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semi-quantitative Estimation of Ce3+/Ce4+Ratio in YAG:Ce3+Phosphor under Different Sintering Atmosphere

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Open Journal of Inorganic Chemistry 2015年第1期5卷 12-18页

作者： Lianming Wang Liqiang Zhuang Hao Xin Yuexia Huang Deqiang Wang Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai China

In order to confirm the relationship between the luminescence and the ratio of Ce3+/Ce4+ more clearly, a series of YAG:Ce3+ (Yttrium Aluminum Garnet, Y2.94Al5O12:0.06Ce3+) phosphors were pre- pared under different sintering atmosphere. A semi-quantitative analysis based on X-ray photoe-lectron spectroscopy (XPS) was introduced to study the mole ratio of Ce3+/Ce4+ in the as-synthesized YAG:Ce3+ phosphors. The results indicated that the percentage of Ce3+/(Ce3+ + Ce4+) reached 88.46% under the reduction atmosphere. The emission intensity of YAG:Ce3+ phosphors was in-creased significantly with the increasing of Ce3+ concentration.

关键词： YAG:Ce3+ Phosphor semi-quantitative Estimation Luminescence Ratio of Ce3+/Ce4+ XPS Reduction Atmosphere

Can semi-quantitative evaluation of uncertain (type II) time-intensity curves improve diagnosis in breast DCE-MRI?

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Journal of Biomedical Science and Engineering 2013年第3期6卷 418-425页

作者： Roberta Fusco Salvatore Filice Vincenza Granata Ylenia Mandato Annamaria Porto Massimiliano D’Aiuto Massimo Rinaldo Maurizio Di Bonito Mario Sansone Carlo Sansone Antonio Rotondo Antonella Petrillo Petrillo Department of Breast Surgery and Oncology National Cancer Institute of Naples “Pascale Foundation” Naples Italy Department of Diagnostic and Laboratory Pathology National Cancer Institute of Naples “Pascale Foundation” Naples Italy Department of Diagnostic Imaging National Cancer Institute of Naples “Pascale Foundation” Naples Italy Department of Diagnostic Imaging Second University of Naples (SUN) Naples Italy Department of Electrical Engineering and Information Technology University “Federico II” of Naples Naples Italy

Objective/Background: Qualitative assessment of uncertain (type II) time-intensity curves (TICs) in breast DCE-MRI is problematic and operator dependent. The aim of this work is to evaluate if a semi-quantitative assessment of uncertain TICs could improve overall diagnostic performance. Methods: In this study 49 lesions from 44 patients were retrospectively analysed. Per each lesion one region-of-interest (ROI)- averaged TIC was qualitatively evaluated by two radiologists in consensus: all the ROIs resulted in type II (uncertain) TIC. The same TICs were semi-quantitatively re-classified on the basis of the difference between the signal intensities of the last-time-point and of the peak: this difference was classified according to two different cut-off ranges (±5% and ±3%). All patients were cytological or histological biopsy proven. Fisher test and McNemar test were performed to evaluate if results were statistically significant (p semi-quantitative classification was compared to the histological-cytological results: the sensitivity, specificity, positive and negative predictive values obtained with ±3% were 77%, 91%, 91% and 78% respectively while using ±5% were 58%, 96%, 94% and 68% respectively. Using the ±5% cut-off 26/28 (93%) TICs were correctly reclassified while using the ±3% cut-off 34/38 (90%) TICs were correctly reclassified (p semi-quantitative methods in kinetic curve assessment on DCE-MRI could improve classification of qualitatively uncertain TICs, leading to a more accurate classification of suspicious breast lesions.

关键词： Breast Cancer Dynamic Contrast Enhanced-MRI Time Intensity Curve Tracer Kinetics semi-quantitative Analysis

Research on Fast semi-quantitative Risk Assessment Method for High Temperature and High Pressure Gas Wells

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World Journal of Engineering and Technology 2021年第1期9卷 100-108页

作者： Mifeng Zhao Hailong Geng Jingcheng Zhang Junfeng Xie Kelin Wang Petroleum Engineering Institute Petro China Tarim Oilfield Company Korla Xinjiang China

Aiming at the problem that the existing risk assessment methods in China cannot simply and accurately assess the safety risk of gas wells, a rapid semi-quantitative risk assessment method for gas wells under high temperature and pressure is studied. Based on the rapid risk assessment method of annulus well with pressure in Chevron Company and the existing risk assessment methods, the well barrier and annulus pressure of high temperature and high pressure gas wells are fully considered. A rapid semi-quantitative risk assessment method for high temperature and high pressure gas wells is established, which takes the annulus pressure value, well service life, annulus pressure recovery after pressure relief, reservoir conditions (formation pressure, production) and well CO2 and H2S content as the key risk indexes. The method is applied in a gas field, and the risk value and risk grade of a practical well are semi-quantitatively evaluated. The overall risk situation of the well is obtained. The research results provide important technical guidance for the safe production of gas well.

关键词： HPHT semi-quantitative Risk Assessment quantitative Scoring

Standardized semi-quantitative Evaluation of [123I]FP-CIT SPECT in a Multicenter Study

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Advances in Molecular Imaging 2013年第4期3卷 55-60页

作者： Andrea Skanjeti Giancarlo Castellano Baldassarre Elia Francesca Dazzara Michela Zotta Gabriela Mariam Delgado Yabar Matteo Manfredi Marco Iudicello Maurizio Zibetti Patrizia Ferrero Paola Filippi Riccardo Emanuele Pellerito Valerio Podio Neurology 1 San Luigi Gonzaga Hospital Orbassano Italy Neurology 2 San Giovanni Battista Hospital University of Turin Turin Italy Neurology 4 San Giovanni Battista Hospital University of Turin Turin Italy Neurology Maria Vittoria Hospital Turin Italy Nuclear Medicine Unit San Giovanni Battista Hospital University of Turin Turin Italy Nuclear Medicine Unit San Luigi Gonzaga Hospital University of Turin Orbassano Italy Nuclear Medicine Unit San Luigi Gonzaga Hospital University of Turin Orbassano Italy Medical Science Department University A. Avogadro Novara Italy Nuclear Medicine Unit Umberto I Hospital Turin Italy

To the best of our knowledge no multicenter studies have been published using standardized semi-quantitative evaluation of [123I]FP-CIT scan (DAT-SPECT). The aims of this study were: 1) to cross-compare semi-quantitative software-assisted evaluations of DAT-SPECTs performed in three centers with different equipments;2) to assess the accuracy of semi-quantitative evaluations of DAT-SPECT and 3) to identify the threshold with the best accuracy, sensitivity and specificity in a patient population with suspected parkinsonian syndrome. Materials and Methods: Two hundred twenty patients (mean age at the time of SPECT acquisition, 67.4 ± 9.5 yy) acquired in three centers (Ospedale San Luigi Gonzaga;Ospedale San Giovanni Battista Molinette;Ospedale Mauriziano Umberto I) were included. All of them underwent DAT-SPECT from January 2006 to July 2010. All exams were analyzed with the freely available software BASGAN and semi-quantitative data were used to predict disease. In particular, analyses were based on the values from the most deteriorated putamen and caudate, normalized for age and corrected for equipment. ROC analysis was performed and area under the curve (AUC) was estimated. Results: Analysis showed high AUCs (0.898, 0.864, 0.900 and 0.891 for each center and for the multicenter setting, respectively) confirming the very good accuracies reached. The best cut-off were 0.72 and 0.82 for putamen and caudate respectively. These thresholds allowed sensitivities and specificities in each center and in the multicenter setting of 76% and 96%, 91% and 82%, 93% and 90%, 86% and 89% respectively. No significant differences were observed between sensibility and specificity in each center. Conclusion: A unique threshold useful for all centers with high and similar sensitivities and specificities is possible after correction for age and equipments. The high accuracy reached in this multicenter trial by the semi-quantitative analysis seems similar to accuracies from qualitative ana

关键词： Movement Disorder Parkinson Disease [123I]FP-CIT-SPECT semi-quantitative Evaluation Multicenter Study

Prevalence and Risk Assessment of Campylobacter jejuni in Chicken in China

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Biomedical and Environmental Sciences 2013年第4期26卷 243-248页

作者： WANG Jun GUO Yun Chang LI Ning China National Center for Food Safety Assessment

Objective To understand the occurrence and distribution of Campylobacter jejuni in chicken in China, assess its health risk to the Chinese population, and provide recommendations for effective risk control. Methods Data from the National Food Safety Risk Surveillance Network on Campylobacter jejuni between 2007 and 2010 and from published articles were analyzed. Eleven parameters were used based on the whole chicken preparation process and prevalence of Campylobocter jejuni for risk assessment by using the Ross-Sumner Method. Results The detection rates of Campylobacterjejuni in raw chicken were between 0.29% and 2.28% during 2007-2010 in China （more than 20 provinces）. The probability of illness caused by Campylobacter jejuni due to chicken consumption was around six out of one million consumers per day in urban areas and around one out of one million consumers per day in rural areas. Total predicted illnesses per year was about 736 000, accounting for 1.6‰ of the general population in urban areas and about 301 000, accounting for 0.37‰ of the total population in rural areas. The risk rankings of Campylobocterjejuni in chicken were 52 and 49 in urban and rural areas, respectively. Conclusion A high risk score for Campylobacterjejuni in chicken was obtained in China. This result may contribute to development of food safety management strategies. Key efforts should be made to control the risk of Campylobacterjejuni in chicken in China, especially in chick breeding and chicken preparation processes.

关键词： Campylobacterjejuni Chicken semi-quantitative Risk assessment

Colloidal Gold Immunochromatographic Assay for Rapid On-Site Detection of Tetracycline in Seawater

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Journal of Ocean University of China 2023年第4期22卷 1129-1138页

作者： LI Haiping MENG Fanping LI Aifeng Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

Recently increasing concerns from the scientists and public have been paid for seawater pollution due to tetracycline(TC)overuse in maricultural ***,there are few methods or instruments that can be used for specific and rapid detection of this antibiotic in *** this study,the colloidal gold immunochromatographic assay(CG-ICA)was used to achieve this goal.A commercialized monoclonal antibody against TC(anti-TC mAb)was selected because of its higher sensitivity(half-maximal inhibitory concentration of 2.38μgL^(-1)).The prepared CG particles(average diameter of 20 nm)were used to label anti-TC mAb at pH *** conjugate pad was formed by spraying the CG-labeled anti-TC mAb on a glass fibre membrane followed by proper *** test pad was made by immobilizing artificial antigen and anti-mouse mAb in the test line and the control line,respectively,in a nitrocellulose *** test strip,assembled with sample pad,conjugate pad,test pad and absorbent pad,could be used to detect TC during seawater sample flowing through these components in *** results could be observed by the naked eye in *** visible limit of detection(vLOD)was 20μgL^(-1) for TC in *** CG-ICA test results were in good agreement with those of liquid chromatography-tandem mass spectrometry(LC-MS/MS).The assay also showed that,oxytetracycline(OTC)and chlortetracycline(CTC),as the structural analogues of TC,did not interfere with TC ***,the TC concentration given by test strip could not be affected by the fluctuation of temperature(10℃–30℃),pH(7–9)and salinity(0–40)of ***,CG-ICA is a suitable tool for rapid,on-site,and semi-quantitative detection of TC in seawater.

关键词： tetracycline(TC) seawater colloidal gold(CG) immunochromatographic assay semi-quantitative

Effects of coal rank on physicochemical properties of coal and on methane adsorption

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International Journal of Coal Science & Technology 2017年第2期4卷 129-146页

作者： Yuanping Cheng Haina Jiang Xiaolei Zhang Jiaqing Cui Cheng Song Xuanliang Li National Engineering Research Center of Coal Gas Control China University of Mining and TechnologyXuzhou 221116 Jiangsu China Faculty of Safety Engineering China University of Miningand Technology Xuzhou 221116 Jiangsu China Institute of Mining Technology Taiyuan University ofTechnology Taiyuan 030024 Shanxi China School of Environmental and Safety Engineering ChangzhouUniversity Changzhou 213164 China

For the thorough research on coal metamorphism impact on gas adsorption capacity, this paper collected and summarized parameters of experimental adsorption isotherms, coal maceral, proximate analysis and ultimate analysis obtained from National Engineering Research Center of Coal Gas Control and related literatures at home and abroad, systematically discussed the coal rank effect on its physicochemical properties and methane adsorption capacity, in which the coal rank was shown in Vitrinite reflectance, furthermore, obtained the semi-quantitative relationship between physicochemical properties of coal and methane adsorption capacity.

关键词： Coal rank Methane Physicochemical properties Adsorption Statistical analysis semi-quantitative

Medical imaging for pancreatic diseases:Prediction of severe acute pancreatitis complicated with acute respiratory distress syndrome

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World Journal of Gastroenterology 2022年第44期28卷 6206-6212页

作者： Ling-Ji Song Bo Xiao Department of Radiology Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina

In this editorial we comment on the article published in the recent issue of the World Journal of Gastroenterology[2022;28(19):2123-2136].We pay attention to how to construct a simpler and more reliable new clinical predictive model to early identify patients at high risk of acute respiratory distress syndrome(ARDS)associated with severe acute pancreatitis(SAP),and to early predict the severity of organ failure from chest computed tomography(CT)findings in SAP *** we all know,SAP has a sudden onset,is a rapidly changing condition,and can be complicated with ARDS and even multiple organ dysfunction syndrome,and its mortality rate has remained *** present,there are many clinical scoring systems for AP,including the bedside index for severity in AP,acute physiology and chronic health evaluation II,systemic inflammatory response syndrome,Japanese severe score,quick sepsis-related organ failure assessment,***,some of these scoring systems are complex and require multiple and difficult clinical parameters for risk *** the aforementioned biomarkers are readily available,their ability to predict ARDS ***,it is extremely necessary to establish a simple and valuable novel model to predict the development of ARDS in *** addition,the extra-pancreatic manifestations of AP patients often involve the chest,among which pleural effusion and pulmonary consolidation are the more common ***,by measuring the semi-quantitative indexes of chest CT in AP patients,such as the amount of pleural effusion and the number of lobes involved as pulmonary consolidation,it has important reference value for the early diagnosis of SAP complicated with ARDS and is expected to provide a basis for the early treatment of ARDS.

关键词： Severe acute pancreatitis Acute respiratory distress syndrome Clinical scoring system Prediction model semi-quantitative

ArcA Gene Expression Level of Actinobacillus pleuropneumoniae in Anaerobic Culture

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畜牧兽医学报 2009年第S1期40卷 34-38页

作者： DUAN Li-li WEN Xin-tian CAO San-jie HUANG Xiao-bo Laboratory of Animal Infectious Disease and Microarray Key Laboratory of Animal Disease and Human Health of Sichuan ProvinceCollege of Animal MedicineSichuan Agricultural University

In the present study,mRNA levels of the ArcA gene of Actinobacillus pleuropneumoniae serotype1 were measured during response to stress by growing under anaerobic *** levels were measured by semi-quantitative RT-PCR using the housekeeping gene recF as an internal *** expression of ArcA was undetectable until about 3 hours under standard culture conditions,but it was promptly and highly expressed in anaerobic *** results are consistent with ArcA being a potential virulence gene of Actinobacillus pleuropneumoniae,and likely playing an important role in pathogenesis caused by this organism.

关键词： semi-quantitative RT-PCR Actinobacillus pleuropneumoniae ArcA gene anaerobic stress