Ecological marketing process management by means of PLM tools

U disertaciji je predložen model za upravljanje procesom eko marketinga, delovanjem na 4S kriterijume uspešnosti (održivost, bezbednost, društvena prihvatljivost i zadovoljstvo proizvodom). Razvijeni model je zasnovan na primeni alata LCA i Ekološki Ruksak i ima formu upravljačkog algoritma. Model je sistematično predstavljen, integralno i kroz analizu mogućih scenarija primene. Disertacija sadrži detaljan opis podloga na kojima je model razvijen. Verifikacija razvijenog modela je sprovedena kroz simulaciju izvršavanja algoritma na osnovu rezultata dobijenih primenom alata na dva plastična materijala: PLA i PET.The dissertation proposed a model for managing ecological marketing process by influencing on the 4S criteria of ecological marketing successfulness: Safety, Sustainability, Social acceptability and Satisfaction. The developed model is based on the application of two tools: LCA and Ecological Rucksack and has a control algorithm form. Model is presented in a systematically way, integrally and through an analysis of possible scenarios of application. The dissertation includes a detailed description of the backgrounds on which the model was developed. Verification of the model is carried out through simulation of execution of algoritam based on the results obtained by applying selected tools on two plastics materials: PLA and PET

DEVELOPMENT OF THE ALGORITHM FOR IMPLEMENTATION OF ENERGY-EFFICIENT COMPRESSED AIR SYSTEMS WITH ENERGY RECOVERY

In order to improve the energy efficiency of pneumatic systems, this paper presents an algorithm for the devlopment and implementation of an energy efficient pneumatic control system with energy recovery of compressed air. Two different ways of forming closed pneumatic circuits that reuse already used compressed air are presented. Compared to traditional pneumatic control, significant energy savings are achieved

PCM application in light construction buildings in various climates

Incorporating phase change materials (PCM) into building structures as passive latent heat thermal energy storage technologies offers a potential solution for reducing energy demand and regulating thermal comfort in occupied buildings. Integrating PCM into lightweight walls can improve their thermal performance by increasing building heat capacity and decreasing energy consumption. The effects of phase change materials (PCMs) added to the thermal envelope of lightweight residential containers on building thermal comfort are investigated in this study. The simulations were run for the summer period because it is difficult to achieve thermal comfort without using a lot of energy at that time. Thermal comfort is highly dependent on both, climatic conditions and the materials used to construct the building's thermal envelope, and the simulation was performed for weather conditions in five different geographic locations using TRNSYS simulation software. The paper examines the effects of PCM on indoor air temperature, specifically on reduction of maximum air temperature and temperature fluctuationsXII Međunarodna konferencija o društvenom i tehnološkom razvoju, Trebinje, 15-18. juni 2023

Morphological diversity of soybean in Maize Research Institute collection

Maize Research Institute Zemun Polje soybean collection is a small, local collection consisted of approximately 500 accessions from different regions of the world. Until now, there has been no systematic and precise evaluation of samples in the collection, as well as the assessment of genetic diversity. Genotype’s information is mainly limited to passport data, a description of several morphological traits and yield data. The aim of this study was to evaluate the level of phenotypic variation in collection on the sample of 90 accessions of different geographical origin. Morphological description was performed by screening of 16 traits according to the UPOV technical guideline for conducting of DUS tests in soybean. Diversity of morphological traits was estimated by Shannon diversity index. Morphological similarity of genotypes was estimated by the application of multivariate statistics models (analysis of homogeneity - HOMALS and cluster analysis). HOMALS analysis revealed the descriptors of high discriminatory power, with the greatest importance for genotype’s distinction: colour of the seed coat, intensity of pod colour, pubescence colour, and to a lesser extent the growth type. Genotypes were divided into six homogeneous and moderately separated groups with similar morphological profiles. Geographical component of morphological variability, as well as pedigree-based grouping could not be observed in pattern obtained by HOMALS. Cluster analysis showed a slightly different grouping model compared to the HOMALS analysis. All genotypes were grouped according to the colour of flower into two main clusters, and further into subgroups according to the type of growth and pubescence colour. Genotype’s positioning in subclusters did not correspond to their geographical origin. Consistency of clustering according to pedigree could be observed for individual pairs of genotypes or a small number of groups within subclusters. Despite the satisfactory level of morphological diversity of the collection revealed in the study, it is necessary to enrich the collection with new sources of variation to ensure continued success in breeding

The possibility of using polymer-based phase change materials for thermal energy storage

Phase change materials (PCM) are attractive energy storage technologies due to their high energy storage density and the ability to reversible absorb and release thermal energy at a nearly constant temperature. Polymers and polymer-based eutectic mixtures are promising PCMs. This study aims to investigate heat properties (melting temperature (Tm), latent heat (ΔH) and thermal conductivity(λ)) of potential PCMs based on polyethylene glycol polymer (PEG2000). We prepared following two and three components materials: PEG2000: ethylene glycol (5:6): PEG2000: PPG 400 (1:5); PEG2000: PPG400: Choline chloride (2:2:15); PEG2000: ethylene glycol (5:6); PEG2000: Glyoxal (5:2). The prepared three components material belong to deep eutectic solvents. Tm of the prepared materials are lower compared to pure PEG2000 (Tm = 57 ºC) e.g. Tm of PEG2000: PPG400: Choline chloride is 43 ºC. The determined melting enthalpies are also lower for prepared materials compared to PEG2000. This decrease is lower for eutectic mixture such as PEG2000: Choline chloride: ethylene glycol. We can conclude based on the obtained result that eutectic mixtures based on polymers are promising PCMs.XII Međunarodna konferencija o društvenom i tehnološkom razvoju, Trebinje, 15-18. juni 2023

The effect of phase-changing material thickness on light construction building indoor temperature

Due to the excessive use of air conditioners and heating systems, energy consumption by the builiding sector has been growing significantly in recent years, which leads to the accelerated depletion of conventional energy sources and to the fact that renewable energy sources are becoming more and more popular. Phase change materials are suitable for use in latent heat energy storage technology due to their high storage density and stable thermal properties. The thickness of phase change materials (PCMs) added to the thermal envelope of a lightweight building is investigated in this study. The simulations were run for 7 days in July, which was determined to be the hottest period of the summer based on the Meteonorm weather file, and when it is difficult to maintain thermal comfort without using a lot of energy. The thermal behavior of the building without PCM and with builtin PCM in the envelope of the building in one wall on the south side and on the ceiling, with different thicknesses of phase-changing material was simulated and the results obtained were analyzed with the aim of establishing which thickness of phase-changing material is optimal for installation in the envelope of the buildingThe 6th International Symposiumon Agricultural Engineering; Oct 19-21, Belgrade, 2023

Comparative phylogenetic analysis of Dobrava-Belgrade virus l and s genetic segments isolated from an animal reservoir in Serbia

The Dobrava-Belgrade virus (DOBV) is a member of the Bunyaviridae family, genus Hantavirus, possessing a single-stranded RNA genome consisting of three segments, designated L (large), M (medium) and S (small). In this study, we present phylogenetic analysis of a newly detected DOBV strain isolated from Apodemus agrarius. Analysis was based on partial L and S segment sequences, in comparison to previously published DOBV sequences from Serbia and elsewhere. A phylogenetic tree based on partial S segment revealed local geographical clustering of DOBV sequences from Serbia, unrelated to host (rodent or human). The topology of the phylogenetic tree was confirmed with a high percent of completely or partially resolved quartets in likelihood-mapping analysis, whereas no evidence of possible recombination in the examined S segment data set was found

Indoor temperatures affected by phase-change materials

Energy costs are rapidly rising around the world and it is important to find a way to reduce energy consumption. Energy consumption in buildings can account for up to 40% of total energy consumption in developed European countries due to an increase in living space per person, an increase in the need for air conditioning, an increase in the number of appliances used in households, and other factors. Due to the increasingly frequent high temperatures during the summer and the increase in electricity consumption, it is very important to find a way to decrease indoor temperatures in urban residential buildings without using more energy, given the severe energy crisis that has engulfed Europe and the high percentage of energy and electricity consumption in the residential sector. Installation of phase changeable materials is one method for improving the thermal envelope of a building by increasing the thermal capacity of the envelope and thus affecting the reduction of indoor temperature oscillations and, consequently, reduction of summer electricity consumption. In this study, the TRNSYS software package was used to simulate and compare the indoor air temperature in typical detached houses built in period 1946 and 1970 in the Belgrade area, for both, the case without and the case with installed phase change (PCM). It was shown that incorporating a PCM with a melting temperature of 25?C into the inter-floor construction of the house could significantly improve comfort conditions by reduce indoor temperature fluctuations during the warm period without consuming additional energy. When the temperature outside is around 30?C, the maximum air temperature in the house drops by about 2?C

Multivariate analysis of agronomic traits in mid-season soybean varieties

Principal Component Analysis (PCA) is a useful tool for processing multiple data, which are often encountered in breeding practice. This method is suitable for the evaluation of genotypes on the basis of multiple traits and graphical presentation of relationships between traits. This study included 16 soybean mid-season genotypes (maturity group I), originated from different regions of the world, maintained in soybean collection of Maize Research Institute Zemun Polje. Field trials were carried out at two locations, during two years, according to a RCB design with three replications. The genotypes were evaluated in respect to eight major agronomic traits: PH – plant height, NN – node number, PN – pod number, SN – seed number, TSW – 1000 seed weight, SYP – seed yield per plant, PROT – protein content, OIL – oil content. First two PCA axes encompassed a large portion of the variance of standardized data (75,9%). Biplot distinguished genotypes of potential importance for various breeding targets. Two genotypes stood out with the largest 1000 seed weight. One variety formed a larger number of pods and the seed number per plant as compared to the group average, achieving the highest grain yield per plant. Two genotypes were among the most productive ones, with a larger number of pods as well as a higher 1000 seed weight, compared to the average. The most promising variety was Laura, which had a high yield and higher protein content than the average, and could be used as a potential germplasm source for the simultaneous improvement of both traits. Correlations among traits determined by PC biplot were in accordance with Pearson’s correlation coefficients

Mogućnosti upotrebe džibre iz proizvodnje bioetanola na različitim supstratima

Stillage is a main by-product of the bioethanol industry and, depending on the origin of substrates for bioethanol production, it can be a significant pollutant affecting the profitability of bioethanol production. Directing the stillage towards the production of bio-based chemicals or high-quality feed is a preferred stra- tegy. In this paper, a complete utilization of stillages of different origins was assessed. Thin stillages from bioethanol production from molasses, wasted bread and corn were chemically characterized, evaluated and compared as substrates for lactic acid (LA) and probiotic biomass production by Lactobacil- lus rhamnosus ATCC 7469, while solid fractions of wasted bread and corn stil- lages were analyzed for feed. The impact of pH control using CaCO 3 or NaOH was also examined, both in terms of LA production and valorization of the remains generated in each process.A maximal LA productivity of 1.14 g/(L h) was obtained on thin wasted bread stillage with pH control by NaOH while the number of viable probiotic bacterial cells was above 109 CFU/mL. The com- position of the solid fraction of the wasted bread stillage was complementary with the needs of monogastric animals, while the solid fraction of corn stillage was more adequate for the nutritional requirements of ruminants.Džibra je najznačajniji otpadni ili sporedni proizvod industrije bioetanola. U zavisnosti od porekla supstrata koji se koriste u proizvodnji bioetanola, može biti značajan zagađivač, pa utiče na profitabilnost proizvodnje bioetanola. Upotreba džibre u biotehnološkim postupcima proizvodnje hemikalija ili visoko vredne stočne hrane je poželjna strategija za smanjenje negativnih efekata džibre na životnu sredinu i profitabilnost proizvodn je bioetanola. U ovom radu je analizirana mogućnost kompletnog iskorišćenja džibre. Tečne džibre iz proizvodnje bioetanola na melasi, otpadnom hlebu i kukuruzu su hemijski okarakterisane i upoređene kao supstrati za proizvodnju mlečne kiseline (MK) i probiotske biomase soja Lactobacillus rhamnosus ATCC 7469, dok je čvrsti ostatak hlebne i kukuruzne džibre analiziran kao hrana za životinje. Takođe je ispitan uticaj pH kontrole pomoću CaCO3 ili NaOH sa aspekta proizvodnje MK i sa aspekta iskorišćenja ostataka iz oba procesa. Maksimalna produktivnost MK od 1,14 g/(L h) je dobijena na tečnoj džibri iz otpadnog hleba sa pH kontorolom pomoću NaOH, dok je broj živih pro- biotskih bakterija bio preko 10 9 CFU/mL. Rezultati su pokazali da je sastav čvrste frak- cije otpadne hlebne džibre komplementaran sa potrebama monogastričnih životinja, dok sastav čvrste frakcije kukuruzne džibre više odgovara nutritivnim potrebama preživara