This paper deals with the design, construction and performance evaluation procedure of a solar tunnel dryer in drying fish. A 12 meter long and 2 meter width half-circled tunnel was designed and constructed to dry abo...This paper deals with the design, construction and performance evaluation procedure of a solar tunnel dryer in drying fish. A 12 meter long and 2 meter width half-circled tunnel was designed and constructed to dry about 50-100 kg of freshly harvested fishes per batch. The half of the tunnel base was used as the flat plate air heating solar collector and the remaining half as a dryer. The drying air was forced from the collector region （north side） to the drying region （south side） of the half circled tunnel where the product is to be dried. The drying temperature could be easily raised by some 5-30 ℃ above the ambient temperature inside the tunnel at an air velocity of approximately 0.2 m/sec. The test was conducted with 51.5 kg freshly harvested sardines （hall-load） with initial moisture content of 66.5% （wet-basis） to analyze the performance of the dryer. The fishes were dried to a final average moisture content of 15.5% （wet-basis） within three days （30 hours）. It was possible to reach the moisture content level for safe storage within less than three days （30 hrs） with solar tunnel dryer and 7 days in open air natural sun drying. The improvement in the quality of fishes in terms of color, brightness, flavor, and taste and food value was distinctly recognized.展开更多
Recently, microreactors have become available to be fabricated and used safely. The performance of these microreactors depends on the behavior of the multiphase flow hydrodynamics. Gas-liquid flow through T-junction m...Recently, microreactors have become available to be fabricated and used safely. The performance of these microreactors depends on the behavior of the multiphase flow hydrodynamics. Gas-liquid flow through T-junction microchannel reactor is simulated numerically using VOF （volume of fluid） method. 2-D （Two-dimensional） and 3-D （three-dimensional） models of the T-junction microchannel reactor were introduced to the simulations. Both 2-D and 3-D simulations for nitrogen-water flow were performed in the FLUENT （Fluent. Inc.） computational fluid dynamics package. The third direction effect has been studied by comparing the results of the 2-D and 3-D simulations with the published experimental data. Also, the bubble slug length was calculated for the 2-D and 3-D simulations. Furthermore, the hydrodynamics of the flow was studied for the 2-D and 3-D simulations, and compared with other experimental data. The pressure drop, mean bubble velocity, the velocity distribution and the void fraction were calculated and found to be in good agreement with published data.展开更多
The present study demonstrates the comparison of erosion rate of critical pipeline parts, namely elbow and T-junction which face the maximum erosion in a pipeline and may cause an early damage and failure of the syste...The present study demonstrates the comparison of erosion rate of critical pipeline parts, namely elbow and T-junction which face the maximum erosion in a pipeline and may cause an early damage and failure of the system. CFD （computational fluid dynamics） with an Eulerian-Lagrangian approach coupled with an approved erosion model is applied to visualize the 3-D flow behavior of slurry flow in both parts and to predict the erosion rate and the location of erosion at the internal surfaces. The analysis of slurry erosion is performed in five steps; geometry and grid generation, grid study/refinement, fluid flow solution, solid particles tracking and finally, the erosion calculation. In previous publications in literature considering transportation of gas-solid flows in pipe parts, the application ofT-junctions instead of elbows for specified conditions in order to reduce the erosion is recommended. In this article, it is approved that for liquid-solid flows, the Stokes number is reasonably smaller than the values for gas-solid flows. This causes the solid particles tightly couple to the fluid phase and to travel more closely with the fluid streamlines. The effects of important influencing parameters such as feed flow velocity, solid concentration, particle size and shape are investigated in detail in current work. It was found that for liquid-solid flows, the erosion of T-junction for all of the mentioned influencing parameters, due to its geometrical specifications and Stokes number variation in comparison with gas-solid flows, is reasonably higher than erosion of elbow. Due to these findings, in contrary to the gas-solid mixture flows, application of T-junction instead of elbow for liquid-solid flow transportation is not recommended.展开更多
Does a Latin American Philosophy that is more than a copy of European thought exist？ This question determines the historical-systematic presentation of important philosophical approaches in the 20th century in the Sp...Does a Latin American Philosophy that is more than a copy of European thought exist？ This question determines the historical-systematic presentation of important philosophical approaches in the 20th century in the Spanish speaking part of Latin America. Jos6 Marti＇s essay, ＂Our America＂ （1891）, offers the essential topics of Latin American philosophy （liberation, literal plurality, continental and national identity, anti-positivistic emotionalism and intuitionalism, mestizo-philosophy, indigenous wisdom, unity of universal and regional principles, social-practical, ethical and intercultural orientation）. These topics are paradigmatically outlined by means of the portraits of pioneering poets, philosophers, and traditions of Latin America. The most convincing approach of the present seeks for an intercultural formatting and performance of philosophical issues, which includes a sensibility for the hybrid character of many Latin American realities and the attempt to identify universal insights in local traditions. Latin American intercultural philosophy avoids relativism and relies on discovering and developing communal ethical standards which link cultures.展开更多
The experiment was conducted to study the effects of fish meal and sodium butyrate on growth performance, gut development and GLP-2 secretion in weanling piglets. A 2×2 factorial design was used with two fish ...The experiment was conducted to study the effects of fish meal and sodium butyrate on growth performance, gut development and GLP-2 secretion in weanling piglets. A 2×2 factorial design was used with two fish meal levels （0, 5%）, and two sodium butyrate levels （0, 0.3%）. There were 4 dietary treatments： control diet （CD）; control diet supplemented with fish meal （CF）, control diet supplemented with sodium butyrate （CB）, control diet supplemented with fish meal and sodium butyrate （FB）. A total of 44 28-days-old Large White×Landrace weanling piglets were randomly allotted into 4 treatment averagely. The experiment period was 14 days. The results showed that sodium butyrate＇s addition increased average diary gain （ADG）, average diary feed intake （ADFI） and gain to feed intake ratio （G：F） of weanling piglets （all P〈0,05）, improved gut morphology （mucosa thickness, ratio of villous height to crypt depth） and sucrase activity, and fish meal＇s addition increased maltase activity （all P〈0.05）. Either sodium butyrate or fish meal addition decreased cecum colibacillus quantity, sodium butyrate increaded ratio of cecum lactobacilli to colibacillus （P〈0.05）. Consequently, diarrhea was reduced in diet supplemented with fish meal （P=-0.08） and diet supplemented with sodium butyrate （P=0.15） through 14 days of experiment, significant reduction of diarrhea rate was observed in diet supplemented with fish meal through the first 7 days （P〈0.05）. In addition, sodium butyrate and fish meal addition in diets tended to increase plasma GLP-2 concentration, however, GLP-2 concentration on the 4th day was consistently decreased in diet supplemented with fish meal relative to that on day 0 （P=0.08）. Overall, it could be concluded that both sodium butyrate and fish meal addition improve intestinal development and sodium butyrate addition significantly increase growth performance. The gut trophic response to sodium butyrate or may be in agreement with development. peptide GLP-2 increases in fish meal addition in diet and the alteration of intestinal展开更多
The Belt and Road Initiative has brought economic development and prosperity to the countries along its route. Latin America is an important area of economic investment for China, with special focus on oil and gas,How...The Belt and Road Initiative has brought economic development and prosperity to the countries along its route. Latin America is an important area of economic investment for China, with special focus on oil and gas,However, investment is bound to be accompanied by opportunities and risks. Before investing in oil and gas in the corresponding countries, it is necessary to analyze the risk factors from a risk management perspective so as to establish a risk identification system and early warning mechanism. In this way, enterprises can gain competitive advantages and develop in a sustainable way.展开更多
We conduct research on the development of new medicines based on succinic acid, ascorbic acid and rutin. We studied the anti-inflammatory action （exudative inflammation, model of carrageenan-induced paw edema of rats...We conduct research on the development of new medicines based on succinic acid, ascorbic acid and rutin. We studied the anti-inflammatory action （exudative inflammation, model of carrageenan-induced paw edema of rats）, the hepatoprotective （injury of rats with carbon tetrachloride） and renal protectie action. In the study, the anti-inflammatory activity of our medicines （exudative inflammation, karahenin model of inflammatory edema of paws rats） is set to ability of suppression of the inflammatory response by 24.4 %. Against the background, the action of carbon tetrachloride observed a positive effect on cholesterol- and pigment- forming liver function. Reducing the activity of enzymes ALT （alanine transaminase） and AST （aspartate transaminase） in groups of animals, which treated with our medication, talks about their ability to recover morpho functional integrity of the membranes of hepatocytes and warn of changes in the liver damage with carbon tetrachloride. Renal protective action screening study found that investigated mixture capable of increasingly lower level of creatinine in the blood of rats： 27.27-39.18 mmol/L in Lespeflan. Similarly, the concentration of urea in the smaller of the studied using mixtures is 5.18 mmol/L, while the application lespeflanu urea concentration slightly higher is 6.78 mmol/L. This shows that hypoazotemic effect is traced compared with the control group, and better than the comparator Lespeflan. Study of acute toxicity showed that the investigated mixture refers to practically nontoxic drugs. It is confirmed the need for further studies on the pharmacological activity of our facility to determine the effect on capillaries and the immune system, and as a result, prevention and treatment of influenza and ARI （acute respiratory infections）.展开更多
文摘This paper deals with the design, construction and performance evaluation procedure of a solar tunnel dryer in drying fish. A 12 meter long and 2 meter width half-circled tunnel was designed and constructed to dry about 50-100 kg of freshly harvested fishes per batch. The half of the tunnel base was used as the flat plate air heating solar collector and the remaining half as a dryer. The drying air was forced from the collector region （north side） to the drying region （south side） of the half circled tunnel where the product is to be dried. The drying temperature could be easily raised by some 5-30 ℃ above the ambient temperature inside the tunnel at an air velocity of approximately 0.2 m/sec. The test was conducted with 51.5 kg freshly harvested sardines （hall-load） with initial moisture content of 66.5% （wet-basis） to analyze the performance of the dryer. The fishes were dried to a final average moisture content of 15.5% （wet-basis） within three days （30 hours）. It was possible to reach the moisture content level for safe storage within less than three days （30 hrs） with solar tunnel dryer and 7 days in open air natural sun drying. The improvement in the quality of fishes in terms of color, brightness, flavor, and taste and food value was distinctly recognized.
文摘Recently, microreactors have become available to be fabricated and used safely. The performance of these microreactors depends on the behavior of the multiphase flow hydrodynamics. Gas-liquid flow through T-junction microchannel reactor is simulated numerically using VOF （volume of fluid） method. 2-D （Two-dimensional） and 3-D （three-dimensional） models of the T-junction microchannel reactor were introduced to the simulations. Both 2-D and 3-D simulations for nitrogen-water flow were performed in the FLUENT （Fluent. Inc.） computational fluid dynamics package. The third direction effect has been studied by comparing the results of the 2-D and 3-D simulations with the published experimental data. Also, the bubble slug length was calculated for the 2-D and 3-D simulations. Furthermore, the hydrodynamics of the flow was studied for the 2-D and 3-D simulations, and compared with other experimental data. The pressure drop, mean bubble velocity, the velocity distribution and the void fraction were calculated and found to be in good agreement with published data.
文摘The present study demonstrates the comparison of erosion rate of critical pipeline parts, namely elbow and T-junction which face the maximum erosion in a pipeline and may cause an early damage and failure of the system. CFD （computational fluid dynamics） with an Eulerian-Lagrangian approach coupled with an approved erosion model is applied to visualize the 3-D flow behavior of slurry flow in both parts and to predict the erosion rate and the location of erosion at the internal surfaces. The analysis of slurry erosion is performed in five steps; geometry and grid generation, grid study/refinement, fluid flow solution, solid particles tracking and finally, the erosion calculation. In previous publications in literature considering transportation of gas-solid flows in pipe parts, the application ofT-junctions instead of elbows for specified conditions in order to reduce the erosion is recommended. In this article, it is approved that for liquid-solid flows, the Stokes number is reasonably smaller than the values for gas-solid flows. This causes the solid particles tightly couple to the fluid phase and to travel more closely with the fluid streamlines. The effects of important influencing parameters such as feed flow velocity, solid concentration, particle size and shape are investigated in detail in current work. It was found that for liquid-solid flows, the erosion of T-junction for all of the mentioned influencing parameters, due to its geometrical specifications and Stokes number variation in comparison with gas-solid flows, is reasonably higher than erosion of elbow. Due to these findings, in contrary to the gas-solid mixture flows, application of T-junction instead of elbow for liquid-solid flow transportation is not recommended.
文摘Does a Latin American Philosophy that is more than a copy of European thought exist？ This question determines the historical-systematic presentation of important philosophical approaches in the 20th century in the Spanish speaking part of Latin America. Jos6 Marti＇s essay, ＂Our America＂ （1891）, offers the essential topics of Latin American philosophy （liberation, literal plurality, continental and national identity, anti-positivistic emotionalism and intuitionalism, mestizo-philosophy, indigenous wisdom, unity of universal and regional principles, social-practical, ethical and intercultural orientation）. These topics are paradigmatically outlined by means of the portraits of pioneering poets, philosophers, and traditions of Latin America. The most convincing approach of the present seeks for an intercultural formatting and performance of philosophical issues, which includes a sensibility for the hybrid character of many Latin American realities and the attempt to identify universal insights in local traditions. Latin American intercultural philosophy avoids relativism and relies on discovering and developing communal ethical standards which link cultures.
文摘The experiment was conducted to study the effects of fish meal and sodium butyrate on growth performance, gut development and GLP-2 secretion in weanling piglets. A 2×2 factorial design was used with two fish meal levels （0, 5%）, and two sodium butyrate levels （0, 0.3%）. There were 4 dietary treatments： control diet （CD）; control diet supplemented with fish meal （CF）, control diet supplemented with sodium butyrate （CB）, control diet supplemented with fish meal and sodium butyrate （FB）. A total of 44 28-days-old Large White×Landrace weanling piglets were randomly allotted into 4 treatment averagely. The experiment period was 14 days. The results showed that sodium butyrate＇s addition increased average diary gain （ADG）, average diary feed intake （ADFI） and gain to feed intake ratio （G：F） of weanling piglets （all P〈0,05）, improved gut morphology （mucosa thickness, ratio of villous height to crypt depth） and sucrase activity, and fish meal＇s addition increased maltase activity （all P〈0.05）. Either sodium butyrate or fish meal addition decreased cecum colibacillus quantity, sodium butyrate increaded ratio of cecum lactobacilli to colibacillus （P〈0.05）. Consequently, diarrhea was reduced in diet supplemented with fish meal （P=-0.08） and diet supplemented with sodium butyrate （P=0.15） through 14 days of experiment, significant reduction of diarrhea rate was observed in diet supplemented with fish meal through the first 7 days （P〈0.05）. In addition, sodium butyrate and fish meal addition in diets tended to increase plasma GLP-2 concentration, however, GLP-2 concentration on the 4th day was consistently decreased in diet supplemented with fish meal relative to that on day 0 （P=0.08）. Overall, it could be concluded that both sodium butyrate and fish meal addition improve intestinal development and sodium butyrate addition significantly increase growth performance. The gut trophic response to sodium butyrate or may be in agreement with development. peptide GLP-2 increases in fish meal addition in diet and the alteration of intestinal
文摘The Belt and Road Initiative has brought economic development and prosperity to the countries along its route. Latin America is an important area of economic investment for China, with special focus on oil and gas,However, investment is bound to be accompanied by opportunities and risks. Before investing in oil and gas in the corresponding countries, it is necessary to analyze the risk factors from a risk management perspective so as to establish a risk identification system and early warning mechanism. In this way, enterprises can gain competitive advantages and develop in a sustainable way.
文摘We conduct research on the development of new medicines based on succinic acid, ascorbic acid and rutin. We studied the anti-inflammatory action （exudative inflammation, model of carrageenan-induced paw edema of rats）, the hepatoprotective （injury of rats with carbon tetrachloride） and renal protectie action. In the study, the anti-inflammatory activity of our medicines （exudative inflammation, karahenin model of inflammatory edema of paws rats） is set to ability of suppression of the inflammatory response by 24.4 %. Against the background, the action of carbon tetrachloride observed a positive effect on cholesterol- and pigment- forming liver function. Reducing the activity of enzymes ALT （alanine transaminase） and AST （aspartate transaminase） in groups of animals, which treated with our medication, talks about their ability to recover morpho functional integrity of the membranes of hepatocytes and warn of changes in the liver damage with carbon tetrachloride. Renal protective action screening study found that investigated mixture capable of increasingly lower level of creatinine in the blood of rats： 27.27-39.18 mmol/L in Lespeflan. Similarly, the concentration of urea in the smaller of the studied using mixtures is 5.18 mmol/L, while the application lespeflanu urea concentration slightly higher is 6.78 mmol/L. This shows that hypoazotemic effect is traced compared with the control group, and better than the comparator Lespeflan. Study of acute toxicity showed that the investigated mixture refers to practically nontoxic drugs. It is confirmed the need for further studies on the pharmacological activity of our facility to determine the effect on capillaries and the immune system, and as a result, prevention and treatment of influenza and ARI （acute respiratory infections）.
