Amidoxime modification of polyacrylonitrile/Pterocladia capillacea-derived activated carbon composite for adsorption of toxic chromium from aquatic environment

Amany GM Shoaib,El Nemr Ahmed,El Sikaily Amany,Masoud Mamdouh S.,Ramadan Mohamed S. 한국탄소학회 2022 Carbon Letters Vol.32 No.2

By polymerizing acrylonitrile in the presence of ammonium persulfate as an initiator and Pterocladia capillacea-activated carbon (P-AC) as a filler, a composite material polyacrylonitrile/Pterocladia capillacea-activated carbon (PAN/P- AC) was developed. By reacting hydroxylamine with the composite's nitrile groups, the prepared composite was functionalized by amidoximation. FTIR spectrometry, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Brunauer–Emmett–Teller (BET) analysis were all applied to thoroughly characterize the fabricated adsorbent. For the treatment of Cr(VI) ions from synthetic solutions, the adsorption properties of amidoximated polyacrylonitrile/Pterocladia capillacea-activated carbon (PAO/P-AC) were investigated. The pH effect, uptake kinetics, adsorption isotherms, and thermodynamics studies were used to characterize adsorption properties. As a kinetic model analysis, the data confirmed that the pseudo-second-order rate equation matched well the adsorption process. With coefficients of determination (R2) of 0.9998, the Tempkin isotherm model had the lowest error, suggesting that it is the best fitted model to describe this adsorption mechanism. Thermodynamic parameters demonstrated that Cr(VI) adsorption was endothermic.

Investigation of hydrodynamic and mass transfer of mercaptan extraction in pulsed and non-pulsed packed columns

Pouria Amani,Mohammad Amani,Reza Hasanvandian 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.5

We investigated the hydrodynamic behavior and mass transfer characteristics of a pilot-scale conventional packed bed extraction column of mercaptan removal from liquid propane. The extraction column was filled with pall rings structured packing where mercaptan was extracted from the continuous phase to the dispersed phase, accompanied by a chemical reaction in propane-mercaptan-caustic system. The pulsing was introduced into the column to enhance the mass transfer rate. Hydrodynamic parameters such as hold up, flooding velocity and mean drop size were studied together with the effect of chemical reaction on increasing mass transfer performance. Finally, the mass transfer and axial mixing coefficients were obtained from the optimization of data by ADM. It was found that at the pulsation intensity from 0.003 to 0.007 m/s, the maximum mass transfer and minimum axial mixing occurred and it can be concluded that pulsation improves the efficiency of mass transfer just at low intensities.

Mechanisms of Structural Borrowing in Chimalaba

Mreta Abel Yamwaka,Amani Hamisi 한국외국어대학교 아프리카연구소 2012 Asian Journal of African Studies Vol.32 No.-

The paper aims to describe mechanisms through which various structural items were borrowed from Kiswahili into Chimalaba. It is an attempt to illustrate how various linguistic constraints seem to determine the borrowing of structural features in a given language contact situation. The primary data for this paper, are based on the research project by Amani (2010) on the Influence of Kiswahili in Chimalaba. There are, approximately 16 structural items borrowed from Kiswahili into Chimalaba as listed in Amani (2010: 58). The main focus is on whether the cases of structural borrowing identified are the result of direct or indirect borrowing and in displaying either of the two, what linguistic constraints are typically at work. Structural borrowing in Chimalaba reveals that Chimalaba has put a stiff resistance to direct structural borrowing, as there are only three items out of 16 structural items that have been directly borrowed from Kiswahili. This has also been possible only in the relevant sub-parts that seem to be more or less similar between Kiswahili and Chimalaba. Most of structural features in Chimalaba have been indirectly borrowed through lexical transfer, constraints of language system and blending. This paper therefore presents indirect and direct structural borrowing and the mechanisms of borrowing used in each category.

The Feminist Movement in Post Ottoman Egypt: Revisiting the Contributions of non-Muslim Women Pioneers

Amany Soliman 부산외국어대학교 지중해지역원 2021 The Mediterranean Review Vol.14 No.1

The rise of Egyptian nationalism gave a momentum to the women’s struggle in alignment to the fight for independence. Hence, the history of Egyptian women’s awakening can be read parallel to the history of modern Egyptian nationalism. In this article, there is a spotlight on the efforts of non-Muslim women, either Egyptian or foreigner, who were pioneers in leading women’s advancement in Egypt. However, these women were less celebrated in the writings of Egyptian history either in Egypt or in the West, in comparison to Muslim pioneers. Few of the non-Muslim pioneers are scarcely mentioned in many secondary sources of the Egyptian feminism history without referring to their different identity and their belonging to a minority. Sometimes they are mentioned in the history of education or advancement of a certain industry without referring to their leading roles in advancing the lives of Egyptian women in general. In this article, the legacy of non-Muslim women and their contribution to the women movement in Post Ottoman Egypt will be revisited.

Infrastructure Component Assessment Using the Condition Index System: Literature Review and Discussion

Amani, Nima,Nasly, M.A.,Samat, Roslida Abd Korea Institute of Construction Engineering and Ma 2012 Journal of construction engineering and project ma Vol.2 No.1

Recent requirements in component management of building systems have focused on the requirement for improving methods and metric tools to support component condition assessment and appropriate decisions for infrastructure owned facilities. Although engineers and researchers have focused on developing methodologies for component assessment in recent years but there is not enough attention dedicate to facilities and components that have been constructed. This paper is a literature study of scientific papers within the topic of component condition index system (CCIS) in the period 1976 to 2009. Infrastructure component condition index had existed for some 40 years. The purpose of this paper is to provide an overview of CCIS to identify the suitable method for component condition assessment during its service life. This paper finds that the focus of CCIS, surveyed in several aspects during the 40 years that have been investigated, from technology to measurement and from assessment function to component maintenance as an integrated part of the infrastructure component management. This study offers help to researchers in understanding the selection of an appropriate method for component condition assessment in building and non-building systems.

A non-ordinary state-based peridynamics formulation for thermoplastic fracture

Amani, J.,Oterkus, E.,Areias, P.,Zi, G.,Nguyen-Thoi, T.,Rabczuk, T. Pergamon Press ; Elsevier Science Ltd 2016 International journal of impact engineering Vol.87 No.-

In this study, a three-dimensional (3D) non-ordinary state-based peridynamics (NOSB-PD) formulation for thermomechanical brittle and ductile fracture is presented. The Johnson-Cook (JC) constitutive and damage model is used to taken into account plastic hardening, thermal softening and fracture. The formulation is validated by considering two benchmark examples: 1) The Taylor-bar impact and 2) the Kalthoff-Winkler tests. The results show good agreements between the numerical simulations and the experimental results.

Building Facilities Management Using the Condition Prediction Process: A Case Study of Fiberglass Doors

Amani, Nima Korea Institute of Construction Engineering and Ma 2014 Journal of construction engineering and project ma Vol.4 No.3

In the last decades, Facility Management (FM) has established itself as a key building service factor.FM includes supporting services and organizing functions essential for maintaining, operating and managing physical component and material. The purpose of the paper is to develop an economical analysis for building facilities management during its service life based on limited cost. This method helps to facilities managers and engineers to make better decisions for reducing of facilities assessment costs and increasing the facilities' service life. This paper presents the preliminary development of a model involves three stages process namely data collection, economic computation and economic process optimization. This process was tested for fiberglass doors example in a building interior and exterior system. If executives can manage essential points effectively and make decisions according to a key performance index, cost can be optimized and safety can be enhanced for installation building.

Development of electroless Ni–P modified aluminum substrates in a simulated fuel cell environment

Amani E. Fetohi,K.M. El-Khatib,R.M. Abdel Hameed 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.30 No.-

The corrosion resistance of electroless Ni–P coating on pure Al, Al 6061, Al 3004 and Al 1050 is examinedin an environment simulated to PEM fuel cell. Potentiodynamic polarization techniques, Interfacialcontact resistance, surface morphology, chemical composition of coated substrates and EISmeasurements have been investigated. Modified Al 1050 showed reduction in its corrosion currentdensity by 44.69 times. It also showed the best stability of all modified Al substrates. The formed Ni–Player on Al 1050 is thicker by about 3 times, relative to that on Al 6061 and has higher Ea value of135.68 kJ mol 1 supporting its lower corrosion rate.

Analysis of Relationships between Altitude and Distance from Volcano with Stomach Cancer Incidence Using a Geographic Information System

Amani, F,Ahari, S Sadeghieh,Barzegari, S,Hassanlouei, B,Sadrkabir, M,Farzaneh, Esmaeil Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.16

Gastric cancer (GC) is the fifth most common cancer in the world, with a wide variation in incidence rates across different geographical areas. In Iran GC is the most common cancer in males and it is reported to be the third most prevalent after breast and colorectal in females. A geographical information system (GIS) allows investigation of the geographical distribution of diseases. The purpose of the present study was to explore the relationship between gastric cancer and effective climatic factors using GIS. The dispersion distribution and the relationship between environmental factors effective on cancer were measured using Arc GIS. Of all cases, 672 (73.8%) were in males with a sex ratio of 3 to1. The highest incidence by cities was seen in Namin with 137.5 per 100,000. The results of this study showed that the distribution of GC around the Sabalan volcanic mountain was significantly higher than other places in the same province. These results can be considered as a window to future comprehensive research on gastric cancer.

Potential Role for a Panel of Immunohistochemical Markers in the Management of Endometrial Carcinoma

Amany Salama,Mohammad Arafa,Eman ElZahaf,Abdelhadi Mohamed Shebl,Azmy Abd El-Hameed Awad,Sylvia A. Ashamallah,Reda Hemida,Anas Gamal,Abd AlRahman Foda,Khaled Zalata,El-Said M. Abdel-Hady 대한병리학회 2019 Journal of Pathology and Translational Medicine Vol.53 No.3

Background: In order to improve the efficacy of endometrial carcinoma (EC) treatment, identifying prognostic factors for high risk patients is a high research priority. This study aimed to assess the relationships among the expression of estrogen receptors (ER), progesterone receptors (PR), human epidermal growth factor receptor 2 (HER2), Ki-67, and the different histopathological prognostic parameters in EC and to assess the value of these in the management of EC. Methods: We examined 109 cases of EC. Immunohistochemistry for ER, PR, HER2, and Ki-67 were evaluated in relation to age, tumor size, International Federation of Gynecology and Obstetrics (FIGO) stage and grade, depth of infiltration, cervical and ovarian involvement, lymphovascular space invasion (LVSI), and lymph node (LN) metastasis. Results: The mean age of patients in this study was 59.8 ± 8.2 years. Low ER and PR expression scores and high Ki-67 expression showed highly significant associations with non-endometrioid histology (p = .007, p < .001, and p < .001, respectively) and poor differentiation (p = .007, p < .001, and p <. 001, respectively). Low PR score showed a significant association with advanced stage (p = .009). Low ER score was highly associated with LVSI (p = .006), and low PR scores were associated significantly with LN metastasis (p = .026). HER2 expression was significantly related to advanced stages (p = .04), increased depth of infiltration (p = .02), LVSI (p = .017), ovarian involvement (p = .038), and LN metastasis (p = .038). There was a close relationship between HER2 expression and uterine cervical involvement (p = .009). Higher Ki-67 values were associated with LN involvement (p = .012). Conclusions: The over-expression of HER2 and Ki-67 and low expression of ER and PR indicate a more malignant EC behavior. An immunohistochemical panel for the identification of high risk tumors can contribute significantly to prognostic assessments.