|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 考虑膨胀应力和剪胀的深埋隧道弹塑性解显示文摘基于湿度应力场理论,推导了考虑膨胀应力和剪胀特性的圆形隧道开挖后围岩力学响应的弹塑性解。将隧道软弱围岩遇水膨胀现象视为湿度-应力耦合过程,基于Fick第二定律,推导了圆形隧洞围岩内湿度扩散非稳态解。采用非关联流动法则,获得了隧道高膨胀势区的应力和位移解答。以两种不同质量岩体开挖的隧洞为例,分析了膨胀围岩应力和变形的影响因素。结果表明,考虑膨胀应力(取决于围岩含水率变化和湿度膨胀系数)时,塑性区扩大,松动圈厚度增加,应力收敛变慢。当膨胀应力增大到一定程度时,塑性区将出现拉应力区。膨胀岩隧洞开挖遇水作用,膨胀应力增加的围岩变形远大于地应力引起的围岩变形。同时,应力剪胀对膨胀性围岩的变形影响不容忽视,尤其是在支护抗力较小的情况下,洞壁处径向位移增加显著。 | 陈有亮 刘耕云 杜曦 RAFIG Azzam 吴东鹏 | 2020 | 岩土力学2020，41，8： | 12 |
| 2 | Argonaute:The executor of small RNA function显示文摘The discovery ot small non-coding RNAs- microRNA(miRNA),short interfering RNA(siRNA) and PIWIinteracting RNA(piRNA)- represents one of the most exciting frontiers in biology specifically on the mechanism of gene regulation.In order to execute their functions,these small RNAs require physical interactions with their protein partners,the Argonaute(AGO) family proteins.Over the years,numerous studies have made tremendous progress on understanding the roles of AGO in gene silencing in various organisms.In this review,we summarize recent progress of AGO-mediated gene silencing and other cellular processes in which AGO proteins have been implicated with a particular focus on progress made in flies,humans and other model organisms as compliment. | Azali Azlan Najat Dzaki Ghows Azzam | 2016 | Journal of Genetics and Genomics2016，43，8： | 10 |
| 3 | 基于LiDAR技术的节理岩质边坡有限元分析显示文摘岩质边坡的稳定性主要受其优势结构面组控制。基于地面LiDAR扫描技术和模糊聚类分析对边坡岩体出露的结构面进行自动识别和统计分组,从而获得岩体主要结构面组的几何空间信息和空间位置信息。随后通过赤平投影方法能够较好地反映出各主要结构面组与边坡的空间位置关系,确定主控边坡稳定性的优势结构面组,为数值模型的构建提供依据。最后采用有限元强度折减法求得潜在滑裂面位置和相应的安全系数。分析结果表明,岩质边坡滑裂破坏主要沿着优势结构面方向扩展,边坡下部以沿结构面的剪切破坏为主,上部以拉伸破坏为主。 | 宋杰 胡辉 RAFIG Azzam | 2013 | 岩石力学与工程学报2013，32，S2： | 9 |
| 4 | Hepatitis B genotypes: Relation to clinical outcome in patients with chronic hepatitis B in Saudi Arabia显示文摘AIM: To identify the most common hepatitis B virus (HBV) genotype in Saudi Arabia, and correlate the prevailing genotypes with the clinical outcome of patients. METHODS: Patients were consecutively recruited from the hepatology clinics of two tertiary care referral cen- ters. Patients were categorized into 4 different groups: group 1, patients with hepatitis B and normal liver en- zymes; group 2, patients with hepatitis B and abnormal liver enzymes but without cirrhosis; group 3, patients with hepatitis B and liver cirrhosis; group 4, patients with hepatitis B and hepatocellular carcinoma. All patients had a positive hepatitis B surface antigen (HBsAg). Ge- notyping of HBV was performed by nested PCR-mediated amplification of the target sequence and hybridization with sequence-specific oligonucleotides. RESULTS: Seventy patients were enrolled in this study. They were predominantly male (72.9%) in their mid- forty’s (mean age 47 years). Forty-nine (70%) patients were hepatitis B envelope antigen (HBeAg) negative. The majority of patients (64%) acquired HBV through unknown risk factors. Hepatitis B genotyping revealed that 57 patients (81.4%) were genotype D, 1 patient (1.4%) had genotype A, 1 patient (1.4%) had geno- type C, and 4 patients (5.7%) had genotype E, while 7 patients (10%) had mixed genotype (4 patients ADG, 1 patient DE, 1 patient DF, and 1 patient ADFG). Based on univariate analysis of genotype D patients, significant predictors of advanced liver disease were age, gender, aspartate transaminase, alanine transaminase, albumin,bilirubin, and alkaline phosphatase (all P < 0.001). In multivariate analysis decreased hemoglobin (r = -0.05; 95% CI: -0.08 to -0.03; P = 0.001) and albumin levels (r = -0.004; 95% CI: -0.007 to -0.001; P = 0.002) were highly significant predictors of advanced liver disease. In patients with HBV genotype D, HBeAg negativity was found to increase across advancing stages of liver dis- ease (P = 0.024). CONCLUSION: This study highlights that the vast ma- jority of Saudi patients with chronic hepatitis B have genotype D. No correlation could be observed between the different genotypes and epidemiological or clinical factors. The relationship between genotype D and HBeAg status in terms of disease severity needs to be further elucidated in larger longitudinal studies. | Ayman A Abdo Badr M Al-Jarallah Faisal M Sanai Ahmad S Hersi Khalid Al-Swat Nahla A Azzam Manal Al-Dukhayil Amira Al-Maarik Faleh Z Al-Faleh | 2006 | World Journal of Gastroenterology2006，12，43： | 7 |
| 5 | Non-alcoholic fatty liver disease-the heart of the matter显示文摘Non-alcoholic fatty liver disease(NAFLD) is one of the most common forms of chronic liver disease in the Western world. There is a close association with the metabolic syndrome and NAFLD is considered to be the hepatic manifestation of the metabolic syndrome. The components of the metabolic syndrome include hypertension,obesity and insulin resistance which are well established cardiovascular risk factors. The mortality rate of NAFLD patients from myocardial infarction is higher than that in the general United States population and there is also an increased risk of nonfatal cardiovascular events. This article reviews the cardiovascular complications associated with NAFLD. Inorder to provide comprehensive care of NAFLD patients,physicians need to be aware of,and search for,the cardiac morbidity associated with NAFLD. | Haneen Azzam Stephen Malnick | 2015 | World Journal of Hepatology2015，7，10： | 7 |
| 6 | Complications and survival in patients undergoing colonic stenting for malignant obstruction显示文摘AIM:To investigate whether predicting patients that might be at a higher risk for complications might serve to improve the selection of patients undergoing colonic stenting.METHODS:A retrospective review of consecutive patients who underwent an attempted self-expandable metal stent(SEMS)insertion for malignant colonic obstruction between November 2006 and March 2013.All patients were either referred for preoperative colonic decompression with the intent of a single surgical procedure,or for palliation of the malignant colorectal obstruction for unresectable cancer.Fisher’s test orχ2test was performed on categorical variables,and the t test for continuous variables.Univariable and multivariable logistic regression were used to examine the association between independent variables and the presence of complications from SEMS insertion.RESULTS:SEMS insertion was attempted in 73 patients.Males comprised 55.71%and the mean age was 67.41±12.41 years.Of these,65.15%underwent subsequent surgery,while 34.85%received SEMS as palliation for advanced disease.Extracolonic tumors were only4.76%.The majority of patients had stageⅣdisease(63.83%),while the remainder had stageⅢ(36.17%).SEMS were successfully inserted in 93.85%(95%CI:87.85%-99.85%).Perforations occurred in 4.10%,SEMS migration in 8.21%,and stent re-occlusion from ingrowth occurred in 2.74%of patients.The mean duration of follow up for the patients was 13.52±17.48 mo(range 0-73 mo).None of the variables:age,sex,time between the onset of symptoms to SEMS insertion,time between SEMS insertion and surgery,length of the stenosis,location of the stenosis,albumin level,or receiving neoadjuvant chemotherapy,could predict the development of complications from either SEMS insertion nor prolonged survival.CONCLUSION:None of the variables could predict the development of complications or survival.Further studies are required to identify patients who would benefit the most from SEMS. | Majid A Almadi Nahla Azzam Othman Alharbi Alabbas H Mohammed Nazia Sadaf Abdulrahman M Aljebreen | 2013 | World Journal of Gastroenterology2013，19，41： | 5 |
| 7 | Use of shear wave elastography for the diagnosis and follow-up of biliary atresia: A meta-analysis显示文摘BACKGROUND Timely differentiation of biliary atresia(BA)from other infantile cholestatic diseases can impact patient outcomes.Additionally,non-invasive staging of fibrosis after Kasai hepatoportoenterostomy has not been widely standardized.Shear wave elastography is an ultrasound modality that detects changes in tissue stiffness.The authors propose that the utility of elastography in BA can be elucidated through meta-analysis of existing studies.AIM To assess the utility of elastography in:(1)BA diagnosis,and(2)post-Kasai fibrosis surveillance.METHODS A literature search identified articles that evaluated elastography for BA diagnosis and for post-Kasai follow-up.Twenty studies met criteria for meta-analysis:Eleven for diagnosis and nine for follow-up post-Kasai.Estimated diagnostic odds ratio(DOR),sensitivity,and specificity of elastography were calculated through a random-effects model using Meta-DiSc software.RESULTS Mean liver stiffness in BA infants at diagnosis was significantly higher than in non-BA,with overall DOR 24.61,sensitivity 83%,and specificity 79%.Post-Kasai,mean liver stiffness was significantly higher in BA patients with varices than in patients without,with DOR 16.36,sensitivity 85%,and specificity 76%.Elastography differentiated stage F4 fibrosis from F0-F3 with DOR of 70.03,sensitivity 96%,and specificity 89%.Elastography also differentiated F3-F4 fibrosis from F0-F2 with DOR of 24.68,sensitivity 85%,and specificity 81%.CONCLUSION Elastography has potential as a non-invasive modality for BA diagnosis and surveillance post-Kasai.This paper’s limitations include inter-study method heterogeneity and small sample sizes.Future,standardized,multi-center studies are recommended. | Ellen S Wagner Hussien Ahmed H Abdelgawad Meghan Landry Belal Asfour Mark B Slidell Ruba Azzam | 2022 | World Journal of Gastroenterology2022，28，32： | 5 |
| 8 | 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 |
| 9 | Liver transplantation as a management of hepatocellular carcinoma显示文摘Hepatocellular carcinoma(HCC) is one of the most common cancers worldwide and has a poor prognosis if untreated. It is ranked the third among the causes of cancer-related death. There are multiple etiologic factors that can lead to HCC. Screening for early HCC is challenging due to the lack of well specific biomarkers. However,early diagnosis through successful screening is very important to provide cure rate. Liver transplantation(LT) did not gain wide acceptance until the mid-1980 s,after the effective immunosuppression withcyclosporine became available. Orthotopic LT is the best therapeutic option for early,unresectable HCC. It is limited by both,graft shortage and the need for appropriate patient selection. It provides both,the removal of tumor and the remaining cirrhotic liver. In Milan,a prospective cohort study defined restrictive selection criteria known as Milan criteria(MC) that led to superior survival for transplant patients in comparison with any other previous experience with transplantation or other options for HCC. When transplantation occurs within the established MC,the outcomes are similar to those for nonmalignant liver disease after transplantation. The shortage of organs from deceased donors has led to the problems of long waiting times and dropouts. This has led to the adoption of extended criteria by many centers. Several measures have been taken to solve these problems including prioritization of patients with HCC,use of pretransplant adjuvant treatment,and living donor LT. | Ayman Zaki Azzam | 2015 | World Journal of Hepatology2015，7，10： | 3 |
| 10 | Clinical epidemiology of ulcerative colitis in Arabs based on the Montréal classification显示文摘AIM:To determine the clinical,epidemiological and phenotypic characteristics of ulcerative colitis(UC)in Saudi Arabia by studying the largest cohort of Arab UC patients.METHODS:Data from UC patients attending gastroenterology clinics in four tertiary care centers in three cities between September 2009 and September 2013were entered into a validated web-based registry,inflammatory bowel disease information system(IBDIS).The IBDIS database covers numerous aspects of inflammatory bowel disease.Patient characteristics,disease phenotype and behavior,age at diagnosis,course of the disease,and extraintestinal manifestations were recorded.RESULTS:Among 394 UC patients,males comprised51.0%and females 49.0%.According to the Montréal classification of age,the major chunk of our patients belonged to the A2 category for age of diagnosis at17-40 years(68.4%),while 24.2%belonged to the A3category for age of diagnosis at>40 years.According to the same classification,a majority of patients had extensive UC(42.7%),35.3%had left-sided colitis and29.2%had only proctitis.Moreover,51.3%were in remission,16.6%had mild UC,23.4%had moderate UC and 8.6%had severe UC.Frequent relapse occurred in17.4%patients,infrequent relapse in 77%and 4.8%had chronic disease.A majority(85.2%)of patients was steroid responsive.With regard to extraintestinal manifestations,arthritis was present in 16.4%,osteopenia in 31.4%,osteoporosis in 17.1%and cutaneous involvement in 7.0%.CONCLUSION:The majority of UC cases were young people(17-40 years),with a male preponderance.While the disease course was found to be similar to that reported in Western countries,more similarities were found with Asian countries with regards to the extent of the disease and response to steroid therapy. | Othman R Alharbi Nahla A Azzam Ahmed S Almalki Majid A Almadi Khalid A Alswat Nazia Sadaf Abdulrahman M Aljebreen | 2014 | World Journal of Gastroenterology2014，20，46： | 2 |
| 11 | Is iron overload in alcohol-related cirrhosis mediated by hepcidin?显示文摘In this case report we describe the relationship between ferritin levels and hepcidin in a patient with alcohol-related spur cell anemia who underwent liver transplantation.We demonstrate a reciprocal relation-ship between serum or urinary hepcidin and serum ferritin,which indicates that inadequate hepcidin production by the diseased liver is associated with elevated serum ferritin.The ferritin level falls with increasing hepcidin production after transplantation.Neither inflammatory indices(IL6)nor erythropoietin appear to be related to hepcidin expression in this case.We suggest that inappropriately low hepcidin production by the cirrhotic liver may contribute substantially to elevated tissue iron stores in cirrhosis and speculate that hepcidin replacement in these patients may be of therapeutic benefi t in the future. | Tariq Iqbal Azzam Diab Douglas G Ward Matthew J Brookes Chris Tselepis Jim Murray Elwyn Elias | 2009 | World Journal of Gastroenterology2009，15，46： | 2 |
| 12 | Monomethyl fumarate augments NK cell lysis of tumor cells through degranulation and the upregulation of NKp46 and CDIO7a显示文摘Dimethyl fumarate (DMF ) 是使用到对待的新药多重硬化(MS ) 病人。这里,我们在生来的杀手(NK ) 的各种各样的活动检验了 DMF 和 DMF 代谢物 monomethyl fumarate (MMF ) 的效果房间。我们证明 MMF 扩充 K562 和 RAJI 肿瘤房间的主要 CD56 +, 然而并非 CD56 −, NK 房间细胞溶解。MMF 为 24 h 在孵化以后在 CD56 +, 然而并非 CD56 −, NK 房间的表面上导致了 NKp46 表示。这效果密切通过这代谢物从这些房间在 CD56 + NK 房间和 Granzyme B 版本的正式就职的表面上与 CD107a 表示的 upregulation 被相关。anti-NKp46 抗体通过 CD56 + NK 房间禁止了 CD107a 的导致 MMF 的 upregulation 和肿瘤房间的细胞溶解。因此,这些结果是第一证明 MMF 扩充肿瘤目标房间的 CD56 + NK 房间细胞溶解,效果通过 NKp46 调停了。这新奇效果在癌症为治疗学或预防的协议建议 MMF 的使用。 | Heidi Vego Kristin L Sand Rune A Hoglund Lars-Egil Fallang Glenn Gundersen Trygve Holmoy Azzam A Maghazachi | 2016 | Cellular & Molecular Immunology2016，13，1： | 2 |
| 13 | Strength of soil reinforced with fiber materials (Papyrus)显示文摘 | Aqeel Adili Rafig Azzam Giovanni Spagnoli Joerg Schrader | 2012 | Soil Mechanics and Foundation Engineering2012，，6： | 2 |
| 14 | 基于国际交流与合作提升土木工程专业教学质量的探索与实践显示文摘高校间的国际交流与合作是促进高校发展,提升高校教学水平的一个十分有效的途径。近年来,上海理工大学土木工程系积极与国外知名院校合作交流,为培养掌握多学科理论、具备较强实践能力、视野广阔的创新型人才奠定了基础。以和国外知名高校的交流与合作为例,总结了近几年土木工程专业教学的探索与实践,分析了当前国际合作中存在的一些问题,并提出了相应的对策建议。 | 陈有亮 徐超 倪静 马晓婷 李哲 RAFIG Azzam | 2020 | 上海理工大学学报(社会科学版)2020，42，1： | 2 |
| 15 | Prevalence and clinical features of colonic diverticulosis in a Middle Eastern population显示文摘AIM: To determine the prevalence, location, associations and clinical features of colonic-diverticulosis and its role as a cause of lower-gastroenterology-bleeding. METHODS: We retrospectively reviewed the medical records of 3649 consecutive patients who under-went a colonoscopy for all indications between 2007 and 2011 at King Khalid University Hospital, Riyadh, Saudi Arabia. The demographic data were collected retrospectively through the hospital's information system, electronic file system, endoscopic e-reports, and manual review of the files by two research assistants. The demographic information included the age, sex, comorbidities and indication for the colonoscopy. The association among colonic polyps, comorbidities and diverticular disease was also measured.RESULTS: A total of 270 patients out of 3649 were diagnosed with colonic diverticulosis, with a prevalence of 7.4%. The mean age was 60.82 years ± 0.833, (range 12-110). Females comprised 38.89% (95%CI: 33-44.7) of the study population. The major symp-toms were rectal bleeding in 33.6%, abdominal pain in 19.3%, constipation in 12.8% and anemia in 6%. Diverticula were predominantly left-sided (sigmoid and descending colon) in 62%, right-sided in 13% and in multiple locations in 25%. There was an association between the presence of diverticulosis and adenomatous polyps (Pvalue < 0.001), hypertension (P-value < 0.0001) and diabetes mellitus (P-value < 0.0016). Diverticular disease was the second most common cause of lower gastrointestinal bleeding, in 33.6% (95%CI: 27.7-39.4), after internal hemor-rhoids, in 44.6% (95%CI: 40.3-48.9). On multivariable logistic regression, hypertension (OR = 2.30; 95%CI: 1.29-4.10), rectal bleeding (OR = 2.57; 95%CI: 1.50-4.38), and per year increment in age (OR = 1.05; 95%CI: 1.03-1.07) were associated with diverticulosis but not with bleeding diverticular disease. Limitations: A small proportion of the patients included had colo-noscopies performed as a screening test.CONCLUSION: Colonic-diverticulosis was found to have a low prevalence, be predominantly left-sided and associated with adenomatous-polyps. Age, hypertension and rectal bleeding predict the presence of diverticular disease. | Nahla Azzam Abdulrahman M Aljebreen Othman Alharbi Majid A Almadi | 2013 | World Journal of Gastrointestinal Endoscopy2013，5，8： | 2 |
| 16 | Performance of American Society for Gastrointestinal Endoscopy guidelines for dyspepsia in Saudi population: Prospective observational study显示文摘AIM: To evaluate adherence of primary care physicians(PCPs) to international guidelines when referring patients for upper-gastrointestinal endoscopy(UGE), evaluate the importance of alarm symptoms and the performance of the American Society for Gastrointestinal Endoscopy(ASGE) guidelines in a Saudi population.METHODS: A prospective, observational cross-sectional study on dyspeptic patients undergoing UGE who were referred by PCPs over a 4 mo period. Refer-rals were classified as appropriate or inappropriate according to adherence to ASGE guidelines.RESULTS: Total of 221 dyspeptic patients was enrolled; 161 patients met our inclusion criteria. Mean age was 40.3 years(SD ± 18.1). Females comprised 70.1%. Alarm symptoms included low hemoglobin level(39%), weight loss(18%), vomiting(16%), loss of appetite(16%), difficulty swallowing(3%), and gastrointestinal bleeding(3%). Abnormal endoscopy findings included gastritis(52%), duodenitis(10%), hiatus hernia(7.8%), features suggestive of celiac disease(6.5%), ulcers(3.9%), malignancy(2.6%) and gastroesophageal reflux disease(GERD: 17%). Among patients who underwent UGE, 63% met ASGE guidelines, and 50% had abnormal endoscopic findings. Endoscopy was not indicated in remaining 37% of patients. Among the latter group, endoscopy was normal in 54% of patients. There was no difference in proportion of abnormal endoscopic findings between two groups(P = 0.639).CONCLUSION: Dyspeptic patients had a low prevalence of important endoscopic lesions, and none of the alarm symptoms could significantly predict abnormalendoscopic findings. | Nahla A Azzam Majid A Almadi Hessah Hamad Alamar Lamis Atyah Almalki Rehab Nawaf Alrashedi Rawabi Saleh Alghamdi Waleed Al-hamoudi | 2015 | World Journal of Gastroenterology2015，21，2： | 2 |
| 17 | 'Breathing' vesicles显示文摘 | Yu S Azzam T Rouiller I | 2009 | J Am Chem Soc2009，131，10： | 1 |
| 18 | Polarization properties of corner-cube retroreflectors: theory and experiment显示文摘 | Liu J Azzam R M A | 1997 | Applied Optics1997，36，： | 1 |
| 19 | Intracerebral cyst due to ectopic choroids plexus: case report显示文摘 | Azzam NI Timperley WR | 1981 | J Neurosurg1981，55，4： | 1 |
| 20 | Polysaccharideoligoamine based conjugates for gene delivery 显示文摘 | TONY AZZAM HAGIT ELIYAHU LIBI SHAPIRA | 2002 | J Med Chem2002，45，9： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员