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Abstract

This paper presents the possibility of receiving the granular forms of a zeolitic material of the Na-P1 type obtained from high-calcium fly ash in a semi-technical scale by means of three compacting techniques. The compaction process was carried out using cement, molasses and water glass as binders. Each of the proposed compacting methods affected the textural parameters of the obtained granular zeolite forms, as well as the binders used. In comparison to the other binders it was found that the cement binder had the smaller impact on the values of the textural parameters of the obtained compacted zeolite forms. The surface area for the zeolite Na-P1 was 98.49 m2·g-1, for the cement as a binder was 69.23 m2·g-1, for the molasses was 52.70 m2·g-1and for the water glass was 40.87 m2·g-1. For this reason, the briquetting and extruding tests were carried out using cement as a binder.

. D. Reidel, Dordrecht, 275-288. Flemming, B.W., 2007. The influence of grain-size analysis methods and sediment mixing on curve shapes and textural parameters: implications for sediment trend analysis. Sedimentary Geology 202, 425-435. Florek, W., Mycielska-Dowgiałło, E. & Starkel, L., 1990. Lithology and facies of fluvial deposits. [In:] L. Starkel (Ed): Evolution of the Vistula River valley during the last 15 000 years , Part III. Geographical Studies Special Issue 5 (Ossolineum, Wrocław), 111-126. Folk, R.L., 1971. Longitudinal dunes of the northwestern edge

References [1] Altunbas M. C. et al., A post-reconstruction method to correct cupping artifacts in cone beam breast computed tomography, Med Phys, 34, 7, 2007, 3109-3118.21 [2] Amadasun M., King R., Textural features corresponding to textural properties, IEEE Trans Syst Man Cybernetics , 19, 1989, 1264-1274.4 [3] Bahl G. et al., Noninvasive classification of hepatic fibrosis based on texture parameters from double contrast-enhanced magnetic resonance image, J Magn Res Imaging , 36, 2012, 1154-1161.10 [4] Belaroussi B., Milles J., Carme S., Zhu J-M., Benoit

Abstract

A cylinder liner and piston ring running under starved lubrication near the top dead centre (TDC) and bottom dead centre (BDC) cause abnormal friction and wear during operation of a marine diesel engine. The method of laser texturing is proposed to improve the surface friction property under this condition. Spherical crown pits with different parameters were formed on the surface of samples by femtosecond laser processing. The BDC and TDC conditions of oil starvation were simulated in a reciprocating friction and wear experiment, and a numerical model of surface texture lubrication based on the Reynolds equation was established. The influence of the distribution density, diameter, and depth parameters of the texture on the surface properties was studied. In the BDC condition, compared with the untextured surface, the average coefficient of friction (COF) can be reduced by up to 24% and the average friction force can be reduced by up to 18%. In the TDC condition, the COF can be reduced by up to 19%, and the average friction force can be reduced by up to 18%. Therefore, the textures with various parameters should be arranged in different positions on the cylinder liner; more attention should be paid to the optimisation of diameter in the texture of the cylinder liner near the BDC, whereas more attention should be paid to the optimisation of distribution density in the texture of the cylinder liner near the TDC

). Investigation of the surface integrity and fatigue strength of Inconel718 after wire EDM and machine hammer. International Journal of Material Forming, 9 (5), 635-651. [27] Qi, Q., Li, T., Scott, P.J., Jiang, X. (2015). A correlational study of areal surface texture parameters on some typical machined surfaces. Procedia CIRP, 27, 149-154. [28] Rosen, B.G., Anderberg, C., Ohlsson, R. (2008). Parameter correlation study of cylinder liner roughness for production and quality control. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering

been shown by Bhattacharya et al. (2002) previously. Table 2 Staling kinetic parameters according to the Avrami equation Tabelle 2. Kinetische Parameter des Altbackenwerdens laut Avrami-Gleichung Bread type Avrami equation parameters n k R 2 Fresh bread Flour A 1.85 0.184 0.934 Flour B 3.42 0.030 0.998 Flour C 5.66 0.002 0.999 Frozen dough bread Flour A 0.95 0.314 0.999 Flour B 4.92 0.005 0.999 Flour C 3.14 0.048 0.999 4 Conclusions The main goal of the current study was to set up a micro-baking procedure, which allows the measurement of bread crumb texture

. Supl., 44: 157–168. Migdał W., Orzechowska B., Różycki M., Tyra M., Wojtysiak D., Duda I. (2006). Chemical composition and texture parameters of loin from Polish Landrace, Polish Large White and Pietrain fatteners. Ann. Anim. Sci. Suppl., 2: 375–378. Oksbjerg N., Petersen J.S., Sorensen I.L., Hencek P., Vestergaard M., Ert-bjerg P., Moller A.J., Bejerholm C., Stoier S. (2000). Long-term changes in performance and meat quality of Danish Landrace pigs: a study on a current compared with an unim-proved genotype. Anim. Sci., 71: 81–92. Orzechowska B., Wojtysiak D

Preparation and properties of porous carbon material containing magnesium oxide

Porous carbons loaded with magnesium oxide were prepared through one-step process. Poly(ethylene terephthalate) and natural magnesite were used as carbon source and MgO precursor, respectively. An impact of a temperature and relative amounts of raw components used for preparations on the textural parameters of resulting hybrid materials is presented and discussed. As found, pore structure parameters tend to decrease along with MgO loading and temperature used during preparation process. Micropore area is the parameter being reduced primarily.

Abstract

The aim of this study was to analyse the correlation between basic meat composition (water, protein, fat, and connective tissue contents), pH value, and physical parameters (texture and colour, drip loss) of selected beef muscles. Five different muscles (LTH, SEM, SET, PSM, TRI) from 20 carcasses were examined. Measurements of the basic meat composition were conducted using a near infrared spectrometry method, colour parameters in L*a*b system, and texture parameters. Drip loss correlated strongly negatively with the pH value. Depending on the muscle type, the correlation ranged -0.601≤r≤-0.282, whereas drip loss correlated moderately positively with connective tissue content. The most significant positive correlation (r≈0.67) between hardness, tenderness, and fat content was noted in the SEM. Colour parameters strongly depended on pH values (-0.831≤rL*≤-0.338; - 0.828≤ra*≤-0.542; -0.912≤rb*≤-0.719) and to a lesser extent on the content of connective tissue.

Abstract

The authors have been studying various characteristics of muscle fibres and their relationship to the meat quality parameters for many years. However, the conclusions drawn by researchers often differ. A higher proportion of glycolytic IIB fibres in pig muscles is usually related to paler meat with lower water holding capacity. On the other hand the relationship between muscle fibres and meat texture parameters is not clear. Studies using immunohistochemistry methods that allow a more detailed classification of individual muscle fibre types could bring new findings in this area. It would thus be possible to influence muscle fibre type composition in the muscle to achieve the desired meat quality using various extrinsic and intrinsic factors. The main aim of this review is to summarise current knowledge on the description of muscle fibres typology and the effect of their morphological traits on pork meat quality.