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Degree of maturity and dry-heat processing affect visual quality and volatile profile of roasted immature rice grains. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Chen Y, Stieger M, Capuano E, Forde CG, van der Haar S, Ummels M, van den Bosch H, de Wijk R. Influence of oral processing behaviour and bolus properties of brown rice and chickpeas on in vitro starch digestion and postprandial glycaemic response. Eur J Nutr 2022; 61:3961-3974. [PMID: 35773354 PMCID: PMC9596526 DOI: 10.1007/s00394-022-02935-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 06/07/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE Oral processing behaviour may contribute to individual differences in glycaemic response to foods, especially in plant tissue where chewing behaviour can modulate release of starch from the cellular matrix. The aim of this study was to assess the impact of chewing time of two starch based foods (brown rice and chickpeas) on bolus properties, in vitro starch digestion and postprandial glycaemic excursion in healthy subjects. METHODS In a cross-over trial participants (n = 26) consumed two carbohydrates-identical test meals (brown rice: 233 g; chickpeas: 323 g) with either long (brown rice: 41 s/bite; chickpeas: 37 s/bite) or short (brown rice: 23 s/bite; chickpeas: 20 s/bite) chewing time in duplicate while glycaemic responses were monitored using a continuous glucose monitoring device. Expectorated boli were collected, then bolus properties (number, mean area, saliva amylase activity) and in vitro starch digestion were determined. RESULTS Longer chewing resulted in significantly (p < 0.05) more and smaller bolus particles, higher bolus saliva uptake and higher in vitro degree of intestinal starch hydrolysis (DH_Schewing time%) than shorter chewing for both foods (brown rice: DH_S%23 s = 84 ± 4% and DH_%S41s = 90 ± 6%; chickpeas: DH_S%20 s = 27 ± 3% and DH_%S37s = 34 ± 5%, p < 0.001). No significant effect of chewing time on glycaemic response (iAUC) (p > 0.05) was found for both meals. Brown rice showed significantly and considerably higher in vitro degree of intestinal starch hydrolysis and glycaemic response (iAUC) than chickpeas regardless of chewing time. No significant correlations were observed between bolus properties and in vitro starch hydrolysis or glycaemic response (p > 0.05). CONCLUSION Differences in the innate structure of starch based foods (brown rice compared to chickpeas) have a larger effect on postprandial glucose response than differences in mastication behaviour although oral processing behaviour showed consistent effects on bolus properties and in vitro starch digestion. Trial registration ClinicalTrials.gov identifier: NCT04648397 (First posted: December 1, 2020).
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Affiliation(s)
- Yao Chen
- Food Quality and Design, Wageningen University & Research, Wageningen, The Netherlands.
| | - Markus Stieger
- Division of Human Nutrition and Health, Sensory Science and Eating Behaviour, Wageningen University & Research, Wageningen, The Netherlands
| | - Edoardo Capuano
- Food Quality and Design, Wageningen University & Research, Wageningen, The Netherlands
| | - Ciarán G Forde
- Division of Human Nutrition and Health, Sensory Science and Eating Behaviour, Wageningen University & Research, Wageningen, The Netherlands
| | - Sandra van der Haar
- Food & Biobased Research, Fresh Food Chains, Food, Health & Consumer Research, Wageningen University & Research, Wageningen, The Netherlands
| | - Meeke Ummels
- Food & Biobased Research, Fresh Food Chains, Food, Health & Consumer Research, Wageningen University & Research, Wageningen, The Netherlands
| | - Heleen van den Bosch
- Food & Biobased Research, Fresh Food Chains, Food, Health & Consumer Research, Wageningen University & Research, Wageningen, The Netherlands
| | - Rene de Wijk
- Food & Biobased Research, Fresh Food Chains, Food, Health & Consumer Research, Wageningen University & Research, Wageningen, The Netherlands
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Pham A, García Martínez JB, Brynych V, Stormbjorne R, Pearce JM, Denkenberger DC. Nutrition in Abrupt Sunlight Reduction Scenarios: Envisioning Feasible Balanced Diets on Resilient Foods. Nutrients 2022; 14:nu14030492. [PMID: 35276851 PMCID: PMC8839908 DOI: 10.3390/nu14030492] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/17/2022] [Accepted: 01/19/2022] [Indexed: 02/04/2023] Open
Abstract
Abrupt sunlight reduction scenarios (ASRS) following catastrophic events, such as a nuclear war, a large volcanic eruption or an asteroid strike, could prompt global agricultural collapse. There are low-cost foods that could be made available in an ASRS: resilient foods. Nutritionally adequate combinations of these resilient foods are investigated for different stages of a scenario with an effective response, based on existing technology. While macro- and micronutrient requirements were overall met, some—potentially chronic—deficiencies were identified (e.g., vitamins D, E and K). Resilient sources of micronutrients for mitigating these and other potential deficiencies are presented. The results of this analysis suggest that no life-threatening micronutrient deficiencies or excesses would necessarily be present given preparation to deploy resilient foods and an effective response. Careful preparedness and planning—such as stock management and resilient food production ramp-up—is indispensable for an effective response that not only allows for fulfilling people’s energy requirements, but also prevents severe malnutrition.
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Affiliation(s)
- Alix Pham
- Alliance to Feed the Earth in Disasters (ALLFED), Fairbanks, AK 99775, USA; (J.B.G.M.); (V.B.); (R.S.); (J.M.P.); (D.C.D.)
- Correspondence:
| | - Juan B. García Martínez
- Alliance to Feed the Earth in Disasters (ALLFED), Fairbanks, AK 99775, USA; (J.B.G.M.); (V.B.); (R.S.); (J.M.P.); (D.C.D.)
| | - Vojtech Brynych
- Alliance to Feed the Earth in Disasters (ALLFED), Fairbanks, AK 99775, USA; (J.B.G.M.); (V.B.); (R.S.); (J.M.P.); (D.C.D.)
| | - Ratheka Stormbjorne
- Alliance to Feed the Earth in Disasters (ALLFED), Fairbanks, AK 99775, USA; (J.B.G.M.); (V.B.); (R.S.); (J.M.P.); (D.C.D.)
| | - Joshua M. Pearce
- Alliance to Feed the Earth in Disasters (ALLFED), Fairbanks, AK 99775, USA; (J.B.G.M.); (V.B.); (R.S.); (J.M.P.); (D.C.D.)
- Department of Electrical & Computer Engineering, Western University, London, ON N6A 5B9, Canada
| | - David C. Denkenberger
- Alliance to Feed the Earth in Disasters (ALLFED), Fairbanks, AK 99775, USA; (J.B.G.M.); (V.B.); (R.S.); (J.M.P.); (D.C.D.)
- Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
- Alaska Center for Energy and Power, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
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Nutritional Quality of the Most Consumed Varieties of Raw and Cooked Rice in Spain Submitted to an In Vitro Digestion Model. Foods 2021; 10:foods10112584. [PMID: 34828863 PMCID: PMC8618410 DOI: 10.3390/foods10112584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 12/25/2022] Open
Abstract
Rice is one of the most consumed staple foods around the world and its trade is highly globalized. Increased environmental pollution generates a large amount of waste that, in many cases, is discarded close to culture fields. Some species are able to bioaccumulate toxic substances, such as metals, that could be transferred to the food chain. The main goal of this study was to evaluate the content of metallic (Al, Cd, Pb, and Cr) and metalloid elements (As) in 14 of the most consumed varieties of rice in Spain and their effects on human health. The samples were cooked, and human digestion was simulated by using a standard in vitro digestion method. Metallic and metalloid element levels were analysed by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), previous called microwave digestion. Both the human health risk index, Hazard Quotient, and Lifetime Cancer Risk did not show toxic values in any case. Rice with a higher non-digestible fraction showed a higher liberation of proteins and a lower glycemic index. There were no significant differences in the concentrations of metallic and metalloid elements in cooked rice or in the digestible fraction in all varieties analysed. However, Al concentrations were higher than other metals in all varieties studied due to its global distribution. No relationship has been observed between the digestibility of rice and the bioaccessibility of each metallic and metalloid element. All of the studied rice varieties are healthy food products and its daily consumption is safe. The regular monitoring of metals and As in rice consumed in Spain may contribute to improvements in the human health risk evaluation.
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Miraji KF, Linnemann AR, Fogliano V, Laswai HS, Capuano E. Dry-heat processing at different conditions impact the nutritional composition and in vitro starch and protein digestibility of immature rice-based products. Food Funct 2021; 12:7527-7545. [PMID: 34227637 DOI: 10.1039/d1fo01240a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Immature grain represents a precious nutritional source in many rural Africa areas. To optimize processing of immature rice into pepeta (a traditional rice-flakes produced from immature rice grains), immature rice (TXD306 variety) harvested at 18 and 26 days after 50% heading were processed in the laboratory under different soaking (0 and 12 h) and roasting temperature (80, 100 and 120 °C) regimes. Riboflavin, nicotinic acid, nicotinamide and iron concentration increased with severity of roasting temperature, while thiamine has an opposite trend. Heating promoted the transformation of insoluble into soluble dietary fiber, increased lipid digestibility decreasing protein one, which showed the highest value when rice was roasted at 100 °C. Soaking before roasting significantly increased moisture and iron content while slightly increased riboflavin, nicotinic acid and nicotinamide when compared to unsoaked products. Among roasted products, starch digestibility increased with roasting temperature. Microstructure analysis indicated a complete loss of cell wall integrity in cooked rice, determining a complete starch and protein digestion while this is delayed in raw rice and roasted products. We concluded that roasting at 100 °C is the optimum temperature to produce pepeta of the highest protein digestibility and low starch digestibility. Soaking before roasting at 120 °C is best when retaining micronutrients is considered.
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Affiliation(s)
- Kulwa F Miraji
- Tanzania Agricultural Research Institute, Ifakara Centre, Ifakara, Tanzania
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Tamura M, Yoshimura Y, Saito T, Koyama T. Comparison of standard and non-standard buckwheat groats for cooking, physicochemical and nutritional properties, and in vitro starch digestibility. FUTURE FOODS 2021. [DOI: 10.1016/j.fufo.2021.100029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Miraji KF, Capuano E, Fogliano V, Laswai HS, Linnemann AR. Utilization of Pepeta, a locally processed immature rice-based food product, to promote food security in Tanzania. PLoS One 2021; 16:e0247870. [PMID: 33657180 PMCID: PMC7928465 DOI: 10.1371/journal.pone.0247870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 02/16/2021] [Indexed: 11/18/2022] Open
Abstract
Consumption of pepeta, a traditionally processed immature rice product, is common in Tanzania, where it contributes to food security as an early rice food i.e. when there is no other food available at the household while the crops in the field not yet fully ripe. Many production steps are needed to guarantee a consistent, good quality pepeta product, and this hinders its utilization in other rice-growing sub-Saharan regions. This study aims to gain insight into the pepeta processing knowledge and final product, and assess variations in the processing conditions and parameters across the study area. A survey among 257 Tanzanian processors and consumers revealed that the pepeta product is widely known, rated second (73.5% respondents) as rice-based food after wali (cooked white rice, (100%)) and linked to traditions of the communities in the study area. Harvest of immature rice grain, roasting, pounding, cleaning, and packing are the main process steps of pepeta production. Method of rice harvest, rice suitability for pepeta production after optimum harvest, dryness of grains and number of pounding as indicator to terminate roasting and pounding process respectively, and packaging materials used varied significantly across respondents in the study area. Reported criteria considered by respondents for product acceptability did not vary significantly across study area. The criteria include colour (76.5%), general appearance (60.8%), texture (64.7%) and taste (52.9%). Immature rice paddy and pepeta were sold at a higher price than mature rice paddy and white rice, respectively, which implies that options to facilitate pepeta processing through, for instance, standardization of processing conditions and parameters could lead to increased income.
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Affiliation(s)
- Kulwa F. Miraji
- Tanzania Agricultural Research Institute, Ifakara Centre, Ifakara, Tanzania
- Food Quality and Design, Wageningen University and Research, Wageningen, The Netherlands
| | - Edoardo Capuano
- Food Quality and Design, Wageningen University and Research, Wageningen, The Netherlands
| | - Vincenzo Fogliano
- Food Quality and Design, Wageningen University and Research, Wageningen, The Netherlands
| | | | - Anita R. Linnemann
- Food Quality and Design, Wageningen University and Research, Wageningen, The Netherlands
- * E-mail:
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