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Rahman, F Abdul,Naidu, J,Ngiu, CS,Yaakob, Y,Mohamed, Z,Othman, H,Jarmin, R,Elias, MH,Hamid, N Abdul,Mokhtar, N Mohd,Ali, RA Raja Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.8
Background: Hepatocellular carcinoma (HCC) is a common cancer that is frequently diagnosed at an advanced stage. Transarterial chemoembolisation (TACE) is an effective palliative treatment for patients who are not eligible for curative treatment. The two main methods for performing TACE are conventional (c-TACE) or with drug eluting beads (DEB-TACE). We sought to compare survival rates and tumour response between patients undergoing c-TACE and DEB-TACE at our centre. Materials and Methods: A retrospective cohort study of patients undergoing either treatment was carried out from January 2009 to December 2014. Tumour response to the procedures was evaluated according to the modified Response Evaluation Criteria in Solid Tumors (mRECIST). Kaplan-Meier analysis was used to assess and compare the overall survival in the two groups. Results: A total of 79 patients were analysed (34 had c-TACE, 45 had DEB-TACE) with a median follow-up of 11.8 months. A total of 20 patients in the c-TACE group (80%) and 12 patients in the DEB-TACE group (44%) died during the follow up period. The median survival durations in the c-TACE and DEB-TACE groups were $4.9{\pm}3.2$ months and $8.3{\pm}2.0$ months respectively (p=0.008). There was no statistically significant difference noted among the two groups with respect to mRECIST criteria. Conclusions: DEB-TACE demonstrated a significant improvement in overall survival rates for patients with unresectable HCC when compared to c-TACE. It is a safe and promising approach and should potentially be considered as a standard of care in the management of unresectable HCC.
ABDUL RAHMAN MOHAMED,WEI-WEN LIU,AZIZAN AZIZ,SIANG-PIAO CHAI,CHING-THIAN TYE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2009 NANO Vol.4 No.2
SWCNTs are important materials in manufacturing advanced devices like field effect transistor and field emitters. Fe2O3/MgO catalyst was developed to grow SWCNTs and was used in chemical vapor deposition (CVD) of methane. The catalyst was prepared by mixing iron powder (Fe2O3) with MgO at the prescribed stoichiometry ratio. The findings show that SWCNTs in bundle form were grown over the catalyst. Most of the observed bundles are broad with each bundle constitutes more than 20 individual SWCNTs. Raman analysis indicates that these nanotubes possessed highly graphitized structure. Comparing with other catalyst preparation methods, this approach creates better efficiency in the synthesis and reproducibility of SWCNTs in the methane CVD.
Parameter effect on photocatalytic degradation of phenol using TiO2-P25/activated carbon (AC)
Abdul Rahman Mohamed,Sze-Mun Lam,Jin-Chung Sin 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.4
P25 powder embedded and TiO2 immobilized on activated carbon (TiO2-P25/AC) was prepared by P25powder modified sol-gel and dip-coated method. The photocatalysts were characterized by XRD, BET, SEM and their photocatalytic activities were evaluated through phenol degradation in a fluidized bed photoreactor. The addition of P25 in the photocatalysts could significantly enhance the photocatalytic activity, and the optimum loading of P25 was 3 g L−1. The operating parameter results indicated that the optimum pH for phenol degradation was 5.2; the effect of air flow rate gave an optimal value of 2 L min−1; the increasing of UV light intensity led to an increase of degradation efficiency due to more photons absorbed on the surface of the photocatalyst. The kinetics of the phenol degradation fitted well with the Langmuir-Hinshelwood kinetics model. Finally, the photocatalytic ability of TiO2-P25/AC was reduced only 10% after five cycles for phenol degradation.
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Naved Azum 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this report, the doped ZnO-CdO nanoblocks (NBs) have been synthesized by facile wet-chemical technique at low-temperature and characterized by UV–vis, FT-IR, XRD, FESEM, XPS, XEDS, etc. The NBs were applied for the selective detection of Fe(III) ions and photo-catalytic degradation using Brilliant cresol blue (BCB). The analytical efficiency of NBs phase was also investigated for a selective detection of Fe(III) by ICP-OES. NBs were found to be the most selective toward Fe(III), where adsorption process was mainly monolayer on a homogeneous adsorbent surface. In photo-catalysis, almost 52.3% degradation with BCB dye was observed under solar sources with NBs.
Low dimensional Ni-ZnO nanoparticles as marker of toxic lead ions for environmental remediation
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Abdullah H. Qusti 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
We have synthesized Ni-ZnO nanoparticles (NPs) by a wet-chemical route using reducing agents. Thestructural and optical properties of Ni-ZnO NPs were investigated by various conventional methods. Theanalytical potential of the Ni-ZnO NPs was studied for a selective detection of toxic Pb(II) ion usingrecognized ICP-OES method for environmental remediation. Data obtained from the selectivity studyindicated that the selectivity of Ni-ZnO NPs phase was the most toward Pb(II) ion. However, theadsorption isotherm data of Pb(II) on Ni-ZnO NPs phase was good-match with the Langmuir-Adsorption-Isotherm, strongly supporting that the adsorption process was mainly monolayer on homogeneousadsorbent surfaces.
Pseudomyogenic Hemangioendothelioma Involving the Esophagus: A Case Report
Abdul-Rahman Fadi Diab,Salam Saleh Daradkeh,Alaa Mohammed Hassouneh,Ali Mousa Alabbadi 대한흉부외과학회 2021 Journal of Chest Surgery (J Chest Surg) Vol.54 No.6
Herein, we describe the case of a 20-year-old woman who presented with dysphagia of 2 months’ duration associated with vomiting, moderate abdominal pain, decreased oral intake, and significant weight loss. During the past 3 years, the patient experienced inter- mittent mild abdominal pain with infrequent vomiting. Endoscopy at Jordan University Hospital showed a mass in the esophagus, and endoscopic biopsies were performed. The preliminary histopathological report excluded malignancy. Two days after endoscopy, the patient presented to the emergency department complaining of severely worsening pain and total dysphagia. The pain persisted despite intravenous paracetamol administration, which was concerning for esophageal perforation; therefore, an urgent surgical inter- vention was performed. The mass was removed surgically, along with a para-esophageal lymph node. The final histopathological results of the endoscopic and resected specimens supported the diagnosis of pseudomyogenic hemangioendothelioma (PMHE). This is the first case reporting esophageal involvement of PMHE.
Malik Abdul Rub,Abdullah M. Asiri,Naved Azum,Anish Khan,Aftab Aslam Parwaz Khan,Sher Bahadar Khan,Mohammed M. Rahman,Kabir-ud-Din 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
Herein we report the micellization and cloud point of an amitriptyline hydrochloride (AMT) under the influence of cationic, anionic and nonionic hydrotropes. Anionic hydrotropes were employed to know the micellar and surface behaviors, besides studying the clouding behavior of AMT drug with cationic,anionic and nonionic hydrotropes. Tensiometric study has been performed and the properties studied include the critical micelle concentration (cmc), maximum surface excess at the air/water interface (Gmax), the minimum area per of amphiphilic molecule at air/water interface (Amin), and the different thermodynamic parameters, besides clouding phenomenon. Interaction parameters of micelles (bm) and monolayer (bs) indicate that drug-hydrotrope systems show better interaction at the interface than in micelles.
Al-Mohammadi Abdul-Raouf,Zayda Mohamed Ge,Zayda Mahmoud Ge,Abdel-Rahman Adel A.-H.,Yousef Einas,Magdy Amina 한국응용생명화학회 2023 Applied Biological Chemistry (Appl Biol Chem) Vol.66 No.-
Numerous peptide drugs are currently undergoing advanced phases of clinical testing to determine their efficacy in combating antibiotic-resistant bacterial pathogens. Our aim was to prepare some novel peptides containing a modified pyrazolopyrimidine moiety and assess their activity against a set of selected bacteria in comparison to a widely used antibiotic, ciprofloxacin. In this study, eight new peptide compounds incorporating a modified pyrazolopyrimidine moiety were synthesized. Our results revealed that compounds 4 and 5, which contained only the pyrazolopyrimidine scaffold were less active than the peptide-conjugated pyrazolopyrimidines 10, 11, 13, 14, 15, and 17. The antibacterial activities of the eight novel compounds 4, 5, 10, 11, 13, 14, 15, and 17 were evaluated against a panel of bacterial strains. All the novel compounds exhibited potent antibacterial activity against Staphylococcus aureus, Enterococcus faecalis, and Pseudomonas aeruginosa strains compared to the reference antibiotic ciprofloxacin. The tested Escherichia coli strain displayed resistance against the newly synthesized compounds. Moreover, P. aeruginosa strain displayed resistance against ciprofloxacin and six of the newly synthesized compounds. Compounds 15 and 17 effectively inhibited the growth of the P. aeruginosa strain at MIC ≥ 1 μg/mL. Our results are encouraging and urge additional biological and pharmacological screening of the most active compounds against drug-resistant microbial strains.
Tye, ChingThian,Mohamed, Abdul Rahman,Bhatia, Subhash 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.5
A heterogeneous fixed bed reactor model was developed for the OCM reaction over La₂O₃/CaO catalyst. The pore diffusion resistance was found to be more important in evaluating the system performance than was the external mass transfer resistance. The model we developed was simulated under various conditions of operation. The results obtained from the simulation under isothermal operation (CH₄/O₂ = 9; T = 973 K; m_(cat)/v_(STP) = 250 kg s/㎥) gave a 2% yield for the C₂ product and a 10% selectivity for ethylene. In the membrane reactor simulation, we obtained an ethylene yield of 23% and a methane conversion of 40% at 1073 K under the optimum flux-to-methane flow rate ratio of 1.5 × 10^(-3).