检索结果-南通市图书馆

含液晶成分的掺杂共聚物和胆甾醇基棕榈酸盐(或酯)掺合物(英文)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光散射学报 2005年第3期 43-45页

作者： Maria-cristina popescu,Cornelia Vasile,Daniela Filip,Doina Macocinschi,Gh. Singurel Romanian Academy “Petru Poni" Institute of Macromolecular Chemistry 41 A Grigore Ghica Voda Alley Iasi Romania Romanian Academy “Petru Poni" Institute of Macromolecular Chemistry 41 A Grigore Ghica Voda Alley Iasi Romania Romanian Academy “Petru Poni" Institute of Macromolecular Chemistry 41 A Grigore Ghica Voda Alley Iasi Romania Romanian Academy “Petru Poni" Institute of Macromolecular Chemistry 41 A Grigore Ghica Voda Alley Iasi Romania “Al. I.Cuza" University Faculty of Physics Optics and Spectroscopy Department 11 Blvd. Carol I Iasi Romania

Physical blends containing macromolecular compounds and low molecular weight liquid crystals (LCs) have important applications. LCs are used as reinforcements for amorphous polymers or in display devices. The addition of LCs to amorphous polymers determines improvements in the mechanical properties of polymeric composites. Due to their mechanical anisotropy, which results from molecular alignment, the LC molecules may orient themselves in the shear field of a processing operation. Upon cooling, this orientation may impart to the composites some improvements in the mechanical properties similar with that found with fibrous reinforcements, but with the advantage that the additive acts also as a plasticizer. The glass transition temperature and the viscosity of the blend are lower than those of the starting polymer.

关键词： PEA CP cm

Role of molecular imaging in the management of patients affected by inflammatory bowel disease:State-of-the-art

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Radiology 2016年第10期8卷 829-845页

作者： Federico Caobelli Laura Evangelista Natale Quartuccio Demetrio Familiari Corinna Altini Angelo Castello Mariapaola Cucinotta Rossella Di Dato cristina Ferrari Aurora Kokomani Iashar Laghai Riccardo Laudicella Silvia Migliari Federica Orsini Salvatore Antonio Pignata cristina popescu Erinda Puta Martina Ricci Silvia Seghezzi Alessandro Sindoni Martina Sollini Letterio Sturiale Anna Svyridenka Vittoria Vergura Pierpaolo Alongi Department of Nuclear Medicine Universitatsspital Basel Department of Nuclear Medicine Istituto Oncologico Veneto Wolfson Molecular Imaging Centre Univer-sity of Manchester Department of Nuclear Medicine A.R.N.A.S. Nuclear Medicine Unit Univer-sity"Aldo Moro"of Bari Department of Nuclear Medicine University of Florence Department of medical-surgical science and translational medicine "La Sapienza"University Nuclear Medicine Unit Department of Biomedical Sciences and Morphological and Functional ImagesUniversity of Messina Department of Nuclear Medicine University of Parma Department of Nuclear Medicine University Hospital"Maggiore della Carita di Novara" Department of Nuclear Medicine Niguarda Ca'Grande Hospital Department of Nuclear Medicine Hospital of Treviglio Humanitas University Department of Nuclear Medicine University of Bologna Nuclear Medicine Unit Department of Radio-logical SciencesG.Giglio Institute

AIM To present the current state-of-the art of molecular imaging in the management of patients affected by inflammatory bowel disease(IBD).METHODS A systematic review of the literature was performed in order to find important original articles on the role of molecular imaging in the management of patients affected by IBD. The search was updated until February 2016 and limited to articles in *** Fifty-five original articles were included in this review, highlighting the role of single photon emission tomography and positron emission tomography. CONCLUSION To date, molecular imaging represents a useful tool to detect active disease in IBD. However, the available data need to be validated in prospective multicenter studies on larger patient samples.

关键词： White blood cell scintigraphy Inflammatory bowel disease Inflammation ^(18)F-Fluorodehoxiglucose positron emission tomography/computed tomography Molecular imaging

Electrochemical Study and Electrodeposition of Copper（I） in Ionic Liquid-reline

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2013年第5期29卷 991-997页

作者： popescu Ana-Maria COJOCARU Anca DONATH cristina CONSTANTIN Virgil Laboratory of Molten Salts "Hie Murgulescu" Institute of Physical Chemistry of Romanian Academy Bucharest 060021 Romania Department of Applied Physical Chemistry and Electrochemistry University Politehnica of Bucharest Bucharest 010737 Romania

The authors made the electrochemical studies on the electrode processes during copper electrodeposition with ionic liquids-reline as an electrolytic medium. Reline is a commercial name for a eutectic mixture of choline chloride and urea（1：2, molar ratio）. This new proposed method of copper deposition is an ecological one because the ionic liquids are recyclable, non-volatile and non-toxic. Cyclic voltammetry investigations were conducted at 343 and 353 K in choline chloride-urea（Reline） deep eutectic solvent with single salt CuCl（generally in 0.05--0.38 mol/L concentration range）. Electrochemical impedance spectroscopy investigations were conducted in choline chloride- urea ionic liquid with CuCI（0.05 mol/L）. We investigated both cathodic and anodic processes of Cu＋ ions at different sweep rates in this new electrolytic system based on choline chloride. We have proposed by this an alternative to the classical copper electrodeposition. Coefficient of diffusion, Do, for the system Reline-CuCl is presented and the value of D0 is 1.22× 10^-8 cm2/s.

关键词： Ionic liquid Reline Electrodeposition Cu(I) Coefficient of diffusion

Potential roles of functional bacterial amyloid proteins,bacterial biosurfactants and other putative gut microbiota products in the etiopathogeny of Parkinson’s Disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2021年第1期45卷 1-16页

作者： EMILIA MANOLE LAURA DUMITRESCU cristina NICULIȚE BOGDAN OVIDIU popescu LAURA cristina CEAFALAN Victor Babeș”National Institute of Pathology Bucharest050088Romania Colentina Clinical Hospital Bucharest020125Romania Carol Davila”University of Medicine and Pharmacy Bucharest020021Romania

An increasing number of studies provide evidence for the existence of a microbiota-gut-brain axis and its potential involvement in the development of sporadic Parkinson’s disease and other neurodegenerative *** neuropathologic hallmark of Parkinson’s disease is the presence of brain intraneuronal aggregates of misfolded alpha-synuclein,known as Lewy *** gut microbiota products may trigger alpha-synuclein conformational changes in the neurons of the enteric nervous system,which can then spread to the brain in a prion-like fashion through the vagus *** may interfere with neuroinflammatory pathways and susceptibility to *** this review,we assess the potential role of putative gut microbiota products in the etiopathogeny of Parkinson’s disease,with a special emphasis on functional bacterial amyloid proteins,bacterial biosurfactants,endotoxins and short-chain fatty *** possible roles of molecular hydrogen,a common byproduct of bacterial fermentation,are also addressed.

关键词： Alpha-synuclein Endotoxins Short-chain fatty acids

Recovery of Metals from Anodic Dissolution Slime of Waste from Electric and Electronic Equipment（WEEE） by Extraction in Ionic Liquids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2018年第1期34卷 113-118页

作者： Ana Maria popescu Kazimir YANUSHKEVICH Vasile SOARE cristina DONATH Elena Ionela NEACSU Virgil CONSTANTIN "Ilie Murgulescu" Institute of Physical Chemistry of Romanian Academy Laboratory of Electrochemistry and Corrosion Splaiul lndependentei 202 Bucharest 060021 Romania Scientific-Practical Materials Research Centre National Academy of Belarus P. Brovki 19 str. 220072 Minsk Belarus National R&D Institute for Nonferrous and Rare Metals-IMNR 102 Biruintei Blvd. Pantelimon Ilfov County Romania

The recovery of metals from a multi-component alloy obtained by crushing, melting and anodic dissolution of waste from electric and electronic equipment（WEEE） was investigated. The anodic dissolution of the alloy was carried out in an electrolysis cell with one copper cathode and a central cast anode, immersed in the electrolyte formed by choline chloride-ethylene glycol-iodine. The temperature of the electrolyte during the process was 343 K. Depending on the electrolysis parameters（current density and cell voltage）, cathodic deposits of Sn, Pb and Zn of 〉99% purity were obtained. Cyclic voltammetry was used in order to determine the deposition potentials of the studied metals. The obtained metallic deposits were subject of determination of XRD, SEM/EDX and AFM in order to evidence the deposits structure and morphology. The experiments performed demonstrated the possibility of separating/selective recovery of metals from the multi-component alloy resulted from the waste from electrical and electronic equipment by anodic dissolution in ionic liquids.

关键词： Metals recovery Ionic liquid Waste from electric and electronic equipment(WEEE)

Timing of paracentesis and outcomes in hospitalized patients with decompensated cirrhosis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Hepatology 2020年第12期12卷 1267-1275页

作者： cristina Tocia Andrei Dumitru Luana Alexandrescu Razvan popescu Eugen Dumitru Department of Gastroenterology Constanta County Clinical Emergency HospitalConstanta 900647Romania Department of General Surgery Constanta County Clinical Emergency HospitalConstanta 900647Romania

BACKGROUND Ascites is one of the most common complications of cirrhosis,placing a significant burden on the healthcare *** regarding the optimal time of paracentesis and outcomes among patients with cirrhosis and ascites are *** To assess the outcomes of patients who underwent paracentesis within 12 h after admission compared to patients who underwent paracentesis later than 12 *** The study included 185 patients with cirrhosis and ascites who underwent *** early paracentesis group was defined as paracentesis performed12 h after admission(120 patients).Newonset complications of cirrhosis,length of hospital stay,weekday or weekend admission,in-hospital mortality rate,and 90-d readmission rates were assessed and compared between the *** Significantly more patients in the delayed paracentesis group than in the early paracentesis group developed hepatic encephalopathy(45%vs 21.5%,P<0.01),hepato-renal syndrome(21.6%vs 9.2%,P=0.03)and infections(25%vs 10.7%,P=0.02)during *** were no statistically significant differences in the occurrence of spontaneous bacterial peritonitis and upper gastrointestinal bleeding between the two *** of stay was shorter in the early paracentesis group than in the delayed paracentesis group(6.7 d vs 12.2 d)and inhospital mortality was lower among patients in the early paracentesis *** in the delayed paracentesis group had a higher risk of developing complications during *** Early paracentesis(within 12 h after admission)could be a new inpatient quality metric among patients hospitalized with cirrhosis and ascites as it is associated with fewer complications of cirrhosis,lower in-hospital mortality and shorter length of stay.

关键词： Cirrhosis Ascites Hepatic encephalopathy Spontaneous bacterial peritonitis Early paracentesis Delayed paracentesis

High-resolution impedance mapping using electrically activated quantitative phase imaging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2021年第2期10卷 186-196页

作者： cristina Polonschii Mihaela Gheorghiu Sorin David Szilveszter Gáspár Sorin Melinte Hassaan Majeed Mikhail E.Kandel Gabriel popescu Eugen Gheorghiu International Centre of Biodynamics 060101 BucharestRomania Institute of Information and Communication Technologies Electronics and Applied MathematicsUniversite Catholique de Louvain1348 Louvain-la-NeuveBelgium Quantitative Light Imaging Laboratory Beckman Institute for Advanced Science and TechnologyUniversity of Illinois at Urbana-ChampaignUrbanaIL 61801USA

Retrieving electrical impedance maps at the nanoscale rapidly via nondestructive inspection with a high signal-to-noise ratio is an unmet need,likely to impact various applications from biomedicine to energy *** this study,we develop a multimodal functional imaging instrument that is characterized by the dual capability of impedance mapping and phase quantitation,high spatial resolution,and low temporal *** achieve this,we advance a quantitative phase imaging system,referred to as epi-magnified image spatial spectrum microscopy combined with electrical actuation,to provide complementary maps of the optical path and electrical *** demonstrate our system with high-resolution maps of optical path differences and electrical impedance variations that can distinguish nanosized,semi-transparent,structured coatings involving two materials with relatively similar electrical *** map heterogeneous interfaces corresponding to an indium tin oxide layer exposed by holes with diameters as small as~550 nm in a titanium(dioxide)over-layer deposited on a glass *** show that electrical modulation during the phase imaging of a macro-electrode is decisive for retrieving electrical impedance distributions with submicron spatial resolution-and beyond the limitations of electrode-based technologies(surface or scanning technologies).The findings,which are substantiated by a theoretical model that fits the experimental data very well enable achieving electro-optical maps with high spatial and temporal *** virtues and limitations of the novel optoelectrochemical method that provides grounds for a wider range of electrically modulated optical methods for measuring the electric field locally are critically discussed.

关键词： impedance resolution phase