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Influence of processing history on microstructure， mechanical properties， and electrical conductivity of Cu-0.7Mg alloy

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Transactions of Nonferrous Metals Society of China 2024年

作者： Alireza KALHOR Kinga RODAK Marek TKOCZ Bartosz CHMIELA Ivo SCHINDLER ?ukasz POLOCZEK Krzysztof RADWA?ski Hamed MIRZADEH Marian KAMPIK Faculty of Materials Engineering， Silesian University of Technology V?B – Technical University of Ostrava， Faculty of Materials Science and Technology Materials Research Group， ?ukasiewicz Upper Silesian Institute of Technology School of Metallurgy and Materials Engineering， College of Engineering， University of Tehran Faculty of Electrical Engineering， Silesian University of Technology

The effects of forward extrusion as well as extrusion combined with reversible torsion (KoBo extrusion)， followed by additional deformation via the MaxStrain module of the Gleeble thermomechanical simulator， on the microstructure， mechanical properties， and electrical conductivity of a Cu-0.7Mg (wt.%) alloy， were investigated in this work. The simulation results highlighted the critical influence of processing history in determining the equivalent strain distribution. The sample subjected to forward extrusion at 400 ℃and subsequent MaxStrain processing (FM sample)， possessed 76% lower grain size compared to the sample processed solely with MaxStrain (AM sample). Likewise， the KoBo-extruded and MaxStrain-processed sample (KM sample) exhibited 66% smaller grain size compared to the AM sample. Tensile test results revealed that the AM， FM， and KM samples， respectively， possessed 251%， 288%， and 360% higher yield strength， and 95%， 121%， and 169% higher tensile strength compared to the initial annealed alloy， as a result of grain refinement as well as deformation strengthening. Finally， the electrical conductivity measurements revealed that AM， FM， and KM samples， respectively， possessed electrical conductivity values of 37.9， 35.6， and 32.0 (MS/m)， which， considering their mechanical properties， makes them eligible to be categorized as high-strength and high-conductivity copper alloys.

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Amylase intrapancreatic infusion delays insulin release during an intravenous glucose tolerance test,proof of acini–islet–acinar interactions

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World Journal of Experimental Medicine 2024年第3期14卷 101-107页

作者： Kateryna Pierzynowska Piotr Wychowański Kamil Zaworski Jarosław Woliński Janine Donaldson Dominika Szkopek Katarzyna Roszkowicz-Ostrowska Agata Kondej Stefan G Pierzynowski Department of Biology Lund UniversityLund 22362Sweden Department of Animal Physiology The Kielanowski Institute of Animal Physiology and NutritionPolish Academy of SciencesJabłonna 05110Poland Anara AB Trelleborg 23132Sweden Department of Head and Neck and Sensory Organs Division of Oral Surgery and ImplantologyInstitute of Clinical DentistryGemelli Foundation for the University PoliclinicCatholic University of the“Sacred Heart”Rome 00168Italy Department of Oral Surgery Medical University of GdańskGdańsk 80211Poland Laboratory of Large Animal Models The Kielanowski Institute of Animal Physiology and NutritionPolish Academy of SciencesJabłonna 05110Poland School of Physiology Faculty of Health SciencesUniversity of the Witwatersrand(WITS)Johannesburg 2050South Africa Department of Medical Biology Institute of Rural HealthLublin 20090Poland

BACKGROUND The possible existence of an acini–islet–acinar(AIA)reflex,involving mutual amylase and insulin interactions,was investigated in the current acute experiment on *** To confirm the existence of an AIA reflex and justify the placement of the exocrine and endocrine pancreatic components within the same *** The study was performed on six pigs under general *** intravenous glucose tolerance test was performed,with a bolus infusion of 50%glucose to the jugular vein,while amylase(5000 U/kg)or vehicle intrapancreatic infusions were administered via the pancreaticoduodenalis cranialis artery during 30 min with a 1 mL/min flow *** The amylase infusion to pancreatic arterial circulation inhibited and delayed the insulin release peak which is usually associated with the highest value of blood glucose and is typically observed at 15 min after glucose infusion,for>1 *** intrapancreatic infusion of the vehicle(saline)did not have any effect on the time frame of insulin *** of 1%bovine serum albumin changed the insulin release curve dramatically and prolonged the high range of insulin secretion,far beyond the glucose *** Intrapancreatic arterial infusion of amylase interrupted the integrated glucose–insulin *** confirms an AIA reflex and justifies placement of the exocrine and endocrine pancreatic components within the same organ.

关键词： Amylase Glucose-insulin-amylase interaction Intravenous glucose tolerance test Acini-islet-acinar axis Insulin

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银行经济资本管理价值创造的理论研究

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区域金融研究 2024年第3期 43-51页

作者：王燕魏鲁彬中国农业发展银行北京100045

经济资本管理是银行建立资本约束机制、落实资本监管要求的重要手段。传统经营管理将资金视为稀缺资源,关注信贷资金的分配问题,追求单位资金收益最大化;经济资本管理则将合格资本决定的可承担风险总量视为稀缺资源,研究风险承担的分配... 详细信息

经济资本管理是银行建立资本约束机制、落实资本监管要求的重要手段。传统经营管理将资金视为稀缺资源,关注信贷资金的分配问题,追求单位资金收益最大化;经济资本管理则将合格资本决定的可承担风险总量视为稀缺资源,研究风险承担的分配问题,追求单位风险收益最大化。正是配置资源与目标的转变使得经济资本管理能够提升银行风险管理水平、完善投资回报的价值衡量并畅通内部信息传递机制,但实施经济资本管理具有一定的管理与技术水平要求。实践中,银行可能因内部信用评级建设与信息系统水平等限制而影响经济资本管理发挥作用。基于此,应坚持以风险调整资本回报率(RAROC)最大化作为经济资本配置的基本原则,并加强精细化管理以提高相关指标的科学水平。

关键词：经济资本管理资本约束 RAROC 经济增加值

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Bone graft incorporation failure with inappropriate limb load transfer can lead to aseptic acetabular loosening of metal-on-metal prosthesis: A case report

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World Journal of Orthopedics 2024年第7期15卷 668-674页

作者： RafałStanisław Domagalski Bogdan Dugiełło Sonia Rokicka Szymon Czech RafałSkowroński Dominika Rokicka Marta Patrycja Wróbel Krzysztof Strojek Tomasz Stołtny District Hospital of Orthopaedics and Trauma Surgery in PiekaryŚląskie PiekaryŚląskie 41-940Poland District Railway Hospital Medical University of SilesiaKatowice 40-760Poland Faculty of Medicine Medical University of GdańskGdańsk 80-210Poland “ALFA”Orthopaedics and Traumatology Center Białystok 15-763Poland Department of Internal Medicine Diabetology and Cardiometabolic DisordersFaculty of Medical Sciences ZabrzeMedical University of SilesiaZabrze 41-800Poland

BACKGROUND Aseptic acetabular loosening can result from various factors that can be categorized into groups:patient-related,surgeon-related and *** present a case of a 63-year-old patient who at first underwent a total hip arthro-plasty(THA)using a metal-on-metal bearing due to hip ***-up visits revealed no complications after the *** years after the THA,acetabular component loosening occurred due to subsequent trauma of the opposite hip,necessitating a revision THA using a ceramic-on-ceramic *** SUMMARY We aim to illustrate a rare case where the primary reason for undergoing THA revision was not only incomplete bone graft incorporation but also improper limb load *** the revision arthroplasty,a 9-year follow-up visit revealed improvements in all evaluation measures on questionnaire compared to the state before surgery:Harris Hip Score(before surgery:15;after surgery:95),Western Ontario and McMaster Universities Arthritis Index(before surgery:96;after surgery:0),and Visual Analogue Scale(before surgery:10;after surgery:1).CONCLUSION Opposite-hip trauma caused a weight transfer to the limb after a THA *** process led to a stress shielding effect,resulting in acetabular component loosening.

关键词： Acetabular loosening Limb load Stress shielding effect Revision hip arthroplasty Case report

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Structure and corrosion resistance of Al–Cu–Fe alloys

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Progress in Natural Science:Materials International 2020年第3期30卷 393-401页

作者： Rafa? Babilas Anna Bajorek Monika Spilka Adrian Radoń wojciech ?oński Department of Engineering Materials and Biomaterials Silesian University of Technology Institute of Physics University of Silesia in Katowice ?ukasiewicz Research Network-Institute of Non-Ferrous Metals

The microstructure and electrochemical properties of Al–Cu–Fe alloys with the atomic compositions of Al65Cu20Fe15,Al78Cu7Fe15and Al80Cu5Fe14Si1have been *** alloys were produced by induction melting of pure elements with copper mold *** microstructure of the alloys was analyzed by X-ray diffraction and high-resolution transmission electron *** formation of quasicrystalline phases in the Al–Cu–Fe alloys was *** presence of intermetallic phases was observed in the alloys after crystallization in a form of ingots and *** electrochemical measurements were conducted in 3.5%NaCl *** electronic structure of the alloys was determined by X-ray photoelectron *** post corrosion surface of the samples was checked using a scanning electron microscope equipped with the energydispersive X-ray *** was observed that the Al65Cu20Fe15alloy had the highest corrosion *** improved corrosion resistance parameters were noted for the plate samples rather than those in the as-cast *** the hardness of the Al65Cu20Fe15alloy was significantly higher than the other alloy samples.

关键词： Al-Cu-Fe alloys Copper mold casting X-ray diffraction High-resolution transmission electron microscopy X-ray photon spectroscopy Electrochemical impedance spectroscopy

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Acute coalescent mastoiditis in a 16-month-old child due to Streptococcus pneumoniae infection

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Journal of Acute Disease 2024年第1期13卷 36-39页

作者： Magdalena Pszczołowska Monika Morawska-Kochman Katarzyna Resler Katarzyna Pękalska Tomasz Zatoński Department and Clinic of Otolaryngology Head and Neck SurgeryWrocław Medical UniversityBorowska 213WrocławPoland Department of General Radiology Interventional Radiology and NeuroradiologyWrocław Medical UniversityBorowska 213WrocławPoland

Rationale:Acute otitis media is a common disease in early childhood,and is usually caused by Streptococcus pneumoniae(***).Acute mastoiditis is a complication of acute otitis media and can involve not only the mucoperiosteum of the middle ear but can also spread to the periosteum by destroying the mastoid bone(acute coalescent mastoiditis).In addition,the infection can extend through the surrounding bones or the emissary veins beyond the mastoid’s air cells,leading to subperiosteal ***’s Concern:A 16-month-old female patient was hospitalized due to the purulent discharge of the left ear and the symptoms of right mastoiditis(swelling and redness of the skin).Diagnosis:Bilateral acute coalescent mastoiditis caused by *** *** computer tomography revealed bilateral bone destruction of the mastoid and abscesses found behind the auricle on both ***:The patient underwent intravenous antibiotic therapy and surgical ***:The patient was discharged 14 days after hospitalization with an improved ***:Improperly treated acute coalescent mastoiditis can lead to extracranial and intracranial complications,sometimes serious and even *** are prevalent in children under 2 years,in whom the disease progresses more rapidly and *** vaccination with a 13-valent vaccine may not result in sufficient immunity against ***,a predominant pathogen in children affected by acute coalescent mastoiditis.

关键词： Acute otitis media Acute coalescent mastoiditis Streptococcus pneumoniae Children Case report

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Low-grade myofibrosarcoma of the maxillary sinus:Two case reports

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World Journal of Clinical Oncology 2024年第4期15卷 566-575页

作者： Anna Mydlak ŁukaszŚcibik Monika Durzynska Jakub Zwoliński Karolina Buchajska Olga Lenartowicz Jakub Kucharz Department of Head and Neck Cancer Maria Sklodowska-Curie National Research Institute of OncologyWarsaw 02-781Poland Department of Otolaryngology and Head and Neck Oncological Surgery The 5th Military Clinical Hospital with PolyclinicKrakow 30-901Poland Department of Pathology Maria Sklodowska-Curie National Research Institute of OncologyWarsaw 02-781Poland Department of Genitourinary Oncology Maria Sklodowska-Curie National Research Institute of OncologyWarsaw 02-781Poland

BACKGROUND Low-grade myofibroblastic sarcoma(LGMS)is an extremely rare tumor characterized by the malignant proliferation of *** most commonly develops in adults,predominantly in males,in the head and neck region,oral cavity,especially on the tongue,mandible,and *** article presents 2 cases of LGMS localized to the maxillary sinus and provides an overview of the available *** SUMMARY Two patients with LGMS located in the maxillary sinus underwent surgery at the Department of Head and Neck *** 1:A 46-year-old patient was admitted to the clinic with suspected LGMS recurrence in the right maxillary sinus(rT4aN0M0),with symptoms of pain in the suborbital area,watering of the right eye,thick discharge from the right nostril,and augmented facial *** open biopsy-confirmed LGMS,the patient underwent expanded maxillectomy of the right side with immediate palate reconstruction using a microvascular skin flap harvested surgically from the middle *** patient qualified for adjuvant radiotherapy for the postoperative bed,with an additional ***,the patient is under 1.5 years of observation with no evidence of *** 2:A 45-year-old man was admitted to our clinic with facial asymmetry,strabismus,exophthalmos,and visual impairment in the right *** months earlier,the patient had undergone partial jaw resection at another hospital for fibromatosis.A contrast-enhanced computed tomography scan revealed a tumor mass in the postoperative log after an earlier *** open biopsy confirmed lowgrade fibrosarcoma(rT4aN0M0).The patient qualified for an extended total right maxillectomy with orbital excision and right hemimandibulectomy with immediate microvascular reconstruction using an anterolateral thigh *** patient subsequently underwent adjuvant radiotherapy to the postoperative *** 9 months,recurrence occurred in the right mandibular arch below the irradiated *** lesion infiltrated t

关键词： Head and neck cancer Paranasal sinuses Maxillary sinus Sarcoma Low-grade myofibroblastic sarcoma Case report

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The Influence of Environmental Factors on the Behavior and Mortality Risk of Polypedates megacephalus Tadpoles

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Asian Herpetological Research 2021年第1期12卷 100-109页

作者： Jakub PACON wojciech KRUSZYNski Jaroslaw PACON Department of Genetics Wroclaw University of Environmental and Life SciencesKozuchowska 751-631 WroclawWroclaw 51631Poland Department of Internal Medicine and Clinic of Diseases of Horses Dogs and CatsWroclaw University of Enviromnental and Life SciencesPl.Grunwaldzki 4750-366 WroclawWroclaw 50366Poland

Since tadpoles change their behavior when facing adverse environmental conditions, observing tadpoles in a tank can help detect problems in their ma intena nce. Detecting such a bnormal behavior early, an amphibian breeder can react quickly, by changing the conditions. If quick and appropriate, such a reaction can save unnecessary deaths. The paper presents an experimental study on the behavior of tadpoles of Polypedates megacephalus in various adverse environmental conditions. In addition to a control 25-liter tank, 5-liter tanks with 10 tadpoles each were studied, each having various improper conditions. Observations included the degree of tank exploration by the tadpoles, their mortality, anomalies in swimming behavior, and eating behavior.

关键词： Polypedates megacephalus tadpole mortality the spot-legged tree frog

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Path analysis and estimation of additive and epistatic gene effects of barley SSD lines

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Journal of Integrative Agriculture 2016年第9期15卷 1983-1990页

作者： Jan Bocianowski Katarzyna Górczak Kamila Nowosad wojciech Rybiński Dariusz Piesik Department of Mathematical and Statistical Methods Poznań University of Life Sciences Department of Genetics Plant Breeding and Seed Production Wroc?aw University of Environmental and Life Sciences Institute of Plant Genetics Polish Academy of Sciences Department of Entomology and Molecular Phytopathology UTP University of Science and Technology

In the paper presented, 99 single seed descent barley lines as well as their parental forms Roland and Apex were studied. The grain weight components and their interrelations were analyzed using simple coefficients of correlation. The direct and indirect effects of such components on grain weight per plant and 1 000-grain weight were estimated using path analysis. In the 2006 and 2007, the spike length and number of spikelets per spike were the determinants of grain weight. Genetic parameters as additive and epistasis effects were estimated for all studied traits. The results indicate the importance of both additive and epistasis gene effects of number of spikes per plant, grain weight per spike, grain number per plant and grain weight per plant in this study.

关键词： path analysis additive effect epistasis single seed descent(SSD) barley

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Energy and blast performance of beryllium in a model thermobaric composition in comparison with aluminum and magnesium

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Defence Technology（防务技术） 2024年第6期36卷 13-19页

作者： Thomas M.Klapotke Stanisław Cudziło Waldemar A.Trzcinski Jozef Paszula Energetic Materials Research Department of ChemistryUniversity of Munich(LMU)Butenandtstrasse 5-13(D)81377MunichGermany Military University of Technology Faculty of Advanced Technologies and ChemistrySylwester Kaliski Str.200-908WarsawPoland

A direct comparison is made between the effectiveness of Al,Mg,and Be powders as additional fuels in model thermobaric compositions containing 20%fuel,20%ammonium perchlorate,and 60%RDX(1,3,5-Trinitro-1,3,5-triazacyclohexane)passivated with *** determined calorimetric measurements of the heat of detonation,along with the overpressure histories in an explosion chamber filled with nitrogen,were used to determine the quasi-static pressure(QSP)under anaerobic *** measurements were also performed in a semi-closed bunker,and all blast wave parameters generated after the detonation of 500 g charges of the tested explosives were *** calorimetry results,QSP values,and blast wave parameters(pressure amplitude,specific and total impulses)clearly indicate that Be is much more effective as an additional fuel than either Al or Mg in both anaerobic post-detonation reactions as well as the subsequent aerobic *** heat of detonation of the RDXwax/AP/Be explosive mixture is over 40%and 50%higher than that of the mixture containing aluminum and magnesium instead of beryllium,***,the TNT equivalent of the Be-containing composition due to the overpressure in the nitrogen-filled explosion chamber is 1.66,while the equivalent calculated using an air shock wave-specific impulse at a distance of 2.5 m is equal to *** high values of these parameters confirm the high reactivity of beryllium in both the anaerobic and aerobic stages of the thermobaric explosion.

关键词： Thermobaric explosives Beryllium Heat of detonation Quasi-static overpressure Blast wave parameters

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