|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Comparative Analysis of Ti,Ni,and Au Electrodes on Characteristics of TiO_2 Nanofibers for Humidity Sensor Application显示文摘The effect of metal(Ti,Ni,and Au) electrodes on humidity sensing properties of electrospun TiO_2 nanofibers was investigated in this work.The devices were fabricated by evaporating metal contacts on SiO_2 layer thermally grown on silicon substrate.The separation between the electrodes was 90μm for all sensors.The sensors were tested from 40%to 90%relative humidity(RH) by AC electrical characterization at room temperature. When sensors are switched between 40%and 90%RH,the corresponding response and recovery time are 3 s and 5 s for Ti-electrode sensor,4 s and 7 s for Ni-electrode sensor,and 7 s and 13 s for Au-electrode sensor.The hysteresis was 3%,5%and 15%for Ti-,Ni-,and Au-electrode sensor,respectively.The sensitivity of Ti,Ni,and Au-electrode sensors are 7.53 MΩ/%RH,5.29 MΩ/%RH and 4.01 MΩ/%RH respectively at 100 Hz.Therefore Ti-electrode sensor is found to have linear response,fast response and recovery time and higher sensitivity as compared with those of Ni- and Au-electrode sensors.Comparison of humidity sensing properties of sensors with different electrode material may propose a compelling route for designing and optimizing humidity sensors. | S.S.Batool Z.Imran M.Israr Qadir M.Usman H.Jamil M.A Rafiq M.M.Hassan M.Willander | 2013 | Journal of Materials Science & Technology2013，29，5： | 3 |
| 2 | 食管肝样腺癌的肝转移误诊为肝细胞癌显示文摘Alpha-fetoprotein(AFP)-producing adenocarcinoma,histologically mimicking hepatocellular carcinoma(HCC),is a distinct entity known as hepatoid adenocarcinoma(HAC).Reported cases of HAC arising from the esophagus are extremely rare.Due to common liver metastasis and elevated AFP levels in patients with esophageal HAC,differentiation of HAC with liver metastasis from HCC could be challenging.We describe a case of esophageal HAC that presented with a liver mass showing hepatoid features and elevated serum AFP levels.Initial presentation was suspicious for HCC.Upon further diagnostic work-up,the patient was diagnosed with esophageal HAC with liver metastasis.The distinction between these two entities is particularly important because HAC is more aggressive,and its therapeutic options are very limited. | Amir Kashani Jonathan C.Ellis Melissa Kahn Laith H.Jamil | 2017 | Gastroenterology Report2017，5，1： | 1 |
| 3 | 内镜超声引导下针芯活检诊断胰腺原发性鳞状细胞癌显示文摘Primary squamous cell carcinoma(SCC)of the pancreas is a particularly rare entity.Diagnosis of this tumor is tentatively made after ruling out metastatic SCC from another primary site and adenosquamous carcinoma(ASC)of the pancreas.Here we discuss the case of a 76-year-old woman who was found to have a solitary pancreatic lesion and multiple hepatic lesions.Results of computed tomography-guided biopsy of the liver lesions were consistent with a metastatic carcinoma displaying squamous differentiation;therefore,an endoscopic ultrasound(EUS)-guided core-needle biopsy(CNB)of the pancreatic mass was performed.Meticulous histopathological examination of the pancreatic specimen at multiple levels revealed moderately well-differentiated SCC with no glandular component.An extensive metastatic work-up did not reveal an extra-pancreatic origin for this SCC;hence,a diagnosis of primary SCC of the pancreas was established.To our knowledge,this is the first report of the diagnosis of a primary SCC of the pancreas using EUS-guided CNB.We believe that CNB has a diagnostic yield equivalent to that of fine-needle aspiration for recognizing pancreatic adenocarcinoma;however,when cytological examinations reveal atypical squamous epithelial cells suggestive of malignancy,CNB may provide a better tissue specimen,from which to determine the presence of a glandular component.Such an assessment will differentiate pancreatic SCC from ASC. | Amir Kashani Melissa Kahn Laith H.Jamil | 2017 | Gastroenterology Report2017，5，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员