คลังสารสนเทศดิจิทัล AgriNova⁺
AgriNova⁺ is the institutional digital repository of Maejo University, dedicated to preserving and providing open access to the university’s academic, research, innovation, and cultural heritage in agriculture and related sciences.
The repository contains a wide range of content, including theses, research reports, academic articles, textbooks, teaching materials, learning media, university archives, and Lanna knowledge. It supports teaching, research, policy decision-making, and community engagement.
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การพัฒนารูปแบบธุรกิจท่องเที่ยวโดยชุมชน อำเภอสะเมิง จังหวัดเชียงใหม่
Neenart Sangkhasilapin; นีนาถ ศังขะศิลปิน; Neenart Sangkhasilapin; นีนาถ ศังขะศิลปิน; Yutthakarn Waiapha; ยุทธการ ไวยอาภา; Maejo University (Maejo University, 2567)
The purpose of the research was to develop model of community-based tourism management at Sameong district, Chiang Mai province. The objectives of this study were to: 1) analyze the potential at Sameong district, Chiang Mai province 2) determine marketing strategies for community-based tourism business at Sameong district, Chiang Mai province 3) create a community-based tourism business model in service design for sustainable tourism development at Sameong district, Chiang Mai province. This research used two data collection tools which include: 1) a questionnaire was used to collect data from the non-probability sampling tourists with quota sampling 2) a structured interview with the discussion group of all thirty-four-participating community-based tourism.
The result of the first objective found out that tourists evaluated the area’s potential to a high degree based on their responses and purchasing decisions across four distinct dimensions:1. The purchase timing is high (average 2.52) 2. the dealer choice is rated at an average of 2.45; 3. the brand choice is on average 2.37; and 4. the purchase amount is 2.36 on average. However, the product choice dimension was moderate, with an average rating of 2.25. From the interview with the samples who are community-based tourism members, it was found that the tourism supply in Sameong district, Chiang Mai Province, can be categorized into three aspects: 1) tourist attraction potential; 2) tourism activities and tourism programs potential; and 3) additional services and public participation potential.
The result of the second objective found out that the marketing strategies for community-based tourism business at Sameong district, Chiang Mai province was in WO strategy with five marketing mix factors combined with 1) product 2) promotion 3) people 4) productivity and quality and 5) physical evidence.
The result of the third objective has been found out that there were four elements consisted of 1) Participatory Action Research in AIC technique 2) Marketing Mix 3) SWOT Analysis and 4) service design process.
Effects Of Dietary Synbiotics On Growth Performances
And Immune Improvement In Nile Tilapia (Oreochromis Niloticus)
Arporn Panase; อาพร ปะนาเส; Arporn Panase; อาพร ปะนาเส; Mongkol Thirabunyanon; มงคล ถิรบุญยานนท์; Maejo University (Maejo University)
This research was divided into two parts to investigate the effects of Bacillus subtilis, Fructooligosaccharide (FOS), and synbiotic (B. subtilis and FOS combination) on growth performances, immunity improvement, and disease resistance of Nile tilapia (Oreochromis niloticus). The first trial, fish (24.5 ± 1.6 g) were fed a basal diet (G1), supplemented with 1 g/kg (G2), 3 g/kg (G3) and 5 g/kg (G4) of FOS as well as diets supplemented with 1x109 CFU/g (G5), 3x109 CFU/g (G6) and 5x109 CFU/g (G7) of B. subtilis for 56 days. After the feeding trial, the complement C3, IL-1β, TNF-α, IFN-γ and hsp70 gene expression in the liver was then analyzed by a quantitative Real-time PCR. Then, fish were infected with Streptococcus agalactiae, and the survival rate was recorded. The results showed that FOS and B. subtilis had no significant effect (P>0.05) on growth performances and survival rate. Lysozyme activity was significantly greater in the G4, G5, G6, and G7 groups. Also, all fish fed FOS and B. subtilis showed significantly (P<0.05) higher respiratory burst activity than other groups. The expressions of complement C3, IL-1β, TNF-α, IFN-γ and hsp-70 in the liver were significantly higher for fish fed 5 g/kg of FOS as well as for fish that received any concentration level of B. subtilis (P<0.05) used in the study. However, after the S. agalactiae challenge test, the survival rate of fish-fed diets supplemented with FOS and B. subtilis was slightly higher than the control group.
The second trial, the effects of synbiotics between B. subtilis and FOS combination on growth performances, immunity improvement, and disease resistance of Nile tilapia. The fish (24.5 ± 1.6 g) were fed a basal diet (G1), diets supplemented with 1 g/kg FOS + 1x109 CFU/g B. subtilis (G2), 3 g/kg FOS + 3x109 CFU/g B. subtilis (G3) and 5 g/kg FOS + 5x109 CFU/g B. subtilis (G4) for 56 days. The results showed that synbiotics had significant effect (P<0.05) on growth performances including average daily gain (ADG) and survival rate compared with a control. Lysozyme activity and respiratory burst activity were significantly (P<0.05) greater in the G3 and G4 groups. The gene expressions of complement C3, IL-1β, IL8 and Hsp70 in the liver were significantly up-regulated in tilapia fed with 5 g FOS/kg feed + 5x109 CFU/g of B. subtilis (P<0.05) synbiotics. The TNF-α and IFN-γ gene expression of tilapia fed with 3 g FOS/kg feed + 3x109CFU/g of B. subtilis were significantly higher compared with the control group (P<0.05). After the S. agalactiae challenge test, the survival rates of fish-fed diets supplemented with synbiotics were higher than for the control group.
The results indicated that the FOS, B. subtilis and synbiotic supplementary feeds could stimulate immune responses in tilapia. However, further investigation of other prebiotics or herbs in combination with B. subtilis is encouraged at molecular levels and screening for beneficial metabolites that may increasingly improve digestive enzymes, growth performances, and health benefits in tilapia. In addition, on-farm experiments are needed.
Identification And Mapping Of A Dwarfness Related Genes In Watermelon (Citrullus Lanatus)
Namfon Chomkaeo; น้ำฝน จอมแก้ว; Namfon Chomkaeo; น้ำฝน จอมแก้ว; Saengtong Pongjaroenkit; แสงทอง พงษ์เจริญกิต; Maejo University (Maejo University)
Dwarfism is a desired agronomic trait in watermelon. Genetic analysis revealed that dwarf growth habit is controlled by a single recessive gene (dwarf; dw). Linkage analysis of F2 derived from inbred watermelon KK-6939 (viny plant) and TH-15974 (dwarf plant) lines, positioned the dw locus at the terminal region of chromosome 9. Using the gene annotation data derived from watermelon reference genome “97103”, 25 genes were located between WMSNP-0002750 and WMSNP-0002780 markers. Only 2 out of 25 candidate genes, Cla015407 and Cla015408 encode a gibberellin 3-beta-hydroxylase (GA3ox). Only the SNP (G/A) at the position 626th nucleotide of Cla015407 could distinguish dwarf plants from viny plants. This point mutation is an acceptor splice site lead to altered splicing site happening moved from 626th to 639th nucleotide and then 13 bp were deleted in exon 2 resulting in truncated protein in dwarf plants. Even though Cla015408 encoded the same protein as Cla015407 but the expression of Cla015408 could not be detected from quantitative and semi-quantitative RT-PCR in seedling stage. Therefore, Cla015408 could not function instead of Cla015407 in dwarf plants. These results suggested Cla015407 should be the dw gene. The high throughput of functional marker, Cla015407-GA was developed from SNP 626th and validated in various inbred lines. This functional marker consisted completely with the phenotype. So this marker has high accuracy and high value to implement in a watermelon breeding program.
ค่าตอบแทน คุณภาพการสอบบัญชี และการวางแผนภาษี
Pichayapohn Samaputra; พิชญาภร สามะบุตร; Pichayapohn Samaputra; พิชญาภร สามะบุตร; Sathaya Thanjunpong; สัตยา ตันจันทร์พงศ์; Maejo University (Maejo University, 2565-11-07)
The purpose of this study is to study a relationship between compensation, audit quality and tax planning of listed companies in the Stock Exchange of Thailand (SET). The data were collected from annual reports during the year 2013-2017. The sample comprises of 864 samples. Compensation was measured from director compensation, audit committee compensation and executive compensation. Audit quality was measured from audit firm, audit tenure, auditor rotation and audit fees. Tax planning was measured by effective tax rate (ETR), the ratio of tax to cash flows from operating activities (TAX/CFO) and the ratio of tax to total assets (TAX/ASSET). The statistical devices employed in the analysis were Mean, Standard Deviation, Pearson’s correlation coefficient, and Multiple Linear Regression analysis. The results of the study show that executive compensation and audit fees has a statistically significant positive relationship with tax planning. And director compensation, audit tenure and auditor rotation has a statistically significant negative relationship with tax planning.
การแยกเนื้อในเมล็ดลำไยออกจากเมล็ดเพื่อเป็นวัตถุดิบอาหารสัตว์
Masarud Phongtean; มาศรุจ พงษ์เทียน; Masarud Phongtean; มาศรุจ พงษ์เทียน; Sunate Surbkar; สุเนตร สืบค้า; Maejo University (Maejo University, 2566)
This thesis is a study of methods for separating longan seed coats. The pulp inside the seeds is used as raw material for animal feed. This is because the pulp in longan seeds has nutritional value quite similar to that of animal feed corn. Including it also helps reduce costs for animal farmers. As well as managing the use of by-products and agricultural waste to zero from the dried longan pulp processing group and the longan pulp processing group into the canned longan factory. The specific objective of this thesis is to study the separation of the inner pulp from the seed coat. The separated flesh will be used as raw material for animal feed. The objective is to design and develop a longan seed peeling machine. To study the effect of mechanical cracking variables on the performance of separating longan seed husks. and for the relationship between separating longan seed shells The longan seeds used in the test were seeds during the growing season. which came from the longan coring factory, house number 290, Village No. 14, Mae Faek Mai Subdistrict, San Sai District, Chiang Mai Province The following properties are available for longan seeds that are grown during the season. It has a rather round shape. Because the average seed roundness is close to 1, the initial moisture content is 37.36 percent, the base is wet. Considered to be at a relatively high level. As a result, they cannot be preserved in normal atmospheric conditions. Therefore, it is necessary to quickly reduce the humidity to a low level in order to be able to preserve it in the long term. And the average size of the seeds used in the test was 10.62±0.71 millimeters by designing, building, and testing. Preliminary testing was done to test the type of sieve. in designing the type of grating The circular hole sieve comes from the smallest size of longan seeds after drying. The oval hole grid comes from the grid of a coffee bean sheller. The square hole sieve comes from the development of the sieve of the coffee bean sheller. The distance between the tip of the wedge and the grid is 7.7 millimeters and the linear velocity is 4.084 meters per second. Analysis of shafts and screens using computer programs The force can be used from the results of the study of force used for crackers. which uses a torque of 15.92 newtons per meter Set the clamping point to be fixed, resulting in a maximum von mises stress value of 1.485×106, 3.671×105 newtons per square meter. which is less than the yield strength of AISI 304 material, allowing chipping to be used without damage. The lowest factor of safety distribution value is 6.682×105, 2.056×1011. The highest resultant displacement value is 1.09×10-3, 1.387×10-4 millimeters and obtained the highest equivalent strain value of 2.859×10-6, 8.320×10-7 and performance testing of the longan seed sheller. Longan seed shelling speed of 1,400 rpm provides the best performance. It gives a separation efficiency of 81.19%, a separation efficiency of 37.79%, a working rate of 97 kilograms per hour. and the residue was 1.27%. The study of longan seed preparation for use as animal feed raw material. It has the following nutritional values: 7.20 percent protein, 2.34 percent fat, 3.58 percent fiber, 0.523 percent calcium, and 3,946 kilocalories of energy. It has seed morphology. The polyphenol compounds extracted from longan seed pulp have an effect on increasing the weight of poultry. As for the specific smell of the flesh of longan seeds There is no effect on the taste of poultry feed. The poultry gained an average of 49.10 - 53.46 grams of body weight per bird per day. It has no effect on the production performance of poultry. Including no harmful effects causing the death of poultry. But the polyphenol compounds extracted from longan seeds must be used in the right amount.