeable protons (OH, NH) in NMR assignment and integration
DescriptionExchangeable protons (OH, NH) may broaden, shift, or disappear depending on solvent, temperature, and conditions (e.g., D2O exchange). This complicates integration and assignment.Solutio...
-
Spectrus: NMR – Using line broadening and apodization to improve spectral appearance
DescriptionRaw NMR FID data can be processed with different apodization (window) functions and line broadening values. Proper use of these settings can improve signal‑to‑noise ratio and peak appear...