Untersuchung von Textilien und Textilrohstoffen

Ohne Zusammenfassung     

Zur Bestimmung des Kohlenstoffs

Ohne Zusammenfassung     

Intense, broadband, pulsed I-R source at the national synchrotron light source

We describe a broadband (1 m–1 mm) synchrotron radiation infrared source, pulsed each 20–180 nseconds and delivering about 10¹⁵ photons/sec/1% bandpass into f10 optics. The source size is diffraction limited. This source is thus 100–1000 times brighter than a 2000°K black body, very stable and capable of being used for calibration.Work supported by the U.S. Department of Energy.     

Antimicrobial Metabolites against Methicillin-Resistant Staphylococcus aureus from the Endophytic Fungus Neofusicoccum australe

Antimicrobial bioassay-guided fractionation of the endophytic fungi Neofusicoccum australe led to the isolation of a new unsymmetrical naphthoquinone dimer, neofusnaphthoquinone B (1), along with four known natural products (2–5). Structure elucidation was conducted by nuclear magnetic resonance (NMR) spectroscopic methods, and the antimicrobial activity of all the natural products was investigated, revealing 1 to be moderately active towards methicillin-resistant Staphylococcus aureus (MRSA) with a minimum inhibitory concentration (MIC) of 16 µg/mL.     

Finite-element analysis of craze deformation

The finite-element method is applied to a craze model in order to estimate surface displacements and stresses of an isolated craze in a thin rectangular plate. The limitation of assuming linear-elastic behavior of the craze fibrils is demonstrated by comparing computed profiles with published experimental ones. Accurate finite-element estimates of craze surface stresses are obtained from the experimental displacement profile. The analysis is extended to the three-dimensional case but the difference between the craze displacements at the surface of the plate and those at midthickness is too small to justify the considerable increase in computer time in comparison with that required for two-dimensional analysis.     

Zur Analyse des Natriumaluminats

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Zur Bestimmung des Glycerins

Ohne Zusammenfassung