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Effect of starting materials and sintering temperature on microstructure and optical properties of Y203:Yb^(3+)5 at%transparent ceramics

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Journal of Advanced Ceramics 2021年第1期10卷 49-61页

作者： R.P.YAVETSKIY A.E.BALABANOV S.V.PARKHOMENKO O.S.KRYZHANOVSKA A.G.DOROSHENKO P.V.MATEYCHENKO A.V.TOLMACHEV Jiang LI Nan JIANG L.gheorghe M.ENCULESCU Institute for Single Crystals of NAS of Ukraine 60 Nauky Ave.Kharkiv 61072Ukraine Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China National Institute for Laser Plasma and Radiation PhysicsLaboratory of Solid-State Quantum ElectronicsMagurele 077125IlfovRomania National Institute of Materials Physics Magurele 077125IlfovRomania

Y2O3:Yb^(3+)5 at%ceramics have been synthesized by the reactive sintering method using different commercial yttria powders(Alfa-Micro,Alfa-Nano,and ITO-V)as raw *** has been shown that all Y2O3 starting powders consist from agglomerates up to 5-7 μm in size which are fonned from 25-60 nm primary ***-energy ball milling allows to significantly decreasing the median particle size D50 below 500 nm regardless of the commercial powders *** experiments indicate that powder mixtures fabricated from Alfa-Nano yttria powders have the highest sintering activity,while(Y0.86La0.09Yb0.05)2O3 ceramics sintered at 1750℃for 10 h are characterized by the highest transmittance of about 45%.Y2O3:Yb^(3+)ceramics have been obtained by the reactive sintering at 1750-1825℃using Alfa-Nano Y2O3 powders and La2O3+Zr02 as a complex sintering *** effects of the sintering temperature on densification processes,microstructure,and optical properties of Y2O3:Yb^(3+)5 at%ceramics have been *** has been shown that Zr^(4+)ions decrease the grain growth of Y2O3:Yb^(3+)ceramics for sintering temperatures 1750-1775℃.Further increasing the sintering temperature was accompanied by a sharp increase of the average grain size of ceramics referred to changes of structure and chemical composition of grain boundaries,as well as their *** has been determined that the optimal sintering temperature to produce high-dense yttria ceramics with transmittance of 79%-83%and average grain size of 8μm is 1800℃.Finally,laser emission at〜1030.7 nm with a slope efficiency of 10%was obtained with the most transparent Y203:Yb^(3+)5 at%ceramics sintered.

关键词： transparent ceramics reactive sintering microstructure grain growth lasing

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Fresh Rivers And Salt Springs:Modern Management And Ethno-Management Of Water Resources In Eastern Romania

Fresh Rivers And Salt Springs:Modern Management And Ethno-Ma...

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2012 International Congress on Informatics,Environment,Energy and Applications(IEEA 2012)

作者： Romanescu gheorghe Alexianu Marius Weller Olivier "Al.I.Cuza" University of Iasi Faculty of Geography and GeologyDepartment of GeographyBd.Carol I 20A700505IasiRomania Al.I.Cuza" University of Iasi Faculty of LettersBd.Carol I 11700506IasiRomania CNRS Université Paris 1 Panthéon-SorbonneUMR Trajectoires21 allée de l’Université92023Nanterre cedex-France

The present study aims to evaluate the competition between the modern management and the ethno-management of the water resources from Eastern Romania. The employment of specific hydrological, ethno-archaeological and spatial analysis methods yielded well delimited specific areas, corresponding to the levels of NaCl present in rivers and springs. The waters from the mountainous and piedmont areas of the Carpathians are directly influenced by the presence of salt deposits. The reduced salinity of the larger water arteries is due to the important liquid discharges that dilute the salts. The recent ethno-archaeological investigations that focused on the approximately 200 salt springs which were identified in the sub-Carpathian areas of Moldavia, have highlighted a well-structured ethno-management system. The modern management of the fresh water resources, developed under governmental and local communal financial support, must be continued with increased intensity. Conversely, an involvement into the ethno-management of the salt-water springs must be generally prohibited;only seldomly, in cases of uttermost necessity, can it interfere with the 8.000-years-old ethno-management of these salt-water springs.

关键词： water quality,salt springs,ethno-archaeology,ethno-management,Romania,salinity

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Endoscopic ultrasound-guided fine-needle aspiration pancreatic adenocarcinoma samples yield adequate DNA for next-generation sequencing:A cohort analysis

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World Journal of Gastroenterology 2023年第18期29卷 2864-2874页

作者： Stefania Bunduc Bianca Varzaru Razvan Andrei Iacob Andrei Sorop Ioana Manea Andreea Spiridon Raluca Chelaru Adina Emilia Croitoru Gabriel Becheanu Mona Dumbrava Simona Dima Irinel Popescu Cristian gheorghe Faculty of Medicine Carol Davila University of Medicine and PharmacyBucharest 020021Romania Digestive Diseases and Liver Transplantation Center Fundeni Clinical InstituteBucharest 022328Romania Center of Excellence in Translational Medicine Fundeni Clinical InstituteBucharest 022328Romania

BACKGROUND Genetic tests are increasingly performed for the management of unresectable pancreatic *** genotyping aimed samples current guidelines recommend using core specimens,although based on moderate quality ***,in clinical practice among the endoscopic ultrasound(EUS) guided tissue acquisition methods,fine needle aspiration(FNA) is the most widely *** To assess the adequacy for next generation sequencing(NGS) of the DNA yielded from EUS-FNA pancreatic adenocarcinoma(PDAC) *** Between November 2018 and December 2021,105 patients with PDAC confirmed by EUS-FNA were included in the study at our tertiary gastroenterology *** 22 gauge(G) or 19G FNA needles were *** pass was dedicated to DNA *** concentration and purity(A260/280,A260/230) were assessed by *** assessed the differences in DNA parameters according to needle size and tumor characteristics(size,location) and the adequacy of the extracted DNA for NGS(defined as A260/280 ≥ 1.7,and DNA yield:≥ 10 ng for amplicon based NGS,≥ 50 ng for whole exome sequencing [WES],≥ 100 ng for whole genome sequencing [WGS]) by analysis of variance and ttest ***,we compared DNA purity parameters across the different DNA yield *** Our cohort included 49% male patients,aged 67.02 ± 8.38 *** 22G needle was used in 71%of the *** DNA parameters across our samples varied as follows:DNA yield:1289 ng(inter quartile range:534.75-3101),A260/280 = 1.85(1.79-1.86),A260/230 = 2.2(1.72-2.36).DNA yield was > 10 ng in all samples and > 100 ng in 93% of them(one sample < 50 ng).There were no significant differences in the concentration and A260/280 between samples by needle *** size was the only independent predictor of A260/230 which was higher in the 22G samples(P =0.038).NGS adequacy rate was 90% for 19G samples regardless of NGS type,and for 22G samples it reached 89% for WGS adequacy and 91% for WES and

关键词： Pancreatic adenocarcinoma Endoscopic ultrasound guided fine needle aspiration Next generation sequencing DNA yield Needle size Genetic testing

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Could there be an interplay between periodontal changes and pancreatic malignancies?

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World Journal of Clinical Cases 2023年第3期11卷 545-555页

作者： Bogdan Silviu Ungureanu Dorin Nicolae gheorghe Flavia Mirela Nicolae Sandu Ramboiu Petru Adrian Radu Valeriu MarinȘurlin Victor Dan Eugen Strambu Dan Ionut Gheonea Alexandra Roman PetraȘurlin Department of Gastroenterology University of Medicine and Pharmacy of CraiovaCraiova 200349Romania Department of Periodontology Research Center of Periodontal-Systemic ImplicationsUniversity of Medicine and Pharmacy of CraiovaCraiova 200349Romania Department 1st of Surgery University of Medicine and Pharmacy of CraiovaCraiova 200349Romania Department of General Surgery “Carol Davila”University of Medicine and PharmacyBucharest 020021Romania Department of Periodontology "Iuliu Hațieganu"University of Medicine and PharmacyCluj-Napoca 400012Romania

The term"periodontal disease"refers to a group of chronic inflammatory illnesses caused by specific microorganisms from subgingival biofilm,that affect the toothsupporting *** research has also shown that periodontal infection plays a role in aggravating systemic disease states at distal sites,reinforcing the significance of the oral cavity for general ***,it has been suggested that gastroenterological malignancies may be promoted by hematogenous,enteral or lymphatic translocation of *** the past 25 years,the global burden of pancreatic cancer(PC)has more than doubled,making it one of the major causes of cancer-related *** has been linked to at least 50%increased risk of PC and it could be considered a risk factor for this malignancy.A recent study performed on 59000 African American women with a follow up of 21 years showed that participants who had poor dental health had higher chances of *** findings,according to researchers,might be related to the inflammation that some oral bacteria *** the mortality of PC,periodontitis considerably raises the chance of dying from *** alterations in the gut,oral cavity and pancreatic tissues of PC patients occur when compared to healthy flora,demonstrating a link between PC and *** may also contribute to PC development,although the underlying pathway is not yet *** function of the microbiome in PC risk has drawn more focus over the last *** risk of PC has been linked to the oral microbiome,specifically increased levels of Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans and decreased relative abundance of Leptotrichia and Fusobacteria,suggesting that it may have an impact on the inflammatory condition by expanding,altering,and regulating the commensal *** who received periodontal treatment had significantly decreased incidence rate ratios for *** analyzing patterns in

关键词： Periodontal disease Pancreatic cancer Microbiome Periodontitis Periopathogens Periodontal medicine

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PET Recycling by Asphalt Compounding

PET Recycling by Asphalt Compounding

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7th World Congress on Recovery, Recycling and Re-integration

作者： Mariana Stanica-Ezeanu gheorghe Brebeanu Dorin Stanica-Ezeanu Petroleum and Gas University 39 Bucuresti Bvd. Ploiesti Prahova 100680 Romania Petroleum and Gas University 39 Bucuresti Bvd. Ploiesti Prahova 100680 Romania Petroleum and Gas University 39 Bucuresti Bvd. Ploiesti Prahova 100680 Romania

The aim of this work is to develop secondary end use applications of waste PET by a process for improving the asphalt quality using different mixtures of oligomers obtained from waste PET by chemical depolymerization. We started the research by the depolymerization process of waste PET by glycolysis. Experiments were carried out in a continuos stirring glass reactor at a temperature of 180℃ and normal pressure. The reaction mixture consisted of 5 g of ground PET (2-5 mm), 100 mL of solvent reagent (monoethylene glycol, MEG, or polyethylene glycol, PEG) and 1% of zinc acetate as catalyst. The chemical depolymerization products were identified by gel permeation chromatography and the main products are the glycol-terephthalic acid-glycol (GTG) adduct (53 wt.%) and GTGTG (29%) "dimer" respectively. The rest is composed of different low polymerization degree compounds like GTGTGTG, GTGTGTGTG or GT esters. Finally, each type of the asphalt was mixed with different proportions (5%-30 wt%) of waste PET depolymerization products and the compounded asphalts (CA) were characterized. The CA rheological properties (softening point, penetration index, and Frass brittle point) are related with chemical characteristics of asphalt, the type of solvent agent and the quantity of depolymerization product added. An improved quality of the compounded asphalt is observed for two of three types of tested asphalt, and we suppose that chemical composition related with the type of depolymerization product (adduct) is responsible for this behavior.

关键词： recycling, PET, asphalt

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A Profile of Traumatic Brain Injury within Hospital Emergency Departments—A Retrospective Study in the Republic of Moldova

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Open Journal of Preventive Medicine 2022年第9期12卷 175-189页

作者： Svetlana Cociu Angela Cazacu-Stratu Lilia Chiosea gheorghe Rojnoveanu Serghei Cebanu Corinne Peek-Asa Department of Preventive Medicine Nicolae Testemitanu State University of Medicine and Pharmacy Chisinau Republic of Moldova Valentin Ignatenco Municipal Children Hospital Chisinau Republic of Moldova Nicolae Anestiadi Department of Surgery No.1 Nicolae Testemitanu State University of Medicine and Pharmacy Chisinau Republic of Moldova Emergency Medicine Institute Chisinau Republic of Moldova Department of Epidemiology School of Public Health University of California San Diego USA

Background: Traumatic brain injury (TBI) is a critical public health and socio-economic problem throughout the world, making epidemiological monitoring of incidence, prevalence, and outcome of TBI necessary. TBI is a major cause of mortality and morbidity in adolescents, young adults, and the elderly, one of the leading causes being road traffic accidents. Methods: A retrospective study was conducted among patients with TBI within 2 medical institutions in Chisinau municipality: Emergency Medicine Institute (EMI) and Valentin Ignatenco Municipal Children’s Hospital (MCH). A questionnaire was applied, completed on the basis of medical records according to the International Classification of Diseases (ICD) 10 codes. The collection period was August 1-October 31, 2018. Data were uploaded using the existing electronic data collection tool—Red Cap and analyzed through Microsoft Excel. Data collection was performed by a resident neurosurgery and a scientific researcher. The ethics committee’s approval has been obtained. Results: There have been identified 150 patients: 57 cases (38.5%) of TBI among children and 93 cases (61.5%) among adults aged between 18 - 73 years old. A large majority (62%) of head injuries were among patients from the urban area (most in adults—60% and males—74%). The most common mechanisms of head injury were falls (53.3%) and road traffic injuries (24%), followed by assault (14.7%) and struck by/or against (8%). The distributions by place of occurrence highlighted that most injuries occurred at home (33.4%) and in transport area (25.3%). Most head injuries were registered among men 121 (81.2%) with a predominance of minor Glasgow Coma Scale (GCS) (65.1%), followed by moderate GCS (9.4%), while in women all cases with GCS minor (18.8%). Conclusion: The data obtained could be useful for the hospital administration in managing the necessary resources and for conducting information campaigns among the high-risk groups.

关键词： Traumatic Brain Injury Emergency Departments TBI Registry Prevention

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有人说蒂米什瓦拉是罗马尼亚的上海,我想说我们可以做得更好!

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技术经济与管理研究 2006年第4期 7-10页

作者： gheorghe Ciuhandu 赵燕（翻译）蒂米什瓦拉市市长不详

虽然蒂米什瓦拉与中国相距甚远，但我们非常关注中国近几年来的发展变化。同样，我们也非常期待中国将会选择什么样的发展道路。

关键词：罗马尼亚市长南欧蒂米什瓦拉中央政府上海

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AN ABSOLUTE RADIOMETRIC EVALUATION OF THE SPECTRAL IRRADIANCE CREATED BY THE OPTICAL RADIATION SOURCES

AN ABSOLUTE RADIOMETRIC EVALUATION OF THE SPECTRAL IRRADIANC...

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International Conference on Millimeter Wave and far-Infrared Technology

作者： Valentin M.Feru gheorghe P.Ispasoiu Dan G.Sporea National Institute of Metrology Optical Radiation Measurements and Instruments Laboratory II Vitan-Birzesti Road RO - 75669 Bucharest P. O. 8 Romania National Institute of Metrology Optical Radiation Measurements and Instruments Laboratory II Vitan-Birzesti Road RO - 75669 Bucharest P. O. 8 Romania Central Institute of Physics Laser Department Bucharest P. O. Box MG - 6 Romania

＜正＞ Based on the instantaneous total response of an absolute detector and appropriate formulas, the spectral irradiance and/or spectral photon irradiance created in the test plane by the incoherent optical radiatio...

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Unified Analysis Specific to the Medical Field in the Interpretation of Medical Images through the Use of Deep Learning

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E-Health Telecommunication Systems and Networks 2021年第2期10卷 41-74页

作者： Tudor Florin Ursuleanu Andreea Roxana Luca Liliana gheorghe Roxana Grigorovici Stefan Iancu Maria Hlusneac Cristina Preda Alexandru Grigorovici Faculty of General Medicine “Grigore T. Popa” University of Medicine and Pharmacy Iasi Romania Department of Surgery VI “Sf. Spiridon” Hospital Iasi Romania Department of Surgery I Regional Institute of Oncology Iasi Romania Department of Obstetrics and Gynecology Integrated Ambulatory of Hospital “Sf. Spiridon” Iasi Romania Department of Radiology “Sf. Spiridon” Hospital Iasi Romania Department of Endocrinology “Sf. Spiridon” Hospital Iasi Romania

Deep learning (DL) has seen an exponential development in recent years, with major impact in many medical fields, especially in the field of medical image. The purpose of the work converges in determining the importance of each component, describing the specificity and correlations of these elements involved in achieving the precision of interpretation of medical images using DL. The major contribution of this work is primarily to the updated characterisation of the characteristics of the constituent elements of the deep learning process, scientific data, methods of knowledge incorporation, DL models according to the objectives for which they were designed and the presentation of medical applications in accordance with these tasks. Secondly, it describes the specific correlations between the quality, type and volume of data, the deep learning patterns used in the interpretation of diagnostic medical images and their applications in medicine. Finally presents problems and directions of future research. Data quality and volume, annotations and labels, identification and automatic extraction of specific medical terms can help deep learning models perform image analysis tasks. Moreover, the development of models capable of extracting unattended features and easily incorporated into the architecture of DL networks and the development of techniques to search for a certain network architecture according to the objectives set lead to performance in the interpretation of medical images.

关键词： Medical Image Analysis Data Types Labels Deep Learning Models

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Spinal Epidural Abscess: When a Fast Diagnosis Is Necessary

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Case Reports in Clinical Medicine 2014年第12期3卷 664-668页

作者： Joana Cosme Joana Branco Hermana Carneiro gheorghe Diviza Carlos Chagas Emília Velhinho Glória Silva Serviço Medicina III Hospital Pulido Valente Centro Hospitalar Lisboa Norte Lisboa Portugal

A 61 years old man with fatty liver disease and history of recent urinary infection was admitted to the Department of Internal Medicine for severe back pain and fever. The blood culture exams were positive for methicillin-resistant Staphylococcus aureus and later the cervical spine MRI showed an anterior epidural abscess associated with medullary compression. The patient was kept under antibiotic therapy and a decompressive surgery was required. Spinal epidural abscess presentation can be subtle with its presenting complaints ranging in severity from nonspecific back pain to marked weakness. This case report highlights the importance of an early diagnosis in order to avoid a devastating outcome.

关键词： Spinal Epidural Abscess Magnetic Resonance Imaging Early Diagnosis

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