The Impact of Fiber from Buckwheat Hulls Waste on the Pasting, Rheological and Textural Properties of Normal and Waxy Potato Starch Gels

The aim of this study was to investigate the impact of fiber from buckwheat hull waste (BH) on the pasting, rheological, and textural properties of 4% and 5% (w/w) pastes and gels based on the potato starches with different amylose/amylopectin contents. The starch and starch/fiber mixtures were characterized by pasting and flow measurements as well as by viscoelastic and textural analysis. The pasting properties showed a greater BH effect (0.2%) on the gelatinization of PS than WPS. The starch gels and starch fiber mixtures showed biopolymer gel behavior. In the WPS/BH pastes, a smaller increase in hardness was noted compared to PS/BH.

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DMA Study of the Molecular Structure of Porcine Fat in-Water Emulsions Stabilised by Potato Starch

International Journal of Molecular Sciences ◽

10.3390/ijms22147276 ◽

2021 ◽

Vol 22 (14) ◽

pp. 7276

Author(s):

Ryszard Rezler

Keyword(s):

Molecular Structure ◽

Conformational Changes ◽

Potato Starch ◽

Textural Properties ◽

Instrumental Analysis ◽

Rheological Parameters ◽

Water Type ◽

Dynamic Mechanical ◽

Fat Emulsions ◽

Starch Gels

The aim of the study was to determine how the molecular structure of porcine fat-in-water type emulsions stabilised with potato starch affected their rheomechanical properties. Dynamic mechanical analysis (DMA) and instrumental analysis of the texture were the method used in experiments. Starch gels with concentrations corresponding to the water starch concentration of the examined emulsions were used as control systems. The analysis of the starch and starch–fat systems showed that the values characterising their rheomechanical and textural properties reflected the spatial reaction of the amylose matrix to dynamic mechanical interactions. Changes in their values resulted from conformational changes in the structure of segments and nodes of the lattice, conditioned by the concentration of starch and the presence of fat. As a result of these changes, starch–fat emulsions are distinguished by greater densities of network segments and nearly two times greater functionalities of nodes than starch gels. The instrumental analysis of the texture showed that the values of the texture parameters in the starch gels were greater than in the starch–fat emulsions. The high values of the correlation coefficients (R~0.9) between the texture determinants and the rheological parameters proved that there was a strong correlation between the textural properties of the tested systems and their rheomechanical properties.

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The Effect of the Addition of Dietary Fibers from Apple and Oat on the Rheological and Textural Properties of Waxy Potato Starch

Polymers ◽

10.3390/polym12020321 ◽

2020 ◽

Vol 12 (2) ◽

pp. 321

Author(s):

Greta Adamczyk ◽

Magdalena Krystyjan ◽

Grażyna Jaworska

Keyword(s):

Fiber Type ◽

Potato Starch ◽

Hysteresis Loops ◽

Textural Properties ◽

Pasting Properties ◽

Dietary Fibers ◽

Flow Curves ◽

Starch Concentration ◽

Pasting Characteristics ◽

Textural Parameters

The aim of this paper was to investigate the influence of dietary fibers from oat (OF) and apple (AF) (concentration 0.2%) on the pasting properties, rheological (including thixotropic and anti-thixotropic) and textural properties of 3% and 4% (w/w) waxy potato starch pastes. The samples were characterized by their pasting characteristics, the hysteresis loop test, and textural properties measured during storage. It was found that the breakdown viscosity values of the blends, including oat fibers, were lower than those of the others (waxy potato starch (WPS), WPS-AF), which suggests that these samples would have higher resistance to retrogradation and therefore would form a more stable paste. The pattern of flow curves showed that the investigated waxy potato starch and starch-fiber pastes were non-Newtonian fluids, thinned by shear. Areas of the hysteresis loops indicated that pastes with fibers had anti-thixotropic or mixed thixotropic/anti-thixotropic character. The greatest areas of the anti-thixotropy hysteresis loops were characteristic for WPS, while its mixtures with AF and OF caused a decrease in the value of these areas. It can indicate that starch-fiber blends were more stable during shearing. Fiber-type and starch concentration strongly affected the textural parameters of the starch-fiber gels.

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Properties of High-Swelling Native Starch Treated by Heat–Moisture Treatment with Different Holding Times and Iterations

Molecules ◽

10.3390/molecules25235528 ◽

2020 ◽

Vol 25 (23) ◽

pp. 5528

Author(s):

Chia-Long Lin ◽

Jheng-Hua Lin ◽

Jia-Jing Lin ◽

Yung-Ho Chang

Keyword(s):

Potato Starch ◽

Pasting Properties ◽

Degree Of Polymerization ◽

Viscosity Change ◽

Tapioca Starch ◽

Heat Moisture Treatment ◽

Moisture Treatment ◽

Effect of dry heat, microwave and ultrasonic treatments on physicochemical properties of potato starch with or without pectin

Tropical Journal of Pharmaceutical Research ◽

10.4314/tjpr.v18i7.1 ◽

2021 ◽

Vol 18 (7) ◽

pp. 1365-1373

Author(s):

Haiyan Gao ◽

Kexin Meng ◽

Jie Zeng ◽

Jikai Jiang ◽

Jinxiang Zhao ◽

...

Keyword(s):

Physicochemical Properties ◽

Potato Starch ◽

Microwave Treatment ◽

Pasting Properties ◽

Texture Profile ◽

Dry Heat ◽

Starch Gel ◽

Starch Gels ◽

Dry Heat Treatment ◽

Starch Paste

Purpose: To investigate the effects of dry heat, microwave and ultrasonic treatments on the physicochemical properties of potato starch alone or blended with pectin. Methods: The physicochemical properties of potato starch gels prepared using microwave, ultrasonic and dry heat treatments were assessed. Pasting properties, gel strength, thermal properties and crystal texture of the potato starch were determined using Rapid Visco analyzer, texture profile analyzer, differential scanning calorimeter and x-ray diffractometer. Results: Dry heat and ultrasonic treatments significantly increased the peak viscosity of the potato starch, and significantly decreased its setback and pasting temperatures (p < 0.05). Dry heat treatment significantly increased the hardness, while dry heat and ultrasonic treatments significantly improved retrogradation of the potato starch (p < 0.05). Transparency of potato starch paste was significantly increased by the different treatments, except microwave treatment (p < 0.05). Potato starch gels blended with pectin and subjected to any of the treatments exhibited significantly increased hardness, when compared with raw potato starch (p < 0.05). The retrogradation of the potato starch was significantly improved by the different treatments. Dry heat and ultrasonic treatments significantly decreased the syneresis of potato starch with or without pectin (p < 0.05). The three treatments also significantly affected the gelatinization enthalpy of the potato starch with or without pectin, and exerted some effects on the crystallinity of the gels. Conclusion: The results obtained in this study suggest that differences in physicochemical properties of potato starch gels are due mainly to the degree of damage to starch granules caused by different treatments. The addition of pectin to potato starch gel greatly improves its hardness and retrogradation.

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Method development for the determination of textural properties of sugar beet roots

Sugar Industry ◽

10.36961/si23306 ◽

2019 ◽

pp. 392-400 ◽

Cited By ~ 2

Author(s):

Gunnar Kleuker ◽

Christa M. Hoffmann

Keyword(s):

Sugar Beet ◽

Compression Test ◽

Storage Period ◽

Textural Properties ◽

Small Sample ◽

Root Tip ◽

Flexural Test ◽

Sample Distribution ◽

The Impact

The harvest of sugar beet leads to root tip breakage and surface damage through mechanical impacts, which increase storage losses. For the determination of textural properties of sugar beet roots with a texture analyzer a reliable method description is missing. This study aimed to evaluate the impact of washing, soil tare, storage period from washing until measurement, sample distribution and number of roots on puncture and compression measurements. For this purpose, in 2017 comprehensive tests were conducted with sugar beet roots grown in a greenhouse. In a second step these tests were carried out with different Beta varieties from a field trial, and in addition, a flexural test was included. Results show that the storage period after washing and the sample distribution had an influence on the puncture and compression strength. It is suggested to wash the roots by hand before the measurement and to determine the strength no later than 48 h after washing. For reliable and comparable results a radial distribution of measurement points around the widest circumference of the root is recommended for the puncture test. The sample position of the compression test had an influence on the compressive strength and therefore, needs to be clearly defined. For the puncture and the compression test it was possible to achieve stable results with a small sample size, but with increasing heterogeneity of the plant stand a higher number of roots is required. The flexural test showed a high variability and is, therefore, not recommended for the analysis of sugar beet textural properties.

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The Effect of Fat Content and Fatty Acids Composition on Color and Textural Properties of Butter

Molecules ◽

10.3390/molecules26154565 ◽

2021 ◽

Vol 26 (15) ◽

pp. 4565

Author(s):

Sergiu Pădureţ

Keyword(s):

Fatty Acids ◽

Principal Component ◽

Textural Properties ◽

Fat Content ◽

Fatty Acids Composition ◽

Color Parameter ◽

Butter Fat ◽

Composition Variation ◽

Texture Parameters ◽

The Impact

The textural properties of butter are influenced by its fat content and implicitly by the fatty acids composition. The impact of butter’s chemical composition variation was studied in accordance with texture and color properties. From 37 fatty acids examined, only 18 were quantified in the analyzed butter fat samples, and approximately 69.120% were saturated, 25.482% were monounsaturated, and 5.301% were polyunsaturated. The butter samples’ viscosity ranged between 0.24 and 2.12 N, while the adhesiveness ranged between 0.286 to 18.19 N·mm. The principal component analysis (PCA) separated the butter samples based on texture parameters, fatty acids concentration, and fat content, which were in contrast with water content. Of the measured color parameters, the yellowness b* color parameter is a relevant indicator that differentiated the analyzed sample into seven statistical groups; the ANOVA statistics highlighted this difference at a level of p < 0.001.

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231 Impact of Brachyspira hyodysentariae on intestinal function and integrity

Journal of Animal Science ◽

10.1093/jas/skaa054.198 ◽

2020 ◽

Vol 98 (Supplement_3) ◽

pp. 116-116

Author(s):

Emma T Helm ◽

Susanne J Lin ◽

Nicholas Gabler ◽

Eric R Burrough

Keyword(s):

Ex Vivo ◽

Potato Starch ◽

Nutrient Digestibility ◽

High Morbidity ◽

Post Inoculation ◽

Intestinal Function ◽

Treatment Groups ◽

Intestinal Integrity ◽

Beet Pulp ◽

The Impact

Abstract Swine dysentery (SD) induced by Brachyspira hyodysentariae (Bhyo) causes colitis and mucohemorrhagic diarrhea in grow-finish pigs, however little is known about the physiological changes that occur to the gastrointestinal tract during Bhyo infection. Thus, the objective of this study was to evaluate the impact of a Bhyo challenge on intestinal function and integrity of pigs fed two divergent diets. A total of 36 Bhyo negative gilts (24.3 ± 3.6 kg BW) were selected and assigned to one of three treatment groups (n=12 pigs/trt): 1) Bhyo negative, 20% DDGS diet (CON), 2) Bhyo challenged, 20% DDGS diet (DDGS), and 3) Bhyo challenged, 10% DDGS, 5% beet pulp and 5% resistant potato starch diet (RS). Pigs were fed diets 21 days prior to challenge and on days post inoculation (dpi) 0 and 1, pigs were inoculated with Bhyo or sham. Fecal samples were collected for ATTD and pigs were euthanized for colon collection within 72 hours of initial observation of clinical SD, or at the end of the study (dpi 10-16). Tissues were assessed for ex vivo measures of intestinal integrity and mitochondrial function. The challenge resulted in high morbidity, with 88% of DDGS and RS pigs developing clinical SD. Colon transepithelial resistance was increased in DDGS pigs compared with CON and RS pigs (P=0.005), and colon macromolecule permeability was reduced in both DDGS and RS pigs compared with CON pigs (P=0.006), likely due to mucoid discharge. Colonic mitochondrial oxygen consumption was not impacted by treatment (P >0.10). Further, ATTD of DM, OM, N, and GE were reduced in DDGS pigs compared with CON pigs (P< 0.001), whilst nutrient digestibility was not reduced in RS pigs. Taken together, these data show Bhyo does not appear to reduce ex vivo colonic integrity. Further, the RS diet may reduce severity of a Bhyo challenge.

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Physicochemical, morphological, functional, and pasting properties of potato starch as a function of extraction methods

Journal of Food Measurement & Characterization ◽

10.1007/s11694-021-00862-5 ◽

2021 ◽

Author(s):

Neeraj ◽

Saleem Siddiqui ◽

Nidhi Dalal ◽

Anuradha Srivastva ◽

Ashok Kumar Pathera

Keyword(s):

Potato Starch ◽

Extraction Methods ◽

Pasting Properties

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Understanding change in hydrometeorological extremes with statistical models - the importance of model parametrization

10.5194/egusphere-egu21-1071 ◽

2021 ◽

Author(s):

Ilaria Prosdocimi ◽

Thomas Kjeldsen

Keyword(s):

Coefficient Of Variation ◽

Constant Coefficient ◽

River Flow ◽

Extreme Value ◽

Flow Measurements ◽

Scaling Properties ◽

Distribution Parameters ◽

Quantile Estimates ◽

Constant Coefficient Of Variation ◽

The Impact

<p>The potential for changes in hydrometeorological extremes is routinely investigated by fitting change-permitting extreme value models to long-term observations, allowing one or more distribution parameters to change as a function of time or some physically-motivated covariate. In most practical extreme value analyses, the main quantity of interest though is the upper quantiles of the distribution, rather than the parameters' values. This study focuses on the changes in quantile estimates under different change-permitting models. First, metrics which measure the impact of changes in parameters on changes in quantiles are introduced. The mathematical structure of these change metrics is investigated for several models based on the Generalised Extreme Value (GEV) distribution. It is shown that for the most commonly used models, the predicted changes in the quantiles are a non-intuitive function of the distribution parameters, leading to results which are difficult to interpret. Next, it is posited that commonly used change-permitting GEV models do not preserve a constant coefficient of variation, a property that is typically assumed to hold and that is related to the scaling properties of extremes. To address these shortcomings a new (parsimonious) model is proposed: the model assumes a constant coefficient of variation, allowing the location and scale parameters to change simultaneously. The proposed model results in more interpretable changes in the quantile function. The consequences of the different modelling choices on quantile estimates are exemplified using a dataset of extreme peak river flow measurements.</p>

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Technical note on measuring run-off dynamics from pavements using a new device: the weighable tipping bucket

Hydrology and Earth System Sciences ◽

10.5194/hess-15-1379-2011 ◽

2011 ◽

Vol 15 (5) ◽

pp. 1379-1386 ◽

Cited By ~ 9

Author(s):

T. Nehls ◽

Y. Nam Rim ◽

G. Wessolek

Keyword(s):

High Resolution ◽

Data Processing ◽

Temporal Resolution ◽

Hydrological Process ◽

Flow Measurements ◽

New Device ◽

Run Off ◽

Low Volume ◽

Rain Events ◽

The Impact

Abstract. Due to climate change, cities need to adapt to changing rainfall and rainwater run-off dynamics. In order to develop an corresponding process based run-off model for pavements, we had to improve the measurement technique to detect run-off dynamics in an appropriate high resolution. Traditional tipping buckets (TB) have a comparable low volume resolution, capable to quantify the highest intensities in a range of expected flows. This results in varying temporal resolutions for varying flow intensities, especially in low resolutions for small flow events. Therefore, their applicability for run-off measurements and other hydrological process studies is limited, especially when the dynamics of both small and big flow events shall be measured. We improved a TB by coupling it to a balance and called it weighable tipping bucket (WTB). This paper introduces the device set up and the according data processing concept. The improved volume and temporal resolution of the WTB are demonstrated. A systematic uncertainty of TB measurements compared to WTB measurements is calculated. The impact of that increased resolution on our understanding of run-off dynamics from paved urban soils are discussed, exemplary for the run-off and the surface storage of a paved urban soil. The study was conducted on a permeably paved lysimeter situated in Berlin, Germany. Referring to the paved surface, the TB has a resolution of 0.1 mm, while the WTB has a resolution of 0.001 mm. The temporal resolution of the WTB is 3 s, the TB detects individual tippings with 0.4 s between them. Therefore, the data processing concept combines both the benefits of the balance to measure small intensities with that of the TB to measure high flow intensities. During a five months period (July to November 2009) 154 rain events were detected. Accordingly, the TB and WTB detected 47 and 121 run-off events. The total run-off was 79.6 mm measured by the WTB which was 11 % higher than detected by the TB. 95 % of that difference can be appointed to water, which evaporated from the TB. To derive a surface storage estimation, we analyzed the WTB and TB data for rain events without run-off. According to WTB data, the surface storage of the permeable pavement is 1.7 mm, while using TB data leads to an overestimation of 47 % due to low volume resolution of the TB. Combining traditional TB with modern, fast, high resolution digital balances offers the opportunity to upgrade existing TB systems in order to improve their volume detection limit and their temporal resolution, which is of great advantage for the synchronization of water balance component measurements and the investigation of hydrological processes. Furthermore, we are able to quantify the uncertainty of flow measurements gained with traditional tipping buckets.

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