QUALITATIVE CHARACTERISTICS OF THE COAL DEPOSIT KOTEZI IN THE BUGOJNO BASIN

2020 ◽  
Vol 1 (23) ◽  
Author(s):  
Dževad Forčaković
Keyword(s):  
Quality Parameters ◽  
Coal Deposit ◽  
Total Sulfur Content ◽  
Coal Quality ◽  
Study Results ◽  
Brown Coals ◽  
Heat Value ◽  
Lower Heat ◽  
Qualitative Characteristics ◽  
Total Moisture Content

This paper presents study results of the qualitative characteristics of coal deposit Kotezi. Regional geological researches were conducted from 1983 to 1987, and detailed from 2014 to the end of 2018. Tests were performed on the following coal quality parameters: average thickness of pure coal in coal layers, total moisture content, ash content, total sulfur content and lower heat value. Researches were conducted in the field, laboratory and cabinet. Subsequently, an analysis and interpretation of the obtained research results was carried out. Comparing the research geological results of all represented coal layers, deviations of the considered parameters were determined. Coals of the Bugojno basin belong to the younger coals, soft to medium hard, no luster (matt), brown to black colored, and have brown streak. Their fracture is plate-like and particleboard. They do not have a distinct lignite structure, except in the lower layers. With their general habitus, they resemble younger brown coals, and belong to humic coals which are relatively low in carbonation. In the vertical profile of coal layers, the highest quality components are from the upper part of the layer, while the slightly lower quality components are from the middle and lower parts of the layer.

COMPARATIVE ASSESSMENT OF SEMEN QUALITY PARAMETERS OF DZHALGINSKY MERINO AND RUSSIAN MEAT MERINO RAMS DEPENDING ON THE SEASON

2020 ◽  
pp. 81-90
Author(s):  
Т.V. MAMONTOVA ◽  
◽  
А.-М.М. AYBAZOV
Keyword(s):  
Semen Quality ◽  
Quality Parameters ◽  
Comparative Assessment ◽  
High Variability ◽  
Semen Volume ◽  
Study Results ◽  
Different Seasons ◽  
Individual Evaluation ◽  
Qualitative Characteristics ◽  
Artificial Vagina

Many breeds of sheep show pronounced seasonality in reproduction. The aim of the study was to study quantitative and qualitative characteristics of semen taken from Dzhalginsky Merino (DzM) and Russian Meat Merino (RMM) rams in different seasons of the year. Semen samples were taken from five rams of each breed weekly for 12 months using an artificial vagina. The study results showed significant (P<0.05) seasonal variations in semen concentration and survival. It was found that the highest semen quality was obtained in autumn, the lowest possible in spring (semen volume: 1.41 ml in DzM and 1.25 ml in RMM vs. 0.96 ml in DzM and 0.79 ml in RMM; concentration: 3.61 billion/ml in JM and 3.35 billion/ml in RMM vs. 2.66 billion/ml in DzM and 2.33 billion/ml in RMM; motility 9.08 points in DzM and 8.57 points in RMM vs. 7.42 points in DzM and 6.45 points in RMM). The estimation of semen motility after cryopreservation showed a 50% decrease on average as compared to fresh semen.Despite the high variability of most semen indices of both breeds, the conclusion was made that it is possible to use rams of Dzhalginsky Merino and Russian Meat Merino in autumn-winter and summer months. However, the revealed differences between the studied indicators within each breed indicate the need to select the producing rams based on their individual evaluation.

scholarly journals Dual-stage sugar substitution in Tommy Atkins mango

2019 ◽  
Vol 23 (1) ◽  
pp. 60-64
Author(s):  
Rafael A. B. de Medeiros ◽  
Zilmar M. P. Barros ◽  
Carlos B. O. de Carvalho ◽  
Antonio C. D. Coêlho ◽  
Maria I. S. Maciel ◽  
...  
Keyword(s):  
Quality Parameters ◽  
Ultrasonic Waves ◽  
Total Phenolic ◽  
Second Stage ◽  
Study Results ◽  
Fruit Samples ◽  
Dual Stage ◽  
Sugar Replacement ◽  
Two Stages ◽  
High Calorie

ABSTRACT The dual-stage sugar substitution technique (D3S) was used to induce sugar replacement in mango. It involved two stages, in which high-calorie sugars were partially removed from the fruit samples in the first stage and, in the second one, low-calorie sugar was incorporated into the mango. Ultrasonic waves can be applied in one or both stages and their use was also evaluated in this study. Results showed that submitting samples to ultrasonic waves (25 kHz) in both stages and their immersion in Stevia-based solution (250 or 500 g kg-1) in the second stage for 10, 20 and 30 min of processing gave higher water loss during the process, while greater solids gain could be achieved by applying ultrasound only in the first stage. Samples were also evaluated in terms of some quality parameters. The use of this technique resulted in samples with higher values of total phenolic content and changes in color parameters (L*, a* and b*). When samples were subjected to ultrasonic waves in both stages, a higher carotenoid retention was observed.

scholarly journals The Effect of Enriching Honey with Propolis on the Antioxidant Activity, Sensory Characteristics, and Quality Parameters

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1176 ◽  
Author(s):  
Celina Habryka ◽  
Robert Socha ◽  
Lesław Juszczak
Keyword(s):  
Specific Conductivity ◽  
Sugar Content ◽  
Quality Parameters ◽  
Biologically Active ◽  
Sensory Characteristics ◽  
Antioxidant Compounds ◽  
Propolis Extract ◽  
Excellent Source ◽  
Qualitative Characteristics ◽  
Natural Way

Bee products, including propolis, are a valuable source of biologically active substances. The most natural way to introduce propolis in the diet seems to be its addition to honey. The aim of this study was to analyze the effect of honey enrichment with propolis on the content of selected bioactive compounds, antioxidant potential, as well as sensory and qualitative characteristics of honey. On the basis of the obtained results, it was stated that the addition of propolis extract to honey contributed to a significant increase in the content of polyphenolic compounds, including flavonoids and phenolic acids, among which chrysin, pinocembrin, p-coumaric, and ferulic acid reached the highest level. The increase of antioxidant, antiradical, and reduction in activity of enriched honey was observed as a result of increasing addition of propolis extract. However, the enrichment of honey with propolis contributed to deterioration of the sensory properties. The changes in color, smell, texture, and taste were observed. The addition of propolis to honey had no significant effect on 5-hydroxymethylfurfural (HMF) and sugar content, and specific conductivity. On the other hand, a significant increase in free acidity and content of substances insoluble in water was observed. The obtained results indicate that honey supplemented with propolis extract can be an excellent source of antioxidant compounds, nevertheless, the amount of additive used is strongly dependent on changes in sensory characteristics and consumer acceptability.

scholarly journals Key Tasks of Science in Improving Effectiveness of Hard Coal Production in Poland

2017 ◽  
Vol 62 (3) ◽  
pp. 597-610 ◽  
Author(s):  
Józef Dubiński ◽  
Stanisław Prusek ◽  
Marian Turek
Keyword(s):  
Market Competition ◽  
Quality Parameters ◽  
Enterprise Management ◽  
Hard Coal ◽  
Mining Activities ◽  
Coal Quality ◽  
Mining Enterprise ◽  
Innovative Solutions ◽  
The Subject ◽  
Operation Cost

Abstract The article presents an array of specific issues regarding the employed technology and operational efficiency of mining activities, which could and should become the subject of conducted scientific research. Given the circumstances of strong market competition and increasing requirements concerning environmental conditions, both in terms of conducted mining activities and produced coal quality parameters, it is imperative to develop and implement innovative solutions regarding the employed production technology, the safety of work conducted under the conditions of increasing natural hazards, as well as the mining enterprise management systems that enable its effective functioning. The article content pertains to the last group of issues in the most detailed way, particularly in terms of the possibility for rational conducted operation cost reduction.

Technical Analysis on Lignite Drying Technology with High Temperature Flue Gas

2013 ◽  
Vol 448-453 ◽  
pp. 1335-1342 ◽  
Author(s):  
Zhi Qiang Wen ◽  
Xian Ran Zhu
Keyword(s):  
High Temperature ◽  
Flue Gas ◽  
Material Balance ◽  
Inert Atmosphere ◽  
Inlet Temperature ◽  
Rotating Speed ◽  
Fine Grained ◽  
Heat Value ◽  
Lower Heat ◽  
Drying Technology

The procedure and system of drum drying technology are introduced for lignite drying and upgrading with high temperature flue gas. The total moisture and inherent moisture of lignite decrease significantly after being dried and the lower heat value (LHV) increases greatly, which means that the quality of lignite is improved obviously. Both the moisture and air dried volatile of the dried product coal decrease gradually when increasing the drum inlet temperature. However, only the moisture decreases and the volatile varies little when increasing the drum outlet temperature.The rotating speed of drum will make a few impact on the drying degree. Because the combustion load and the drying output will affect each other, it is recommended that the independent pulverized coal system is added. The key factors affecting the system material balance are the ratio of fine-grained powder and lower heat value. The appropriate ratio of fine-grained powder is suggested. The inert atmosphere feeding system which can control the oxygen content independently must be designed.

AVAILABLE ELGIN COAL DEPOSIT COAL QUALITY INDICATORS ASSESSMENT

Ugol ◽  
2016 ◽  
pp. 72-77
Author(s):  
N.N. Grib ◽  
◽  
P.Yu. Kuznetsov ◽  
Keyword(s):  
Quality Indicators ◽  
Coal Deposit ◽  
Coal Quality

scholarly journals A study on the effects of foliar feeding under different soil fertilization conditions on the yield structure and quality of common oat (Avena sativa L.)

2014 ◽  
Vol 67 (1) ◽  
pp. 109-120 ◽  
Author(s):  
Stanisław Chwil
Keyword(s):  
Nutrient Content ◽  
Quality Parameters ◽  
Urea Solution ◽  
Test Plant ◽  
Soil Fertilization ◽  
Primary Yield ◽  
Magnesium Compounds ◽  
Yield Structure ◽  
Qualitative Characteristics

<p>The present study was conducted based on a field experiment established on very acidic medium soil (silt loam). The experimental design included 4 soil fertilization treatments: O, NPK, NPK + MgSO<sub>4</sub>. 7H<sub>2</sub>O, NPK + CaO + MgO, and 3 foliar feeding treatments: O<sub>(H2O)</sub>, Insol PK + 5% urea solution, Ekosol U. The test plant was the oat cultivar ‘Kwant’. The aim of this study was to characterize in detail the response of oats to foliar feeding under the conditions of different soil fertilization with calcium and magnesium compounds. The experimental factors applied increased the yield parameters and differentiated the nutrient content in oat grain and straw. Soil fertilization had a greater effect on the quality parameters of primary yield than the foliar fertilizers used in the study. The best production and quality effects in growing oats were obtained after the application of MgSO<sub>4</sub> and magnesium lime. Foliar feeding also affected beneficially the quantitative and qualitative characteristics of the yield. Among the fertilizers used, Insol PK showed a better effect than Ekosol U, in particular on the yield structure and the amino acid composition of proteins.</p>

scholarly journals Assessment of sources and distribution metals in groundwater of Pondicherry region, India

2020 ◽  
Vol 2 (2) ◽  
pp. 33-53
Author(s):  
Thilagavathi R ◽  
Chidambaram S ◽  
Thivya C ◽  
Banajarani Panda ◽  
Ganesh N
Keyword(s):  
Heavy Metals ◽  
Statistical Analysis ◽  
Anthropogenic Activities ◽  
Monsoon Season ◽  
Heavy Metal Concentration ◽  
Quality Parameters ◽  
Multivariate Statistical ◽  
North East ◽  
Study Results ◽  
South West Monsoon

The proposed study investigates the seasonal variation in the concentration and the source of the heavy metals like Mn, Cu, Pb, Zn and Fe in the groundwater samples of Pondicherry region. The study results reveal that, the heavy metal concentration is high during South West Monsoon season (SWM) compared to that of North East Monsoon season (NEM). The pH was near neutral and metal load representing most of the samples were low during NEM. Statistical analysis shows that the 63.7 % of the total variance is observed during NEM and 68.9% during SWM. Geographic information system (GIS) tool was considered for the study to understand the environmental pollution status of the groundwater systems of the study area and to identify the groundwater quality parameters. The multivariate statistical analysis explains that the source of trace metal in the groundwater is derived from natural origin except copper and lead as these contaminants were derived from anthropogenic activities. Based on the output of WATEQ4F, several species of heavy metals exist, in which the dominant species are Mn, CuCl2, PbCO3, Fe and Zn.

scholarly journals Meat quality parameters of broilers from different rearing systems

2005 ◽  
Vol 21 (3-4) ◽  
pp. 133-140
Author(s):  
Snezana Bogosavljevic-Boskovic ◽  
Sreten Mitrovic ◽  
Vera Radovic ◽  
Milun Petrovic
Keyword(s):  
Meat Quality ◽  
Quality Parameters ◽  
Quality Characteristics ◽  
Point Of View ◽  
Poultry Meat ◽  
Experimental Investigations ◽  
Meat Production ◽  
Muscular Tissue ◽  
Free Range ◽  
Study Results

Bearing in mind certain established European Union regulations on non-industrial poultry meat production, experimental investigations were conducted with the aim to examine the effect of two different rearing systems (free-range rearing and extensive rearing in the chicken pen) on some meat quality characteristics. Investigation results on the shares of muscular tissue, bones and skin in major carcass parts (breasts, thighs and drumsticks) were used as poultry meat quality parameters. Based upon the obtained study results, it could be concluded that a somewhat higher meat share in breasts and drumsticks was recorded with the free-range-reared broilers as compared to the extensively reared ones. A somewhat higher meat share in the drumsticks was registered with the hens whereas other differences from the point of view of the sex effect were small.

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