VRU Research and Development Journal Science and Technology

DEVELOPMENT OF KHANOM SOMMANAT SUPPLEMENTED WITH POMELO ALBEDO FIBERS

2021-04-29T15:36:14+07:00

The purposes of this study were to study the appropriate recipes of Khanom Sommanat, to evaluate the results of supplementing the products with 0, 1, 3 and 5 percent of pomelo albedo fibers calculated from the total weight of the mixture and to examine the physical, chemical and biological properties of the products. It was found that the appropriate recipe was the 3^rd recipe, with the highest average scores of the appearances, colors, smells, tastes, textures and overall preference of 7.50, 7.70, 7.60, 7.80, 7.70 and 7.8 respectively. The ingredients were egg white (35.5%), grated and roasted coconut (30.54%), sugar (30.48%), lemonade (1.68%) and cocoa powder (1.80%). The appropriate amounts of the pomelo albedo fibers for the 3^rd recipe were studied. It was found that the supplement of the pomelo albedo fibers (5%) had the average scores of the appearances, colors, smells, tastes, textures and overall preference of 7.33, 6.23, 6.45, 6.93 ,6.93 and 7.47 respectively. By analyzing the physical, chemical and biological properties, it was found that Khanom Sommamat supplemented with the pomelo albedo fibers (5%) had the L* a* b* values of 66.29, 9.39 and 13.62. Regarding the chemical properties, the moisture was measured at 6.03 percent which was lower than that of the original recipe. The fat content measured at was 27.91 which was lower than that of the original recipe. The supplement increased the fiber content of Khanom Sommanat for 6.80 percent, ash for 0.83 percent and protein for 3.90 percent. The supplement did not affect the total amount of microbes, yeasts, and funguses.

EFFECTS OF SUPPLEMENTING YEAST AND YEAST PRODUCTS AS FEED ADDITIVES IN LAYER DIETS ON PRODUCTIVE PERFORMANCE AND EGG QUALITY TRAITS

2021-04-29T15:36:15+07:00

Yeast and yeast products are rich in nutrients and nutraceuticals. They can be used in improving egg production and egg quality as a consequence. The aim of this study was to investigate the effect of supplementing yeast and yeast products as feed additives in layer diets on performance and egg traits. A total of 250 commercial laying hens, aged 32 weeks, were randomly distributed in completely randomized design. The hens were distributed into 5 treatments. The experimental treatments were basal diets, basal diets supplemented with 5.0% whole cell yeast, basal diets supplemented with 2.0% autolyzed yeast, basal diets supplemented with 0.25 % nucleotide, and basal diets supplemented with 0.05% beta-glucan. The treatments lasted for 8 weeks. The resulted showed that those supplemented with whole cell yeast increased most of the egg weight (p<0.05) during 36-37, 38-39 and 32-39 weeks old. The feed intake of layer in treatments of whole cell yeast and nucleotide supplementation was significantly higher (p<0.05) than other treatments during 34-35 weeks old. The better (p<0.05) feed efficiency ratio was founded in those fed with whole cell yeast during 36-37 weeks old, which was 5.94 % lower than that of the control group. . This value tended to be better than the other treatments (p=0.081) during 38-39 weeks old. Nucleotide supplementation significantly exhibited the highest value (p<0.05) of Haugh unit score and albumen hight during 34-35, 36-37, 38-39 and 32-39 weeks old. Supplementing yeast and nucleotide contributed to a larger egg size compared to those without supplementation (p<0.05). Supplementing the diets with whole cell yeast was beneficial for increasing egg weight and improving feed conversion ratio. Supplementing nucleotide in laying diet improving albumen quality. Supplementing both whole cell yeast and nucleotide in layer diet increased the number of larged-size eggs.

DESIGN OF VIVALDI ANTIPODAL ANTENNA 2.4 GHz FOR WIRELESS POWER TRANSMISSION APPLICATION

2021-04-29T15:36:17+07:00

This paper presents the Vivaldi Antipodal antenna 2.4GHz for wireless power transmission application based on the design of tapered slot antenna slender micro-stripe with bandwidth. The proposed antenna had the symmetric dissipated energy plane of electrical and magnetic fields, which was also easy to adjust the equilibrium of impedance. In addition, the antenna was designed using computer simulation so as to obtain the parameters which are suitable for Wi-Fi communication. The simulation results showed that the antenna had the dimension of 75x75 mm. The material was a PCB of the FR4 type with the dielectric constant of 4.4, the operating frequency band with in the range of 2 – 6 GHz, a feedback loss of less than -10 dB, and a gain of 4.5–9.48 dBi. The antenna had the directional energy dissipation and high gains which were good for wireless power transmission application, when connected with a rectifier circuit that acted as a conversion from AC power to DC power. A set of antennas at a frequency of 2.4 GHz would get a power factor of -20 dBm which can be converted converting to DC 0.913V, 20mA. The voltage from multiple receiver antenna units could be connected in series to increase the DC voltage and power.

COMPARISON BETWEEN MEALWORM (TENEBRIO MOLITER L.) WASTE AND CHEMICAL FERTILIZER ON THE GROWTH AND YIELD OF SELECTED-PSU GREEN PEPPER

2021-04-29T15:36:18+07:00

Utilization of mealworm waste, excreted from the mealworm (Tenebrio moliter L.), which provided plant nutrient and improved soil. The objective of this study was to compare meal worm waste and chemical fertilizer application on the growth and yield of Selected-PSU green pepper. The experiment was conducted in Randomized Complete Block Design, each with 3 replications; T1 for non-fertilizer (control), T2 for chemical fertilizer application as 21-0-0 at 10 kg/rai and 15-15-15 at 20 kg/rai, and T3 for mealworm waste at 60 kg/rai. The results showed that plant growth and yield components such as fruit-length and width fruit thickness and fresh weight were not significantly different. However, there was a statistically significant difference (p<0.05) in yields. The chemical fertilizer application treatment gave the highest yield followed by mealworm waste application and control, respectively. These results indicated that the application of mealworm waste had similar effects on the growth and yield as chemical fertilizer application. Thus, the mealworm waste can be used for pepper production and is considered a sustainable agricultural method for plant production. However, the potential of mealworm waste dramatically varied according to insect diets. Therefore, the nutrient elements in the waste of mealworms and the appropriate ratio of application should be analysed for each plant production.

ANALYSIS OF SOCIAL DISTANCES OF STUDENTS AT FACULTY OF MANAGEMENT SCIENCES, NAKHON RATCHASIMA RAJABHAT UNIVERSITY STUDENT IN ONLINE EXAMINATION DURING THE COVID-19 CRISIS WITH GEOGRAPHIC INFORMATION SYSTEM

2021-04-29T15:36:19+07:00

This research aims to study the spatial distribution and analyze of social distancing in online examinations of the students majoring in Business Computer and Accounting, Faculty of Management Science, Nakhon Ratchasima Rajabhat University during the Covid-19 crisis. The information about addresses of 170 students was analyzed. With the mixed method research, qualitative information about the students’ addresses was transformed into quantitative data so that the spatial data were analyzed with the GIS program and the descriptive statistics were analyzed with a statistical program. The results of the study revealed that 1) the methods for creating spatial databases from students’ addresses, filled in Google forms and analyzed in Google Sheets with the location deviation of 5.8 %, to map on Google maps, were able to correctly locate the location at the rate of 94.2 %; 2) the data analyzed using the Nearest Neighbor Index, with the QGIS program, showed that it was clustered in distribution pattern (R_n = 0.55), and the map showed that the place where the students took the exam was very dense near the university area; 3) the pair with the shortest and longest social distance was 0.00 and 236,541.5 meters, respectively. When grouping the shortest social distances into ranges (500 meters per range), it showed that 50.0% of them were in the at the shortest social distance of more than 2,500 meters, followed by that within 500 meters (16.5 %).

DEVELOPMENT OF MOBILE APPLICATION FOR REPAIR REQUESTS IN STUDENT DORMITORY

2021-04-30T09:32:13+07:00

The objectives of this research were 1) to design and develop a repair notification system for student dormitories as a mobile application and 2) to evaluate the efficiency of the repair notification system. The development of the system used PHP in conjunction with the MySQL database, and the user interface utilized HTML, CSS, Bootstrap, and jQuery Mobile to support both mobile and web applications. The research tools consisted of the repair notification system for student dormitories, performance evaluation form filled by five experts, and the satisfaction questionnaire of the sample chosen from dormitory teachers, dormitory students, dormitory staff, dormitory housekeepers, and maintenance technicians of Nakhon Si Thammarat Rajabhat University. The samples were selected purposively result in a total of 130 people.

The research results are as follows: 1) the repair notification system in student dormitory via a mobile application could reduce the process of coordination and close contact of users. The dormitory had a system for managing parcels and dormitories for receiving and dispatching parcels 2) the evaluation of the system performance from the experts in all aspects was at a high level ( = 4.39, S.D. = 0.52), and 3) the overall user satisfaction assessment were at a high level ( = 4.41, S.D. = 0.68).

SOLAR POWER GENERATION DEMONSTRATION SYSTEM FOR COMMUNITY FOUNDATIONS AT A HOUSEHOLD LEVEL

2021-04-29T15:36:22+07:00

The aim of this research were 1) to study the development of solar power generation demonstration system for community foundations at a household level and 2) to integrate the research’ results with teaching and learning in the primary school. In this research, a demonstration set of solar power systems which laying onto a whiteboard size of 82 cm width, 110 cm length, and thickness of 22 cm was developed. The demonstration set was able to generate electricity by the 120-watt solar panal through the control device whish charged the battery of 20 amperes to the battery of 12 volts, 80 amperes. The DC current was converted to AC power with a 1,000-watt inverter. The circuit board was installed to prevent the power generation exceeding XH-M609 which was compatible with the solid state relay 40 amperes. The electricity storage capacity was tested at 3 levels of discharge depth 40 % (12.20 volts),
60 % (11.90 volts) and 80 % (11.50 volts). The result showed that the appropriate duration to keep the full charge was within one day at a discharge depth of 40 %. Here, the battery can be recharged to full power within a period of 6, 8 and 11 hours, respectively, which can prolong the lifetime of battery life and the higher charge. After the integration of teaching and learning about the electric generator with the students in Primary school (Prathom 1-6)
of Watmongkolwuttawas School, the 5-point rating scale assessment method was used to measure the satisfaction level of undergraduate students of Faculty of Industrial Technology, Rambhai Barni Rajabhat University, the lecturer and other related participants, in total of 217 representative samples. The main results were summarized as follows: 1) the level of satisfaction with knowledge, the understanding of the representative samples with the topic in the theory of electrical energy had the highest value with the score of 4.40 (88.00 %), 2) the satisfaction of the expertise’s knowledge had the highest value with the score of 4.60 (92.00 %) and 3) the application of knowledge, the representative samples could use the knowledge to modify by effectively reduction in energy consumption with the score of 4.54 (90.80 %) which had the highest score.

STUDY ON THE PROPERTIES OF NON-LOAD-BEARING CONCRETE BLOCKS PRODUCED FROM BASALT DUST MIXED WITH BAGASSE ASH IN MUANG BURIRAM DISTRICT

2021-04-29T15:36:23+07:00

The objective of this research was to study the properties of non-load bearing concrete blocks produced from basalt dust mixed with bagasse ash in the area of Muang Buriram District. The research process started with testing the properties of concrete blocks produced and sold in Muang Buriram and nearby areas. After that, the samples of concrete block made up of basalt dust blocks mixed and without bagasse ash were produced.
The physical properties of the concrete block were tested 28 days had passed and the compressive strength was tested after 14 days, 28 days, and 60 days had passed, respectively. The concrete blocks were divided into 3 groups: Group 1, concrete blocks produced and sold in Muang Buriram District and nearby areas; Group 2, concrete blocks produced from basalt dust; and Group 3, concrete blocks produced from basalt dust mixed with bagasse ash.
The results of this research showed that most concrete blocks in Muang Buriram District and nearby had the average compressive strength through the criteria but smaller than the requirements of Thai Industrial Standard (TIS 58-2530). The concrete blocks with thin cavity walls and thin shell tended to be denser than those with thick cavity and thick shell. However, the concrete blocks from basalt dust with proportion of bagasse ash at 0.15 by cement weight tended to be denser than those without bagasse ash. The water absorption and porosity of concrete blocks decreased with increasing cement content or bagasse ash mixture at proportion of 0.15 by cement weight. In case of equal compressive strength,
the concrete blocks produced from basalt dust use more cement than those produced from lime dust. Furthermore, the concrete block mixed with bagasse ash reduced production costs while maintaining the same strength. Besides, the compressive strength of concrete blocks
is increased approximately 7-8% if the bagasse ash was added at the proportion of 0.1-0.2 by cement weight.

DEVELOPMENT OF MALA CURRY PASTE FOR THE CONCENTRATED MALA BROTH PRODUCT

2021-05-20T16:14:15+07:00

This study concerns the development of a Mala curry paste recipe for the concentrated Mala broth product. Here, 3 Mala curry paste recipes were developed and compared with the commercial recipe. The most satisfied recipe was the 3^rd one which contains6.58% of Hwa Jiao, 6.58% of black pepper, 0.88% of dried chili, 6.58% of chili powder, 6.58% ofcumin, 2.19% of garlic, 7.02% of Ginger, 6.58% of Pae-Lo powder, 2.19% of salt, 15.35% of brownsugar, 13.16% of soy sauce, 13.16% of hoisin sauce, and 13.16% of olive oil. The concentrated Mala broth was processed by mixing the Mala curry paste with clear broth and heated at 100ºc for 10 minutes. Then, its was placed into 250 ml sterilized bottles containin, and cooled immediately. When diluted, the Mala soup had sensory acceptance scores as follows: color (6.15), smell (6.30), taste (6.67), spiciness (6.71) and overall taste (6.80) (medium-high preferred). The concentrated Mala broth product had L^*, a ^*and b ^* values of 30.51, 5.55 and 6.44, respectively. The difference was not statistically significant with the commercial recipe and the a_w values of Mala curry paste and the concentrated Mala broth were 0.74 and 0.98, respectively.

MATHEMATICAL TECHNIQUES ON ESTIMATION OF WATER DROPLET VOLUME ON HYDROPHOBIC SURFACE

2021-04-29T15:36:25+07:00

The volumes of droplet on the hydrophobic surface can be calculated to investigate the liquid adsorption efficiency, infiltration rate, and evaporation kinetics. An elaborate method has been recently proposed by calculating the rotation axis of an ellipse, the slope of hydrophobic surface plane, and the integral over spherical coordinate. The result of this method could be done with high accuracy. Since the surface plane slope can be neglected, the hydrophobic surface plane was assumed in this work as a flat line with zero slope. The two-dimensional water droplet figure was likely symmetry, the rotation method is then applied to approximate the water droplet volume. Moreover, the curve of the water droplet was approximated by a quadratic function. A simplified method to estimate the droplet volume was proposed in this work yielding acceptable accuracy.

STUDY OF NANO ZINC OXIDE EFFECTS ON THE INCREASING SHADES VARIATION PROCESS OF COTTON YARN DYED WITH NATURAL TUMERIC DYE

2021-04-29T15:36:26+07:00

This study aimed to study the process of increasing the number of natural dyes on cotton yarn from turmeric together with Nano-zinc oxide on color value and color fastness of cotton yarn; and the dyeing model for household industry comparing with the color obtained from the laboratory.This study was performed by using chemical measurement, wavelength measurement based on the CIELAB color system to identify color values, color fastness to washing and light fastness test, and compare the color values obtained from household dyeing process with the laboratory. The findings indicate that the best shade multiplication process was Method 4(2), the dye water extracted from Turmeric, Pea Flower, Rosella and Sappan dyed together with color stabilizer with 0.05% Nano-zinc oxide, and Method 3, staining water extracted from Pea Flower, Roselle and Sappan stained with yellow-orange color from turmeric dye. This made the cotton yarn obtain the red and yellow values most. The lightness values (L*) obtained were in the range of 45.73 – 67.64, the red/green values (a*) were in the range of 22.79 - 0.82 whereas the yellow/blue values (b*) were in the range of 29.88 - 72.49. The obtained cotton yarn had good properties in light fastness and color fastness to washing. There was no difference in color yield between the cotton yarn dyed with household process and the laboratory.