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Assessment of the Trophic Status by monitoring of Reservoir’s Water Quality

Journal of Water Resource and Protection 2015年第1期7卷 1-13页

作者： milka m.vidovic marko N.Rodic marija U.vidovic Ivana S.Trajkovic Sanja Z.Jovanic Department for Ecology and Technoeconomics The Institute of ChemistryTechnology and MetallurgyUniversity of BelgradeBelgradeSerbia Faculty of Geography University of BelgradeBelgradeSerbia School of Electrical Engineering University of BelgradeBelgradeSerbia

Continuous long-term monitoring of aquatic systems is important for understanding their complete evolution in order to monitor changes in the trophic status and water quality. The continuous monitoring during a period of 20 years, by sampling once a month at two locations, the water quality of reservoir “Grliste”, which is used for the water supplying town Zajecar (Eastern Serbia), is observed and developmental stages in the life of the reservoir were determinated. It should be noted that the obtained results were used also in the purpose of finding a cause of cyanobacteria bloom, as a consequence of algal production. Limiting factors of algal production usually were nitrogen and phosphorus, however, in this study, obtained results of subtraction between trophic state index, calculated through total chlorophyll a (TSIChl-a) and trophic state index, calculated through total phosphorus (TSITP), indicated that limiting factor of algal production was light. On the basis of the concentrations of dissolved oxygen (DO), total phosphorus (TP) and chlorophyll a (Chl-a) in the surface and in the bottom, it was concluded that the reservoir passed through four development phases during the examined period. Results of long-term monitoring showed that in the first years after the formation of the reservoir, the highest trophicity was detected (hypereutrophic status), but later the reservoir mostly maintained eutrophic status.

关键词： monitoring Reservoir Trophic State Index Eutrophication Cyanobacteria

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Removal of manganese and Iron from Groundwater in the Presence of Hydrogen Sulfide and Ammonia

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Journal of Water Resource and Protection 2014年第19期6卷 1781-1792页

作者： milka m.vidovic Ivana S.Trajkovic Sasa S.Rogan Vladimir m.Petrovic Sanja Z.Jovanic Department of Ecology and Technoeconomics The Institute of ChemistryTechnology and MetallurgyUniversity of BelgradeBelgradeSerbia

Presence of iron and manganese in water not only affects the organoleptic properties of water, but also can cause a number of problems in drinking water treatments. Their removal in drinking water preparation processes becomes more complicated in the presence of hydrogen sulfide and ammonia in water. There are certain commercialized products at the market that are used for removal of manganese, iron and ammonia, but it is of crucial importance to establish an appropriate order of removal in the technological process during drinking water treatment. Through the various combinations of commercialized filtration media, the removal of iron, manganese, hydrogen sulfide and ammonia, was being examined and on the basis of obtained results their effectiveness was estimated. Research results have shown that hydrogen sulfide is pollutant that causes problems during the adsorption in removing manganes. Ammonia, which is bonded to hydrogen sulphide influences the volume of treated water when it comes to removing the iron and manganese. Decrease in the concentration of hydrogen sulfide at the entrance to Filtersorb FmH for four times, has led to an increase in the volume of treated water in the amount of two times, followed by the breakthrough point of concentration of manganese. For complete usage capacity of commercialized products for the removal of these pollutants, finding their mutual bond in compounds which are present in the water, is of the importance.

关键词： Hydrogen Sulfide Ammonia Iron manganese Adsorption

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modeling challenges and potential solutions for integration of emerging DERs in DmS applications: power flow and short-circuit analysis

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Journal of modern Power Systems and Clean Energy 2019年第6期7卷 1365-1384页

作者： Luka V.STREZOSKI Nikola R.VOJNOVIC Vladimir C.STREZOSKI Predrag m.vidovic marija D.PRICA Kenneth A.LOPARO Case School of Engineering Case Western Reserve UniversityClevelandUSA Faculty of Technical Sciences University of Novi SadNovi SadSerbia

We aim to systematically review challenges imposed by emerging distributed energy resources(DERs)to model in two basic distribution management system(DmS)online applications—power flow and short-circuit analysis,as well as to offer a systematic review of potential *** the last decade,electronically coupled DERs became increasingly *** can employ a wide range of control strategies for power,current,or voltage control,in both normal and faulted ***,DERs cannot be modeled with the traditional PQ(load or generator bus)or PV(generator bus)bus types used for modeling synchronous and induction machines in online power flow ***,since fault currents of DERs are limited to predefined maximal values,electronically coupled DERs cannot be represented with traditional voltage source behind impedance models for online short-circuit calculation(SCC).However,most of the DmS software packages still use the traditional models to represent all DER types,including those that are electronically *** paper shows that there will be large calculation errors in such practice,which make the system model an inadequate representation of the *** will lead to serious errors in the management,control,and operation of distribution ***,potential solutions to the challenges are systematically ***,the calculation results on a distribution test system with all DER types are used to prove the claim.

关键词： Distributed energy resources(DERs) Distribution management system(DmS) Power flow modeling Short-circuit modeling

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Reduction of Trihalomethanes Forming Potential by Adsorption of Natural Organic matter on Ionic Exchange Resins

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Journal of Water Resource and Protection 2010年第2期2卷 137-142页

作者： milka m. vidovic Boban milovanovic Ivana S. Trajkovic Jelena G. momic Ilija Tomic 不详

In a sanitation process of drinking water, carbon from the organic matter reacts with chlorine, forming by-products, among which are trihalomethanes (THm). These substances are carriers of mutagenic and can-cerogenic potential and hence should be removed in drinking water treatment. Since the natural organic mat-ters are precursors of THm formation, their removal from the water decreases the concentration of THms. The THm forming potential is the most reliable indicator in evaluation of organic matter removal during drinking water treatment processes. The results have shown that the reaction producing THms follows sec-ond order kinetics. The second order rate constant ranged from 0.024 m-1s-1 to 0.065 m-1s-1 at 22 °C and pH = 8.2 for 96 hours. The removal of 78.4% of natural organic matter, by adsorption on anionic exchange res-ins, resulted in the THm forming potential reduction by 63.1%. Various fractions of natural organic matter differ in their reactivity with chlorine, which is important when it comes to selection of the adsorption me-dium in the drinking water treatment processes.

关键词： Natural Organic matter Trihalomethanes Disinfection by Chlorine Ground Water

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Experience and lessons from health impact assessment guiding prevention and control of HIV/AIDS in a copper mine project,northwestern Zambia

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Infectious Diseases of Poverty 2017年第1期6卷 1023-1033页

作者： Astrid m.Knoblauch mark J.Divall milka Owuor Kennedy Nduna Harrison Ng’uni Gertrude musunka Anna Pascall Jürg Utzinger mirko S.Winkler Swiss Tropical and Public Health Institute P.O.BoxCH-4002 BaselSwitzerland University of Basel P.O.BoxCH-4003 BaselSwitzerland SHAPE Consulting Ltd. GY12 St Peter PortChannel IslandsGuernseyUK Solwezi District Health management Team 40100 SolweziZambia First Quantum minerals Limited 10100 LusakaZambia

Background:To avoid or mitigate potential project-related adverse health effects,the Trident copper project in Kalumbila,northwestern Zambia,commissioned a health impact *** was identified a priority health issue based on the local vulnerability to HIV transmission and experience from other mining projects in ***,an HIV/AIDS management plan was developed,including community and workplace interventions,with HIV testing and counselling(HTC)being one of the key *** present trends in HTC data over a 4-year ***:In 13 communities affected by the Trident project,HTC was implemented from 2012 onwards,using rapid diagnostic tests,accompanied by pre-and post-test counselling through trained *** addition,HTC was initiated in the project workforce in 2013,coinciding with the launch of the mine *** uptake and HIV positivity rates were assessed in the study population and linked to demographic factors using regression ***:In total,11,638 community members and 5564 workers have taken up HTC with an increase over *** HIV positivity rate in the community was 3.0%in 2012 and 3.4%in 2015,while positivity rate in the workforce was 5.2%in 2013 and 4.3%in *** showed a significantly higher odds of having a positive test result than males(odds ratio(OR)=1.96,95%confidence interval(CI):1.55-2.50 among women in the community and OR=2.90,95%CI:1.74-4.84 among women in the workforce).HTC users in the 35-49 years age group were most affected by HIV,with an average positivity rate of 6.6%in the community sample and 7.9%in the workforce *** study groups had 4.50 and 4.95 higher odds of being positive,respectively,compared to their younger counterparts(15-24 years).Conclusions:While HTC uptake increased five-fold in the community and almost three-fold in the workplace,the HIV positivity rates were insignificantly higher in 2015 compared to *** data can be used alongside other surveillance data to

关键词： Community health management Health impact assessment HIV mining Occupational health Sexually transmitted infections Zambia

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Bypassing major venous occlusion and duodenal lesions in rats, and therapy with the stable gastric pentadecapeptide BPC 157, L-NAmE and L-arginine

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World Journal of Gastroenterology 2018年第47期24卷 5366-5378页

作者： Fedor Amic Domagoj Drmic Zdenko Bilic Ivan Krezic Helena Zizek marina Peklic Robert Klicek Alen Pajtak Enio Amic Tinka vidovic mislav Rakic marija milkovic Perisa Katarina Horvat Pavlov Antonio Kokot Ante Tvrdeic Alenka Boban Blagaic mario Zovak Sven Seiwerth Predrag Sikiric Department of Pharmacology Medical Faculty University of Zagreb Department of Pathology Medical Faculty University of Zagreb

AIm To investigate whether duodenal lesions induced by major venous occlusions can be attenuated by BPC 157 regardless nitric oxide(NO) system *** male Wistar rats underwent superior anterior pancreaticoduodenal vein(SAPDV)-ligation and were treated with a bath at the ligated SAPDV site(BPC 157 10 μg, 10 ng/kg per 1 mL bath/rat; L-NAmE 5 mg/kg per 1 m L bath/rat; L-arginine 100 mg/kg per 1 mL bath/rat, alone and/or together; or BPC 157 10 μg/kg instilled into the rat stomach, at 1 min ligation-time). We recorded the vessel presentation(filled/appearance or emptied/disappearance) between the 5 arcade vessels arising from the SAPDV on the ventral duodenum side, the inferior anterior pancreaticoduodenal vein(IAPDV) and superior mesenteric vein(SmV) as bypassing vascular pathway to document the duodenal lesions presentation; increased NO-and oxidative stress [malondialdehyde(mDA)]-levels in *** Unlike the severe course in the SAPDV-ligated controls, after BPC 157 application, the rats exhibited strong attenuation of the mucosal lesions and serosal congestion, improved vessel presentation, increased interconnections, increased branching by more than 60% from the initial value, the IAPDV and SmV were not congested. Interestingly, after 5 min and 30 min of L-NAmE and L-arginine treatment alone, decreased mucosal and serosal duodenal lesions were observed; their effect was worsened at 24 h, and no effect on the collateral vessels and branching was seen. Together, L-NAmE+L-arginine antagonized each other's response, and thus, there was an NO-related effect. With BPC 157, all SAPDV-ligated rats receiving L-NAmE and/or L-arginine appeared similar to the rats treated with BPC 157 alone. Also, BPC 157 in SAPDV-ligated rats normalized levels of NO and mDA, two oxidative stress markers, in duodenal *** BPC 157, rapidly bypassing occlusion, rescued the original duodenal flow through IAPDV to SmV flow, aneffect related to the NO system and

关键词： major venous occlusion Duodenal lesions BPC 157 L-NAmE Bypassing L-arginine Reduction of free radical formation Rats

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Stable gastric pentadecapeptide BPC 157 in the treatment of colitis and ischemia and reperfusion in rats: New insights

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World Journal of Gastroenterology 2017年第48期23卷 8465-8488页

作者： Antonija Duzel Josipa Vlainic marko Antunovic Dominik malekinusic Borna Vrdoljak mariam Samara Slaven Gojkovic Ivan Krezic Tinka vidovic Zdenko Bilic mario Knezevic marko Sever Nermin Lojo Antonio Kokot marijan Kolovrat Domagoj Drmic Jaksa Vukojevic Tamara Kralj Katarina Kasnik marko Siroglavic Sven Seiwerth Predrag Sikiric Departments of Pharmacology and Pathology Medical Faculty University of Zagreb medical Faculty J.J.Strossmayer University of Osijek OsijekCroatia Rudjer Boskovic Institute Department of Molecular Medicine

AIm To provide new insights in treatment of colitis and ischemia and reperfusion in rats using stable gastric pentadecapeptide BPC 157. mETHODS medication [BPC 157,L-NAmE,L-arginine(alone/combined),saline] was bath at the blood deprived colon segment. During reperfusion,medication was BPC 157 or saline. We recorded(USB microscope camera) vessel presentation through next 15 min of ischemic colitis(ICrats) or reperfusion(removed ligations)(IC + RL-rats);oxidative stress as mDA(increased(IC-and IC + RLrats)) and NO levels(decreased(IC-rats);increased(IC + RL-rats)) in colon tissue. IC + OB-rats [IC-rats had additional colon obstruction(OB)] for 3 d(IC + OBrats),then received BPC 157 bath. RESULTS Commonly,in colon segment(25 mm,2 ligations on left colic artery and vein,3 arcade vessels within ligated segment),in IC-,IC + RL-,IC + OB-rats,BPC 157(10 μg/kg) bath(1 m L/rat) increased vessel presentation,inside/outside arcade interconnections quickly reappeared,mucosal folds were preserved and the pale areas were small and markedly reduced. BPC 157 counteracted worsening effects induced by L-NAmE(5 mg) and L-arginine(100 mg). mDA-and NO-levels were normal in BPC 157 treated IC-rats and IC + RLrats. In addition,on day 10,BPC 157-treated IC + OBrats presented almost completely spared mucosa with very small pale areas and no gross mucosal defects;the treated colon segment was of normal diameter,and only small adhesions were *** BPC 157 is a fundamental treatment that quickly restores blood supply to the ischemically injured area and rapidly activates collaterals. This effect involves the NO system.

关键词： Ischemic colitis Blood flow rescue Collaterals BPC 157 L-NAmE L-arginine Oxidative stress NO Rats

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