The Distribution and Pasting Properties of Starches in Fresh Sweet Potato (Ipomoea batatas Lam.) Tuber

2011 ◽  
Vol 396-398 ◽  
pp. 1672-1675
Author(s):  
Yu Zhong Shi ◽  
Feng He Tian ◽  
Jun He Zhang ◽  
Bao Bao Zhang ◽  
Wei Na Jin ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Amylose Content ◽  
Pasting Properties ◽  
Middle Part ◽  
Potato Tubers ◽  
Middle Section ◽  
Different Parts ◽  
Extractable Content

This study focused on the distribution and pasting properties of starches in sweet potato (Ipomoea batatas L.) tuber. A fresh sweet potato tuber was cut into six equivalent parts. The extractable contents and pasting properties of starches from different parts of fresh sweet potato tuber were determined. The results showed that the extractable content of starches from the Middle section of sweet potato tuber is lower than that from the head and the end section of sweet potato tuber. The extractable content of starches from the inner-end part and the outer-Middle part of sweet potato tuber are 16.2% and 10.3% respectively. The amylose content of starches is relatively higher in the Middle section and outer layer of sweet potato tuber. The amylose content of starches from the outer-Middle part and the inner-end part of sweet potato tuber are 29.5% and 26.7% respectively. Pasting properties of starches from different parts of sweet potato tubers are different from each other. Among them, the starches from inner-end part of sweet potato tuber have the highest viscosities and a lower breakdown.

scholarly journals Biochemistry of postharvest spoilage of sweet potato (Ipomoea batatas L.). 2. Comparison of cellulolytic enzyme production in cultures and fungi-infected sweet potato tubers

2006 ◽  
pp. 48-57
Author(s):  
R. C. Ray
Keyword(s):  
Sweet Potato ◽  
Enzyme Production ◽  
Ipomoea Batatas ◽  
Rhizopus Oryzae ◽  
Cellulose Synthesis ◽  
Cellulolytic Enzyme ◽  
Optimum Temperature ◽  
Potato Tubers

The study was conducted to determine the production in vitro and in vivo of cellulases by Botrydiplodia theobromae and Rhizopus oryzae. Isolates of these organisms were obtained from the postharvest decay of sweetpotato tubers. Results revealed that B. theobrornae and R. oryzae which were isolated from postharvest spoilage of sweetpotato tubers produced endo-13-1,4-glucanase and exo-V-1 ,4-glucanase in culture and in fungi-infected tissues of sweetpotato tubers. The optimum temperature and pH for cellulose synthesis and activity were 30°C and pH 6.5, respectively.

scholarly journals The Effect of Germinated Sorghum Extract on the Pasting Properties and Swelling Power of Different Annealed Starches

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1602
Author(s):  
Hesham Alqah ◽  
M. S. Alamri ◽  
A. A. Mohamed ◽  
S. Hussain ◽  
A. A. Qasem ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Amylose Content ◽  
Potato Starch ◽  
Amorphous Region ◽  
Enzymatic Digestion ◽  
Pasting Properties ◽  
Wheat Starch ◽  
Predictive Tool ◽  
Swelling Power ◽  
Wheat Starches

Starches were extracted from chickpea (C.P.), corn (C.S.), Turkish bean (T.B.), sweet potato (S.P.S.), and wheat starches (W.S.). These starches exhibited different amylose contents. The extracted starches were annealed in excess water and in germinated sorghum extract (GSE) (1.0 g starch/9 mL water). The α-amylase concentration in the GSE was 5.0 mg/10 mL. Annealing was done at 40, 50, and 60 °C for 30 or 60 min. The pasting properties of annealed starches were studied using Rapid Visco-Analyzer (RVA), in addition to the swelling power. These starches exhibited diverse pasting properties as evidenced by increased peak viscosity with annealing, where native starches exhibited peak viscosity as: 2828, 2438, 1943, 2250, and 4601 cP for the C.P., C.S., T.B., W.S., and S.P.S., respectively, which increased to 3580, 2482, 2504, 2514, and 4787 cP, respectively. High amylose content did not play a major role on the pasting properties of the tested starches because sweet potato starch (S.P.S.) (22.4% amylose) exhibited the highest viscosity, whereas wheat starch (W.S.) (25% amylose) had the least. Therefore, the dual effects of granule structure and packing density, especially in the amorphous region, are determinant factors of the enzymatic digestion rate and product. Swelling power was found to be a valuable predictive tool of amylose content and pasting characteristics of the tested starches. The studied starches varied in their digestibility and displayed structural differences in the course of α-amylase digestion. Based on these findings, W.S. was designated the most susceptible among the starches and S.P.S. was the least. The most starch gel setback was observed for the legume starches, chickpeas, and Turkish beans (C.P. 2553 cP and T.B. 1172 cP). These results were discussed with regard to the underlying principles of swelling tests and pasting behavior of the tested starches. Therefore, GSE is an effortless economic technique that can be used for starch digestion (modification) at industrial scale.

scholarly journals Proximate composition of Malaysian local sweet potatoes

Food Research ◽  
2021 ◽  
Vol 5 (S1) ◽  
pp. 73-79
Author(s):  
N.A. Zulkifli ◽  
M.Z.M. Nor ◽  
F.N. Omar ◽  
A. Sulaiman ◽  
M.N. Mokhtar
Keyword(s):  
Sweet Potato ◽  
Proximate Composition ◽  
Crude Protein ◽  
Ipomoea Batatas ◽  
Animal Feed ◽  
Sweet Potatoes ◽  
Crude Fibre ◽  
By Products ◽  
Different Parts

Sweet potato (Ipomoea batatas (L.) Lam) is one of the main crops worldwide. However, systematic properties characterization of this crop is still required, particularly on the Malaysian local sweet potatoes. Hence, this study aims to determine the proximate composition and the energy value of five common varieties of local sweet potato (Anggun 1, Anggun 2, Anggun 3, White, and VitAto) in Malaysia. For each variety, three different parts of the tuberous root which were the skin, the cortex, and the mixture of cambium and parenchyma were characterized. The findings indicated that VitAto exhibited the highest starch (16.95% – 17.17%) and crude protein (0.86% – 1.15%) contents in all parts as compared to other varieties, hence reflecting its potentials to be further processed for a mass starch production. Among all the parts, the skin contained the highest crude protein, crude fat, ash and crude fibre, which can be further utilized to produce by-products such as animal feed. The findings in this study serve as a baseline for the future starch and byproducts production from local sweet potatoes.

scholarly journals Study of the efficiency of sweet potato growing in the Forest-Steppe of Ukraine by different methods of soil mulching

2021 ◽  
pp. 17-24
Author(s):  
Oleksandr Kuts ◽  
Svetlana Shevchenko ◽  
Ivan Semenenko ◽  
Evgen Dukhin ◽  
Artem Yakovchenko ◽  
...  
Keyword(s):  
Vitamin C ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Polyethylene Film ◽  
Forest Steppe ◽  
Potato Tubers ◽  
Labor Costs ◽  
Sweet Potatoes ◽  
Active Growth ◽  
Total Length

Sweet potato (Ipomoea batatas L.) is a new crop for soil and climatic conditions of Ukraine, the active implementation of which is hindered by the lack of recommendations on technological aspects of cultivation. One of the important technological measures for growing sweet potatoes is the use of soil mulching, which improves the water regime and regulates the thermal regime of the soil; prevention of weed growth and growth of sweet potato shoots to the soil. Thus, the aim of the research is to determine the efficiency of growing sweet potatoes in the Forest-Steppe of Ukraine by different methods of soil mulching. Field research was carried out on typical low-humus light loamy chernozem on loess loam. It was noted, that when growing sweet potatoes on ridges, the introduction of mulching the soil with black polyethylene film provides more active growth of the vegetative mass throughout the growing season (5.33 shoots/plant with a total length of 252.1 cm), while growing without ridges has a positive effect on plants growth due to the general absence of mulch (2.53 shoots/plant with a total length of 107.8 cm). The use of ridges and mulching the soil with black polyethylene film causes the yield of sweet potato tubers at 34.8 t/ha, while the mulching of the soil with straw, the yield was 18.3–21.9 t/ha, without mulching – 13.0–17, 1 t/ha. Mulching with black polyethylene film ensures the accumulation of vitamin C and starch in sweet potato tubers. When growing the culture on ridges by this method of mulching, the maximum level of vitamin C according to the experiment (4.78 mg/100 g) and starch (11.73 %) was noted. The introduction of mulching and ridge formation involves additional material and labor costs, but helps to reduce weed control and tuber digging costs. When growing sweet potatoes on ridges with mulching with black polyethylene film, the minimum additional labor costs for the formation of a unit of yield (1.95 man-minutes/kg of tubers) were noted, while without mulching and without ridges this figure was 6.76 man-minute/kg

Rôle des différents territoires foliaires dans le phénomène de la tubérisation chez la patate douce

1982 ◽  
Vol 60 (12) ◽  
pp. 2659-2664
Author(s):  
Darasinh Sihachakr ◽  
Line Rossignol ◽  
Martial Rossignol ◽  
René Nozeran
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Symmetrical Structure ◽  
Intact Leaf ◽  
Different Parts

Sweet potato (Ipomoea batatas (L.) Lam., Convolvulaceae) leaf cuttings initiate several kinds of roots, some of which develop tubers. The influence of different parts of the lamina on the root tuberization rate was tested by means of excision and incision of lamina pieces. Following the ablation, it has been shown that: (i) retention of half of the whole symmetrical structure of the lamina is necessary for optimal root tuberization, equivalent to that of the intact leaf; (ii) below this limit, root tuberization rate depends on the size of the assimilating surface of the leaf; (iii) when the median veins are affected there is a significant decrease of tuberization rate compared with an equivalent lamina excision which does not affect these veins. We conclude therefore that these median veins may have a particular role in the metabolite translocation which controls, to a large extent, the root tuberization process.

scholarly journals Physico-chemical Properties of Starches from Two Varieties of Sweet Potato and Yam Tubers Available in Nigeria

2020 ◽  
pp. 28-38 ◽  
Author(s):  
N. S. Donaldben ◽  
O. O. Tanko ◽  
T. O. Hussaina
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Chemical Properties ◽  
Pasting Properties ◽  
Absorption Capacity ◽  
Weight Basis ◽  
Peak Time ◽  
Potato Varieties ◽  
Significant Difference ◽  
Starch Yield

The research sought to investigate the functional properties of starches obtained from four Nigerian root and tubers, yam and sweet potato varieties, in order to facilitate their exploitation as substitute raw material for the local food and pharmaceutical manufacturing industry. The varieties, namely: white yam (Dioscorea rotundata), water yam (Dioscorea alorta), orange flesh sweet potato (Ipomoea batatas) and cream flesh sweet potato (Ipomoea batatas), their respective starches were obtained by wet separation techniques and were analyzed for their pasting properties, physic-chemical properties, starch yield on dry and wet basis, functional, starch purity, amylase and amylo-pectin were undertaken in order to determine their suitability for food and other uses. The peak time, pasting temperature, peak viscosity, holding strength, breakdown, set from peak and set back from through ranged from 7.3 – 8.3 mins, 65.4 – 71.3°C, 511.5 – 1001.2 BU, 860.8 – 871.3 BU, 300.1 – 306.9 BU, 240.8 – 248.1 BU and 400.4 – 510.9 BU respectively. There were significant differences (p<0.05) in the pasting properties. The crude protein, crude fat, crude fibre, ash, moisture and carbohydrate ranged from 1.55 – 1.85%, 0.09 – 0.12%, 0.12 – 0.22%, 1.32 – 2.05%, 10.72 – 11.09% and 85.59 – 86.20% respectively. There were significant differences (p<0.05) in the proximate composition of the starches. The starch yield on dry weight basis, starch weight on fresh weight basis, starch yield from tubers and percentage dry matter ranged from 56.84 – 85.88%, 22.75 – 36.07%, 18.02 – 26.00% and 40.02 – 44.01% respectively. There were significant differences (p<0.05) in the all the parameters. The bulk density, water absorption capacity, oil absorption capacity, gelatinization temperature, starch purity, amylase, amylo-pectin and pH ranged from 0.56 – 0.61g/cm3, 86.8 – 99.4%, 103.2 – 125.4%, 59.78 – 60.42°C, 95.28 – 96.55%, 27.25 – 29.37%, 70.63 – 72.63% and 6.82 – 6.91 respectively. There were significant differences (p<0.05) in all the parameters but no significant difference (p>0.05) in the pH. The starches from yam and sweet potato varieties starches can be exploited for diverse uses based on their different characteristics.

scholarly journals Performance of weaner rabbits fed graded levels of sun-dried sweet potato tuber meal (Ipomea batatas) diets

2021 ◽  
Vol 33 (2) ◽  
pp. 186-191
Author(s):  
M. Orunmiyi ◽  
G. S. Bawa ◽  
R. M. Musa
Keyword(s):  
Weight Gain ◽  
Potato Tuber ◽  
Sweet Potato ◽  
Feed Intake ◽  
Ipomoea Batatas ◽  
Live Weight ◽  
Performance Parameters ◽  
Feeding Trial ◽  
Ipomea Batatas ◽  
Potato Meal

Forty weaned rabbits (8 weeks old) of mixed sexes and breed, with an average initial live-weight of 680g, were used in a nine-week feeding trial to evaluate their performance on diets in which sun-dried sweet potatoe tuber meal (Ipomoea batatas) was included at the rate of 0, 10, 20, 30 and 40% levels in a CP Isonitrogenous diets. Performance parameters showed that feed intake, weight gain and feed to gain ratio were not significantly different between treatments. Values obtained were poorer for the sweet potato based diets compared to the control. No mortality was recorded during the experiment. Carcass and oragn weights expressed as percentage of live-weight showed no significant differences (P>0.05) across the treatments. It was concluded that sweet potato meal can be included   up to 40% level in diets of young rabbits.  

scholarly journals Performance and economics of production of Japanese quails (Coturnix coturnix japonica) fed varying levels of peeled cooked sun-dried sweet potato (Ipomoea batatas) meal diets

2021 ◽  
Vol 43 (2) ◽  
pp. 181-191
Author(s):  
J. A Edache ◽  
C. D., Tuleun ◽  
R. U Muduudtai ◽  
A. G. Yisa
Keyword(s):  
Potato Tuber ◽  
Sweet Potato ◽  
Feed Intake ◽  
Ipomoea Batatas ◽  
Growth Parameters ◽  
Control Diet ◽  
Efficiency Ratio ◽  
Gross Margin ◽  
Japanese Quails ◽  
Feed Cost

A six–week feeding trial was carried out to investigate the effect of feeding peeled cooked sundried sweet potato tuber on growth parameters and economics of production of Japanese quails. Five isonitrogenous (25%CP) diets were compounded. The control diet (1) had no sweet potato tuber meal while 2, 3, 4 and 5 had maize replaced at 25, 50, 75 and 100% by peeled and cooked sundried sweet potato tuber meal respectively.. Three hundred day-old Japanese quails of mixed sexes were randomly assigned the diets in a completely randomized design with feed and water provided ad libitum for six weeks. Each diet was allocated to 60 quail chicks which were further divided into three replicates of 20 birds each. Feed intake was significantly (p< 0.05) lower for birds on diet 3 (14.05g/b/d) than for those on diets 4 (14.87g/b/d) and 5 (14.79g/b/d). Water intake was however significantly (p < 0.05) higher for birds on diet 4 (27.40ml/b/d) than for those on diets 1 (23.77ml/b/d), 2 (24.01ml/b/d) and 3 (24.66ml/b/d). Protein intake was significantly (p<0.05) higher for birds on diet 4 (3.72g/b/d) than for those on diets 1 (3.55g/b/d), 2 (3.54g/b/d) and 3 (3.51g/b/d). Energy efficiency ratio was significantly (p<0.05) better on diet 5 (0.29) than on diet 1 (0.24) only. However, weight gain, feed conversion ratio, feed cost/gain, energy intake and protein efficiency ratio did not differ significantly (p>0.05) from the control. Total cost of production per bird was significantly (p< 0.05) higher on diet 3 than on diets 4 and 5. Revenue per bird was significantly (p< 0.05) lower on diet 2 than on diets 1 and 4 only. Gross margin per bird was significantly (p<0.05) lower on diet 2 than on diets 1 and 3 only. Total feed intake and feed cost/kg gain were not affected by the diets (p>0.05) and diet 5 has a cost saving of 3.00% over the control diet. Results showed that peeled cooked sundried sweet potato can completely replace maize in the diet of quail chicks without adverse effects on performance or on economics of production of Japanese quails.

Sign in / Sign up

Export Citation Format

Share Document