Rajamangala University of Technology Srivijaya Research Journal

A Preliminary Study of Selecting Agricultural Waste for Cultivation of Lentinus polychrous

2022-08-22T10:34:37+07:00

The objectives of this research were (1) to isolate a pure culture of Lentinus polychrous and screen for its ability to utilize cellulose, (2) to study the growth of L. polychrous on three mycological media including potato dextrose agar, malt extract agar and cornmeal agar, and (3) to grow this mushroom on five types of agricultural waste including corn husk, rice straw, coconut meal, coconut coir, and sugarcane bagasse. The results showed that L. polychrous was able to produce cellulase enzyme and grew well in all three media. When this mushroom was cultivated on agricultural waste and the jars were incubated at 25°C for six weeks. It grew in all five substrates and grew best on coconut meal by producing dense and compact mycelium both inside and on the surface of the substrate. Therefore, coconut meal is a good alternative substrate for mushroom cultivation.

Effect of Biological Process on -aminobutyric Acid and Phenolic Compounds Content of Tubtim Chumpare and Sinlek Brown Rice

2022-10-25T10:03:38+07:00

Gamma-aminobutyric acid (GABA) serves as a major inhibitory neurotransmitter in mammalian nervous systems and phenolic compounds act as antioxidants. Hence, the purpose of this research was to study the effect of biological process on -aminobutyric acid and phenolic compounds content of Tubtim Chumpare and Sinlek brown rice by allowing both rice species on germination and following Lactobacillus sp. fermentation. The highest GABA content in Tubtim Chumpare of 2.866±0.324 mg. g^-1 was found at the conditions under germinated rice which was 4-fold higher than that of brown rice without germination (0.723±0.174 mg. g^-1) while comparison of Sinlek brown rice with and without germination and following Lactobacillus sp. fermentation, GABA production of brown rice with germination and following 12 h of fermentation increased more than 23-fold (0.254±0.053 to 5.880±0.207 mg. g^-1). For the total phenolic compounds content analysis, the result showed that Tubtim Chumpare brown rice gave the highest amount at the conditions of brown rice without germinated process (28.313±0.506 mg gallic acid equivalent. g^-1) whereas Sinlek brown rice increased from 5.624±0.603 to 8.212±0.458 mg gallic acid equivalent. g^-1after germination and following 24 h of fermentation. These results indicate that biological processes can enhance GABA production in both brown rice and increase total phenolic compounds content in Sinlek brown rice which could improve the nutritional value for nutraceutical product development in the future.

Potency of Natural Phage in Pseudomonas aeruginosa Lysis

2022-09-20T10:41:43+07:00

A phage, also known as a bacteriophage, is a bacteria's natural predator. Phages can sustain themselves by relying on bacteria to increase their numbers. Many pathogenic bacteria are now resistant to antibiotics. Therefore, phages can be used as an alternative method to kill antibiotic-resistant bacteria. Pseudomonas aeruginosa is an antibiotic-resistant bacterium because it can produce biofilm, which contributes to more resistance than other bacterial species. In this study, a natural phage capable to destroy P. aeruginosa was isolated. It was found that the shape of the PAMFUP2 lytic phage under a transmission electron microscope belonged to the Myoviridae family. It had a lytic life cycle that was able to destroy P. aeruginosa by causing a clear zone lysis. The phage PAMFUP2 was specific to P. aeruginosa TISTR 1287 strain in a specificity test. It was also able to inhibit P. aeruginosa TISTR 357, but not the other bacterial strains. The phage PAPMFU2 less than 20% could destroy P. aeruginosa TISTR 1287 when incubated in a solution with a pH value of 3 and a temperature of at 70°C. The stability of destructive capacity was maintained when the pH solution was in the range of 3-12. Additionally, a single PAMFUP2 phage could inhibit bacteria growth for up to 7 hours. Phage PAPMFU2 significantly (P < 0.01) inhibited biofilm formation of P. aeruginosa TISTR 1287. Based on the above characteristics, natural phage PAMFUP2 could be used to destroy P. aeruginosa in the future.

Isolation and Screening of Antagonistic Bacteria for Inhibition of Pathogenic Fungi in Rice

2022-09-15T15:53:32+07:00

This study aims to isolate soil bacteria from rice fields and to determine antifungal activity of the isolates. Ten soil samples were collected in Bang Len district areas areas: Lam Pa Ya, Bang Sai Pa, Nil Phet, Sai Ngam and Bua Pak Tha subdistricts, and were cross streaked on Tryptic soy agar (TSA) medium. A total of 112 bacteria was isolated. Dual-culture antagonistic tests were conducted for all bacterial isolates against rice pathogenic fungi on PDA medium at 28°C for 5 days. The findings showed that only 3 isolates, namely N5-5, G4-1 and G5-5, had antifungal activities against Rhizoctonia solani, and only 4 isolates, namely N1-1, N5-5, G4-1 and G5-5, had antifungal activities against Bipolaris oryzae. However, all isolates had no antifungal activity against Pyricularia grisea. Selected bacteria were cultured in nutrient broth medium for 18 hours, and cell turbidity was adjusted OD 600 nm to 0.5 (10⁸cell/ml), added 1% inoculum in NB medium and incubated at room temperature (25-30^oC) at 200 rpm shaking rate for 48 hours. The cells were centrifuged at 12000 rpm at 4^oC for 2 min. The supernatant was added to the PDA medium at a ratio of 2:18. The antifungal activities were measured as the mean colony diameter for growth inhibition. One of the isolates (G4-1) had a moderate level of antifungal activity against R. solani at 54.29%, whereas the isolated N5-5 had the moderate level of antifungal activity against B. oryzae at 55.55%. Next, the optimization of antifungal production was studied in an NB medium at pH 3, 5, 7 and 9, respectively, and shaked at 200 rpm at 25, 30, 35 and 40°C for 48 hours. Results demonstrated that the isolated G5-5 cultured at pH 5 and 25°C had a very high level of antifungal activity against R. solani at 85.33% and B. oryzae at 66.94%. The morphological study of antagonistic bacteria G5-5 showed that it was a gram-positive rod with single and linear cell arrangement and endospore development. Therefore, we suggest that the antagonistic bacterium belongs to the genus Bacillus.

Diagnosis of Pneumonia on Chest Radiographs Using Machine Learning

2022-09-06T11:00:49+07:00

This research proposes a method for diagnosing pneumonia on chest radiographs using a variety of machine learning methods for disease analysis. Most pneumonia is caused by a respiratory infection, such as bacteria or viruses, and pneumonia causes pleurisy, a condition in which fluid fills the lungs, making it difficult to breathe. The researchers developed a computer-aided pneumonia diagnosis system for the automatic diagnosis of pneumonia by designing a data group design and using a machine learning model: support vector machine (SVM), K-Nearest Neighbor (KNN), Artificial Neural Network (ANN), Adaptive Boosting (AdaBoost) and Logistic Regression. By this method, the weight-mass binding technique was adopted by using the values of the assigned weights from learning data, obtained scores, matrix assessment guidelines, precision standard, recall, F1 score, and area under the curve to be generated as weight vectors for learning guidance. Learning groups and test results were based on a series of chest radiographs of the dataset for experimental use. In this test, the 1,340 images of normal lungs and 1,704 images of abnormal lungs were divided into data sets for learning, and another group of images used as test data that consisted of 233 images of normal lungs and 390 images of abnormal lungs. Based on the research, the developed program was able to analyze the test images with speed and the discriminatory accuracy results yielded 94.38 percent and 84.9 percent of both base-learned and non-learned data, respectively.

Comparison of Growth Rate, Feed Intake and Feed Cost of Mud Crab, Scylla paramamosian and S. olivacea Fattening

2022-08-30T15:25:10+07:00

The objectives of this study were to compare the growth, feed intake and feed cost of mud crab fattening under hatchery conditions. Two treatments used in the study were: 1) fattening of mud crab species Scylla paramamosian and 2) species S. olivacea, with 15 replicates per treatment, at 20 days. The results showed that S. paramamosain had an average percentage of body weight gain (11.15±2.54%) and specific growth rate (0.70±0.15%/day) higher than S. olivacea (9.05±2.55% and 0.57±0.15%/day, respectively). However, both crab species exhibited similar daily feeding rates, averaging 2.95±0.54 and 2.71±0.59% of body weight/day for S. Paramamosain and S. Olivacea, respectively. The average feed cost for cultivating both crab species did not significantly differ, ranging from 149.35 to 159.80 baht/kg. From the research, the cultivation of S. Paramamosain resulted in higher weight gain compared to S. Olivacea, highlighting the significance of crab species in influencing growth outcomes. This finding emphasizes the importance of considering crab species as a crucial factor in the economic aspects of crab cultivation, aiming for higher production yields.

Development of Bird Guarding Systems with Image Processing Techniques and High-Frequency Waves

2022-12-26T11:47:06+07:00

Raising Red Tilapia in cages is often accompanied by birds eating fish during the first culturing period. Guarding against bird infestation has increased the number of red tilapia. Anti-bird detectors currently use infrared detection to detect them. It cannot be separated from other living things, like birds, and therefore it is not suitable for guarding bird infestations in cages or on the ground. Therefore, the research team had an idea to develop bird guarding systems with image processing techniques and high-frequency waves by bringing in image processing principles to help distinguish between terrestrial beings that are birds or not. If a bird-like object was found to be greater than or equal to 50%, the system will send the status to the ESP8266 board and then perform a high-frequency repulsion by randomly selecting three types of frightening sounds, namely an eagle barking, a dog barking, and the sound of firecrackers. The research method is divided into four steps: planning, analysis, design, and implementation. The results demonstrated that the YOLOv6-s algorithm achieved an accuracy of 0.084. In terms of processing speed, it operated at 0.1 frames per second, and the F1-Score was determined to be 0.082. High-frequency sound can guard birds against a distance of 5 to 10 meters.

Rajamangala University of Technology Srivijaya Research Trends: Bibliometric and Visualized Analysis

2022-10-10T14:03:59+07:00

The purpose of this paper is to use bibliometric analysis tools to explore and examine the research productivity for Rajamangala University of Technology Srivijaya. The research data sets were obtained from the Scopus database, and the time period was set from 2005 to 2022. The data were analyzed by means of VOSviewer and Bibliometrix software, and graphical knowledge maps were created. It looked at how publications, distribution, h-index, co-authorship, and research hotspots have changed annually. Five hundred twenty-four publications altogether were attained. The findings indicated an increase in the number of research publications during the study period. Most of them were from agricultural and biological sciences. Internet of things, transmission electron microscope, water quality, wood plastic composite and microstructure were the trend topics. The study is helpful for researchers in identifying current research contexts, trends, and the future research and development directions of Rajamangala University of Technology Srivijaya.

Substrate Culture from Leaf Sheath of Banana and Sawdust

2022-07-19T14:52:40+07:00

The purpose of this study was to find out the balanced proportion and characteristics of substrate culture derived from mixed leaf sheath of banana and sawdust. Starch paste was used as cementing agent. The proportions of leaf sheath of banana and sawdust of 4 ratios were as follows: 1) 100:0, 2) 75:25, 3) 50:50, and 4) 75:25 by weight (4 replications). The results of the physical study found that all ratios were able to form substrate culture. The physical appearances of substrate culture were well adherent. The average dry weight was in the range of 121.10-130.06 gram. The bulk density was in the range of 0.27 - 0.29 g/cm³. The average water absorption was high in all proportions at the average of 217.40-299.98%. The average decomposition was 11.04-16.75%. The pH of most substrate culture was moderately acidic (pH 4.78-6.38) and the Electrical Conductivity (EC) was in the range of 1.70-7.23 dS/m. In addition, the macronutrients (nitrogen (N), phosphorus (P) and potassium (K)) were found in all proportions with more potassium (K) content compared to other nutrients. Considering the quality of each proportion, the third proportion was the most appropriate for developing as substrate culture. This proportion is easily obtainable, exhibits good water retention, possesses safe pH for plants, and is convenient for handling and transportation. Specifically, it has an average bulk density of 0.28 g/cm3, water absorption of 252.98%, dissolution in water of 14.56%, electrical conductivity of 2.67 dS/m, pH of 5.89, and nutrient content of 0.09%, 0.05%, and 1.45% for N, P, and K, respectively.

Effect of the Plant Spacing and Stem Characteristics on Growth of Dwarf Napier (Pennisetum purpureum cv. Mott)

2022-07-01T14:09:23+07:00

Animal husbandry has become increasingly popular, leading to a shortage of forage. The dwarf Napier grass can be a good forage grass. Therefore, the purpose of this research was to study the effect of plant spacing and stem characteristics on the growth of dwarf Napier grass at the Agricultural Training Center, Loei Rajabhat University. The experiment was a 3x2 factorial in the randomized complete block design, involving 2 factors. The first factor consisted of three plants spacing viz. 50x30, 50x40 and 50x50 centimeters and the second factor was made up of two stem characteristics viz. 2 and 3 buds per stem. The data were recorded every 10 days until dwarf Napier grass was 40 days after planting. The results showed that dwarf Napier grass was statistically different in all characteristics at 40 days of planting. The dwarf Napier grass planted at a spacing of 50x30 cm showed the highest statistical significance in terms of leaf length, plant height, stem diameter, yield per plant, and total yield. Using cutting with two-bud stems resulted in larger leaves, more shoots, greater plant height, stem diameter, yield per plant, and total yield. Therefore, the combination of a planting spacing of 50x30 cm and using cuttings with two buds per stem showed the most favorable growth conditions for Napier grass. This information is valuable for promoting efficient cultivation practices for famers engaged in livestock farming, particularly those focusing on Napier grass as animal feed.

Study of Chemical Composition of Organic Liquid Product from Catalytic Cracking Process using Response Surface Methodology

2022-12-19T11:16:25+07:00

The palm oil has the potential to use as a source for liquid fuel production. The catalytic cracking process with a HZSM-5 catalyst was carried out in the horizontal reactor to produce organic liquid product (OLP). The composition of OLP was analyzed in the fraction of olefins, paraffins, naphthenes, aromatics, oxygenated and mixed naphthenes - aromatics. The aim of this research was to study the influence of temperature (400 - 600 ^oC) and weight hourly space velocity (WHSV) (23.20 – 68.70 hr^-1) on the composition of olefins, paraffins and aromatics in organic liquid product (OLP). The quantity of product distributions was analyzed and modeled using the response surface method (RSM). The predicted results showed that the composition of olefins, paraffins, naphthenes, aromatics, oxygenated and mixed naphthenes - aromatics at the temperature 461.9 ^oC and WSHV 23.2 hr^-1 was 19.5%, 13.9%, 7.0%, 29.8%, 18.8% and 10.8%, respectively. These were very close to the verification experiment results. Therefore, the models for the prediction of the product distributions were adequate and statistically significant. The optimum residence time for OLP production was 20 min. Based on the finding in this work, it provides insights into the operational factors for maximizing the quantity of olefins, paraffins and aromatics. Moreover, it has tremendous guiding significance to the efficient operation of transforming palm oil into biofuels.

Development of Horizontal Warping Wheel Machine

2023-01-03T10:33:56+07:00

Yarn warping preparation is called “warping”. Warping is a step in the yarn preparation process aimed at obtaining suitable yarn length and the desired number of yarn strands. Warping is both important and difficult, because the step requires labor and long periods of time in practice. This study, therefore, was aimed at solving these problems by designing a warping machine which reduces the distance that the operators need to walk during the process, rendering the warping process more convenient, less time-consuming, and less labor-intensive. This study designed a prototype of a warping machine which relied on the rotation of a horizontal, cylindrical warping wheel to wind the yarns. The wheel can rotate in both clockwise and counterclockwise directions. The warping wheel contained two main moving parts, namely, the movement of the wheel (rotating) and the movement of the ball screw with the linear guide (moving along the wheel). The utilization of the horizontal warping wheel machine demonstrated a 56.45% decrease in the time required for warp preparation, a reduction of 66.66% in the number of wheel operators, and a complete elimination of the distance operators had to walk during yarn warping, as compared to the traditional warp preparation method.

Synthesis of ZnO/CuO Composite by Microwave Method for Photocatalytic Degradation of Rhodamine B

2022-06-06T16:09:41+07:00

Zinc oxide/cupric oxide (ZnO/CuO) composite with a high crystallinity and purity phase without impurity was successfully synthesized via a microwave method for use as a photocatalyst in the degradation of rhodamine B. The synthesis process used zinc acetate and cupric acetate as precursors. The suspensions were treated via microwave irradiation at 450 W for 10 min followed by a constant-temperature calcination process at 300^๐C for 3 h. The phase transitions, functional group, morphologies, and elemental compositions of the resulting synthesized powders were characterized via X-ray powder diffraction, Scanning Electron Microscopy, and Energy dispersive X-ray spectroscopy. ZnO/CuO crystals were found to be mixed phases of hexagonal zinc oxide and monoclinic cupric oxide. The functional group is composed of Zn-O and Cu-O bonds. The morphology is agglomerate granular with a particle size of 0.25 x 0.47 µm. The elemental compositions contain Zn, Cu, and O with 35.8%, 32.6%, and 15.8%, respectively. The experimental findings showed that the microwave method is the cause of favorable chemical and physical properties for the photocatalytic powder reaction, such as high purity phases, high crystallinity, and high uniformity of the ZnO/CuO powders. The photocatalytic degradation of rhodamine B using these ZnO/CuO powders under UV light illumination was studied. The rhodamine B concentration analysis was done using UV-Vis spectrophotometry. The highest rhodamine B degradation efficiency by the ZnO/CuO was 80.68 % in 240 min at a kinetic rate constant of 0.0065 min^-1.

Effect of Sodium Hypochlorite on Sterilization and Shoot Induction of In Vitro Gros Michel

2022-07-19T16:10:51+07:00

Musa acuminata cv. Gros Michel is originated from the Southeast Asia region. It is considered as an economically important fruit tree in Thailand. The suckers are commonly used for propagation and plant tissue culture for increasing new pathogen-free plants and genetic uniformity. This research was divided into 2 experiments. The first experiment investigated the effectiveness of different concentrations of sodium hypochlorite on surface sterilization of sucker including treatment 1 10 % NaOCl followed by 5 %, treatment 2 20 % NaOCl followed by 10 % and treatment 3 30 % NaOCl followed by 20 %. The second experiment examined 4 concentration levels of BA at 0, 2.5, 5.0, and 7.5 mg/l. The results revealed that NaOCI at 30% followed by 20% showed no statistically significant difference in survival (100%) compared to NaOCI at 20% followed by 10% (91.67%) after one month of cultivation on MS medium. In experiment 2, at 0 mg/l BA showed the best growth in terms of plant height, leaf length, leaf width, and root length at 6.60, 5.82, 2.47, and 11.27 cm, respectively after three months of cultivation. However, multiple shoot formation was not obtained after culturing for 3 months. The culture medium with 5 mg/l BA could induce multiple shoots, with the observation of four new shoots after culturing for three months.

Size Relationships of Plastic Debris on 3 Sandy Beaches in Rayong Province

2022-10-17T11:04:56+07:00

Sandy beaches are hotspots for accumulation of marine debris from direct human activities as well as those transported by the wind and currents. Plastic is the most common type of debris found on beaches, and this plastic debris can be divided into 4 different size classes: macroplastic (MAP, >25 mm), mesoplastic (MEP, 5-25 mm), large microplastic (LMP, 1-5 mm), and small microplastic (SMP, <1 mm). In this study, we analyzed the amount of plastic debris in the intertidal zone of 3 beaches in Rayong Province: Ao Makhampom, Suanson and Maptaphut. The results showed that different areas had significantly different amounts of plastic debris (p<0.05). The greatest amount of MAP, MEP and SMP was found on Ao Makhampom beach; most of which were fragments and fibers. LMP, however, were most commonly found on Maptaphut beach; most of them were polypropylene pellets. Interestingly, the vast majority of fiber type -LMPs were polyethylene and were likely from fishing nets and ropes. On the other hand, most of fiber type-SMPs were made of cotton blended with other synthetic polymers, rayon and nylon. These small fibers were perhaps from clothing and laundry activities. The relationships between MAP and SMP (r = 0.642) on all 3 beaches, and between MEP and LMP (r = 0.719) for Suanson beach were found. Such relationship between large plastic debris and microplastics could be used for rapid prediction of microplastic contamination on sandy beaches. In addition, a correlation was found between the microplastic content in sand sediments and in stomach of moon crab (Matuta victor) (r = 0.882), indicating the possibility of using moon crab as a bioindicator of contamination of microplastics on sandy beaches.

The Development of the Elderly’s Semantic Web for Supporting the Healthy Tourism Planning in Khao Kho District, Phetchabun Province by Using Ontology and Content-Based Filtering Technique

2022-07-18T16:01:15+07:00

This research aimed to 1) survey the behavior, potential and need of the elderly for healthy tourism in Khao Kho District, Phetchabun Province, 2) develop a semantic web that is suitable with the elderly for supporting the healthy tourism planning by using the ontology and the content-based filtering, and 3) assess the users’ satisfaction toward the semantic web. The samples classified in 2 groups include 384 elderly people who traveled in Khao Kho District according to Cochran's formula by using the convenience sampling for surveying the behavior, potential, and need of health tourism and 30 elderly people who were selected by the purposive sampling method used to assess the satisfaction toward the semantic web. The results found that most of elderly travel for relaxing, suffer from the potential body and the technology using skill problem at a high level, and have an opinion that the semantic web’s defined functions is necessary at a high level. The semantic web’s functions consisting of 4 parts are 1) searching the semantic tourism places, 2) giving the tourism data’s rating and processing the content-based filtering, 3) mapping the node name and attribute name between the ontology and relational database with the API mapping tool in the level of class, property, attribute, and value, and 4) displaying the tourism recommendation. The semantic web’s performance in recommending information has F-measure of 94.7%. The elderly have satisfaction toward the semantic web at a high level.

Sorption Isotherm and Quality Changes during Storage of Snack from Green Mussel and Hom-Kradang-Nga Rice

2022-08-30T14:35:18+07:00

Sorption isotherms of mussel and Hom-kradang-nga rice snacks were determined at 35 °C and 45 °C with a controlled humidity system using a saturated salt solution with aw ranging from 0.2 to 0.9. It was found that the equilibrium humidity of the product increased as the aw value increased at constant temperature. The characteristic shapes of the curve plotted between moisture content and aw values of snack were sigmoid. GAB mathematical models highly correlated with the experimental data of the equilibrium moisture content of products at 35°C and 45 °C. The SEE values were 1.10 and 1.13, respectively, and the R² value was 0.99. Additionally, L* color and hardness values decreased during the 4-week storage at room temperature (p<0.05). While moisture content and aw tended to rise (p<0.05), a* and b* color values were not significantly different (p>0.05). Furthermore, the product was safe for consumption because the total microbial count was less than 1x106 cfu/g. The yeast and mold content did not exceed 100 cfu/g. The snack product received an overall liking score in the range of 6.70- 7.10 (out of 9) indicating a slightly moderate liking.

Effects of Sungyod Rice Flour and Maltodextrin on Quality of Cookies

2022-08-30T13:58:22+07:00

The purpose of this study was to determine the effects of wheat flour substitution with Sungyod rice flour (0, 40, 60, and 80 by weight) and maltodextrin (0, 30, 50, and 70 by weight) on physical qualities (color value and texture testing), chemical qualities (humidity and fat) and sensory testing of cookies. It was found that the increasing amount of Sangyod rice flour resulted in a decrease of L* and b* values, but an increase of a* value and hardness of cookies. The sensory values in terms of color, flavor, taste, crispness, and overall liking had significantly improved (p£0.05). Consumers showed the highest preference score at 60% of rice starch. Increasing maltodextrin content in cookie product did not significantly affect the color values (L*, a* and b*) and the moisture values (p>0.05). The hardness value will increase significantly (p£0.05). The substitution of Maltodextrin at 30% in cookies received favorable score in taste and the highest overall preferences (8.18).

The Comparison on Growth of Neck Orange (Citrus reticulate Blanco) Grafted on Five Citrus sp. Rootstock

2022-06-07T10:50:13+07:00

The present study was about the comparison on growth of Neck orange (Citrus reticulata Blanco) on five Citrus sp. rootstocks containing with Native pomelo (C. grandis (L.), Thongde pomelo (C. maxima (Burm.f.), Citron (C. medica), Kaffer lime (C. hystrix), and Bitter orange (C. × aurantium). To evaluate the suitable rootstock for Neck orange production, five-year-old Neck oranges were grafted with five different Citrus sp. rootstocks in a cleft method. It was performed by cleft grafting with branches that were 5 years old. The sample plants were planted in 17-inch polybags for 7 months at the Fruit Department of Plant Science, Faculty of Agriculture, Rajamangala University of Technology Srivijaya, Nakhon Si Thammarat Campus. A completely randomized design (CRD) with five replications and four trees per representative was used for the experiment. The result showed that rootstock of Bitter orange generated the highest average plant height, 40.31 cm, with a significant difference, followed by Kaffer lime, Native pomelo, Thongde pomelo, and Citron, at 38.44, 38.32, 37.15, and 21.68 cm, respectively. In the case of scions’ height, the rootstock of Bitter orange gave the highest of average height of scions (23.30 cm), followed by Kaffer lime, Native pomelo, Thongde pomelo, and Citron, at 21.75, 21.74, 15.67, and 11.30 cm, respectively. In addition, after 7 months of cleft grafting, the highest number of branches per tree of Neck orange was found on the orange tree from a rootstock of Bitter orange. It was 4.47, and the next highest numbers were 4.45, 4.40, 2.64, and 2.42 branch/tree for Kaffer lime, native pomelo, Thongde pomelo, and Citron. Therefore, Bitter orange is a superior rootstock choice than Citrus sp.

Design of Bamboo Wardrobe Furniture Products by Applying Kansei Engineering Technique

2022-06-08T11:45:09+07:00

This research aims to design bamboo wardrobe furniture products by applying Kansei engineering techniques and to create an idea for designing wardrobe products that can respond the behavior and needs of consumers. Initially, the survey data were analyzed by using quantification theory type l (multiple linear regression) in the form of a forecast equation for expressing the relationship between Kansei words and product characteristics to make a new product model. This study revealed the bamboo wardrobe products are designed and developed the product characteristics in the area of use, the material used to make the plates on the wardrobe, the opening style of the door, the appearance of the wardrobe, and the structure of the wardrobe in accordance with the emotions, feelings, and needs of consumers. The results of this study showed that new wardrobe products developed product characteristics in line with a sense of identity, which has the greatest impact on consumer satisfaction. The average satisfaction score is 4.50, which is good. Additionally, it was found that this research serves as a guideline for helping designers to design new products that can better respond to consumer behavior and needs.