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1.
VPLIV DODATKA »SELACID® GREEN GROWTH« NA PITOVNE LASTNOSTI BROJLERSKIH PIŠČANCEV
Eva Gačnik Hrastnik, 2009, diplomsko delo

Opis: V diplomski nalogi smo predstavili vpliv in delovanje krmnega dodatka »Selacid® Green Growth« na proizvodne lastnosti brojlerskih piščancev. Poskus se trajal 42 dni na Testni postaji za perutnino, Fakultete za kmetijstvo in biosistemske vede, Univerze v Mariboru. Piščanci petelinčki provenience ROSS 308, so bili krmljeni s krmnimi mešanicami iz redne proizvodnje , ki smo jih razdelili v 4 testne skupine po 300 živali. Testna skupina A je predstavljala kontrolno skupino, ki je prejemala krmo brez dodatka, piščanci testnih skupin B, C in D pa so v krmi prejemali dodatek »Selacid® Green Growth« v različnih odmerkih na tono krme. »Selacid® Green Growth« je koncentriran prehranski dodatek, s posebno kombinacijo kratkoverižnih organskih kislin in srednjeverižnih maščobnih kislin ter njihovih soli, s širokim spektrom delovanja na Gram- kot na tudi z Gram+ bakterije v prebavnem traktu perutnine. Osnovni namen in cilj raziskave je bil ugotoviti, ali krmni dodatek pozitivno vpliva na rentabilnost proizvodnje piščančjega mesa. Rezultati so pokazali, da so piščanci iz kontrolne skupine A pri tehtanjih dosegli nižjo telesno maso. Piščanci iz testnih skupin B, C in D so dosegli tudi nižjo konverzijo krme, prav tako pa so statistično značilno (P≤0,05) odstopali pri doseženem proizvodnem številu, ki je bilo višje kot pri kontrolni skupini A.S tem smo potrdili pozitiven učinek testiranega dodatka.
Ključne besede: brojlerski piščanec / prehrana / organske kisline / alternativni krmi dodatki / »Selacid® Green Growth«
Objavljeno: 30.11.2009; Ogledov: 1950; Prenosov: 163
.pdf Polno besedilo (472,22 KB)

2.
Preparation of enantiomers using high pressure technologies
Paul Thorey, 2010, doktorska disertacija

Opis: The study of two different methods of obtaining chiral alcohols is proposed herein. The requirement of the relatively new paradigm of green chemistry associated with clean technologies such as biocatalysis or non-conventional solvents, dense gases, was focused at. Indeed, the two methods of production of chiral alcohols were: - the conversion of acetophenone into (R)-1-phenylethanol in dense gases catalysed by Lactobacillus brevis alcohol dehydrogenase and its coenzyme, NADP/H; - the resolution of (±)-trans-1,2-cyclohexanediol by cocrystal formation with tartaric acid followed by supercritical extraction. In both cases high enantiopurities were achieved (ee>99%).
Ključne besede: High-pressure technologies, enantiomers, green chemistry, R-1-phenylethanol, Lactobacillus brevis, alcohol dehydrogenase, NADP, liquid propane, enzyme deactivation, resolution, trans-1, 2-cyclohexanediol, tartaric acid, cocrystal, supercritical carbon dioxide, extraction, X-ray diffraction, differential scanning calorimetry
Objavljeno: 02.02.2011; Ogledov: 1757; Prenosov: 53
.pdf Polno besedilo (6,25 MB)

3.
Evaluation of Green`s function for vertical point-load excitation applied to the surface of a semi-infinite elastic medium
Andrej Štrukelj, Tomaž Pliberšek, Andrej Umek, 2006, izvirni znanstveni članek

Opis: The topic of this paper is to show that the integrals of infinite extent representing the surface displacements of a layered half-space loaded by a harmonic, vertical point load can be reduced to integrals with finite integration range. The displacements are first expressed through wave potentials and the Hankel integral transform in the radial coordinate is applied to the governing equations and boundary conditions, leading to the solutions in the transformed domain. After the application of the inverse Hankel transform it is shown that the inversion integrands are symmetric/antimetric in the transformation parameter and that this characteristic is preserved for any number of layers. Based on this fact the infinite inversion integrals are reduced to integrals with finite range by choosing the suitable representation of the Bessel function and use of the fundamental rules of contour integration, permitting simpler analytical or numerical evaluation. A numerical example is presented and the results are compared to those obtained by the CLASSI program.
Ključne besede: civil engineering, soil mechanics, Green`s function, layered half-space, vertical point load
Objavljeno: 31.05.2012; Ogledov: 1146; Prenosov: 4
URL Polno besedilo (0,00 KB)

4.
Protection of copper and its alloys using corrosion inhibitor-literature review
Milorad V. Tomić, Miomir Pavlović, Milovan Jotanović, Regina Fuchs-Godec, 2010, izvirni znanstveni članek

Opis: A review of the literature dealing with the electrochemical corrosion of copper and its alloys with purpose to find the most suitable inhibitor for its protection has been done. According to their chemical composition of corrosion inhibitors are divided into inorganic and organic inhibitors. Inhibition of alloying metals are possible (such as the addition of arsenic alloy components in brass, preventing its unzincanization). The paper reviews the theoretical basis of application of inhibitors to protect metals from corrosion as well as an overview of current research application of inhibitorsto protect copper and copper alloys. Benzotriazole (BTA) is most often used corrosion inhibitor for copper and its alloys in acidic and alkaline solution, because of its high inhibition efficiency. The lowest concentration of inhibitor for protection of copper in various solutions was 0.05%, and for the protection of copper in contact with steel is 0.1%. On the surface of copper and brass BTA forms a protective Cu-BTA film. However, BTA is like many other synthesized organic inhibitors is very toxic and if used invery small concentrations. It turnedout that the AETD, AETDA and PTAT good corrosion inhibitors of copper mixed type with the efficiency of inhibition increases with concentration. Due to the adverse effects on the environment, health and other bodies in recent times the focus of researchis transferred to the inhibiting action of biological molecules or mixtures of natural compounds called "Green inhibitors".
Ključne besede: corrosion inhibitors, protection of metals, inorganic inhibitors, organic inhibitors, alloys elements, green inhibitors
Objavljeno: 31.05.2012; Ogledov: 966; Prenosov: 13
URL Polno besedilo (0,00 KB)

5.
Approximate expressions for the Green's functions of a semi-infinite, elastic medium
Tomaž Pliberšek, Andrej Umek, 2010, izvirni znanstveni članek

Opis: On the basis of an exact, discretized presentation of the Green's function components, their closed-form approximations are developed. Their accuracy is considered to be better than the tolerances in the intrusive measurements data for the identification of the mechanical characteristics of soils. The use of these approximate expressions is believed to considerably reduce the computational effort in soil-structure interaction problems and open up new possibilities for the non-intrusive identification of soils
Ključne besede: elastodynamics, half-space, Green's function, approximate solutions
Objavljeno: 31.05.2012; Ogledov: 1013; Prenosov: 4
URL Polno besedilo (0,00 KB)

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7.
Green logistics - a solar warehouse concept
Matjaž Knez, Péter Bajor, Sebastijan Seme, 2011, izvirni znanstveni članek

Opis: Transportation and logistics are responsible for climate change as they produce greenhouse gases and contribute to the increasing share of fossil fuels, such as oil, in global energy consumption. Supplying the required energy for the transport and logistics sector in an environment-friendly way (based on electric or hydrogen fuels) is one of the main challenges for mankind. Material handling processes have a significant energy demand in warehouse operations, and the application of electricity-driven vehicles and equipment is widely accepted. With the effective use of available green electricity sources - like photovoltaic and wind energy - in the warehouse, we could provide energy for these operations. This article, based on laboratory data, describes a solar-warehouse concept and analyzes the critical parameters, such as energy demand of processes and vehicles, the characteristics of consumption and production, the alternative solutions of electricity storage and fast-charging.
Ključne besede: green logistics, greenhouse gasses, electricity, solar energy
Objavljeno: 05.06.2012; Ogledov: 821; Prenosov: 18
URL Polno besedilo (0,00 KB)

8.
Rain energy as a green energy source?
Andrej Predin, Jurij Avsec, Gorazd Hren, 2010, izvirni znanstveni članek

Ključne besede: green energy sources, monsoon rain, energy of the rain
Objavljeno: 05.06.2012; Ogledov: 673; Prenosov: 0
URL Polno besedilo (0,00 KB)

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10.
DISKURZ O BOLEZNI NA PRIMERU ROMANA JOHNA GREENA KRIVE SO ZVEZDE
Maja Kajbič, 2015, magistrsko delo

Opis: Magistrska naloga obravnava jezikovne značilnosti diskurza o bolezni v romanu Krive so zvezde (The Fault in Our Stars) avtorja Johna Greena (2012). Delo je uvrščeno v literarni žanr mladinskega leposlovja, za katerega je značilen določen slog pisanja in temu primerne teme. Magistrsko delo vsebuje kratko analizo žanra in njegovih tipičnih značilnosti ter pojasni kako se roman Krive so zvezde razlikuje od prejšnjih del tega žanra. Analiz v magistrska nalogi se osredotoča na diskurz, kjer beseda nanese na bolezen (smrt, umiranje) in analizira izrazna in kohezivna sredstva v teh odsekih. Analiza je pokazala, da v diskurzu o bolezni, v nasprotju s pričakovanji, ne prevladujeta elipsa in substitucija, temveč različne oblike leksikalne kohezije.
Ključne besede: diskurz, John Green, kohezivna sredstva, Krive so zvezde, mladinsko leposlovje
Objavljeno: 12.11.2015; Ogledov: 547; Prenosov: 67
.pdf Polno besedilo (543,07 KB)

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