scholarly journals Characterization of a Mixture of Oca (Oxalis tuberosa) and Oat Extrudate Flours: Antioxidant and Physicochemical Attributes

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Marisol P. Castro-Mendoza ◽  
Heidi M. Palma-Rodriguez ◽  
Erick Heredia-Olea ◽  
Juan P. Hernández-Uribe ◽  
Edgar O. López-Villegas ◽  
...  
Keyword(s):  
Moisture Content ◽  
Starch Content ◽  
Antioxidant Properties ◽  
Moisture Concentration ◽  
Oxalis Tuberosa ◽  
High Starch Content ◽  
High Starch ◽  
Extruded Products ◽  
Inverse Pattern

The oca (Oxalis tuberosa) is a tuber with high starch content and excellent antioxidant properties, which can be used in the production of extruded products; however, starch-rich products can be improved nutritionally through the incorporation of fibers that can result in extrudates with beneficial health properties. The aim of this work was to develop a mixture of oca (Oxalis tuberosa) and oat extrudate flours and evaluate the antioxidant and physicochemical attributes. The results showed that a higher moisture content increased the hardness, water absorption index, and density of the extrudates; however, the solubility and expansion indexes showed an inverse pattern. The addition of oat fiber had the opposite effect from moisture content on the physicochemical properties mentioned above. The cellular antioxidant activity (CAA) of the extrudates decreased when the oat fiber increased. An inverse pattern was observed when the moisture concentration was increased. The starch hydrolysis percentage and glycemic index decreased significantly when the fiber content increased. Oat fiber contributed 67.29% and 65.04% to these parameters, respectively. Oat fiber exerted a greater effect than moisture on the collets extruded in this study according to factor contributions.

scholarly journals Preparasi Dan Karakterisasi Edible Film Dari Poliblend Pati Sukun-Kitosan

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Wini Setiani ◽  
Tety Sudiarti ◽  
Lena Rahmidar
Keyword(s):  
Tensile Strength ◽  
Water Uptake ◽  
Water Resistance ◽  
Starch Content ◽  
Raw Material ◽  
Edible Film ◽  
High Starch Content ◽  
High Starch ◽  
Grey Colour

Abstrak   Plastik biodegradable dan terbuat dari bahan terbarukan seperti edible film merupakan salah satu solusi permasalahan lingkungan. Bahan baku utamanya yaitu pati, karena keberadaannya melimpah serta beragam di Indonesia, salah satunya pati sukun yang memiliki kandungan pati cukup tinggi (60 %). Namun edible film berbahan dasar pati saja memberikan sifat mekanik dan ketahanan air yang masih rendah. Pada penelitian ini akan dipreparasi edible film dari poliblend pati sukun-kitosan dengan plasticizer sorbitol. Metode yang dilakukan yaitu preparasi dan karakterisasi pati sukun kemudian preparasi dan karakterisasi edible film. Hasil karakterisasi pati sukun yang diperoleh yaitu kadar pati total 76,39 %, kadar amilosa dan amilopektin berturut-turut 26,76 % dan 73,24 %, suhu gelatinisasi pati sukun 73,98 ºC, kadar air 22,38 % serta derajat kecerahan yang menunjukkan karakteristik cerah dan berwarna abu-abu pucat. Hasil karakterisasi edible film menunjukkan, dengan bertambahnya kitosan maka kuat tarik dan ketahanan air cenderung meningkat. Secara umum hasil terbaik edible film adalah pada formulasi pati sukun-kitosan 6:4 dengan nilai water uptake sebesar 212,98 %, nilai kuat tarik sebesar 16,34 MPa, nilai elongasi sebesar 6,00 % dan modulus young sebesar 2,72 MPa. Meskipun demikian, hasil analisis morfologi edible film pada formulasi pati sukun-kitosan 6:4 masih terdapat pori dan retakan.   Kata kunci : edible film, pati sukun, kitosa.   Abstract   Biodegradable and renewable plastic such as edible film is one of solution the environmental problem. The main raw material is from starch, because of it is abundant and varied in Indonesia, one of them is breadfruit starch which has enough high starch content (60 %). But edible film based on starch give less mechanical properties and less water resistance. In this research the edible film was made from poliblend of breadfruit starch-chitosan with sorbitol addition. The Method was done, preparation and characterization of breadfruit starch then preparation and characterization of edible film. The characteristic result of breadfruit starch was obtained for total starch content 76.39 %, content of amylose and amylopecktin were 26.76 % and 73.24 % respectively, the gelatinitation temperature of breadfruit starch was 73.98 ºC, water content 22,38 % and the degree of brightness showed bright characteristic and pale grey colour. The characteristic result of edible film showed the increasing of chitosan concentration, the tensile strength and water resistance tended to rise. Generally the best result of edible film was on breadfruit starch-chitosan formulation 6:4 g/g by the value of water uptake was 212.98 %, tensile strength was 16.34 MPa, elongation was 6,00 % and modulus young was 2,72 MPa. However, the result of mhorphology analysis showed that the edible film of breadfruit starch-chitosan formulation 6:4 are still pores and cracks.   Keywords : edible film, breadfruit starch, chitosan.

scholarly journals The estimation of the new self-pollinated waxy maize lines and hybrids (Zea mays l. Ceratina)

2021 ◽  
Vol 1 (2) ◽  
pp. 22-26
Author(s):  
A. S. Ignatiev
Keyword(s):  
Moisture Content ◽  
Agricultural Research ◽  
Starch Content ◽  
Natural Background ◽  
Maize Hybrids ◽  
Waxy Maize ◽  
High Starch Content ◽  
Economically Valuable Traits ◽  
High Starch ◽  
Harvest Moisture

Though waxy maize is a valuable raw material for the starch industry, its subspecies are still poorly studied. The purpose of the current work was to study the new self-pollinated hybrids and lines of waxy maize according to a complex of economically valuable traits and to identify promising ones for further breeding. The study was carried out at the FSBSI “Agricultural Research Center “Donskoy” in 2019–2020. The objects of research were 40 self-pollinated waxy maize lines and 30 hybrids developed in the Center. They were studied according to a set of economically valuable traits. There have been identified the self-pollinated lines (24/82, 26/18, 26/51, 24/15) with a high kernel productivity of 0.91–2.23 t/ha, low and medium harvest moisture content of kernel (14.0–14.7%), high resistance to lodging (0–4.6% of lodged plants), weak infestation with smut on a natural background (0–5.0% of damaged plants). There have been identified the lines (24/15, 26/18), characterized by a high starch content in matured kernel (69.2% and 69.8%). There have been developed the new waxy maize hybrids (91×93, 103×105), which significantly exceeded the standard hybrid ‘Zernogradsky 282 MB’ both in kernel productivity (on 0.41–0.80 t/ha) and in the yield of amylopectin starch (on 0, 20–0.54 t/ha). The new hybrids were characterized with low harvest moisture content of kernels (13.3–13.9%), resistance to lodging and smut on a natural background. There have been identified the new maize hybrids (91 × 94, 91×93, 91×95) with a high starch content (68.5–68.9%), an average oil content (4.4–4.6%) and protein percentage (12.1–12.2%) in matured kernel.

RNA Sequence Analysis of Cassava Varieties with High-Starch Content Using De Novo Assembly

2017 ◽  
Vol 37 (2) ◽  
pp. 517-529 ◽  
Author(s):  
Ya-Jing Guo ◽  
Xing-Lu Luo ◽  
Mao-Gui Wei ◽  
Zhao-Liang Liu ◽  
Wu-Jing Fan ◽  
...  
Keyword(s):  
Sequence Analysis ◽  
De Novo Assembly ◽  
De Novo ◽  
Starch Content ◽  
Rna Sequence ◽  
High Starch Content ◽  
High Starch ◽  
Cassava Varieties

scholarly journals Continuous Blown Film Preparation of High Starch Content Composite Films with High Ultraviolet Aging Resistance and Excellent Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3813
Author(s):  
Bowen Lin ◽  
Chengqiang Li ◽  
Fangping Chen ◽  
Changsheng Liu
Keyword(s):  
Mechanical Properties ◽  
Lignin Content ◽  
Starch Content ◽  
Composite Films ◽  
Oh Groups ◽  
Longitudinal Tensile Strength ◽  
High Starch Content ◽  
Aging Resistance ◽  
High Starch ◽  
Ultraviolet Aging

Starch/PBAT blown films with high ultraviolet aging resistance and excellent mechanical properties were prepared by introducing lignin with polyurethane prepolymer (PUP) as a starch modifier and physical compatibilizer and 4,4′–methylene diphenyl diisocyanate (MDI) as a crosslinker. Starch was modified by reacting the NCO groups of the PUP with the OH groups of the starch to form a carbamate bond. The mechanical properties, hydrophobic properties, ultraviolet barrier, ultraviolet aging properties and microscopic morphology of starch/PBAT films with different contents of lignin were investigated. The results showed that the starch/PBAT films were blown continuously. The addition of lignin did not decrease the mechanical properties. On the contrary, the film with 1% lignin possessed the excellent mechanical properties with longitudinal tensile strength of 15.87 MPa and the elongation at a break of 602.21%. In addition, the higher the lignin content, the better the UV blocking effect. The introduction of lignin did not affect the crystalline properties but improved the hydrophilic properties and sealing strength of the high starch content composite films.

scholarly journals Screening of Soybean Germplasm with High Starch Content

2014 ◽  
Vol 46 (1) ◽  
pp. 52-57 ◽  
Author(s):  
Sung Cheol Koo ◽  
Myeong Gi Jeon ◽  
Young Hoon Lee ◽  
Hyun-Young Kim ◽  
Beom Kyu Kang ◽  
...  
Keyword(s):  
Starch Content ◽  
Soybean Germplasm ◽  
High Starch Content ◽  
High Starch

Prospects for the utilisation of cocoyam corm meal in poultry feeding

2020 ◽  
Vol 60 (5) ◽  
pp. 603
Author(s):  
S. S. Diarra
Keyword(s):  
Starch Content ◽  
Antinutritional Factors ◽  
Feed Processing ◽  
Nutritional Profile ◽  
Diet Formulation ◽  
High Starch Content ◽  
High Starch ◽  
Poultry Feeding ◽  
Increasing Demand ◽  
The Cost

Context The increasing demand for maize for human food and industrial uses has stimulated research interest into alternative low value crops as energy sources for poultry. Several high yielding species of aroids, commonly known as taro or cocoyam, are currently in less demand for food or industrial uses and readily available for poultry feeding. Aims To review the production, nutritional profile and antinutritional factor and current uses of cocoyam corm and the effect of processing on its utilisation in poultry feeding. Key findings The nutritional profile of cocoyam with protein content comparable or higher than maize, high starch content and starch digestibility make it a suitable energy ingredient for poultry. The major issues affecting the utilisation of cocoyam include the high moisture and low dry matter contents and the presence of antinutritional factors, mainly calcium oxalate. These constraints may preclude the utilisation of cocoyam corm in commercial diets but it could be used to reduce the cost of production on small-holder farms. Conclusion With adequate processing and proper diet formulation, cocoyam corm meal may be fed up to 280 g/kg diet but unprocessed meal may exert adverse effects on poultry performance even as low as 44 g/kg. Several animal factors including age, species and type of bird (meat or egg) affect the utilisation of cocoyam corm meal by poultry. Implications Reduction of cost of animal protein production and value addition to underutilised aroids. More research is needed into animal factors and feed processing that would allow optimum utilisation of the corm by poultry.

Vessel wall vibrations: trigger for embolism repair?

2008 ◽  
Vol 35 (4) ◽  
pp. 289 ◽  
Author(s):  
Sebastiano Salleo ◽  
Patrizia Trifilò ◽  
Maria Assunta Lo Gullo
Keyword(s):  
Acoustic Waves ◽  
Starch Content ◽  
Membrane Integrity ◽  
Physical Nature ◽  
Xylem Embolism ◽  
Cell Membrane Integrity ◽  
Primary Signal ◽  
High Starch Content ◽  
High Starch ◽  
Conduit Wall

Xylem embolism repair is preceded by starch depolymerisation in vessel-associated cells (VAC) of Laurus nobilis L. (laurel) twigs, but the primary signal triggering such a process is still unknown. We tested the hypothesis that conduit wall vibrations during cavitation may be sensed by VAC inducing starch-to-sugar conversion. Twigs of laurel from watered or stressed plants were exposed to ultrasound for 60 min to simulate acoustic waves emitted by cavitating conduits. Preliminary tests showed that ultrasound caused no damage to cell membrane integrity nor did they cause xylem embolism. The number of VAC with high starch content (HSC-cells) was estimated microscopically by counting the cells with more than 50% of their lumen filled with starch granules. Sonication had no effect on HSC-cells in twigs from watered plants while it induced a drop in the percentage HSC-cells from 80 to 40% in twigs from stressed plants, at the ultrasound source location. No effect was recorded in these twigs 20 mm from the ultrasound source. Sonication was a good simulator of cavitation in inducing starch depolymerisation which suggests a possible bio- physical nature for the signal initiating embolism repair.

scholarly journals The effect of patterns of rumen fermentation on the response by dairy cows to dietary protein concentration

1990 ◽  
Vol 63 (2) ◽  
pp. 177-186 ◽  
Author(s):  
J. A. Lees ◽  
J. D. Oldham ◽  
W. Haresign ◽  
P. C. Garnsworthy
Keyword(s):  
Dairy Cows ◽  
Milk Fat ◽  
Starch Content ◽  
Live Weight ◽  
Lactation Performance ◽  
Protein Nitrogen ◽  
High Starch Content ◽  
High Fibre ◽  
High Starch ◽  
Protein Supply

Four groups of seven dairy cows were given hay plus high-fibre concentrates based on sugar-beet feed (hay-concentrate, 40:60 w/w) or high-starch concentrates based on flaked maize (hay-concentrate, 20:80 w/w), with a crude protein (nitrogen x 6.25) content of either 160 or 220 g/kg dry matter, over weeks 4–18 of lactation. Performance during week 3 of lactation, when all cows were fed on a standard ration, was used as a covariate. For diets with a high-fibre content, higher protein concentrations led to increases in yields of milk and milk fat, with no effect on live-weight loss. For diets with a high-starch content, higher protein concentrations did not affect milk yield or composition but resulted in an increase in live weight rather than a decrease. Diets with a high-starch content led to increased proportions of propionic acid in the rumen and increased concentrations of insulin in the blood. It is concluded that the source of carbohydrate needs to be taken into account when predicting the response to protein supply by dairy cows.

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