Free radical scavenging capacity and antioxidant activity of cochineal (Dactylopius coccus C.) extracts

González, Evangelina A.; García, Elisa Mariana; Nazareno, Mónica A.

doi:10.1016/j.foodchem.2009.06.030

Cited by 35 publications

(21 citation statements)

References 16 publications

(21 reference statements)

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“…IR spectra were recorded on a Perkin-Elmer Spectrum One spectrometer using a KBr disc with ν max values given in inverse centimeters. NMR spectra were recorded on a Bruker Avance 600 spectrometer at room temperature ( 1 H, 600 MHz; 13 C, 150 MHz). The chemical shifts (δ) are reported in parts per million using tetramethylsilane as an internal standard, and the coupling constants (J) are given in hertz.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The sample (10 μL) was added to the reaction mixture described above, followed by the addition of 100 μL of a PMS solution [ 42. In addition to the carbon signals of the groups mentioned above, five additional quaternary carbon signals were observed in the 13 C NMR spectrum of compound 1 ( Table 1). The presence of two 1,4-disubstituted phenyls was confirmed by the H-2/C-3, C-4 and H-3/C-1, C-4 HMBC correlations, and the H-2″/C-1″, C-4″ and H-3″/C-1″, C-4″ HMBC correlations (Figure 2A).…”

Section: Journal Of Agricultural and Food Chemistrymentioning

confidence: 99%

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Isolation and Characterization of New p-Terphenyls with Antifungal, Antibacterial, and Antioxidant Activities from Halophilic Actinomycete Nocardiopsis gilva YIM 90087

Tian

Xiang

Luo

et al. 2013

J. Agric. Food Chem.

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A new p-terphenyl 1 and a novel p-terphenyl derivative 3 bearing a benzothiazole moiety were isolated from halophilic actinomycete Nocardiopsis gilva YIM 90087, along with known p-terphenyl 2, antibiotic novobiocin 4, cyclodipeptides 5−13, and aromatic acids 14 and 15. Their structures were elucidated on the basis of the interpretation of spectral data and by comparison of the corresponding data with those reported previously. The p-terphenyl 1 showed antifungal activity against the three pathogenic fungi, including Fusarium avenaceum, Fusarium graminearum, and Fusarium culmorum, that caused Fusarium head blight with minimal inhibitory concentrations (MICs) of 8, 16, and 128 μg/mL, respectively. Compound 1 showed antifungal activity against Candida albicans with a MIC of 32 μg/mL and antibacterial activity against Bacillus subtilis with a MIC of 64 μg/mL. Novobiocin 4 showed antifungal activity against Pyricularia oryzae with a MIC of 16 μg/mL and antibacterial activity against B. subtilis with a MIC of 16 μg/mL and Staphylococcus aureus with a MIC of 64 μg/mL. The 1,1-diphenyl-2-picrylhydrazyl assay suggested that 1, 3, and 4 exhibited 54.9% (2 mg/mL), 14.3% (4 mg/mL), and 47.7% (2 mg/mL) free radical scavenging activity, respectively. The positively charged 2,2′-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid radical (ABTS +• ) scavenging assay indicated that 1, 3, 4, and 8 exhibited 68.6% (1 mg/mL), 28.4% (2 mg/mL), 78.2% (0.5 mg/mL), and 54.6% (2 mg/mL) ABTS +• scavenging capacity, respectively. The superoxide anion radical scavenging assay suggested that 4 exhibited 77.9% superoxide anion radical scavenging capacity at 2 mg/mL. N. gilva YIM 90087 is a new resource for novobiocin 4.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: Journal Of Agricultural and Food Chemistrymentioning

confidence: 99%

Isolation and Characterization of New p-Terphenyls with Antifungal, Antibacterial, and Antioxidant Activities from Halophilic Actinomycete Nocardiopsis gilva YIM 90087

Tian

Xiang

Luo

et al. 2013

J. Agric. Food Chem.

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“…To improve the optical and electrical properties of cochineal, it was used as the reducing agent during the biosynthesis of silver nanoparticles (AgNPs) without submitting the cochineal to any kind of separation of its primary compounds. e cochineal extract was used as the reducing agent for the biosynthesis of AgNPs, since green synthesis of the AgNPs has been an easy, affordable, inexpensive technique and is potentially not harmful to human health and the environment [9][10][11][12][13][14]. Different volumes of cochineal dye (pH � 12, [5]) in 1 ml of AgNO 3 solution (10 mM, pH � 5.6) were analyzed with UV-Vis spectrometry, Commission Internationale de l'Eclairage (CIE) chromaticity diagram, cyclic voltammetry (CV), scanning transmission electron microscopy (STEM), energy dispersive X-ray spectroscopy (EDS), dynamic light scattering (DLS), and X-ray diffraction (XRD).…”

Section: Introductionmentioning

confidence: 99%

Improvement of Cochineal Extract (Dactylopius coccus Costa) Properties Based on the Green Synthesis of Silver Nanoparticles for Application in Organic Devices

Stael

Parra-Cruz

Naranjo

et al. 2018

Journal of Nanotechnology

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e UV-Vis absorption and conductivity properties of the organic sample cochineal (Dactylopius coccus Costa) were modified by using it as a reducing agent in the biosynthesis of silver nanoparticles. is was done in a straightforward way in order to allow its possible application in organic devices. e biosynthesized solution exhibited a hybrid material with a UV-Vis absorbance range from 205 to 650 nm. e sizes of silver nanoparticles of the hybrid material were between 5 and 10 nm. X-ray diffraction (XRD) revealed silver structures, when samples were dried at 100°C. At 40°C, the structures detected were chlorargyrite (AgCl) and silver oxide (Ag 2 O). e nucleation and subsequent growth of the hybrid thin film on the substrates indicated an increase of clusters and roughness in comparison to thin films made solely from cochineal. e thin films of hybrid materials showed an improvement of 40% in their electrical potential. e stability at room temperature demonstrated that the hybrid material could be useful as a potential candidate for photoactive thin films in organic devices.

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“…The DPPH scavenging assay was determined using a method reported previously [21], and the ABTS scavenging assay according to the method described by González et al [22]. Vitamin C was used as a positive control.…”

Section: Antioxidant Assaysmentioning

confidence: 99%

Antioxidant compounds from ethanol extracts of bamboo (Neosinocalamus affinis) leaves

Luo¹,

Luo²,

Zhou³

et al. 2014

Journal of Asian Natural Products Research

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Free radical scavenging capacity and antioxidant activity of cochineal (Dactylopius coccus C.) extracts

Cited by 35 publications

References 16 publications

Isolation and Characterization of New p-Terphenyls with Antifungal, Antibacterial, and Antioxidant Activities from Halophilic Actinomycete Nocardiopsis gilva YIM 90087

Isolation and Characterization of New p-Terphenyls with Antifungal, Antibacterial, and Antioxidant Activities from Halophilic Actinomycete Nocardiopsis gilva YIM 90087

Improvement of Cochineal Extract (Dactylopius coccus Costa) Properties Based on the Green Synthesis of Silver Nanoparticles for Application in Organic Devices

Antioxidant compounds from ethanol extracts of bamboo (Neosinocalamus affinis) leaves

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