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Introduction of the interdependence between the glutathione half-cell reduction potential and thermodynamic parameters during accelerated aging of maize seeds
VESNA D. DRAGI？EVI？,SLOBODANKA D. SREDOJEVI？,MIHAJLO B. SPASI？
Journal of the Serbian Chemical Society , 2010,
Abstract: Two maize hybrids with a different ability to maintain seed germination were examined during the course of accelerated aging (AA). Initially, the similar seed reduction potential of the GSSG/2GSH half-cell increased in H1 (dent hybrid) without influencing the seed germination ability up to the 6th day of AA, while in H2 (sweet corn hybrid), it was not changed up to the 6th day of AA but with a significant later loss of seed germination ability. During the AA course, the amount of free thiol decreased in H1 and increased in H2. Irrespective of the continual increase of the differential Gibbs energy during AA, the characteristics of the examined hybrids are possibly connected to the different metabolic pathways of the seeds: H1 is characterised by higher entropy and positive enthalpy values, while H2 had negative entropy values and a decreasing trend of enthalpy, indicating a shift of the system from a relatively ordered to a disordered state. The different types of nanomolecular switches, re-sulting in a faster decrease of GSH in the H2 than in the H1 hybrids, indicate that a combination of the GSSG/2GSH half-cell potential and thermodynamics could be a useful tool to quantify plant stress.
The growth of maize seedlings as function of free energy and redox potential
Dragi？evi？ Vesna D.,Sredojevi？ Slobodanka D.,Spasi？ Mihajlo B.
Journal of Agricultural Sciences , 2010, DOI: 10.2298/jas1003217d
Abstract: The difference in the growth of maize seedlings originating from seeds injured by accelerated ageing, as well as those altered by restoring with low 2,4-D (2,4-dichlorophenoxyacetic acid) concentrations was examined, from the point of view of free energy and redox potential. The ageing decreased germination ability, the seedling growth and free energy, with no remarkable influence on the redox capacity. Meanwhile, the 2,4-D treatment increased the germination percentage and the seedling growth, by better energy utilisation, with shifting of the redox balance to a reducing environment. From this point of view, the free energy and the redox potential are useful tools for the determination of biological vitality.
Validation study of a rapid colorimetric method for the determination of phytic acid and inorganic phosphorus from seeds
Dragi？evi？ Vesna D.,Sredojevi？ Slobodanka D.,Peri？ Vesna A.,Ni？avi？ Anika R.
Acta Periodica Technologica , 2011, DOI: 10.2298/apt1142011d
Abstract: Phytate, as an important mineral storage compound in seeds, is vital for seed/grain development; it is often considered to be an antinutritional substance. The objective of this study was to develop a rapid and inexpensive colorimetric method of measuring phytate and inorganic P (Pi) concentrations from maize, soybean and sunflower seed/grain extracts, by combining adequate precision and simplicity, ideal for breeders interested in improving simultaneously Pi and phytate levels. The investigated extraction mediums: double distilled (DD) H2O, 2.4 % HCl and 5 % trichloracetic acid (TCA) were proved to be suitable for the analysis of phytic acid and inorganic phosphorus in seed extracts. The advantages of 5 % TCA over to DD H2O and 2.4 % HCl were reflected through the low limit of detection for both phytic acid and Pi and good recovery with low bias. A low detection limit for Pi is important for samples with naturally low Pi concentrations, such as soybean seeds.
The variation of phytic and inorganic phosphorus in leaves and grain in maize populations
Dragi？evi？ Vesna,Kova？evi？ Dragan,Sredojevi？ Slobodanka,Dumanovi？ Zoran
Genetika , 2010, DOI: 10.2298/gensr1003555d
Abstract: The phytate function in plants is still not completely understood: it is the primary storage P form in seeds that is utilized during germination and early seedling development. Approaches to resolve problem of the bad nutritive quality of grain phytate include engineering of crops with reduced levels of seed phytic acid. The objective of this study was to investigate genetic variability and correlation of phytic (Pphy) and inorganic phosphorus (Pi) and soluble proteins among 28 maize populations, consisted into three groups: low-, intermediate- and high-phytic populations, with the aim to determine the potential of enhancing the P profile of maize plants and high grain yield through selection. The highest genetic variability of Pi and Pphy content in leaves was expressed in group with intermediate Pphy content in grain. Meanwhile, leaves of low-phytic populations were characterized with low Pphy, too (averagely 18%) and high content of soluble proteins (averagely 15%) in relation to high- and intermediate-phytic populations. Additionally, the lowest genetic variability of protein content was also noticeable in leaves of low-phytic populations. Positive correlation between Pi and protein content was observed in leaves of low- and high-phytic populations. The negative correlation between Pphy and Pi was detected in maize grain, but correlation was significant only in intermediate-phytic group. The highest, but not significant, average yield was observed in group of low-phytic populations, as well as its relative high genetic variability. That indicates that development of high yielding genotypes with lower phytate in grain is reasonable, and could be potentially useful in enhancing the sustainability and decreasing of environmental impact in agricultural production.
Genetic variation of phytate and ionorganic phosphorus in maize population
Mladenovi？-Drini？ Sne？ana,Risti？ Danijela,Sredojevi？ Slobodanka,Dragi？evi？ Vesna
Genetika , 2009, DOI: 10.2298/gensr0901107m
Abstract: Analysis of 60 maize populations was conducted to identify genotypes that had either low or high concentration of phytate. Genetic variability in seed phytate content was observed, with values ranging from 1,147 to 4, 13 g kg-1. Inorganic phosphorus (Pi) concentrations were between 0, 35 and 1, 29 and averaged 0, 65 g kg-1. Three groups of populations were identified as having low, intermediate and high phytate content. The low phytate concentration was measured in eight, intermediate in 25 and high in 27 populations. Positive correlation was found between phytate and protein. Population 216 had the lowest phytate concentration of 1, 14 gkg-1, and a Pi concentration 40% greater than Pi mean but lower than average protein content. This population will be used for further breeding genotypes with low phytate content and good agronomic traits.
Police response to domestic violence: Theoretical framework and foreign experiences
Konstantinovi？-Vili？ Slobodanka D.,Petru？i？ Nevena
Temida , 2005, DOI: 10.2298/tem0501003k
Abstract: This paper is dedicated to recognizing police work and intervention in the cases of domestic violence. Keeping in mind the relationship between the offender and the victim in the cases of domestic violence, seriousness of the consequences, as well as the fact that, during the intervention, police is the first state agency which “disturbs” the sphere of family privacy, it is very important to study the way police is reacting, establish the degree of its efficiency and explore the factors that determine the efficiency of police intervention. The paper points out the policy of police response to domestic violence in some foreign systems (Great Britain, USA, Australia). Particular attention is paid to consideration of activities police is dealing with while collecting the data on the violence, victim and the offender, the way police is reacting in order to prevent new violence, as well as the responsibility and aims police has during the intervention.
Intellectual property and regulation of functional foods
Jovanovi？ Slobodanka,Petrovi？ Slobodan D.,Sikora Sonja
Industrija , 2012,
Abstract: Today, there exist scientific evidences that functional foods have favorable physiological and psychological effects as well as additional functions in relation to health, apart from the basic nutritional effects, thus offering the potential of enhance health or reduced the risk of diseases. Since interest in this category of foods has increased, new products have appeared as well as the need to introduce and set up standards and guidelines for the development and promotion of such foods. Technological development in this area and involvement of great multinationals in research investment and development of new products have reinforced the importance of the intellectual property rights, especially of patent protections and trademarks.
The Neo- tokavian accent shift and the phonological significance of suprasegmental features in different tokavian dialects. Accoustic and phonetic analysis
Dejan Sredojevi？,Ljiljana Suboti？
Baltistica , 2011,
Abstract:
Hemijski sastav i kalori？na vrednost mesa ribnja？arskih ？arana (Cyprinus carpio L.)
Jevti？, Jelena,Sredojevi？, Lazar
- , 1974,
Abstract: Hr？ak ID: 12069
Kompleksna savremena tehnologija uzgoja ？arana - garancija visokih prinosa
Sredojevi？, Ing. Lazar
- , 1972,
Abstract: Hr？ak ID: 8706
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