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The Effect of Dietary Methionine Levels on the Performance Parameters of Arctic Foxes (Vulpes Lagopus)

The objective of this study was to determine the effect of dietary inclusion levels of methionine and cystine on the performance traits and health status of Arctic foxes. The experimental material comprised 60 blue Arctic foxes of the Finnish type. Control group (C) animals were fed diets (CA and CB) with standard concentrations of methionine and cystine. In experimental groups E1 and E2, methionine content was increased by approximately 2 g per 100 g total protein, relative to the recommended intake. Diets for group E1 were supplemented with liquid methionine (E1A and E1B), and diets for group E2 were supplemented with crystalline methionine (E2A and E2B). Diets A were offered during the growing period, and diets B were administered during the furring period. During the growing period, methionine+cystine levels in diets E1 and E2 were 4.19+0.59 g and 4.22+0.53 g per 100 g total protein, respectively. During the furring period, methionine+cystine levels were 4.83+0.68 g in diets E1 and 4.91+0.61 g in diets E2. The body weights of Arctic foxes were determined, their body conformation was evaluated, and the duration of the rearing period was calculated. Blood samples for morphological and biochemical analyses were collected from animals aged 24 weeks, selected randomly from each group. After slaughter, pelt length and fur quality were determined in accordance with the International Trading System. The results of this study indicate that diets for Arctic foxes should be supplemented with methionine. The experimental diets contributed to improving the performance traits of foxes, in particular fur quality, and they had no adverse influence on the health status of animals. It may be concluded that farm-raised Arctic foxes of the Finnish type show an increased demand for methionine.

7. References [1] Akumulatory, Elektronika dla wszystkich nr 10/96, 11/96. [Rechargeable batteries. Electronics for everyone. Vol. 10/96, 11/96] . [2] Nowakowski M.: Metody badań w locie osiągów samolotów z różnymi rodzajami napędów . Wydawnictwo ITWL. Warszawa 2013. ISBN 978-83-61021-92-6. [Methods of in-flight tests for performance parameters of aircrafts with various driving systems. ITWL Publishing House, Warsaw 2013, ISBN 978-83-61021-92-6] .

techniques. Fuel, Vol. 277, 2020. 10. Markiewicz M., Muślewski Ł.: The impact of powering an engine with fuels from renewable energy sources including its software modification on a drive unit performance parameters. Sustainability, Vol. 11, Iss. 23, 2019. 11. Mofijur M., Rasul M., Hyde J., Bhuyia M.: Role of Biofuels on IC Engines Emission Reduction. Energy Procedia, Vol. 75, 2015. 12. Radziemska E., Lewandowski W., Szukalska E., Tynek M., Pustelnik A., Ciunel K.: Rape biofuels, preparation of raw material to provide biocomponents under the conditions of an agricultural


Based on many regulations the biofuels are widely used in combustion engines. The operational parameters, such as performance parameters or emission production, are often monitored. The essence of changes to these operational parameters is related to the effect of biofuels on the course of cylinder pressure inside the combustion chamber. The contribution deals with the effect of biobutanol-sunflower oil-diesel fuel blends on the performance parameters, the behaviour of the cylinder pressure of the compression ignition engine during combustion, and exhaust gas temperature. Biobutanol-sunflower oil-diesel fuel blends in ratios of 10–20–70% and 20–20–60% were used as test fuels, with diesel fuel used as a reference. Turbocharged four-cylinder inline CI engine Zetor 1204 installed in the tractor Zetor Forterra 8642 was used for measurement. Based on the results, it can be stated that with higher amount of butanol in the fuel mixture, the maximum value of cylinder pressure decreases, especially at a high engine load.

Effect of Thermal Stress on Reproductive Performance Parameters of Sows with Defined Genotype at the RYR1 locus

The objective of the present research was to determine the influence of ambient air temperature in the farrowing section of a pig facility on chemical composition, colostrum and milk somatic cell counts (SCC), and rearing efficiency of piglets from Polish Landrace (PL) sows with identified genotype at the RYR1 locus. Subjects were 60 PL sows in the second and third reproductive cycle. Polymorphism at the RYR1 locus was analysed using the PCR-RFLP method. The proportion of RYR1 C/C and RYR1 C/T genotypes in each group was 1:1. Three groups of experimental temperatures were established: I - 22°C, II - 25°C, III - 28°C. The present study demonstrated that sows kept in periodic high ambient temperature (25°C, 28°C) showed a relatively long period of farrowing, more aggressive behaviour and overlying. Variability was also found between the groups with respect to litter size and litter weight, chemical composition and SCC of colostrum and milk. The results indicate that elevated ambient temperature during the perinatal period may adversely affect the utility value of sows.

This paper deals with the performance evaluation of a throatless gasifier TG-SI-10E. Evaluation of the throatless gasifier was done in three streams, which were the thermal, design and economic aspects. It was tested with pine needles, derived from the Himalayan chir pine (Pinus roxburghii). A non-isokinetic sampling technique was used for measuring the tar and dust contents. The carbon dioxide and carbon monoxide emission at the exhaust of engine was in the range of 12.8% and 0.1-0.5% respectively. The maximum temperature of producer gas measured at the outlet of the gasifier was 505 °C. The specific biomass consumption rate of pine needles was calculated to be 1.595 kg/kWh (electrical). Specific gasification rate for the given design was found to be 107 kg/m2h. Economic evaluation was based on direct tax incidence.

. Rolnicze. Piñeiro C., Aparicio M., De Andrés M.A., Rainho N., Rodríguez-Estévez V. (2012). Reproducti on performance parameters in Iberian pig farms. In: Options Méditerranéennes: Série A, De Pedro E.J., Cabezas A.B. (eds). Séminaires Méditerranéens; n. 101; Córdoba, Spain. Zaragoza, Spain: CIHEAM, 14-16.10.2010, pp. 193–195. Pugliese C., Sirtori F. (2012). Quality of meat and meat products produced from southern European pig breeds. Meat Sci., 90: 511–518. Pugliese C., Calagna G., Chiofalo V., Moretti V.M., Margiotta S., Franci O., Gandini G. (2004). Comparison of the


In this paper, we have designed the Continuous sampling plan (CSP-5) plan using GERT analysis and the software package MATLAB 2007b. The formula for finding the performance parameters such as AOQ, E(I) and the parameters i and f are found out by GERT technique and developing program for the construction of table values and plotting graph using MATLAB.


The paper focuses on the elaboration of a demand-side management platform for optimal energy management strategies; the topicality is related to the description and comparison of the developed electricity monitoring and control equipment. The article describes two versions based on Atmega328 and STM32 microcontrollers, a lower and higher level of precision, and other distinct performance parameters. At the end of the article, the results of the testing of the two types of equipment are given and their comparison is made.


AIM: This work was done to study the effect of both types of diabetes mellitus (DM) on myocardial contractility in rats. Also, we investigated the role of treatment of DM with insulin and rosiglitazone (used as treatment for type 1 and type 2 DM respectively) in improvement of myocardial dysfunction in diabetic rats.

METHODS: The study included 50 male Wistar albino rats, divided into 5 groups: control (group I), streptozotocin induced type 1 DM (group II), fructose induced type 2 DM (group III), insulin treated type 1 diabetic rats (group IV) and rosiglitazone treated type 2 diabetic rats (group V). At the end of the study, retro-orbital blood samples were withdrawn and blood glucose, plasma triglyceride (TG), total cholesterol (TC) and thyroid hormones levels were measured. Rats were then anesthetized and their hearts were excised and connected to Langendorff apparatus to perform mechanical cardiac performance tests including heart rate (HR), left ventricular developed pressure (LVDP) and maximum rate of pressure rise (+dp/dt). RESULTS: Data of the study showed that relative to control group, there was significant increase in blood glucose, plasma TG and TC levels while, thyroid hormones and myocardial performance parameters showed significant decrease in both type 1 and type 2 diabetic rats. Treatment of type 1 diabetic rats with insulin and type 2 with rosiglitazone resulted in significant decrease in blood glucose, plasma TG and TC levels associated with significant improvement in thyroid hormones and myocardial performance parameters. The results also showed that insulin treatment of type 1 was more effective in ameliorating all parameters than treatment of type 2 by rosiglitazone.

CONCLUSION: We concluded that the induction of both types of diabetes resulted in decreased myocardial performance parameters. The treatment of type 1 and type 2 diabetes by insulin and oral rosiglitazone respectively improved to a great extent the altered metabolism and mechanical myocardial parameters, with more improving effect of insulin in type 1 than rosiglitazone in type 2 DM.