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1.
EA Ismail IS Shabani M Badawi H Sanaa S Madi A Al-Tawari H Nadi M Zaki Q Al-saleh 《Canadian Metallurgical Quarterly》1998,13(10):488-492
We studied Guillain-Barré syndrome, affecting children 12 years old or less, throughout Kuwait, in the period between January 1, 1992, and March 31, 1997. Nineteen children had the diagnostic criteria of Guillain-Barré syndrome, with an overall annual incidence rate of 0.95/100,000 population at risk. Female patients outnumbered male patients with a sex ratio of 1.4:1. There was a clustering of cases in winter and spring and in the year 1996. The disease symptoms were relatively severe in our patients because only 16% (3 of 19) of them were able to walk at the height of their illness, whereas the rest were bed or chair bound or needed assisted ventilation. Two patients had the electrodiagnostic features of axonal neuropathy and both had residual deficits on follow-up, whereas the rest recovered fully. All the patients received intravenous immunoglobulin. The mean time to walk unaided was 23.5 days (range, 2-84 days) after intravenous immunoglobulin and excluding the two patients with axonal neuropathy, and full recovery was achieved in a mean time of 103 days (range, 30-300 days). Contrary to previous studies, we found no correlation between oral polio vaccine administration and Guillain-Barré syndrome in 2 successive years (1995 and 1996) during a nationwide campaign targeting children less than 5 years old. 相似文献
2.
Bilal Muhammad Imtiaz Sana Abdul Wadood Ghouzali Sanaa Asif Shahzad 《Multimedia Tools and Applications》2014,72(2):1073-1092
Multimedia Tools and Applications - Conventional steganography focuses on invisibility and undetectability, as the main concern is to make the algorithms immune to steganalysis. Zero-steg-anography... 相似文献
3.
Sanaa Elbouazzaoui Xavier Courtois Patrice Marecot Daniel Duprez 《Topics in Catalysis》2004,(1):493-496
The deactivation of a Pt/Ba/Al2O3 NO
x
-trap model catalyst submitted to SO2 treatment and/or thermal ageing at 800 °C was studied by H2 temperature programmed reduction (TPR), X-ray diffraction (XRD) and NO
x
storage capacity measurements.The X-ray diffractogram of the fresh sample exhibits peaks characteristic for barium carbonate. Thermal ageing leads to the decomposition of barium carbonate and to the formation of BaAl2O4. The TPR profile of the sulphated sample shows the presence of (i) surface aluminium sulphates, (ii) surface barium sulphates, (iii) bulk barium sulphates. The exposure to SO2 after ageing leads to a small decrease of the surface barium-based sulphates, expected mainly as aluminate barium sulphates. This evolution can be attributed to a sintering of the storage material. TPR experiments also show that thermal treatment at 800 °C after the exposure to SO2 involves the decomposition of aluminium surface sulphates to give mainly bulk barium sulphates, also pointed out by XRD. Thus, the thermal treatment at 800 °C leads to a stabilization of the sulphates.These results are in accordance with the NO
x
storage capacity measurements. On non-sulphated catalysts, the treatment at 800 °C induces to a decrease of the NO
x
storage capacity, showing that barium aluminate presents a lower NO
x
storage capacity than barium carbonate. Sulphation strongly decreases the NO
x
storage capacity of catalysts, whatever the initial thermal treatment, showing that barium sulphates inhibit the NO2 adsorption. Moreover, the platinum activity for the NO to NO2 oxidation is lowered by thermal treatments. 相似文献
4.
Recent developments in information technology and Web services have increased the potential for creating more rapid and extensive
social networks and business relationships. Web 2.0 technologies, commonly referred to as online social media, have become
important tools within the growth of information and communication technology (ICT) in the last few years. Web 2.0 tools such
as blogs, Wiki and other services, which are widely used by individuals, also have an effect on customer relationship management
(CRM) systems. Consequently, social CRM (SCRM) is emerging as a new paradigm for integrating social networking in more traditional
CRM systems. However, social CRM is yet to be fully utilised as a value-adding tool in improving customer relationships. This
paper reports on a scoping study that explored the current situation of CRM adoption in banking industry in Saudi Arabia.
The aim of this paper is to identify the factors that may influence businesses and customers’ adoption of social CRM. Various
models have been proposed to study ICT and information systems acceptance and usage. This paper proposes an enhancement to
one of these models, specifically the Technology Acceptance Model (TAM), by incorporating a range of factors identified in
the social networking and business relationships literature believed to influence social CRM adoption. In particular, the
model proposes that familiarity, caring behaviour, sharing information and perceived trustworthiness can generate cognitive
view about the relationships between employees and customers. This view besides Web 2.0 features may offer a way of analysing
the potential adoption of social CRM. 相似文献
5.
Bousnina Naima Zheng Lilei Mikram Mounia Ghouzali Sanaa Minaoui Khalid 《Multimedia Tools and Applications》2021,80(5):7229-7246
Multimedia Tools and Applications - In the last few decades, deep-learning-based face verification and recognition systems have had enormous success in solving complex security problems. However,... 相似文献
6.
In this article, polymer microspheres and silica nanoparticles have been discussed as important filler in polymer composites. Their synthesis methods, properties, and application were particularly stressed. Silica is usually used as nucleating agent, surface enhancement mediator, and as templates and cores. Among polymer/silica composites, various categories including polyaniline, polypyrrole, polystyrene, epoxy, rubber, and acrylate polymer were discussed in detail. It was observed that silica nanoparticles enhanced mechanical strength and overall performance of composites. Furthermore, composites having carbon nanotube along with silica particles possess high electrical and mechanical performance. These composites are important in nanoelectronic devices, nanomedicines, and defense-related applications. 相似文献
7.
Nadjet Rezki Salsabeel A. Al-Sodies Mohamed R. Aouad Sanaa Bardaweel Mouslim Messali El Sayed H. El Ashry 《International journal of molecular sciences》2016,17(5)
The present work reports an efficient synthesis of fluorinated pyridinium salts-based hydrazones under both conventional and eco-friendly ultrasound procedures. The synthetic approach first involves the preparation of halogenated pyridinium salts through the condensation of isonicotinic acid hydrazide (1) with p-fluorobenzaldehyde (2) followed by the nucleophilic alkylation of the resulting N-(4-fluorobenzylidene)isonicotinohydrazide (3) with a different alkyl iodide. The iodide counteranion of 5–10 was subjected to an anion exchange metathesis reaction in the presence of an excess of the appropriate metal salts to afford a new series of fluorinated pyridinium salts tethering a hydrazone linkage 11–40. Ultrasound irradiation led to higher yields in considerably less time than the conventional methods. The newly synthesized ILs were well-characterized with FT-IR, 1H NMR, 13C NMR, 11B, 19F, 31P and mass spectral analyses. The ILs were also screened for their antimicrobial and antitumor activities. Within the series, the salts tethering fluorinated counter anions 11–13, 21–23, 31–33 and 36–38 were found to be more potent against all bacterial and fungal strains at MIC 4–8 µg/mL. The in vitro antiproliferative activity was also investigated against four tumor cell lines (human ductal breast epithelial tumor T47D, human breast adenocarcinoma MCF-7, human epithelial carcinoma HeLa and human epithelial colorectal adenocarcinoma Caco-2) using the MTT assay, which revealed that promising antitumor activity was exhibited by compounds 5, 12 and 14. 相似文献
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9.
Novel polystyrene microsphere (PSMS)-based PSMS/Si and polystyrene/silica nanoparticle/multi-walled carbon nanotube (PS/Si/MWCNT) nanocomposite has been prepared using in situ sol-gel and chemical amalgamation methods. Aniline monomer was introduced by in situ route to form PSMS/PANI, PSMS/PANI/Si and PSMS/PANI/Si/MWCNT nanocomposite. FESEM of nanocomposite indicated core-shell spherical and tubular morphology. Glass transition temperature (Tg) and maximum decomposition temperature (Tmax) of PSMS/PANI/Si/MWCNT nanocomposite were found as 295°C and 524°C, respectively, which were higher than the PSMS/PANI (Tg = 245°C; Tmax = 387°C) and PSMS/PANI/Si (Tg = 257°C; Tmax = 388°C) nanocomposite. For nanocomposite dispersion, tetrahydrofuran was studied as fine solvent. XRD depicted amorphous nature of PSMS/Si and PSMS/PANI/Si; however MWCNT reduced amorphous character of PSMS/PANI/Si/MWCNT. Electromagnetic interference (EMI) shielding effectiveness improved from 0.1 dB (PSMS) to 12.3 dB (PSMS/PANI/Si) to 24.5 dB (PSMS/PANI/Si/MWCNT). The increase in EMI shielding effectiveness was also observed with variation in log of conductivity from ?14 mho m?1 (PSMA) to 1.17 mho m?1 (PSMS/PANI/Si/MWCNT). 相似文献
10.