TY  - JOUR
AU  - Obradović, N.
AU  - Djordjević, N.
AU  - Peles, A.
AU  - Filipović, Suzana
AU  - Mitrić, M.
AU  - Pavlović, Vladimir
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3786
AB  - Due to its characteristics, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm(-2) (49-588 MPa). The sintering process was performed at 1350 degrees C for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics
EP  - 22
IS  - 1
SP  - 15
VL  - 47
DO  - 10.2298/SOS1501015O
ER  - 

@article{
author = "Obradović, N. and Djordjević, N. and Peles, A. and Filipović, Suzana and Mitrić, M. and Pavlović, Vladimir",
year = "2015",
abstract = "Due to its characteristics, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm(-2) (49-588 MPa). The sintering process was performed at 1350 degrees C for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics",
pages = "22-15",
number = "1",
volume = "47",
doi = "10.2298/SOS1501015O"
}

Obradović, N., Djordjević, N., Peles, A., Filipović, S., Mitrić, M.,& Pavlović, V.. (2015). The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 47(1), 15-22.
https://doi.org/10.2298/SOS1501015O

Obradović N, Djordjević N, Peles A, Filipović S, Mitrić M, Pavlović V. The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics. in Science of Sintering. 2015;47(1):15-22.
doi:10.2298/SOS1501015O .

Obradović, N., Djordjević, N., Peles, A., Filipović, Suzana, Mitrić, M., Pavlović, Vladimir, "The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics" in Science of Sintering, 47, no. 1 (2015):15-22,
https://doi.org/10.2298/SOS1501015O . .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, N.
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
AU  - Davidović, Vesna
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3427
AB  - A study was conducted to investigate the effects of a diet particle size on nutrient digestibility in cows in early lactation. Treatments were diets with forage to concentrate ratio 43:57% in diet dry matter, with four different physically effective fibres (peNDF) content based on different cut length of corn silage and alfalfa haylage. The physical effectiveness factors (pef) and peNDF content of TMRs (total mixed ration) were determined using Penn State Particle Separator (PSPS) with two (pef(8.0), peNDF(8.0)) or three (pef(1.18), peNDF(1.18)) sieves. The reducing of cut length of forages and particle size of diets did not affect on dry matter intake, while decreased peNDF intake by 16.34 and 8.83%, for peNDF(8.0) and peNDF(1.18) respectively. Apparent total tract digestibility of the nutrients was measured using two indicators: acid insoluble ash (AIA) and acid detergent insoluble lignin (ADL). Decreasing of forages cut length significantly increased apparent total tract digestibility of neutral detergent fibre (NDF) from 48.39% to 53.84% and from 53.9% to 58.66%, of crude protein from 73.96% to 79.24% and from 71.56% to 77.90%, with contemporary decreasing of non-fibre carbohydrate from 90.89% to 84.81% and from 91.99% to 86.80%, with AIA or ADL as indicator respectively. Dietary value of net energy for lactation (NEL) and energy intake was not affected by the peNDF content of the diet.
PB  - Wiley-Blackwell, Hoboken
T2  - Journal of Animal Physiology and Animal Nutrition
T1  - Effect of physical effectiveness on digestibility of ration for cows in early lactation
EP  - 721
IS  - 4
SP  - 714
VL  - 98
DO  - 10.1111/jpn.12129
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, N. and Božičković, Aleksa and Ivetić, Aleksandra and Davidović, Vesna",
year = "2014",
abstract = "A study was conducted to investigate the effects of a diet particle size on nutrient digestibility in cows in early lactation. Treatments were diets with forage to concentrate ratio 43:57% in diet dry matter, with four different physically effective fibres (peNDF) content based on different cut length of corn silage and alfalfa haylage. The physical effectiveness factors (pef) and peNDF content of TMRs (total mixed ration) were determined using Penn State Particle Separator (PSPS) with two (pef(8.0), peNDF(8.0)) or three (pef(1.18), peNDF(1.18)) sieves. The reducing of cut length of forages and particle size of diets did not affect on dry matter intake, while decreased peNDF intake by 16.34 and 8.83%, for peNDF(8.0) and peNDF(1.18) respectively. Apparent total tract digestibility of the nutrients was measured using two indicators: acid insoluble ash (AIA) and acid detergent insoluble lignin (ADL). Decreasing of forages cut length significantly increased apparent total tract digestibility of neutral detergent fibre (NDF) from 48.39% to 53.84% and from 53.9% to 58.66%, of crude protein from 73.96% to 79.24% and from 71.56% to 77.90%, with contemporary decreasing of non-fibre carbohydrate from 90.89% to 84.81% and from 91.99% to 86.80%, with AIA or ADL as indicator respectively. Dietary value of net energy for lactation (NEL) and energy intake was not affected by the peNDF content of the diet.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Journal of Animal Physiology and Animal Nutrition",
title = "Effect of physical effectiveness on digestibility of ration for cows in early lactation",
pages = "721-714",
number = "4",
volume = "98",
doi = "10.1111/jpn.12129"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A., Ivetić, A.,& Davidović, V.. (2014). Effect of physical effectiveness on digestibility of ration for cows in early lactation. in Journal of Animal Physiology and Animal Nutrition
Wiley-Blackwell, Hoboken., 98(4), 714-721.
https://doi.org/10.1111/jpn.12129

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A, Davidović V. Effect of physical effectiveness on digestibility of ration for cows in early lactation. in Journal of Animal Physiology and Animal Nutrition. 2014;98(4):714-721.
doi:10.1111/jpn.12129 .

Stojanović, Bojan, Grubić, Goran, Djordjević, N., Božičković, Aleksa, Ivetić, Aleksandra, Davidović, Vesna, "Effect of physical effectiveness on digestibility of ration for cows in early lactation" in Journal of Animal Physiology and Animal Nutrition, 98, no. 4 (2014):714-721,
https://doi.org/10.1111/jpn.12129 . .

TY  - JOUR
AU  - Peles, A.
AU  - Djordjević, N.
AU  - Obradović, N.
AU  - Tadić, N.
AU  - Pavlović, Vladimir
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3320
AB  - Mechanical activation is a commonly used and relatively fast and inexpensive procedure for sample preparation before the sintering process. Cordierite, a stoichiometric mixture of three different oxides (2MgO center dot 2Al(2)O(3)center dot 5SiO(2)) is a very attractive, widely used high-temperature ceramic material. The mechanical activation of the starting mixtures with 5.00 mass% TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm(2), based on our recent investigation. The sintering process was performed at 1350 degrees C for 2h and 4h in air atmosphere. X-ray diffraction was used to analyze the phase composition of non-activated and 80 min activated samples, sintered for 2 and 4h, respectively. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Influence of Prolonged Sintering Time on Density and Electrical Properties of Isothermally Sintered Cordierite-based Ceramics
EP  - 164
IS  - 2
SP  - 157
VL  - 45
DO  - 10.2298/SOS1302157P
ER  - 

@article{
author = "Peles, A. and Djordjević, N. and Obradović, N. and Tadić, N. and Pavlović, Vladimir",
year = "2013",
abstract = "Mechanical activation is a commonly used and relatively fast and inexpensive procedure for sample preparation before the sintering process. Cordierite, a stoichiometric mixture of three different oxides (2MgO center dot 2Al(2)O(3)center dot 5SiO(2)) is a very attractive, widely used high-temperature ceramic material. The mechanical activation of the starting mixtures with 5.00 mass% TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm(2), based on our recent investigation. The sintering process was performed at 1350 degrees C for 2h and 4h in air atmosphere. X-ray diffraction was used to analyze the phase composition of non-activated and 80 min activated samples, sintered for 2 and 4h, respectively. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Influence of Prolonged Sintering Time on Density and Electrical Properties of Isothermally Sintered Cordierite-based Ceramics",
pages = "164-157",
number = "2",
volume = "45",
doi = "10.2298/SOS1302157P"
}

Peles, A., Djordjević, N., Obradović, N., Tadić, N.,& Pavlović, V.. (2013). Influence of Prolonged Sintering Time on Density and Electrical Properties of Isothermally Sintered Cordierite-based Ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 45(2), 157-164.
https://doi.org/10.2298/SOS1302157P

Peles A, Djordjević N, Obradović N, Tadić N, Pavlović V. Influence of Prolonged Sintering Time on Density and Electrical Properties of Isothermally Sintered Cordierite-based Ceramics. in Science of Sintering. 2013;45(2):157-164.
doi:10.2298/SOS1302157P .

Peles, A., Djordjević, N., Obradović, N., Tadić, N., Pavlović, Vladimir, "Influence of Prolonged Sintering Time on Density and Electrical Properties of Isothermally Sintered Cordierite-based Ceramics" in Science of Sintering, 45, no. 2 (2013):157-164,
https://doi.org/10.2298/SOS1302157P . .

TY  - JOUR
AU  - Božičković, Aleksa
AU  - Grubić, Goran
AU  - Verbić, J.
AU  - Znidarsić, T.
AU  - Djordjević, N.
AU  - Stojanović, Bojan
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3295
AB  - The aim of the current work was to investigate the possibility of modifying the existing mean stage by weight (MSW) system for evaluating the average development stage in alfalfa. The modification was performed with the aim of providing a simplified system that may be used to evaluate the alfalfa development stage and to predict its nutritive value for ruminants. The suggested modification consists of designating an MSW value on the basis of the fresh weight of all morphological stages in a fresh green plant, as opposed to the original method which is based on weighing all morphological stages dried at 65 degrees C. The investigation was done on 141 samples of one alfalfa cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. On all collected samples the following characteristics were determined: MSW, modified MSW (mean stage by fresh weight (MSFW)), crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), crude ash (CA) and in vitro organic matter digestibility (IVOMD). For these characteristics of chemical composition (apart from CA) and nutritive value the regressions were calculated for their prediction based on MSW and MSFW. The regressions were derived for individual growth cycles and all cycles combined. A trend for an increase in the coefficient of determination (R-2) was identified as well as a decrease in root-mean-square error (RMSE) for all equations derived for all investigated characteristics from the spring growth to the second regrowth. A deviation from this trend was observed only in equations derived for IVOMD. A very high correlation was observed between MSW and MSFW (r=0.999). The determined R-2 and RMSE were very similar within the same growth cycle in all regressions for prediction of chemical composition and nutritive value derived for MSW and MSFW. Based on the results of this investigation the MSFW appears to be a quick and accurate method for determining the average development stage in alfalfa which can therefore be recommended for both scientific research and practical field use, as well as for prediction of its chemical composition and nutritive value.
PB  - Cambridge Univ Press, New York
T2  - Journal of Agricultural Science
T1  - A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value
EP  - 598
IS  - 4
SP  - 590
VL  - 151
DO  - 10.1017/S0021859613000129
ER  - 

@article{
author = "Božičković, Aleksa and Grubić, Goran and Verbić, J. and Znidarsić, T. and Djordjević, N. and Stojanović, Bojan",
year = "2013",
abstract = "The aim of the current work was to investigate the possibility of modifying the existing mean stage by weight (MSW) system for evaluating the average development stage in alfalfa. The modification was performed with the aim of providing a simplified system that may be used to evaluate the alfalfa development stage and to predict its nutritive value for ruminants. The suggested modification consists of designating an MSW value on the basis of the fresh weight of all morphological stages in a fresh green plant, as opposed to the original method which is based on weighing all morphological stages dried at 65 degrees C. The investigation was done on 141 samples of one alfalfa cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. On all collected samples the following characteristics were determined: MSW, modified MSW (mean stage by fresh weight (MSFW)), crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), crude ash (CA) and in vitro organic matter digestibility (IVOMD). For these characteristics of chemical composition (apart from CA) and nutritive value the regressions were calculated for their prediction based on MSW and MSFW. The regressions were derived for individual growth cycles and all cycles combined. A trend for an increase in the coefficient of determination (R-2) was identified as well as a decrease in root-mean-square error (RMSE) for all equations derived for all investigated characteristics from the spring growth to the second regrowth. A deviation from this trend was observed only in equations derived for IVOMD. A very high correlation was observed between MSW and MSFW (r=0.999). The determined R-2 and RMSE were very similar within the same growth cycle in all regressions for prediction of chemical composition and nutritive value derived for MSW and MSFW. Based on the results of this investigation the MSFW appears to be a quick and accurate method for determining the average development stage in alfalfa which can therefore be recommended for both scientific research and practical field use, as well as for prediction of its chemical composition and nutritive value.",
publisher = "Cambridge Univ Press, New York",
journal = "Journal of Agricultural Science",
title = "A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value",
pages = "598-590",
number = "4",
volume = "151",
doi = "10.1017/S0021859613000129"
}

Božičković, A., Grubić, G., Verbić, J., Znidarsić, T., Djordjević, N.,& Stojanović, B.. (2013). A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value. in Journal of Agricultural Science
Cambridge Univ Press, New York., 151(4), 590-598.
https://doi.org/10.1017/S0021859613000129

Božičković A, Grubić G, Verbić J, Znidarsić T, Djordjević N, Stojanović B. A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value. in Journal of Agricultural Science. 2013;151(4):590-598.
doi:10.1017/S0021859613000129 .

Božičković, Aleksa, Grubić, Goran, Verbić, J., Znidarsić, T., Djordjević, N., Stojanović, Bojan, "A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value" in Journal of Agricultural Science, 151, no. 4 (2013):590-598,
https://doi.org/10.1017/S0021859613000129 . .

TY  - JOUR
AU  - Obradović, N.
AU  - Djordjević, N.
AU  - Filipović, Suzana
AU  - Nikolić, N.
AU  - Kosanović, Darko
AU  - Mitrić, M.
AU  - Marković, S.
AU  - Pavlović, Vladimir
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2992
AB  - Due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 2.50 mass% Bi2O3 has been added to the starting mixtures. Liquid phase sintering caused by the presence of bismuth-oxide lowers the temperature of cordierite formation. The mechanical activation of the starting mixtures (0-56 min in vibro-mill) additionally lowers sintering temperatures. The sintering process was performed at 1200, 1300, 1350 and 1400 degrees C, for 2 h. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders and sintered materials was analyzed by the X-ray diffraction method. Furthermore, scanning electron microscopy (SEM) was used in the analysis of the powder morphology.
PB  - Elsevier, Amsterdam
T2  - Powder Technology
T1  - Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive
EP  - 161
SP  - 157
VL  - 218
DO  - 10.1016/j.powtec.2011.12.012
ER  - 

@article{
author = "Obradović, N. and Djordjević, N. and Filipović, Suzana and Nikolić, N. and Kosanović, Darko and Mitrić, M. and Marković, S. and Pavlović, Vladimir",
year = "2012",
abstract = "Due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 2.50 mass% Bi2O3 has been added to the starting mixtures. Liquid phase sintering caused by the presence of bismuth-oxide lowers the temperature of cordierite formation. The mechanical activation of the starting mixtures (0-56 min in vibro-mill) additionally lowers sintering temperatures. The sintering process was performed at 1200, 1300, 1350 and 1400 degrees C, for 2 h. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders and sintered materials was analyzed by the X-ray diffraction method. Furthermore, scanning electron microscopy (SEM) was used in the analysis of the powder morphology.",
publisher = "Elsevier, Amsterdam",
journal = "Powder Technology",
title = "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive",
pages = "161-157",
volume = "218",
doi = "10.1016/j.powtec.2011.12.012"
}

Obradović, N., Djordjević, N., Filipović, S., Nikolić, N., Kosanović, D., Mitrić, M., Marković, S.,& Pavlović, V.. (2012). Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive. in Powder Technology
Elsevier, Amsterdam., 218, 157-161.
https://doi.org/10.1016/j.powtec.2011.12.012

Obradović N, Djordjević N, Filipović S, Nikolić N, Kosanović D, Mitrić M, Marković S, Pavlović V. Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive. in Powder Technology. 2012;218:157-161.
doi:10.1016/j.powtec.2011.12.012 .

Obradović, N., Djordjević, N., Filipović, Suzana, Nikolić, N., Kosanović, Darko, Mitrić, M., Marković, S., Pavlović, Vladimir, "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive" in Powder Technology, 218 (2012):157-161,
https://doi.org/10.1016/j.powtec.2011.12.012 . .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, N.
AU  - Glamočić, Dragan M.
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3036
AB  - The study was conducted to investigate the effects of a total mixed ration (TMR) particle size on digestibility and production performances of the high-yielding cows in early lactation. The treatments were TMRs with forage-to-concentrate ratio 43:57 in diet dry matter, with four different mean particle lengths and physically effective fiber (PENDF) content based on different cut length of corn silage and alfalfa haylage. Determined values of PEF (physical effectiveness factor) and PENDF (through original and modified Penn State Particle Separator, PSPS) were considerably higher for forages and TMRs using the modified PSPS. The cut length of forage and particle size of TMRs did not affect dry matter intake. However reduced forage cut length significantly increased the apparent total tract digestibility of NDF (from 53.9 to 58.66%), and crude protein (from 71.56 to 77.90%), with the decrease in the non-fiber carbohydrate digestibility (from 91.99 to 86.80%). The increase in the milk yield (35.62 vs. 38.36 kg), and decrease in the milk fat (3.50 vs. 3.10%) and protein content (3.11 vs. 2.99%) were observed with the reduction of particle size in forages. There was no effect on milk fat daily yield, but the increase of the milk protein yield (1.08 vs. 1.15 kg) was determined with the reduced forage cut lengths. The milk fat to protein ratio had tendency to decrease with the reduced forage cut length. Decrease in forage particle size improved feed conversion ratio for milk production, improved digestibility and the milk yield, whereas milk protein content was reduced.
PB  - Spanish Natl Inst Agricultural & Food Research & Technolo, Madrid
T2  - Spanish Journal of Agricultural Research
T1  - Effects of different levels of physically effective fibers in diets for cows in early lactation
EP  - 107
IS  - 1
SP  - 99
VL  - 10
DO  - 10.5424/sjar/2012101-159-11
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, N. and Glamočić, Dragan M. and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2012",
abstract = "The study was conducted to investigate the effects of a total mixed ration (TMR) particle size on digestibility and production performances of the high-yielding cows in early lactation. The treatments were TMRs with forage-to-concentrate ratio 43:57 in diet dry matter, with four different mean particle lengths and physically effective fiber (PENDF) content based on different cut length of corn silage and alfalfa haylage. Determined values of PEF (physical effectiveness factor) and PENDF (through original and modified Penn State Particle Separator, PSPS) were considerably higher for forages and TMRs using the modified PSPS. The cut length of forage and particle size of TMRs did not affect dry matter intake. However reduced forage cut length significantly increased the apparent total tract digestibility of NDF (from 53.9 to 58.66%), and crude protein (from 71.56 to 77.90%), with the decrease in the non-fiber carbohydrate digestibility (from 91.99 to 86.80%). The increase in the milk yield (35.62 vs. 38.36 kg), and decrease in the milk fat (3.50 vs. 3.10%) and protein content (3.11 vs. 2.99%) were observed with the reduction of particle size in forages. There was no effect on milk fat daily yield, but the increase of the milk protein yield (1.08 vs. 1.15 kg) was determined with the reduced forage cut lengths. The milk fat to protein ratio had tendency to decrease with the reduced forage cut length. Decrease in forage particle size improved feed conversion ratio for milk production, improved digestibility and the milk yield, whereas milk protein content was reduced.",
publisher = "Spanish Natl Inst Agricultural & Food Research & Technolo, Madrid",
journal = "Spanish Journal of Agricultural Research",
title = "Effects of different levels of physically effective fibers in diets for cows in early lactation",
pages = "107-99",
number = "1",
volume = "10",
doi = "10.5424/sjar/2012101-159-11"
}

Stojanović, B., Grubić, G., Djordjević, N., Glamočić, D. M., Božičković, A.,& Ivetić, A.. (2012). Effects of different levels of physically effective fibers in diets for cows in early lactation. in Spanish Journal of Agricultural Research
Spanish Natl Inst Agricultural & Food Research & Technolo, Madrid., 10(1), 99-107.
https://doi.org/10.5424/sjar/2012101-159-11

Stojanović B, Grubić G, Djordjević N, Glamočić DM, Božičković A, Ivetić A. Effects of different levels of physically effective fibers in diets for cows in early lactation. in Spanish Journal of Agricultural Research. 2012;10(1):99-107.
doi:10.5424/sjar/2012101-159-11 .

Stojanović, Bojan, Grubić, Goran, Djordjević, N., Glamočić, Dragan M., Božičković, Aleksa, Ivetić, Aleksandra, "Effects of different levels of physically effective fibers in diets for cows in early lactation" in Spanish Journal of Agricultural Research, 10, no. 1 (2012):99-107,
https://doi.org/10.5424/sjar/2012101-159-11 . .

TY  - JOUR
AU  - Obradović, N.
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir
AU  - Mitrić, M.
AU  - Marković, S.
AU  - Mitić, V.
AU  - Djordjević, N.
AU  - Ristić, M.M.
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2686
AB  - Mixtures of BaCO3-ZnO-TiO2 were mechanically activated using high-energy planetary ball mill during 20, 40 and 80 min. As the time of mechanical activation increased, the decrease in particle size was observed. The effect of milling on microstructure was investigated by scanning electron microscopy, as well. Sintering process was performed in air at 1100 and 1200 C for 2 h. Various phases are present within mixtures sintered at 1100 and 1200 degrees C, and almost pure BaZn2Ti4O11 phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Isothermal sintering of barium-zinc-titanate ceramics
EP  - 27
IS  - 1
SP  - 21
VL  - 37
DO  - 10.1016/j.ceramint.2010.07.001
ER  - 

@article{
author = "Obradović, N. and Filipović, Suzana and Pavlović, Vladimir and Mitrić, M. and Marković, S. and Mitić, V. and Djordjević, N. and Ristić, M.M.",
year = "2011",
abstract = "Mixtures of BaCO3-ZnO-TiO2 were mechanically activated using high-energy planetary ball mill during 20, 40 and 80 min. As the time of mechanical activation increased, the decrease in particle size was observed. The effect of milling on microstructure was investigated by scanning electron microscopy, as well. Sintering process was performed in air at 1100 and 1200 C for 2 h. Various phases are present within mixtures sintered at 1100 and 1200 degrees C, and almost pure BaZn2Ti4O11 phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Isothermal sintering of barium-zinc-titanate ceramics",
pages = "27-21",
number = "1",
volume = "37",
doi = "10.1016/j.ceramint.2010.07.001"
}

Obradović, N., Filipović, S., Pavlović, V., Mitrić, M., Marković, S., Mitić, V., Djordjević, N.,& Ristić, M.M.. (2011). Isothermal sintering of barium-zinc-titanate ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 37(1), 21-27.
https://doi.org/10.1016/j.ceramint.2010.07.001

Obradović N, Filipović S, Pavlović V, Mitrić M, Marković S, Mitić V, Djordjević N, Ristić M. Isothermal sintering of barium-zinc-titanate ceramics. in Ceramics International. 2011;37(1):21-27.
doi:10.1016/j.ceramint.2010.07.001 .

Obradović, N., Filipović, Suzana, Pavlović, Vladimir, Mitrić, M., Marković, S., Mitić, V., Djordjević, N., Ristić, M.M., "Isothermal sintering of barium-zinc-titanate ceramics" in Ceramics International, 37, no. 1 (2011):21-27,
https://doi.org/10.1016/j.ceramint.2010.07.001 . .

TY  - JOUR
AU  - Djermanović, Vladan
AU  - Mitrović, S.
AU  - Djordjević, N.
AU  - Novaković, M.
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2210
AB  - The investigation included 5 stallions (average age of 10.40 years) and 33 mares (average age of 10.33 years) with pedigree of the English Thoroughbred horse breed that are used for breeding on the Stud Farm Ljubicevo - Serbia. The investigation of some significant properties relating to the exterior (at stallions) and reproductive ones (at mares) were carried out in the year 2009. The following average exterior (body) measures of the stallions: the body mass (474.80 kg), withers height (160.46 cm), trunk or body length (161.88 cm), breast circumference (187.96 cm) and tibia circumference (19.22 cm) were within the standards of this horse breed of the age. The gestation period at mares, regardless the sex of a colt, averagely lasted 337.70 days. With the mares having had a male colt, the gestation lasted a little bit longer (338.92 days) than with the mares having had female colts (336.90 days). The difference in the gestation duration (2.02 days) was not statistically significant (P>0.05). Between the age of the mares and the gestation duration (regardless the sex of a colt) it was found a positive slight correlation (rp=0.320). Furthermore, between the age of the mares and the gestation duration it was found medium (rp=0.453) correlation at male colts, and quite poor correlation (rp=0.202) at female colts. Found coefficients of the phenotype correlation were not statistically confirmed (P>0.05).
AB  - Istraživanjima je obuhvaćeno 5 pastuva (prosečne starosti 10,40 godina) i 33 kobile (prosečne starosti 10,33 godina) sa poznatim poreklom (pedigreom) engleske punokrvne rase konja koja se na ergeli Ljubičevo - Srbija aktivno koriste u priplodu. Utvrđivanja važnijih eksterijernih (pastuvi), odnosno reproduktivnih svojstava (kobile) sprovedena su u 2009. godini. Utvrđene prosečne eksterijerne (telesne) mere pastuva: telesna masa (474,80 kg), visina grebena (160,46 cm), dužina trupa - tela (161,88 cm), obim grudi (187,96 cm) i obim cevanice (19,22 cm) su bile u okviru standarda ove rase konja u odgovarajućoj starosnoj dobi. Bremenitost (gestacija) kobila, bez obzira na pol ždrebeta, u proseku je trajala 337,70 dana. Kod kobila koje su oždrebile mušku ždrebad bremenitost je trajala nešto duže (338,92 dana), nego kod kobila koje su oždrebile žensku ždrebad (336,90 dana). Razlika u trajanju bremenitosti (2,02 dana) nije bila statistički signifikantna (P>0,05). Između starosti kobila i trajanja bremenitosti (bez obzira na pol ždrebeta) utvrđena je pozitivna slaba korelaciona povezanost (rp=0,320). Zatim, između starosti kobila i trajanja bremenitosti utvrđena je srednja (rp=0,453) korelaciona povezanost kod muške ždrebadi, odnosno jako slaba (rp=0,202) kod ženske ždrebadi. Utvrđeni koeficijenti fenotipske korelacije nisu bili statistički potvrđeni (P>0,05).
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Some significant exterior and reproductive properties of the English Thoroughbred horse population from the stud farm 'Ljubicevo', Serbia
T1  - Važnija eksterijerna i reproduktivna svojstva populacije engleskog punokrvnog konja gajenog na ergeli 'Ljubičevo', Srbija
EP  - 82
IS  - 1-2
SP  - 75
VL  - 26
DO  - 10.2298/BAH1002075D
ER  - 

@article{
author = "Djermanović, Vladan and Mitrović, S. and Djordjević, N. and Novaković, M.",
year = "2010",
abstract = "The investigation included 5 stallions (average age of 10.40 years) and 33 mares (average age of 10.33 years) with pedigree of the English Thoroughbred horse breed that are used for breeding on the Stud Farm Ljubicevo - Serbia. The investigation of some significant properties relating to the exterior (at stallions) and reproductive ones (at mares) were carried out in the year 2009. The following average exterior (body) measures of the stallions: the body mass (474.80 kg), withers height (160.46 cm), trunk or body length (161.88 cm), breast circumference (187.96 cm) and tibia circumference (19.22 cm) were within the standards of this horse breed of the age. The gestation period at mares, regardless the sex of a colt, averagely lasted 337.70 days. With the mares having had a male colt, the gestation lasted a little bit longer (338.92 days) than with the mares having had female colts (336.90 days). The difference in the gestation duration (2.02 days) was not statistically significant (P>0.05). Between the age of the mares and the gestation duration (regardless the sex of a colt) it was found a positive slight correlation (rp=0.320). Furthermore, between the age of the mares and the gestation duration it was found medium (rp=0.453) correlation at male colts, and quite poor correlation (rp=0.202) at female colts. Found coefficients of the phenotype correlation were not statistically confirmed (P>0.05)., Istraživanjima je obuhvaćeno 5 pastuva (prosečne starosti 10,40 godina) i 33 kobile (prosečne starosti 10,33 godina) sa poznatim poreklom (pedigreom) engleske punokrvne rase konja koja se na ergeli Ljubičevo - Srbija aktivno koriste u priplodu. Utvrđivanja važnijih eksterijernih (pastuvi), odnosno reproduktivnih svojstava (kobile) sprovedena su u 2009. godini. Utvrđene prosečne eksterijerne (telesne) mere pastuva: telesna masa (474,80 kg), visina grebena (160,46 cm), dužina trupa - tela (161,88 cm), obim grudi (187,96 cm) i obim cevanice (19,22 cm) su bile u okviru standarda ove rase konja u odgovarajućoj starosnoj dobi. Bremenitost (gestacija) kobila, bez obzira na pol ždrebeta, u proseku je trajala 337,70 dana. Kod kobila koje su oždrebile mušku ždrebad bremenitost je trajala nešto duže (338,92 dana), nego kod kobila koje su oždrebile žensku ždrebad (336,90 dana). Razlika u trajanju bremenitosti (2,02 dana) nije bila statistički signifikantna (P>0,05). Između starosti kobila i trajanja bremenitosti (bez obzira na pol ždrebeta) utvrđena je pozitivna slaba korelaciona povezanost (rp=0,320). Zatim, između starosti kobila i trajanja bremenitosti utvrđena je srednja (rp=0,453) korelaciona povezanost kod muške ždrebadi, odnosno jako slaba (rp=0,202) kod ženske ždrebadi. Utvrđeni koeficijenti fenotipske korelacije nisu bili statistički potvrđeni (P>0,05).",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Some significant exterior and reproductive properties of the English Thoroughbred horse population from the stud farm 'Ljubicevo', Serbia, Važnija eksterijerna i reproduktivna svojstva populacije engleskog punokrvnog konja gajenog na ergeli 'Ljubičevo', Srbija",
pages = "82-75",
number = "1-2",
volume = "26",
doi = "10.2298/BAH1002075D"
}

Djermanović, V., Mitrović, S., Djordjević, N.,& Novaković, M.. (2010). Some significant exterior and reproductive properties of the English Thoroughbred horse population from the stud farm 'Ljubicevo', Serbia. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 26(1-2), 75-82.
https://doi.org/10.2298/BAH1002075D

Djermanović V, Mitrović S, Djordjević N, Novaković M. Some significant exterior and reproductive properties of the English Thoroughbred horse population from the stud farm 'Ljubicevo', Serbia. in Biotechnology in Animal Husbandry. 2010;26(1-2):75-82.
doi:10.2298/BAH1002075D .

Djermanović, Vladan, Mitrović, S., Djordjević, N., Novaković, M., "Some significant exterior and reproductive properties of the English Thoroughbred horse population from the stud farm 'Ljubicevo', Serbia" in Biotechnology in Animal Husbandry, 26, no. 1-2 (2010):75-82,
https://doi.org/10.2298/BAH1002075D . .

TY  - CONF
AU  - Djordjević, N
AU  - Dinić, Bora
AU  - Grubić, Goran
AU  - Vučković, Savo
AU  - Simić, A
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1003
AB  - The ensiling experiment with Phacelia tanacetifolia Benth. was done in experimental silos with volumes of 60 dm(3) and organized as a three-factorial layout (2 x 2 x 2), where factor A was the vegetation phase of phacelia (the budding phase or the end of flowering phase), factor B was without or with lucerne, ratio 1 : 1, and factor C was phacelia without or with fertilizer, N = 45 kg ha(-1) Maize meal 5% was added to all silages. Silages from phacelia cut at the budding phase and at flowering, had on average lower pH values (5.37 : 5.89), lower lactic acid (26.47 : 60.53 g kg(-1) DM), lower acetic acid (59.57 : 73.72 g kg(-1) DM), and higher butyric acid (15.54 : 0.11 g kg(-1) SM), respectively. The addition of lucerne produced a high effect on acid content (P  lt  0.05). Silages made from phacelia and lucerne had lower pH values (4.99 : 6.28), higher lactic acid (62.20 : 24.80 g kg(-1) DM) content, and contained no butyric acid (0.00 : 15.65 g kg(-1) DM). Nitrogen fertilization of phacelia had no effect on silage quality. The addition of lucerne increased the content of crude protein, and decreased the contents of crude fibre and ash. According to the DLG method (1997), ensiling the material after flowering produces better silage and improves its quality, while combining with lucerne improves the quality to an even greater extent.
PB  - Estonian Grassland Soc-Egs, Tartu
C3  - Integrating Efficient Grassland Farming and Biodiversity
T1  - The quality and chemical composition of Phacelia tanacetifolia Benth. and lucerne silages
EP  - 297
SP  - 294
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1003
ER  - 

@conference{
author = "Djordjević, N and Dinić, Bora and Grubić, Goran and Vučković, Savo and Simić, A",
year = "2005",
abstract = "The ensiling experiment with Phacelia tanacetifolia Benth. was done in experimental silos with volumes of 60 dm(3) and organized as a three-factorial layout (2 x 2 x 2), where factor A was the vegetation phase of phacelia (the budding phase or the end of flowering phase), factor B was without or with lucerne, ratio 1 : 1, and factor C was phacelia without or with fertilizer, N = 45 kg ha(-1) Maize meal 5% was added to all silages. Silages from phacelia cut at the budding phase and at flowering, had on average lower pH values (5.37 : 5.89), lower lactic acid (26.47 : 60.53 g kg(-1) DM), lower acetic acid (59.57 : 73.72 g kg(-1) DM), and higher butyric acid (15.54 : 0.11 g kg(-1) SM), respectively. The addition of lucerne produced a high effect on acid content (P  lt  0.05). Silages made from phacelia and lucerne had lower pH values (4.99 : 6.28), higher lactic acid (62.20 : 24.80 g kg(-1) DM) content, and contained no butyric acid (0.00 : 15.65 g kg(-1) DM). Nitrogen fertilization of phacelia had no effect on silage quality. The addition of lucerne increased the content of crude protein, and decreased the contents of crude fibre and ash. According to the DLG method (1997), ensiling the material after flowering produces better silage and improves its quality, while combining with lucerne improves the quality to an even greater extent.",
publisher = "Estonian Grassland Soc-Egs, Tartu",
journal = "Integrating Efficient Grassland Farming and Biodiversity",
title = "The quality and chemical composition of Phacelia tanacetifolia Benth. and lucerne silages",
pages = "297-294",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1003"
}

Djordjević, N., Dinić, B., Grubić, G., Vučković, S.,& Simić, A.. (2005). The quality and chemical composition of Phacelia tanacetifolia Benth. and lucerne silages. in Integrating Efficient Grassland Farming and Biodiversity
Estonian Grassland Soc-Egs, Tartu., 10, 294-297.
https://hdl.handle.net/21.15107/rcub_agrospace_1003

Djordjević N, Dinić B, Grubić G, Vučković S, Simić A. The quality and chemical composition of Phacelia tanacetifolia Benth. and lucerne silages. in Integrating Efficient Grassland Farming and Biodiversity. 2005;10:294-297.
https://hdl.handle.net/21.15107/rcub_agrospace_1003 .

Djordjević, N, Dinić, Bora, Grubić, Goran, Vučković, Savo, Simić, A, "The quality and chemical composition of Phacelia tanacetifolia Benth. and lucerne silages" in Integrating Efficient Grassland Farming and Biodiversity, 10 (2005):294-297,
https://hdl.handle.net/21.15107/rcub_agrospace_1003 .

TY  - CONF
AU  - Vučković, Savo
AU  - Simić, A
AU  - Djordjević, N
AU  - Živanović, Tomislav
AU  - Stojanović, I
AU  - Stanisavljević, R
PY  - 2005
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1002
AB  - The research was carried out on the Sjenica-Pester plateau in 2002-2003 on a natural Cynosuretum cristati type meadow, at Vrujci, which is 1158 m above sea level. Five nitrogen fertilizer levels (0, 40, 80, 120 and 160 kg ha(-1)) and red clover and birdsfoot trefoil was underseeded. The data showed a favourable effect of nitrogen fertilizer on increasing DM yield, crude protein, ash and fat content and a negative effect on cellulose content. The maximum DM yield was recorded when 160 kg ha(-1) nitrogen was applied and the yield amounted to 4.44 t ha(-1) for two years (increase of 2.03 t ha(-1) or 85.0% over the control). Increasing the rate of nitrogen increased the protein content, ash, fat, and reduced the cellulose. The DM yield from the underseeded legumes was minimal in the wet year but was significantly higher over the control in the dry testing year. Underseeding did not improved the chemical composition.
PB  - Estonian Grassland Soc-Egs, Tartu
C3  - Integrating Efficient Grassland Farming and Biodiversity
T1  - Effect of nitrogen fertilizer and underseeding on the productivity and chemical composition of Cynosuretum cristati type meadows on hilly-mountainous grasslands in Serbia
EP  - 492
SP  - 489
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1002
ER  - 

@conference{
author = "Vučković, Savo and Simić, A and Djordjević, N and Živanović, Tomislav and Stojanović, I and Stanisavljević, R",
year = "2005",
abstract = "The research was carried out on the Sjenica-Pester plateau in 2002-2003 on a natural Cynosuretum cristati type meadow, at Vrujci, which is 1158 m above sea level. Five nitrogen fertilizer levels (0, 40, 80, 120 and 160 kg ha(-1)) and red clover and birdsfoot trefoil was underseeded. The data showed a favourable effect of nitrogen fertilizer on increasing DM yield, crude protein, ash and fat content and a negative effect on cellulose content. The maximum DM yield was recorded when 160 kg ha(-1) nitrogen was applied and the yield amounted to 4.44 t ha(-1) for two years (increase of 2.03 t ha(-1) or 85.0% over the control). Increasing the rate of nitrogen increased the protein content, ash, fat, and reduced the cellulose. The DM yield from the underseeded legumes was minimal in the wet year but was significantly higher over the control in the dry testing year. Underseeding did not improved the chemical composition.",
publisher = "Estonian Grassland Soc-Egs, Tartu",
journal = "Integrating Efficient Grassland Farming and Biodiversity",
title = "Effect of nitrogen fertilizer and underseeding on the productivity and chemical composition of Cynosuretum cristati type meadows on hilly-mountainous grasslands in Serbia",
pages = "492-489",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1002"
}

Vučković, S., Simić, A., Djordjević, N., Živanović, T., Stojanović, I.,& Stanisavljević, R.. (2005). Effect of nitrogen fertilizer and underseeding on the productivity and chemical composition of Cynosuretum cristati type meadows on hilly-mountainous grasslands in Serbia. in Integrating Efficient Grassland Farming and Biodiversity
Estonian Grassland Soc-Egs, Tartu., 10, 489-492.
https://hdl.handle.net/21.15107/rcub_agrospace_1002

Vučković S, Simić A, Djordjević N, Živanović T, Stojanović I, Stanisavljević R. Effect of nitrogen fertilizer and underseeding on the productivity and chemical composition of Cynosuretum cristati type meadows on hilly-mountainous grasslands in Serbia. in Integrating Efficient Grassland Farming and Biodiversity. 2005;10:489-492.
https://hdl.handle.net/21.15107/rcub_agrospace_1002 .

Vučković, Savo, Simić, A, Djordjević, N, Živanović, Tomislav, Stojanović, I, Stanisavljević, R, "Effect of nitrogen fertilizer and underseeding on the productivity and chemical composition of Cynosuretum cristati type meadows on hilly-mountainous grasslands in Serbia" in Integrating Efficient Grassland Farming and Biodiversity, 10 (2005):489-492,
https://hdl.handle.net/21.15107/rcub_agrospace_1002 .