Spektroskopische Daten zur Strukturaufklärung organischer Verbindungen

Pretsch, Ernö; Bühlmann, Philippe; Affolter, Christian; Badertscher, Martin

doi:10.1007/978-3-662-09972-8

Cited by 43 publications

(45 citation statements)

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“…The spectrum for glycerol (Figure 3a) shows the typical bands for alcohols, with the 217 stretching absorption associated with the hydroxyl groups (-OH) in the 3600-3000 cm , respectively (Pretsch, 2001). 225…”

Section: Raw Materials 213mentioning

confidence: 99%

Structure and mechanical properties of sodium and calcium caseinate edible active films with carvacrol

Arrieta

Peltzer

Garrigós

et al. 2013

Journal of Food Engineering

170

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Please cite this article as: Arrieta, M.P., Peltzer, M.A., Garrigós, a.d.C., Jiménez, A., Structure and mechanical properties of sodium and calcium caseinate edible active films with carvacrol, Journal of Food Engineering (2012), doi: http://dx.doi.org/10. 1016/j.jfoodeng.2012.09.002 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract: 17Edible active films based on sodium caseinate (SC) and calcium caseinate (CC) 18 plasticized with glycerol (G) at three different concentrations and carvacrol (CRV) as 19 active agent were prepared by solvent casting. Transparent films were obtained and 20 their surfaces were analysed by optical microscopy and scanning electron microscopy 21 (SEM). The influence of the addition of three different plasticizer concentrations was 22 studied by determining tensile properties, while Fourier transformed infrared 23 spectroscopy (FTIR) and thermogravimetic analysis (TGA) were used to evaluate the 24 structural and thermal behaviour of such films. The addition of glycerol resulted in a 25 reduction in the elastic modulus and tensile strength, while some increase in the 26 elongation at break was observed. In general terms, SC films showed flexibility higher 27 than the corresponding CC counterparts. In addition, the presence of carvacrol caused 28 further improvements in ductile properties suggesting the presence of stronger 29 interactions between the protein matrix and glycerol, as it was also observed in thermal 30 degradation studies. FTIR spectra of all films showed the characteristic bands and 31 peaks corresponding to proteins as well as to primary and secondary alcohols. In 32 summary, the best results regarding mechanical and structural properties for 33caseinates-based films containing carvacrol were found for the formulations with high 34 glycerol concentrations. 35 36

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Section: Raw Materials 213mentioning

confidence: 99%

Structure and mechanical properties of sodium and calcium caseinate edible active films with carvacrol

Arrieta

Peltzer

Garrigós

et al. 2013

Journal of Food Engineering

170

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“…The EI mass spectrum of 1 showed an ion peak at m/z 264, and the molecular formula C 15 C NMR spectrum was consistent with two keto groups (d C = 200.0 and 218.4 ppm), a carboxylic acid unit (d C = 175.8 ppm), a fully substituted double bond (d C = 135.0 and 155.8 ppm), and a quaternary carbon atom (d C = 59.9 ppm). [12] Additionally, HSQC and APT NMR spectroscopic data provided the assignment of four methylene (d C = 23.3, 26.4, 34.5, and 37.8 ppm) and two methine (d C = 36.2 and 49.0 ppm) groups, which were mapped by 1 H, 1 H-COSY correlation and HMBC correlations to two fragments. Methylation of 1 with diazomethane afforded ester 4 a, which confirmed the presence of the carboxylic acid group (Scheme 2).…”

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confidence: 99%

Spirodionic Acid, a Novel Metabolite from Streptomyces sp., Part 1: Structure Elucidation and Diels–Alder‐Type Biosynthesis

Textor¹,

Papastavrou²,

Siewert³

et al. 2007

Chemistry A European J

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Spirodionic acid (1), a novel microbial metabolite with a spiro[4.5]decene skeleton, the 6-ethyl-2H-pyrone 5, dihydrosarkomycin (6), and other metabolites were isolated from the strain Streptomyces sp. Tü 6077. Structural elucidation was accomplished by NMR spectroscopic and mass-spectrometric studies, and the biosyntheses of compounds 1, 5, and 6 were investigated by feeding experiments with (13)C-labeled precursors. All results indicate a biogenetic sequence with metabolite 5 and sarkomycin (7) as precursors in the formation of spirocyclus 1 through an intermolecular Diels-Alder-type reaction.

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“…The IR spectrum of L1 shows an intense absorption at 1629 cm -1 , attributed to the C=O stretch, and two very intense absorptions at 1526 and 1107 cm -1 , assigned to the stretch of the C=N and C=S bonds of the thioamide group, respectively. [10] The N-H stretch was not observed in the IR spectrum. The 1 H NMR spectrum of L1 shows a very broad singlet at δ = 12.25 ppm due to the NH proton.…”

Section: Synthesis and Reactivity Of L1mentioning

confidence: 94%

Synthesis and Structure of Pd and Pt Complexes with Doubly Stabilized Phosphorus Ylides

et al. 2006

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The doubly stabilized P‐ylide ligands Ph3P=C(CO2Me)C(=S)N(H)Ph (L1), Ph3P=C(CN)C(=S)N(H)Ph (L2), and Ph3P=C(CN)–[(E)‐C(CO2Me)=CH(CO2Me)] (L3) have been prepared and fully characterized. The X‐ray structures of L1 and L2 are reported. The reactivity of L1, L2, and L3 towards cationic PdII and PtII precursors with two vacant coordination sites has been studied. Adducts of general formula [M(CX)(Ln)]ClO4, [M(CX)(Ln)2]ClO4, and [M(μ‐Ln)(CX)]2(ClO4)2 (CX = ancillary ligands) were obtained. The ylides Ln coordinate to the metal center through their heteroatoms (O, N, S), while the C bonding of Ln has not been observed in any of the cases studied. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

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Spektroskopische Daten zur Strukturaufklärung organischer Verbindungen

Cited by 43 publications

References 0 publications

Structure and mechanical properties of sodium and calcium caseinate edible active films with carvacrol

Structure and mechanical properties of sodium and calcium caseinate edible active films with carvacrol

Spirodionic Acid, a Novel Metabolite from Streptomyces sp., Part 1: Structure Elucidation and Diels–Alder‐Type Biosynthesis

Synthesis and Structure of Pd and Pt Complexes with Doubly Stabilized Phosphorus Ylides

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