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Trust Score-Based Malicious Vehicle Detection Scheme in Vehicular Network Environments
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作者 Wenming Wang Zhiquan Liu +1 位作者 Shumin Zhang Guijiang Liu 《Computers, Materials & Continua》 SCIE EI 2024年第11期2517-2545,共29页
Advancements in the vehicular network technology enable real-time interconnection,data sharing,and intelligent cooperative driving among vehicles.However,malicious vehicles providing illegal and incorrect information ... Advancements in the vehicular network technology enable real-time interconnection,data sharing,and intelligent cooperative driving among vehicles.However,malicious vehicles providing illegal and incorrect information can compromise the interests of vehicle users.Trust mechanisms serve as an effective solution to this issue.In recent years,many researchers have incorporated blockchain technology to manage and incentivize vehicle nodes,incurring significant overhead and storage requirements due to the frequent ingress and egress of vehicles within the area.In this paper,we propose a distributed vehicular network scheme based on trust scores.Specifically,the designed architecture partitions multiple vehicle regions into clusters.Then,cloud supervision systems(CSSs)verify the accuracy of the information transmitted by vehicles.Additionally,the trust scores for vehicles are calculated to reward or penalize them based on the trust evaluation model.Our proposed scheme demonstrates good scalability and effectively addresses the main cause of malicious information distribution among vehicles.Both theoretical and experimental analysis show that our scheme outperforms the compared schemes. 展开更多
关键词 DISTRIBUTED trust mechanism vehicular network privacy protection
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Noise reduction mechanism of high-speed railway box-girder bridges installed with MTMDs on top plate
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作者 Xiaoan Zhang Xiaoyun Zhang +2 位作者 Jianjin Yang Li Yang Guangtian Shi 《Railway Engineering Science》 EI 2024年第4期518-532,共15页
The issue of low-frequency structural noise radiated from high-speed railway(HSR) box-girder bridges(BGBs) is a significant challenge worldwide. Although it is known that vibrations in BGBs caused by moving trains can... The issue of low-frequency structural noise radiated from high-speed railway(HSR) box-girder bridges(BGBs) is a significant challenge worldwide. Although it is known that vibrations in BGBs caused by moving trains can be reduced by installing multiple tuned mass dampers(MTMDs) on the top plate, there is limited research on the noise reduction achieved by this method. This study aims to investigate the noise reduction mechanism of BGBs installed with MTMDs on the top plate. A sound radiation prediction model for the BGB installed with MTMDs is developed, based on the vehicle–track–bridge coupled dynamics and acoustics boundary element method. After being verified by field tested results, the prediction model is employed to study the reduction of vibration and noise of BGBs caused by the MTMDs. It is found that installing MTMDs on top plate can significantly affect the vibration distribution and sound radiation law of BGBs. However, its impact on the sound radiation caused by vibrations dominated by the global modes of BGBs is minimal. The noise reduction achieved by MTMDs is mainly through changing the acoustic radiation contributions of each plate of the bridge. In the lower frequency range, the noise reduction of BGB caused by MTMDs can be more effective if the installation of MTMDs can modify the vibration frequency and distribution of the BGB to avoid the influence of small vibrations and disperse the sound radiation from each plate. 展开更多
关键词 High-speed railway Box-girder bridge MTMDs Noise control design Noise reduction mechanism
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Hyperhomocysteinemia and Associated Biological Markers in a Congolese Population of Type 2 Diabetes Mellitus in Brazzaville
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作者 V. R. Ikia Monde A. L. M. Boumba +9 位作者 E. Mokondjimobe H. Poaty G. Loubano-Voumbi W. F. Ondongo A. G. Mayindou Kimbangu K. Onanga F. Elilie Mawa Ongoth E. Bouenizabila C. Andres H. G. Monabeka 《Open Journal of Endocrine and Metabolic Diseases》 2024年第6期123-134,共12页
The search for new biomarkers predictive of type 2 diabetes currently constitutes a research avenue in Bioclinical. Total homocysteine remains a preferred target due to its involvement in the occurrence of degenerativ... The search for new biomarkers predictive of type 2 diabetes currently constitutes a research avenue in Bioclinical. Total homocysteine remains a preferred target due to its involvement in the occurrence of degenerative complications in type 2 diabetics. The aim of this work was to study hyperhomocysteinemia and other biochemical markers associated with T2D in the Congolese population. This was an analytical case-control study carried out between October 2022 and October 2023. The study population consisted of 150 subjects including 100 T2D patients and 50 control subjects. The main clinical data were collected on a pre-established form. Homocysteine determination was carried out by the sandwich ELISA method. The other biochemical markers were measured by colorimetric enzymatic methods. Hyperhomocysteinemia was present in 27.3% (41/150) of the entire study population. Type 2 diabetics had a frequency of hyperhomocysteinemia of 36% (36/100) and control 10% (5/50) (p = 0.001). The mean hyperhomocysteinemia concentration was 31.9 μmol/l with extremes ranging from 18 to 103 μmol/l. Means of biological markers between diabetics and controls showed a statistically significant difference (p = 0.01). The risk factors associated with this HHcy were: sex (OR = 3.5), age (OR = 9.4), sedentary lifestyle (OR = 3.4) and glycosylated hemoglobin (OR = 12) with a p-value <0.05 respectively. Our results suggest that hyperhomocysteinemia can be considered as a predictive biomarker in the bioclinic of Congolese type 2 diabetic patients. 展开更多
关键词 HYPERHOMOCYSTEINEMIA Biological Markers T2DM BRAZZAVILLE
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Influence of Surgical Incision Size and Interleukin 6 in the Occurrence of Postoperative Hyperalgesia in Lubumbashi/DR Congo
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作者 Christian Tshisuz-Nawej Nadine Kibwe +11 位作者 Felly Kazadi Berenice Kamba Ruffin Nyembo Cédric Sangwa Patient Kayoyo Eric Kasamba Sebastien Mbuyi Claude Mwamba-Mulumba Berthe Barahyga Adelin Muganza Iteke Fefe Willy Arung 《Open Journal of Anesthesiology》 2024年第11期232-247,共16页
Background: It appeared that the conjunction inflammation and nerve damage (caused by surgery) generate the hyperalgesic component. But the probability of predicting hyperalgesia from the size of the surgical incision... Background: It appeared that the conjunction inflammation and nerve damage (caused by surgery) generate the hyperalgesic component. But the probability of predicting hyperalgesia from the size of the surgical incision and/or the resulting inflammatory reaction is not well elucidated. This survey aims to study the influence of the size of the surgical incision and the resulting inflammatory reaction (interleukin 6 levels) in the occurrence of postoperative hyperalgesia in the population of Lubumbashi. Methods: The present study was descriptive cross-sectional. The data collection was prospective over 5 months, from February 1, 2024 to June 30, 2024. This study included any patient over the age of 18 who underwent surgery under general anesthesia. We used indirect signs to define hyperalgesia: higher (ENS > 6) and prolonged pain, postoperative overconsumption of morphine. Results: During our survey, we collected 48 operated patients who had severe postoperative pain, 16 of whom had hyperalgesia, i.e. a prevalence of hyperalgesia of 33.33%. The size of the incision most represented was between ≥20 and i.e. 62.50%. The type of surgery most affected by hyperalgesia was laparotomy. We observed an elevation of IL6 in 87.50% of patients. The largest elevation was 8.91 times the preoperative value and the smallest was 1.04 times. Pre- and postoperative IL6 levels were not associated with hyperalgesia (p = 0.265). Only the size of the surgical incision was associated with hyperalgesia (p = 0.04). Incision size values between [20 - 30] cm were those associated with hyperalgesia (p = 0.027). The model shows that making an incision greater than or equal to 20 cm increases the patient’s risk of developing hyperalgesia by more than 7.222 times and this is statistically significant (p = 0.004). Conclusion: According to this survey, the size of the surgical incision was associated with postoperative hyperalgesia and a size of more than 20 cm increases the patient’s risk of developing hyperalgesia by more than 7.222 times. 展开更多
关键词 Postoperative Hyperalgesia Prevalence Surgical Incision Size Interleukin 6
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Genomic imbalances in esophageal carcinoma cell lines involve Wnt pathway genes 被引量:7
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作者 Jacqueline Brown Hannelie Bothma +1 位作者 Robin Veale Pascale Willem 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第24期2909-2923,共15页
AIM: To identify molecular markers shared across South African esophageal squamous cell carcinoma (ESCC) cell lines using o/togenetics, fluorescence in situ hybridization (FISH) and single nucleotide polymorphism... AIM: To identify molecular markers shared across South African esophageal squamous cell carcinoma (ESCC) cell lines using o/togenetics, fluorescence in situ hybridization (FISH) and single nucleotide polymorphism (SNP) array copy number analysis. METHODS: We used conventional cytogenetics, FISH, and multicolor FISH to characterize the chromosomal rearrangements of five ESCC cell lines established in South Africa. The whole genome copy number profile was established from 250K SNP arrays, and data was analyzed with the CNAT 4.0 and GISTIC software. tions involved the following chromosomal regions and genes: 11q13.3 (CCND1, FGF3, FGF4, FGF19, MYEOV), 8q24.21(C-MYC, FAM84B), 11q22.1-q22.3 (B[RC2, BIRC3), 5p15.2 (CTNND2), 3qll.2-q12.2 (MINA) and 18p11.32 (TYMS, YES1). The significant deletions included 1p31.2-p31.1 (CTH, GADD45a, DIRAS3), 2q22.1 (LRPIB), 3p12.1-p14.2 (FHIT), 4q22.1-q32.1 (CASP6, SMAD1), 8p23.2-q11.1 (BNIP3L) and 18q21.1-q21.2 (SMAD4, DCC). The 3p11.2 translocation breakpoint was shared across four cell lines, supporting a role for genes involved at this site, in particular, the EPHA3 gene which has previously been reported to be deleted in ESCC.CONCLUSION: The finding that a significant number of genes that were amplified (FGF3, FGF4, FGF19, CCND1 and C-MYC) or deleted (SFRP2 gene) are involved in the Wnt and fibroblast growth factor signaling pathways, suggests that these pathways may be activated in these cell lines. 展开更多
关键词 ESOPHAGUS CANCER Single nucleotide polymorphism arrays Fluorescent in situ hybridization
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Neurotensin receptor 1 overexpression in inflammatory bowel diseases and colitis-associated neoplasia 被引量:4
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作者 Xianyong Gui Shuhong Liu +1 位作者 Yuchu Yan Zuhua Gao 《World Journal of Gastroenterology》 SCIE CAS 2013年第28期4504-4510,共7页
AIM: To explore the association of neurotensin receptor 1 (NTSR1) with inflammatory bowel diseases (IBD) and colitis-associated neoplasia. METHODS: NTSR1 was detected by immunohistochemistry in clinical samples of col... AIM: To explore the association of neurotensin receptor 1 (NTSR1) with inflammatory bowel diseases (IBD) and colitis-associated neoplasia. METHODS: NTSR1 was detected by immunohistochemistry in clinical samples of colonic mucosa with IBD colitis, colitis-associated raised low-grade dysplasia (LGD) including dysplasia-associated lesions or masses (DALMs, n = 18) and adenoma-like dysplastic polyps (ALDPs, n = 4), colitis-associated high-grade dysplasia (HGD, n = 11) and colitis-associated colorectal carcinoma (CACRC, n = 13), sporadic colorectal adenomatous polyp (SAP, n = 17), and sporadic colorectal carcinoma (SCRC, n = 12). The immunoreactivity of NTSR1 was semiquantitated (as negative, 1+, 2+, and 3+) and compared among different conditions.RESULTS: NTSR1 was not detected in normal mucosa but was expressed similarly in both active and inactive colitis. LGD showed a significantly stronger expression as compared with non-dysplastic colitic mucosa, with significantly more cases showing > 2+ intensity (68.75% in LGD vs 32.26% in nondysplastic mucosa, P = 0.001). However, no significant difference existed between DALMs and ALDPs. CACRC and HGD showed a further stronger expression, with significantly more cases showing 3+ intensity than that in LGD (61.54% vs 12.50% for CACRC vs LGD, P = 0.022; 58.33% vs 12.50% for CACRC/HGD vs LGD, P = 0.015). No significant difference existed between colitis-associated and non-colitic sporadic neoplasia. CONCLUSION: NTSR1 in colonic epithelial cells is overexpressed in IBD, in a stepwise fashion with sequential progress from inflammation to dysplasia and carcinoma. 展开更多
关键词 NEUROTENSIN NEUROTENSIN receptor Inflammatory bowel diseases DYSPLASIA Colitis-associated NEOPLASIA Dysplasia-associated lesion or mass Sporadic adenoma Colorectal carcinoma
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Features of Ciguatera Fish Poisoning Cases in Hong Kong 2004-2007 被引量:3
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作者 CHUN-KWAN WONG PATRICIA HUNG +3 位作者 KELLIE L. H. LEE TINA MOK THOMAS CHUNG KAI-MAN KAM 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2008年第6期521-527,共7页
Ohjective To review the clinical features and laboratory investigations of ciguatera patients in Hong Kong between 2004 and 2007 in order to show the timely sampling of implicated fish from ciguatera victims and appli... Ohjective To review the clinical features and laboratory investigations of ciguatera patients in Hong Kong between 2004 and 2007 in order to show the timely sampling of implicated fish from ciguatera victims and application of validated mouse bioassay for confirming suspected clinical cases of ciguatera. Methods Diagnosis of the ciguatera victims was based on history of coral fish consumption and clinical presentations stated in official guidelines for clinical diagnosis of ciguatera fish poisoning in Hong Kong. Food remnants of coral fish samples were collected swiftly from ciguatera victims between 2004 and 2007 for ciguatoxins (CTXs) analysis. Results Major clinical symptoms in ciguatera patients included gastrointestinal and neurological effects including limb numbness and diarrhoea, which developed at 0.5 to 15 hours after consumption of fish. In most cases, neurological symptoms were more common than gastrointestinal symptoms. A broad range of attack rate (10%-100%) was observed in each ciguatera outbreak. Validated mouse bioassay on ether extracts of the food remnant samples confirmed that all were CTXs-positive (〈0.5 - 4.3 MU/20 mg ether extract) and directly linked to the corresponding ciguatera cases. Conclusion Consistency between clinical and laboratory analysis for ciguatera poisoning illustrates the application of laboratory mouse bioassay in a timely fashion for confirming ciguatera poisoning cases and implementing effective public health measures. With further improvement in laboratory techniques, features of ciguatera fish poisoning cases can be better defined, Further studies are needed to determine the risk of each class of CTXs (Pacific-, Indian- and Caribbean-CTXs) in Hong Kong. 展开更多
关键词 Ciguatera poisoning CIGUATOXIN Food remnants Hong Kong Mouse bioassay
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Pancreatic cancer serum biomarker PC-594:Diagnostic performance and comparison to CA19-9 被引量:3
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作者 Shawn A Ritchie Bassirou Chitou +4 位作者 Qingan Zheng Dushmanthi Jayasinghe Wei Jin Asuka Mochizuki Dayan B Goodenowe 《World Journal of Gastroenterology》 SCIE CAS 2015年第21期6604-6612,共9页
AIM:To investigate serum PC-594 fatty acid levels as a potential biomarker in North American pancreatic cancer(PaC) patients,and to compare its performance to CA19-9.METHODS:Using tandem mass spectrometry,we evaluated... AIM:To investigate serum PC-594 fatty acid levels as a potential biomarker in North American pancreatic cancer(PaC) patients,and to compare its performance to CA19-9.METHODS:Using tandem mass spectrometry,we evaluated serum PC-594 levels from 84 North American patients with confirmed PaC and 99 cancer-free control subjects.We determined CA19-9 levels by ELISA.Significance between Pa C patients and controls,and association with clinical variables was determined by analysis of variance and t-tests.Diagnostic performance was evaluated by receiver-operator characteristic(ROC)curve analysis,and PC-594 correlation with age and CA19-9 determined by regression analysis.RESULTS:Mean PC-594 levels were 3.7 times lower in Pa C patients compared to controls(P < 0.0001).The mean level in PaC patient serum was 0.76 ± 0.07 μmol/L,and the mean level in control subjects was 2.79 ± 0.15 μmol/L.There was no correlation between PC-594 and age,disease stage or gender(P > 0.05).Using 1.25 μmol/L as a PC-594 threshold produced a relative risk(RR) of 9.4(P < 0.0001,95%CI:5.0-17.7).The area under the receiver-operator characteristic curve(ROCAUC) was 0.93(95%CI:0.91-0.95) for PC-594 and 0.85(95%CI:0.82-0.88) for CA19-9.Sensitivity at 90% specificity was 87% for PC-594 and 71% for CA19-9.Six Pa C patients with CA19-9 above 35 U/m L showed normal PC-594 levels,while 24 Pa C patients with normal CA19-9 showed low PC-594 levels.Eighty-five of the 99 control subjects(86%) showed normal levels of both markers.CONCLUSION:PC-594 biomarker levels are significantly reduced in North American Pa C patients,and showed superior diagnostic performance compared to CA19-9. 展开更多
关键词 PANCREATIC cancer Risk Screening Blood FATTY acid Biomarker METABOLITE PC-594
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Histopathological profile of gastritis in adult patients seen at a referral hospital in Kenya 被引量:2
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作者 Ahmed Kalebi Farzana Rana +2 位作者 Walter Mwanda Godfrey Lule Martin Hale 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第30期4117-4121,共5页
AIM: To conduct a detailed histological study of gastritis in adult patients attending an endoscopy clinic at a Kenyan teaching and referral hospital.METHODS: Biopsy specimens from consecutive patients were examined... AIM: To conduct a detailed histological study of gastritis in adult patients attending an endoscopy clinic at a Kenyan teaching and referral hospital.METHODS: Biopsy specimens from consecutive patients were examined and graded according to the Updated Sydney System for H pylori infection, chronic inflammation, neutrophil activity, glandular atrophy and intestinal metaplasia. Also documented were gastric tissue eosinophil counts and presence of lymphoid follicles.RESULTS: The rate of the graded variables, in the antrum and corpus respectively, were as follows: H pylori infection (91%, 86%), chronic inflammation (98%, 93%), neutrophil activity (91%, 86%), glandular atrophy (57%, 15%) and intestinal metaplasia (11%, 2%). Lymphoid follicles were noted in 11% of cases. Duodenal and gastric ulcers were documented in 32% and 2% respectively. The mean eosinophil count was 5.9 ±0.74 eosinophils/ HPF and 9.58 ± 0.93 eosinophils/HPF in the corpus and antrum respectively. Significant association was found between the degree of H pylori colonisation with chronic inflammation, neutrophil activity and antral glandular atrophy. Biopsies from the antrum and corpus showed significant histopathological discordance for all the graded variables. H pylori negative cases were associated with recent antibiotic use.CONCLUSION: The study the chief cause of gastritis reaffirms that H pylori is in this environment. The majority of patients show a moderate to high degree of inflammation but a low degree of glandular atrophy and intestinal metaplasia. The study shows that interrelationships between the histological variables in this African population are similar to those found in other populations worldwide including non-African populations. 展开更多
关键词 HPYLORI GASTRITIS Stomach Gastric atrophy Intestinal metaplasia Tissue eosinophils Peptic ulcer African enigma Sydney system
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铁基粉末冶金材料烧结程度的判定 被引量:2
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作者 Thomas F. Murphy 韩凤麟(译) 《粉末冶金技术》 CAS CSCD 北大核心 2010年第2期150-154,共5页
烧结过程可改进压制-烧结的铁基材料的物理-力学性能。烧结时因扩散产生颗粒结合与合金化;随着烧结时间增长,强化材料性能。烧结的作用通过显微组织特征(诸如颗粒边界与孔隙边缘)的变化可以看出。烧结的一些改进表现为颗粒边界消失,孔... 烧结过程可改进压制-烧结的铁基材料的物理-力学性能。烧结时因扩散产生颗粒结合与合金化;随着烧结时间增长,强化材料性能。烧结的作用通过显微组织特征(诸如颗粒边界与孔隙边缘)的变化可以看出。烧结的一些改进表现为颗粒边界消失,孔隙边缘变得较平滑和颗粒间尖角特征数量减少。一般将这些特征与特性的外观和它们发生的频率一起当做是烧结程度。用众所周知的体视技术(Stereological practies)与适当制备的金相试样,可以判定烧结程度。关于判定与区分烧结程度不同的材料,将讨论3种试验方法。另外,将用烧结时间不同的铁-铜-碳预混合粉材料的图像来说明这些显微组织的变化。 展开更多
关键词 铁基粉末冶金材料 烧结 烧结程度 判定
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Facility-based constraints to exchange transfusions for neonatal hyperbilirubinemia in resource-limited settings 被引量:4
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作者 Cecilia A Mabogunje Sarah M Olaifa Bolajoko O Olusanya 《World Journal of Clinical Pediatrics》 2016年第2期182-190,共9页
Several clinical guidelines for the management of infants with severe neonatal hyperbilirubinemia recommend immediate exchange transfusion(ET) when the risk or presence of acute bilirubin encephalopathy is established... Several clinical guidelines for the management of infants with severe neonatal hyperbilirubinemia recommend immediate exchange transfusion(ET) when the risk or presence of acute bilirubin encephalopathy is established in order to prevent chronic bilirubin encephalopathy or kernicterus. However, the literature is sparse concerning the interval between the time the decision for ET is made and the actual initiation of ET, especially in low- and middle-income countries(LMICs) with significant resource constraints but high rates of ET. This paper explores the various stages and potential delays during this interval in complying with the requirement for immediate ET for the affected infants, based on the available evidence from LMICs. The vital role of intensive phototherapy, efficient laboratory and logistical support, and clinical expertise for ET are highlighted. The challenges in securing informed parental consent, especially on religious grounds, and meeting the financial burden of this emergency procedure to facilitate timely ET are examined. Secondary delays arising from posttreatment bilirubin rebound with intensive phototherapy or ET are also discussed. These potential delays can compromise the effectiveness of ET and should provide additional impetus to curtail avoidable ET in LMICs. 展开更多
关键词 BILIRUBIN ENCEPHALOPATHY KERNICTERUS INTENSIVE PHOTOTHERAPY Laboratory services NEONATAL care Developing countries
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Primary esophageal sclerosing mucoepidermoid carcinoma with “tissue eosinophilia” 被引量:2
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作者 Suman Mewa Kinoo Kapil Maharaj +2 位作者 Bhugwan Singh Michelle Govender Pratistadevi Kanaye Ramdial 《World Journal of Gastroenterology》 SCIE CAS 2014年第22期7055-7060,共6页
Mucoepidermoid carcinoma (MEC) is a rare primary esophageal malignancy. It is characterized by poor clinical recognition, pre-operative diagnostic challenges and a lack of standardized therapeutic guidelines. We repor... Mucoepidermoid carcinoma (MEC) is a rare primary esophageal malignancy. It is characterized by poor clinical recognition, pre-operative diagnostic challenges and a lack of standardized therapeutic guidelines. We report the clinicopathological features of a hitherto unreported variant of esophageal MEC, sclerosing MEC with &#x0201c;tissue eosinophilia&#x0201d;, in a mid-esophageal location in a 51-year-old female. The diagnosis of the initial biopsy was challenging, because of the small size, poor orientation and inadequate representation of the MEC components. Recognition of the resectability of the tumor prompted surgical resection and enabled a demonstration of the low grade foci containing intermediate cells, mucin pools and the hitherto undescribed presence of stromal sclerosis and tissue eosinophils in esophageal MEC. Heightened clinicopathological awareness of esophageal MEC facilitated a definitive diagnosis and patient management. Increased recognition and global documentation of esophageal sclerosing MEC with &#x0201c;tissue eosinophilia&#x0201d; is necessary to improve the understanding and diagnosis of this malignancy in this location and to improve management guidelines. 展开更多
关键词 MUCOEPIDERMOID Carcinoma SCLEROSING Tissue eosinophilia ESOPHAGUS
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防静电滤材解决纸机液压润滑系统中静电问题 被引量:2
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作者 阚超 李军 +1 位作者 CHRISTIAN Bauer 廖支援 《轻工机械》 CAS 2011年第2期45-48,52,共5页
文章介绍了纸机液压、润滑系统发现的静电现象,分析了影响静电积累的因素,列举了目前所知道的产生静电现象的方式,详细描述了一种有效解决静电问题的方法:采用防静电滤材。并给出了相应的成功应用实例,同时,文章还对其他影响静电问题的... 文章介绍了纸机液压、润滑系统发现的静电现象,分析了影响静电积累的因素,列举了目前所知道的产生静电现象的方式,详细描述了一种有效解决静电问题的方法:采用防静电滤材。并给出了相应的成功应用实例,同时,文章还对其他影响静电问题的因素进行了讨论。 展开更多
关键词 静电 纸机液压 润滑系统 防静电滤材
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Microscopic colitis as a missed cause of chronic diarrhea 被引量:2
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作者 Nooroudien Mohamed Monique Marais Juanita Bezuidenhout 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第15期1996-2002,共7页
AIM: To determine the prevalence of increased intraepithelial lymphocytes, using immunohistochemistry in patients with normal colonoscopy and near normal biopsy. METHODS: We retrospectively reviewed all non-malignant ... AIM: To determine the prevalence of increased intraepithelial lymphocytes, using immunohistochemistry in patients with normal colonoscopy and near normal biopsy. METHODS: We retrospectively reviewed all non-malignant colon mucosal biopsies between 2005 and 2007, reported as normal, chronic inflammation or melanosis coli in patients who were undergoing routine colonoscopy. Immunohistochemistry using CD3 was performed on all mucosal biopsies and an intraepithelial lymphocyte count (IEL) was determined. Cases with an IEL count of ≥ 20 IELs per 100 surface epithelial cells were correlated with demographic, clinical and follow-up data. A further subgroup was evaluated for lymphocytic colitis.RESULTS: Twenty (8.3%) of 241 cases revealed an IEL count ≥ 20. Six (2.5%) patients were identified as having lymphocytic colitis (P < 0.001), of whom, five were missed on initial evaluation (P = 0.01). Four of these five patients were labeled with diarrhea-predominant irritable bowel syndrome (IBS). On follow-up, three of the remaining 20 cases were diagnosed with malignancy (renal cell carcinoma and myelodysplastic syndrome) and one had an unknown primary tumor with multiple liver metastases. Two cases of collagenous colitis with an IEL count < 10 were included in this study. Increased IELs were not confined to patients with diarrhea as a primary presenting symptom, but were also present in patients with abdominal pain (n = 7), constipation (n = 3) and loss of weight (n = 1). CONCLUSION: Immunohistochemistry using CD3 is of value in identifying and quantifying IELs for the presence of microscopic colitis in patients with diarrheapredominant IBS. 展开更多
关键词 Microscopic colitis Lymphocytic colitis Collagenous colitis CD3 immunohistochemistry Intraepithelial lymphocytes
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Energy Efficient MAC Protocol for Wireless Full-Duplex Networks 被引量:2
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作者 Yu Song Wangdong Qi Wenchi Cheng 《China Communications》 SCIE CSCD 2018年第1期35-44,共10页
The wireless full-duplex(FD) nodes can transmit and receive at the same time using the same frequency-band. Currently, the latest FD media access control(MAC) protocols mainly focus on how to convert the physical laye... The wireless full-duplex(FD) nodes can transmit and receive at the same time using the same frequency-band. Currently, the latest FD media access control(MAC) protocols mainly focus on how to convert the physical layer gains of FD nodes to the throughput gain of wireless FD networks, but pay little attention to the energy consumptions of FD nodes. In this paper, we propose an energy efficient FD MAC protocol. According to the values of self-interference cancellation coefficients corresponding to the nodes of each FD pair and the signal propagation attenuation, the proposed protocol can adaptively select the communication mode of the FD pair between the full-duplex and half-duplex. Also, the minimum transmit power for FD nodes can be obtained to achieve high energy efficiency. We develop an analytical model to characterize the performance of our protocol. The numerical results show that the proposed MAC protocol can optimize the system throughput and reduce the transmission energy consumptions of nodes simultaneously as compared with those of the existing works. 展开更多
关键词 wireless full-duplex networks MAC protocol energy efficient self-interference cancellation coefficient
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Human parvovirus B19-associated hematopathy in HIV disease:need for clinicopathological revisit 被引量:3
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作者 Idris Abdullahi Nasir Jessy Thomas Medugu Amos Dangana 《The Journal of Biomedical Research》 CAS CSCD 2018年第1期1-2,共2页
Persons living with HIV infection occasionally suffer from anemia due to varying causes.These include the use of zidovudine,malnutrition especially vitamin B12and iron deficiency,opportunistic infections by Mycobacter... Persons living with HIV infection occasionally suffer from anemia due to varying causes.These include the use of zidovudine,malnutrition especially vitamin B12and iron deficiency,opportunistic infections by Mycobacterium tuberculosis,Pneumocystis jiroveci,and direct hematological effects of HIV infection itself within the marrow microenvironment.Persistent Parvovirus B19(B19V)infection is a clinically important and treatable etiology of anemia in HIV-infected persons. 展开更多
关键词 HIV Human parvovirus B19-associated hematopathy in HIV disease:need for clinicopathological revisit
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Viral respiratory infections among Hajj pilgrims in 2013 被引量:4
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作者 Osamah Barasheed Harunor Rashid +15 位作者 Mohammad Alfelali Mohamed Tashani Mohammad Azeem Hamid Bokhary Nadeen Kalantan Jamil Samkari Leon Heron Jen Kok Janette Taylor Haitham El Bashir Ziad A.Memish Elizabeth Haworth Edward C.Holmes Dominic E Dwyer Atif Asghar Robert Booy 《Virologica Sinica》 SCIE CAS CSCD 2014年第6期364-371,共8页
Middle East respiratory syndrome coronavirus(MERS-Co V) has emerged in the Arabian Gulf region, with its epicentre in Saudi Arabia, the host of the ‘Hajj' which is the world's the largest mass gathering. Tran... Middle East respiratory syndrome coronavirus(MERS-Co V) has emerged in the Arabian Gulf region, with its epicentre in Saudi Arabia, the host of the ‘Hajj' which is the world's the largest mass gathering. Transmission of MERS-Co V at such an event could lead to its rapid worldwide dissemination. Therefore, we studied the frequency of viruses causing influenza-like illnesses(ILI) among participants in a randomised controlled trial at the Hajj 2013. We recruited 1038 pilgrims from Saudi Arabia, Australia and Qatar during the first day of Hajj and followed them closely for four days. A nasal swab was collected from each pilgrim who developed ILI. Respiratory viruses were detected using multiplex RT-PCR. ILI occurred in 112/1038(11%) pilgrims. Their mean age was 35 years, 49(44%) were male and 35(31%) had received the influenza vaccine pre-Hajj. Forty two(38%) pilgrims had laboratory-confirmed viral infections; 28(25%) rhinovirus, 5(4%) influenza A, 2(2%) adenovirus, 2(2%) human coronavirus OC43/229 E, 2(2%) parainfluenza virus 3, 1(1%) parainfluenza virus 1, and 2(2%) dual infections. No MERS-Co V was detected in any sample. Rhinovirus was the commonest cause of ILI among Hajj pilgrims in 2013. Infection control and appropriate vaccination are necessary to prevent transmission of respiratory viruses at Hajj and other mass gatherings. 展开更多
关键词 HAJJ influenza-like illness mass GATHERING MERS-CoV PILGRIM respiratory INFECTIONS
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African origins and chronic kidney disease susceptibility in the human immunodeficiency virus era 被引量:3
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作者 Alex N Kasembeli Raquel Duarte +1 位作者 Michèle Ramsay Saraladevi Naicker 《World Journal of Nephrology》 2015年第2期295-306,共12页
Chronic kidney disease (CKD) is a major public health problem worldwide with the estimated incidence growing by approximately 6% annually. There are striking ethnic differences in the prevalence of CKD such that, in... Chronic kidney disease (CKD) is a major public health problem worldwide with the estimated incidence growing by approximately 6% annually. There are striking ethnic differences in the prevalence of CKD such that, in the United States, African Americans have the highest prevalence of CKD, four times the incidence of end stage renal disease when compared to Americans of European ancestry suggestive of genetic predisposition. Diabetes mellitus, hypertension and human immunodeficiency virus (HIV) infection are the major causes of CKD. HIV-associated nephropathy (HIVAN) is an irreversible form of CKD with considerable morbidity and mortality and is present predominantly in people of African ancestry. The APOL1 G1 and G2 alleles were more strongly associated with the risk for CKD than the previously examined MYH9 E1risk haplotype in individuals of African ancestry. A strong association was reported in HIVAN, suggesting that 50% of African Americans with two APOL1 risk alleles, if untreated, would develop HIVAN. However these two variants are not enough to cause disease. The prevailing belief is that modifying factors or second hits (including genetic hits) underlie the pathogenesis of kidney disease. This work reviews the history of genetic susceptibility of CKD and outlines current theories regarding the role for APOL1 in CKD in the HIV era. 展开更多
关键词 Chronic kidney disease GENETICS African ancestry Human immunodefciency virus APOL1 MYH9 Human immunodefciency virus-associated nephropathy
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Transposon mouse models to elucidate the genetic mechanisms of hepatitis B viral induced hepatocellular carcinoma 被引量:2
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作者 Amy P Chiu Barbara R Tschida +4 位作者 Lilian H Lo Branden S Moriarity Dewi K Rowlands David A Largaespada Vincent W Keng 《World Journal of Gastroenterology》 SCIE CAS 2015年第42期12157-12170,共14页
The major type of human liver cancer is hepatocellular carcinoma(HCC), and there are currently many risk factors that contribute to this deadly disease. The majority of HCC occurrences are associated with chronic hepa... The major type of human liver cancer is hepatocellular carcinoma(HCC), and there are currently many risk factors that contribute to this deadly disease. The majority of HCC occurrences are associated with chronic hepatitis viral infection, and hepatitis B viral(HBV) infection is currently a major health problem in Eastern Asia. Elucidating the genetic mechanisms associated with HBV-induced HCC has been difficult due to the heterogeneity and genetic complexity associated with this disease. A repertoire of animal models has been broadly used to study the pathophysiology and to develop potential treatment regimens for HBVassociated HCC. The use of these animal models has provided valuable genetic information and has been an important contributor to uncovering the factors involved in liver malignant transformation, invasion and metastasis. Recently, transposon-based mouse models are becoming more widely used in liver cancer research to interrogate the genome by forward genetics and also used to validate genes rapidly in a reverse genetic manner. Importantly, these transposon-based rapid reverse genetic mouse models could become crucial in testing potential therapeutic agents before proceeding to clinical trials in human. Therefore, this review will cover the use of transposon-based mouse models toaddress the problems of liver cancer, especially HBVassociated HCC occurrences in Asia. 展开更多
关键词 HEPATOCELLULAR carcinoma HEPATITIS B VIRUS TRANSPO
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SDS-PAGE analysis of whole cell protein and outer memrbane protein patterns of clinical isolates of Burkholderia pseudomallei 被引量:1
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作者 Aoichart Nontprasert Cheeraratana Cheeramakara +5 位作者 Sasithon Pukrittayakamee David AB Dance Ty L Pitt Michael D Smith Sirivan Vanijanonta Nicholas J White 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2009年第5期14-19,共6页
Objective:To investigate the banding patterns of whole cell protein(WCP) and outer membrane protein (OMP) of Burkholderia pseudomallei(B.pseudomallei) in clinical isolates from patients with melioidosis. Methods:WCP a... Objective:To investigate the banding patterns of whole cell protein(WCP) and outer membrane protein (OMP) of Burkholderia pseudomallei(B.pseudomallei) in clinical isolates from patients with melioidosis. Methods:WCP and OMP of of B.pseudomallei in 50 clinical isolates,from 47 patients with melioidosis were prepared and separated by polyacrylamide gel electrophoresis(SDS-PAGE) using 10%gels and stained with Coomassie brilliant blue.The banding patterns were compared by using a laser densitometer and dendrogram. Results:There were 6 different banding patterns of WCP and 2 types of OMP.Type 1 -5 WCP had 8 common protein bands at 19.0 - 45.0 kDa with identical OMP pattern.The banding patterns of WCP in type 6 were distinct from the others and also its OMP profile.The majority of clinical isolates(37/50,74%) were in type 1 WCP.Of the remaining isolates,8 were in type 2,2 in type 3,and one each was in type 4 to 6.There was no significant association between the WCP typing and the demographic or clinical features of the investigated patients.Conclusion:Despite the wide variation of clinical features of melioidosis,the results of this study show that B.pseudomallei had a few differences in the WCP and OMP profiles.Therefore typing of WCP and OMP,using SDS-PAGE analysis,could be an alternative method for phenotypic differentiation in clinical isolates of B.pseudomallei. 展开更多
关键词 SDS-PAGE BURKHOLDERIA pseudomallei WHOLE cell PROTEIN Outer MEMBRANE PROTEIN MELIOIDOSIS
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