scholarly journals Effect of processing methods on functional, pasting properties of flours and sensory evaluation of “Amala” made from different yam cultivars

2021 ◽  
Vol 7 (1) ◽  
pp. 123-132
Author(s):  
Babalola John Olarenwaju ◽  
Olakunle Esther Jesufemi ◽  
Elutilo Oluwashola Oyedunni ◽  
Adeoti Olatunde Micheal ◽  
Adesina David Ademola
Keyword(s):  
Water Absorption ◽  
Sensory Evaluation ◽  
Pasting Properties ◽  
Absorption Capacity ◽  
Clean Water ◽  
Water Absorption Capacity ◽  
Local Clay ◽  
Processing Methods ◽  
Overall Acceptability ◽  
Yam Flour

The effect of processing methods on the functional, pasting properties of flours and sensory evaluation of “amala” made from three different cultivars of yam were determined using standard analytical methods. The three cultivars of yam namely; Dioscorea caynensis “Amula and Lasinrin) and Dioscorea alata (Cote divoire) were processed using three different methods as following; (a) parboiling with steep water (omi-ogi) in aluminium pot and local clay pot (b) parboiling with clean water in aluminium pot and local clay pot (c) heating steep water omi -ogi and clean water separately at 60°C and blanching sliced yam with it in plastic bucket. The functional and sensory properties of the yam flour obtained from the three processing methods were determined using standard analytical method. Data collected were analyzed statistically to determine the Analysis of Variance (ANOVA) and the means. There were significant differences (P<0.05) in the result obtained. The bulk density, water absorption capacity, wettability, oil absorption capacity and swelling index of the yam flour ranged from 0.33±0.01 to 0.49±0.03g/ml, 7.50±0.44 to 0.50±0.44g/ml, 36.67±11.55 to 178.33±2.89secs, 1.47±0.23 to 7.40±1.06g/ml and 1.10±0.01 to 1.82±0.03g/g respectively. The peak viscosity, trough, breakdown, final viscosity, setback, peak time and pasting temperature of yam flour ranged from 1783.00±7.07 to 3682.00±2.83 cP, 1691.00±4.24 to 3533.50±3.54cP, 27.50±2.12 to 195.00±7.07cP, 2351.00±1.41 to 4332.50±3.54cP, 420.00±7.07 to 799.00±1.41cP, 7.03±0.04 to 5.10±0.14cP, 81.35±0.92 to 89.10±0.14cP respectively. The appearance, colour, taste, texture and overall acceptability of the “amala” ranged from 3.70±1.08 to 8.65±0.75, 3.70±1.03 to 8.60±0.82, 3.50±1.19 to 8.20±1.01, 3.35±1.04 to 8.50±0.95 and 3.35±0.75 to 8.60±0.75 respectively. The LLPSW (cultivar “Lasinrin” processed with local clay pot and steep water “omi-ogi”) had the highest water absorption capacity, LAPOW (cultivar “Amula” processed with aluminium pot and clean water) had the best overall acceptability. Water absorption capacity measures the extent of water retention in yam flour. It can be concluded that yam flour processed with LCPSW was the best flour from the above results on water absorption capacity.

The effect of sugar beet fiber addition on the chemical properties of tortilla chips

2012 ◽  
pp. 385-388 ◽  
Author(s):  
Azadeh Saadatmandi ◽  
Mohammad Elahi ◽  
Reza Farhoosh ◽  
Mahdi Karimi
Keyword(s):  
Sugar Beet ◽  
Water Absorption ◽  
Protein Content ◽  
Chemical Properties ◽  
Absorption Capacity ◽  
Ash Content ◽  
Oil Absorption ◽  
Water Absorption Capacity ◽  
Overall Acceptability ◽  
Tortilla Chips

The incorporation of sugar beet fiber (0–5%) to tortilla chips and the effects on the chemical and sensory properties were studied. Addition of sugar beet fiber (SBF) led to an increasing of water absorption capacity, ash content and darkness while lowering the protein content and oil absorption. Sensory evaluation showed that the overall acceptability of tortilla chips reduces if adding more than 2% SBF.

scholarly journals Physico-Functional and Starch Pasting Properties of Cassava (Manihot Esculenta Cruntz) Flours as Influenced by Processing Technique and Varietal Variations

2021 ◽  
Vol 9 (2) ◽  
Author(s):  
E. O. Afoakwa ◽  
Gilbert O. Sampson ◽  
D. Nyirenda ◽  
C. N. Mwansa ◽  
L. Brimer ◽  
...  
Keyword(s):  
Water Absorption ◽  
Manihot Esculenta ◽  
Processing Technique ◽  
Pasting Properties ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Manihot Esculenta Crantz ◽  
Swelling Power ◽  
Volatile Acidity ◽  
Pasting Characteristics

This study investigated effects of processing technique and varietal variations on the physico-functional, starch pasting and viscoelastic properties of cassava (Manihot Esculenta Crantz) flours using a 3x6 factorial experimental approach. Samples were evaluated for their non-volatile acidity, pH, swelling power, solubility water absorption capacity (27oC and 70oC), colour and starch pasting characteristics of the cassava flours using standard methods. Grating and soaking of the cassava tubers significantly (p<0.05) reduced the pH of all the varieties with concomitant increases in non-volatile acidity. Grating and soaking significantly (p<0.05) reduced the swelling power, solubility and water absorption capacity of the flours. Soaked Chila B flour recorded the highest pasting temperature of 66.9°C whiles soaked Mweulu flour recorded the highest peak viscosity (684 BU), viscosity at 95oC (683 BU) and viscosity at 95oC-hold (359 BU), suggesting that the flours from the different cassava varieties could be targeted for different food and industrial products.   Cassava (Manihot esculenta Crantz) is an important root crop in the world and it provides food for about one billion people globally. It contributes significantly to the economy of most tropical countries through processing into various products. Varietal variation in cassava plays a very important role in the production of diversified food products due to its inherent biochemical characteristics such as starch content, sugar content and pasting characteristics. The biochemical composition in the tubers varies according to varieties. Physico-functional and starch pasting properties of cassava are among the most important parameters used to predict the suitability of flours and starches for certain end product uses, and these would aid the selection of appropriate varieties for use in various food and industrial applications.

scholarly journals Pasting Properties of Composite Flour Made from Sorghum, Millet and African Yam Bean

2021 ◽  
pp. 23-35
Author(s):  
J. N. Okafor ◽  
J. N. Ishiwu ◽  
J. E. Obiegbuna
Keyword(s):  
Water Absorption ◽  
Bulk Density ◽  
Pasting Properties ◽  
Absorption Capacity ◽  
Composite Flour ◽  
Water Absorption Capacity ◽  
African Yam Bean ◽  
Composite Flours ◽  
Gelation Concentration ◽  
Flour Blends

The aim of this research was to produce acceptable ‘fufu’ from a mixture of sorghum, millet, and African yam bean flours that will have a moderate carbohydrate and protein content with most optimized texture. The functional and sensory properties of flour blends produced from Sorghum, Millet and African yam bean was studied. Sorghum, Millet and African yam bean were processed into flour and mixed at different ratios to obtain composite flours. The flour formulations obtained were analyzed for water absorption capacity, bulk density, least gelation concentration , and viscosity .The  water absorption capacity ranged from 1.00 to 3.00,  the bulk density ranged from 0.56 to 0.82;the least gelation concentration ranged from 5.77 to 6.87,while the viscosity ranged from 0.956 to 9.30.Also proximate composition of the individual flours before formulation  was analyzed, it ranged from 6.13 to 8.46 moisture, 2.00 to 4.67 ash, 0.17 to 8.00 fiber,5.47 to 8.61 fat, 7.57 to 21.84 protein, 58.34 to 69.27 carbohydrate.The sensory values ranged from 5.60 to 6.45 for taste; 4.25 to 6.85  for colour; 5.15 to 6.80 for texture; 3.85 to 5.70 for aroma; 5.45 to 6.45 acceptability. Sample 10 (with the ratio of 40:70:20) had the highest rating for general acceptability. It was observed that sample 1(with the ratio of 60:50:60) had the lowest rating in taste and aroma. The mixture components that could produce optimum texture was determined through optimization plot. This work has demonstrated that acceptable ‘fufu’ with moderate protein and carbohydrate could be successfully produced using composite flours of sorghum, millet and African yam bean.

scholarly journals Physico-Chemical Properties of Biscuits Enriched with Dried Microwave-Blanched Fruit Peelings

2021 ◽  
pp. 1-11
Author(s):  
Feumba Dibanda Romelle ◽  
Panyoo Akdowa Emmanuel ◽  
Tiencheu Bernard ◽  
Aswhini Rani ◽  
Mbofung Carl Moses
Keyword(s):  
Water Absorption ◽  
Wheat Flour ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Chemical Properties ◽  
Pasting Properties ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Physico Chemical ◽  
Apple Peels

Aims: To investigate the dough rheological properties as well as physical, nutritional, antioxidant and sensory properties of biscuits supplemented   with dried microwave-blanched orange, apple and pomegranate peels at various levels (0-10%, wheat flour substitution). Methodology: Water absorption capacity and pasting properties of wheat flour blended with   fruit   peels   were   assessed   using   farinograph   and   micro   viscoamylograph. Physico-chemical properties as well as antioxidant activities were measured using standard methods. The sensory analysis was performed by trained panelists. Results: Water absorption capacity of the dough increased significantly with increasing levels of orange and apple peels while it decreased with pomegranate peels. However, peak,  hot  paste,  cold  paste  and  breakdown  viscosities  of  the  dough  significantly decreased with increasing proportions of apple and orange peels while they increased with pomegranate peels. The breaking force and weight of the biscuits supplemented with pomegranate peels were the lowest.  Supplementation of biscuits with fruit peelings enhanced the ash and fibre content of the biscuits but had no significant effect on their antioxidant activities except for biscuits containing 10% apple peels which had higher antioxidant activity compared to biscuit controls. Biscuits supplemented with 5% of fruit peels were the most appreciated in terms of surface character, crumb colour and texture. Conclusion:  This study showed that dried microwave-blanched apple peels can be incorporated into biscuits to enhance both their nutritional and antioxidant properties.

scholarly journals Physicochemical Properties of Native and Heat Moisture Treated Starches of White and Red Cocoyam (Colocasia esculenta) Varieties

2021 ◽  
Vol 9 (6) ◽  
pp. 1195-1200
Author(s):  
Olukayode Adediran Okunade ◽  
Olanrewaju Arinola
Keyword(s):  
Physicochemical Properties ◽  
Water Absorption ◽  
Bulk Density ◽  
Pasting Properties ◽  
Absorption Capacity ◽  
Moisture Level ◽  
Oil Absorption ◽  
Water Absorption Capacity ◽  
Heat Moisture Treatment ◽  
Moisture Treatment

White and red cocoyam starches were physically modified by heat moisture treatment at 16, 24 and 32 % moisture levels. The functional and pasting properties of the modified and native starches were evaluated using standard methods. The swelling power at 60oC, water absorption capacity, oil absorption capacity, least gelation concentration, packed bulk density and loose bulk density of heat moisture treated white and red cocoyam starches ranged between 1.90 - 2.18 and 1.89 – 2.21; 1.00 – 1.80 ml/g and 0.80 – 1.60 ml/g; 1.40 – 1.80 ml/g and 1.20 – 1.40 ml/g; 8.00 – 10.00% and 8.00 – 10.00%; 0.51 – 0.62 g/ml and 0.54 – 0.64 g/ml; 0.41 – 0.51 g/ml and 0.43 – 0.53 g/ml respectively. For both white and red cocoyam starches, heat moisture treated starches at 16% moisture content level had the highest swelling power in the temperature range 60oC to 90oC; also starches treated at 32% moisture level had the highest water absorption capacity, oil absorption capacity, packed bulk density and loose bulk density. Red cocoyam native starch had higher peak, trough, breakdown, final and setback viscosity than white cocoyam starch. Heat moisture treatment generally increased the pasting properties of white cocoyam starch. The modification of red cocoyam starch at moisture levels of 16% and 24% reduced the pasting properties, however at higher moisture level, the pasting properties increased. These results suggest that moisture level of cocoyam starches influence their physicochemical properties during heat moisture modification; this will increase the array of food products in which the starches can be used.

scholarly journals Technological and Sensory Properties of Baby Purees Formulated with Andean Grains and Dried with Different Methods

Proceedings ◽  
2020 ◽  
Vol 53 (1) ◽  
pp. 13
Author(s):  
María Dolores Jiménez ◽  
Manuel Oscar Lobo ◽  
Norma Cristina Sammán
Keyword(s):  
Particle Size ◽  
Water Absorption ◽  
Sensory Evaluation ◽  
Absorption Capacity ◽  
Drying Methods ◽  
Water Absorption Capacity ◽  
Dry Powders ◽  
Texture Profile ◽  
Particle Size And Morphology ◽  
Size And Morphology

The aim of this work was to compare different cooking–drying methods to obtain dehydrated baby purees. Flours of quinoa and amaranth (native and germinated) were used to formulate them. Dry powders (DPs) were obtained by lyophilization (LD), convection (CD), and extrusion (ED). Proximal composition, particle size and morphology, water absorption capacity, and solubility were evaluated in DPs. Color, texture profile (TP), and sensory characteristics were determined in fresh pure and rehydrated powders (RPs). The LD particles were smaller and homogeneous; CD showed collapsed particles, and ED presented agglomerated particles. Different drying methods influenced the rehydration properties of DPs, as well as the color, TP, and sensory evaluation of RPs. The best method to obtain dehydrated baby purees was extrusion.

scholarly journals Water Absorption Capacity Determines the Functionality of Vital Gluten Related to Specific Bread Volume

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 228
Author(s):  
Marina Schopf ◽  
Katharina Anne Scherf
Keyword(s):  
Water Absorption ◽  
Water Content ◽  
Wheat Flour ◽  
Specific Volume ◽  
Disulfide Bonds ◽  
Protein Composition ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Water Addition ◽  
Wheat Flours

Vital gluten is often used in baking to supplement weak wheat flours and improve their baking quality. Even with the same recipe, variable final bread volumes are common, because the functionality differs between vital gluten samples also from the same manufacturer. To understand why, the protein composition of ten vital gluten samples was investigated as well as their performance in a microbaking test depending on the water content in the dough. The gluten content and composition as well the content of free thiols and disulfide bonds of the samples were similar and not related to the specific bread volumes obtained using two dough systems, one based on a baking mixture and one based on a weak wheat flour. Variations of water addition showed that an optimal specific volume of 1.74–2.38 mL/g (baking mixture) and 4.25–5.49 mL/g (weak wheat flour) was reached for each vital gluten sample depending on its specific water absorption capacity.

Comparison of Bio and Eco-technologies with Chemical Methods for Pre-treatment of Flax Fibers: Impact on Fiber Properties

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Sabela Camano ◽  
Nemeshwaree Behary ◽  
Philippe Vroman ◽  
Christine Campagne
Keyword(s):  
Water Absorption ◽  
Fiber Bundle ◽  
Glass Fibers ◽  
Fiber Surface ◽  
Pectate Lyase ◽  
High Water ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Flax Fibers ◽  
The Impact

Flax fibers, available as fiber bundles, are commonly used as fiber reinforcement in composite materials as a substitute for glass fibers. Pre-treatments are often necessary for improving fiber-resin adhesion, and also to facilitate fiber elementarization, and to improve fiber ability to be implemented in mechanical processes limiting fiber damages. This paper focuses on the impact of biotechnologies (effect of 2 different enzymes: a pectate lyase and a laccase) and of an ecotechnology (ultrasound with ethanol), compared to classical chemical pre-treatments (using aqueous NaOH and ammonia) on the final flax fiber bundle properties, before and after a carding process. Fiber surface properties (wettability and/or zeta potential values), fiber elementarization and mechanical properties vary with the type of treatment (chemical nature of product and conditions used). Fibers elementarised using pectate lyase and ultrasound/ethanol have a hydrophilic surface and a high water absorption capacity, and are also of highest quality in terms of increased fineness. Treatment with NaOH yields the poorest fiber bundle tenacity. Laccase enzyme yields long thick hydrophobic fibers having very low water absorption capacity, and the most neutral surface charge. Properties of flax fibers can be easily monitored using different pre-treatments resulting in fibers which would be suited for various final applications.

scholarly journals Experimental study on water level and absorption capacity in a radial well flow in a loess area

2018 ◽  
Vol 19 (5) ◽  
pp. 1313-1321
Author(s):  
Xuezhen Zhang ◽  
Aidi Huo ◽  
Jucui Wang
Keyword(s):  
Unsteady Flow ◽  
Water Absorption ◽  
Water Level ◽  
Steady Flow ◽  
Flow Injection ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Analysis Method ◽  
Semi Empirical ◽  
Radial Well

Abstract In this paper, the theoretical basis for flow calculation in an injection well was discussed. It proposed that the flow rate of an injection well could be calculated referring to pumping theory and method. A mathematical model of the rising curve of water level around a radial well was established and the equation for calculating the rising curve was given. The calculation equations selected for the water absorption capacity of injection wells were explained and examples were verified and compared. The results indicated that, under the same injection conditions, the water level value calculated by the analysis method was slightly larger, but the error between the analysis method and the semi-theoretical and semi-empirical methods was small. In the processes of steady flow injection and unsteady flow injection, there was a small difference of water absorption capacity, and the former was slightly larger. The measured values of water absorption capacity were only about one-third of the calculated values based on pumping theory. Overall, the analytical solution method for predicting the rising curve of water level has priority in well injection. The semi-theoretical and semi-empirical equation for calculating water absorption capacity sifted first has priority in steady flow injection, the equation sifted second has priority in unsteady flow injection.

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