Physicochemical characterization of fat blends related to margarine formulation

Poster (2009)

Effect of the content of partially hydrogenated oils on the physical and structural properties of bakery margarines

Poster (2008)

(+/-)-2-Benzoyl-8-ethyl-1,2-dihydro-isoquinoline-1-carbonitrile: an original Reissert compound

in Acta Crystallographica Section E-Structure Reports Online (2007), 63(Part 7), 3161-3073

The title compound, C19H16N2O, is a Reissert compound. The heterocyclic fragment of the molecule exhibits a 1,3-diplanar conformation. The phenyl ring is connected to the isoquinoline ring system via an ... [more ▼]

The title compound, C19H16N2O, is a Reissert compound. The heterocyclic fragment of the molecule exhibits a 1,3-diplanar conformation. The phenyl ring is connected to the isoquinoline ring system via an amide bond that adopts an anti conformation with respect to the adjacent C-N bond in the adjacent heterocyclic ring. Intra-and intermolecular C-H center dot center dot center dot O hydrogen bonds are present in the crystal structure. [less ▲]

Characterization of puff pastry margarines with and without TFA

Poster (2007)

Determination of physical changes of inulin related to sorption isotherms: An X-ray diffraction, modulated differential scanning calorimetry and environmental scanning electron microscopy study

in Carbohydrate Polymers (2006), 63(2), 210-217

This paper gives a relationship between powdered inulin behaviour and physical parameters determination. Glass transition temperature (T,) and development of crystallinity were measured in relation to the ... [more ▼]

This paper gives a relationship between powdered inulin behaviour and physical parameters determination. Glass transition temperature (T,) and development of crystallinity were measured in relation to the water moisture of the polymer. These parameters were obtained by Modulated Differential Scanning Calorimetry (MDSC) and powder X-ray diffraction, respectively. In order to change the water content of the powder, adsorption and desorption isotherms (using different relative humidity storage conditions) were done and successfully fitted to the Guggenheim-Anderson-de Boer (GAB) model. Dependent on the relative humidity storage, a caking phenomenon occurred when glass transition temperature was under storage temperature. An Environmental Scanning Electron Microscopy (ESEM) study showed a structural change when water activity increased above 0.56 at 20 degrees C. A correlation between the increase of the crystallinity and the hardening of the powder was determined. ESEM permitted an observation of the development of some crystal structures among the amorphous system, confirmed by an increase of the diffraction peaks obtained by powder X-ray diffraction. These observations lead to an understanding of the physical characteristics of inulin related to the water moisture. (c) 2005 Elsevier Ltd. All rights reserved. [less ▲]

Melting profile, polymorphic behaviour and chemical composition of some selected fractions issued from the multi-step dry fractionation of palm oil.

Poster (2005, November)

Physicochemical Characteristics of some ternary Fat Blends

Poster (2004, November)

Crystal structure of Enterobacter cloacae 908R class C beta-lactamase bound to iodo-acetamido-phenyl boronic acid, a transition-state analogue

in Cellular and Molecular Life Sciences (2003), 60(8), 1764-1773

The structures of the, class C beta-lactamase from Enterobacter cloacae 908R alone and in complex with a baronic acid transition-state analogue were determined by X-ray crystallography at 2.1 and 2.3 ... [more ▼]

The structures of the, class C beta-lactamase from Enterobacter cloacae 908R alone and in complex with a baronic acid transition-state analogue were determined by X-ray crystallography at 2.1 and 2.3 Angstrom, respectively. The structure of the enzyme resembles those of other class C beta-lactamases. The structure of the. complex with the transition-state analogue, iodo-acetamido-phenyl boronic acid, shows that the inhibitor is covalently, bound to the active-site serine (Ser64). Binding of the inhibitor within the active site is compared with previously determined structures of complexes with other class C enzymes. The structure of the boronic acid adduct indicates ways to improve the affinity of this class of inhibitors. This structure of 908R class C beta-lactamase in complex with a transitionstate analogue provides further insights into the mechanism of action of these hydrolases. [less ▲]

Structural approach of the mechanism of inhibition of -chymotrypsin by coumarins

in Bioorganic & Medicinal Chemistry Letters (2002), 12

Expression, purification, crystallization and preliminary X-ray analysis of the native class C beta-lactamase from Enterobacter cloacae 908R and two mutants.

in Acta Crystallographica Section D-Biological Crystallography (2001), 57(Pt 1), 162-4

Crystals have been obtained of the Enterobacter cloacae 908R beta-lactamase and two point mutants by the vapour-diffusion method using similar conditions [pH 9.0, polyethylene glycol (M(r) = 6000) as ... [more ▼]

Crystals have been obtained of the Enterobacter cloacae 908R beta-lactamase and two point mutants by the vapour-diffusion method using similar conditions [pH 9.0, polyethylene glycol (M(r) = 6000) as precipitant]. The three crystal forms belong to the orthorhombic space group P2(1)2(1)2, with roughly the same unit-cell parameters; i.e. for the wild-type crystals a = 46.46, b = 82.96, c = 95.31 A. In the best cases, the crystals diffract to about 2.1 A resolution on a rotating-anode X-ray source at room temperature. Co-crystallization experiments of poor substrates with the wild-type protein and the active-site serine mutant (S64C) are planned and should lead to a better understanding of the catalytic mechanism of class C beta-lactamases. [less ▲]