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Alena Juríková Kornel Csach Jozef Miškuf Václav Ocelík 《Central European Journal of Physics》2007,5(2):177-187
Creep strain recovery and structural relaxation of the amorphous metallic glass Fe40Ni41B19 after longtime loading at different annealing temperatures below the glass transition temperature have been studied using
anisothermal differential scanning calorimetry (DSC) and dilatometry (TMA). It has been demonstrated that structural relaxation
effects depend on the stress-annealing temperature of the amorphous ribbon. The structural relaxation states of the amorphous
ribbon annealed at different temperatures under and without applied stress have been compared. The activation energy spectra
were calculated from the anisothermal dilatometric measurements using the modern method based on the Fourier transformation
technique. The influence of the annealing temperature on the shape of creep strain recovery spectra has been analyzed.
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Mouhssin Oufir Nadine Schulz Patan Shaik Sha Vallikhan Eva Wilhelm Kornel Burg Jean-Francois Hausman Lucien Hoffmann Cedric Guignard 《Journal of chromatography. A》2009,1216(7):1094-1099
A mass spectrometer was coupled to high-performance ligand-exchange liquid chromatography (HPLEC) for simultaneous analysis of stress associated solutes such as proline, hydroxyproline, methylproline, glycine betaine and trigonelline extracted from leaves of drought stressed oaks and an internal standard namely N-acetylproline. Methanol/chloroform/water extracts were analyzed using an Aminex HPX-87C column and specifically quantified by the positive ion mode of an electrospray ionisation-mass spectrometry (ESI-MS) in single ion monitoring (SIM) mode. The recovery of N-acetyl proline added to oak leaf extracts ranged from 85.2 to 122.1% for an intra-day study. Standard calibration curves showed good linearity in the measured range from 0.3125 to 10 μmol L−1 with the lowest correlation coefficient of 0.99961 for trigonelline. The advantages of this alternative procedure, compared to previously published methods using fluorescence or amperometric detections, are the simultaneous and direct detection of osmoprotectants in a single chromatographic run, a minimal sample preparation, a good specificity and reduced limits of quantification, ranging from 0.1 to 0.6 μmol L−1. Fifty-six days of water deficit exposure resulted in increased foliar free proline levels (2.4-fold, P < 0.001, 155 μmol g−1 FW) and glycine betaine contents (2.5-fold, P < 0.05, 175 μmol g−1 FW) of drought stressed oak compared to control. 相似文献
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Lung cancer is the leading cause of cancer-related deaths globally. Despite current treatment approaches that include surgery, chemotherapy, radiation and immunotherapies, lung cancer accounted for 1.79 million deaths worldwide in 2020, emphasizing the urgent need to find novel agents and approaches for more effective treatment. Traditionally, chemicals derived from plants, such as paclitaxel and docetaxel, have been used in cancer treatment, and in recent years, research has focused on finding other plant-derived chemicals that can be used in the fight against lung cancer. Ursolic acid is a polyphenol found in high concentrations in cranberries and other fruits and has been demonstrated to have anti-inflammatory, antioxidant and anticancer properties. In this review, we summarize recent research examining the effects of ursolic acid and its derivatives on lung cancer. Data from in vitro cell culture and in vivo animal studies show potent anticancer effects of ursolic acid and indicate the need for clinical studies. 相似文献
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Kornel Lanczos 《Mathematische Annalen》1926,95(1):143-153
Ohne Zusammenfassung 相似文献
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C. Lanczos 《Foundations of Physics》1975,5(1):9-18
The field equations of the quadratic action principle of relativity are solved, assuming a weak perturbation of the basic structure, which is a highly agitated Riemannian lattice field of a very small lattice constant. A field emerges which can be interpreted as the weak gravitational field of an apparently Minkowskian space. This field does not coincide with Einstein's theory of weak gravitational fields. Whereas the redshift remains unchanged, the light deflection becomes reduced by11.1% of the value predicted by Einstein. 相似文献