Srisang, Siriwan
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Srisang, Siriwan
Main Affiliation
Email
siriwan.sr@kmitl.ac.th
18 results
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Item type:Publication, Rapid and accurate classification of Aspergillus ochraceous contamination in Robusta green coffee bean through near-infrared spectral analysis using machine learning(2023-03-01); ; ; Near-infrared (NIR) spectral-based classification of Aspergillus ochraceous contamination in the Robusta green coffee bean was investigated. Six different learning algorithms, including linear discriminant analysis (LDA), support vector machine (SVM), k-nearest neighbors (KNN), decision tree (Tree), Naive Bayes (NB), and quadratic discriminant analysis (QDA), were applied for the investigating purpose. Four classes of fungal contamination on coffee beans, non-fungal contaminated beans on day 1 and day 3 (NCB-D1 and NCB-D3) and fungal contaminated beans on day 1 and day 3 (CB-D1 and CB-D3), were set for the classification intention. Based on the 6 learning algorithms, the Tree approach was optimal, displaying a training accuracy of 97.5%. As proven by the testing dataset, the classification accuracy of the Tree was also at 97.5%. With this number, the Tree could correctly classify 100% between the contaminated and non-contaminated coffee beans. These findings exhibit the potential of the NIR spectroscopy accompanied by machine learning for the early detection of fungal contamination in green coffee beans. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dip- and Spray-coating of Schanz pin with PLA and PLA nanosphere for prolonged antibacterial activity(2021-10-01); Nasongkla, NorasedIn this study, variation of coating parameters was performed to determine a suitable condition for a vancomycin-coated Schanz pins in poly(lactic acid) (PLA) for prolonged antibacterial activity. Herein, the solvent used to dissolve the polymer (DCM vs. CHCl<inf>3</inf>), the concentration of the polymer in the solvent (2 vs. 5% w/v), the vertical withdrawing speed of the implant from the solution (0.4 vs. 2.4 cm/s), and the number of dip-coating cycles denoted in layers (1 L vs. 3 L) were investigated for its drug loading. Results showed that the optimal parameters were at 2% w/v PLA in DCM at 0.4 cm/s withdrawing speed and at 3 cycles for a high vancomycin loading with low deviation in result. Another experiment was performed by varying the concentration (1, 2, 4% w/v) and number of dip-coating cycles (10 L, 20 L, 30 L) which finalized 2% w/v PLA at 10 cycles as the optimal drug loading at 2.04 ± 0.09 mg. When observing the drug-release profile, the prior formulation released 2.21 ± 0.01 mg or 92.88 ± 0.44% of drug in one week. To reduce the amount of drug release in the first week, the method was further improved by spray-coating with PLA nanospheres (PLA-NS) for multiple cycles (10-, 20-, and 30-NS) to prolong drug release. After one, two, and three weeks, the drug-release were around 76%, 80%, and 88%, respectively. However, more drugs were lost as the number of cycles increases which suggests that lower (10-NS) coating cycle is better. Therefore, the final process was selected to be 2% PLA dip-coated for 10 cycles then spray-coated with PLA nanosphere for 10 cycles. Results showed that this method can help prolong release for at least 24 days. A short-term bacterial and cytotoxicity tests were done for 3 days with no S.aureus formed nor cytotoxicity. These results supported that the coating was successful in inhibiting the growth of S.aureus. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, In silico investigation of ACE2 and the main protease of SARS-CoV-2 with phytochemicals from Myristica fragrans (Houtt.) for the discovery of a novel COVID-19 drug(2022-09-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Clay tiles production using palm ash, spent bleaching earth, and palm fiber as substitute materials(2020-01-01); The objective of this research was to study the clay tile (CT) production using palm ash (PA), spent bleaching earth (SBE) and palm fiber (PF) as substitute materials. The effect of ingredients and PF length on CT qualities were investigated. The ingredient of clay: PA: SBE: PF used three proportions as following 58: 20: 20: 2, 56: 20: 20: 4, and 54: 20: 20: 6 (% by weight, wt). Each ingredient used the fiber length of 15 and 25 mm. The crystalline phase of raw materials was inspected. The CT after production were examined qualities as accorded with Thai industrial standard (TIS) in terms of water absorption, bulk density, acid corrosion and transverse breaking strength (TBS). Results showed that the clay tile qualities in terms of bulk density and acid corrosion were in the acceptable level as 1.45-1.65 g/cm<sup>3</sup> and less than 0.03%, respectively. The water absorption quality was more than 6.5% and the TBS was below 600 N. Hence, this research also revealed that the all wastes (PA, SBE, PF) from palm oil industry can be used to produce the clay tile. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Enhanced biodiesel purification using coffee husk bioadsorbents: The role of pyrolysis temperature, KOH activation, and adsorption efficiency(2025-05-01); ; ; ; Ruttanadech, NuttapongThis study evaluates the performance of bioadsorbents derived from coffee husk pyrolyzed at temperatures of 600, 700, and 800 °C (CH600, CH700, and CH800), along with activated CH700 (ACH700), in biodiesel purification. The results indicate that CH700 significantly enhances biodiesel purity, with optimal purification conditions achieved at a dosage of 2 wt% CH700, a stirring rate of 400 rpm, and a contact time of 45 min. CH700 demonstrated modest performance, achieving approximately 20 % removal of methanol and water. However, after activation with potassium hydroxide (KOH), ACH700 demonstrated improved efficiency, achieving 96.92 % methanol removal and 39.46 % water removal. ACH700 also refined biodiesel quality to meet EN14214 standards and maintained a higher biodiesel yield compared to other adsorbents. The bioadsorption process is influenced by the chemical interactions between the surface functional groups of the bioadsorbent and the contaminants, which is further enhanced by the optimized pore structure of ACH700. The use of ACH700 represents a novel and highly effective approach to biodiesel purification, combining both technical efficiency and economic feasibility. Furthermore, the valorization of agricultural waste adds significant environmental benefits, reinforcing the potential of ACH700 for large-scale biodiesel production. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Production of Biomass Briquette from Residual Bleaching Earth and Empty Palm Bunch(2017-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Fabrication of Eco-Friendly Pineapple Leaf Fiber-Based Vegan Leather for Environmental Sustainability(2026-01-20); ; ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Layer-by-layer dip coating of Foley urinary catheters by chlorhexidine-loaded micelles(2019-02-01); Nasongkla, NorasedChlorhexidine-loaded poly(ethylene glycol)-block-poly(ε-caprolactone) micelles (CHX-micelles) were prepared by the solvent evaporation method and were used to coat urinary catheters. The layer-by-layer (LbL) dip coating technique was used to coat the micelles onto the catheters, which consisted of the alternation of coating with CHX-micelles and poly(acrylic acid). The number of LbL nanocoating cycles was varied, and the properties of the coated catheters were investigated for their drug content and the coating thickness. The optimal coated catheter had 90 bilayers, which provided the maximum CHX content at 32.3 ± 1.4 μg/cm<sup>2</sup>, and the thickness of the thin film on these coated catheters was 6.87 ± 0.36 μm. Coated catheters were studied in the in vitro CHX-release, antibacterial activity, cytotoxicity, and hemolytic activity. Drug release from the coated catheters was controlled, and bacteria proliferation was inhibited for up to 6 days. Results suggest that the antimicrobial activity of the coated catheter reduces the adherence of uropathogens to the catheter's surface. The cytotoxicity and hemolytic activity of the coated catheters showed biocompatible properties. The coated catheter presented the potential to inhibit uropathogen colonization and formation. This nanocoating technology can also be applied to other medical implants that carry the risk of infection. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Recycling spent bleaching earth and oil palm ash to tile production: Impact on properties, utilization, and microstructure(2021-04-20); Spent bleaching earth (SBE) and oil palm ash (PA) were recycled to utilize as substitute material for producing tile. The proper quantity of SBE and PA in three clay groups (40, 60, and 80% by weight) was explored combined with varying compression pressure (90, 100 and 110 bar) and firing temperature (1000 and 1100 °C). All conditions were analyzed the influence and interaction of producing factors, i.e. mixture (M), compression pressure (C), and firing temperature (F) on tile attributes. Tile utilizations (water absorption, strength, acid resistance, color and leaching heavy metal) and cost were compared with the commercial tile. The microstructures were also examined. Results found that the mixture B at high clay group provided low water absorption ≈ 5–6%, moderate TBL ≈620–630 N, low corrosion ≈0.015–0.026%, and there were cheaper cost and better utilizations than commercial tile. Mixture B detected enough quartz and mullite which provided more strength. Hence, the SBE and OPA can be utilized for tile production with the tile properties agreed with industrial standard. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An innovative chitosan-coated aquatic feed pellets production from coastal waste using top-spray fluidized bed drying(2026-12-01);