Graph Microbial transglutaminase (MTGase) is an enzyme widely used in the food industry. In this study, MTGase had been applied to produce fresh cheese made from whole milk powder. To evaluate the impact of factors in reconstituted milk under the treatment of MTGase, a set of 18 experiments was conducted. Besides, a response surface methodology (a central composite design) was applied to evaluate the quality properties of fresh cheese according to the objective functions of hardness, yield, protein content, total solid content, and sensory evaluation score. In detail, enzyme concentration (0.6-3.0U/g protein), reaction temperature (30-60°C), and reaction time (1.5-6.0h) were three factors used in this model. The results showed that all these functions reached the optimal values at treated temperature, reaction time, and enzyme concentration of 36.14°C, 4.53h, and 2.59U/g protein, respectively. Furthermore, scanning electronic micrographs also showed that the network structure of the experimental products became more uniform under enzymatic treatment. The quality properties of fresh cheese (sensory evaluation score, syneresis, acidity, and the total number of lactic acid bacteria) met the CODEX STAN 243-2003 revised 2010 for the fermented milk products. Generally, following 28 days of storage, the quality properties of fresh cheese samples are stable.

In this study, an innovative two-dimensional solid oxide fuel cell (SOFC) stack based on a horizontal structure was developed. Planar anode-supported cells were utilized and integrated into a twodimensional SOFC stack. The stack was designed to be operated in parallel as a large single cell and in series as a stack. The stack consisted of fuel and oxidant chambers, which allowed good heat transfer for preheating of the fuel inlet. These chambers inhibited the cooling effect of fuel (and oxidant) and thus improved the cell performance. Additionally, the two-dimensional SOFC stack model was designed for the perpendicular flows of fuel (and oxidant) directed to the electrode surfaces of the cells. This ensured the effective diffusion of fuel and oxidant between the anode and cathode surfaces, respectively. When the cells were connected in parallel, the two-dimensional stack functioned as a large single cell that generates a high current. When the cells were connected in series, the stack generated a high voltage. This innovative two-dimensional SOFC stack thus functioned as a large single cell and as a stack.

Background: Through the research process, the topic has selected a number of tactical coordination exercises, then applied them to chess classes at Ho Chi Minh City University of Technology and Education (UTE). Methodsː 66 male students in their 20s are divided into 2 groups of experiments (34 students) and control (32 students) all participating in the chess experiment program. Resultsː After the time of applying tactical coordination exercises, the results of tests performed by the experimental groups and control groups both increased, but the experimental group’s growth was more superior than control group’s (Means of of all 6 tests were significant difference with P <0.05). It shows that the rationality and effectiveness of the tactics coordination exercises selected to be included in the chess curriculum to improve the calculating capacity for students after a period of 4 months of experiment.