Search Results

You are looking at 71 - 80 of 472 items for :

Clear All
Open access

I. Holló, J. Csapó and G. Holló

Abstract

The impact of supplementation of vitamin E or organic selenium in DDGS (dried distillers grains with solubles) diet on fatty acid composition in two meat cuts of finishing Holstein bulls was investigated. Twenty-four Holstein bulls were allotted to treatments in three groups of eight bulls per group for a 100-day trial. The treatments were adequate Se and vitamin E supplementation in control group (C), supranutritional vitamin E supplementation in vitamin Group E (E), supranutritional Se supplementation in selenium group (Se). At similar age, slaughtering Group C had higher slaughter/carcass weight and EUROP fat score than Se counterparts. The killing out percentage and proximate composition of muscles differed among treatments. Inclusion of the vitamin E or Se supplement led to expected increases (P < 0.05) in vitamin E and Se contents of the brisket and loin. Higher vitamin E concentration caused significant lower SFA and greater PUFA. Higher Se level influenced significant SFA in brisket and PUFA in both muscles. Vitamin E or Se dietary treatments in DDGS-supplemented diet resulted in beef meat cuts considerably beneficial PUFA/SFA but markedly higher n-6/n-3 PUFA ratio and even higher health index in both meat samples opposite to Group C.

Open access

Mihaela Lungu, Sorin Liviu Ștefănescu and Monica Dumitrașcu

Abstract

Soil fertility properties, irrigation water quality, mineral nutrition, and some vegetables mineral composition were studied in the frame of a project regarding yield quality monitoring in certified organic vegetable farms, in two farms placed on the outskirts of Bucharest Municipality which provide products for the town’s organic market. Chemical analysis of the soil samples collected from the two farms reflects a good fertility, close to the natural one of this region soils, with well-balanced organic matter, total nitrogen, accessible phosphorus and potassium contents. The nitrates contents concord with the plants nutrition demands and don’t present the risk to accumulate in vegetables or to leach into the groundwater. Slightly increased microelements, both total and soluble forms, occur. Soil microbiological properties are favorable for vegetable plants growth. A good biodiversity is noticed. There are differences between soil properties in open field and greenhouses, induced both by the type and degree of mechanical works and materials applied for fertilization and plant protection. Good conditions are generally created for plants mineral nutrition. Mineral nutrition status of the vegetables grown in organic conditions, assessed by the leaves mineral composition, doesn’t differ from the one of the vegetables grown in conventional conditions. The vegetables (fresh material) harvested from the two studied farms have good, even high, concentrations of mineral elements important for the yield nutritional quality. The excessive microelements quantities noticed in soil don’t transfer in the yield, so the latter quality and nutritional properties are not altered.

Open access

Z. Konopka and A. Pasieka

References [1] Konopka, Z. (2011). Metal cast composites . Częstochowa: Ed. Częstochowa University of Technology. [2] Ashby, M.F., Jones, D.R.H. (1998). Engineering Materials. Properties and Applications . Warsaw: WNT. [3] Konopka, Z. (2008). Gravity and pressure die casting of Al alloy matrix composites with SiC and graphite particles . Częstochowa: Ed. Częstochowa University of Technology. [4] Clyne, T.W., Withers, P.J. (1993). An Introduction to Metal Matrix Composites . Cambridge UK: Cambridge University Press. [5] Sato, A. & Mehrabian, R

Open access

Jacek Rąbkowski and Rafał Kopacz

. (2016b). The Benefits of SiC mMosfets in a T-Type Inverter for Grid-Tie Applications. IEEE Transactions on Power Electronics, 32(4), pp. 2808-2821. Furusho, Y. and Fuji, K. (2016). 1-MW solar power conditioning system with boost converter using all-SiC power module. In: Proceedings of 9th International Conference on Integrated Power Electronics Systems CIPS 2016, Nuremberg, Germany: VDE, pp. 1-5. Grbovic, P., Delaure, P., Le Moigne, P. and Bartholomeus, P. (2012). A Three-Terminal Ultracapacitor-Based Energy Storage and PFC Device for

Open access

M. Zdanowski and R. Barlik

initiated”, IEEE Ind. Electron. Mag. 6 (2), 17-26 (2012). [6] X. Gu, Q. Shui, C.W. Myles, and M.A. Gundersen, “Comparison of Si, GaAs, SiC and GaN FET-type switches for pulsed power applications”, Proc. of 14th IEEE International Pulsed Power Conference, Dallas, 362-365 (2003). [7] Y. Su, Q. Li, M. Mu, and F.C. Lee, “High frequency inductor design and comparison for high efficiency high density pols with gan device”, Proc. of Energy Conversion Congress and Exposition (ECCE), 2146-2152 (2011). [8] M. Biglarbegian, N. Shah, I

Open access

Z. Konopka, A. Zyska, M. Łągiewka and M. Nadolski

References [1] Konopka, Z., Pasieka, A., Łągiewka, M., Nadolski, M. & Zyska, A. (2014). Correlations between arrangement of reinforcing particles and mechanical properties in pressure die cast AlSi11-SiC composites. Archives of Foundry Engineering, PAN Oddział Katowice, 14(2). 31-36. [2] Konopka, Z. & Pasieka, A. (2014). The influence of pressure die casting parameters on the mechanical properties of AlSi11/10% SiC composite, Archives of Foundry Engineering, PAN Oddział Katowice, 14(1). 59-62. [3] Konopka, Z

Open access

P. Egizabal, A. Romero and A. Torregaray

References M. K. Surappa, Aluminium matrix composites: Challenges and opportunities, Sadhana-Acad. P. Eng. 28 , 319 (2003). B. Mondal, S. Kundu, A. K. Lohar, B. C. Pai, Net-shape manufacturing of intricate components of A356/SiC p composite through rapid-prototyping-integrated investment casting, Mater. Sci. Eng. 498 , 37 (2008). B. Ralph, H. C. Yuen, W. B. Lee, The processing of metal matrix composites - an overview, J. Mater. Process Technol. 63 , 339 (1997

Open access

B. Kalandyk, G. Tęcza, R. Zapała and S. Sobula

. Archives of Foundry Engineering. 2 (4), 376-383. (in Polish). [11] Kalandyk B. & Zapała R. (2009). The abrasive wear behavior of alloy cast steel in SiC -water slurry. Archives of Foundry Engineering. 9 (4), 91-94.

Open access

S. Sobula, E. Olejnik and T. Tokarski

. Archives of Metallurgy and Materials. 58(3), 803-808. [13] Kalandyk, B. & Zapała, R. (2009). The abrasive wear behaviour of alloy cast steel in SiC-water slurry. Archive of Foundry Engineering. 9(4), 91-94.

Open access

Lorenzo Torrisi, Lucia Calcagno, Mariapompea Cutroneo, Jan Badziak, Marcin Rosinski, Agnieszka Zaras-Szydlowska and Alfio Torrisi

applications. J. Phys. D-Appl. Phys., 44, 283001. 7. Torrisi, L., Cutroneo, M., & Ceccio, G. (2015). Effects of metallic nanoparticles in thin foils for laser ion acceleration. Phys. Scr., 90(1), 015603. 8. Oldenburg, S. J., Averitt, R. D., Westcott, S. L., & Halas, N. J. (1998). Nanoengineering of optical resonances. Chem. Phys. Lett., 288, 243-247. 9. Cutroneo, M., Musumeci, P., Zimbone, M., Torrisi, L., La Via, F., Margarone, D., Velyhan, A., Ullschmied, J., & Calcagno, L. (2013). High performance SiC detectors for MeV ion