Obtained levels of reduction of all tested microorganisms present good base for the production of safe osmotically dehydrated products of animal origin.
Accurate and easy to use Farm Management Information Systems (FMIS)
The effects of yeast extract addition, with varied quantities of salt and sugar, on the chemical and mineral composition, colour and sensory properties of spelt bread, in order to obtain new products were investigated. The addition of 5 % yeast extract positively influenced the mineral characteristics and increased protein content by 30.77 %. As a salt substitution, addition of yeast extract improved appearance without deteriorating texture descriptors and breadcrumb quality, while the taste became more complex, but without increasing salty taste. Addition of sugar in samples with yeast extract, improved most sensory characteristics. The developed mathematical models of bread with yeast extract quality parameters were statistically significant, indicating the satisfactory approximation of the bread quality parameters within the varied formula. Bread samples with addition of 5 % yeast extract, 1.5 % of salt and 0 % sugar were determined as the best from the aspect of overall quality. A new product was obtained with good total quality, higher level of nutritional value and reduced salt content.
The subject of this paper is analysis of the tendencies and forecast of the prices of most significant vegetable crops in Serbia: potato, bean, tomato, pepper, onion, cabbage and watermelon. The aim of the paper is to forecast the absolute prices of the studied vegetables. Time series analysis of vegetable prices expressed in euro per ton (2002-17) was performed by means of descriptive statistics, while adequate ARIMA models were used for price forecasting (2018-22). The analysis of the studied vegetable crops showed that bean had the highest average annual price, while watermelon had the lowest. The price of tomato showed the highest fluctuations over the years, while the lowest were for onion and cabbage. All vegetable crops showed a tendency of absolute increase in prices expressed in euro. Based on the foregoing, it can be concluded that the market position of vegetables is generally improving, but oscillations will continue to occur.
This paper examines the annual average price of two basic and economically most important cereals in Serbia: wheat and maize. The purpose of this research is to predict the future pricing trends on the basis of the wheat and maize price analysis over a longer period of time.Firstly, the average annual prices expressed in dinars per ton were converted into the prices expressed in EUR. Subsequently, the prices thus obtained were processed using descriptive statistics, and utilized to make predictions for the next five years . The predictions were made using the ARIMA model.The forecast obtained indicates that the prices of maize will not be as stable as those of wheat. In the forecast period, the maize price will range from EUR 127.5 to 134 per ton. In the last two years of the period under consideration, the price of maize will stabilize at around EUR 132 per ton. REZIMEPredmet istraživanja u ovom radu su prošečne godišnje cene dve osnovne i ekonomski najvažnije žitarice u Srbiji: pšenice i kukuruza. Cilj istraživanja je da se na bazi analize cena pšenice i kukuruza u dužem vremenskom periodu predvidi njihovo kretaćnje u budućnosti. U prvom koraku, prosečne godišnje cene koje su izražene u dinarima po toni, prevedene su u cene izražene u evrima. Podaci o prosečnim cenama dobijeni su iz statističkih publikacija, a podaci o prosečnoj vrednosti evra u period od 2002. do 2017. godine od Narodne banke Srbije. Ovako izražene cene prvo su obrađene na osnovu deskriptivne statistike, a zatim su predviđene njihove vrednosti za narednih pet godina . Predviđanje je srovedeno pomoću ARIMA modela. Kada je u pitanju cena pšenice, deskriptivna analiza je pokazala da je prosečna cena pšenice iznosila 135,30 evra/toni, a po godinama se kretala u interval od 90,50 (2005.godine) do 190,85 evra/toni (2012). Cena pšenice pokazuje tendenciju porasta u analiziranom period po prosečnoj godišnjoj stopi od 1,34%. Predviđanje pokazuje relativno stabilnu cenu pšenice koja će se kretati oko 139 evra po toni. Deskriptivna analiza cene kukuruza je pokazala da je prosečna godišnja cena kukuruza iznosila 123,90 evra/t. Po godinama analiziranog perioda kretala se u interval od 77,84 (2006.godine) do 184,04evra/t (2012). I cena kukuruza pokazuje tendenciju porasta po prosečnoj godišnjoj stopi od 2,53%. Predviđanje pokazuje da cena kukuruza nije stabilna kao cena pšenice. U predikcionom period ona se kreće u intervalu od 127,5 do 134 evra/toni. U poslednje dve godine cena kukuruza će se stabilizovati na nivou od oko 132 evra/toni.
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