Authors:Sándor Keszthelyi, Ferenc Pál-Fám, and Ildikó Kerepesi
Vizsgálataink során meghatároztuk a kukorica szemtermésének gyapottok-bagolylepke okozta beltartalom- és fehérje-összetétel változását. Kontroll, részkárosított és károsított minták szárazanyag-, nyerszsír-, nyersfehérje- és keményítő tartalmát hasonlítottuk össze, illetve vizsgáltuk az egyes csoportok fehérje-összetételének alakulását is. Vizsgálati eredményeink a károsítás hatására fellépő fokozott vízvesztést, kényszerérést nem igazolták. A károsítás hatására az 1 hektárra kalkulált nyerszsír (veszteség: 9,29 kg, 2,92%) és a keményítő (veszteség: 214,03 kg, 3,55%) tartalom csökkenése re-gisztrálható volt. Az ezzel párhuzamosan jelentkező nyersfehérje tartalom emelkedésének háttérében álló fehérjestruktúra változást az SDS PAGE vizsgálatok igazolták, amelyet a legkifejezőbben a károsított magvaknál a kis molekulatömegű zein fehérjék eltűnése magyaráz. A fehérjetartalom növekedésének hátterében a 114, 50, 46, 35 kDa molekulatömegű fehérjék mennyiségi növekedése áll.
Authors:Helga Egri Bosnyákné, Ildikó Kerepesi, and Sándor Keszthelyi
Climate change has brought about an increasing level of seedcorn maggot (Delia platura Meigen, 1826) (Diptera: Anthomyiidae) damage in Hungary. In order to have a more accurate understanding of the effects of these plant injuries induced by the larvae of D. platura, the nutrient content of soybean (Glycine max L. Merill.) was studied. Our results show that the moisture, raw fat, raw fibre, and raw ash content of the batches damaged by D. platura were significantly less in comparison with that of the control samples. In response to the deleterious effect of the insect, the infected soybean plants showed forced ripening (P = 0.004) (P > 0.05). The difference of moisture content between damaged and control samples was 2.30% on average. The fact of nutritional value loss was also reflected by the alteration of sugar mobilisation. As the result of this experiment the sucrose breakdown to glucose and fructose during the germination was significantly slower in the damaged seeds than that of the control ones. Overall, this late and surprising damage caused by D. platura led to the forced ripening of the affected soybean plants and a significant change in their nutritional values. Based on the herein reported results, it is presumable that in cases when the current climatic extremities, which are envisaged to occur more frequently in the future, and effects of agricultural practices will be coincided in the future a qualitative change of the produced soybean batches can be expected through the damage caused by this fly species.
Authors:B. Sandor, J. Papp, Gy. Mozsik, J. Szolcsanyi, Zs. Keszthelyi, I. Juricskay, K. Toth, and Tamas Habon
Capsaicin is a well-known component of red pepper. Recent studies have shown that capsaicin could prevent gastric ulcer provoked by various NSAID-s like acetylsalicylic acid (ASA). Primary objective of this human clinical phase I trial was to investigate whether two different doses of capsaicin co-administered with ASA could alter the inhibitory effect of ASA on platelet aggregation. 15 healthy male subjects were involved in the study and treated orally with 400 μg capsaicin, 800 μg capsaicin, 500 mg ASA, 400 μg capsaicin+500 mg ASA and 800 μg capsaicin+500 mg ASA. Blood was drawn before and 1, 2, 6 and 24 hours after the drug administration. After that epinephrine induced platelet aggregation was measured by optical aggregometry. Between treatments, volunteers had a 6-day wash-out period. Our results showed that capsaicin had no effect on platelet aggregation, while as expected, ASA monotherapy resulted in a significant and clinically effective platelet aggregation inhibition (p ≤ 0.001). The combined ASA-capsaicin therapies reached equivalent effectiveness in platelet aggregation inhibition as ASA monotherapy. Our investigation proved that capsaicin did not influence the inhibitory effect of ASA on platelet aggregation, thus the capsaicin-ASA treatment would combine the antiplatelet effect of ASA with the possible gastroprotection of capsaicin.
Authors:Mahmood Al Ramahi, Sándor Beszédes, and Gábor Keszthelyi-Szabó
Industrial wastewater is a growing environmental challenge due to its high concentrations of organics and its limited biological degradability. Up to date, however, no published work discussed industrial wastewater characterization, which is the focus of this study. Moreover, the effect of hydrothermal treatment on the chemical oxygen demand (COD) removal and the soluble chemical oxygen demand (SCOD) release was investigated in this work. Wastewater samples were collected from different industrial sites and characterized in order to determine their initial properties. It was summarized that the salinity of wastewater estimated by EC was relatively low, and its pH values were in the acceptable range. On the other hand, however, high values of sodium absorption ratio (SAR) were obtained in all samples post to hydrothermal treatment. Nonetheless, our results revealed higher SCOD release post to hydrothermal treatment suggesting better efficiency of COD removal obtained by this treatment technique.