Characterization and applications of a new composite material obtained by green synthesis, through deposition of zinc oxide onto calcium carbonate precipitated in green seaweeds extract

Dumbravă, Anca; Berger, Daniela; Matei, Cristian; Radu, Marius; Gheorghe, Emma

doi:10.1016/j.ceramint.2017.12.084

Cited by 20 publications

(7 citation statements)

References 39 publications

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“…las vibraciones con una frecuencia en el rango de 700-900 cm -1 corresponden principalmente a los modos vibracionales bending (I) de los iones de carbonato. Las frecuencias por encima de 1000 cm -1 corresponden a los modos stretching (I) del carbonato (22,23), que son los modos principales en estas muestras.…”

Section: Discussionunclassified

Caracterización óptica, química y nuclear del ónix mexicano (CaCO3), correspondiente a la zona del semidesierto Zacatecano

Marquez-Mata¹,

Vega‐Carrillo²,

Chávez³

et al. 2019

RCS

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En este trabajo se presentan algunos rasgos principales del Ónix mexicano, así como la determinación de las características de las 6 muestras procedentes del semi-desierto zacatecano correspondiente al municipio de Mazapil, las cuales se clasifican de acuerdo con su color representativo: Amarillo, Azul, Café, Naranja, Rojo y Verde. Las técnicas de caracterización estudiadas son: Espectroscopia de Energía Dispersa de Fluorescencia de Rayos X, Espectrometría Ultravioleta Visible y Espectroscopia Infrarroja. Con dichas técnicas se pudo estudiar las características químicas, físicas y ópticas del Ónix Mexicano; de donde se obtuvo la composición elemental, los picos de absorción, la estructura cristalina, los modos vibraciones y el ancho de banda (band gap) óptico. Al igual que se estudió las interacciones de estos materiales con la radiación. De este último estudio se obtuvo el coeficiente de interacción másico para la dispersión coherente e incoherente, el efecto fotoeléctrico, la dispersión Compton y producción de pares, en el núcleo y en el campo de electrones, al igual que el coeficiente de atenuación másico total y lineal total para las 6 muestras, esto con el fin de determinar su capacidad como blindaje.

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Section: Discussionunclassified

Caracterización óptica, química y nuclear del ónix mexicano (CaCO3), correspondiente a la zona del semidesierto Zacatecano

Marquez-Mata¹,

Vega‐Carrillo²,

Chávez³

et al. 2019

RCS

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“…The macroalgae were gently washed with tap water to remove sand and epibionts (Dumbrava et al, 2018; In Hae et al, 2007). They were subsequently dried in a dryer—Klimatechnik dehydrator at 45 °C until constant weight was achieved.…”

Section: Methodsmentioning

confidence: 99%

Phytochemical screening and antibacterial assessment of two macroalgae Ulva papenfussi and Ulva nematoidea (Chlorophyta) against the bacterium Vibrio parahaemolyticus

Cárdenas

Pérez

Ordinola

et al. 2023

Food sci. technol. int.

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This study was conducted to determine whether the macroalgae Ulva papenfussi and Ulva nematoidea could be alternatives for preventing Litopenaeus vannamei vibriosis caused by the bacterium Vibrio parahaemolyticus. Phytochemical screening was performed on methanolic extracts to qualitatively determine the main groups of bioactive compounds, previous to an in vitro antibacterial test against V. parahaemolitycus. Phenols, polyphenols, flavonoids, and the high presence of carbohydrates were found in both macroalgae. U. papenfussi showed more presence of lipids and alkaloids than U. nematoidea . Macroalgae extracts prepared (v:v) with a 1:1 methanol: dichloromethane solvent was used for the in vitro test using the disc diffusion method (MDD). Filter paper discs impregnated with 1.0, 1.5, 2.0, 3.0, and 4.0 mg of the extracts showed antibacterial activity against V. Parahaemolitycus in a dose-dependent manner in both macroalgae. The inhibition zone varied significantly ( p < 0.05) from 8.33 ± 0.12 to 11.41 ± 0.73 mm for 1 to 3 mg of extract levels, respectively. In conclusion, both macroalgae have antibacterial activity in their crude extracts against this bacteria. It is suggested to evaluate it as a feed additive for L. vannamei. This study is the first report on a phytochemical screening and antibacterial activity of these macroalgae against V. parahaemolyticus.

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“…The polymolecularity was due to linear xyloglucan structure of ulvans [24,25]. Ulvan extracted from U. lactuca contains polysaccharides that can be used as natural fibers or matrix; they can also be modified for other purposes, including as part of a composite [26]. Ulvan is also used as a substitute for Avicel, a polymer that contains cellulose.…”

Section: Extractionmentioning

confidence: 99%

Ulvan, a Polysaccharide from Macroalga Ulva sp.: A Review of Chemistry, Biological Activities and Potential for Food and Biomedical Applications

et al. 2020

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The species of green macroalga belonging to the genus Ulva (family: Ulvaceae) are utilized in various fields, from food supplements to biomedical applications. Ulvan, a polysaccharide obtained from various Ulva species, has shown various biological activities, including antioxidant, anti-inflammatory, anticancer, antibacterial, and antiviral activities. To obtain the polysaccharide ulvan that can be utilized in various fields, it is necessary to understand the critical points that affect its physicochemical nature, the extraction procedures, and the mechanism of action for biological activities. This article discusses the physicochemical properties, extraction, isolation and characterization procedures and benefits in food and biomedical applications of ulvan. In conclusion, ulvan from Ulva sp. has the potential to be used as a therapeutic agent and also as an additional ingredient in the development of tissue engineering procedures.

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Characterization and applications of a new composite material obtained by green synthesis, through deposition of zinc oxide onto calcium carbonate precipitated in green seaweeds extract

Cited by 20 publications

References 39 publications

Caracterización óptica, química y nuclear del ónix mexicano (CaCO3), correspondiente a la zona del semidesierto Zacatecano

Caracterización óptica, química y nuclear del ónix mexicano (CaCO3), correspondiente a la zona del semidesierto Zacatecano

Phytochemical screening and antibacterial assessment of two macroalgae Ulva papenfussi and Ulva nematoidea (Chlorophyta) against the bacterium Vibrio parahaemolyticus

Ulvan, a Polysaccharide from Macroalga Ulva sp.: A Review of Chemistry, Biological Activities and Potential for Food and Biomedical Applications

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