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Electrical semiconductor characterization
Luminescence dating, research, dosimetry and more
Free radical measurements in life science and biomedical applications
Our benchtop MiniScope (MS 5000) ESR spectrometer is a research grade device with sensitivity and reliability for demanding...
The MS 6000 is a research device with high-end sensitivity for sophisticated applications in field of science & technology.
Industry standard for evaluating irradiation doses on alanine tablets
Nitric oxide measurement, reactive oxygen species, oxidative stress, radical generating systems, photo dynamic therapy
Antioxidative features of foodstuff, radicals on foodstuff, radiation-induced radicals
Analysis of chemical structure of paramagnetic centers and their orientation within a crystal
Bioinorganic transition metal compounds, fenton chemistry, effect of heavy metal ions on livving tissue
Variety of free radicals in environmental applications can be evaluated by EPR spectroscopy
Living polymers, nitroxide quantification, radicals in varnish, UV stability of scratch resistant varnish
Quality control of pharmaceuticals and impurity profiling
Oxymetry, membrane fluidity, pH in microenvironment, viscosity, phase partition
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Fruits, vegetables, wine, tea and coffee contain large amounts of reducing agents that protect their cell structure. The human body can only produce a limited number of antioxidants. Thus, its demands are matched by consuming food. The amount of antioxidants in food can be measured using ESR.
(Belton et al. 2000)
Free radicals are highly reactive species that can alter proteins and DNA. To protect their biomolecular key points from radicals fruits and vegetables produce antioxidants. These react quickly with radicals inside the organism to prevent cellular damage.
The Antioxidant activity is a factor giving an idea of the health supporting effect. Antioxidant activity analysis starts with adding a known amount of stable radicals (e.g. TEMPOL) to the fruit or vegetable juice. The antioxidants will consume these radicals. The difference between its remaining and the initial concentration is proportional to the antioxidant activity.
(Kroh et al. 2007)
Plants grow in accordance with their environment. Different plants may grow an infructescence that yields lush and healthy-looking fruit. Yet, their content of life-preserving substances may vary significantly depending on the location
Kroh et al. investigated this simple observation within one climatic region. Highbush blueberries (Vaccinium corymbosum L) were grown in different locations around Berlin. Plants grown on formerly used farmland were compared to others grown on forest soil. Two picking dates and different fertilization as well as ground covers were also tested.
Antioxidant activity analysis by ESR showed significant differences between different locations and times of harvest (see Fig. 1 & 3)
P. S. Belton, Ch. Chen, H.-R. Tang, L. H. Sutcliffe (2000) Journal of Agricultural and Food Chemistry 48, 5710 - 5714
L. W. Kroh, I. eichholz, S. Rohn, S. Huykens-Keil (2007) Journal of Applied Botany and Food Quality 81, 41 - 44
L. W. Kroh, B. Cämmerer (2006) European Food Research and Technology 223, 469 - 474