The raw clay “Klokoti” from middle Bosnia was beneficiated by method of wet separation which results in removing fraction over 20 μm. The raw clay was characterized by chemical composition, grain size distribution and characteristic temperatures on heating microscope. The beneficiated clay was characterized by chemical composition and characteristic temperatures. The phase composition of raw and beneficiated clay was observed by RDA while the microstructure was monitored on scanning electron microscope (SEM). The sintering process was performed at 1100oC, 1250oC, 1320oC and 1400oC with two hours holding time at the highest temperature. The obtained results indicate a big content of coarse quartz in raw clay and gradually increase of crystalline mullite content with increasing temperature of sintering. Beneficiated clay at higher temperature of sintering produces larger glassy phase content, which is result of larger fluxing content in its composition. It is also observed that from beneficiated clay by sintering at 1250°C crystallize the most mullite along with minimum porosity and the lowest glassy phase content.

The technical analysis of a hybrid wind-photovoltaic energy system with hydrogen gas storage was studied. The market for the distributed power generation based on renewable energy is increasing, particularly for the standalone mini-grid applications. The main design components of PV/Wind hybrid system are the PV panels, the wind turbine and an alkaline electrolyzer with tank. The technical analysis is based on the transient system simulation program TRNSYS 16. The study is realized using the meteorological data for a Typical Metrological Year (TMY) for region of Novi Sad, Belgrade cities and Kopaonik national park in Serbia. The purpose of the study is to design a realistic energy system that maximizes the use of renewable energy and minimizes the use of fossil fuels. The reduction in the CO2 emissions is also analyzed in the paper.

UNLABELLED AIM OF THIS STUDY was to examine the frequency of cervical cancer and cervical intraepithelial lesions of a different degree in women, corelation between cytologically diagnosed CIN I, CIN II and CIN III lesions and colposcopic findings and corelation between cytologic and pathohistologic findings of CIN III lesion. MATERIAL AND METHODS Cytologic and colposcopic findings have been analysed retrospectively in 2652 women who went through systematic examinations in Women's Health Care Department at Health Center "Dr.Mustafa Sehovic" Tuzla in period 2008-2011. For 93.2% (N = 2475) cytology results were normal. Abnormal cytology result was found in 6.71% (N = 178): CIN I in 5.54% (147), CIN II in 0.67% (18) and CIN III in 0.49% (13) of women examined. RESULTS AND DISCUSSION Colposcopy in women with cytology results CIN I, CIN II and CIN III showed abnormal result in women with CIN I in 29.9% (44/147), CIN II in 61.1% (11/18) and CIN III in 61.5% (8/13). Significant association between abnormal colposcopic and abnormal cytologic findings (Chi2 = 36.30, p < 0.0005). Abnormal colposcopic result is twice as often with CIN II and CIN III changes on cervix in relation to CIN I. Byopsy of cervix in 13 women with CIN III pathohistologicaly confirmed the diagnose in 46.1% (4/13), cervix lesion was of higher degree in 30.8%, and in 23.0% (3/13) lesion of cervix was of a lower degree. Abnormal colposcopic image is an indicator for the abnormal cytological result. CONCLUSION Systematic examination of women represents an efficient way of organized screening and prevention of cervical cancer.

Coronary artery spasm is one of the well-known causes of anginal chest pain. We presented the case of prolonged spasm of the left anterior descending coronary artery which happened during coronary angiography leading to pulse less state and low blood pressure with syncope and appearing of ventricular fibrillation on ECG. During one hour of successful cardiopulmonary resuscitation, the patient had again normal pulse and blood pressure. Coronary angiography performed immediately after DC's showed normal coronary angiogram. After two days the patient left the hospital without brain disorders.