Comparison of structural, functional and in vitro digestion properties of bread incorporated with grapefruit peel soluble dietary fibers prepared by three microwave-assisted modifications

2020 ◽  
Vol 11 (7) ◽  
pp. 6458-6466
Author(s):  
Jiapan Gan ◽  
Guanyi Peng ◽  
Shuai Liu ◽  
Xiaobo Hu ◽  
Xuanting Wang ◽  
...  

In our previous study, three kinds of grapefruit peel soluble dietary fibers (SDF) were prepared by microwave-sodium hydroxide treatment (MST-SDF), microwave-enzymatic treatment (MET-SDF) and microwave-ultrasonic treatment (MUT-SDF).


1981 ◽  
Vol 64 (5) ◽  
pp. 792-797 ◽  
Author(s):  
Abraham W. Ghebriel ◽  
D. Wayne Kellogg ◽  
D.D. Miller


1975 ◽  
Vol 21 (3) ◽  
pp. 313-322 ◽  
Author(s):  
M. C. N. Jayasuriya ◽  
Emyr Owen

SUMMARY1. Four experiments have been carried out to determine the effect of treatment of spring-sown barley straw (var. Deba Abed) with sodium hydroxide (NaOH) solution and subsequent neutralization with hydrochloric acid (HCl) on its digestibility and intake by sheep.2. In Experiment 1, chopped straw was mixed with 4·5 or 9·0 g NaOH in 200 or 800 ml water/100 g, straw, and after 24 hr neutralized with HCl and left for a further 24 hr before being offered to castrated male sheep (wethers) in a maintenance diet containing 35% concentrates. Organic-matter digestibility of straw significantly increased, by 8 and 11 percentage units respectively, after treatment with 200 ml solution containing 4·5 and 9·0 g NaOH. Volume of solution did not affect digestibility.3. In Experiment 2, straw treated as in Experiment 1 was given ad libitum. The highest intake was for straw treated with 200 ml solution containing 4·5 g NaOH/100 g straw, treatment with 9·0 g NaOH giving a significantly lower intake but higher than that of untreated straw.4. In Experiment 3, the in vitro digestibility of milled straw, treated as in Experiments 1 and 4, increased with increasing volumes of solution up to 120 ml/100 g straw, but the response to successive increments of NaOH declined progressively.5. In Experiment 4 chopped straw was mixed with 4·5, 6·75 or 9·0 g NaOH in 30, 60 or 120 ml water/100 g straw and offered as in Experiment 1. Treatments significantly increased straw digestibility, by 8 to 16 percentage units. Increasing the volume of water from 30 to 60 ml significantly improved digestibility, by 5 percentage units at the two lower levels of NaOH. The response to an increase in the level of NaOH was less, and inconsistent. In vitro and in vivo digestibilities were significantly correlated, but it is concluded that the in vitro technique used overestimates the digestibility of treated straw.



2021 ◽  
Vol 352 ◽  
pp. 129398
Author(s):  
Shuai Jiang ◽  
Di Zhao ◽  
Yingqun Nian ◽  
Juqing Wu ◽  
Miao Zhang ◽  
...  


1980 ◽  
Vol 31 (1) ◽  
pp. 27-33 ◽  
Author(s):  
D. Levy ◽  
Z. Holzer ◽  
Y. Folman

ABSTRACTThe fibrous roughages, wheat straw (WS) and cotton stalks (CS), were left untreated or treated with 30 g sodium hydroxide per kg, and residual alkali was either neutralized with sulphuric acid or left unneutralized. All roughages were pelleted and used either in complete feeds or separately. The effects of these treatments on the nutritive value of the roughages were examined in digestibility trials in vitro and in vivo, and in a 7·month feeding trial of a factorial arrangement of 2 × 3 × 2, in which the roughages constituted 350 g/kg of the diets. Approximately 150 g/kg of the neutral-detergent fibre (cell wall) constituents of both roughages was solubilized by sodium hydroxide treatment, while the changes in acid-detergent fibre components (cellulose and lignin) were much smaller, although evident.In vitro-dry matter digestibility of wheat straw was 22 % higher than that of cotton stalks, and its increase due to NaOH treatment was 50% and 30% for wheat straw and cotton stalks, respectively. In vivo digestibility of organic matter of wheat straw was increased from 0·47 to 0·59, and that of cotton stalks from 032 to 037. The increase was evident in all components except protein, in which digestibility was reduced. The increase in the metabolizable energy values of wheat straw from 6·86 to 7·45MJ/kg dry matter and that of cotton stalks from 4·77 to 5·10MJ/kg dry matter following sodium hydroxide treatment was not reflected in daily live-weight or carcass-weight gain in the feeding trial. The animals offered NaOH-treated roughages had significantly more fat trim, and more fat in the large depots. Including roughages in complete feeds revealed no advantage in metabolizable energy conversion into live weight.



2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Joel P. Rivadeneira ◽  
Tao Wu ◽  
Quincy Ybanez ◽  
Adeliza A. Dorado ◽  
Veronica P. Migo ◽  
...  

One way to valorize “Saba” banana peel waste is to extract high-value compounds, such as pectin, and use it for food applications. In this study, the parameters for the microwave-assisted extraction of pectin were screened and optimized using Response Surface Methodology. The pectin was purified and then subjected to characterization. Results showed that the optimum extraction conditions were 195°C, 8% solid-liquid ratio, and pH 3 hydrochloric acid (HCl), with predicted and actual yields of 12.8% and 14.2%, respectively. The subsequent purification method increased the purity of pectin by 300%. The pectin was found to be low-methoxy in nature and had an average particle size of 300 nm. The pectin application in whey protein isolate resulted in a shear-thinning fluid, with an improved viscosity compared to a control. When applied to a commercial orange juice, the in vitro digestion study showed that the fluid’s viscosity was higher before and during the gastric and intestinal digestion at the low physiological shear rate.





1996 ◽  
Vol 1996 ◽  
pp. 233-233
Author(s):  
X.B. Chen ◽  
J.Q. Wang ◽  
W.J. Shand ◽  
E.R. Ãrskov

One approach for effective use of dietary protein in ruminant feeding is to protect it from microbial degradation in the rumen. There has been that sodium hydroxide treatment reduces the degradation of soybean meal (SBM) protein in the rumen. This experiment was to investigate the effects of treating SBM with different concentrations and quantities of NaOH on the microbial fermentation and enzymatic digestion of the treated SBM.



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