1,604 research outputs found

    Stochastic simulations for the time evolution of systems which obey generalized statistics: Fractional exclusion statistics and Gentile's statistics

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    We present a stochastic method for the simulation of the time evolution in systems which obey generalized statistics, namely fractional exclusion statistics and Gentile's statistics. The transition rates are derived in the framework of canonical ensembles. This approach introduces a tool for describing interacting fermionic and bosonic systems in non-equilibrium as ideal FES systems, in a computationally efficient manner. The two types of statistics are analyzed comparatively, indicating their intrinsic thermodynamic differences and revealing key aspects related to the species size.Comment: 14 pages, 5 figures, IOP forma

    THE LOAD-CARRYING CAPACITY FOR SOME TUBULAR REACTORS AND STRESS CONCENTRATION

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    The purpose of this paper was to evaluate the state of stress and the stress concentration in the main critical junctions of a tubular reactor. Additional two numerical analyses were developed to identify the critical junctions of reactor due to the main loads: temperature gradient and internal pressure. One analysis is based on the extension of classical thin shell theory and the flexibility matrix method and the second on the finite element method (FEM), by the package COSMOS/M Designer II. Comparative experimental study based on recording the strains at selected surface positions, for different values of the reaction loads, was done using strain gauges. The analyses reveal a reasonable accuracy of the results and accurate positioning of the critical junctions. The loads are variable, so that the study may give a primary estimation on the fatigue design and analysis

    RISK ASSESSMENT FOR VESSELS AFFECTED BY CORROSION

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    THEORETICAL AND EXPERIMENTAL STUDIES ON DISKS CENTRIFUGAL SEPARATORS

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    The paper presents an extension of classical thin shell theory to those with moderate thickness, having simplex order h/R ≤ 0.2 ... 0.33. The application of the flexibility matrix method is studied to realise a computerised analysis of centrifugal disks separators for the influence of the central load Fa induced for assembling the bowl and for the critical area junctions. In the first time, the separator's bowl is divided in structural elements; each of the structural elements is at first considered separately and then the global generalised forces and bending moments are obtained from the displacement compatibility conditions at each element junction. Comparative experimental investigations based on recording surface strains at selected locations of the bowl performed with strain gauges reveal a reasonable agreement. The main features of the method as, (1) reasonable accuracy of the results, (2) reasonable positioning of the critical junctions, (3) low computational cost, give a real possibility in the design work

    Malignant tumor with different localisation after klatskin tumor succesfully resected

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    Institutul Clinic Fundeni, Clinica Chirurgie Generală și Transplant Hepatic “Dan Setlacec”, Al XI-lea Congres al Asociației Chirurgilor „Nicolae Anestiadi” din Republica Moldova și cea de-a XXXIII-a Reuniune a Chirurgilor din Moldova „Iacomi-Răzeșu” 27-30 septembrie 2011Prezentare de caz: tumora Klatskin IIIb rezecată cu evoluția postoperatorie bună, diagnosticat la 3 ani cu tumoră gastrică.Case report: IIIb Klatskin tumor successfully resected with good postoperative outcome is diagnosed 3 years later with a gastric tumor

    Central bisectionectomy – a feasible alternative for centrally located liver tumors

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    Clinica de Chirurgie Generală şi Transplant Hepatic, I.C.Fundeni, Bucureşti, România, Al XII-lea Congres al Asociației Chirurgilor „Nicolae Anestiadi” din Republica Moldova cu participare internațională 23-25 septembrie 2015Introducere: Bisectionectomia centrală reprezintă rezecția hepatică a segmentelor 4a, 4b, 5 și 8, definite astfel de sistemul Brisbane. Denumită anterior în diferite feluri (mesohepatectomie, hepatectomie centrală, lobectomie centrală) bisectionectomia centrală este operația de elecție pentru tumorile hepatice situate în segmentele centrale, și este de preferat rezecțiilor hepatice extinse (trisectionectomia dreaptă/stângă) pentru că minimalizează riscul insuficienței hepatice postoperatorii. Prezentare de caz: Pacienta în vârstă de 54 de ani cu dureri în hipocondrul drept, scădere ponderală cca. 8 kg / 2 luni. Bioumoral: AFP, CA 19.9 și ACE – în limite normale / AgHbs, Ac Anti-HBc, Ac Anti-HCV – negative. EDS/EDI – de aspect normal, prezintă la examenul CT o formațiune tumorală hepatică situată central (segmentele 4a, 4b, 5 și 8) ce înglobează VHM, la distanță de bifurcația venei porte. Se practică o bisectionectomie centrală, cu ligaturarea pediculilor vasculari glissonieni drept anterior (seg. 5 și 8) și stâng medial (seg. 4a și 4b). Transecțiunea parenchimului hepatic se efectuează folosindu-se “SONOPET”. Cu evoluție postoperatorie bună, pacienta se externează la 9 zile postoperator. La 6 luni postoperator probele serice AFP – în limite normale, fără semne imagistice de recidivă. Bisectionectomia centrală poate fi realizată atunci când tumora nu invadează pediculii vasculari aferenți parenchimului restant (secțiunea dreaptă posterioara / secțiunea stângă laterală) și presupune doua planuri de secțiune. Concluzii: Bisectionectomia centrală este operația de elecție pentru tumorile hepatice centrale prin care se prezervă cantitatea maxima de parenchim hepatic, minimalizându-se riscul de IHA postoperatorie. Este posibilă în cazuri atent selecționate și necesită experiență în rezecțiile hepatice majore.Introduction: By Brisbane terminology central bisectionectomy is the resection of segments 4a, 4b, 5, and 8 of the liver. Formerly called in different ways (mesohepatectomy, central hepatectomy, central lobectomy) central bisectionectomy is the elective surgery for liver tumors located in central segments (4a, 4b, 5 and 8), with better results than extensive liver resections (right / left trisectionectmy) because it minimizes the risk of postoperative liver failure. Case report: A 54 years old female, presented for right upper quadrant pain, weight loss (8 kg / 2 months); Blood tests: normal AFP; negative Ag Hbs, Ab Anti-HBc, Ab Anti-HCV. UGE/LGE – with a normal aspect; CT scan revealed centrally located liver tumor (segments 4a, 4b, 5, and 8) that includes MHV, away from the portal vein bifurcation. We performed a regulated central bisectionectomy with ligation of vascular pedicles for right anterior section (seg. 5 and 8) and those for left medial section (seg 4a and 4b). With good postoperative course, the patient was discharged in the 9th postoperative day. Six months postoperatively, the patient is good, without tumor relapse signs. Central bisectionectomy can not be performed when the tumor invades the vascular pedicles afferent to remaining parenchyma and requires two planes of transection. Conclusions: Central bisectionectomy is the best choice surgery for centrally located liver tumors which preserves the maximum amount of liver parenchyma thus minimizing the risk of postoperative liver failure

    Bio-R - возможность эффективного лечения язвенной болезни двенадцатиперстной кишки

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    Catedra Medicină internă nr. 3, USMF „Nicolae Testemiţanu”, Catedra Farmacologie şi farmacie clinică, USMF „Nicolae Testemiţanu”, Spitalul Clinic al Ministerului Sănătăţii, Chişinău, Conferinţa Ştiinţifico-Practică „Medicina modernă, actualităţi şi perspective”, consacrată aniversării de 40 de ani ai Spitalului Clinic al Ministerului Sănătăţii, 27-28 mai, 2010, Chişinău, Republica MoldovaIn order to achieve the objective, 65 patients (mean age – 46.8 ± 2.5 years) with chronic duodenal ulcer in acutisation were examined. Patients were examined by traditional and special clinical methods. Obtained data show that in the examined patients a veridical increase in the concentration of POL products was determined, as well as early increase of MDA, DC and CT, and a reduction of the activity of catalase and superoxide dismutase enzymes indicating the exhaustion of the antioxidant system. It was established that there is a more pronounced imbalance of the antioxidant system in patients with duodenal ulcer larger than 1 cm, which is an important argument for the usage of Bio-R due to its positive action on the components of the antioxidant system.В исследование были включены 65 больных (средний возраст 46,8 ± 2,5 лет) с хронической язвой двенадцатиперстной кишки в стадии обострения. У обследованных больных до лечения определялось достоверное повышение концентрации показателей ПОЛ с ранним повышением МДА, СД и КТ, снижение активности ферментов каталазы и супероксиддисмутазы, что указывало на снижение ферментов системы ПОЛ. Было установлено, что существует более выраженный дисбаланс антиоксидантной системы у больных с язвой двенадцатиперстной кишки более 1 см, что обосновывает использование Bio-R из-за его положительного действия на показатели антиоксидантной системы

    15 years of Romanian national program of liver transplant – a retrospective analysis of 648 patients operated

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    Centrul de Chirurgie Generală şi Transplant Hepatic “Dan Setlacec”, Institutul Clinic Fundeni, Bucureşti, România, Al XII-lea Congres al Asociației Chirurgilor „Nicolae Anestiadi” din Republica Moldova cu participare internațională 23-25 septembrie 2015Introducere: Transplantul hepatic (TH) a devenit metoda de elecție în tratamentul bolilor hepatice în stadiu terminal, cu peste 20.000 de proceduri anuale la nivel mondial. Scopul acestui studiu este de a analiza rezultatele programului de transplant hepatic românesc după 15 ani de activitate. Material și metode: Între aprilie 2000 și aprilie 2015, 648 de pacienți au fost transplantați cu ficat în România. Raportul pe sexe a fost 382 (m) / 266 (f), în timp ce raportul adulți/copii a fost de 588/60, cu o vârstă medie de 45 de ani. Indicațiile principale pentru TH au fost: ciroza de etiologie VHB (176 pct; 27,1%), HCC (128 pct; 19,7%), și ciroza de etiologie VHC (118 pct; 18,2%). Transplantul hepatic de la donator cadaveric a fost efectuat la 532 pacienți (82,1%): 512 pct cu ficat întreg, 16 pct – cu ficat split, 2 pct – cu ficat redus, transplant-domino – la 2 pct. Transplantul de ficat de la donator viu a fost efectuat la 116 pct (17,9%). Rezultate: Mortalitatea perioperatorie a fost de 7,9% (51 pct). Rata de retransplant a fost de 4,6% (30 pct). Supraviețuirea la 1, 3 și 5 ani pe termen lung a fost estimată la 88,8%, 82,5% și respectiv 79,2%. Timpul de așteptare pentru TH a scăzut semnificativ în timp. Mortalitatea pe un an pe lista de așteptare a scăzut semnificativ, de la 31,4% la 11,8%. Concluzii: Programul de transplant hepatic în România se adresează atât cauzelor de insuficiență hepatică acută și cronică, cât și tumorilor hepatice la adulți și copii, fiind folosite toate tehnicile chirurgicale. Amploarea programului a crescut constant în timp, ceea ce a adus la scurtarea timpului și a ratelor de mortalitate pe lista de așteptare.Background: Liver transplantation (LT) is the treatment of choice for end-stage liver diseases, with more than 20.000 procedures yearly worldwide. The aim of this study was to analyze the results of Romanian National Program of LT after 15 years of activity. Methods: Between April 2000 and April 2015, 648 patients received 678 LTs in Romania. Male/female ratio was 382/266, while adult/pediatric ratio was 588/60, with a mean age range 7 months – 68 yr. Main LT indications in the adult population were HBVrelated cirrhosis (176 pts; 27.1%), hepatocellular carcinoma (128 pts; 19.7%), and HCV-related cirrhosis (118 pts; 18.2%). DDLT (death donor liver transplant) was performed in 532 pts (82.1%): whole LT in 512 pts, split LT in 16 pts, reduced LT in 2 pts, and domino LT in 2 pts. LDLT (living donor liver transplant) was performed in 116 pts (17.9%). Results: Perioperative mortality was 7.9% (51 pts). Retransplantation rate was 4.6% (30 pts). Long-term overall 1-, 3-, and 5- year estimated survival rates were 88.8%, 82.5%, and 79.2%, respectively. Median waiting time for LT decreased significantly over time. One-year overall mortality on waiting list also decreased significantly over time from 31.4% to 11.8%. Conclusions: The liver transplantation program in Romania addresses all causes of acute and chronic liver failure or liver tumors in adults and children, using all surgical techniques. The program constantly increased over time, leading to less time and lower mortality rate on the waiting list with the results similar to those of other centers

    Living donor liver transplant in Romania – 116 cases experience

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    Centrul de Chirurgie Generală și Transplant Hepatic “Dan Setlacec”, Institutul Clinic Fundeni, Bucureşti, România, Al XII-lea Congres al Asociației Chirurgilor „Nicolae Anestiadi” din Republica Moldova cu participare internațională 23-25 septembrie 2015Introducere: Cererea pentru transplantul hepatic în Romania este în continuă creștere în timp ce penuria de donatori de organe persistă. Timpul lung de așteptare pentru un transplant de ficat şi disfuncţia hepatică progresivă aferentă așteptării a motivat multe familii să ia în considerare donarea de organe. Material și metode: În anul 2000 a fost realizat primul transplant hepatic ortotopic cu ficat întreg de către echipa I.Popescu et al. la Institutul Clinic Fundeni din Bucureşti, urmat de transplantul de ficat de la donator viu (LDLT) mai târziu în acelaşi an, ajungând în aprilie 2015 la un total de 116 de transplanturi cu ficat de la donator viu. LDLT a fost realizată cu hemificat drept la 78 pacienți, secțiune laterală stânga – la 26 pacienți, hemificat stâng – la 7 pacienți, hemificat stâng în bloc cu segmentul 1 – la 3 pacienți, şi dual graft – la 2 pacienți. Rezultate: Rata de morbidități majore a fost de 53,4% (62 pacienți), rata generală de retransplant a fost de 11,3% (13 pacienți). Rata de supraviețuire generală la 1-, 3-, şi 5 ani a fost de 88,8%, 82,5%, respectiv, 79,2%. Concluzii: Scopul nostru a fost de a reduce rata mortalității pe lista de așteptare prin scurtarea timpului de aşteptare pentru TH prin asigurarea grefelor necesare. Avantajele LDLT includ posibilitatea de a fi efectuate în regim programat şi cu un timp de aşteptare scurt pentru primitor, în timp ce indicaţiile de transplant pot fi extinse (ex: HCC în afara criteriilor Milano).Introduction: The request for Liver Transplant (LT) in Romania continues to increase while the donor pool size remains inadequate. The long waiting time for a liver transplant and the progressive liver dysfunction that occurs in this time has motivated many families to consider living donation. Material and methods: In 2000, the first successful LT (with whole graft) was carried out by I.Popescu et al. at Fundeni Clinical Institute in Bucharest, followed by the first living donor liver transplantation (LDLT) (successful) later the same year, reaching 116 living donors liver transplants by April 2015. LDLT was performed with right hemiliver in 78 pts, left lateral section in 26 pts, left hemiliver in 7 pts, left hemiliver with segment 1 in 3 pts, and dual graft LDLT in 2 pts: one received a right hemiliver and a left lateral section (17), and one received a left hemiliver and a left lateral section. Results: Major morbidity rates were 53.4% (62 pts) Overall retransplantation rate was 11.3% (13 pts). Long-term overall 1-, 3-, and 5- year estimated survival rates were 88.8%, 82.5%, and 79.2%, respective. Conclusions: Our main goal was to continuously reduce the drop-out rate on waiting list (due to mortality and morbidity) by shortening the waiting time for LT insured by providing the necessary grafts. Advantages of LDLT include the ability to be performed on an elective basis, with optimal timing and no waiting time for the recipient, while the indications for transplantation may be extended (i.e. HCC beyond Milan criteria)

    Studies regarding the quality of certain fruit distillates in correlation with the analytical data and sensorial assessment

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    Out of the 20 samples under analysis only 14 meet the requirements for the award of a distinct denomination whereas the other six may be called just spirits. The fact that some drinks of the second category do not mention on the label the denomination of spirit is a crime. Total acidity and the volatile acidity have concordant values giving the opportunity to identify the products maturated as well as the neutralization or bonification treatments. The pH values allow the classification of the distillates/distilled drinks by their degree of naturalness and the possible treatments effectuated.The polyphenol content may indicate the existence or inexistence of the wooden (oak) storage areas and the possible time of contact with these spaces or the reduction of influence due to the diverse treatments. The ester content indicates for 11 samples the cause that leads to their classification into a superior quality class. The values of the extract content may also explain, even more than the ester content, the favorable impression and the superior gustative quality for the 10 samples in their respective order. Except for two samples that showed quality defects, the rest of the distillates and distilled drinks registered positive or very positive sensorial qualities (especially Vinia maturated cherry distillate raw material and Vinia maturated plum distillate raw material
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