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Nassima Djebri, Mokhtar Boutahala, Nacer-Eddine Chelali, Nadia Boukhalfa, Larbi Zeroual
In this study, acid-activated organobentonite (OAB), calcium alginate (A) and calcium alginate/acid-activated organobentonite composite beads (A-OAB) were prepared and applied for the removal of methylene blue from solutions in batch system. The zero point charge of pH (pHpzc), Scanning electron microscopy (SEM) and Fourier transformed infrared spectroscopy (FTIR) analysis were carried out. The effects of pH solution (2-11), temperature (15, 25, 35 and 45°C), initial concentration (20-500mg/L), and contact time were investigated...
November 2016: International Journal of Biological Macromolecules
Abdollah Gholami Akerdi, S Hajir Bahrami, Mokhtar Arami, Elmira Pajootan
Textile industry consumes remarkable amounts of water during various operations. A significant portion of the water discharge to environment is in the form of colored contaminant. The present research reports the photocatalytic degradation of anionic dye effluent using immobilized TiO2 nanoparticle on graphene oxide (GO) fabricated carbon electrodes. Acid Red 14 (AR 14) was used as model compound. Graphene oxide nanosheets were synthesized from graphite powder using modified Hummer's method. The nanosheets were characterized with field emission scanning electron microscope (FESEM) images, X-ray diffraction (XRD) and FTIR spectrum...
September 2016: Chemosphere
Munirah Binti Mokhtar, Hasna Binti Hashim, Sanmukh R Joshi
BACKGROUND: A use of platelet additives solution (PAS) improves storage conditions so as to give increased shelf life to platelets and to maintain hemostatic function. OBJECTIVE: The present study was aimed to compare in vitro quality of platelet rich plasma (PRP)-derived platelet concentrate (PC) during extended period of storage in plasma and in additive solution (Composol PS and Fresenius). STUDY DESIGN: Randomized 19 PCs each were used in the study for plasma and PAS as the storage medium...
January 2016: Asian Journal of Transfusion Science
Nurhidayatul Asma Mohamad, Shuhaimi Mustafa, Aly Farag El Sheikha, Nur Fadhilah Khairil Mokhtar, Amin Ismail, Md Eaqub Ali
BACKGROUND: Poor quality and quantity of DNA extracted from gelatin and gelatin capsules often causes failure in the determination of animal species using PCR. Gelatin, which is mainly derived from porcine and bovine, has been a matter of concern among customers in order to fulfill religious obligation and safety precaution against several transmissible infectious diseases associated with bovine species. Thus, optimised DNA extraction from gelatin is very important for successful real-time PCR detection of gelatin species...
May 2016: Journal of the Science of Food and Agriculture
Hatem I Mokhtar, Randa A Abdel-Salam, Ghada M Haddad
Robustness of RP-HPLC methods is a crucial method quality attribute which has gained an increasing interest throughout the efforts to apply quality by design concepts in analytical methodology. Improvement to design space modeling approaches to represent method robustness was the goal of many previous works. Modeling of design spaces regarding to method robustness fulfils quality by design essence of ensuring method validity throughout the design space. The current work aimed to describe an improvement to robustness modeling of design spaces in context of RP-HPLC method development for screening of eight antidiabetic drugs...
June 19, 2015: Journal of Chromatography. A
Tom Bond, Nurul Hana Mokhtar Kamal, Thomas Bonnisseau, Michael R Templeton
This study investigated the relative effect of chlorination and chloramination on DBP formation from seven model amine precursor compounds, representative of those commonly found in natural waters, at pH 6, 7 and 8. The quantified DBPs included chloroform, dichloroacetonitrile (DCAN), trichloroacetonitrile (TCAN) and chloropicrin (trichloronitromethane). The aggregate formation (i.e. the mass sum of the formation from the individual precursors) of chloroform, DCAN and TCAN from all precursors was reduced by respectively 75-87%, 66-90% and 89-93% when considering pre-formed monochloramine compared to chlorine...
August 15, 2014: Journal of Hazardous Materials
El-Shanshory Mohamed, Badraia Ibrahim, Donia Amr, El-Kady Noha, Mabrouk Mokhtar
BACKGROUND: Pulmonary hypertension (PHT) may be the leading cause of death in β-thalassemia patients; however, its pathophysiologic mechanisms are still unclear. Recent studies indicate that asymmetric dimethylarginine (ADMA) plays a role in the initiation and progression of a variety of diseases, especially the cardiovascular system. The aim of this study is to assess the levels of ADMA in children with β-thalassemia and their correlations with tricuspid regurgitant jet velocity. PROCEDURES: This study was carried out on 30 children with β-thalassemia major and 30 healthy children served as a control group...
September 2014: Pediatric Blood & Cancer
Elham Radaei, Mohammad Reza Alavi Moghaddam, Mokhtar Arami
BACKGROUND: In this research, response surface methodology (RSM) was applied to optimize Reactive Blue 19 removal by activated carbon from pomegranate residual. A 24 full factorial central composite design (CCD) was applied to evaluate the effects of initial pH, adsorbent dose, initial dye concentration, and contact time on the dye removal efficiency. METHODOLOGY: The activated carbon prepared by 50 wt.% phosphoric acid activation under air condition at 500°C. The range of pH and initial dye concentration were selected in a way that considered a wide range of those variables...
2014: Journal of Environmental Health Science & Engineering
Maryam Yazdani, Hajir Bahrami, Mokhtar Arami
Chitosan/feldspar biobased beads were synthesized, characterized, and tested for the removal of Acid Black 1 dye from aquatic phases. A four-factor central composite design (CCD) accompanied by response surface modeling (RSM) and optimization was used to optimize the dye adsorption by the adsorbent (chitosan/feldspar composite) in 31 different batch experiments. Independent variables of temperature, pH, initial dye concentration, and adsorbent dose were used to change to coded values. To anticipate the responses, a quadratic model was applied...
2014: TheScientificWorldJournal
Amina Habbeche, Boudjema Saoudi, Bassem Jaouadi, Soumaya Haberra, Bilal Kerouaz, Mokhtar Boudelaa, Abdelmalek Badis, Ali Ladjama
An extracellular thermostable keratinase (KERAK-29) was purified and biochemically characterized from a thermophilic actinomycete Actinomadura keratinilytica strain Cpt29 newly isolated from Algerian poultry compost. The isolate exhibited high keratinase production when grown in chicken feather meal media (24,000 U/ml). Based on matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF/MS) analysis, the purified enzyme is a monomer with a molecular mass of 29,233.10-Da. The data revealed that the 25 N-terminal residue sequence displayed by KERAK-29 was TQADPPSWGLNNIDRQTAFTKATSI, which showed high homology with those of Streptomyces proteases...
April 2014: Journal of Bioscience and Bioengineering
Mohamed El-Shanshory, Ibrahim Badraia, Amr Donia, Faten Abd El-Hameed, Mokhtar Mabrouk
BACKGROUND: Pulmonary hypertension (PH) is an increasingly recognized life-threatening complication in sickle cell disease (SCD), with associated high mortality in adults. The prevalence of PH in children with SCD is still unknown. The etiology and pathophysiologic mechanisms are still not well understood. AIM OF THE STUDY: To assess the plasma levels of asymmetric dimethylarginine (ADMA) in children with SCD and its correlation with elevated tricuspid regurgitant jet velocity and other hemolytic markers...
July 2013: European Journal of Haematology
Mokhtar Abedini, Masoumeh Sadeghi, Afsoon Emami Naini, Abdolamir Atapour, Jafar Golshahi
Pulmonary arterial hypertension (PAH) is a serious cardiac complication among patients with end-stage renal disease (ESRD). We investigated pulmonary hypertension and its associated factors among patients who were on chronic dialysis and kidney transplant recipients. One hundred-eighty patients in three groups of hemodialysis (HD), peritoneal dialysis (PD), and kidney transplant were studied. Demographic and clinical characteristics and echocardiographic findings were evaluated. A multivariable linear regression model was used to find factors associated with pulmonary artery pressure...
2013: Renal Failure
K Moussaceb, A Ait-Mokhtar, D Merabet
In this work, we investigate, on a laboratory scale, the influence of the leaching conditions on the release of various chemical elements from a cementitious material obtained by solidification of PbO, Ni2O3 and Cr2O3 with blended cement (CEMII-B32.5, according to European Standards). The pH effects on the pollutants release and the composition of the initial pore solution (target elements: chloride, sulfate, sodium, potassium, calcium, lead, chromium and nickel) were assessed through an experimental procedure consisting of two equilibrium leaching tests [the acid neutralization capacity (ANC) and the pore water (PW) tests] and the maximum mobile fraction (MMF) text...
December 2012: Environmental Technology
Mahsa Taheri, Mohammad Reza Alavi Moghaddam, Mokhtar Arami
This paper utilizes a statistical approach, the response surface optimization methodology, to determine the optimum conditions for the Acid Black 172 dye removal efficiency from aqueous solution by electrocoagulation. The experimental parameters investigated were initial pH: 4-10; initial dye concentration: 0-600 mg/L; applied current: 0.5-3.5 A and reaction time: 3-15 min. These parameters were changed at five levels according to the central composite design to evaluate their effects on decolorization through analysis of variance...
2012: Iranian Journal of Environmental Health Science & Engineering
Mior Ahmad Khushairi Mohd Zahari, Hidayah Ariffin, Mohd Noriznan Mokhtar, Jailani Salihon, Yoshihito Shirai, Mohd Ali Hassan
Factors influencing poly(3-hydroxybutyrate) P(3HB) production by Cupriavidus necator CCUG52238(T) utilizing oil palm frond (OPF) juice were clarified in this study. Effects of initial medium pH, agitation speed, and ammonium sulfate (NH(4))(2)SO(4) concentration on the production of P(3HB) were investigated in shake flasks experiments using OPF juice as the sole carbon source. The highest P(3HB) content was recorded at pH 7.0, agitation speed of 220 rpm, and (NH(4))(2)SO(4) concentration at 0.5 g/L. By culturing the wild-type strain of C...
2012: Journal of Biomedicine & Biotechnology
Ibrahim Khalil, Mohammed Moniruzzaman, Laïd Boukraâ, Mokhtar Benhanifia, Asiful Islam, Nazmul Islam, Siti Amrah Sulaiman, Siew Hua Gan
The aim of the present study was to characterize the physical, biochemical and antioxidant properties of Algerian honey samples (n = 4). Physical parameters, such as pH, moisture content, electrical conductivity (EC), total dissolved solids (TDS), color intensity, total sugar and sucrose content were measured. Several biochemical and antioxidant tests were performed to determine the antioxidant properties of the honey samples. The mean pH was 3.84 ± 0.01, and moisture the content was 13.21 ± 0.16%. The mean EC was 0...
2012: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Ana Martín-Sómer, Al Mokhtar Lamsabhi, Otilia Mó, Manuel Yáñez
The complexes formed by the interaction between a series of phosphines R-PH(2) (R = H, CH(3), c-C(3)H(5), C(6)H(5)) and AlH(3) have been investigated through the use of high-level G4 ab initio calculations. These very stable complexes behave as much stronger acids than the isolated phosphines. This dramatic acidity enhancement, which can be as high as 174 kJ mol(-1), results from a much greater stabilization of the anionic deprotonated species with respect to the neutral one, upon AlH(3) association. This effect depends quantitatively on the nature of the substituent R and is smaller for R = C(6)H(5) because of the conjugation of the P lone pair with the aromatic system...
June 28, 2012: Journal of Physical Chemistry. A
Ar Wong, Sai Mokhtar, Ahg Rasool
Anomalous origin of the right pulmonary artery is a rare form of congenital heart disease. It usually presents in early infancy with heart failure and rapid development of pulmonary hypertension. There are about 131 cases reported in the literature and we report one such case.
January 2006: Images in Paediatric Cardiology
Ahmed Khudhair Hassan, Bahruddin Saad, Sulaiman Ab Ghani, Rohana Adnan, Afidah Abdul Rahim, Norariza Ahmad, Marina Mokhtar, Suham Tawfiq Ameen, Suad Mustafa Al-Araji
Plasticised poly(vinyl chloride)-based membranes containing the ionophores (α-, β- and γ-cyclodextrins (CD), dibenzo-18-crown-6 (DB18C6) and dibenzo-30-crown-10 (DB30C10) were evaluated for their potentiometric response towards promethazine (PM) in a flow injection analysis (FIA) set-up. Good responses were obtained when β- and γ-CDs, and DB30C10 were used. The performance characteristics were further improved when tetrakis(4-chlorophenyl) borate (KTPB) was added to the membrane. The sensor based on β-CD, bis(2-ethylhexyl) adipate (BEHA) and KTPB exhibited the best performance among the eighteen sensor compositions that were tested...
2011: Sensors
Ismail Hewala, Hamed El-Fatatry, Ehab Emam, Mokhtar Mabrouk
A simple, rapid, and sensitive RP-HPLC method using photodiode array detection was developed and validated for the simultaneous determination of granisetron hydrochloride, 1-methyl-1H-indazole-3-carboxylic acid (the main degradation product of granisetron), sodium benzoate, methylparaben, propylparaben, and 4-hydroxybenzoic acid (the main degradation product of parabens) in granisetron oral drops and solutions. The separation of the compounds was achieved within 8 min on a SymmetryShield RP18 column (100 x 4...
September 2011: Journal of AOAC International
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