Effects on starch and amylolytic enzymes during Lepidium meyenii Walpers root storage

Rondan-Sanabria, Gerby Giovanna; Valcarcel-Yamani, Beatriz; Finardi-Filho, Flávio

doi:10.1016/j.foodchem.2012.03.056

Cited by 13 publications

(3 citation statements)

References 25 publications

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“…The amylolytic enzymes hydrolyse α ‐glucosidic bonds from amylose and amylopectin (Rondán‐Sanabria et al . ). The proportions of amylolytic isolates were 15–25% for the bacteria and 12–17% for fungi.…”

Section: Discussionmentioning

confidence: 97%

Microbial populations and activities of mangrove, restinga and Atlantic forest soils from Cardoso Island, Brazil

Pupin

Nahas

2014

J Appl Microbiol

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Aim: Mangroves provide a distinctive ecological environment that differentiates them from other ecosystems. This study deal to evaluate the frequency of microbial groups and the metabolic activities of bacteria and fungi isolated from mangrove, restinga and Atlantic forest soils. Methods and Results: Soil samples were collected during the summer and winter at depths of 0-2, 2-5 and 5-10 cm. Except for fungi, the counts of the total, sporulating, Gram-negative, actinomycetes, nitrifying and denitrifying bacteria decreased significantly in the following order: Atlantic forest > mangrove > restinga. The counts of micro-organisms decreased by 11 and 21% from the surface to the 2-5 and 5-10 cm layers, but denitrifying bacteria increased by 44 and 166%, respectively. A larger growth of micro-organisms was verified in the summer compared with the winter, except for actinomycetes and fungi. The average frequency of bacteria isolated from mangrove, restinga and Atlantic forest soils was 95, 77 and 78%, and 93, 90 and 95% for fungi, respectively. Bacteria were amylolytic (33%), producers of acid phosphatase (79%) and solubilizers (18%) of inorganic phosphate. The proportions of fungi were 19, 90 and 27%. Conclusion: The mangrove soil studied had higher chemical characteristics than the Atlantic forest, but the high salinity may have restricted the growth of microbial populations. Significance and Impact of the Study: Estimates of the microbial counts and activities were important to elucidate the differences of mangrove ecosystem from restinga and Atlantic forest.

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Section: Discussionmentioning

confidence: 97%

Microbial populations and activities of mangrove, restinga and Atlantic forest soils from Cardoso Island, Brazil

Pupin

Nahas

2014

J Appl Microbiol

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“…According to UV-Visible spectrophotometric analysis, the tuber contains 77.4 percent of starch and 87.6 percent of amylose, as seen in Table 1. Solubility, swelling power and water holding capacity of starch Solubility, swelling potential and capacity to retain water are closely associated with temperature 27 . The source, the swelling capacity, the inter-association forces in the amorphous and crystalline domain, and the presence of other compounds are factors that can affect starch solubility 28 .…”

Section: Starch and Amylose Contentmentioning

confidence: 99%

Structural and Physicochemical Characters of Starch Isolated from Tubers of an Aquatic Plant Aponogeton natans using modern analytical tools

Dash,

Sahoo,

Sahoo

et al. 2024

Preprint

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Background: Aponogeton natans, an aquatic floating plant belonging to the family Aponogetonaceae, is endemic to India. Its tubers have been traditionally consumed by various tribal communities in India, either raw or after processing. Materials and Methods: The starch was extracted from the tubers of Aponogeton natans, and its physicochemical properties were analyzed using UV-Vis spectrophotometry, scanning electron microscopy (SEM), zeta potential analysis, X-ray diffraction (XRD), and differential scanning calorimetry (DSC). Results: The tubers of Aponogeton natans yielded 77.4% starch, of which 87.6% was amylose. SEM analysis revealed that the starch granules were spherical with a smooth surface. The zeta potential value indicated good colloidal stability. The XRD and DSC analyses confirmed the presence of B-type starch polymorphs. Conclusion: Aponogeton natans could serve as an important dietary source of starch due to its high amylose content, which contributes to increased retrogradation and resistant starch formation. The study suggests potential applications of this starch in the food processing and pharmaceutical industries, owing to its unique properties.

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“…Currently, the main sources of starch for the manufacture of biodegradable materials are corn, potato, yucca and banana, among others, starch corn being the commonly used polymer in the manufacture of thermoplastic starch (TPS) for industries such as BIOP Biopolymer, Cardia bioplastics, Cerestech and Novamont, among others . However, in many parts of the world, this product of agricultural origin are the main food source for the inhabitants; therefore, researchers are particularly interested in the search for starch from unconventional sources, which are not used as food for the population, and in this way exploit unused natural resources in diverse areas . In this sense, the seeds of the ramon tree, a very abundant natural resource in the southeast of Mexico, are a unconventional source of native starch which is not used for human consumption.…”

Section: Introductionmentioning

confidence: 99%

Utilization of ramon seeds (Brosimum alicastrum swarts) as a new source material for thermoplastic starch production

Ríos-Soberanis

Estrada‐León²,

Moo-Huchin³

et al. 2016

J of Applied Polymer Sci

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The development and characterization of biodegradable polymers deriving from renewable natural sources has attracted much attention. The aim of this work was to partially characterize a thermoplastic starch obtained from the starch of seeds from the ramon tree (TPS‐RS) as an option to substitute thermoplastic starch from corn (TPS‐CS), in some of its applications. At 55% of relative humidity (RH), TPS‐RS had higher tensile strength and deformation than TPS‐CS. X‐ray diffraction analysis showed similar values in residual crystallinity (percentage of crystallinity that remains after plasticization process) in both TPS. The SEM micrographs showed a few remnant granular structures in the TPS‐RS. The FTIR showed a greater intensity in band at 1016 cm−1 in the TPS‐CS and TPS‐RS in comparison with their corresponding native starch, indicating an increase in the amorphous region after plasticization. The TGA analysis showed greater thermal stability in TPS‐CS (340 °C) compared with TPS‐RS (327 °C). In addition, the glass transition temperature in both TPS was 24 °C. The results obtained represent a starting point to potentialize the use of TPS‐RS instead of TPS‐CS for the development of new biodegradable materials for practical applications in different areas. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44235.

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Effects on starch and amylolytic enzymes during Lepidium meyenii Walpers root storage

Cited by 13 publications

References 25 publications

Microbial populations and activities of mangrove, restinga and Atlantic forest soils from Cardoso Island, Brazil

Microbial populations and activities of mangrove, restinga and Atlantic forest soils from Cardoso Island, Brazil

Structural and Physicochemical Characters of Starch Isolated from Tubers of an Aquatic Plant Aponogeton natans using modern analytical tools

Utilization of ramon seeds (Brosimum alicastrum swarts) as a new source material for thermoplastic starch production

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