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1.
The performance of a home made MIS–p-Si solar cell was experimentally studied under various gamma irradiation doses (up to 500 Mrad). The effect of radiation dose on the I−V and C−V characteristics was investigated in this work. The obtained results showed that all the output parameters of the cells under investigation were degraded with gamma radiation exposure. In addition, the effects of fabrication conditions (metal thickness and adding of antireflection coating) on the cell output parameters were also investigated. 相似文献
2.
A patient presented with a 15 year history of schizophrenia with auditory hallucinations. Though unresponsive to prolonged trials of neuroleptics, the auditory hallucinations disappeared with etizolam. 相似文献
3.
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
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Different acid solids loaded with 1 wt.% of Pt have been studied in n-heptane hydroisomerization in order to determine the influence of porosity and acidity (considered measured by the activity) on selectivities. The open solids like Y and β zeolites and a pillared clay present different activities towards n-C7 conversion but similar selectivities. Consequently, acidity seems to be a less important parameter in n-C7 isomerization than porosity. Very different results were obtained as a function of the solid structure and so n-heptane hydroconversion appears to be a simple and rapid method to obtain data concerning the porosity of unknown zeolite structures. The highest content of multibranched isomers was obtained on open solids but the value predicted by the thermodynamic was never reached due to the fact that cracking of multibranched isomers is initiated quickly. 相似文献
6.
Aicha Sifou Guiseppe Meca Ana Belen Serrano Naima Mahnine Abdellah El Abidi Jordi Mañes Mohamed El Azzouzi Abdellah Zinedine 《Food Control》2011,22(12):1826-1830
Seventy samples of rice purchased from local markets in six cities from Morocco (Rabat, Casablanca, Kénitra, Mohammadia, Tanger and Errachidia) were analyzed for the presence of six emerging mycotoxins: four enniatins ENs (ENA, ENA1, ENB and ENB1), beauvericin (BEA) and fusaproliferin (FUS). Samples were extracted with a mixture of acetonitrile/water (85/15, v/v) by using an ultra-turrax homogenizer. Mycotoxins were then identified and quantified with liquid chromatography (LC) coupled to diode array detector (DAD). Positive samples were confirmed with an LC-MS/MS. Analytical results showed that BEA was present in 75.7% of total analyzed samples. BEA levels varied between 3.8 and 26.3 mg/kg. The frequencies of contamination of samples with total ENs and FUS were 50% and 4.3%, respectively. Among the ENs, ENB was the mycotoxin much more found (30% of total samples), while ENB1, ENA and ENA1 were found in 24.6%, 22.8% and 5.7% of total samples, respectively. The high ENs value was registered in a rice sample from kénitra (448.7 mg/kg of ENA1). This is the first study that describes the presence of emerging Fusarium mycotoxins in rice available in Morocco. 相似文献
7.
Naima Iltaf Abdul Ghafoor Usman Zia Mukhtar Hussain 《Wireless Personal Communications》2014,75(3):1689-1713
The performance of indirect trust computation models (based on recommendations) can be easily compromised due to the subjective and social-based prejudice of the provided recommendations. Eradicating the influence of such recommendation remains an important and challenging issue in indirect trust computation models. An effective model for indirect trust computation is proposed which is capable of identifying dishonest recommendations. Dishonest recommendations are identified by using deviation based detecting technique. The concept of measuring the credibility of recommendation (rather than credibility of recommender) using fuzzy inference engine is also proposed to determine the influence of each honest recommendation. The proposed model has been compared with other existing evolutionary recommendation models in this field, and it is shown that the model is more accurate in measuring the trustworthiness of unknown entity. 相似文献
8.
Victor Sans Fabien Gelat Naima Karbass M. Isabel Burguete Eduardo García‐Verdugo Santiago V. Luis 《Advanced Synthesis \u0026amp; Catalysis》2010,352(17):3013-3021
Polymer‐supported ionic liquid‐like species (SILLPs) with different functionalities have been combined to obtain new catalytic systems (polymer cocktail) with improved properties towards their application for C C coupling reactions. The SILLPs have been synthesized in a simple way and combined to play different functions in the reaction medium. Those roles involve simultaneously (or consecutively) their actuation as supported reagents, precatalysts and scavengers of undesired reaction side‐products. The system has been tested by employing three different C C coupling reactions for 8 consecutive cycles. Moreover, different aryl bromides and iodides have proved to be efficiently transformed by the catalytic cocktail. Finally, the Heck reaction has been conducted in continuous‐flow conditions using a packed bed of this polymer cocktail and employing supercritical carbon dioxide (scCO2) as a solvent, which cannot be carried out with the use of soluble bases as this would lead to the clogging of the reactor. Finally, the SILLPs cocktail enables one to combine different reaction steps and purification in a single vessel, which represents a significant improvement in terms of process intensification and green chemistry. This is particularly true in the case of the use of scCO2 as this allows the direct production of crude materials not contaminated either by salts or by solvents. 相似文献
9.
Nahla Noureddine Naima Zerrouk Ioannis Nicolis Patrick Allain Souad Sfar Jean-Claude Chaumeil 《Drug development and industrial pharmacy》2005,31(4):397-404
After oral administration, drug absorption rate is recognized to be dependent on two major factors: dissolution and intestinal cells permeability. Caco-2 monolayer cells have been largely used as a permeation study model. In this study, a numerical approach funded on an exponential first-order time relationship was tested to compare immediate- and controlled-release tablets of theophylline using a dissolution-permeation system. The dissolution performance using USP II paddle apparatus was coupled to the permeability studies investigated in Caco-2 cell monolayers. The dissolved samples were taken at different times; their pH and osmolarity were adjusted to render them suitable to Caco-2 permeability studies (osmolarity = 300 mosm, pH = 7.4). The experimental data show that the dissolution fits the exponential first-order relationship rate. The permeability values were in a range of 4.45 10- 6-5.28 10- 6 cm/s, and percentages of absorbed drug dose were dependent on the fraction initially present in the donor compartment, indicating that absorption of theophylline was dissolution rate limited. Plotting experimental absorbed fractions (Fa) against experimental dissolved fractions (Fd) show that permeation is the rate-limiting step in drug absorption process in the extended release form of theophylline. Our results demonstrate a general agreement between observed Fa/Fd relationships and theoretical Fa/Fd relationships obtained with our approach funded on dissolution and permeation behavior. We concluded that the couple dissolution-caco-2 system could be a useful tool to characterize intestinal permeation for a new formulation of a drug compared with the conventional one. 相似文献
10.
F Benazzi 《Canadian Metallurgical Quarterly》1998,13(6):421-422
Recent reports have suggested a relationship between release of lower-extremity contractures and the development of hypertension in cerebral palsy and poliomyelitis patients. A retrospective study was performed on 119 cerebral palsy patients who had undergone lower-extremity contracture releases. Temporary elevation of systolic blood pressure in the perioperative and intraoperative periods occurred in 46 patients (39%), and temporary elevation of diastolic blood pressure occurred in 14 patients (12%). Type of cerebral palsy, patient age, patient sex, type of anesthesia, and type of procedure were not significantly correlated with the temporary blood pressure elevations. No patient developed sustained elevation of systolic and diastolic blood pressure. We conclude that lower-extremity contracture release in pediatric patients is not associated with an increased incidence of postoperative hypertension. 相似文献