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Sustainable techniques to enhance novel techno-functional properties and modulate starch digestibility of polyphenol-rich red rice flours with varying amylose content
(2025-07-15)
Luangsakul, Naphatrapi
;
Van Ngo, Tai
Red rice flours performed modification using sustainable techniques, including ANN (annealing), HMT (heat moisture treatment), US (ultrasound), Pregel (Pregelatinization), WM (wet-microwave treatment), and DM (dry-microwave treatment). Manpo rice flour, which is high in amylose, demonstrated higher peak viscosity compared to flours from medium-high amylose rice (Hommali rice), under the same treatment conditions. The reduction in swelling power observed after ANN and HMT treatment in both varieties corresponds with the pasting behaviors of these flours. All samples exhibited notable shear-thinning properties. Pregel samples exhibited rapid digestion, with the maximum RDS levels reaching 35.4 % for Manpo rice and 37.3 % for Hommali rice. While, the structure of US samples changed, resulting in enhanced polyphenol bioaccessibility and decreased digestion rate. The lowest eGI recorded in US samples was 60.7 for Manpo rice and 61.5 for Hommali rice, with polyphenol bioaccessibility at 180 min measured at 37 % and 28.8 %, respectively. This study documents the impact of sustainable practices on the properties of red rice flours, thereby enhancing its culinary applications for future commercialization.
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Geographical origin identification of Khao Dawk Mali 105 rice using combination of FT-NIR spectroscopy and machine learning algorithms
(2024-10-05)
Lapcharoensuk, Ravipat
;
Moul, Chen
The mislabelled Khao Dawk Mali 105 rice coming from other geographical region outside the Thung Kula Rong Hai region is extremely profitable and difficult to detect; to prevent retail fraud (that adversely affects both the food industry and consumers), it is vital to identify geographical origin. Near infrared spectroscopy can be used to detect the specific content of organic moieties in agricultural and food products. The present study implemented the combinatorial method of FT-NIR spectroscopy with chemometrics to identify geographical origin of Khao Dawk Mali 105 rice. Rice samples were collected from 2 different region including the north and northeast of Thailand. NIR spectra data were collected in range of 12,500 – 4,000 cm<sup>−1</sup> (800–2,500 nm). Five machine learning algorithms including linear discriminant analysis (LDA), partial least squares discriminant analysis (PLS-DA), C-support vector classification (C-SVC), backpropagation neural networks (BPNN), hybrid principal component analysis-neural network (PC-NN) and K-nearest neighbors (KNN) were employed to classify NIR data of rice samples with full wavelength and selected wavelength by Extremely Randomized Trees (Extra trees) algorithm. Based on the findings, geographical origin of rice could be specified quickly, cheaply, and reliably using combination of NIRS and machine learning. All models creating by full wavelength and selected wavelength exhibited accuracy between 65 and 100 % for identifying geographical region of rice. It was proven that NIR spectroscopy may be used for the quick and non-destructive identification of geographical origin of Khao Dawk Mali 105 rice.
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Assessment of farmers’ acceptance, satisfaction, and utilization of mobile application for rice production cost and return in Chachoengsao Province, Thailand
(2024-05-01)
Kerdsriserm, C.
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Suwanmaneepong, S.
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Llones, C.
;
Athipanjapong, P.
Using descriptive analysis, the results revealed that the rice production database, accessible through the mobile application, incorporates critical variables encompassing plantation areas, variable and fixed costs, total costs, yields, selling prices, income, profitability or loss, and breakeven points. The assessment of acceptance across three dimensions included content, technical and physical attributes, and perceived ease of use, that the farmers consistently demonstrated the highest level of acceptance for the mobile application. In terms of satisfaction assessment, encompassing design, content, performance, and utility, the findings uniformly indicated that farmers expressed substantial satisfaction with the rice production database accessible via the mobile application. Farmers’ feedback underscored the application’s user-friendliness and its potential for aiding production planning in subsequent seasons. Moreover, the facilitating the adoption of innovative platforms, and policymakers can empower farmers with tools to enhance productivity and induce satisfaction and confidence in modern agricultural practices.
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Cost-return and technical efficiency of rice production in the Ban Nong Saeng Rice Mill Community Enterprise, Chachoengsao Province, Thailand
(2024-05-01)
Kerdsriserm, C.
;
Suwanmaneepong, Suneeporn
The research findings showed that to attain a break-even point, farmers needed to consider strategies to augment yield by approximately 70 kilograms per rai. The evaluation of technical efficiency revealed a varied range of levels amongst farmers, spanning from 0.28 to 0.99, with an average of 0.32. These values indicated that farmers were only partially harnessing the potential of their production factors and the opportunity to enhance their overall production efficiency. In conclusion, the study advanced to understand rice production economics within the context of community enterprises. The insights gained from the analyses contributed to discussions surrounding optimal resource allocation, enhancing production efficiency, and identifying strategic interventions to improve the profitability and sustainability of rice production.
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Recent important insight into nutraceuticals potential of pigmented rice cultivars: A promising ingredient for future food
(2024-01-01)
Loan, Le Thi Kim
;
Vinh, Bui The
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Tai, Ngo Van
Many phytochemicals and nutraceuticals have historically been known to have positive effects on health, especially in ancient and modern health systems. Due to the presence of color, rice, a common basic meal, has anti-inflammatory, anti-cancer, and nutritional effects. It has been shown that polyphenols in rice extracts can alter important signaling pathways involved in cancer. It is also commonly used for its nutritional benefits and to promote general health. We cover the phytochemicals and potential health benefits of colored rice in this brief review. This article discusses the relatively limited in vivo research that has been done to date to formally establish the nutritional potential of rice. Importantly, the available literature supports and promotes the use of colored rice as an anti-diabetic agent, source of prebiotics, and cancer-preventing agent. To methodically evaluate the clinical efficacy and potential of colored rice, future research must focus on properly planned clinical trials in cancer and diabetes patients. Further scientific research on rice extract alone or colored rice flour as a nutritional food and/or functional food could pave the way for new ways to explore the health benefits of rice from experiment to the clinic to prevent disease.
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Insight into the nutritional, physicochemical, functional, antioxidative properties and in vitro gastrointestinal digestibility of selected Thai rice: Comparative and multivariate studies
(2024-01-01)
Van Ngo, Tai
;
Kunyanee, Kannika
;
Luangsakul, Naphatrapi
Nutritional, physicochemical, functional, antioxidative and digestion properties of brown and white rice flours from four Thai rice varieties (Luangpatue, upland rice, RD43, and Hommali) were investigated and compared. Due to differences in grain color, the color parameters of flours varied significantly. Protein, fat, ash, carbohydrate, and moisture content, total dietary fiber, and calories of these rice flours were 6.94–10.21%, 1.68–3.16%. 0.554–1.442%, 71.20–79.68%, 9.79–10.53%, 1.07–3.64%, and 350.82–362.73 kcal/100g, respectively. RD43 brown rice (18.4%) and Luangpatue white rice (26.5%) respectively exhibited the lowest and highest amylose content. Luangpatue rice flours also showed higher swelling power, setback value, final viscosity, and thermal properties than other varieties. The variations in hydration properties and oil absorption index were noticeable among these rice flours. In addition, the highest level of total phenolic content and antioxidant activity led to the lowest estimated glycemic index (eGI = 62.92) found in upland brown rice. It was confirmed by the multivariate analysis results. This study reported the diverse physicochemical properties and composition-property relationships of two kinds of flours from four rice varieties collected from Thailand for the first time. It exhibited possible capabilities for the development of various rice-based products that promote health based on their characteristics on industrial scale.
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Multivariable analysis of physicochemical and functional characterization of four Thai pigmented rice varieties
(2023-11-01)
Tai, N. V.
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Kunyanee, K.
;
Luangsakul, N.
Four Thai pigmented rice varieties as know as colored rice — two sources of Manpo red rice [Manpo A (Ounjai company), Manpo B (Thongmanee comapny)], Hommali (red), and Riceberry (purple) were investigated. Result showed the moisture, protein, fat, ash, carbohydrate, and amylose contents of the four types of varieties ranged from 8.62-10.39%, 7.88-9.05%, 1.87-2.90%, 1.67-1.78%, 76.32-79.52%, and 14.17-26.67%, respectively. Abundant fat and protein contents were found in Manpo A, while Manpo B had the highest amylose content. Riceberry and Manpo A varieties were found to have low amylose content. Therefore, the functional properties of the rice varieties were also different. Among the different varieties, Riceberry possessed low swelling power, OAI, and pasting properties; it also exhibited high levels of solubility, WAI, and antioxidant properties. Pearson’s correlation illustrated the relationships among the properties of the rice varieties, which revealed that antioxidant compounds could prohibit the gelatinization process. PCA and HCA separated the cultivars into two groups and showed that Riceberry demonstrated significant differences in characteristics from other varieties, which confirmed that the high content of antioxidants could remarkably lower the value of pasting parameters of rice paste. Finally, this study found that colored rice varieties have a high level of antioxidants, which indicates their potential use as nutraceutical foods. The unique characteristics of colored rice warrants further research to facilitate their utilization in appropriate food products to enhance health benefits.
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Social capital and production risk: examining the association using the case of irrigated rice farms in Northern Thailand
(2023-05-01)
Llones, C.
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Suwanmaneepong, S.
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Mankeb, P.
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Wongtragoon, U.
Results showed that higher perceived social capital in terms of interpersonal trust and network relationships are negatively associated with variability in production. The observed association can be attributed to the social capital capacity for resource generation and networking, which help mitigate potential risks. The study provided evidence of the importance of developing and strengthening the social capital of farming communities in supporting farmers’ risk management. Especially among farmers with less access to information, the farmer’s network facilitated the knowledge-sharing on farming innovations and improved practices.
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Drying modelling of amylose fatty acid complex formation for reducing rapidly available glucose of geographical indication rice during high-temperature fluidisation
(2022-04-01)
Junka, Nittaya
;
Rattanamechaiskul, Chaiwat
This study analysed changes in the available glucose of geographical indication rice, Sang Yod variety, from Thailand after drying through the fluidisation technique in the temperature range of 85–115 °C. When the rice with an initial moisture content of 33.3% dry basis was dried at temperature over 85 °C, starch gelatinisation occurred. As the starch underwent gelatinisation, the orderly structure of the starch granules was partially disrupted. Thus, amylose leached out of the granules and simultaneously formed fatty acids in the rice. This created amylose fatty acid complexes (AFCs). This change was detected from the A and V type crystallinity patterns of the starch and complexes using X-ray diffractometry. When drying the rice at 115 °C, the formation of AFCs resulted in rapidly available glucose of dehulled rice decreasing from a medium-high level to a medium-low level; the slowly available glucose value also increased. The drying modelling was developed based on experimental data to explain the observed changes. The developed mathematical model could predict changes in A type crystallinity with the R<sup>2</sup> value and average of relative root mean square error of 0.9855 and 6.34%, while those of the V type changes were 0.9879 and 4.64%, respectively. This data can explain the mechanism underlying the available glucose response observed during drying.
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Nanofibers derived from endophytic Chaetomium brasilense for growth stimulation of rice
(2022-03-01)
Song, J. J.
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Soytong, K.
;
Thianrat, L.
Chaetomiumn brasilense PT302 was endophytically isolated from rice var Supanburi 1 and Prathumthani 80 which firstly selected for investigation to promote the growth of rice. It is morphologically and molecular phylogenetic confirmation through ITS1 and ITS4 as Ch.brasilense PT302 compared to Achaetomium strumarium (JX863914) as out group. Crude metabolites (crude hexane, crude ethyl acetate and crude methanol) at 50 ppm from Ch. brasiliense were proved to promote seed germination of rice var. Supanburi 1 and Pathumtani 80 at 7 days which found significantly higher seed germination than the non-treated control. Nanofibers constructed Ch. brasiliense promoted significantly higher seed germination, plant height and number of tillers than the non-treated control in rice var Supanburi 1 and Prathumthani 80 in 7 days at low concentration of 5 ppm planted in Chachengsao and Bangkok soil series. Nanofibers derived from endophytic Ch. brasilense is actively promoted plant growth at lower concentration than crude metabolites. It is firstly reported the natural product nanofiber constructed from endophytic Ch. brasilense to stimulate plant growth.

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