Physical and chemical characteristics of Maytenus rigida in different particle sizes using SEM/EDS, TG/DTA and pyrolysis GC–MS

Correia, Lidiane Pinto; Santana, Cleildo P.; Silva, Karla Monik Alves da; Júnior, Fernando José de Lima Ramos; Lima, Rosemary Sousa Cunha; Souza, Fábio Santos de; Medeiros, Ana Cláudia Dantas de; Macêdo, Rui Oliveira

doi:10.1007/s10973-016-5999-0

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…The first exothermic decomposition stage is in the temperature range of 200-380°C and the second exothermic decomposition is in the temperature range of 380-500°C. These exothermic regions have an agreement with the results reported by Correia et al (2018) for the DTA analysis of Maytenus rigida in a nitrogen atmosphere. The DTA exothermic peaks for the biomass is also in agreement with the exothermic peaks for different kinds of wood for the analysis in a nitrogen atmosphere reported Bryś et al (2016).…”

Section: Thermogravimetric Analysessupporting

confidence: 91%

Torrefaction Characteristics of Japanese Cedar Sawdust with a Mechanical Compression in Air Atmosphere

Fernanda

Kawahara

Higashi

et al. 2019

J. Chem. Eng. Japan

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In this study, biochars were prepared from Japanese cedar sawdust with a mechanical compression at di erent temperatures in an air atmosphere. The compression pressure at a given constant value was applied to the raw material during the torrefaction process. Experimental results indicated that the compression positively improved the fuel properties of the biochar obtained. The carbon content in biochar increased; whereas the oxygen and hydrogen contents decreased. The H/C ratio of biochar was generally proportional to its O/C ratio, and biochars prepared at temperatures of more than 300°C were in proximity to bituminous or sub-bituminous coals in the van Krevelen diagram. Torrefaction at 300°C and 3 MPa gave biochar with a higher heating value of 29.8 MJ/kg and an energy yield of 0.85. Furthermore, the di erential thermal analyses showed that the peaks corresponding to the release of volatile matters from biochar decreased with an increase in the compressive load. Consequently, torrefaction of Japanese cedar sawdust with compression in an air atmosphere would be a promising method to produce biochars as an alternative fuel.

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Section: Thermogravimetric Analysessupporting

confidence: 91%

Torrefaction Characteristics of Japanese Cedar Sawdust with a Mechanical Compression in Air Atmosphere

Fernanda

Kawahara

Higashi

et al. 2019

J. Chem. Eng. Japan

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“…At 8000x larger but few particles with irregular size and shape and rough surfaces were detected, nanocrevices were easily noticed. EDS inspects the X-rays produced after interaction between electron and sample powder to give estimation of the elemental composition of the sample (Correia et al, 2018;Shadman et al, 2018). Fig.…”

Section: Proximate Analysis Of Rs Seed Powdermentioning

confidence: 99%

“…The characterization of plant material, aiming safety and nutritional worth, is important to attain a phyto therapeutic product meeting quality criteria (Correia et al, 2018). Analytical methodologies, based on different principles, have been adopted for evaluation of plant drugs to establish their effective use in different pharmaceutical preparations.…”

Section: Introductionmentioning

confidence: 99%

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2021

Pak. J. Pharm. Sci

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Raphanus sativus L. (Brassicacae) possesses numerous health benefits due to presence of a host of secondary metabolites in its various parts. The present study investigated the nutritive value of Raphanus sativus (RS) seeds and seed oil. Proximate and physico chemical analysis were carried out by official AOAC (Association of Official Analytical Chemists) and AOCS (American oil chemist society) methods. Scanning electron microscopy (SEM) together with energy dispersive X-ray spectroscopy (EDS) described the surface morphology along with atomic elemental composition of the sample. Mineral contents were evaluated by Atomic absorption spectroscopy. Moisture content was 8.67±0.08% whereas protein, crude fiber, crude fat, carbohydrates, total ash values were reported as 20.13±0.15%, 7.86±0.15%, 32.27±0.25%, 27.32±0.85%, 3.75±0.02% respectively. EDS determined carbon, oxygen, magnesium, sulfur and potassium in seeds. All physico-chemical properties varied insignificantly for the two extraction methods, except for acid value and unsaponifiable matter, which were higher for Soxhlet's extracted oil than cold pressed oil. The mineral composition revealed potassium in the highest concentrations in seeds and seed oil i.e.1660.65±69.26 ppm and 47.80 ± 7.02 ppm respectively. The study suggested that the seed and seed oil could be a potential source of naturally originated raw material for the nutritive and pharmaceutical aid.

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“…The thermoanalytical techniques can overcome most of these issues, because it is fast, requires minute sample amounts, and can be considered a green technique. Also, to the best of our knowledge, few studies employed thermoanalytical techniques in the characterization of plants dried leaves as a fingerprint method to identify samples [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermoanalytical and spectroscopic characteristics of young and old leaves powder and methanolic extracts of Niedenzuella multiglandulosa

Mannochio-Russo

Nunes

Bolzani

et al. 2018

J Therm Anal Calorim

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Niedenzuella multiglandulosa is a plant species known for having high toxicity and to cause death in cattle and sheep, promoting economic losses in Brazilian trade balance difficult to estimate. This work aims to evaluate the potential of thermoanalytical techniques (TG-DSC, TG-FTIR) and FTIR to identify compositional differences between the powder samples and methanolic extracts of young and old leaves. The TG-DSC profile for young and old leaves powder and extract presented some differences, mainly in the fourth mass loss step, that was attributed to the greater content of tannins in old leaves as also evidenced by FTIR. The cyclic DSC and TG curves showed that the leaves samples are highly hygroscopic, adsorbing water vapor even from the controlled humidity atmosphere. This characteristic thermal behavior can be useful for sample identification and characterization. Keywords Niedenzuella multiglandulosa Á Thermal analysis Á Evolved gas analysis Á Natural products

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Physical and chemical characteristics of Maytenus rigida in different particle sizes using SEM/EDS, TG/DTA and pyrolysis GC–MS

Cited by 10 publications

References 15 publications

Torrefaction Characteristics of Japanese Cedar Sawdust with a Mechanical Compression in Air Atmosphere

Torrefaction Characteristics of Japanese Cedar Sawdust with a Mechanical Compression in Air Atmosphere

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Thermoanalytical and spectroscopic characteristics of young and old leaves powder and methanolic extracts of Niedenzuella multiglandulosa

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