QUALITY ANALYSIS OF BASIC RESOURCES FROM THE ASPECT OF FEASIBLITY OF ALUMINA CEMENT PRODUCTION

Main objective of this paper is feasibility of alumina cement production on the Republic of Srpska resources basis. As is known calcium-alumina cement is type of mineral hydraulic binder. As basic resources of CAC production are used bauxite and calcite. There are two main production processes: the fusion, Al2O3 less than 50% and the sintering process, Al2O3 higher than 50%. Republic of Srpska has two main bauxite deposits: Milici and Srebrenice mines and alumina factory in Zvornik. There are a couple calcite deposits with possible CAC technology requirements. Also the nearest CAC factory is in Istria, Republic of Croatia

Lajm neuroborelioza

Lyme borreliosis (LB) is a multisystemic zoonotic disease which in humans can involve the skin, joints, heart and/or nervous system. In this study a total of 11 patients with clinical manifestations have been assessed at the Institute for Occupational Health. Evaluation of the patients was done in order to determine their working capability and further professional orientation. Patients were of different gender, age, education and profession. They fulfilled at least two of the three criteria: tick infestation data (epidemiological criteria), central and/or peripheral neurological symptoms (clinical criteria) and a positive serological finding. Diagnosis was done upon classical clinical criteria: electromyeloneurography (EMNG) analysis, neurological impairments, electroencephalography (EEG), computer tomography (CT) and/or magnetic resonance imaging (MRI). IgM and IgG antibodies against B. burgdorferi were determined by commercial ELISA kits. IgM antibodies were recorded in the serum of 4 (44.4%) and IgG in 6 (66.7%) patients. Electro-myeloneurography findings of the upper and lower limbs were positive in 5 (83.3%), electroencephalography in 4 (66.6%) of the 6 observed patients and CT was positive in 4 (36.4%) of the 5 observed patients. The study has established that in patients with neuroborreliosis (NB) the capability to carry out intellectual tasks, as well as responsible duties is impaired due to poor memory. Patients suffering from peripheral neuropathies are not fit to withstand longterm walks, weight lifting and carrying or any other form of physical stress.Lajm borelioza je multisistemsko oboljenje, iz grupe zoonoza koje kod ljudi može zahvatiti kožu, zglobove, srce i/ili nervni sistem. Istraživanjem je obuhvaćeno 11 bolesnika sa kliničkim manifestacijama neuroborelioze koji su ispitivani u Institutu za medicinu rada Srbije u cilju ocene radne sposobnosti i dalje profesionalne orijentacije. Ispitani su bolesnici različite starosti, pola, nivoa obrazovanja i različitih zanimanja koji su ispunili minimalno dva od tri kriterijuma i to: podatak o ubodu krpelja (epidemiološki kriterijum), ispoljavanje centralnih i/ili, perifernih neuroloških simptoma (klinički kriterijum) i pozitivan serološki nalaz. Dijagnoza neuroborelioze je postavljena na osnovu klasičnih kliničkih kriterijuma: neurološ kih ispada, analize elektro-mioneurografije (EMNG), elektroencefalografije (EEG), kompjuterske tomografije (CT) i/ili magnetne rezonance (MRI). Ispitivanje prisustva antitela IgM i IgG klase u krvnom serumu prema B. burgdorferi vršeno je komercijalnim ELISA testom. Antitela IgM klase registrovana su u serumu četiri (44,4%), dok su IgG antitela registrovana kod 6 (66,7%) ispitanih pacijenata. Nalaz elektro-mioneurografije gornjih i donjih ekstremiteta je bio pozitivan kod pet (83,3%), nalaz elektroencefalografije kod četiri (66,6%) od šest ispitanih pacijenata, dok je nalaz CT bio pozitivan kod 4 (36,4%) od pet ispitanih pacijenata. Sprovedenim ispitivanjem je utvrđeno da je kod bolesnika sa razvijenom neuroboreliozom smanjena sposobnost za bilo koju vrstu intelektualnog rada, kao i za poslove koji su povezani sa moralnom i materijalnom odgovornošću zbog problema sa pamćenjem. Kod bolesnika sa perifernim neuropatijama postoji nesposobnost za poslove koji uključuju dugotrajno stajanje i hodanje, dizanje i nošenje tereta, kao i bilo koju vrstu fizičkog rada

THE EFFECT OF ADDITIVES ON α-Al2O3 OCCURRENCE KINETICS DURING HEATING OF INDUSTRIAL ALUMINUM HYDROXIDE

This paper presents the results of the impact of basic additives in the process of heating (calcinations) of industrial aluminum hydroxide and the formation of the final stable phase α- Al2O3. The influence of additives have been focused on the result of the impact, ie. on the kinetics of crystallization of α-Al2O3, and the comparative analysis of the corresponding activation energies determined for each of the additives used. Based on the experimental results, using a suitable fundamental principles of the Arrhenius equation and suitable statistical tools, it can be concluded about the possible impact of certain quantity additives on the kinetics of the crystallization process, whose results are presented in this paper

THE EFFECT OF ADDITIVES ON α-Al2O3 OCCURRENCE KINETICS DURING HEATING OF INDUSTRIAL ALUMINUM HYDROXIDE

This paper presents the results of the impact of basic additives in the process of heating (calcinations) of industrial aluminum hydroxide and the formation of the final stable phase α- Al2O3. The influence of additives have been focused on the result of the impact, ie. on the kinetics of crystallization of α-Al2O3, and the comparative analysis of the corresponding activation energies determined for each of the additives used. Based on the experimental results, using a suitable fundamental principles of the Arrhenius equation and suitable statistical tools, it can be concluded about the possible impact of certain quantity additives on the kinetics of the crystallization process, whose results are presented in this paper

INFLUENCE OF GLUCOSE ON SPECIFIC SURFACE AND TEXTURAL PROPERTIES OF NANO CRYSTAL MESOPOROUS ALUMINA

Powders based on oxides and oxyhydroxides of aluminum, depending on their characteristics, have very diverse applications in various areas of the chemical industry. In recent years, obtaining powders with nano scale particle size, significantly expanding the possibilities for the application of this type of materials, especially in the field of so-called high technology with emphasis in the area of adsorbents. Mesoporous alumina is widely used as catalyst support and the adsorbent, and its physical properties, such as specific surface area, pore size distribution and total pore volume, has a significant impact on its efficiency in practice. Thermally activated powders of conventional intermediate γ-Al 2O 3, with a specific surface area (<300 m 2/ g), have limited catalytic application. The specific surface area of mesoporous alumina, obtained in the neutralization processes without additives, are generally in the range of 350-400 m 2 / g and have a wide distribution of pore size. Addition of glucose in these processes affect the obtaining mesoporous alumina with a large specific surface area and narrow pore distribution. For obtaining mesoporous alumina with a large specific surface area and narrow pore distribution in this work, it is used precipitation process of neutralization of aluminate ions with sulfuric acid with the addition of glucose. Powder X–ray diffraction (XRD), Fourier–transformed infrared spectroscopy (FT–IR) and low–temperature nitrogen absorption were used for characteration of transition phases and texture of synthesized and thermally activated samples

The effects of N-acetyl-L-cysteine on subchronic methionine load in male wistar rats: Focus on standard biochemical parameters and markers of homocysteine metabolism in blood

86th Congress of the European-Atherosclerosis-Society (EAS), Lisbon,PORTUGAL, MAY 05-08, 201

Comparison of the effects of different sulfur amino acids on cardiovascular system in male wistar rats

Joint meeting of national physiological societies : May 25-27, 2017, Subotica