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21.
Fouzia Gudira Malika Saidi Idrissi Harald Krautscheid Lahcen El Ammari 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m530-m532
In the title compound, μ‐3,4′‐bi‐1,2,4‐triazole‐di‐μ‐chloro‐copper(II) monohydrate, {[CuCl2(C4H4N6)]·H2O}n, the Cu atom is located in a distorted octahedron consisting of two N atoms and four Cl atoms. The structural unit is an infinite chain in which octahedral groups, connected by shared edges, are also linked by bitriazole molecules. The bitriazole ligand, the Cu atom and the water O atom all lie on independent twofold axes. The structure is held together by hydrogen bonds between the water molecules and the non‐coordinated N atoms of the ligand, and by van der Waals forces. 相似文献
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23.
Boris?P.?AndreianovEmail author Fouzia?BouhsissEmail author 《Journal of Evolution Equations》2004,4(2):273-295
We consider the problem
in a smooth boundary domain
, as well
as the corresponding evolution equation
. For the stationary equation
we show existence results, then we adapt the techniques of doubling of variables
to the case of the homogeneous Neumann boundary conditions and obtain the
appropriate L
1
-contraction principle and uniqueness. Subsequently, we are able to apply the
nonlinear semigroup theory and prove the L
1
-contraction principle for the associated evolution equation. 相似文献
24.
Fouzia Jbilou Catherine Joly Sophie Galland Laurent Belard Valérie Desjardin Rémy Bayard Patrice Dole Pascal Degraeve 《Polymer Testing》2013,32(8):1565-1575
Plasticised corn flour/poly(butylene succinate-co-butylene adipate) (PBSA) materials were prepared by extrusion and injection in order to study the impact of PBSA ratio on their physicochemical properties and biodegradability. Scanning electron microscopy observations showed that corn flour and PBSA are incompatible. Three types of morphology have been observed: (i) starch dispersed in a PBSA matrix, (ii) a “co-continuous-like” morphology of starch and PBSA, and (iii) PBSA dispersed in a starch matrix. As expected, the extent of plasticised corn flour starch hydrolysis by amylolytic enzymes decreased when the amount of PBSA increased. Addition of a lipase to hydrolyse PBSA ester bonds enhanced enzymatic hydrolysis of starch by amylolytic enzymes in materials where PBSA formed a continuous phase. This suggests that PBSA formed a barrier restricting the access of amylolytic enzymes to starch. This was consistent with aerobic and anaerobic biodegradation assays, which also showed lower biodegradability of materials containing a majority of PBSA. 相似文献
25.
Studies on the chemical constituents of the fruits of Morinda citrifolia Linn. have led to the isolation of two new compounds, morinaphthalene (=1,3,6,7-tetrahydroxy-2-hydroxymethyl-1,2,3,4-tetrahydronaphthalene, (1); and morindafurone (=5-hydroxy-1,10b-dihydro-6H-anthra [1,9-bc] furan-6-one, (2); as well as two known constituents, 1,8-dihydroxy-6-methoxy-3-methyl-9-anthrone (3) and 2,4-dimethoxy-9-anthrone (4). Their structures were elucidated by spectral analysis including 2D NMR techniques. 相似文献
26.
Banacer Himmi Saïd Kitane Abdelhamid Eddaif Jean‐Pierre Joly Fouzia Hlimi Mohamed Soufiaoui Abdelmejid Bahloul Abdelfatah Sebban 《Journal of heterocyclic chemistry》2008,45(4):1023-1026
27.
Janjua NK Shaheen A Yaqub A Perveen F Sabahat S Mumtaz M Jacob C Ba LA Mohammed HA 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2011,79(5):1600-1604
Interactional studies of new flavonoid derivatives (Fl) with chicken blood ds.DNA were investigated spectrophotometrically in DMSO-H2O (9:1 v/v) at various temperatures. Spectral parameters suggest considerable binding between the flavonoid derivatives studied and ds.DNA. The binding constant values lie in the enhanced-binding range. Thermodynamic parameters obtained from UV studies also point to strong spontaneous binding of Fl with ds.DNA. Viscometric studies complimented the UV results where a small linear increase in relative viscosity of the DNA solution was observed with added optimal flavonoid concentration. An overall mixed mode of interaction (intercalative plus groove binding) is proposed between DNA and flavonoids. Conclusively, investigated flavonoid derivatives are found to be strong DNA binders and seem to be promising drug candidates like their natural analogues. 相似文献
28.
Fouzia K. Hannour Andreas Martin Angelika Brückner Gert-Ulrich Wolf Bernhard Lücke 《Reaction Kinetics and Catalysis Letters》1998,63(2):225-233
Vanadyl polyphosphates with a P/V ratio=2 (crystalline α-VO(PO3)2 and β-VO(PO3)2 as well as amorphous VO(PO3)2) were synthesized, starting from usually prepared precursor VO(H2PO4)2 but pursuing new methods using V2O5/H3PO4 as well as VOHPO4·1/2 H2O/H3PO4, too. The products were characterized by chemical analysis and X-ray diffractometry.In situ ESR spectroscopy was used as a tool to predict their catalytic activity in the ammoxidation reaction. 相似文献
29.
The petroleum ether and ethyl acetate fractions of dried ground seeds of Piper nigrum Linn. afforded sixteen compounds (1-16) including one new insecticidal amide, pipwaqarine (1) and six constituents (3,4,6,7,11,15) previously unreported from this plant. The structure of (1) has been elucidated through extensive 1D-, 2D-NMR spectral studies as, 1-[13-(3',4'-methylenedioxyphenyl)-2E,4E,12E-tridecatrienoyl]-N-isopentylamide, while those of known constituents through comparison of spectral data. 1 exhibited toxicity of 30ppm against fourth instar larvae of Aedes aegypti Liston determined by WHO method. A portion of petroleum ether fraction was also subjected to GC and GC-MS analysis resulting in the identification of three compounds (17-19) using the NIST Mass spectral search program 1998 and Kovat's retention indices. Two of these compounds, 17 and 18, are reported for the first time from this plant. 相似文献
30.
In [6] we analyzed the direct analytical nodal methods (ANM) of indexl and show that the corresponding mathematical methods are equivalent to the physical ones when the components of the matrices are calculated by generalized Radau reduced integration. In this article we extend the theorem 8 of [7] to the polynomial nodal methods (PNM) (exact calculation of moments) which are thus the order ofO(h l+3?δ l0. We also show that the analytical nodal methods are only the order ofO(h l+2). Forl = 0 our numerical results confirm our theoretical results. 相似文献