Silver Nanoparticles Impregnated Biocellulose Produced by Sweet Glutinous Rice Fermentation with the Genus

Bacterial cellulose (BC) is a natural renewable and biodegradable polymer and mostly synthesized from the bacteria genus, Acetobacter. More recent studies on effective biopolymer in various applications have been conducted due to its uniform structure and morphology superior to those of plant cellulose. In this study, the researchers have observed the effectiveness on antimicrobial activity of BC produced by sweet glutinous rice as a raw material instead of cellulosic materials. In the process, sweet glutinous rice fermented by Loog-pang was fermented for alcohol before further making rice vinegar product by inoculating with Gluconacetobacter xylinum TISTR 086, or mixed with indigenous vinegar producers, isolated Acetobacter spp. from our laboratory. Both these two samples gave comparable BC yields and the antimicrobial activity after impregnating with silver nanoparticles and also comparable to the control coconut vinegar medium (2.20 vs 2.00 g/L within 3 days). The optimum conditions for high BC production were pH 4 to 7, temperature approximately 25-30°C, slow agitation (50 to 90 rpm) as well as static cultivation. The remarkable antimicrobial activities of silver nanoparticles impregnated BC products (Ag-BC) showed high tentative in vitro inhibition on common pathogens in contaminated wounds; Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa by agar diffusion test. From this study, Ag-BC produced by fermented sweet glutinous rice (FSR) will therefore be one attractive affordable choice for being biomaterials applied in medical interests, especially skin disinfectant

The innovation construction for the toughness measurement of rice kernel with the inner pressure method

รายงานการวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2553During the rice processing, the possible situations of rice kernel cracking and breakage are commonly occurred and these consequences cause a low marketing price. According to this issue, the real-time observation and together with the knowledge base of mechanical properties should be essentially helpful in detection of these defect observations. The objective of this work was established to study the mechanical stress-strain properties of rice kernels via our in-house pneumatic system design. We found that stress-strain of RD6, RD15, Phitsanulok 2 and Khao Dawk Mali 105 were greater than Khao'Yipun DOAI with moisture content of 20% w.b. These results tentatively indicated the mechanical stress-strains occurred were from the difference of rice shapes. Moreover, we could recognize that the characteristics of these various shapes significantly followed the scaling law of the relation between strain and time. We also found that the breaking force was different value for rice varieties. This parameter obtained can be such a high potential approach that can be used for further developing in the quantitative classification of rice varieties.Rajamangala University of Technology Phra Nakho

A semi-solid state fermentatiom of bioethanol using durian fruit - hull as nutrien source

รายงานการวิจัย--มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2554จากการวิจัยเรื่องการหมักเปลือกทุเรียนแบบกึ่งแห้งเพื่อผลิตไบโอเอทานอล เป็นการอนุรักษ์ทรัพยากรธรรมชาติ และประยุกต์ใช้ของเสีย (Residue/waste) ที่ได้จากการเกษตร เป็นจุดเริ่มต้นของความจำเป็นเร่งด่วนในการพัฒนาเพื่อให้ทรัพยากรที่มีอยู่ให้เกิดประโยชน์สูงสุด โดยการนำประโยชน์ของเปลือกทุเรียนที่เป็นของเหลือ ทิ้งทางการเกษตรที่มีในท้องถิ่น เพื่อนำมาแปรรูปหมักเพื่อให้ได้แอลกอฮอล์เพื่อใช้ประโยชน์เป็นพลังงานเชื้อเพลิงทดแทนน้ำมัน อันก่อให้มีมูลค่าเพิ่มสูงขึ้น เพื่อลดปริมาณสารที่จะต้อง กำจัดก่อนปล่อยออกจากโรงงานอุตสาหกรรมRajamangala University of Technology Phra Nakho

การวิจัยด้านวัสดุปูนฉาบที่เป็นมิตรต่อสิ่งแวดล้อม

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2554This research studies the potential for using waste ash from industrial and agricultural by-products as a plastering material. This paper presents a study of the water requirement, compressive strength, flexural strength, normal consistency, setting time, and air content of plastering material containing classified fly ash (FA) and ground rice husk ash (RHA). Fine fly ash and fine rice husk ash have a high potential to be used as a good pozzolanic material. The use of finer pozzolan results in a stronger and denser mortar which is due to better Q!spersion and filling effect as well as an increase in the pozzolanic reaction. Fine fly ash and fine rice husk ash can be incorporated into mortar as replacement of the mortar mix cement for the plastering. Mortar mix cement containing 20% fine fly ash and fine rice husk ash can be used to make plastering materials.Rajamangala University of Technology Phra Nakho

The Study and development of certain microorganisms with high capability in nanosilver particle biosynthesis

รายงานการวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2556This research report is manipulated that summarized the moment of research project in the subject of “The Study and Development of Certain Microorganisms with High Capability in Nanosilver Particle Biosynthesis”. This project had been take time in 12 mounts. We focused on the isolation of microorganism that from manufacturing process and forming in gems and jewelry industry. Results showed that the initial silver refinery microorganism performed only in terms of Pseudomonas genus especially in AgNO3 solution. In contrast, Bacillus genus was not clearly effective silver refinery. These results could be the basis information for establish and develop system for silver refinery and/or silver quality improvement with biological process especially microorganisms in future.Rajamangala University of Technology Phra Nakho

การตลาดออนไลน์ของสารสกัดจากหญ้าเอ็นยืดหมัก เพื่อส่งเสริมเศรษฐกิจยั่งยืนในชุมชน วิสาหกิจเกษตรปลอดภัยบ้านม่วงเจริญราษฎร์ ตำบลบ่อสวก จังหวัดน่าน

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564The survey team aimed to develop online marketing on Plantago Major Linn. to Promote Sustainable Economy at Ban Muang Charoenraj Agricultural Safety Community, Nhan Province. Ban Muang Charoenraj community is an agricultural community enterprise which has been recently established for two years and begun to cultivate and produce Plantago major L. products and need to develop a better online marketing approach for their interesting products. The research team, therefore, introduced the new approach including the choice of plant stage selection, raw material preparation, making fermented Plantago major L. extract, determination of the properties of the plants that are anti-inflammatory and antioxidant and their antimicrobial activity. The plant extracts were thus developed as a key ingredient in facial creams because of their such good characteristics helping to promote the channel of online marketing. It was on the basis that Ban Muang Charoen community has the plants, good raw materials, good products, one already made online media system of Facebook, therefore, the online media system was suitably developed further and used to be a medium for people to have the opportunity to know more about such products. The work that the research team relied on “Smart Gold principles” which can analyze online marketing practices for two stores. It helped create an opportunity to develop the store to generate more income to be able to improve and develop sales management in the future, obtain more page views, and introduce the community get involved in selling a wide variety of products online as well as transferring the utilization of Plantago major L. from the research team to the community. In the analysis, it was found that it was necessary be able to increase sales by at least 20 percentages, measurable, attainable, consistent with reality, be able to learn and implement in no more than three months. In addition, 2) obtain management guidelines that need to be supplemented further; there must be a promotion to control the quality production of Plantago major L. in the community. Quality and refrain from using pesticides. By promoting the provision of a one-stop service to the community, the online marketing will be a source that can manage the linkage of raw materials to the buyers. Chemicals related to herbal extraction process and the materials for making cosmetic products would be set for creating ease of operation for customers to be able to track budget used, and to easily manage the product quality along the way with a quick and reliable delivery service. It is necessary to encourage a clear analysis of the business plan of each store. From these necessities of the research to promoting online marketing channels for the Ban Muang Charoenraj Agriculture Enterprise Community, a communication channel and promotion for customers can generate income for the anywhere, anytime, without limitation suitable for the current situation.Rajamangala University of Technology Phra Nakho

การตลาดออนไลน์ของสารสกัดจากไคร้น้ำ เพื่อส่งเสริมเศรษฐกิจยั่งยืนในชุมชนบ้านสวก จังหวัดน่าน

รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564The research team aimed to develop a prototype and an online marketing concept of Homonoia riparia Lour. Extracts, which is of interest to the Ban Suak community. Because of the needs of Bo Suak community who are cultivating organic fruit and medicinal plants. The Homonoia riparia Lour. were selected and extracted for cosmetic products. In the study, Homonoia riparia Lour. extracts were extracted and tested for their bioactive compounds having antimicrobial properties and anti-oxidation. Initially, dried Homonoia riparia Lour. leaves were extracted with 80% ethanol at a concentration of 5,000 ppm had moderate antimicrobial properties for Pseudomonas sp. and Penicillium sp. For antioxidants activity, it had antioxidants with DPPH method by performing free radical scavenging IC50 at 0.198 ppm. It was thus promoted for sale on the online market as introduction of Homonoia riparia Lour. extract and facial cream products with Homonoia riparia Lour. extracts. By managing the online market that already exists in the community, an online market of Homonoia riparia Lour. extract for Ban Suak community, Nan province, via Facebook page was developed. The formation of online marketing by presentation of the extraction and the plant’s contents was including the events in many forms such as articles, pictures, videos, questionnaires, etc. Moreover, the community could organize Facebook Events to invite interested people to join and learn, watch demonstrations for the activity. They could try out, test for and buy products. The outcome online marketing strategy of Homonoia riparia Lour. extract via Facebook Page can create success marketing that help consumers to gain knowledge and understand the benefits of the product as well. It also proposed guidelines for improving the process of creating an online marketing model based on the principles of Smart Goals SMART Goals for community people working in stores. The Smart Goals includes Specific, Measurable, Achievable, Realistic, and Timely. Based on the management principles and the acceptance of Ban Suak community in Nan province, it should help create a way to reduce the cost of production, guidelines to help reduce the problem of stocking herbs, and offering fresh ingredients available all the time together with a verifiable tax invoice. It made it easy to understand the management approach to reach the target audience. As a result, customers can come to find themselves and be able to conveniently access the products from anywhere. It thus introduces a performance review approach channels that customers can reach. Numbers of customers who visit the website or fan page will be able to present products and provides services easily.Rajamangala University of Technology Phra Nakho

Scratch-Induced Deformation of Poly(methyl methacrylate) under Dry and Wet Conditions

ABSTRACT Poly(methyl methacrylate) (PMMA), transparent thermoplastic materials similar to glass, was applied in several wide-ranging applications such as cell phone display screens, transparent windows and signboards. However, they are soft and easily appeared poorly transparent properties when getting scratches on their surfaces of applications under dry and wet conditions. Therefore, in this research, the features of PMMA materials after scratch damage was studied by diamond scratch tester under various loads at different environments. The optical microscope was thus applied to investigate the morphology of scratch track on the materials. In addition, the scratch resistance was analyzed by the scratch tester. From the results, the scratch depth was increased with an increasing load in both conditions as well as with the higher stress concentration. The scratch hardness, specific scratch wear rate and scratch coefficient of friction related with the applied load that it affected elastic and plastic deformation state

การคัดแยกเชื้อจุลินทรีย์ที่มศักยภาพในการผลิตเอนไซม์เซลลูเลสจากผักเหลือทิ้งและเปลือกผลไม้ เพื่อใช้ในการหมักแอลกอฮอล

รายงานการวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2560The research team has isolated the cellulase producing microorganisms which have capability in producing extracellular cellulase enzyme for cellulosic degradation from leftover agricultural waste materials such as fruits and vegetables. After cellulosic material degradation, the products mainly were sugar moiety being the starting materials for further alcohol fermentation and/or possibly being used in cultivation of common microorganisms. In the study, when different 49 bacterial isolates were tested for their cellulase activity on Carboxymethyl cellulose (CMC), two bacteria, Bacillus spp. CE08 and 49 were selected due to high cellulase activity and thus tested for the physical and chemical properties. Their 16S rDNA sequence comparisons were close to Bacillus sp. isolate obtained from the soil. Both isolates are common aerobic/facultative aerobic bacteria with the length of 1-3 μm, Gram positive, and preferring the fermentation of maltose and xylose to glucose while minimal degradation on sucrose and lactose contents. Their optimum digestibility was at 40°C, pH 4.5 for the broth having unpurified extracellular cellulase activity at 3-4 μg /mg. The enzyme could use the substrateCMC the best, but rice straw more slowly but better than grass. However, the enzyme displayed the least digestion effectiveness on cotton. Both of these isolates are expectedly applied in the biological degradation process substituting chemicals that cause pollution problems to the environment. Additionally, this is one promise way to bring value of agricultural waste to the community.Rajamangala University of Technology Phra Nakho