Fouling behavior of aqueous solutions of polyphenolic compounds during ultrafiltration

Susanto, Heru; Yu, Feng; Ulbricht, Mathias

doi:10.1016/j.jfoodeng.2008.09.011

Cited by 136 publications

(67 citation statements)

References 28 publications

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“…In spite of that, this interval is also important for the identification of phenolic compounds, alcohols and carboxylic groups and also the hydrogen vibration of amide N-H groups (Susanto, Feng, & Ulbricht, 2009). …”

Section: Resultsmentioning

confidence: 99%

Application of FTIR-ATR spectroscopy on the bee pollen characterization

Anjos¹,

Santos²,

Dias

et al. 2017

Journal of Apicultural Research

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Bee pollen contains almost all nutrients required by the human organism as well as diverse health-promoting substances. However, its composition and nutritional value greatly depend on the botanical origin. As such, it is important to develop a rapid and non-expensive methodology that allows studying its characteristics, making labelling more objective and easier. The FTIR-ATR technique was used to predict some nutritional parameters in 126 bee pollen samples. FTIR-ATR spectrum obtained in the region between 4000 and 400 cm −1 with PLS Regression models were used to correlate spectral information with the data obtained using reference methods. In this first approach with pollen samples, good correlation models with appropriate accuracy were obtained for the evaluated parameters with r 2 varying from 74.8 to 97% and residual prediction deviation between 2.0 and 5.8. These results suggest that FTIR-ATR may be a useful technique for assessing bee pollen's composition.Aplicació n de la espectroscopía FTIR-ATR a la caracterizació n del polen de abeja El polen de abeja contiene casi todos los nutrientes requeridos por el organismo humano, así como diversas sustancias promotoras de la salud. Sin embargo, su composició n y valor nutricional dependen en gran medida del origen botánico. Como tal, es importante desarrollar una metodología rápida y econó mica que permita estudiar sus características, haciendo el etiquetado más objetivo y más fácil. La técnica FTIR-ATR se utilizó para predecir algunos parámetros nutricionales en 126 muestras de polen de abeja. Se utilizó el espectro FTIR-ATR obtenido en la regió n entre 4000 y 400 cm-1 con modelos de regresió n PLS para correlacionar informació n espectral con los datos obtenidos usando métodos de referencia. En este primer abordaje con muestras de polen, se obtuvieron buenos modelos de correlació n con una precisió n adecuada para los parámetros evaluados con r2 variando de 74,8% a 97% y una desviació n de predicció n residual entre 2,0 y 5,8. Estos resultados sugieren que el FTIR-ATR puede ser una técnica útil para evaluar la composició n del polen de abeja.

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Section: Resultsmentioning

confidence: 99%

Application of FTIR-ATR spectroscopy on the bee pollen characterization

Anjos¹,

Santos²,

Dias

et al. 2017

Journal of Apicultural Research

View full text Add to dashboard Cite

show abstract

“…The peak at 1619-1638 cm À1 corresponds to C¼C groups or aromatic rings of polyphenols [41,44] or carbonyl groups [44]. The peak at 3407-3433 cm À1 corresponds to OH group of polyphenols [39]. Results suggest that the biomolecules of S. cumini LE and SE involved in the GNP synthesis are largely polyphenols.…”

Section: Ftir Analysis Identified Gnp-associated Moleculesmentioning

confidence: 89%

“…The peaks at 1000-1200 cm À1 correspond to C-O/C-OH single bonds of alcohols [39,40] and phenols [41]. The absorbance peak at 1055-1066 cm À1 corresponds to C-N stretching vibration of aliphatic amines or to alcohols/phenols [22].…”

Section: Ftir Analysis Identified Gnp-associated Moleculesmentioning

confidence: 99%

Characterisation of gold nanoparticles synthesised by leaf and seed extract ofSyzygium cuminiL.

Kumar

Yadav

2012

Journal of Experimental Nanoscience

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Here, Syzygium cumini leaf extract (LE) and seed extract (SE) were explored for the synthesis of gold nanoparticles (GNP). LE and SE as well as their polar (water) fractions showed potential for GNP synthesis. Comparative synthesis kinetics and morphological characterisation studies revealed the synthesis of smaller sized GNP by LE than SE. Only polar (water) fractions showed potential for GNP synthesis, which are smaller in size compared to their respective extracts. SE contained more polyphenols and biochemical constituents than LE and therefore, showed higher synthesis rate and bigger sized GNP. Atomic force microscope and scanning electron microscope analysis indicated that both extracts and their fractions catalysed the synthesis of spherical GNP. The average size of GNP synthesised by LE, leaf water fraction (LWF), SE and seed water fraction (SWF) were 24, 23, 35 and 32 nm, respectively. Fourier transform infrared analysis identified the biomolecules involved in the synthesis and stability of GNP. This study documented the potential of S. cumini for the synthesis of GNP in addition to silver nanoparticles (SNP). However, nature and types of polyphenols involved in GNP synthesis seem to be different from that involved in SNP synthesis. This might be the possible reason for smaller sized GNP that SNP.

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“…As shown in Fig. 5a, FTIR spectrum of seaweed shows -1 could be due to O-H group in polyphenols or proteins/enzymes or polysaccharide (Song et al 2009;Li et al 2007;Susanto et al 2009). A small peak observed at 2,931 cm -1 is due to CH-stretching of alkanes.…”

Section: Functional Group Analysismentioning

confidence: 91%

Biosynthesis of silver nanoparticles from the marine seaweed Sargassum wightii and their antibacterial activity against some human pathogens

et al. 2013

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In this paper, we have reported on biological synthesis of nano-sized silver and its antibacterial activity against human pathogens. The nanoparticles of silver were formed by the reduction of silver nitrate to aqueous silver metal ions during exposure to the extract of marine seaweed Sargassum wightii. The optical properties of the obtained silver nanoparticles were characterized using UV-visible absorption and room temperature photoluminescence. The X-ray diffraction results reveal that the synthesized silver nanoparticles are in the cubic phase. The existence of functional groups was identified using Fourier transform infrared spectroscopy. The morphology and size of the synthesized particles were studied with atomic force microscope and highresolution transmission electron microscope measurements. The synthesized nanoparticles have an effective antibacterial activity against S. aureus, K. pneumoniae, and S. typhi.

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Fouling behavior of aqueous solutions of polyphenolic compounds during ultrafiltration

Cited by 136 publications

References 28 publications

Application of FTIR-ATR spectroscopy on the bee pollen characterization

Application of FTIR-ATR spectroscopy on the bee pollen characterization

Characterisation of gold nanoparticles synthesised by leaf and seed extract ofSyzygium cuminiL.

Biosynthesis of silver nanoparticles from the marine seaweed Sargassum wightii and their antibacterial activity against some human pathogens

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