Vibrational spectroscopic calculations on pyrogallol and gallic acid

Mohammed-Ziegler, Ildikó; Billes, Ferenc

doi:10.1016/s0166-1280(02)00547-x

Cited by 131 publications

(96 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…He et al (2011) who worked with collagen films containing procyanidins also reported that band broadening at amide A, amide I and II of film spectra suggested H bond formation between the collagen and the phenolic compound. On the other hand, band shifting at amide A towards lower wavenumbers could also indicate the hydrogen bond formation (Hasni et al, 2011;Mohammed-Ziegler & Billes, 2002). In this study, the peak point of amide A region at 3288 cm −1 for the control film shifted down to 3287, 3286, and 3285 cm −1 with the addition of catechin at 1.5, 3.0, and 4.5 mg/cm 2 , respectively.…”

Section: Mechanical Properties Of Filmsmentioning

confidence: 43%

“…3A, B, and C shows that the bandwidth of the amide A, I, and II regions broadened as the catechin concentration in the film structure increased. In the literature, there are increasing number of reports that the broadening of amide A, I and II bands at the indicated regions was due to hydrogen bond formation between protein and phenolic compounds (Alkan et al, 2011;He et al, 2011;Mohammed-Ziegler & Billes, 2002;Zou, Li, Percival, Bonard, & Gu, 2012). Zou et al (2012) who investigated the interactions of zein with procyanidins attributed the band broadening in amide I and II regions to hydrogen bond formation between zein and the phenolic compounds.…”

Section: Mechanical Properties Of Filmsmentioning

confidence: 99%

See 1 more Smart Citation

Development of flexible zein–wax composite and zein–fatty acid blend films for controlled release of lysozyme

Arcan

Yemenicioğlu

2013

Food Research International

View full text Add to dashboard Cite

The aim of this study was controlled release of lysozyme by modification of hydrophobicity and morphology of zein films using composite and blend film making methods. The incorporation of beeswax, carnauba or candelilla wax into films at 5% (w/w) of zein gave composite films containing amorphous wax particles, while incorporation of oleic acid into film at 5% of zein caused formation of blend films containing many spherical zein capsules within their matrix. The lysozyme release rates of composites reduced as the melting point of waxes increased. The composites and blends showed 2.5 to 17 fold lower lysozyme release rates than controls. The films were effectively plasticized by using catechin. The catechin also provided antioxidant activity of films (up to 69 μmol Trolox/cm 2 ) and contributed to their controlled release properties by reducing film porosity. The films showed antimicrobial activity against Listeria innocua. This work showed the possibility of obtaining advanced edible films having flexibility, antimicrobial and antioxidant activity and controlled release properties.

show abstract

Section: Mechanical Properties Of Filmsmentioning

confidence: 43%

Section: Mechanical Properties Of Filmsmentioning

confidence: 99%

Development of flexible zein–wax composite and zein–fatty acid blend films for controlled release of lysozyme

Arcan

Yemenicioğlu

2013

Food Research International

View full text Add to dashboard Cite

show abstract

“…The above data are consistent with the vibration spectrum of pyrogallol published earlier. 28 The FT-IR spectra of co-precipitated hydroxy phenols in the presence of iron oxy-hydroxide are also shown in Fig 4. It is interesting to note that bands in the region of 3450-3650 cm −1 ascribed to surface hydroxyls are absent. Also, there is no splitting of the broad band in the region of 3200-3500 cm −1 observed in the spectra of pure hydroxy phenols.…”

Section: Interaction Of Hydroxy Phenols With Iron Oxy-hydroxidesmentioning

confidence: 99%

Removal of tannins and polyhydroxy phenols by electro‐chemical techniques

Murugananthan

Raju

Prabhakar

2005

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

The removal of tannins and their basic molecules such as catechol, pyrogallol, phloroglucinol and resorcinol was studied by electro-flotation and electro-oxidation techniques. Iron rods and triple oxide (TaO 2 /RuO 2 /IrO 2 ) coated titanium rods were used as electrodes for electro-flotation and electrooxidation respectively. Interaction of tannins and polyhydroxy phenols with iron oxy-hydroxide formed by anodic dissolution of iron was studied by UV-Visible, FT-IR and zeta-potential measurements. GC-MS was used to identify the intermediate compounds formed during electro-oxidation. Catechol, pyrogallol, phloroglucinol and resorcinol were found to be mineralized in the presence of triple oxide (TaO 2 /RuO 2 /IrO 2 ) coated titanium electrodes. Catechol and pyrogallol were found to form insoluble organo-metal complexes while resorcinol and phloroglucinol were found to adsorb on iron oxy-hydroxide. The sludge thus formed was simultaneously separated from the aqueous phase by hydrogen bubbles. It was observed that the power consumption is relatively high for electro-oxidation compared with electroflotation. The effects of pH and reaction time on their removal were also studied and the results are discussed.

show abstract

“…Intensity modifications were also observed for bands at lower wave numbers: 1230-1260 cm -1 for HA and 1030-910 cm -1 for humin treated with Hg(II) ions. The latter band can be attributed to the stretching of C-O in the C-O-H groups, although closer structure assignments were difficult due to the mixing of different vibrational modes (Mohamed-Ziegler and Billes, 2002) and to the broadness of the bands.…”

Section: Humic Substances Characterizationmentioning

confidence: 99%

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

Tinti¹,

Tugnoli²,

Bonora³

et al. 2015

j. cent. eur. agric.

191

View full text Add to dashboard Cite

The present review highlights the recent applications of mid-infrared spectroscopy and in particular of diffuse reflectance spectroscopy (DRIFT) and attenuated total reflectance (ATR) and processing methods (e.g., deconvolution, derivative and chemometrics) to rapidly provide valuable information on soil composition and organic geochemistry. Research has demonstrated that both DRIFT and ATR techniques can be considered useful tools for the analysis of a large number of soil samples, giving not only typical spectral patterns but permitting an accurate prediction of quantitative parameters such as, e.g., total carbon, total nitrogen, C/N ratio, lignin, dissolved OC, carbonyl-C, aromatic-C, O-alkyl-C, and alkyl-C contents. Based on literature results, infrared spectroscopy can be recognized as one of the most promising analytical techniques for investigating soil science.

show abstract

Vibrational spectroscopic calculations on pyrogallol and gallic acid

Cited by 131 publications

References 14 publications

Development of flexible zein–wax composite and zein–fatty acid blend films for controlled release of lysozyme

Development of flexible zein–wax composite and zein–fatty acid blend films for controlled release of lysozyme

Removal of tannins and polyhydroxy phenols by electro‐chemical techniques

Recent applications of vibrational mid-Infrared (IR) spectroscopy for studying soil components: a review

Contact Info

Product

Resources

About