Thermal analysis as a screening technique for the characterization of babassu flour and its solid fractions after acid and enzymatic hydrolysis

Almeida, Rafael Ramirez de; Lacerda, Luíz Gustavo; Murakami, Fábio S.; Bannach, Gilbert; Demiate, Ivo Mottin; Soccol, Carlos Ricardo; Filho, Marco Aurélio da Silva Carvalho; Schnitzler, Egon

doi:10.1016/j.tca.2011.02.029

Cited by 23 publications

(13 citation statements)

References 21 publications

(18 reference statements)

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“…Thermogravimetry-differential thermal analysis (TG-DTA) Simultaneous TG-DTA curves were obtained, based on previous described methodology, with heating rate of 10°C min -1 , alumina crucibles, sample about 5.0 mg [1,5,8]. The experiments were carried out under synthetic air flow of 100 mL min -1 , in a DTG-60 System (Shimadzu, Japan).…”

Section: Enzymatic Hydrolysismentioning

confidence: 99%

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Porous waxy maize starch

Malucelli

Lacerda

Filho

et al. 2015

J Therm Anal Calorim

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Starch is the most important storage reserve carbohydrate in plants, and it has wide uses in the industry. It is also the main energy-providing source in human nutrition. Waxy starch, in turn, is virtually composed by amylopectin, with very low levels of amylose. This corn starch variety was partially hydrolyzed in order to verify the granules behavior and to study thermal phase transitions by thermal analysis, such as differential scanning calorimetry and simultaneous thermogravimetry-differential thermal analysis. Morphological and structural studies were performed, such as scanning electron microscopy and X-ray diffractometry. It was verified that treated samples showed low variation of enthalpy levels and also a slight increase in gelatinization temperature, possibly due to higher granule resistance to degradation. X-ray diffractometry analysis is within that expected, showing pattern A-type. Treated samples showed low viscosity peak and tendency to retrogradation when compared to its native counterpart.

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Section: Enzymatic Hydrolysismentioning

confidence: 99%

“…Conventional hybrid breeding and genetic engineering has the potential to provide even more options. For instance, amylose-free starch presents reduced retrogradation, easier gelatinization, forms clear paste and it has improved freeze-thaw stability [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Porous waxy maize starch

Malucelli

Lacerda

Filho

et al. 2015

J Therm Anal Calorim

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“…This palm tree attains up to 20 meters in height and is native from South America, occurring widely in the north and north-east regions of Brazil, found in a transitional biome between the Amazon rainforest and the Caatinga ecosystems called Coconut Forests (Mata dos Cocais) and also along Bolivia, Colombia and Suriname. [17][18][19] The main product obtained from Babassu is the kernel oil which is extracted by pressing the kernel, used like raw material in cosmetic industries, oleochemicals, biofuels and food. Around 7% of the fruit total weight is kernel, so the Babassu kernel oil yield is low.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric and spectroscopic study (TG–DTA/FT–IR) of activated carbon from the renewable biomass source Babassu

Oliveira¹,

Andrade²,

Trindade³

et al. 2016

Quim. Nova

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carbons (ACs) with well-developed microstructure and high microporosity were obtained from biomass by potassium hydroxide activation. The preparation process consisted in producing carbon materials in the ratios of activating agent to raw material 70:30, 50:50, 30:70 and 25:75 (w/w) characterized by thermal analysis coupled to spectroscopy (TG-DTA / FT-IR), scanning electron microscopy (SEM), N 2 adsorption isotherms at -196 °C and activation isotherm at 500 and 600 °C for 3.0 h. Specific surface areas (SBET) within 728 and 1712 m 2 g -1 and (S mic ) within 1054 and 1923 m 2 g -1 were obtained, while the micropores surface area was calculated using the Dubinin-Astakhov (DA) equation and the pore size distribution calculated from density functional theory (DFT) was found to be in the range 1.09 -1.77 nm. Adsorption isotherms were fitted using Langmuir and Freundlich non-linear models and the adsorption capacity determined for methylene blue dye was between 27.13 and 459.20 mg g -1 .

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“…A palmeira de babaçu é uma palmeira robusta que pode crescer até 20 m de altura, com estipe isolado cilíndrico de dispostos em cachos, produzindo até seis cachos por palmeira 1,[3][4] . O meristema apical é até 70 cm abaixo do nível do solo, tornando-o mais resistente ao corte 4 .…”

Section: Introductionunclassified

Parâmetros de qualidade físico-química de óleos e análise morfométrica de frutos e sementes da espécie Orbignya phalerata Martius por região ecológica

et al. 2016

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Resumo: Este trabalho teve como objetivo analisar as características físico-químicas de óleos e as características morfométricas de frutos e sementes (amêndoas) do babaçu (Orbignya phalerata Martius), por região ecológica do estado do Maranhão. Para isso, foram obtidas amostras de babaçu oriundas das regiões: Litoral, Cocais, Baixada, Cerrado e Pré-Amazônia maranhense e analisados os parâmetros físico-químicos: índice de acidez, índice de saponificação, índice de refração e umidade. Das mesmas regiões foram coletados, para análise das características morfométricas, frutos inteiros e de amêndoas da espécie estudada. Os resultados apontam que os índices de acidez estão dentro do limite máximo estabelecido pela norma nacional da ANVISA (2009); os índices de saponificação indicam a presença de lipídeos (ácidos graxos) de médio a alto peso molecular na composição química dos óleos, os resultados refratométricos estão condizentes com as normais atuais vigentes e o teor de umidade foi inferior a 1%. Os lotes de babaçu Orbignya phalerata Martius não apresentaram variabilidade significativa (p>0,05) em tamanho (cm) para os frutos e amêndoas por região. Os parâmetros físico-químicos dos óleos aqui avaliados poderão contribuir com as indústrias que utilizam o óleo de babaçu em seus produtos manufaturados. As características morfométricas dos frutos inteiros e das amêndoas da espécie estudada poderão contribuir para propostas de produção de máquinas úteis para a quebra do coco babaçu. (2009), the saponification indices indicate the presence of medium to high molecular weight lipids (fatty acids) in the chemical composition of the oils; the results refractometers are in line with current standards and the moisture content was less than 1%. The Orbignya phalerata Martius babassu lots did not present significant variability (p> 0.05) in size (cm) for fruits and almonds by region. The physical-chemical parameters of the oils evaluated here may contribute to the industries that use babassu oil in their manufactured products. The morphometric characteristics of the whole fruits and the almonds of the studied species may contribute to the production of useful machines for the breaking of babassu coconut. Palavras

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Thermal analysis as a screening technique for the characterization of babassu flour and its solid fractions after acid and enzymatic hydrolysis

Cited by 23 publications

References 21 publications

Porous waxy maize starch

Porous waxy maize starch

Thermogravimetric and spectroscopic study (TG–DTA/FT–IR) of activated carbon from the renewable biomass source Babassu

Parâmetros de qualidade físico-química de óleos e análise morfométrica de frutos e sementes da espécie Orbignya phalerata Martius por região ecológica

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