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Metastatic melanoma to the common bile duct causing obstructive jaundice:A case report

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World Journal of Gastroenterology 2007年第5期13卷 813-815页

作者： Radoje B Colovic Nikica M Grubor Miodrag D Jovanovic marjan t micev Natasa R Colovic Institute for Digestive Diseases First Surgical Clinic Clinical Center of Serbia Koste Todorovica 6 Belgrade 11000 Serbia

Metastatic melanoma to the common bile duct is very rare with only 18 cases reported so far. We report a 46 year old women who, 18 mo after excision of a skin melanoma, developped a painless progressive obstructive jaundice. At operation a melanoma within the distal third of the common bile duct was found. there were no other secondaries within the abdomen. the common bile duct, including the tumor, was resected and anastomosed with Roux-en-Y jejunal limb. the patient survived 31 mo without any sign of local recurrence and was submitted to three other operations for axillar and brain secondaries, from which she finally died. Radical resection of metastatic melanoma to the common bile duct may result in lifelong relief of obstructive jaundice. It is safe and relatively easy to perform. In other cases, a less aggressive approach, stenting or bypass procedures, should be adopted.

关键词： Metastatic melanoma Common bile duct Jaundice

Cystic lymphangioma of the pancreas

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World Journal of Gastroenterology 2008年第44期14卷 6873-6875页

作者： Radoje B Colovic Nikica M Grubor marjan t micev Henry Dushan E Atkinson Vitomir I Rankovic Mihajlo M Jagodic Institute for Digestive Diseases Clinical Center of SerbiaFirst Surgical ClinicKoste Todorovica 6Belgrade11000Serbia Imperial College School of Medicine St Mary's HospitalPraed StreetLondon W21NYUnited Kingdom

Lymphangioma of the pancreas is an extremely rare benign tumour of lymphatic origin, with fewer than 60 published cases. Histologically, it is polycystic, with the cysts separated by thin septa and lined with endothelial cells. though congenital, it can affect all age groups, and occurs more frequently in females. Patients usually present with epigastric pain and an associated palpable mass. Complete excision is curative, even though, depending on the tumour location, surgery may be simple or involve extensive pancreatic resection and anastomoses. the authors present a 49-year-old woman in whom a polycystic septated mass, 35 mm× 35 mm in size, was discovered by ultrasonography （US） in the body of the pancreas during investigations for epigastric pain and nausea. At surgery, a well circumscribed polycystic tumor was completely excised, with preservation of the pancreatic duct. the postoperative recovery was uneventful. Histology confirmed a microcystic lymphangioma of the pancreas. Immunohistochemistry showed cystic endothelial cells reactivity to factor Ⅷ -RA （＋＋）, CD31 （＋＋＋） and CD34 （-）. Postoperatively, abdominal pain disappeared and the patient remained symptomfree for 12 mo until now. Although extremely rare, lymphangioma of the pancreas should be taken into consideration as a differential diagnosis of a pancreatic cystic lesion, especially in women.

关键词： Pancreas Cystic lymphangioma Localsurgical excision

Perigastric extraskeletal Ewing's sarcoma: A case report

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World Journal of Gastroenterology 2009年第2期15卷 245-247页

作者： Radoje B Colovic Nikica M Grubor marjan t micev Slavko V Matic Henry Dushan Edward Atkinson Stojan M Latincic Institute for Digestive Diseases Clinical Center of Serbia Koste Todorovica 6 Belgrade 11000 Serbia Imperial College School of Medicine St Mary's Hospital Praed Street London W2 1NY United Kingdom

Ewing's sarcoma (ES) is a neoplasm of undifferentiated small round cells, which occurs in the bones and deep soft tissues of children and adolescents. We present a rare case of a 44-year-old woman with gastric ES presenting with epigastric pain and weight loss. Ultrasound and computed tomography scans indicated a solid/cystic mass in the pancreatic tail. At laparotomy, the tumor was found attached to the posterior surface of the stomach, completely free from the pancreas, with no lymphadenopathy or local metastases. the polynodal, partly pseudocystic, dark-red soft tumor was excised. Histopathology revealed an anaplastic small-round-cell tumor with strong membranous CD99 immunoexpression. Additionally, there was patchy immunostaining for S-100 protein, vimentin, protein gene product (PGP) 9.5 and neuron-specifi c enolase, and weak focal CD117 cytoplasmic immunoreactivity. the patient had no adjuvant chemotherapy; her postoperative recovery was uneventful, and she remains symptom-free, and without any sign of recurrence at 20 mo. to the best of our knowledge, this is only the third ever case of gastric ES.

关键词： Stomach Extraskeletal Ewing's sarcoma

the modeling non-sequential double ionization of helium atom under highintensity femtosecond laser pulses with shielding charge approximation

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Communications in theoretical Physics 2024年第2期76卷 151-156页

作者： marjan Zakavi Mohammad Sabaeian Department of Physics Faculty of ScienceShahid Chamran University of AhvazIran Center for Research on Laser and Plasma Shahid Chamran University of AhvazIran

In this study,we successfully extracted the‘knee structure’for non-sequential double ionization(NSDI)in the helium *** achieve this,for the first time,we solved the time-dependent Schrödinger equation in three dimensions for the helium atom,utilizing the shielding charge *** findings corroborate prior observations by Wang et al[Wang and Eberly,***.105,083001(2010)],demonstrating that NSDI occurs within a narrower time window in circular polarization compared to linear *** a result,the yield of linear polarization was higher than that of circular polarization,aligning with the previously reported ***,in the case of circular polarization,the time window further narrows with increasing intensity,attributed to a decrease in the time-of-flight.

关键词： NSDI knee structure tDSE shielding charge helium 3D-tDSE

Generalized Cline's Formula and Jacobson's Lemma in a Ring

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Algebra Colloquium 2024年第3期31卷 407-416页

作者： Huanyin Chen marjan Sheibani School of Big Data Fuzhou University of International Studies and Trade Fuzhou 350202China Farzanegan Campus Semnan UniversitySemnanIran

present a new generalized version of Cline's formula and Jacobson's lemma for g-Drazin inverses in a *** generalized results extend many known results,e.g.,Chen and Abdolyousefi[Generalized Jacobson's lemma in a Banach algebra,*** 49(2021)3263-3272],and Yan and Zeng[the generalized inverses of the products of two elements in a ring,turkish ***.44(2020)1744-1756].

关键词： Cline's formula Jacobson's lemma generalized Drazin inverse Drazin inverse ring

Late Ordovician Mass Extinction: Earth, fire and ice

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National Science Review 2024年第1期11卷 51-65页

作者： David A.t.Harper Palaeoecosystems Group Department of Earth SciencesDurham University

the Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. two phases have been identified near the start of the Hirnantian period and in the middle. It was a massive taxonomic extinction, a weak phylogenetic extinction and a relatively benign ecological extinction. A rapid cooling, triggering a major ice age that reduced the temperature of surface waters, prompted a drop in sea level of some 100 m and introduced toxic bottom waters onto the shelves. these symptoms of more fundamental planetary processes have been associated with a range of factors with an underlying driver identified as volcanicity. Volcanic eruptions, and other products, may have extended back in time to at least the Sandbian and early Katian, suggesting the extinctions were more protracted and influential than hitherto documented.

关键词： Ordovician LOME paleoecology palaeobiogeography biotas

Preparation of microparticles and nanoparticles using membrane-assisted dispersion,micromixing,and evaporation processes

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Particuology 2024年第1期84卷 30-44页

作者： Goran t.Vladisavljevic Chemical Engineering Department Loughborough UniversityLoughboroughLeicestershire LE113TUUnited Kingdom

Synthetic microporous membranes are increasingly used for energy-efficient and controlled production of micro-and nanoparticles and micro-and nanoemulsions with tuneable morphology and physico-chemical properties through various micromixing,emulsification,and evaporation *** emul-sification processes,the membrane pores are used for dispersed phase injection and size-controlled generation of droplets and droplet-templated *** micromixing processes,membrane is utilised as a micromixer for mixing two miscible liquids,usually solvent and antisolvent-rich solutions,which leads to the creation of supersaturation and subsequent nanoprecipitation or *** mem-brane evaporation processes,membrane is used to prevent phase dispersion while allowing efficient molecular diffusion of solvent and/or antisolvent vapour through gas-filled *** dispersion processes can be operated continuously by decoupling shear stress on the membrane surface from cross flow using tube insets,flow pulsations,swirling flow,membrane oscillations or membrane *** generation and solidification can be performed continuously in a single pass by connecting membrane module with a downstream *** dispersion processes can be used for pro-duction of nanoparticles such as nanovesicles(liposomes,micelles,ethosomes,and niosomes),nanogels,polymeric,lipid and metallic nanoparticles,and *** main advantages of membrane-assisted particle generation are in low energy consumption,controlled geometry and hydrodynamic conditions at the microscale level,flexible throughput due to modular and scalable design of membrane devices,and a wide choice of available microporous membranes with various wall porosities,wetta-bilities,pore sizes,and pore morphologies to suit different applications.

关键词： Nanoparticles Microparticles Nanoemulsions Microemulsions Microporous membrane Crystallisation Flash nanoprecipitation Emulsification Zero liquid discharge

Beta-lactam antibiotic resistance among Escherichia coli isolates from patients with urinary tract infections in Vietnam:A systematic review and meta-analysis

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Asian Pacific Journal of tropical Medicine 2024年第6期17卷 243-255,I0001-I0003页

作者： Dat t Nguyen Princess Margaret Cancer Centre University Health NetworkTorontoOntarioCanada

Objective:to investigate the evolving patterns of antimicrobial resistance against beta-lactam antibiotics in Escherichia coli isolates from urinary tract infection patients in Vietnam,covering the period from 2005 to ***:29 Descriptive studies published between 2010 and 2022 in English and Vietnamese were included in the *** on resistance rates to beta-lactam antibiotics,including cephalosporins and carbapenems,were extracted and *** pooled resistance rates were calculated using random-effects *** trends in resistance were assessed using linear regression ***:Among the beta-lactam antibiotics studied,Escherichia coli exhibited varying levels of resistance,with cephalosporins showing higher resistance rates compared to *** pooled resistance rates were 66%for cefotaxime,65%for ceftriaxone,54%for ceftazidime,and 56%for *** contrast,carbapenems demonstrated lower resistance rates,with weighted pooled resistance rates ranging from 3%to 4%for meropenem,ertapenem,and *** rates were also observed for amoxicillin/clavulanate(35%),ticarcillin/clavulanate(26%),and piperacillin/tazobactam(12%).Significant annual increases in resistance were noted for imipenem(0.56%,Pthis study highlights the critical issue of antimicrobial resistance in urinary tract infections in Vietnam and emphasizes the importance of prudent antibiotic use and the regular monitoring of resistance *** insights are useful for guiding healthcare professionals in optimizing treatment strategies and for policymakers in formulating evidence-based clinical guidelines to combat antibiotic resistance effectively.

关键词： Antimicrobial resistance Urinary tract infection Vietnam

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机器人辅助心电信号监测及康复训练系统

高技术通讯 2024年第5期34卷 535-544页

作者：卢振利朱健美单长考刘燕赵宇 Pencic Marko Cavic'Maja Ilieva Roumiana Mernik marjan 常熟理工学院商学院盐城224051 盐城工学院机械工程学院常熟215500 常熟理工学院电气与自动化工程学院常熟215500 诺维萨德大学技术科学学院塞尔维亚诺维萨德21000 索菲亚工业大学管理学院保加利亚索菲亚1000 马里博尔大学电气工程和计算机科学学院斯洛文尼亚马里博尔462000

在心电信号的基础上设计心脏康复训练系统,本文总结了机器人辅助心脏康复研究国内外现状,从心电监测、机器人辅助康复系统设计上进行阐述。在心电监测装置上实现上下位机通信,在机器人辅助系统设计中,通过使用Visual Studio、Coppeliasi... 详细信息

在心电信号的基础上设计心脏康复训练系统,本文总结了机器人辅助心脏康复研究国内外现状,从心电监测、机器人辅助康复系统设计上进行阐述。在心电监测装置上实现上下位机通信,在机器人辅助系统设计中,通过使用Visual Studio、Coppeliasim及Kinect设备三者进行通信,控制仿真机器人完成康复动作并严格识别、判定患者康复动作合格程度,以此来帮助心脏病患者进行康复动作训练。

关键词：心电监测人机交互心脏康复