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Rhizocticin A, an antifungal phosphono-oligopeptide of Bacillus subtilis ATCC 6633: biological properties
Rhizocticin A, the main component of the antifungal, hydrophilic phosphono-oligopeptides of Bacillus subtilis ATCC 6633, was used for sensitivity testing and experiments into the molecular mechanism…
Comparative investigation of human stratum corneum ceramides
The results demonstrate the benefit of LC/MS analysis for selective identification of human SC ceramides and the combination of HPTLC for pre-separation andLC/MS for identification of lipids is an even more powerful tool for detailed ceramide analysis.
Improved sample preparation for MALDI–MSI of endogenous compounds in skin tissue sections and mapping of exogenous active compounds subsequent to ex-vivo skin penetration
- B. Enthaler, Julia K Pruns, S. Wessel, C. Rapp, M. Fischer, K. Wittern
- Chemistry, MedicineAnalytical and Bioanalytical Chemistry
MALDI-MSI imaging of an exogenous model compound, Nile red, was performed directly in skin tissue sections after ex-vivo penetration into porcine skin, enabling determination of the pathway and depth of penetration.
A new member of the class of antibiotics with thiotetronic acid structure isolated from Streptomyces olivaceus Tü 3010
A lipophilic antibiotic was isolated from the culture filtrate of Streptomuces olivaceus Tu 3010. Its structure was elucidated spectroscopically using 2D-1H- and 13C-NMR experiments (e. g. COLOC,…
Characterization of low molecular weight hydrocarbon oligomers by laser desorption/ionization time-of-flight mass spectrometry using a solvent-free sample preparation method.
- Julia K Pruns, J. Vietzke, M. Strassner, C. Rapp, U. Hintze, W. König
- Chemistry, MedicineRapid communications in mass spectrometry : RCM
- 15 February 2002
Experiments show that spectral quality can be enhanced by dispersing AgTFA directly in liquid paraffins without the use of additional solvents, and provides sufficiently reproducible spectra that peak area ratios between mono- and bicyclic alkane peaks indicated variations in the cycloalkane content of paraffin samples.
A novel sampling method for identification of endogenous skin surface compounds by use of DART-MS and MALDI-MS.
- A. Mess, B. Enthaler, M. Fischer, C. Rapp, Julia K Pruns, J. Vietzke
- Chemistry, MedicineTalanta
- 15 January 2013
This short communication is focused on the analysis of small molecules, e.g. natural moisturizing factor components and lipids, using a novel sampling method with DIP-it samplers for non-invasive examination of the human skin surface, and shows an interesting comparison of MS techniques for determination of skin surface compounds.
Characterization of paraffin oils and petrolatum using LDI-TOF MS and principle component analysis
Laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF MS) followed by evaluation of the mass spectra with principal component analysis (PCA) was used for the in-depth characterization…
Determination of green-tea catechins in cosmetic formulations and in in-vitro skin extracts by high-performance liquid chromatography coupled with electrospray ionization mass spectrometry
SummaryA simple, rapid and reproducible method is presented for the analysis of green-tea extracts in different cosmetic formulations and in in-vitro skin extracts. Cosmetically active principal…
Rhizocticins - New Phosphono-Oligopeptides with Antifungal Activity.
Qualitative analysis of tackifier resins in pressure sensitive adhesives using direct analysis in real time time-of-flight mass spectrometry.
DART-MS is a rapid and efficient screening method for the analysis of various tackifiers in PSAs and can be performed down to 0.1% using the three most abundant signals for each tackifier.