Wiener Neustadt, Austria
Wiener Neustadt, Austria

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Porta S.,Institute of Applied Stress Research | Porta S.,Medical University of Graz | Porta S.,Theresian Military Academy | Gell H.,Theresian Military Academy | And 6 more authors.
Trace Elements and Electrolytes | Year: 2013

Out of 100 μl of capillary blood of 15 ensigns from the Theresian Military Academy, ionized magnesium was determined with a CCX device (NOVA Biomedical) and CSA Software (PLK, Judendorf- Strassengel, Austria), before and after a 2,400 m run, both before and after an 8 week-long supplementation of 300 mg magnesium per day. It turned out that Mg changes in blood mainly follow two interlinked phenomena: 1. Mg substitution leads to more controlled Mg input into the blood after the same sporting challenge, and 2. Mg clearance is strictly proportional to Mg concentration in blood. Varying permutations of those two points explain the entire performance of Mg dynamics in blood, including the hitherto unexplained paradox decrease of blood Mg during substitution [1, 2]. © 2013 Dustri-Verlag Dr. K. Feistle.

Porta S.,Institute of Applied Stress Research | Porta S.,Theresian Military Academy | Pichlkastner K.,Theresian Military Academy | Gell H.,Theresian Military Academy | And 2 more authors.
Trace Elements and Electrolytes | Year: 2015

When measuring the quotient of ionized Ca and ionized Mg in the blood of 512 persons of both sexes and different ages, it turns out that only after a submaximal workload, a significant, positive, linear correlation evolves. In an exclusively male group of 160 probands however, positive linear correlation exists even without workload, which is also the case in type 2 diabetics. Thus, a group of mixed or female gender with significant Ca/Mg relation should arouse suspicion concerning an eventually strained condition or even chronic illness. © 2015 Dustri-Verlag Dr. K. Feistle.

Bratu M.M.,Ovidius University | Doroftei E.,Ovidius University | Negreanu-Pirjol T.,Ovidius University | Hostina C.,Ovidius University | And 3 more authors.
Food Technology and Biotechnology | Year: 2012

The aim of the study is to measure the in vitro antioxidant activity of elderberry (Sambucus nigra) fruit extract and to study its toxicity in a plant model system with regard to its possible application in food and agricultural industry. The antioxidant capacity of Sambucus nigra fruit powder was quantified by a photochemiluminescence method. The study of phytotoxicity of aqueous solutions of powder extract was performed using Allium cepa as a test organism. Photochemiluminescence determinations showed a very high antioxidant capacity of the product but also revealed its cytotoxic effect, along with mitodepressive activity and even inhibiton of mitosis at the preprophase stage when the fruit extract was used at higher concentrations. Aqueous solutions of the fruit powder have a reasonably expressed mutagenic activity in vivo on the radicles of Allium cepa, especially when they are used at a concentration of 1 g/dL for a prolonged time (48 h). At lower concentrations (0.1 g/dL), however, the mutagenic effect was not observed any more. The conclusion of our study is that Sambucus nigra fruit extract powder has a very high in vitro antioxidant activity and no mutagenic effects at low concentrations, which makes it recommendable for applications in the food industry.

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