Photoacoustic properties of single crystal PbTe(Ni)

Single crystals of PbTe(Ni) were investigated by the photoacoustic method. They were produced using the Bridgeman method. These crystals have a sodium chloride cubic lattice and could be cleaved paralel to the plane orientation (200). They were of the n-type. Phase and amplitude photoacoustic spectra were measured using a transmision detection configuration set-up. Photoacoustic (PA) spectra (single and normalized) were numerically analyzed using the Rosencwaig-Gersho model. Thermal diffusivity and some electron-transport parameters were determined. These results were compared with existing results for pure single crystal PbTe. Thermal difusivity of PbTe(Ni) is a bit higher than the thermal difusivity of pure PbTe. This is the consequence of a decreasing concentration of the majority free carriers in the doped alloy

Assessment of trace metal alterations in the blood, cerebrospinal fluid and tissue samples of patients with malignant brain tumors

The pathogenesis of malignant brain tumors (MBTs) should be better understood due to the evident association between prolonged exposure to metals and increased risk of MBTs. The present research aimed to find trace metals that could contribute to the pathogenesis of MBTs. Essential trace elements (Mn, Co, Zn, Cu, Se) and relevant toxic metals (Al, Ni, As, Sr, Cd, Ce, Pt, Pb, U) in the serum, cell fraction (CF), cerebrospinal fluid (CSF) and cancerous tissue (CT) samples of MBT patients were analyzed. The results were compared with sex- and age-matched control groups. For the first time, this research showed that elemental profiles of serum, CF, CSF and CT samples in MBT patients were significantly altered compared to the appropriate controls, as well as that higher contents of trace elements (particularly Mn, Se, and Pb) could be involved in the pathogenesis of MBTs. However, the most noticeable change found was the elevated U content, indicating its considerable role as a major cerebral discriminator of the presence/absence of MBTs. The U/Se ratio could be considered as an appropriate blood marker in diagnostic MBT evaluation. The reported results could contribute to better understanding of the poorly understood pathogenesis of MBTs. Furthermore, the reported results could highlight a molecular basis for the pathophysiological changes caused by the hazardous effects of trace metals on brain homeostasis

Supplementary data for the article: Stojsavljević, A.; Rovčanin, B.; Krstić, Đ.; Borković-Mitić, S.; Paunović, I.; Kodranov, I.; Gavrović-Jankulović, M.; Manojlović, D. Evaluation of Trace Metals in Thyroid Tissues: Comparative Analysis with Benign and Malignant Thyroid Diseases. Ecotoxicology and Environmental Safety 2019, 183. https://doi.org/10.1016/j.ecoenv.2019.109479

Supplementary material for: [10.1016/j.ecoenv.2019.109479]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/3285

Far infrared properties of iron doped single crystal PbTe

Far infrared reflectivity spectra of single crystal PbTe samples doped with 0.2 at% Fe were measured in the temperature range between 10 K and 300 K. These spectra show very sharp and narrow dips below 120 cm-1. The experimental data were numerically analyzed using a fitting procedure based on the plasmon-phonon interaction model. Two local modes were observed. The first one was noted between 130 cm-1 and 170 cm-1 depending on the temperature and the second more frequency stable one was noted at about 230 cm-1

Supplementary data for article: Marković, V.; Erić, S.; Stanojković, T.; Gligorijević, N.; Aranđelović, S.; Todorović, N.; Trifunović, S. S.; Manojlović, N.; Jelic, R.; Joksović, M. D. Antiproliferative Activity and QSAR Studies of a Series of New 4-Aminomethylidene Derivatives of Some Pyrazol-5-Ones. Bioorganic and Medicinal Chemistry Letters 2011, 21 (15), 4416–4421. https://doi.org/10.1016/j.bmcl.2011.06.025

Supplementary material for: [https://doi.org/10.1016/j.bmcl.2011.06.025]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1175

Supplementary material for the article: Stojsavljević, A.; Rovčanin, B.; Krstić; Jagodić, J.; Borković-Mitić, S.; Paunović, I.; Živaljević, V.; Mitić, B.; Gavrović-Jankulović, M.; Manojlović, D. Cadmium as Main Endocrine Disruptor in Papillary Thyroid Carcinoma and the Significance of Cd/Se Ratio for Thyroid Tissue Pathophysiology. Journal of Trace Elements in Medicine and Biology 2019, 55, 190–195. https://doi.org/10.1016/j.jtemb.2019.06.009

Supplementary material for: [https://doi.org/10.1016/j.jtemb.2019.06.009]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/3293

Cardiovascular risk factors in 7-13 years old children from Vojvodina (Serbia)

Background: Atherosclerosis is a chronic inflammatory disease which starts early in life and depends on many factors, an important one being dyslipoproteinemia. According to several studies, atherosclerotic plaques or their precursors could be seen in children younger than 10 years. During later life, interaction with a sedentary way of life, as well as unhealthy nutrition, smoking, alcohol consumption, obesity and family history of cardiovascular disease cause the burden of atherosclerotic disease. Methods: Study included 624 children (316 boys, 308 girls), aged from 7-13 years. We analysed socio-demographic data (BMI, blood pressure, cardiovascular family history, smoking status), as well as lipid status with lipoprotein little a-Lp(a), and apolipoproteins: Apo AI, Apo B-100 for all children. This enabled us to calculate new atherogenic indices Tg/HDL-c, lipid tetrad index (LTI) and lipid pentad index (LPI). Cardiovascular risk for later life was estimated by using modified Risk Score for Young Individuals (RS), which divided the subjects according to the score level: low, medium and higher risk. Results: The older children (13 y) had better lipid status than the younger children, i.e. significantly lower total cholesterol, LDL-C, triglycerides and non-HDL-C concentration and significantly higher HDL-C concentration than the younger children and this was in accordance with the RS level. Children with a positive family history of CV disease had significantly higher Lp(a) concentration and blood pressure. LPI was significantly higher in children with a higher RS. Conclusions: The results of our work could be used for cardiovascular risk assessment in apparently healthy children to provide preventive measures which could control the change able risk factors

Far infrared properties of sintered PbTe doped with boron

Far infrared spectra of sintered PbTe doped with boron were analyzed. The measured infrared spectra were fitted using a modified plasmon-phonnon interaction model with two additional oscillators (at about 195 cm-1 and 285 cm-1) representing local B-impurity modes. The obtained results were compared with previously published data for a single crystal PbTe sample doped with boron

Supplementary data for the article: Prokić, M. D.; Borković-Mitić, S. S.; Krizmanić, I. I.; Mutić, J. J.; Trifković, J. Đ.; Gavrić, J. P.; Despotović, S. G.; Gavrilović, B. R.; Radovanović, T. B.; Pavlović, S. Z.; et al. Bioaccumulation and Effects of Metals on Oxidative Stress and Neurotoxicity Parameters in the Frogs from the Pelophylax Esculentus Complex. Ecotoxicology 2016, 25 (8), 1531–1542. https://doi.org/10.1007/s10646-016-1707-x

Supplementary material for: [https://doi.org/10.1007/s10646-016-1707-x]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2340