Katalitička oksidacija i antioksidacijska svojstva eteričnih ulja timijana (Thymus vulgaris L.)

The antioxidant properties of two chemotypes of thyme essential oils were examined in relation to their catalytic transformation. Catalytic oxidations were performed with potassium hydrogentrioxoperoxosulfate(VI) and the FeIII meso-tetraphenylporphyrin catalytic system, after which the chemical compositions of essential oils were changed. The antioxidant activity was investigated by two different methods: the 2,2\u27-diphenyl-1-picrylhydrazyl radical scavenging method and the Ferric Reducing / Antioxidant Power assay. Both methods have shown that the phenolic chemotype possesses stronger antioxidant properties than the non-phenolic one. After catalytic oxidation, the essential oils of both chemotypes showed stronger antioxidant effects than before oxidation.Ispitana su antioksidacijska svojstva eteričnih ulja dvaju kemotipova timijana ovisno o njihovoj katalitičkoj transformaciji. Katalitička transformacija je provedena s kalijevim hidrogentrioksoperoksosulfatom(VI) i FeIII mezo-tetrafenilporfirin katalitičkim sustavom, poslije čega je kemijski sastav eteričnih ulja izmijenjen. Antioksidacijska aktivnost ispitana je s dvije različite metode (2,2\u27-diphenyl-1-picrylhydrazyl radical scavenging i Ferric Reducing / Antioxidant Power). Obje su metode pokazale da fenolni kemotip posjeduje jača antioksidacijska svojstva od nefenolnoga tipa. Poslije katalitičke oksidacije, eterična ulja obaju kemotipova timijana pokazivala su jači antioksidacijski učinak

Uloga višeslojne kompjutorizirane tomografije u dijagnostici i procjeni kliničke važnosti koronarnih arterija intramiokardnoga tijeka

Myocardial “bridging” (MB) is an entity known for more than 200 years. However, the frequency of MB-and still is unknown, we do not know whether the MB is hereditary or not, what is its clinical significance; there are no guidelines on how to diagnose it, and whether it should be and how to treat. The aim of this investigation was to determine the frequency of MB-a in patients with clinically suspected coronary artery disease and assess the clinical significance of MB based on MSCT coronary angiography, to investigate the relationship of the clinical finding with the characteristics of MB and the possible impact on future therapeutic strategy and future guidelines of the MB

Chemical Composition and Antioxidant Effect of Free Volatile Aglycones from Nutmeg (Myristica fragrans Houtt.) Compared to Its Essential Oil

The paper reports on the isolation of glycosidically bound volatiles from nutmeg, identification of free aglycones, and determination of the antioxidative power of free aglycones in comparison with nutmeg essential oil. Comparison of the chemical composition of free volatiles with the chemical composition of free volatile compounds found in the essential oil reveals only two common compounds (eugenol, terpinen-4-ol). To measure the antioxidative activities of the essential oil and enzymatically released aglycones from nutmeg, two different assays were performed: the 2,2\u27-diphenyl-1-picrylhydrazyl radical scavenging method (DPPH) and the ferric reducing / antioxidant power assay (FRAP). Both methods showed that the aglycone fraction possesses stronger antioxidant properties than free volatiles from the oil

Chemical Composition and Antioxidant Effect of Free Volatile Aglycones from Nutmeg (Myristica fragrans Houtt.) Compared to Its Essential Oil

The paper reports on the isolation of glycosidically bound volatiles from nutmeg, identification of free aglycones, and determination of the antioxidative power of free aglycones in comparison with nutmeg essential oil. Comparison of the chemical composition of free volatiles with the chemical composition of free volatile compounds found in the essential oil reveals only two common compounds (eugenol, terpinen-4-ol). To measure the antioxidative activities of the essential oil and enzymatically released aglycones from nutmeg, two different assays were performed: the 2,2\u27-diphenyl-1-picrylhydrazyl radical scavenging method (DPPH) and the ferric reducing / antioxidant power assay (FRAP). Both methods showed that the aglycone fraction possesses stronger antioxidant properties than free volatiles from the oil

Mehanizam u žarištu potresa od 25. studenog 1986. pokraj Knina

y analyzing the P-wave first motion polarities we have obtained the fault plane solution for the Knin earthquake of 25 November 1986. The fault plane/auxiliary plane ambiguity was resolved by comparing the solutions to the known geological features of the area. We were able to obtain practically the same result by modeling the first 10 s of the P-wave as recorded on the broad-band instrument at GRF, thus confirming the relatively poorly constrained classical solution parameters. The earthquake has probably occurred on the northern section of the NW-SE striking right lateral reverse Knin fault. The pressure axis corresponding to the fault plane solution does not lie in the direction of the regional compressional stress filed as reported by others, thus indicating strong deformation of the local stresses that is probably the result of interaction of numerous block structures present in that area

Myocardial Bridging: A cause for concern?

Myocardial bridging(MB) is a condition where a segment of a coronary artery, which normally runs on the surface of the heart muscle, instead dives into the heart muscle and then re-emerges to continue its normal path. In MB, a segment of the coronary artery dives into the heart muscle during systole and re-emerges during diastole. This can lead to compression of the artery, reducing blood flow to the heart muscle during systole and causing symptoms such as chest pain or shortness of breath

Chemical Composition and Antioxidant Activity of Essential Oils of Twelve Spice Plants

Chemical compositions and related total antioxidant capacities of twelve spice essential oils were analyzed. To enable a comparison of their relative antioxidant potentials, essential oils were extracted by hydrodistillation from selected spice plants and their chemical compositions were determined by the GC-MS system on two fused-silica capillary columns of different polarity. Antioxidant effectiveness was examined by four different methods: the 2,2\u27-diphenyl- 1-picrylhydrazyl (DPPH) radical scavenging method, determination of ferric reducing antioxidant power (FRAP), determination of antioxidant activity with thiobarbituric acid reactive species (TBARS) and automatic determination of the oxidative stability of fat (RANCIMAT). Based on their antioxidant capacity, twelve spice essential oils can be sorted in descending order: Clove (Syzygium aromaticum L.) > Basil (Ocimum basilicum L.) > Laurel (Laurus nobilis L.) > Coriander (Coriandrum sativum L.) > Nutmeg (Myristica fragrans Houtt.) > Black Pepper (Piper nigrum L.) > Everlast (Helichrysum italicum G. (Roth) Don) > Mint (Mentha piperita L.) > Marjoram (Marjorana hortensis Moench.) > Cinnamon (Cinnamomum zeylanicum Nees) > Sage (Salvia officinalis L.) > Fennel (Foeniculum vulgare Muller)