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Sedky Hebatallah Adel,Youssef Soha Raouf,Gamal Doaa Ahmad,Houssein Heba Fawzy,Elsalakawy Walaa Ali 대한혈액학회 2020 Blood Research Vol.55 No.4
Background Lymphoproliferative disorders (LPDs) are a heterogeneous group of diseases characterized by an uncontrolled production of monoclonal lymphocytes. RECAF is the receptor for alpha-fetoprotein, which is re-expressed on malignant cells, thus serving as a broad-spectrum tumor marker. Methods The current study is a retrospective study carried out on 200 archival bone marrow trephine biopsy specimens [60 normal control (NC), 38 pathological control (PC) and 102 lymphoproliferative diseases (LPD) specimens]. RECAF expression was assessed using immunohistochemistry. Results The percentage of cells that are positive for RECAF was significantly higher in the LPD group than in the NC group (P=0.007), while there was no significant difference between non-Hodgkin lymphoma (NHL) patients and PC regarding the number of RECAF positive cells (P =0.1). RECAF showed a unique expression pattern among the different subtypes of LPD. None of the hairy cell leukemia (HCL) expressed RECAF, while the highest percentage was seen in follicular lymphoma (FL) and diffuse large B cell lymphoma (DLBCL) (P=0.001). Compared to routine histopathology, RECAF was more sensitive in detecting bone marrow (BM) infiltration in FL, mantle cell lymphoma (MCL), and DLBCL (P =0.01). Conclusion RECAF is significantly expressed in the BM of NHL/chronic lymphocytic leukemia (CLL) patients. RECAF shows a unique expression pattern among the different subtypes of LPD. Furthermore, RECAF may help to detect bone marrow infiltration in lymphoma cells. This may help in the diagnosis, follow-up, and targeting of LPD.
Possible two non-linear regions in the IeV characteristics of ZnO varistors
A. Sedky,H. Mahfoz Kotb 한국물리학회 2013 Current Applied Physics Vol.13 No.9
We report here structural and IeV characteristics of ZnO varistor with Fe2O3 nanoparticles additions(≤200 nm). It was found that the addition of Fe does not influence the wurtzite structure of ZnO ceramics,while the average grain size was affected. Interestingly, the nonlinear regionwas clearly observedin the IeV characteristics of the samples with Fe = 2.5%, 5% and 10%. Whereas, two nonlinear regionswere only observed with further increase of Fe addition above 10% (30% and 50%). Although the values ofnon-linear coefficient are decreased by the additions of Fe, the breakdown field could be increased up to7900 V/cm. Furthermore, the electrical conductivity was improved by increasing Fe up to 10%, followedby a decrease with further increase of Fe up to 50%. These results were discussed in terms of Fe2O3nanosize grains which were formed and localized at the grain boundaries of ZnO ceramics.
Bacteria and Fungi as Alternatives for Remediation of Water Resources Polluting Heavy Metals
주진호,Khalid A. Hussein,Sedky H. A. Hassan 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.4
Classical methods which used for removal of heavy metals from contaminated water are adsorption, precipitation,coagulation, ion exchange resin, evaporation, and membrane processes. Microbial biosorption can be used for the removal of contaminated waters with pollutants such as heavy metals and dyes which are not easily biodegradable. Microbial biosorbents are inexpensive, eco friendly and more effective for the removal of toxic metals from aqueous solution. In this review, the bacterial and fungal abilities for heavy metals ions removal are emphasized. Environmental factors which affect biosorption process are also discussed. A detailed description for the most common isotherm and kinetic models are presented. This article reviews the achievements and the current status of bacterial and fungal biosorption technology for heavy metals removal and provides insights for further researches.
Biosorptive capacity of Cd(II) and Pb(II) by lyophilized cells of Pleurotus eryngii
주진호,Khalid A. Hussein,Sedky H. A. Hassan 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.4
The discharge of heavy metals into aquatic ecosystems has become a matter of concern in over the world the last few decades. In this study, the lyophilized cells of Pleurotus eryngii (mushroom) were used as an inexpensive biosorbent for Cd(II) and Pb(II) removal from aqueous solutions. The effect of various physicochemical factors on Cd(II) and Pb(II) biosorption such as pH (2.0-7.0), initial metal concentration (0.0-300 mg L^-1), temperature, fungal biomass and contact time (0-120 min) were studied. Optimum pH for removal of Cd(II) and Pb(II) was 6.0, and the contact time was 45 min at room temperature. The nature of biosorbent and metal ion interaction was evaluated by Infrared (IR) spectroscopic technique. IR analysis of mushroom biomass revealed the presence of amino, carboxyl, hydroxyl and methyl groups, which are responsible for biosorption of Cd(II) and Pb(II). The maximum adsorption capacities of P. eryngii for Pb(II)and Cd(II) calculated using Langmuir adsorption isotherm were 82.0 and 16.13 mg g^-1, respectively. The adsorption isotherms for two biosorbed heavy metals were fitted well with Freundlich isotherm as well as Langmuir model with correlation coefficient (r^2>0.99). Thus, this study indicated that the P. eryngii is an efficient biosorbent for the removal of Cd(II) and Pb(II) from aqueous solutions.
Majid Mohammadi,Mehdi Sedighi,Rajamohan Natarajan,Sedky Hassan Aly Hassan,Mostafa Ghasemi 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.1
Oilfield produced water is one of the vast amounts of wastewater that pollute the environment and cause serious problems. In this study, the produced water was treated in a microbial fuel cell (MFC), and response surface methodology and central composite design (RSM/CCD) were used as powerful tools to optimize the process. The results of two separate parameters of sulfonated poly ether ether ketone (SPEEK) as well as nanocomposite composition (CNT/Pt) on the chemical oxygen demand (COD) removal and power generation were discussed. The nanocomposite was analyzed using XRD, SEM, and TEM. Moreover, the degree of sulfonation (DS) was measured by NMR. A quadratic model was utilized to forecast the removal of COD and power generation under distinct circumstances. To obtain the maximum COD removal along with maximum power generation, favorable conditions were achieved by statistical and mathematical techniques. The findings proved that MFC could remove 92% of COD and generate 545mW/m2 of power density at optimum conditions of DS=80; and CNT/Pt of 14 wt% CNT- 86 wt% Pt.
Biosorptive capacity of Cd(II) and Pb(II) by lyophilized cells of Pleurotus eryngii
Joo, Jin-Ho,Hussein, Khalid A.,Hassan, Sedky H.A. Korean Society of Soil Science and Fertilizer 2011 한국토양비료학회지 Vol.44 No.4
last few decades. In this study, the lyophilized cells of Pleurotus eryngii (mushroom) were used as an inexpensive biosorbent for Cd(II) and Pb(II) removal from aqueous solutions. The effect of various physicochemical factors on Cd(II) and Pb(II) biosorption such as pH (2.0-7.0), initial metal concentration ($0.0-300mg\;L^{-1}$), temperature, fungal biomass and contact time (0-120 min) were studied. Optimum pH for removal of Cd(II) and Pb(II) was 6.0, and the contact time was 45 min at room temperature. The nature of biosorbent and metal ion interaction was evaluated by Infrared (IR) spectroscopic technique. IR analysis of mushroom biomass revealed the presence of amino, carboxyl, hydroxyl and methyl groups, which are responsible for biosorption of Cd(II) and Pb(II). The maximum adsorption capacities of P. eryngii for Pb(II) and Cd(II) calculated using Langmuir adsorption isotherm were 82.0 and $16.13mg\;g^{-1}$, respectively. The adsorption isotherms for two biosorbed heavy metals were fitted well with Freundlich isotherm as well as Langmuir model with correlation coefficient ($r^2$>0.99). Thus, this study indicated that the P. eryngii is an efficient biosorbent for the removal of Cd(II) and Pb(II) from aqueous solutions.