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| 1 | Impact of Fenton and ozone on oxidation of wastewater containing nitroaromatic compounds显示文摘Fenton and ozone treatment was investigated at laboratory scale for the degradation of aqueous solutions of nitrobenzene (NB). Effects of reactants concentration (O3, H2O2, and Fe(II)), temperature, and pH on NB degradation were monitored. Reaction kinetic of these processes was also assessed. A rapid reaction took place for Fenton process at higher initial concentration of H2O2, higher temperatures, and more acidic conditions (pH 3). Similarly, ozonation reaction exhibited rapid rates for higher ozone dose, higher temperatures, and more basic conditions (pH 11). Complete NB degradation in 65 min was achieved using Fenton process. The conditions of complete elimination of 100 mg/L of initial NB concentration, were 250 mg/L of H2O2 concentration, pH 3, and 10 mg/L of Fe(II) concentration. Under these conditions, 55% organic carbon elimination was achieved. Total organic carbon mineralization was attained in 240 min reaction time by Fenton process with 900 mg/L of H2O2 concentration, and 30 mg/L of Fe(II) concentration. Fenton reaction showed a pseudo-first order kinetic; the reaction rate constant was ranged from 0.0226 to 0.0658 min-1. Complete NB degradation was also achieved for an ozone dose of the order of 2.5 g/L. The ozonation was studied at different ozone doses, different initial pH (7–11) and at different temperatures (15–35°C ). NB ozonation kinetic was represented by a bi-molecular kinetic model which was reduced to pseudo-first order kinetic. The pseudo-first order reaction rate constant was determined to increase at 20°C from 0.004 to 0.020 min-1 as the used ozone increased from 0.4 to 1.9 g/L. | Fares Al Momani Mo’ayyad Shawaqfah Ahmad Shawaqfeh Mohammad Al-Shannag | 2008 | Journal of Environmental Sciences2008，20，6： | 13 |
| 2 | Increased expression of tumor necrosis factor-a is associated with advanced colorectal cancer stages显示文摘AIM:To detect the expression of tumor necrosis factor-a(TNF-a)in colorectal cancer(CRC)cells among Saudi patients,and correlate its expression with clinical stages of cancer.METHODS:Archival tissue specimens were collected from 30 patients with CRC who had undergone surgical intervention at King Khalid University Hospital.Patient demographic information,including age and gender,tumor sites,and histological type of CRC,was recorded.To measure TNF-a m RNA expression in CRC,total RNA was extracted from tumor formalin-fixed,paraffinembedded,and adjacent normal tissues.Reverse transcription and reverse transcription polymerase chain reaction were performed.Colorectal tissue microarrays were constructed to investigate the protein expression of TNF-a by immunohistochemistry.RESULTS:The relative expression of TNF-a m RNA in colorectal cancer was significantly higher than that seen in adjacent normal colorectal tissue.High TNF-a gene expression was associated with StageⅢandⅣneoplasms when compared with earlier tumor stages(P=0.004).Eighty-three percent of patients(25/30)showed strong TNF-a positive staining,while only 10%(n=3/30)of patients showed weak staining,and 7%(n=2/30)were negative.We showed the presence of elevated TNF-a gene expression in cancer cells,which strongly correlated with advanced stages of tumor.CONCLUSION:High levels of TNF-a expression could be an independent diagnostic indicator of colorectal cancer,and targeting TNF-a might be a promising prognostic tool by assessment of the clinical stages of CRC. | Omar A Al Obeed Khayal A Alkhayal Abdulmalik Al Sheikh Ahmad M Zubaidi Mansoor-Ali Vaali-Mohammed Robin Boushey James H Mckerrow Maha-Hamadien Abdulla | 2014 | World Journal of Gastroenterology2014，20，48： | 8 |
| 3 | Six Minute Walk Test to assess functional capacity in chronic liver disease patients显示文摘AIM: To examine the utility of Six Minute Walk Test (6MWT) in patients with chronic liver disease (CLD). METHODS: Two hundred and fifty subjects between the ages of 18 and 80 (mean 47) years performed 6MWT and the Six Minute Walk Distance (6MWD) was measured. RESULTS: The subjects were categorized into four groups. Group A (n = 45) healthy subjects (control); group B (n = 49) chronic hepatitis B patients; group C (n = 54) chronic hepatitis C patients; group D (n = 98) liver cirrhosis patients. The four groups differed in terms of 6MWDs (P < 0.001). The longest distance walked was 421 ± 47 m by group A, then group B (390 ± 53 m), group C (357 ± 72 m) and group D (306 ± 111 m). The 6MWD correlated with age (r = -0.482, P < 0.01), hemoglobin (r = +0.373, P < 0.001) and albumin (r = +0.311, P < 0.001) levels. The Child-Pugh classification was negatively correlated with the 6MWD in cirrhosis (group D) patients (r = -0.328, P < 0.01). At the end of a 12 mo follow-up period, 15 of the 98 cirrhosis patients had died from disease complications. The 6MWD for the surviving cirrhotic patients was longer than for non-survivors (317 ± 101 vs 245 ± 145 m, P = 0.021; 95% CI 11-132). The 6MWD was found to be an independent predictor of survival (P = 0.024). CONCLUSION: 6MWT is a useful tool for assessing physical function in CLD patients. We suggest that 6MWD may serve as a prognostic indicator in patients with liver cirrhosis. | Hatem F Alameri Faisal M Sanai Manal Al Dukhayil Nahla A Azzam Khalid A Al-Swat Ahmad S Hersi Ayman A Abdo | 2007 | World Journal of Gastroenterology2007，13，29： | 5 |
| 4 | Transradial approach for acute stroke intervention: technical procedure and clinical outcomes显示文摘background and purpose Radial artery catheterisation is an alternate route of access that has recently started to gain more widespread use for neuroendovascular procedures,including acute stroke intervention.In this small case series,we present our institution’s outcomes in patients undergoing acute stroke interventions via transradial access.Materials and methods We present a retrospective study of 15 patients who underwent acute stroke intervention via radial artery access.We analyse these patients’periprocedural and clinical outcomes after undergoing mechanical thrombectomy.results A total of 15 consecutive patients were included in the study(9 males and 6 females),and all patients were able to successfully undergo mechanical thrombectomy via radial artery access.The mean time of arterial puncture to reperfusion was 50±28 min(range:15-104).A TICI 2b/3 revascularisation was achieved in 13/15 patients(87%);a TICI 1 and TICI 2a outcome was achieved on the other two patients.One patient incurred an iatrogenic vessel dissection during the procedure.Eight of out 15 patients(53%)had favourable mRS(0-3)at the time of discharge from the hospital.Conclusion Radial artery catheterisation is technically feasible for performing acute stroke interventions with favourable time to revascularisation and good overall clinical outcomes. | Omaditya Khanna Nikolaos Mouchtouris Ahmad Sweid Nohra Chalouhi Ritam Ghosh Fadi Al Saiegh Michael R Gooch Stavropoula Tjoumakaris Robert H Rosenwasser Victor Romo Pascal Jabbour | 2020 | Stroke & Vascular Neurology2020，5，1： | 4 |
| 5 | Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes显示文摘Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique,followed by a grafting with fluoroalkylsilane(FAS).The crux of the matter in this paper is to study the changes in the properties of the hollow fibre membranes(gas permeation,mechanical strength,pore size,porosity,tortuosity,morphology,and contact angle)by the addition of alumina(Al2O3)to the pure kaolin with mono or multiparticle sizes.By varying the overall loading and particle size of alumina addition,different morphologies of the membranes were obtained due to the differences in the path lengths during phase inversion process for each solvent and nonsolvent exchange.The successful grafting with FAS was evidenced by the increase in contact angle from nearly equal to zero degree before grafting to 140°after grafting.Kaolin-alumina-4,one of the hollow fibres fabricated in this work,achieved a mean pore size of 0.25μm with the bending strength of 96.4 MPa and high nitrogen permeance of 2.3×10^(-5) mol·m^(-2)·Pa^(-1)·s^(-1),which makes the hollow fibre most suitable for the membrane contactor application. | Mohammed Abdulmunem ABDULHAMEED Mohd Hafiz Dzarfan OTHMAN Haider Nadhom Azziz Al JODA Ahmad Fauzi ISMAIL Takeshi MATSUURA Zawati HARUN Mukhlis A.RAHMAN Mohd Hafiz PUTEH Juhana JAAFAR | 2017 | Journal of Advanced Ceramics2017，6，4： | 3 |
| 6 | Changing patterns of hepatitis A prevalence within the Saudi population over the last 18 years显示文摘AIM: To determine the seroprevalence of Hepatitis A (HAV) amongst Saudi children and compare it with previously reported prevalence data from the same population. METHODS: A total of 1357 students were randomly selected between the ages of 16 and 18 years (689 males and 668 females) from three different regions of Saudi Arabia (Madinah, Al-Qaseem, and Aseer) and tested for anti-HAV-IgG. RESULTS: The overall prevalence of anti-HAV-IgG among the study population was 18.6%. There was no difference between males and females but there was a significant difference in the seroprevalence (P = 0.0001) between the three different regions, with Ma- dinah region showing the highest prevalence (27.4%). When classified according to socioeconomic status, lower class students had a prevalence of 36.6%, lower middle class 16.6%, upper middle class 9.6%, and up- per class 5.9% (P = 0.0001). Comparing the current study results with those of previous studies in 1989 and 1997 involving the same population, there was a marked reduction in the overall prevalence of HAV from 52% in 1989, to 25% in 1997, to 18.6% in 2008 (P < 0.0001). CONCLUSION: Over the last 18 years, there has been a marked decline in the prevalence of HAV in Saudi children and adolescents. The current low prevalence rates call for strict adherence to vaccination policies in high-risk patients and raises the question of a univer- sal HAV vaccination program. | Faleh Al Faleh Suliman Al Shehri Saleh Al Ansari Mohammed Al Jeffri Yaqoub Al Mazrou Ahmad Shaffi Ayman A Abdo | 2008 | World Journal of Gastroenterology2008，14，48： | 2 |
| 7 | Human Amnion as a Temporary Biologic Barrier after Hysteroscopic Lysis of Severe Intrauterine Adhesions: Pilot Study显示文摘 | Mohamed I. Amer Karim H.I. Abd-El-Maeboud Ihab Abdelfatah Fekrya Ahmad Salama Al Said Abdallah | 2010 | The Journal of Minimally Invasive Gynecology2010，，5： | 2 |
| 8 | Insecticide susceptibility of the dengue vector Aedes aegypti (Diptera: culicidae) in Makkah City, Saudi Arabia显示文摘 | Al Thbiani Aziz Hamady Dieng Ahmad Abu Hassan Tomomitsu Satho Fumio Miake Md Rawi Che Salmah Sazaly AbuBakar | 2011 | Asian Pacific Journal of Tropical Disease2011，，2： | 2 |
| 9 | Bromophenacyl bromide,a phospholipase A_2 inhibitor attenuates chemically induced gastroduodenal ulcers in rats显示文摘AIM: To study the effect of bromophenacyl bromide (BPB), a phospholipase A2 inhibitor on gastric secretion and to protect chemically induced gastric and duodenal ulcers in rats. METHODS: Acid secretion studies were undertaken in pylorus-ligated rats with BPB treatment (0, 5, 15 and 45 mg/kg). Gastric and duodenal lesions in the rats were induced by ethanol and cysteamine respectively. The levels of gastric wall mucus, nonprotein sulfhydryls (NP- SH) and myeloperoxidase (MPO) were also measured in the glandular stomach of rats following ethanol induced gastric lesions. RESULTS: BPB produced a dose-dependent inhibition of gastric acid secretion and acidity in rats. Pretreatment with BPB significantly attenuated the formation of etha- nol induced gastric lesion. BPB also protected intestinal mucosa against cysteamine-induced duodenal ulcers. The antiulcer activity of BPB was associated with signifi- cant inhibition of ethanol-induced depletion of gastric wall mucus, NP-SH and MPO. These findings pointed towards the mediation of sulfhydryls in BPB induced gas- trointestinal cytoprotection. CONCLUSION: BPB possesses significant antiulcer and cytoprotective activity against experimentally induced gastroduodenal lesions. | Mohammad Tariq Ibrahim Elfaki Haseeb Ahmad Khan Mohammad Arshaduddin Samia Sobki Meshal Al Moutaery | 2006 | World Journal of Gastroenterology2006，12，36： | 2 |
| 10 | Pancreatic pseudocyst or a cystic tumor of the pancreas?显示文摘Pancreatic pseudocysts are the most common cystic lesions of the pancreas and may complicate acute pancreatitis, chronic pancreatitis, or pancreatic trauma. While the majority of acute pseudocysts resolve spontaneously, few may require drainage. On the other hand, pancreatic cystic tumors, which usually require extirpation, may disguise as pseudocysts. Hence, the distinction between the two entities is crucial for a successful outcome. We conducted this study to highlight the fundamental differences between pancreatic pseudocysts and cystic tumors so that relevant management plans can be devised. We reviewed the data of patients with pancreatic cystic lesions that underwent intervention between June 2007 and December 2010 in our hospital. We identified 9 patients(5 males and 4 females) with a median age of 40 years(range, 30–70 years). Five patients had pseudocysts, 2 had cystic tumors, and 2 had diseases of undetermined pathology. Pancreatic pseudocysts were treated by pseudocystogastrostomy in 2 cases and percutaneous drainage in 3 cases. One case recurred after percutaneous drainage and required pseudocystogastrostomy. The true pancreatic cysts were serous cystadenoma, which was treated by distal pancreatectomy, and mucinous cystadenocarcinoma, which was initially treated by drainage, like a pseudocyst, and then by distal pancreatectomy when its true nature was revealed. We conclude that every effort should be exerted to distinguish between pancreatic pseudocysts and cystic tumors of the pancreas to avoid the serious misjudgement of draining rather than extirpating a pancreatic cystic tumor. Additionally, percutaneous drainage of a pancreatic pseudocyst is a useful adjunct that may substitute for surgical drainage. | Mohammad Ezzedien Rabie Ismail El Hakeem Mohammad Saad Al Skaini Ahmad El Hadad Salim Jamil Mian Tahir Shah Mahmoud Obaid | 2014 | Chinese Journal of Cancer2014，33，2： | 2 |
| 11 | Periodicals in andrology: an overview显示文摘 | Ahmad Al Aboud Khalid AI Aboud Mohammad Hakim | 2014 | Asian Journal of Andrology2014，16，4： | 2 |
| 12 | Adsorption of basic dye (methylene blue)onto activated carbon prepared from rattan saw dust显示文摘 | Hameed BH Ahmad AL Latiff KNA | | 0，，01： | 1 |
| 13 | Oryza sativa L husk as heavy metal adsorbent:Optimization with lead as model solution显示文摘 | Zulkali MMD Ahmad AL Norulakmal NH | 2006 | Bioresource Technology2006，97，3： | 1 |
| 14 | Green tea constituent epigallocatechin-3-gallate and induction of apoptosis and cell cycle arrest in human carcinoma cells显示文摘 | Ahmad N Feyes DK Nieminen AL | 1997 | Natl Cancer Inst1997，89，24： | 1 |
| 15 | Green tea constituent epigallocatechin-3-gallate and induction of apoptosis and cell cycle arrest in human carcinoma cells 显示文摘 | Ahmad N Feyes DK Nieminen AL | 1997 | J Natl Caner Inst1997，89，24： | 1 |
| 16 | Quercetin and naringenin transport across human intestinal Caco-2 cells显示文摘 | NAIT CHABANE M Al AHMAD A PELUSO J | 2009 | J Pharm Pharmacol2009，61，11： | 1 |
| 17 | Mechanism of ultraviolet B induced cell cycle arrest in G_2/M phase in immortalized skin keratinocytes with defective p53显示文摘 | Athar M Kim AL Ahmad N | 2000 | Biochem Biophys Res Commun2000，277，1： | 1 |
| 18 | Differential antiproliferative andapoptotic response of sanguinarine forcancer cells versus normal celis显示文摘 | Ahmad N Gupta S Husain MM ef al | 2000 | CUnCancer Res2000，6，4： | 1 |
| 19 | Synthesis, characterization and development of high performance si- loxane - lnodified epoxy paints 显示文摘 | AHMAD S GUPTA A P Sharmiu E el al | 2005 | Progress in Organic Coatings2005，54，3： | 1 |
| 20 | Particle swarm optimization for task assignment problem显示文摘 | Ayed Salmen Imtiaz Ahmad Sabah Al Madani | 2002 | Microprocessors and Microsystems2002，26，： | 1 |
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