The Potential Application of Selected Fungi Strains in Removal of Commercial Detergents and Biotechnology

The consumption of synthetic detergents is increasing year by year due to increasing urbanization, which reflects on higher concentration of this pollutant in the environment. In order to purify wastewaters from different pollutants, the application of new technologies such as bioremediation is necessary. From the environmental point of view, it is important to identify microorganisms that are tolerant to the presence of this pollutant. This chapter presents the experimental evaluation of ability of several fungal species, isolated from municipal sewage and industrial wastewater, in removing a high detergent concentration (anionic surfactants) from the environment as well as their potential application in biotechnology. The selected fungi were cultivated in Czapek-Dox liquid medium supplemented with commercial detergent “Merix” (Henkel, Kruševac, Serbia). Changes of physicochemical and biochemical parameters such as pH, redox potential, dry weight biomass, and enzymes activities such as alkaline protease and phosphatase were evaluated during 16 days of cultivation. The obtained results could be useful in the implementation of tested fungi in bioremediation processes and in biotechnology

Medievalism in contemporary Fantasy: a new Species of Romance

Contemporary fantasists are often inspired by the texts from and with medieval context. This paper taps into Horace Walpole’s principles revealed in the preface to The Castle of Otranto to show that the works of medieval fantasy and contemporary fantasy subgenres written in 20th and 21st centuries have a lot in common with Walpole’s recipe for creating ‘a new species of romance’. When considered from the present time, the Medieval period can be seen as being halfway between fantasy and reality, in a blurry area where the two overlap, and contemporary fantasists use this trait to build their fictional worlds as effective reverberators of universal themes that remain interesting, appealing and worth repeating

A SURVEY OF SUBJECTIVE OPINIONS OF POPULATION ABOUT SEISMIC RESISTANCE OF RESIDENTIAL BUILDINGS

The unpredictability and the seriousness of the potential earthquake consequences for people and residential buildings in Serbia imply the need for improving the resilience of local communities. The paper presents the results of a quantitative research regarding the level and factors of influence on the awareness of citizens about the seismic resistance of their residential buildings to earthquake consequences. Multiple-point random sampling was used to survey 1,018 citizens (face to face) during 2017 in 8 local communities: Kraljevo, Lazarevac, Jagodina, Mionica, Prijepolje, Vranje, Lapovo and Kopaonik. The questionnaire consisted of two segments: questions on demographic, socio-economic and psychological characteristics of respondents and questions regarding resistance of residential buildings to earthquake consequences. The results show that 35% of respondents state that they live in residential buildings that are not resistant to earthquakes, while 70.7% state that they live in buildings built of reinforced concrete, which are considered safe. Beside that 9.2% of respondents examined the resistance of their facilities to earthquake consequences. Inferential statistical analyses show that men to a greater extent than women state that their buildings are resistant to earthquake consequences. Starting from the multidimensionality of citizen vulnerability to earthquakes, it is necessary to conduct additional studies and further elucidate the sociological dimension of vulnerability and resilience.

Household supplies for natural disaster: factor of influence on the possession of supplies

Purpose –The paper presents the results of the quantitative research of the impact of certain factors on household possession of supplies necessary for the survival of the consequences of natural disasters. Design/methodology/approach – Quantitative research was conducted by using a survey strategy in households with the use of a multi-stage random sample. The first step, which was related to the primary sampling units, included selection of parts of the community for conducting research. The second step, which was related to research cores, included selection of streets or parts of streets at the level of primary sampling units, and finally a selection of households for surveying 2500 citizens in 19 local communities. Findings –It was found that only 24.6% of the respondents have supplies, while 61.5% have no supplies for surviving natural disasters. On the other hand, 37.2% of the respondents possess supplies of food for 4 days, while only 12% have supplies of food for 1 day. It was found that 17.6% of the respondents have a transistor radio, 40% a flashlight, 40.6% a shovel, 25.8% a hack, 33.6% hoe and spade, and 13.2% a fire extinguisher. The results of the inferential statistical analyses show that there is a statistically significant influenceof gender, education, marital status, parenthood, employment, income level, level of religiosity, completed military service on having supplies to survive the consequences of natural disasters. On the other hand, there was no influence of previous experiences on having supplies. Originality/value –research results allow the design of strategies aimed at raising the level of preparedness of households for natural disasters with regard to their supplies

Distributed control of manufacturing resources: Security related issues

Paradigma industrije 4.0 diktira visoko efikasnu i fleksibilnu proizvodnju uvođenjem konfigurabilnih proizvodnih sistema i resursa koji odlikuju modularnost, interoperabilnost, skalabilnost i mogućnosti komunikacije. Trenutno se širom sveta istražuju različiti pristupi u nastojanju da se dostigne sledeći nivo proizvodnih tehnologija bez ugrožavanja same proizvodnje. Razmatrani pristupi podrazumevaju implementaciju Ciber Phisical Sistem-a, Interneta stvari i generacije proizvodnih sistema Digital Tvins. Složeni industrijski upravljački sistemi, koji su tradicionalno ožičeni i smatraju se sigurnim, sada postaju distribuirani, povezani na internet, obično se zasnivaju na bežičnoj komunikaciji i širom su otvoreni za sve vrste zlonamjernih podviga s potencijalno fatalnim posledicama. U ovom radu predstavljen je pregled bezbednosnih pitanja koja su ključna za razvoj sigurnije bežične distribucije kontrole proizvodnih resursa, pogodnih za izazove u narednim vremenima.Industry 4.0 paradigm dictates highly efficient and flexible production through introduction of reconfigurable manufacturing systems and resources characterized by modularity, interoperability, scalability and communication capabilities. Various approaches are currently researched worldwide in an effort to achieve the next level of production technologies without compromising the production itself. Considered approaches imply implementation of Cyber Physical Systems, Internet of Things and generation of manufacturing systems Digital Twins. Complex industrial control systems, which were traditionally wired and considered safe, are now becoming distributed, internet-connected, usually based on wireless communication and wide open for all kinds of malicious exploits with potentially fatal consequences. This paper presents a review of security related issues that are crucial in developing safer wireless distributed control of manufacturing resources, ADEPT for challenges in coming times

Floods in the Republic of Serbia-Vulnerability and Human Security

Vulnerability and human security have been changing over time and depended on the physical, social, economic and environmental factors. In modern terms these phenomena have become multi-dimensional, multi-disciplinary, multi-sectoral and dynamic. However, in addition to empirical changes with respect to the nature of security threats, the increase of vulnerability and threatening to human security, there have increased the analytical range in their understand-ing as well as the institutional changes within the security structures. Many countries have aban-doned the attitude that the floods and flash floods as the most important natural hazards can be suppressed or controlled, i.e. that can be fought against or placed under full control. With that regard, the attitude of adoptive management of security and rescue from floods and flash floods be-comes more and more prevalent, as well as flood risk adjustment or the principle of “living with floods”. Accepting such attitude, relating cultural values of the society, economy, institutional and functional possibilities for the purpose of mitigating vulnerability and providing human security proved prominent in the Republic of Serbia. The state has taken a series of reform steps in view of recognizing its own physical exposure to food risks. At the same time, after such great floods which endangered a large part of the country’s territory, the country recognized its social-eco-nomic weaknesses of the community, as well as the necessity to increase the capacity to mobilize the resources in mitigating vulnerability and facilitating human security

Distributed control of manufacturing resources: Security related issues

Paradigma industrije 4.0 diktira visoko efikasnu i fleksibilnu proizvodnju uvođenjem konfigurabilnih proizvodnih sistema i resursa koji odlikuju modularnost, interoperabilnost, skalabilnost i mogućnosti komunikacije. Trenutno se širom sveta istražuju različiti pristupi u nastojanju da se dostigne sledeći nivo proizvodnih tehnologija bez ugrožavanja same proizvodnje. Razmatrani pristupi podrazumevaju implementaciju Ciber Phisical Sistem-a, Interneta stvari i generacije proizvodnih sistema Digital Tvins. Složeni industrijski upravljački sistemi, koji su tradicionalno ožičeni i smatraju se sigurnim, sada postaju distribuirani, povezani na internet, obično se zasnivaju na bežičnoj komunikaciji i širom su otvoreni za sve vrste zlonamjernih podviga s potencijalno fatalnim posledicama. U ovom radu predstavljen je pregled bezbednosnih pitanja koja su ključna za razvoj sigurnije bežične distribucije kontrole proizvodnih resursa, pogodnih za izazove u narednim vremenima.Industry 4.0 paradigm dictates highly efficient and flexible production through introduction of reconfigurable manufacturing systems and resources characterized by modularity, interoperability, scalability and communication capabilities. Various approaches are currently researched worldwide in an effort to achieve the next level of production technologies without compromising the production itself. Considered approaches imply implementation of Cyber Physical Systems, Internet of Things and generation of manufacturing systems Digital Twins. Complex industrial control systems, which were traditionally wired and considered safe, are now becoming distributed, internet-connected, usually based on wireless communication and wide open for all kinds of malicious exploits with potentially fatal consequences. This paper presents a review of security related issues that are crucial in developing safer wireless distributed control of manufacturing resources, ADEPT for challenges in coming times

Transformacija azota u kiselim zemljištima pri promeni pH vrednosti

The aim of this investigation was to determine which application of fertilizer and lime material does not form toxic quantities of nitrite nitrogen and when the losses by denitrification are the lowest in the examined acid soils. Investigations were performed on pseudogley soils of different acidity. Changes of available nitrogen forms were examined by the method of short-term incubation experiments. Experimental treatments were without the use of mineral fertilizers and with application of (NH4)2SO4 (100 ppm of NO3-N) and KNO3 (100 ppm of NO3-N); with and without addition of Ca(OH)2 (50% of full neutralization and full neutralization). When (NH4)2SO4 was used, nitrites occurred in both examined soils as a result of decelerated nitrification and when KNO3 was added as a result of chemical denitrification. Application of Ca(OH)2 caused the intensification of mineralization, nitrification and biological denitrification processes. When a higher dose of lime material was used (full neutralization), nitrites occurred in larger quantities as a result of the strengthening of nitrification and denitrification processes. Application of a lower lime dose caused nitrite occurrence in smaller quantities. Therefore, in these soils as well as in soils of similar chemical properties, application of lower doses of lime material can be recommended ( lt 50% of full neutralization) as well as the application of ammonium fertilizer, bearing in mind that in such conditions losses of added fertilizer in the denitrification process are reduced and the occurrence of nitrites as an intermediate product of this process is prevented.Istraživanja su obavljena na pseudoglejnom zemljištu različite kiselosti. Cilj ovih istraživanja je bio da se utvrdi pri kojoj primeni đubriva i krečnog materijala se ne obrazuju toksične količine nitrita i kada su gubici azota denitrifikacijom najmanji. Primenom amonijum sulfata, kod oba ispitivana zemljišta, obrazovali su se nitriti kao posledica usporene nitrifikacije a pri dodatku kalijum nitrata nitriti su nastajali usled biološke i hemijske denitrifikacije. Pri primeni viših doza Ca(OH)2 (puna neutralizacija) nitriti su se javljali u većim količinama kao rezultat jačanja procesa nitrifikacije i denitrifikacije, dok je pri nižim dozama krečnog materijala količina obrazovanih nitrita bila manja. Radi sprečavanja pojave nitrita i smanjenja gubitaka azota procesom denitrifikacije, kod ovakvih i zemljišta sličnih hemijskih svojstava, može se preporučiti primena amonijačnih đubriva i upotreba nižih doza krečnog materijala

Snabdevenost važnijih tipova zemljišta Srbije osnovnim alkalnim elementima Ca, Mg, K i Na

In this paper results are presented of agrochemical and mineralogical analyses of 14 types of important soils in Serbia (Vojvodina and Central Serbia) and total content and availability of base alkali elements (Ca, Mg Na, K) are determined. Total element content was as follows: Ca 2.22%; K 1.77%; Na 0.85% and Mg 0.61%. Total content of alkali metals in the soils investigated and their variations within and between the soil types, is in very good/close correlation with contents of primary and secondary minerals as well as their rates of weathering. Taking in account the average availabilities the most abundant is calcium with 947 mg/100 g, whilst the averages of the other elements (Mg, K and Na) are quite similar and are about of 40 mg/100 g of soil. The results obtained have shown that the soils investigated are well to moderate provided with K, Ca and Mg and that their deficit could not be expected in plant nutrition, apart for some plants/cultures in the case of magnesium due to occasionally higher Ca/Mg and K/Mg ratios.U ovom radu je ispitivano 100 reprezentativnih uzoraka 14 tipova zemljišta Srbije (Vojvodina, Šumadija i Severno Pomoravlje) u pogledu ukupnog i pristupačnog sadržaja osnovnih alkalnih metala (Ca, Mg, K i Na). Takođe je prikazan i prosečan mineraloški sastav ispitivanih zemljišta. Nađeni su sledeći srednji ukupni sadržaji ispitivanih elemenata: Ca - 2,25%; K - 1,77% Na - 0,85% i Mg - 0,61%. Ukupni sadržaji ispitivanih alkalnih metala u našim zemljištima i njihova vapipanja između i unutar zemljišnih tipova u uskoj su vezi sa zastupljenošću određenih primarnih i sekundarnih minerala i njihovom otpornošću na raspadanje. Prema srednjim vrednostima za pristupačne sadržaje najviše ima kalcijuma (947 mg/100 g), a srednji sadržaji za ostale baze (Mg K i Na) su vrlo slični i kreću ce oko 40 mg/100 g. Dobijeni rezultati pokazuju da su ispitivana zemljišta dobro i srednje obezbeđena K, Ca i Mg i da se ne mogu očekivati njihovi deficiti za ishranu biljaka, osim za neke kulture u slučaju magnezijuma, zbog ponekad suviše povišenih odnosa Ca/Mg i K/Mg