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Evaluation of oxidative stress levels in obesity and diabetes by the free oxygen radical test and free oxygen radical defence assays and correlations with anthropometric and laboratory parameters

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World Journal of Diabetes 2020年第5期11卷 193-201页

作者： Mihnea-Alexandru Găman mirela elena epîngeac Camelia Cristina Diaconu Amelia Maria Găman "Carol Davila"University of Medicine and Pharmacy Bucharest 050474Romania Department of Hematology Center of Hematology and Bone Marrow TransplantationFundeni Clinical InstituteBucharest 022328Romania Department of Pathophysiology University of Medicine and Pharmacy of CraiovaCraiova 200349Romania Internal Medicine Clinic Clinical Emergency Hospital of BucharestBucharest 014461Romania Clinic of Hematology Filantropia City HospitalCraiova 200143Romania

BACKGROUND Obesity and diabetes are associated with high levels of oxidative *** Romanian patients with obesity and(or)diabetes,this association has not been sufficiently *** To evaluate oxidative stress in obese and(or)diabetic subjects and to investigate the possible correlations between oxidative stress and anthropometric/biochemical *** Oxidative stress was evaluated from a single drop of capillary *** oxygen species(ROS)were evaluated using the free oxygen radical test(FORT).The free oxygen radical defence(FORD)assay was used to measure antioxidant *** FORT levels were higher in obese subjects(3.04±0.36 mmol/L H2O2)vs controls(2.03±0.14 mmol/L H2O2)(P<0.0001).FORD levels were lower in obese subjects(1.27±0.13 mmol/L Trolox)vs controls(1.87±1.20 mmol/L Trolox)(P=0.0072).Obese diabetic subjects had higher FORT values(3.16±0.39 mmol/L H2O2)vs non-diabetic counterparts(2.99±0.33 mmol/L H2O2)(P=0.0233).In obese subjects,FORT values correlated positively with body mass index(BMI)(r=0.48,P=0.0000),waist circumference(WC)(r=0.31,P=0.0018),fasting plasma glucose(FPG)(r=0.31,P=0.0017),total cholesterol(TC)(r=0.27,P=0.0068)and uric acid(r=0.36,P=0.0001).FORD values correlated negatively with BMI(r=-0.43,P=0.00001),WC(r=-0.28,P=0.0049),FPG(r=-0.25,P=0.0130),TC(r=-0.23,P=0.0198)and uric acid(r=-0.35,P=0.0002).In obese diabetic subjects,FORT values correlated positively with BMI(r=0.49,P=0.0034)and TC(r=0.54,P=0.0217).FORD values were negatively associated with BMI(r=-0.54,P=0.0217)and TC(r=-0.58,P=0.0121).CONCLUSION Oxidative stress levels,as measured by the FORT and FORD assays,were higher in obese subjects vs *** levels were elevated in diabetic obese patients vs obese non-diabetic patients and controls.

关键词： Oxidative stress Obesity Diabetes Reactive oxygen species Antioxidants Dyslipidaemia

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Context-dependent role of sirtuin 2 in inflammation

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Neural Regeneration Research 2025年第3期20卷 682-694页

作者： NoemíSola-Sevilla Maider Garmendia-Berges MCarmen Mera-Delgado elena Puerta Department of Pharmaceutical Sciences Division of PharmacologySchool of Pharmacy and NutritionUniversity of NavarraPamplonaSpain Navarra Institute for Health Research(IdiSNA) PamplonaSpain

Sirtuin 2 is a member of the sirtuin family nicotinamide adenine dinucleotide(NAD~+)-dependent deacetylases, known for its regulatory role in different processes, including inflammation. In this context, sirtuin 2 has been involved in the modulation of key inflammatory signaling pathways and transcription factors by deacetylating specific targets, such as nuclear factor κB and nucleotide-binding oligomerization domain-leucine-rich-repeat and pyrin domain-containing protein 3(NLRP3). However, whether sirtuin 2-mediated pathways induce a pro-or an anti-inflammatory response remains controversial. Sirtuin 2 has been implicated in promoting inflammation in conditions such as asthma and neurodegenerative diseases, suggesting that its inhibition in these conditions could be a potential therapeutic strategy. Conversely, arthritis and type 2 diabetes mellitus studies suggest that sirtuin 2 is essential at the peripheral level and, thus, its inhibition in these pathologies would not be recommended. Overall, the precise role of sirtuin 2 in inflammation appears to be context-dependent, and further investigation is needed to determine the specific molecular mechanisms and downstream targets through which sirtuin 2 influences inflammatory processes in various tissues and pathological conditions. The present review explores the involvement of sirtuin 2 in the inflammation associated with different pathologies to elucidate whether its pharmacological modulation could serve as an effective strategy for treating this prevalent symptom across various diseases.

关键词： interferon inflammation lipopolysaccharide neuroinflammation NLRP3 nuclear factorκB sirtuin 2

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Magnetic glass-ceramics

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Journal of Advanced Ceramics 2012年第2期1卷 138-143页

作者： Viorel SANDU mirela Sidonia NICOLESCU Victor KUNCSER Raluca DAMIAN elena SANDU National Institute of Materials Physics Magurele 077125Romania “Horia Hulubei”National Institute of Nuclear Physics and Engineering Magurele 077125Romania

We present the magnetic properties of magnetic glass ceramics obtained by crystallization of Fe containing borosilicate *** types of nucleators have been used:Cr2O3 and *** role of the nucleators proved to be crucial in the size and morphology of the crystallites developed within glassy matrix as well in the magnetic *** former stimulates the growth of regular single crystals uniformly dispersed within the matrix whereas the latter leads to the formation of grains made of tiny(30 nm),*** magnetic response depends on the amount of Fe ions left dispersed within glassy matrix as paramagnetic *** P2O5 leads to the best structural magnetite,almost 42%of Fe ions are left dispersed in the matrix without magnetic *** the case of Cr2O3,the paramagnetic Fe is decreased to 12%but structural deficiency in the occupancy of the Fe sites of magnetite is revealed by Mössbauer spectroscopy.

关键词： glass ceramics Fe3O4 Mössbauer spectroscopy grain growth

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Ten-year multicentric retrospective analysis regarding postoperative complications and impact of comorbidities in hemorrhoidal surgery with literature review

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World Journal of Clinical Cases 2023年第2期11卷 366-384页

作者： Cosmin Moldovan elena Rusu Daniel Cochior Madalina elena Toba Horia Mocanu Razvan Adam mirela Rimbu Adrian Ghenea Florin Savulescu Daniela Godoroja Florin Botea Department of Medical Surgical Disciplines Faculty of MedicineTitu Maiorescu University of BucharestBucharest 031593Romania Department of General Surgery Witting Clinical HospitalBucharest 010243Romania Department of Preclinic Disciplines Faculty of MedicineTitu Maiorescu University of BucharestBucharest 031593Romania Department of General Surgery Sanador Clinical HospitalBucharest 010991Romania Department of General Surgery Monza Clinical HospitalBucharest 021967Romania Department of Ear Nose and ThroatIlfov County Clinical Emergency HospitalBucharest 022104Romania Department of Orthopedics and Traumatology Elias Emergency University HospitalBucharest 011461Romania Medical Doctoral School Titu Maiorescu University of BucharestBucharest 040317Romania Department of Coloproctology MedLife SA Băneasa HyperclinicBucharest 013693Romania nd Department of Surgery Carol Davila Central Military Emergency University HospitalBucharest 010242Romania Department of Anesthesia Ponderas Academic HospitalBucharest 014142Romania Florin Botea 2nd Department of SurgeryFundeni Clinical InstituteBucharest 022328Romania

BACKGROUND Hemorrhoidal disease(HD)is considered a low-severity pathology by both general population and physicians,but the lengthy conservative therapy and postoperative complications suggest *** To assess the effectiveness of different treatment options,both conservative and surgical,in contrast with some preexisting *** We conducted a retrospective,10-yearlong study between January 2011 and December 2021 in two surgical centers,a private and a state-owned *** compared the efficacy and safety of several treatment options,such as open hemorrhoidectomy,stapled hemorrhoidopexy,rubber band ligation and infrared coagulation in terms of complication rates and types and their correlation with different preexisting comorbidities such as inflammatory bowel disease(IBD),use of anticoagulant medication(AM)and liver *** also conducted a 20-years long PubMed research(1.263 articles)for relevant *** Our study recorded 10940 patients with HD,10241 with conservative and 699 with surgical *** of these,the male-to-female ratio of 1.3,and a peak in age distribution between 59 and 68 years old(32%of patients).For the entire study,we recorded a 90%incidence of immediate pain,immediate bleeding in 1.5%(11 cases),delayed bleeding in 1.0%(7 cases),and 0.6%surgical site *** retention was also present,with 0.2%of patients,anal stricture in 1%and fecal incontinence for 0.5%of patients(4 cases).We recorded no severe complications such as Fournier`s gangrene or rectovaginal *** accounted for 6%of the patients,with ulcerative colitis in 12%and Chron`s disease in 10.5%.6.6%of the patients had AM,determining 4%immediate and 2%delayed bleeding,in surgically treated *** Our study determined that most common complications(pain,urinary retention,bleeding,and stricture)are correlated with each surgical technique and pre-existing comorbidities.

关键词： Retrospective Hemorrhoidal Postoperative Complications Comorbidities

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Cuboidal vs equiaxed:The role of nanopowder assembly during BaTiO_(3)ceramic pressing step

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Journal of Materials Science & Technology 2024年第22期189卷 13-24页

作者： Vlad Alexandru Lukacs Radu Stirbu Oana Andreea Condurache Lavinia Petronela Curecheriu mirela Airimioaei Cristina elena Ciomaga George Stoian Gabriel Caruntu Liliana Mitoseriu Maria Teresa Buscaglia Dielectrics Ferroelectrics&Multiferroics GroupFaculty of Physics“Al.I.Cuza”University of Iasi11 Carol I Bv.700506 IasiRomania Electronic Ceramics Department Jozef Stefan InstituteLjubljana 1000Slovenia Faculty of Chemistry “Al.I.Cuza”University of Iasi11 Carol I Bv.700506 IasiRomania Department of Exact and Natural Sciences Institute of Interdisciplinary Research“Al.I.Cuza”University of Iasi11 Carol I Bv.700506 IasiRomania National Institute of Research and Development for Technical Physics 700050 IasiRomania Departement of Chemistry&Biochemistry Central Michigan UniversityMount PleasantMI 48859United States Institute of Condensed Matter Chemistry and Technologies for Energy CNRVia de Marini 616149 GenoaItaly

The functional properties of BaTiO_(3)ceramics,produced by using the same pressing/sintering strategy from nanopowders with two distinct morphologies(cuboidal/equiaxed nanoparticles)and similar particle sizes,are comparatively *** sintered ceramics exhibit similar nanoscale structures,with faceted crystalline grains and crystalline inclusions,clean grain boundaries and well-defined 90°lamellar domains extending in some entire grains or finer nanodomains inside grain *** differences in the functional behavior originating from the different nanopowder morphology are described in terms of the nanoparticle assembly during the pressing *** numerically simulated green body densification indicated a more efficient assembly resulting in higher density for the cubic particles(0.90 vs.0.84 relative density)and a more homogeneous pore distribution in the spherical-derived *** a result of the higher density after sintering,the functional properties are enhanced in cuboid-originated *** comparison,the ceramic produced from cubic nanoparticles sintered at T_(1)/T_(2)=1250/800℃shows higher permittivity(room temperature value of∼2100-cubic vs.∼1700-rounded),enhanced ferroelectric characteristics(cubic:P_(s)=8.57μC cm^(-2),P_(r)=0.95μC cm^(-2),and E_(c)=2.3 kV cm^(-1),with respect to P_(s)=6.06μC cm^(-2),P_(r)=0.4μC cm^(-2),and E_(c)=1.4 kV cm^(-1),for spherical-derived ones,measured at E_(max)=29.3 kV cm^(-1))and a stronger dc-field dependence of their permittivity of∼12%(cubic)***∼2%(spherical),for a dc-applied field in the range of-15 kV cm^(-1)

关键词： Electroceramics Pressing Morphology Compaction BaTiO_(3)

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Knowledge Management and Customer Relationship Management for Accounting Services Companies

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Chinese Business Review 2013年第6期12卷 435-442页

作者： mirela elena Nichita Marcel Vulpoi Georgiana Toader Bucharest Academy of Economic Studies Bucharest Romania Bucharest Academy of Economic Studies Bucharest Romania SC Vulpoi & Toader Management SRL Bucharest Romania

By combining the abilities to respond directly to customer requests and to provide the customer with a highly interactive, customized experience, companies have a greater ability today to establish nurture and sustain long-term customer relationships than ever before. The ultimate goal is to transform these relationships into greater profitability by increasing repeat purchase rates and reducing customer acquisition costs. Customer relationship management （CRM） has a significant potential to leverage an organization＇s performance, but it does not come without a clear sense of destination and typically without pain. For the research methodology we use the database of customers of a Romanian accounting services company Vulpoi ＆ Toader Management SRL, which is an important player in this market. The goal of our paper is to find out the link between knowledge management （KM） and CRM for this company and how these ＂innovations＂ contribute to increasing the value of the business.

关键词： knowledge management (KM) customer relationship management (CRM) accounting profit value ofbusiness

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Endoscopic knot tying:In vitro assessment in a porcine stomach model

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World Journal of Gastrointestinal Endoscopy 2013年第1期5卷 29-33页

作者： Mihai Ciocirlan mirela elena Ionescu Mircea Mihai Diculescu "Carol Davila" University of Medicine and Pharmacy Fundeni Gastroenterology and Hepatology Clinic022328 BucharestRomania Department of Digestive Diseases Edouard Herriot Hospital69437 LyonFrance

AIM:To determine if surgical knotting performed via endoscopy is an effective closure method for natural orifice translumenal endoscopic surgery. METHODS:The proposed method was tested on an in vitro pig stomach model using standard endoscopy suite materials. A single use laparoscopy trocar (Versaport Plus manufactured by Tyco Healthcare) was fixed onto a plastic rectangular box in a horizontal position. A fresh pig stomach was tightly attached via its esophageal end to the trocar opening on the inner side of the box. The stomach cavity was closed at the duodenal end with Kocher forceps. A standard upper gastrointestinal endoscope fitted at its tip with a transparent plastic cap was introduced into the stomach through the outer trocar opening, so that the passage of the surgical trocar would mimic the passage of an esophagus. The stomach was subsequently inflated, followed by irrigation and washing. A neutral electrode of an electrocautery unit was placed inside the plastic box, un-derneath the pig stomach. The stomach's outer surface was kept moist using normal saline in order to maintain the natural elasticity and to ensure good contact with the electrode. RESULTS:The submucosal space on the anterior face of the stomach was accessed using the technique of endoscopic submucosal dissection. First, a site on the anterior face of the stomach was chosen, near the angle. Then, saline was injected into the submucosa with a standard endoscopic needle, so as to create a 20 mm diameter elevation. A linear 15 mm vertical incision was created at its center using a Dual Knife (KD650U manu-factured by Olympus). This incision was used to access the submucosal space, and about 10 mm was dissected on both sides of the incision. The endoscope was then pushed through to the outside of the stomach after dilating a small puncture made by the Dual Knife in the muscularis propria , which simulated the peritoneoscopy procedure. Then, a 0.025" guidewire (Jagwire/450 cm manufactured by Bos

关键词： Endoscopy Endoscopic submucosal dissection Natural orifice translumenal endoscopic surgery Suture in vitro

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SIRT2 as a potential new therapeutic target for Alzheimer's disease

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Neural Regeneration Research 2024年第1期19卷 124-131页

作者： Noemi Sola-Sevilla elena Puerta Department of Pharmacology and Toxicology Faculty of PharmacyUniversity of NavarraNavarra Institute for Health Research(IdiSNA)PamplonaSpain

Alzheimer's disease is the most common cause of dementia globally with an increasing incidence over the years,bringing a heavy burden to individuals and society due to the lack of an effective *** this context,sirtuin 2,the sirtuin with the highest expression in the brain,has emerged as a potential therapeutic target for neurodegenerative *** review summarizes and discusses the complex roles of sirtuin 2 in different molecular mechanisms involved in Alzheimer's disease such as amyloid and tau pathology,microtubule stability,neuroinflammation,myelin formation,autophagy,and oxidative *** role of sirtuin 2 in all these processes highlights its potential implication in the etiology and development of Alzheimer's ***,its presence in different cell types and its enormous variety of substrates leads to apparently contra dictory conclusions when it comes to understanding its specific *** studies in sirtuin 2 research with selective sirtuin2 modulators targeting specific sirtuin 2 substrates are necessary to clarify its specific functions under different conditions and to validate it as a novel pharmacological *** will contribute to the development of new treatment strategies,not only for Alzheimer's disease but also for other neurodegenerative diseases.

关键词： Alzheimer's disease amyloid autophagy memory neurodegenerative diseases neuroinflammation sirtuin 2 tau

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Mortarless structures based on topological interlocking

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Frontiers of Structural and Civil Engineering 2012年第2期6卷 188-197页

作者： Arcady V.DYSKIN elena PASTERNAK Yuri ESTRIN School of Civil and Resource Engineering The University of Western AustraliaCrawley WA 6009Australia School of Mechanical and Chemical Engineering The University of Western AustraliaCrawley WA 6009Australia Centre for Advanced Hybrid Materials Department of Materials EngineeringMonash UniversityClayton VIC 3800Australia

We review the principle of topological interlocking and analyze the properties of the mortarless structures whose design is based on this *** concentrate on structures built of osteomorphic blocks-the blocks possessing specially engineered contact surfaces allowing assembling various 2D and 3D *** structures are easy to build and can be made *** are flexible,resistant to macroscopic fractures and tolerant to missing *** blocks are kept in place without keys or connectors that are the weakest elements of the conventional interlocking *** overall structural integrity of these structures depends on the force imposed by peripheral *** peripheral constraint can be provided in various ways:by an external flame or features of site topography,intemal prestressed cables/tendons,or self-weight and is a necessary auxiliary element of the *** constraining force also determines the degree of delamination developing between the blocks due to bending and thus controls the overall flexibility of the structure thus becoming a new design parameter.

关键词： topological interlocking fragmented structures segmented structures constraint delamination bending stiffness

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Spiral attractor created by vector solitons

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Light(Science & Applications) 2014年第1期3卷 355-362页

作者： Sergey V Sergeyev Chengbo Mou elena G Turitsyna Alexey Rozhin Sergei K Turitsyn Keith Blow Aston Institute of Photonic Technologies Aston UniversityBirmingham B47ETUK

Mode-locked lasers emitting a train of femtosecond pulses called dissipative solitons are an enabling technology for metrology,high-resolution spectroscopy,fibre optic communications,nano-optics and many other fields of science and ***,the vector nature of dissipative solitons has been exploited to demonstrate mode locked lasing with both locked and rapidly evolving states of ***,for an erbium-doped fibre laser mode locked with carbon nanotubes,we demonstrate the first experimental and theoretical evidence of a new class of slowly evolving vector solitons characterized by a double-scroll chaotic polarisation attractor substantially different from Lorenz,Ro¨ssler and Ikeda strange *** underlying physics comprises a long time scale coherent coupling of two polarisation *** observed phenomena,apart from the fundamental interest,provide a base for advances in secure communications,trapping and manipulation of atoms and nanoparticles,control of magnetisation in data storage devices and many other areas.

关键词： chaos mode-locked laser polarisation phenomena vector soliton

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