检索结果-南通市图书馆

Combined duplication of the colon and vermiform appendix in an adult patient

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 2008年第4期14卷 641-643页

作者： Sahin Kabay Mehmet Yucel Faik Yaylak alper hacioglu Mustafa C Algin Esra G Olgun Levent Sahin Tayfun Aydin Department of Urology Dumlupinar University HospitalKutahya 43100Turkey Department of General Surgery Dumlupinar University HospitalKutahya 43100Turkey Department of Pathology Dumlupinar University HospitalKutahya 43100Turkey Department of Anesthesiology Dumlupinar University HospitalKutahya 43100Turkey

Combined duplication of the colon and vermiform appendix is one of the rare congenital anomalities of the alimentary tract. Only a few cases have been reported in the adult population. A 28-year-old man presented to the clinic with a mass in the right flank. Imaging showed only a hydronephrotic atrophic kidney. The f inal diagnosis was only available at exploration. Combined duplication of the tubular colon and vermiform appendix was conf irmed histopathologically. The patient was treated with nephrectomy and complete resection of the duplicated colon and vermiform appendix. The patient recovered uneventfully,and has done well for the past year. This is believed to be one of the first reports of combined duplication of the tubular colon and vermiform appendix as a cause of hydronephrotic atrophic kidney in an adult patient.

关键词：肾盂积水肾脏结肠成年患者

Neutronic study on the effect of first wall material thickness on tritium production and material damage in a fusion reactor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2022年第4期33卷 33-50页

作者： HacıMehmet S¸ahin Güven Tunc¸ alper Karakoc¸ Melood Mohamad Omar Department of Energy Systems Engineering Technology FacultyKarabuk UniversityKarabukTurkey Department of Energy Systems Engineering Technology FacultyGazi UniversityAnkaraTurkey Department of Energy Systems Engineering Institute of Graduate ProgramsKarabuk UniversityKarabukTurkey

In this study,the effects of changing first wall materials and their thicknesses on a reactor were investigated to determine the displacement per atom(DPA)and gas production(helium and hydrogen)in the first wall,as well as the tritium breeding ratio(TBR)in the coolant and tritium breeding ***,the modeling of the magnetic fusion reactor was determined based on the blanket parameters of the International Thermonuclear Experimental Reactor(ITER).Stainless steel(SS 316 LNIG),Oxide Dispersion Strengthened Steel alloy(PM2000 ODS),and China low-activation martensitic steel(CLAM)were used as the first wall(FW)*** family molten salt materials(FLiBe,FLiNaBe,FLiPb)and lithium oxide(LiO_(2))were considered the coolant and tritium production material in the blanket,*** transport calculations were performed using the wellknown 3D code MCNP5 using the continuous-energy Monte Carlo *** built-in continuous energy nuclear and atomic data libraries along with the Evaluated Nuclear Data file(ENDF)system(ENDF/B-V and ENDF/B-VI)were ***,the activity cross-section data library CLAW-IV was used to evaluate both the DPA values and gas production of the first wall(FW)*** interface computer program written in the FORTRAN 90 language to evaluate the MCNP5 outputs was developed for the fusion reactor *** results indicated that the best TBR value was obtained for the use of the FLiPb coolant,whereas depending on the thickness,the first wall replacement period in terms of radiation damage to all materials was between 6 and 11 years.

关键词： ITER First wall material Material damage Tritium breeding ratio Fluorides family molten salt materials

Stable Computer Method for Solving Initial Value Problems with Engineering Applications

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第6期45卷 2617-2633页

作者： Mudassir Shams Nasreen Kausar Ebru Ozbilge alper Bulut Department of Mathematics and Statistics Riphah International UniversityI-14Islamabad44000Pakistan Department of Mathematics Yildiz Technical UniversityFaculty of Arts and ScienceEsenler34210IstanbulTurkey Department of Mathematics&Statistics American University of the Middle EastEgaila54200Kuwait

Engineering and applied mathematics disciplines that involve differential equations in general,and initial value problems in particular,include classical mechanics,thermodynamics,electromagnetism,and the general theory of relativity.A reliable,stable,efficient,and consistent numerical scheme is frequently required for modelling and simulation of a wide range of real-world problems using differential *** this study,the tangent slope is assumed to be the contra-harmonic mean,in which the arithmetic mean is used as a correction instead of Euler’s method to improve the efficiency of the improved Euler’s technique for solving ordinary differential equations with initial *** stability,consistency,and efficiency of the system were evaluated,and the conclusions were supported by the presentation of numerical test applications in *** to the stability analysis,the proposed method has a wider stability region than other well-known methods that are currently used in the literature for solving initial-value *** validate the rate convergence of the numerical technique,a few initial value problems of both scalar and vector valued types were *** proposed method,modified Euler explicit method,and other methods known in the literature have all been used to calculate the absolute maximum error,absolute error at the last grid point of the integration interval under consideration,and computational time in seconds to test the *** Lorentz system was used as an example to illustrate the validity of the solution provided by the newly developed *** method is determined to be more reliable than the commonly existing methods with the same order of convergence,as mentioned in the literature for numerical calculations and visualization of the results produced by all the methods discussed,Mat Lab-R2011b has been used.

关键词： Local truncation error consistency computational time stability lorentz system

Analysis of PEM and AEM electrolysis by neural network pattern recognition, association rule mining and LIME

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy and AI 2023年第3期13卷 169-181页

作者： M.Erdem Gunay N.alper Tapan Department of Energy Systems Engineering Istanbul Bilgi UniversityEyupsultanIstanbul 34060Turkey Department of Chemical Engineering Gazi UniversityMaltepeAnkara 06570Turkey

In this work,as an extension of previous machine learning studies,three novel techniques,namely local inter-pretable model-agnostic explanations(LIME),neural network pattern recognition and association rule mining(ARM)were utilized for proton exchange membrane(PEM)and anion exchange membrane(AEM)electrolyzer database for hydrogen *** main goal of LIME was to determine the positive or negative effects of a variety of descriptor variables on current density,power density and *** this technique,it was possible to uncover rules or paths that lead to high current density,low power density and low *** provided the dominant rules leading to high current density such as using ELAT as the cathode gas diffusion layer,using pure Pt on the cathode surface and using pure carbon as the cathode *** addition,LIME and neural network pattern recognition successfully uncovered the importance of catalytic materials such as cath-ode/anode support/surface elements,operational variables like K_(2)CO_(3) or KOH concentration in the electrolyte,certain membrane types,gas diffusion layers,and applied potential on current *** was then concluded that machine learning can help determine the ideal conditions for developing a PEM and AEM electrolyzer to maximize hydrogen generation,which can also guide future research.

关键词： Machine learning Data mining Hydrogen production Current density

Pathway and protein engineering for biosynthesis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2022年第4期7卷 1044-1045页

作者： Yongjin Zhou Martin Grininger Hal alper Dalian Institute of Chemical Physics Chinese Academy of SciencesChina Goethe University Frankfurt Germany The University of Texas at Austin USA

Sustainable biosynthesis of chemicals and efforts to create new molecules of interest require efficient enzymes and pathways as well as comprehensive tools and technologies to implement this *** are the key components for construction of efficient biosynthetic pathways,enzyme characterization and engineering can help to identify key enzymes and regulatory factors for construction of biosynthetic pathways,as well as improve enzyme performance;Pathway engineering can help construct biosynthetic pathways and balance metabolic network to improve biosynthetic efficiency;Tools and technologies facilitate the engineering of enzymes,pathways,and whole *** special issue focusing on“Pathway and Protein Engineering for Biosynthesis”comprises eight review articles and nine original research articles,which highlight and showcase current progress on Pathway and Protein Engineering and their application for biosynthesis.

关键词： ring engineering biosynthesis

Comparison of body mass index, anti-müllerian hormone and insulin resistance parameters among different phenotypes of polycystic ovary syndrome

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gynecology and Obstetrics Clinical Medicine 2022年第4期2卷 164-170页

作者： Türkan Gürsu alper Eraslan Berk Angun University of Health Sciences Turkey Zeynep Kamil Maternity and Children's Training and Research HospitalDepartment of Obstetrics and GynecologyIstanbulTurkey Dunya IVF Center KyreniaCyprus Department of Reproductive Endocrinology and InfertilityTurkey

Background:Diagnosis of polycystic ovary syndrome(PCOS)depends on 2003 Rotterdam *** to these criteria there are four possible combinations resulting in various *** aimed(i)to confirm that the levels of body mass index(BMI),anti-müllerian hormone(AMH)levels and insulin resistance(IR)are higher in PCOS patients and higher in phenotype-A among PCOS patients,and(ii)to determine cut-off values for the diagnosis of PCOS and *** and methods:This study was conducted in an IVF Center,between November 2019 and January *** of infertile women participating in the study was evaluated *** such as menstruation pattern,clinical hyperandrogenism,age,BMI,follicle stimulating hormone(FSH),luteinizing hormone(LH),estradiol,thyroid stimulating hormone(TSH),prolactin,AMH,dehydroepiandrosterone sulphate(DHEA-S),fasting blood glucose,fasting insulin levels,antral follicle counts(AFC)and ovarian volumes were recorded for each *** were grouped as PCOS and non-PCOS,and PCOS group was further divided into 4 subgroups according to their *** of infertile patients with PCOS patients were compared with infertile non-PCOS patients and PCOS phenotypes were compared among each ***:Data of 244 infertile patients was included in the ***,AMH,AFC,and HOMA-IR were statistically higher in PCOS patients,compared to non-PCOS *** found the AMH level of>3.105 ng/ml to be having 90.8%sensitivity and 90%specificity to diagnose a patient as *** different phenotypes,also BMI,AMH,and insulin resistance index(HOMA-IR)levels were significantly higher in infertile PCOS phenotype-A when compared to other three phenotypes(p:0.003,p:0.000,and p:0.000,respectively).The AMH cut-off value to estimate phenotype-A was found as 6.095 ng/ml with 69.2%sensitivity and 86.7%*** did not found threshold levels of BMI and HOMA-IR with high sensitivity to identify ***:Properly di

关键词： Polycystic ovarian syndrome Body mass index Anti-müllerian hormone Insulin resistance PCOS Phenotypes

Boldine provides protective effect against nephrotoxicity induced by cisplatin in Wistar rats:Role of oxidative stress,inflammation and caspase-3

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 2022年第9期46卷 2111-2122页

作者： NERGIZ HACER TURGUT HUSEYIN GUNGOR MEHMET EKICI MUMIN alper ERDOGAN MEHMET ONDER KARAYIGIT HAKI KARA Department of Pharmacology Faculty of PharmacyIzmir Katip Celebi UniversityIzmir35620Turkey Department of Pharmacology and Toxicology Faculty of Veterinary MedicineCumhuriyet UniversitySivas58140Turkey Department of Physiology Faculty of Veterinary MedicineCumhuriyet UniversitySivas58140Turkey Department of Physiology Faculty of MedicineIzmir Katip Celebi UniversityIzmir35620Turkey Department of Pathology Faculty of Veterinary MedicineCumhuriyet UniversitySivas58140Turkey

Side effects of cisplatin,especially dose-dependent nephrotoxicity,are major factors limiting its use in ***((S)-2,9-dihydroxy-1,10-dimethoxy-aporphine)is a natural alkaloid known for its strong antioxidant activity present in leaves/bark of boldo tree(Peumus boldus Molina),a native tree in ***,we aimed to investigate the nephroprotective effect of boldine and its underlying mechanisms on cisplatin-induced rat renal *** Wistar albino rats divided into 5 groups(Control,Cis,Bold.40,Cis+Bold.20,Cis+Bold.40 groups)were *** received boldine(20 or 40 mg/kg/day),or vehicle(saline)intraperitoneal for 14 days and a single dose cisplatin(7 mg/kg,ip)was applied on the 10th day to induce *** and kidney tissue were weighed to determine kidney *** urea nitrojen(BUN)and creatinine levels,the amount of thiobarbituric acid reactive substances(TBARS,an index of lipid peroxidation),superoxide dismutase(SOD),glutathione peroxidase(GPx)enzyme activities and tumor necrosis factor alpha(TNF-α)levels were measured and histopathologic examination was *** nitric oxide synthase(iNOS)and caspase-3 expressions were detected *** induced by cisplatin was apparent by elevated levels of BUN,creatinine,kidney index,TBARS and TNF-α,and decreased body weight,SOD and GPx enzyme *** with boldine protected the renal function at both boldine doses by fixing the renal damage markers,oxidative stress,caspase-3 and iNOS *** findings supported biochemical *** together these findings indicate that boldine has promising protective effect against cisplatin nephrotoxicity by improving oxidative stress,inflammation,histopathological alterations and by alleviating caspase 3 expression.

关键词： Boldine Caspase-3 Cisplatin nephrotoxicity Inflammation Oxidative stress

Exact Solutions to (3+1) Conformable Time Fractional Jimbo–Miwa,Zakharov–Kuznetsov and Modified Zakharov–Kuznetsov Equations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2017年第5期67卷 479-482页

作者： alper Korkmaz Department of Mathematics Cankiri Karatekin UniversityCankiriTurkey

Exact solutions to conformable time fractional (3+1)-dimensional equations are derived by using the modified form of the Kudryashov method. The compatible wave transformation reduces the equations to an ODE with integer orders. The predicted solution of the finite series of a rational exponential function is substituted into this *** resultant polynomial equation is solved by using algebraic operations. The method works for the Jimbo–Miwa, the Zakharov–Kuznetsov, and the modified Zakharov–Kuznetsov equations in conformable time fractional forms. All the solutions are expressed in explicit forms.

关键词： fractional (3+1)-dimensional Jimbo–Miwa equation fractional modified Zakharov–Kuznetsov equation modified Kudryashov method fractional Zakharov–Kuznetsov equation exact solutions

内皮素和一氧化氮对脓毒性休克实验模型中器官损伤,肠系膜缺血和存活的影响(英文)

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2003年第10期24卷 3-7+110页

作者： alper B ISKIT,Oguz GUC Department of Pharmacology Faculty of Medicine Hacettepe University Ankara 06100 Turkey Department of Pharmacology Faculty of Medicine Hacettepe University Ankara 06100 Turkey

The development of potent drugs to treat cardiopulmonary failure in sepsis, such as antibiotics and new immunomodulatory therapeutic approaches have not prevented sepsis from being a major health problem. Dysfunction of the vascular endothelium is an early event in septic shock. The recognition of endothelium-derived substances, such as nitric oxide and endothelin, important mediators of systemic inflammatory response syndrome, led to the proposal that pharmacological inhibition of nitric oxide and endothelin production could represent a useful strategy in the treatment of septic *** ischemia and translocation of endotoxin from the gut to the circulation contributes significantly to the high mortality rate in sepsis-related syndromes. This vasoconstriction in the splanchnic circulation can be partially blocked by inducible nitric oxide synthase inhibitor aminoguanidine or endothelin receptor antagonist bosentan in experimental models of septic *** can be suggested that endothelin and n

关键词：脓毒性休克脓毒症内毒素类内皮素类一氧化氮波生坦氨基胍内脏循环存活