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排序方式: 共有92条查询结果,搜索用时 15 毫秒
71.
Latxague L Ziane S Chassande O Patwa A Dalila MJ Barthélémy P 《Chemical communications (Cambridge, England)》2011,47(47):12598-12600
We report new glycosyl-nucleoside-lipid based liposomes decorated with sugar moieties. The GNL-liposomes feature a suitable glycosylated surface for their internalization into ADSC stem cells. 相似文献
72.
González LJ Castellanos-Serra L Badock V Díaz M Moro A Perea S Santos A Paz-Lago D Otto A Müller EC Kostka S Wittmann-Liebold B Padrón G 《Electrophoresis》2003,24(1-2):237-252
An efficient method for digestion and extraction of proteolytic peptides from silver-stained proteins was applied to the characterization of nuclear proteins from the small cell lung cancer H82 (ATCC HTB 175) cell line previously separated by high-resolution large format two-dimensional gel electrophoresis. From 68 spots, evenly distributed on the gel area and representing a wide range of spot intensities, 63 (92%) were successfully identified by matrix-assisted laser desorption/ionization (MALDI) or electrospray ionozation-mass spectrometry (ESI-MS). In five cases where the identification was not possible, the presence of an intense background apparently due to the leakage of polymers from the microtubes or other plastics, was detected. Extensive analysis of peptide sequences by ESI MS/MS experiments allowed the identification of post-translational modifications, such as acetylation, phosphorylation, deamidation of asparagine residues and the presence of isoaspartic acid. A new protein variant not reported in sequence databases was also detected. 相似文献
73.
Giret N Roy P Albert A Pachet F Kreutzer M Bovet D 《The Journal of the Acoustical Society of America》2011,129(2):1089-1099
A crucial step in the understanding of vocal behavior of birds is to be able to classify calls in the repertoire into meaningful types. Methods developed to this aim are limited either because of human subjectivity or because of methodological issues. The present study investigated whether a feature generation system could categorize vocalizations of a bird species automatically and effectively. This procedure was applied to vocalizations of African gray parrots, known for their capacity to reproduce almost any sound of their environment. Outcomes of the feature generation approach agreed well with a much more labor-intensive process of a human expert classifying based on spectrographic representation, while clearly out-performing other automated methods. The method brings significant improvements in precision over commonly used bioacoustical analyses. As such, the method enlarges the scope of automated, acoustics-based sound classification. 相似文献
74.
Fatima Ezzahra El oumari Dalila Bousta Hamada Imtara Anissa Lahrichi Radouane Elhabbani Ghita El mouhri Omkulthom Al kamaly Asmaa Saleh Mohammad Khalid Parvez Andriy Grafov Tarik Sqalli Houssaini 《Molecules (Basel, Switzerland)》2022,27(13)
Ethnobotanical studies have reported the traditional medicinal uses of Acacia senegal (L.) Willd. and Argania spinosa (L.) Skeels against kidney stone formation and other chronic kidney diseases. The present work is undertaken to study the litholytic activity and the inhibiting activity of calcium oxalate crystallization by bioactive compounds identified in Argania spinosa (L.) Skeels press-cake (residue of Argan oil) and in Acacia senegal (L.) Willd. The litholytic activity was studied in vitro on cystine and uric acid stones using a porous bag and an Erlenmeyer glass. The study of the inhibiting activity of calcium oxalate crystallization, was based on temporal measurements of the optical density, registered at a 620 nm wavelength for 30 min using an ultraviolet–visible spectrophotometer. The silylation method was performed to identify phytochemicals, followed by gas chromatography coupled with mass spectrophotometry (GC/MS) analysis. The results show significant litholytic activity of Argania Spinosa press-cake hydro-ethanolic extract on uric acid and cystine stones, respectively, with dissolution rates (DR) of 86.38% and 60.42% versus 3.23% and 9.48% for the hydro-ethanolic extract of Acacia senegal exudate. Furthermore, the percentages of nucleation inhibition are 83.78% and 43.77% (p ˂ 0.05) for Argania spinosa and Acacia senegal, respectively. The results point to the detection of 17 phytochemicals in Argania spinosa press-cake extract, the majority of which are phenolic acids and have potent anti-urolithiatic action. 相似文献
75.
76.
Fatima Zahra Jawhari Abdelfattah El Moussaoui Mohammed Bourhia Hamada Imtara Hamza Mechchate Imane Es-Safi Riaz Ullah Essam Ezzeldin Gamal A. Mostafa Andriy Grafov Samir Ibenmoussa Dalila Bousta Amina Bari 《Molecules (Basel, Switzerland)》2020,25(22)
Background: Anacyclus pyrethrum (A. pyrethrum) is a wild species belonging to the family Asteraceae, which is used in traditional medicines. Aim of the study: This work was undertaken to study the chemical composition, analgesic, anti-inflammatory, and wound healing properties of hydroalcoholic extracts of different parts (roots, seeds, leaves, and capitula) of A. pyrethrum. Material and Methods: The phytochemical analysis of the studied extracts was conducted by GC-MS. The analgesic activity was evaluated in mice using acetic acid and formaldehyde methods. The anti-inflammatory activity was tested using the inhibitory method of edema induced in rats. The healing activity of the hydroethanolic extracts was explored by excision and incision wound healing models in rats. Results: The phytochemical analysis of the studied plant extracts affirmed the presence of interesting compounds, including some newly detected elements, such as sarcosine, N-(trifluoroacetyl)-butyl ester, levulinic acid, malonic acid, palmitic acid, morphinan-6-One, 4,5.alpha.-epoxy-3-hydroxy-17-methyl, 2,4-undecadiene-8,10-diyne-N-tyramide, and isovaleric acid. The extracts of different parts (roots, seeds, leaves, and capitula) exhibited promising anti-inflammatory, analgesic, and wound healing effects, with percentages of inhibition up to 98%, 94%, and 100%, respectively. Conclusion: This study might contribute towards the well-being of society as it provides evidence on the potential analgesic, anti-inflammatory, and wound healing properties of A. pyrethrum. 相似文献
77.
Song M. Hourston D. J. Reading M. Pollock H. M. Hammiche A. 《Journal of Thermal Analysis and Calorimetry》1999,56(3):991-1004
A modulated-temperature differential scanning calorimetry (M-TDSC) method for the analysis of interphases in multi-component
polymer materials has been developed further. As examples, interphases in a polybutadiene-natural rubber (50:50 by mass) blend,
a poly(methyl methacrylate)-poly(vinyl acetate) (50:50 by mass) structured latex film, a polyepichlorohydrinpoly(vinyl acetate)
bilayer film, and polystyrene-polyurethane (40:60 by mass) and poly(ethyl methacrylate)-polyurethane (60:40 by mass) interpenetrating
polymer networks were investigated. The mass fraction of interphase and its composition can be calculated quantitatively.
These interphases do not exhibit clear separate glass transition temperatures, but occur continually between the glass transition
temperatures of the constituent polymers.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
78.
Dalila Ben Hassen-Chehimi Najia Kbir-Ariguib Malika Trabelsi-Ayedi 《Journal of Thermal Analysis and Calorimetry》1998,53(1):169-176
The isothermal section at 10°C of the solubility diagram of the ternary system Na+, Mg++// ClH2O was established by conductimetric and analytical measurements.
Two solid phases, NaCl and MgCl2·6H2O are observed. The solubility range of NaCl is large, while the liquidus curve of MgCl2·6H2O is very short.
The composition of the eutonic point, determined by two methods was: 0.32 g% NaCl and 33.80 g% MgCl2.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
79.
Paulo A. Pereira Fernando A. C. C. Fontes Dalila B. M. M. Fontes 《Mathematical Programming》1976,10(1):409-412
Notice
Mathematical programming study 4Computational Practice in Mathematical Programming 相似文献80.
C. Marhag Dalila B Hassen-Chehimi H. Said 《Journal of Thermal Analysis and Calorimetry》2004,76(2):417-428
Thermodynamic exploration of solid-liquid equilibria of the MIPO3-Cu(PO3)2 (with MI=Li, Na, K, Rb, Cs, Ag, Tl) systems is carried out with a semi-empirical equation of the liquidus curves. The enthalpies
of fusion of pure polyphosphates and some intermediate compounds were determined from DTA curves. The temperature, enthalpy
and entropy of fusion are calculated for each solid phase with the exception of silver polyphosphate and the intermediate
compound Cs4Cu(PO3)6 which have very limited crystallization fields. The calculated values of the melting enthalpies are approximately equal to
the measured ones. The melting enthalpy of Cu(PO3)2 calculated from different binary systems shows a wide variation in the obtained values, 35-54 kJ mol-1. The experimental value is 33.65 kJ mol-1. The calculated temperatures and compositions in most binary systems are in good agreement with experimental determinations.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献