检索结果-南通市图书馆

Electrochemical studies on cerium(Ⅲ) in molten fluoride mixtures

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2010年第3期28卷 428-434页

作者： vIRGIL constantin ANA-MARIA POPESCU MIRCEA OLTEANU Romanian Academy Institute of Physical Chemistry "Ilie Murgulescu"Department of Molten Salts Splaiul Independentei 202Bucharest-Romania

This study aims to determine the principal electrochemical characteristics of the electrodeposition of cerium metal from molten fluoride *** cathodic process of Ce3+ ions in LiF-NaF and LiF-NaF-CaF2 molten salts was studied using electrochemical techniques as steady state and cyclic voltammetry *** decomposition potential(Ed) and the overvoltage(η) were determined for NaCeF4 using current-potential curves under galvanostatic *** Ed was found to be 2.025 v in LiF-NaF and 2.045 v in...

关键词： cerium molten salts lanthanides NaCeF4 electrolysis cyclic voltammetry

Exploring innovative synthetic solutions for advanced polymer-based electrochromic energy storage devices:Phenoxazine as a promising chromophore

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第4期91卷 433-452页

作者： Catalin-Paul constantin Mihaela Balan-Porcarasu Gabriela Lisa “Petru Poni”Institute of Macromolecular Chemistry Electroactive Polymers&Plasmochemistry Laboratory41A Grigore Ghica Voda AlleyIasi 700487Romania “Gh.Asachi”Technical University Iasi Faculty of Chemical EngineeringBd.Mangeron 71Iasi 700050Romania

The current investigation offers an innovative synthetic solution regarding electrochromic(EC)and energy storage applications by exploring phenoxazine(POZ)***,three POZ-based polymers(polyimide,polyazomethine,and polyamide)were synthesized to ascertain the superior *** polyamide exhibited remarkable attributes,including high redox stability during 500 repetitive Cvs,optical contrast of 61.98%,rapid response times of 1.02 and 1.38 s for coloring and bleaching,EC efficiency of 280 cm^(2)C^(-1).and decays of the optical density and EC efficiency of only 12.18%and 6.23%after 1000 ***,the energy storage performance of polyamide PA was tested,for which the following parameters were obtained:74.7 F g^(-1)(Cv,scan rate of 10 mv s^(-1))and 118 F g^(-1)(GCD,charging current of 0.1 A g^(-1)).Then,the polyamide was tested in EES devices,which yielded the following EC parameters:an optical contrast of 62.15%,response times of 9.24 and 5.01 s for coloring and bleaching,EC efficiency of 178 cm^(2)C^(-1),and moderate decays of 20.25%and 23.24%for the optical density and EC efficiency after 500 *** energy storage performance included a capacitance of 106 F g^(-1)(Cv,scan rate of 0.1 mv s^(-1))and 9.23 F g^(-1)(GCD,charging current of 0.1 A g^(-1)),capacitance decay of 11.9%after500 cycles,and 1.7 v retention after 2 ***,two EES devices connected in series powered a 3 v LED for almost 30 s.

关键词： Polymers Phenoxazine Electrochromic Energy storage Electrochromi cenergy storage devices

A platform for high-repetition-rate laser experiments on the Large Plasma Device

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2018年第2期6卷 32-37页

作者： D.B.Schaeffer L.R.Hofer E.N.Knall E v.Heuer C.G.constantin C.Niemann Department of Physics and Astronomy University of California-Los AngelesLos AngelesCA 90095USA

We present a new experimental platform for studying laboratory astrophysics that combines a high-intensity, highrepetition-rate laser with the Large Plasma Device at the University of California, Los Angeles. To demonstrate the utility of this platform, we show the first results of volumetric, highly repeatable magnetic field and electrostatic potential measurements, along with derived quantities of electric field, charge density and current density, of the interaction between a super-Alfv′enic laser-produced plasma and an ambient, magnetized plasma.

关键词： high energy density physics plasmas astrophysics

Horseshoe thrombus in a patient with mechanical prosthetic mitral valve: A case report and review of literature

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2015年第9期3卷 838-842页

作者： Sanjay Mehra Assad Movahed Carlos Espinoza constantin B Marcu Department of Cardiovascular Sciences East Carolina University

Patients with prosthetic cardiac valves are at high risk for thromboembolic complications and need life long anticoagulation with warfarin, which can be associated with variable dose requirements and fluctuating level of systemic anticoagulation and may predispose to thromboembolic and or hemorrhagic complications. Prosthetic cardiac valve thrombosis is associated with high morbidity and mortality. A high index of suspicion is essential for prompt diagnosis. Transthoracic echocardiography, and if required transesophageal echocardiography are the main diagnostic imaging modalities. Medically stable patients can be managed with thrombolytic therapy and anticoagulation, while some patients may require surgical thrombectomy or valve replacement. We present a case report of a patient with prosthetic mitral valve and an unusually large left atrial thrombus with both thromboembolic and hemorrhagic complications.

关键词： Thrombosis Anticoagulation Thrombolytic therapy Transthoracic echocardiogram Prosthetic valves Transesophageal echocardiogram

Nonalcoholic fatty liver disease, metabolic risk factors, and hepatocellular carcinoma: An open question

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 Gastroenterology 2015年第14期21卷 4103-4110页

作者： Letitia Adela Maria Streba Cristin constantin vere Ion Rogoveanu Costin Teodor Streba Internal Medicine Medical SemiologyUniversity of Medicine and Pharmacy of Craiova Research Center of Gastroenterology and Hepatology of Craiova University of Medicine and Pharmacy of Craiova Internal Medicine GastroenterologyUniversity of Medicine and Pharmacy of Craiova

Non-alcoholic liver disease(NAFLD) defines liver abnormalities ranging from simple steatosis to nonalcoholic steatohepatitis with or without cirrhosis development, occurring in the absence of significant alcohol consumption, use of teratogenic medication, or hereditary *** association between NAFLD and metabolic syndrome is well documented and widely ***, type 2 diabetes mellitus(T2DM), and dyslipidemia are the most common metabolic risk factors associated with *** the components of metabolic syndrome, current evidence strongly indicates obesity and diabetes as hepatocellular carcinoma(HCC) risk *** is also growing evidence that suggests an increased risk of HCC in NAFLD patients, even surpassing other etiologies in some high-income *** data demonstrate a parallel rise in prevalence of obesity, diabetes, NAFLD, and *** obesity and its related diseases have steadily afflicted larger populations, HCC incidence is expected to increase in the *** mechanisms that underlie NAFLD development and subsequent progression to nonalcoholic steatohepatitis and cirrhosis(insulin resistance and hyperinsulinemia, oxidative stress, hepatic stellate cell activation, cytokine/adipocytokine signaling pathways, and genetic and environmental factors) appear to play a significant role in the development of NAFLD-related ***, a comprehensive view of molecular mechanisms linking obesity, T2 DM, and NAFLD-related HCC, as well as the exact sequence of molecular events, is still not understood in its ***-quality data are still necessary, and efforts should continue towards better understanding the underlying carcinogenic mechanisms of NAFLD-related *** this paper, we aimed to centralize the most important links supporting these relationships, focusing on obesity, T2 DM, and NAFLD-related HCC, as well as point out the major gaps in knowledge regarding the underlying molecular mechanisms beh

关键词： Diabetes mellitus Hepatocellular carcinoma Metabol

Primary gastric choriocarcinoma-a rare and aggressive tumor with multilineage differentiation: A case report

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 Clinical Cases 2019年第14期7卷 1837-1843页

作者： Simona Gurzu constantin Copotoiu Alexandra Tugui Cedric Kwizera Rita Szodorai Ioan Jung Department of Pathology University of MedicinePharmacySciences and TechnologyTargu Mures 530149Romania Research Center (CCAMF) University of MedicinePharmacySciences and TechnologyTargu Mures 540139Romania Department of Surgery University of MedicinePharmacySciences and TechnologyTargu Mures 530149Romania

BACKGROUND Primary choriocarcinoma of the stomach (PCCS) is a rare tumor, with fewer than 60 cases published in the English-language literature up to December 2018. In this paper, we present the complex immunoprofile of one PCCS and a hypothesis regarding its histogenesis. CASE SUMMARY A 66-year-old previously healthy male underwent an emergency palliative gastrectomy for a gastric obstructive tumor. The histologic examination and immunoprofile of tumor cells showed a mixed tumor that consisted of choriocarcinoma (90%) and moderate differentiated adenocarcinoma (10%), with hepatic metastases (Stage pT2NxM1L1v1R0) and microsatelite stable status. The patient died one month after surgery. The tumor cells showed focal positivity for CDX2 (adenocarcinoma component), HCG (choriocarcinoma) and CD138 (plasmacytoid carcinoma component) and were negative for HER-2,α- fetoprotein, vEGF, maspin and markers of epithelial-mesenchymal transition. The gastric mucosa cells displayed positivity for CDX2, Hepar A and CD138. The complex immunoprofile and literature data synthesis prove that the gastric mucosa cells can present a multilineage differentiation. CONCLUSION PCCS should be considered as an aggressive variant of microsatellite stable gastric adenocarcinoma of an epithelial type, and not a germ cell tumor.

关键词： Choriocarcinoma Stomach Gastrointestinal Immunohistochemistry Maspin Case report

Focus on alcoholic liver disease:From nosography to treatment

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 Gastroenterology 2014年第25期20卷 8040-8047页

作者： Letitia Adela Maria Streba Cristin constantin vere Costin Teodor Streba Marius Eugen Ciurea Internal Medicine-Medical Semiology University of Medicine and Pharmacy of Craiova 200639 Craiova Romania Research Center of Gastroenterology and Hepatology of Craiova University of Medicine and Pharmacy of Craiova200639 CraiovaRomania University of Medicine and Pharmacy of Craiova 200639 Craiova Romania

Abusive alcohol intake currently ranks as a major cause of liver disease, and is associated with significant mortality worldwide. Alcoholic liver disease(ALD) generically defines liver abnormalities ranging from liver steatosis to the end-stages of disease such as liver cirrhosis. Information regarding the precise incidence and prevalence of ALD is still limited by a lack of large population-based studies and by the absence of large systematic reviews of all epidemiological data available. However, existing collected data show an overall increase in the number of alcohol abusers and alcoholrelated liver disease. The burden exerted on medical systems worldwide is significant, with hospitalization and management costs rising constantly over the years. A great number of all cirrhosis-related deaths in Europe and a significant percentage worldwide areassociated with alcohol consumption. The main possible risk factors for ALD are the amount and duration of alcohol abuse, patterns of drinking and the type of alcoholic beverage consumed. However, ALD does not progress to cirrhosis in all patients, therefore a series of additional factors are implicated. Even though insufficiently studied, genetic factors are generally regarded as highly important, and the presence of comorbidities and dietary habits seem to play a role in disease onset and progression. This lack of clear pathophysiological data further translates in the absence of definite treatment for ALD and shall prove challenging in the coming years. In this article, we aimed to briefly review epidemiologic data on the burden of ALD, risk factors, clinical and nosographic as well as therapeutic aspects of this disease. Without attempting to be exhaustive, this short topic highlight emphasizes each point and may serve as a general guidance tool in the complicated literature related to ALD.

关键词： Alcoholic liver disease Epidemiology Risk factors Diagnosis Treatment

Minimally invasive surgery for gastro-oesophageal junction adenocarcinoma: Current evidence and future perspectives

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 Gastrointestinal Oncology 2023年第10期15卷 1675-1690页

作者： Rodica Birla Petre Hoara Florin Achim valeriu Dinca Diana Ciuc Silviu constantinoiu Adrian constantin Department of General Surgery Carol Davila UniversityBucharest 011172Romania Department of General Surgery Carol Davila University of Medicine and PharmacyBucharest 020021Romania Faculty of Medicine “Titu Maiorescu”UniversityBucharest 031593Romania

Minimally invasive surgery is increasingly indicated in the management of malignant *** oesophagectomy is a difficult operation,with a long learning curve,there is actually a shift towards the laparoscopic/thoracoscopic/robotic approach,due to the advantages of visualization,surgeon comfort(robotic surgery)and the possibility of the whole team to see the operation as well as and the operating *** currently there are still many controversial topics,about the surgical treatment of patients with gastro-oesophageal junction(GOJ)adenocarcinoma,such as the type of open or minimally invasive surgical approach,the type of oesophago-gastric resection,the type of lymph node dissection and others,the minimally invasive approach has proven to be a way to reduce postoperative complications of resection,especially by decreasing pulmonary *** implementation of new technologies allowed the widening of the range of indications for this type of surgical *** short-term and long-term results,as well as the benefits for the patient-reduced surgical trauma,quick and easy recovery-offer this type of surgical treatment the premises for future *** article reviews the updates and perspectives on the minimally invasive approach for GOJ adenocarcinoma.

关键词： Gastro-oesophageal adenocarcinoma Minimally invasive oesophagectomy Laparoscopic gastrectomy Abdomino-mediastinal lymph node dissection Indocyanine green fluorescence imaging

Subtraction hemiarthoplasty in basal joint arthritis: A case report

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 Orthopedics 2019年第8期10卷 304-309页

作者： Henrik constantin B?cker Christina E Freibott Melvin Paul Rosenwasser Department of Orthopedic Surgery New York Presbyterian/Columbia University Medical Center

BACKGROUND Basal joint arthritis is a common disease which is especially present in postmenopausal women. A variety of procedures have been described once conservative treatment has failed. The purpose of our study is to present a novel surgical technique based on a clinical case with three-year follow-up which is highly effective, even after failure of previous procedures. CASE SUMMARY We present a case of a 39 year-old-woman who suffered from recurring, persistent, sharp left thumb pain for several years After two operative procedures, she presented again with intolerable, sharp pain over the trapeziometacarpal joint, and wished to proceed with a pain relieving procedure or arthroplasty. Intraoperatively, the articular surfaces appeared well, without any bare areas of bone or eburnation, resulting in the decision to perform a “subtraction hemiarthroplasty”. A shortening osteotomy of the os trapezium was performed by removing a slice of 8-9 mm bone, without damaging the joint cartilages. The osteotomy was stabilized using two screws, the ligament and capsular tissue was suture imbricated, and a cut down on the translation and a dorsal radial ligament reconstruction were performed. Three years after the final procedure, a long-term follow-up demonstrates excellent results, pain free with full range-of-motion. CONCLUSION Subtraction hemiarthroplasty with ligament tightening imbrication and reconstruction of the radial ligament led to excellent results in motion and pain.

关键词： Basal joint Arthritis Trapeziometacarpal Subtraction hemiarthroplasty Carpometacarpal joint Thumb Case report