Cromatografando em coluna com resina de almécega: um projeto para química orgânica experimental

Júnior, Gerardo Magela Vieira; Carvalho, Adonias Almeida; Gonzaga, Wellington de Abreu; Chaves, Mariana Helena

doi:10.1590/s0100-40422007000200044

Cited by 4 publications

(6 citation statements)

References 5 publications

(5 reference statements)

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“…Marchand belongs to the family Burseraceae and is popularly known by the name of “Breu Branco”. It is found in the Amazon rainforest and exploited commercially for the commercial value of wood, or by producing an oleoresin exudate rich in volatile substances, which are used for various purposes, including as a natural insect repellent [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Larvicide Activity on Aedes aegypti of Essential Oil Nanoemulsion from the Protium heptaphyllum Resin

et al. 2020

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The aim of this work was to prepare a nanoemulsion containing the essential oil of Protium heptaphyllum resin and to evaluate the larvicidal activity and the residual larvicidal effect against Aedes aegypti. The essential oil was identified by gas chromatography coupled to a mass spectrometer, and the nanoemulsions were prepared using a low-energy method and characterized by photon correlation spectroscopy. The results indicated the major constituents as p-cimene (27.70%) and α-Pinene (22.31%). Nanoemulsions had kinetic stability and a monomodal distribution in a hydrophilic-lipophilic balance of 14 with particle diameters of 115.56 ± 1.68 nn and zeta potential of −29.63 ± 3.46 mV. The nanoemulsion showed larvicidal action with LC50 = 2.91 µg∙mL−1 and residual larvicidal effect for 72 h after application to A. aegypti larvae. Consequently, the nanobiotechnological product derived from the essential oil of P. heptaphyllum resin could be used against infectious disease vectors.

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Section: Introductionmentioning

confidence: 99%

Larvicide Activity on Aedes aegypti of Essential Oil Nanoemulsion from the Protium heptaphyllum Resin

et al. 2020

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“…O esqualeno, 9 fitol, 10 17 Este espectro apresentou ainda, entre outros sinais, um simpleto em 3,62 referente aos hidrogênios metoxílicos, confirmando a ocorrência da reação de metilação. O espectro de RMN 13 C apresentou sinais de carbonos metoxílico ( 51,5) e carbonílico ( 178,1) de éster, de carbono oximetínico ( 79,0, C-3), além de dois pares de sinais em 125,6/138,1 e 122,3/144,0 atribuídos aos carbonos olefínicos C-12 e C-13 nos esqueletos triterpênicos ursano e oleanano, respectivamente.…”

Section: Resultsunclassified

químicos das folhas de Qualea grandiflora: atribuição dos dados de RMN de dois flavonóides glicosilados acilados diastereoisoméricos

Ayres¹,

Escórcio²,

Costa³

et al. 2008

Quím. Nova

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and oleanolic acids. The structures of the compounds were identified by 1D-and 2D-NMR experiments, mass and UV spectrometry and comparison with literature data.Keywords: Qualea grandiflora; Vochysiaceae; acylated kaempferol glycosids. INTRODUÇÃOQualea grandiflora Mart. (Vochysiaceae) é uma planta de ocorrência em mata de galeria, cerrado e cerradão, considerada símbolo dos cerrados.1 É conhecida popularmente como pau-terra, pau-terra-do-campo, pau-terra-do-cerrado, pau-terra-da-folha-larga, ariavá, entre outros. 2 As cascas e folhas são medicinais e os frutos dão matéria tintorial amarela.2 Infusão ou decocção das folhas de Q. grandiflora são usadas no tratamento de diarréia com sangue, cólicas intestinais e contra ameba.3 As cascas são usadas, na forma de infusão, para limpeza externa de úlceras e feridas e no tratamento de doenças inflamatórias.

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“…Part of this extract (3.5 g) was subjected to column chromatography on silica gel using hexane, chloroform, ethyl acetate and methanol, alone or in binary mixture. It started with 100 % of hexane and then the polarity was varied in a proportion of 10 to 10 % [32] . The fractions obtained were monitored by thin layer chromatography and pooled according to a similar chromatographic profile.…”

Section: Methodsmentioning

confidence: 99%

“…It started with 100 % of hexane and then the polarity was varied in a proportion of 10 to 10 %. [32] The fractions obtained were monitored by thin layer chromatography and pooled according to a similar chromatographic profile. Two fractions were analyzed (A and B).…”

Section: Extraction and Characterizationmentioning

confidence: 99%

“…Thus, extract fractions were obtained by classical column chromatography using hexane, chloroform, ethyl acetate and methanol as mobile phase. [32] Chromatoplates were used for TLC analyses, which was eluted in a binary solvent mixture and analyzed in a UV chamber at wavelengths of 254 and 365 nm. [33] GC/MS analyses were performed on a Shimadzu® GC (Model 2010) interfaced with a Shimadzu QP 2010 Ultra MS operating in the electron impact ionization mode (70 eV), using the following chromatographic conditions: Phenomenex® column ZB5MS Zebron column (30.0 m × 0.25 mm × 0.25 mm); helium gas (99.9 %) at a constant flow rate of 1.1 mL/min; injection volume of 1.0 μL; 1 : 40 injector split; injector temperature of 240 °C; ion source temperature of 280 °C.…”

Section: Generalmentioning

confidence: 99%

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Phytochemical Characterization of Cannabis sativa L. Roots from Northeastern Brazil

Neto

Nery

Lima

et al. 2023

Chemistry & Biodiversity

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This article describes the phytochemical study of Cannabis sativa roots from northeastern Brazil. The dried plant material was pulverized and subjected to exhaustive maceration with ethanol at room temperature, obtaining the crude ethanolic extract (Cs-EEBR). The volatile compounds were analyzed by gas chromatography coupled with mass spectrometry (GC/MS), which allowed to identify 22 compounds by comparing the linear retention index (LRI), the similarity index (SI) and the fragmentation pattern of the constituents with the literature. By this technique the major compounds identified were: friedelan-3-one and β-sitosterol. In addition, two fractions were obtained from Cs-EEBR by classical column chromatography and preparative thin layer chromatography. These fractions were analyzed by NMR and IR and together with the mass spectrometry data allowed to identify the compounds: epifriedelanol, friedelan-3-one, β-sitosterol and stigmasterol. The study contributed to the phytochemical knowledge of Cannabis sativa, specifically the roots, as there are few reports on the chemical constituents of this part of the plant.

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Cromatografando em coluna com resina de almécega: um projeto para química orgânica experimental

Cited by 4 publications

References 5 publications

Larvicide Activity on Aedes aegypti of Essential Oil Nanoemulsion from the Protium heptaphyllum Resin

Larvicide Activity on Aedes aegypti of Essential Oil Nanoemulsion from the Protium heptaphyllum Resin

químicos das folhas de Qualea grandiflora: atribuição dos dados de RMN de dois flavonóides glicosilados acilados diastereoisoméricos

Phytochemical Characterization of Cannabis sativa L. Roots from Northeastern Brazil

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