Research of Natural Antioxidants Influence on Oxidation Stability and Tribological Properties of Rapeseed Oil

Vegetable oils have good tribological and viscosity properties together with excellent biodegrad- ability and non-toxicity. Unfortunately, their wider use is restricted by poor oxidation stability. Durability of vegetable oil based lubricants depends mainly on oxidation. This problem has been analysed in many research works. Nevertheless, scientists agree that there still remain many unanswered questions in this field. In this study the sage and thyme extracts and attars are suggested for use as antioxidants in rapeseed oil. The influence of natural antioxidants on oxidation stability, kinematic viscosity and tribological properties of rapeseed oil was measured. The sage and thyme extracts studied showed good oxidation stabili¬sation properties and had no negative influence on tribological properties of rapeseed oilVytauto Didžiojo universitetasŽemės ūkio akademij

Research of natural antioxidants influence on oxidation stability and tribological properties of rapeseed oil

Vegetable oils have good tribological and viscosity properties together with excellent biodegradability and non-toxicity. Unfortunately there wider use is restricted by pure oxidation stability. Durability of vegetable oil based lubricants depends mainly on oxidation. This problem was analysed in many research works. Nevertheless scientists agree, that still remain many unanswered questions in this field. In the preset study the sage and thyme extracts and attars are suggested to use them as antioxidants in rapeseed oil. Natural antioxidant influence on oxidation stability, kinematic viscosity and tribological properties of rapeseed oil was measured. The studied sage and thyme extracts showed good oxidation stabilisation properties and has no negative influence on tribological properties of rapeseed oilVytauto Didžiojo universitetasŽemės ūkio akademij

Genetic polymorphisms of hemostatic factors and thrombotic risk in non BCR-ABL myeloproliferative neoplasms: A pilot study

The most important complications of Philadelphianegagive (non BCR-ABL) myeloproliferative neoplasms (MPNs) are vascular events. Our aim was to evaluate the effects of single nucleotide polymorphisms (SNPs), platelet glycoproteins (GPs) (Ia/IIa, Ibα, IIb/IIIa and VI), von Willebrand factor (vWF), coagulation factor VII (FVII), β-fibrinogen, and the risk of thrombosis in patients with non BCR-ABL MPNs at the Lithuanian University of Health Sciences. Kaunas, Lithuania. Genotyping was done for 108 patients. The TT genotype of the GP Ia/IIa c.807C>T polymorphism was more frequently found in the group of MPN patients with arterial thrombosis compared to MPN patients who were thrombosis-free [26.5 vs. 11.5%, p = 0.049; odds ratio (OR) 2.68; 95% confidence interval (95% CI) 1.01-7.38]. The CT genotype of the β-fibrinogen c.-148C>T polymorphism occurred more frequently in MPN patients with arterial, and total thrombosis compared to the wild or homozygous genotype (57.7 vs. 40.0 vs. 12.5%; p = 0.027), (64.7 vs. 44.4 vs. 25%; p = 0.032), respectively. The carrier state for the c.-323P10 variant of FVII SNP (summation of P10/10 and P0/10) was more frequent in MPN patients with thrombosis compared to the wild-type genotype carriers (71.4 vs. 43.4%; p = 0.049; OR 3.26; 95% CI 1.01-11.31). The coexistence of heterozygous β-fibrinogen c.-148C>T and FVII c.-323P0/10 SNP, increased the risk of arterial thrombosis (21.1 vs. 3.7%, p = 0.008; OR 6.93; 95% CI 1.38-34.80). The TT genotype of GP Ia/IIa c.807C>T, the CT genotype of β-fibrinogen c.-148C>T and FVII c.-323P0/10 SNP could be associated with risk of thrombosis in MPN patients