- Email: [email protected]
Researches regarding the breeding stage of the Romanian Spotted Cattle in Brasov area
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Abstracts / Journal of Biotechnology 231S (2016) S4–S109
scanning calorimeter (DSC). Denaturation temperature of EW protein increased while denaturation enthalpy decreased indicating that proteins were denatured during ozone treatment. Ozone treatment influenced the foam stability of EW proteins more than foaming ability. An improvement in the foaming properties of EW proteins was observed. The increase in foam volume and foam stability of EW proteins solutions was 1.1 and 1.8, respectively. http://dx.doi.org/10.1016/j.jbiotec.2016.05.236 Effects of ozone treatment on some functional properties of whey protein Senol Ibanoglu ∗ , Esra Ibanoglu, Hicran Uzun Gaziantep University, Food Engineering Dept., Gaziantep, Turkey E-mail address: [email protected] (S. Ibanoglu). Ozone received the GRAS (generally recognized as safe) status for use as disinfectant and sanitizer since 1997. There are many applications of ozone in the food industry such as food surface hygiene, sanitation of food plant equipment, reuse of waste water, cleaning of shellfish and disinfection of poultry carcasses and chill water in the poultry industry, increasing shelf-life of fruit and vegetables. Proteins influence the functional properties in foods such as solubility, emulsion and foam formation. In present study, effects of ozone treatment on some functional properties of whey protein isolate (WPI) were investigated. WPI was chosen since it has been extensively used in food products to improve textural, functional and sensory attributes. Ozone treatment of WPI was performed either in aqueous solutions or as gas ozonation of pure protein powders. Ozone treatment influenced foam formation and stability extensively. Although the foam volume of WPI increased 2.25 times and foam stability appeared to increase 15 times after ozonation of protein. The effects of gas ozonation on solubility of WPI were observed to be more extensive than the effect of ozone treatment in aqueous solutions. Denaturation temperature and denaturation enthalpy of WPI were measured by differential scanning calorimeter (DSC). Denaturation temperature of WPI increased while denaturation enthalpy decreased indicating that WPI were denatured during ozone treatment. HPLC chromatograms of ozone treated protein samples showed a 42% reduction in the peak area of WPI. Ozone treatment affected emulsion activity and emulsion stability negatively due to oxidation and denaturation of protein molecules. http://dx.doi.org/10.1016/j.jbiotec.2016.05.237 Study on the behavior of a high power hydraulic amplifier at constant flow Lavinia Micu 1 , Adrian Firu 2 , Doru Petanec 3,∗ 1
University of Agricultural Sciences and Veterinary Medicine of Banat “King Michael I of Romania” Timisoara, Faculty of Agriculture, Timisoara, Romania 2 University of Agricultural Sciences and Veterinary Medicine of Banat “King Michael I of Romania” Timisoara, Faculty of Management, Timisoara, Romania 3 Faculty of Agriculture, Timisoara, Romania E-mail address: [email protected] (D. Petanec). Equipping agricultural machinery with high power amplifiers is today the most efficient and modern methods to automate them.
These hydraulic amplifiers provide greater functionality than those compared with the conventional hydraulic actuators. The aim of this study was to identify the behavior of a high power amplifier at constant flow rates (Q1 = 10.75 l/min; Q2 = 9 l/min; Q3 = 7.25 l/min; Q4 = 5.49 l/min; Q5 = 3.75 l/min; Q6 = 2 l/min) while maintaining the supply voltage of the electric motor at 24 V DC, and at a speed of 3000 rev/min. To build hysteresis for each output have been tried running between 14 and 34 points. Hydraulic amplifier in the study consists of four pumps (two small, for control and two large, for power). For the performance investigation, the amplifier was included in a hydraulic laboratory having as control elements two distributors (one for control and one for power); four valves (two for safety and two anticavitational); a cylinder of execution; the oil tank. The experimental station belongs to the laboratory of the Polytechnic University of Timisoara (Romania), Faculty of Mechanical Engineering. The results showed a linear characteristic for higher speeds of 0.1 m/s; for lower speeds, the characteristics are nonlinear, and at different speeds cylinder performance characteristics will be almost linear. http://dx.doi.org/10.1016/j.jbiotec.2016.05.238 Researches regarding the breeding stage of the Romanian Spotted Cattle in Brasov area Iuliana Neagu ∗ , Magdalena Gonciarov, Margarita Oana Ghimpeteanu Animal Production and Public Health Department, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania E-mail address: iuliana [email protected] (I. Neagu). The aim of the present research is to emphasize the productive performances level, the genetic determinism and the genetic value of the production and reproduction traits in the Romanian Spotted cattle livestock in Brasov area. The researched material was represented by a sample of 236 cattle, recorded during their first lactation, allotted to four groups depending on their birth year. There were taken into consideration only the females with known origin, included in the official production control, with a length of lactation between 260 and 400 days. The 236 cows come from 44 paternal half sib families. There were used mathematical methods to describe the recorded performance data. The establishing of the heritability coefficient was made upon the half sibs, by variance analyze with three sources of variation model. The repeatability coefficient prediction was made upon the two sources of variation analyze on the interclass relation among each cow performance in repeated lactations. Analyzing the genetic determinism of the estimated trait at the first lactation it may notice that the lowest genetic determinism was represented by the length of lactation, the milk amount per total lactation and the age at first calving, all of these having the heritability coefficient of 0.299 ± 0.223. The highest genetic determinism was established in milk fat amount (0.466 ± 0.258). The total analyses of repeatability coefficients shows that the milk yield performances in the analyzed cows recorded an intermediary repeatability (R between 0.205 and 0.425), that indicate the fact that these performances are influenced by temporary environmental conditions. http://dx.doi.org/10.1016/j.jbiotec.2016.05.239
Abstracts / Journal of Biotechnology 231S (2016) S4–S109
scanning calorimeter (DSC). Denaturation temperature of EW protein increased while denaturation enthalpy decreased indicating that proteins were denatured during ozone treatment. Ozone treatment influenced the foam stability of EW proteins more than foaming ability. An improvement in the foaming properties of EW proteins was observed. The increase in foam volume and foam stability of EW proteins solutions was 1.1 and 1.8, respectively. http://dx.doi.org/10.1016/j.jbiotec.2016.05.236 Effects of ozone treatment on some functional properties of whey protein Senol Ibanoglu ∗ , Esra Ibanoglu, Hicran Uzun Gaziantep University, Food Engineering Dept., Gaziantep, Turkey E-mail address: [email protected] (S. Ibanoglu). Ozone received the GRAS (generally recognized as safe) status for use as disinfectant and sanitizer since 1997. There are many applications of ozone in the food industry such as food surface hygiene, sanitation of food plant equipment, reuse of waste water, cleaning of shellfish and disinfection of poultry carcasses and chill water in the poultry industry, increasing shelf-life of fruit and vegetables. Proteins influence the functional properties in foods such as solubility, emulsion and foam formation. In present study, effects of ozone treatment on some functional properties of whey protein isolate (WPI) were investigated. WPI was chosen since it has been extensively used in food products to improve textural, functional and sensory attributes. Ozone treatment of WPI was performed either in aqueous solutions or as gas ozonation of pure protein powders. Ozone treatment influenced foam formation and stability extensively. Although the foam volume of WPI increased 2.25 times and foam stability appeared to increase 15 times after ozonation of protein. The effects of gas ozonation on solubility of WPI were observed to be more extensive than the effect of ozone treatment in aqueous solutions. Denaturation temperature and denaturation enthalpy of WPI were measured by differential scanning calorimeter (DSC). Denaturation temperature of WPI increased while denaturation enthalpy decreased indicating that WPI were denatured during ozone treatment. HPLC chromatograms of ozone treated protein samples showed a 42% reduction in the peak area of WPI. Ozone treatment affected emulsion activity and emulsion stability negatively due to oxidation and denaturation of protein molecules. http://dx.doi.org/10.1016/j.jbiotec.2016.05.237 Study on the behavior of a high power hydraulic amplifier at constant flow Lavinia Micu 1 , Adrian Firu 2 , Doru Petanec 3,∗ 1
University of Agricultural Sciences and Veterinary Medicine of Banat “King Michael I of Romania” Timisoara, Faculty of Agriculture, Timisoara, Romania 2 University of Agricultural Sciences and Veterinary Medicine of Banat “King Michael I of Romania” Timisoara, Faculty of Management, Timisoara, Romania 3 Faculty of Agriculture, Timisoara, Romania E-mail address: [email protected] (D. Petanec). Equipping agricultural machinery with high power amplifiers is today the most efficient and modern methods to automate them.
These hydraulic amplifiers provide greater functionality than those compared with the conventional hydraulic actuators. The aim of this study was to identify the behavior of a high power amplifier at constant flow rates (Q1 = 10.75 l/min; Q2 = 9 l/min; Q3 = 7.25 l/min; Q4 = 5.49 l/min; Q5 = 3.75 l/min; Q6 = 2 l/min) while maintaining the supply voltage of the electric motor at 24 V DC, and at a speed of 3000 rev/min. To build hysteresis for each output have been tried running between 14 and 34 points. Hydraulic amplifier in the study consists of four pumps (two small, for control and two large, for power). For the performance investigation, the amplifier was included in a hydraulic laboratory having as control elements two distributors (one for control and one for power); four valves (two for safety and two anticavitational); a cylinder of execution; the oil tank. The experimental station belongs to the laboratory of the Polytechnic University of Timisoara (Romania), Faculty of Mechanical Engineering. The results showed a linear characteristic for higher speeds of 0.1 m/s; for lower speeds, the characteristics are nonlinear, and at different speeds cylinder performance characteristics will be almost linear. http://dx.doi.org/10.1016/j.jbiotec.2016.05.238 Researches regarding the breeding stage of the Romanian Spotted Cattle in Brasov area Iuliana Neagu ∗ , Magdalena Gonciarov, Margarita Oana Ghimpeteanu Animal Production and Public Health Department, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania E-mail address: iuliana [email protected] (I. Neagu). The aim of the present research is to emphasize the productive performances level, the genetic determinism and the genetic value of the production and reproduction traits in the Romanian Spotted cattle livestock in Brasov area. The researched material was represented by a sample of 236 cattle, recorded during their first lactation, allotted to four groups depending on their birth year. There were taken into consideration only the females with known origin, included in the official production control, with a length of lactation between 260 and 400 days. The 236 cows come from 44 paternal half sib families. There were used mathematical methods to describe the recorded performance data. The establishing of the heritability coefficient was made upon the half sibs, by variance analyze with three sources of variation model. The repeatability coefficient prediction was made upon the two sources of variation analyze on the interclass relation among each cow performance in repeated lactations. Analyzing the genetic determinism of the estimated trait at the first lactation it may notice that the lowest genetic determinism was represented by the length of lactation, the milk amount per total lactation and the age at first calving, all of these having the heritability coefficient of 0.299 ± 0.223. The highest genetic determinism was established in milk fat amount (0.466 ± 0.258). The total analyses of repeatability coefficients shows that the milk yield performances in the analyzed cows recorded an intermediary repeatability (R between 0.205 and 0.425), that indicate the fact that these performances are influenced by temporary environmental conditions. http://dx.doi.org/10.1016/j.jbiotec.2016.05.239