scholarly journals Optimized Prediction of Reducing Sugars and Dry Matter of Potato Frying by FT-NIR Spectroscopy on Peeled Tubers

Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 967 ◽  
Author(s):  
Cédric Camps ◽  
Zo-Norosoa Camps

Dry matter content (DMC) and reducing sugars (glucose, fructose) contents of three potato varieties for frying (Innovator, Lady Claire, and Markies) were determined by applying Fourier-transform near-infrared spectrometry (FT-NIR), with paying particular attention to tubers preparation (unpeeled, peeled, and transversally cut tubers) before spectral acquisitions. Potatoes were subjected to normal storage temperature as it is processed in the industry (8 °C) and lower temperature inducing sugar accumulations (5 °C) for 195 and 48 days, respectively. Prediction of DMC has been successfully modeled for all varieties. A common model to the three varieties reached R2, root mean square error (RMSEP), and ratio performance to deviation (RPD) values of 0.84, 1.2, and 2.49. Prediction accuracy of reducing sugars was variety dependent. Reducing sugars were accurately predicted for Innovator (R2 = 0.84, RMSEP = 0.097, and RPD = 2.86) and Markies (R2 = 0.78, RMSEP = 0.033, and RPD = 2.15) and slightly less accurate for Lady Claire (R2 = 0.63, RMSEP = 0.036, and RPD = 1.64). The lack of accuracy obtained with the Lady Claire variety is mainly due to the tight variability in sugar content measured over the storage. Finally, the best preparation of the tuber from the point of view of the accuracy of the prediction models was to use the whole peeled potato. Such preparation allowed for the improvement in RPD values by 15% to 38% the RPD values depending on reducing sugars and 35% for DMC.

2017 ◽  
pp. 3-12
Author(s):  
Audrey Pissard ◽  
Vincent Baeten ◽  
Pierre Dardenne ◽  
Pascal Dupont ◽  
Marc Lateur

Description of the subject. The article deals with the use of near-infrared spectroscopy (NIR) on fresh apples to determine the phenolic compounds and dry matter content in peel and flesh powders. Objectives. The aim is the rapid and non-destructive determination of these nutritional parameters. Method. Two hundred twenty-nine fruits from 20 varieties were analyzed with NIR spectroscopy and reference methods. Results. Great variability of total phenolic compounds (TPC) in peel and flesh powders was observed among varieties. The dry matter (DM) content also differed greatly between peel and flesh. Calibration and validation models showed high coefficients of determination for the TPC content, which were slightly higher for the peel than for the flesh (R² val = 0.91 and 0.84 respectively). For the DM content, high coefficients of determination and ratios of prediction to deviation (RPDs) were also observed (R² val = 0.94, RPD = 4.8 and R² val = 0.94, RPD = 4.9 for the peel and flesh respectively). Conclusions. Calibration and validation models allow quantitative predictions to be made for TPC and DM content. They confirm the potential of NIRS for predicting the polyphenol content and highlight its potential for determining the DM content, a parameter often neglected in research into apple quality.


1994 ◽  
Vol 2 (4) ◽  
pp. 213-221 ◽  
Author(s):  
T. Lovász ◽  
P. Merész ◽  
A. Salgó

The acceptability of near infrared (NIR) transmission spectroscopy for the prediction of six quality factors of apples (firmness, refractive index, pH, titratable acid, dry matter and alcohol insoluble solids content) was investigated. The effects of storage conditions, cultivars and season on the accuracy of the NIR transmission method were also studied during the experiment. The accuracy of the calibration of all investigated parameters decreased during storage. The alteration of the characteristics of the spectra is possibly due to changes in the chemical composition and structure of apples between September and April. The calibration method was improved by developing a separate calibration for each cultivar per year. The calibrations of the different parameters are season-dependent except for the dry matter content. Using outlier diagnostics, the prediction accuracy can be generally improved by about 10%. The coefficient of variation for each parameter is compatible with the relative standard deviation for the reference methods except for the titratable acid content, showing the applicability of NIR transmission techniques. A relationship seems to exist between the maturity and the NIR transmission spectra of the apple.


2012 ◽  
Vol 1 (4) ◽  
pp. 55 ◽  
Author(s):  
Trygve Helgerud ◽  
Vegard H. Segtnan ◽  
Jens P. Wold ◽  
Simon Ballance ◽  
Svein H. Knutsen ◽  
...  

<p>The dry matter is one of the main quality parameters of raw and processed potatoes. In the present study, the potential of utilizing high throughput commercially available NIR interactance systems for dry matter determination in whole unpeeled potato tubers is investigated. The performance of a 2D NIR interactance instrument was compared with that of a 1D NIR interactance instrument and a traditional underwater weight apparatus. A total of 114 tubers were assessed individually with both of the NIR instruments (760-1040 nm), the underwater weight and an external reference method (freeze drying). The 1D interactance instrument obtained better prediction results than what the 2D instrument could achieve (R<sup>2</sup>=0.95, RMSECV=0.91, and R<sup>2</sup>=0.83, RMSECV=1.65, respectively). The underwater weight obtained the highest explained variance (R<sup>2</sup>=0.97), but the estimation was biased by approximately 1.5% (by weight). The poorer prediction performance of the 2D NIR interactance system can be partly explained by the lower penetration depths of the light compared to the 1D NIR interactance systems.</p>


2018 ◽  
Vol 42 (6) ◽  
pp. e13644 ◽  
Author(s):  
João Paixão dos Santos Neto ◽  
Gustavo Walace Pacheco Leite ◽  
Gabriele da Silva Oliveira ◽  
Luís Carlos Cunha Júnior ◽  
Priscila Lupino Gratão ◽  
...  

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1916
Author(s):  
Iwona Ledwożyw-Smoleń ◽  
Sylwester Smoleń ◽  
Stanisław Rożek ◽  
Włodzimierz Sady ◽  
Piotr Strzetelski

Despite wide prevention programmes, iodine deficiency remains a substantial problem in various populations around the world. Consumption of crop plants with increased iodine content may help supply additional amounts of that element in a daily diet. The aim of the work was to evaluate the efficiency of iodine biofortification of potato tubers. Soil application of KI and foliar application of KIO3 in doses up to 2.0 kg I ha−1 were tested in a three-year field experiment. Biomass, yield as well as dry matter, iodine, starch, and soluble sugar content in potato tubers were analyzed. No negative effect of tested methods of iodine application on potato yield or dry matter content was observed. Both soil and foliar application of iodine allowed to obtain potato tubers with increased content of that element with no decrease of starch or sugar content. The highest efficiency of iodine biofortification was noted for foliar spraying with KIO3 in a dose of 2.0 kg I ha−1. The obtained level of iodine in 100 g of potatoes could be sufficient to cover up to 25% of Recommended Daily Allowance for that element. The findings of the study indicate that potatoes biofortified with iodine can become an additional source of I in a daily diet.


PLoS ONE ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. e0188918 ◽  
Author(s):  
Ugochukwu N. Ikeogu ◽  
Fabrice Davrieux ◽  
Dominique Dufour ◽  
Hernan Ceballos ◽  
Chiedozie N. Egesi ◽  
...  

Author(s):  
O.R. Davletbaeva ◽  
M.G. Ibragimbekov ◽  
A.N. Khovrin

Представлена оценка сохранности сортов, гибридов и новых гибридных комбинаций лука репчатого выращенного в однолетней культуре в условиях Московской области. Лежкость селекционных образцов лука оценивали в период зимнего хранения, учитывали убыль массы, число усохших, пораженных и проросших луковиц. По количеству сохранившихся луковиц и динамике этих показателей оценивали сохранность образцов. Сохранность лука репчатого зависит еще от пригодности данного сорта или гибрида к длительному хранению и его вызревания. Полное вызревание лука характеризуется наличием сухих кроющих чешуй, усыханием листьев и шейки, высоким содержанием сахарозы и моносахаров. Такой лук хранится дольше и меньше поражается болезнями. Один из важных способов сокращения потерь лука репчатого при хранении является соблюдение низкотемпературного режима и соответствующей влажности воздуха. Для лучшей сохранности лука поддерживали температуру в хранилище около 12 С, относительной влажностью воздуха в пределах 75-80. Для этого лук закладывали в хранилище с оборудованными холодильными установками, автоматически регулирующими температуру, влажность и циркуляцию воздуха. Большинство образцов имели сохранность от 28,3 до 71,1, что составило более половины 69,2 изучаемых образцов. Самый низкий показатель сохранности имел образец 652/17 F1 (ШетAN 158 I3) и составил 28,3, также данный образец имел 42,3 проросших луковиц. Лучшую сохранность 95 и 94,6 показали образцы зарубежной селекции F1 Сантеро и F1 Премито (стандарт), при содержании сухого вещества 10,9 и 10,8 соответственно. Также хорошую сохранность среди гибридных комбинаций показал образец 652/2 F1 (Шет Поло I3) 85 с содержанием сухого вещества 10,2, уступив отечественному сорту Форвард (стандарт) на 1,8.An assessment of the safety of cultivars, hybrids and new hybrid combinations of onion grown in an annual culture in the Moscow region is presented. The yield of selected onion samples was evaluated during winter storage, taking into account the loss of weight, the number of dried, affected and sprouted bulbs. The number of preserved bulbs and the dynamics of these indicators were used to assess the safety of samples. The safety of onions depends on the suitability of this variety or hybrid for long-term storage and its aging. Full maturation of onions is characterized by the presence of dry covering scales, drying of leaves and neck, high content of sucrose and monosaccharides. This onion is stored longer and less affected by diseases. One of the important ways to reduce the loss of onions during storage is to observe a low-temperature regime and appropriate humidity. For better preservation of onions, the storage temperature was maintained at about 1-2 C, with a relative humidity of 75-80. To do this, the onion was placed in a storage with equipped refrigeration units that automatically regulate temperature, humidity and air circulation. The majority of samples had a safety of 28.3 to 71.1, which was more than half-69.2 of the studied samples. The lowest preservation rate was for the 652/17 F1 sample (ShetAN 158 I3) and was 28.3, and this sample also had 42.3 sprouted bulbs. The best preservation of 95 and 94.6 were shown by samples of foreign selection F1 Santero and F1 Premito (standard), with a dry matter content of 10.9 and 10.8, respectively. Also, the 652/2 F1 (Shet Polo I3) sample showed good preservation among hybrid combinations 85 with a dry matter content of 10.2, losing to the domestic Forvard (standard) cultivar by 1.8.


2015 ◽  
Vol 4 (1) ◽  
pp. 303-309
Author(s):  
Elsie Hamadina

This study was conducted to determine the changes in dry matter (DM), free sugar (FS) and starch contents in the three yam (D. rotundata) tuber regions under two storage environmental conditions (natural light- yam barn, or and darkness). Three varieties of D. rotundata (alaako, Dodoro and Odo) were studied. The dry matter content of the Head region was the highest (28.6%), followed by the Middle (26.9%) and Tail (22.3%) regions. Change in dry matter content of the tuber is mainly due to rapid changes in the dry matter content of the Tail region over time. Storage environment significantly (P< 0.05) affected dry matter content of the three tuber regions at 8 and 16 weeks in storage (WIS). Head regions per variety were lower in dry matter when stored under Light than in the Dark at 8 WIS, while the reverse was the case for the Tail. This may relate to the release of endodormancy. By 16 WIS, when tubers stored under Light had well developed sprouts and those stored in the Dark only showed the first sign of sprouting, all Head regions had higher dry matter content under Light than in Dark storage. This may be due to the presence of sprouts. Storage environment did not significantly affect starch content at the various tuber regions. Head regions had higher percentage free sugar content under Light than Dark storage, and these effects were manifested between 8 and 16 WIS.


2005 ◽  
Vol 13 (2) ◽  
pp. 99-107 ◽  
Author(s):  
W. Saeys ◽  
J. Xing ◽  
J. De Baerdemaeker ◽  
H. Ramon

In this study, the reflectance and transflectance sample presentation mode were compared for the analysis of the nutrient content of hog ( Sus domesticus) manure using visible and near infrared (vis-NIR) spectroscopy. A total of 194 hog manures, which were collected in the spring of 2004 from farms in the northern part of Belgium, were assayed by conventional wet chemical analysis and spectroscopy for the following constituents: dry matter content (DM), organic matter content (OM), pH, total Kjeldahl nitrogen (Ntot), ammonium nitrogen (NH4-N), phosphorus (P), potash (K), calcium (Ca), sodium (Na) and magnesium (Mg). Samples were scanned with a Foss NIRSystems Model 6500 scanning monochromator in reflectance and transflectance mode, respectively. A ceramic reference was measured in between the two modes. The monochromator was equipped with a DCFA sample presentation unit and ranges from 400 to 2498 nm. Partial least squares regression was employed to relate the spectral information to the nutrient content. The PLS models were calibrated for both sample presentation modes using leave-one-out cross-validation. The results of this study showed that the transflectance mode performed better than the reflectance mode. From the transflectance measurements, very good quantitative predictions for total N, good quantitative predictions for K, DM and OM, approximate predictions for NH4-N, P and Mg, very approximate predictions for Ca and a discrimination between high and low values for Na were obtained. pH was not predictable. The reflectance measurements were able to provide good quantitative predictions for total N and K, approximate quantitative predictions for NH4-N, very approximate predictions for DM, OM, P and Mg and discrimination between high and low values for Ca. Na was even less predictable and pH might be unpredictable.


2006 ◽  
Vol 125 (6) ◽  
pp. 591-595 ◽  
Author(s):  
J. M. Montes ◽  
H. F. Utz ◽  
W. Schipprack ◽  
B. Kusterer ◽  
J. Muminovic ◽  
...  

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