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The effect of electrical current on lubricant film thickness in boundary and mixed lubrication contacts measured with ultrasound

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Friction 2024年第8期12卷 1882-1896页

作者： Julio A.CAO-ROMERO-GAllEGOS Saeid TAGHIZAdeH Oscar A.AGUIlAR-ROSAS R.S.DWYER-joyce leonardo I.FARFAN-CABRERA Tecnologico de Monterrey Escuela de Ingeniería y CienciasAve.Eugenio Garza Sada 2501MonterreyN.L.64849México department of Mechanical Engineering Leonardo Centre for TribologyUniversity of SheffieldSheffield S13JDUK

This work explores experimentally the effects of DC electrical currents on lubricant film thickness alteration in lubricated sliding steel contacts in the boundary and mixed regime as measured by *** experiments were performed in a two-electrode cell-based pin-on-disk tester instrumented with ultrasonic *** and electrified tribological tests were conducted on steel flat-on-flat contacts under various speeds and loads using both a mineral base oil and a gear *** thickness,coefficient of friction(CoF),and electrical contact resistance(ECR)were measured during short experiments(30 s)in unelectrified and electrified(1.5 and 3 A)*** results suggest that film thickness,CoF,and all ECR are altered by passing DC currents through the *** particular,film thickness increased and decreased,respectively,by applying electricity at the different speeds and loads *** alterations were majorly ascribed to oil viscosity decrease by local heat and surface oxidation caused by electrical discharge and break down at the interface.

关键词： electrified sliding ultrasonic measurement electric vehicles pin-on-disk

Non-invasive Angiographic-based Fractional Flow Reserve:Technical development,Clinical Implications,and Future Perspectives

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当代医学科学(英文) 2023年第3期43卷 423-433页

作者： joyce Peper Michiel l.Bots Tim leiner Martin J.Swaans department of Cardiology St.Antonius HospitalNieuwegein 3435 CMThe Netherlands department of Radiology University Medical Center UtrechtUtrecht 3508 GAThe Netherlands Julius Center for Health Sciences and Primary Care University Medical Center UtrechtUtrecht 3584 CGThe Netherlands

New non-and less-invasive techniques have been developed to overcome the procedural and operator related burden of the fractional flow reserve(FFR)for the assessment of potentially significant stenosis in the coronary *** FFR-techniques can obviate the need for the additional flow or pressure wires as used for FFR *** review provides an overview of the developments and validation of the virtual FFR-algorithms,states the challenges,discusses the upcoming clinical trials,and postulates the future role of virtual FFR in the clinical practice.

关键词： coronary artery disease quantitative flow ratio fractional flow reserve diagnostic accuracy physiology guided percutaneous coronary intervention

Homicidal Abuse of Young Children:A Historical Perspective

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Journal of Forensic Science and Medicine 2017年第2期3卷 97-110页

作者： Rudy J Castellani joyce l dejong Carl J Schmidt department of Pathology Western Michigan University Homer Stryker M.D.School of MedicineKalamazoo department of Pathology Wayne County Medical ExaminerUniversity of MichiganDetroitMlUSA

The past 50 years has seen a heightened awareness of abusive injury patterns and increased concern for the plight of children victimized by their *** of the young,however,has been embedded in society since the beginning of recorded ***,nature provides abundant examples of infanticide in lower animals,raising the question of whether exploitation,apathy,and violence toward children are on some level evolutionarily *** human antiquity,selective killing of females,the illegitimate,and the malformed,killing by ritualistic sacrifice or to conserve resources was carried out with *** middle ages and later saw a decline in these practices albeit *** hundred years into the industrial revolution,with harsh child labor in public view,legal remedies were sought to protect children but with little *** domestic abuse of children was not addressed until a pivotal 19^(th)-century case,in which the rights of animals were invoked to intervene on behalf of a *** the 20th century,physicians began to look closely at anatomical findings;patterns due to trauma,especially inflicted trauma,began to emerge.“Battered child syndrome”was followed by“shaken baby syndrome”,the latter prompted by the recurrent findings of subdural hematoma,retinal hemorrhages,and brain injury with the absence of impact injuries and no plausible accidental or natural disease *** the 21st century,high-quality studies and an emphasis on evidenced-based medicine substantiated the existence ofiiijury patterns resulting from homicidal ***,progress has been uneven.A case of child abuse that reached the US Supreme Court resulted in an ill-cited dissent that seems to have amplified an already toxic medicolegal environment,perhaps *** difficulties in balancing the welfare of society with that of caregivers in the aftermath of homicidal abuse will no doubt continue.

关键词： Abusive head trauma child abuse homicide infanticide

草原田鼠和草甸田鼠波动种群雌鼠的攻击性(英文)

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兽类学报 2004年第2期24卷 125-131页

作者： joyce E. Hofmann lowell l. Getz Illinois Natural History Survey 607 E. Peabody Dr.Champaign IL 61820 USA) (Department of Animal BiologyUniversity of IllinoisIllinois Natural History Survey 607 E. Peabody Dr.Champaign IL 61820 USA) (Department of Animal BiologyUniversity of Illinois 505 S. Goodwin Ave. Urbana IL 61801USA505 S. Goodwin Ave. Urbana IL 61801USA

本文比较研究了草原田鼠和草甸田鼠自然种群在不同密度周期时相雌鼠攻击水平的变化。结果表明,不同密度时相,草原田鼠种群中攻击雌鼠所占比例以及接近、威胁、进攻、退避,进攻/接近等5种行为变量均无显著的差异,5种行为变量与种群密度... 详细信息

本文比较研究了草原田鼠和草甸田鼠自然种群在不同密度周期时相雌鼠攻击水平的变化。结果表明,不同密度时相,草原田鼠种群中攻击雌鼠所占比例以及接近、威胁、进攻、退避,进攻/接近等5种行为变量均无显著的差异,5种行为变量与种群密度亦均不呈显著的线形相关关系。然而,草甸田鼠在不同密度时相攻击雌鼠的比例差异显著。低密度时相,雌鼠发生威胁行为的平均次数显著高于上升和衰减时相,进攻行为的平均次数亦显著高于其它时相。本研究结果不支持有关田鼠种群在一个完整的周期过程中具有多态性行为的假设。

关键词：草原田鼠草甸田鼠种群密度雌鼠攻击行为 Chitty假说

The mini player with diverse functions:extracellular vesicles in cell biology,disease,and therapeutics

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Protein & Cell 2022年第9期13卷 631-654页

作者： Abhimanyu Thakur Xiaoshan Ke Ya-Wen Chen Pedram Motallebnejad Kui Zhang Qizhou lian Huanhuan joyce Chen The Pritzker School of Molecular Engineering The University of ChicagoChicagoIllinoisUSA The Ben May department for Cancer Research The University of ChicagoChicagoIllinoisUSA Division of Pulmonary Critical Care and Sleep MedicineDepartment of MedicineKeck School of MedicineHastings Center for Pulmonary ResearchUniversity of Southern CaliforniaLos AngelesCA 90089USA department of Stem Cell Biology and Regenerative Biology Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCA 90089USA department of Medicine Li Ka Shing Faculty of MedicineThe University of Hong KongPok Fu LamHong Kong Prenatal Diagnostic Center and Cord Blood Bank Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhouChina HKUMed laboratory of Cellular Therapeutics the University of Hong KongPok Fu LamHong Kong

Extracellular vesicles(EVs)are tiny biological nanovesicles ranging from approximately 30–1000 nm in diameter that are released into the extracellular matrix of most cell types and in *** classification of EVs includes exosomes,microvesicles,and apoptotic bodies,dependent on various factors such as size,markers,and biogenesis *** transition of EV relevance from that of being assumed as a trash bag to be a key player in critical physiological and pathological conditions has been revolutionary in many *** have been recently revealed to play a crucial role in stem cell biology and cancer progression via intercellular communication,contributing to organ development and the progression of *** review focuses on the significant research progress made so far in the role of the crosstalk between EVs and stem cells and their niche,and cellular communication among different germ layers in developmental *** addition,it discusses the role of EVs in cancer progression and their application as therapeutic agents or drug delivery *** such discoveries have been facilitated by tremendous technological advancements in EV-associated research,especially the microfluidics *** pros and cons in the context of characterization of EVs are also extensively discussed in this *** review also deliberates the role of EVs in normal cell processes and disease conditions,and their application as a diagnostic and therapeutic ***,we propose future perspectives for EV-related research in stem cell and cancer biology.

关键词： extracellular vesicles exosomes stem cells cancer exosomal communication exosomal therapeutics

家用食物铁强化剂Spr inkles的应用(英文)

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营养学报 2004年第3期26卷 161-166页

作者： joyce Yap Caraline Cheng David l.Yenng 中国亨氏公司广州美国亨氏公司美国宾夕法尼亚州匹兹堡

铁缺乏与缺铁贫血(IDA)仍是世界上盛行的营养问题。在婴幼儿中,IDA对生长发育能产生不良反应。Sprinkles含有延胡索酸铁及其他微量营养素,涂以大豆脂类。Sprinkles包装成小袋,可加入即食的家庭制备的辅食中,每日一次。在中国5个城市中对... 详细信息

铁缺乏与缺铁贫血(IDA)仍是世界上盛行的营养问题。在婴幼儿中,IDA对生长发育能产生不良反应。Sprinkles含有延胡索酸铁及其他微量营养素,涂以大豆脂类。Sprinkles包装成小袋,可加入即食的家庭制备的辅食中,每日一次。在中国5个城市中对6～12个月龄婴儿和2～5岁幼儿进行连续4w供给Sprinkles以了解他们的接受程度,实验期间进行4次随访。结果表明,婴幼儿对添加Sprinkles的食物能很好的接受,母亲们很愿意购买上市产品。

关键词： Sprinkles 强化铁缺铁性贫血

Conservative management of small bowel perforation in Ehlers-Danlos syndrome type Ⅳ

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World Journal of Gastrointestinal Endoscopy 2013年第8期5卷 398-401页

作者： Satya Allaparthi Himanshu Verma David l Burns Ann M joyce department of Medicine Saint Vincent Hospital department of Gastroenterology Lahey Clinic

Ehlers-Danlos syndrome (EDS) is a group of inherited connective tissue disorders caused by collagen synthesis defects. EDS type Ⅳ, or vascular EDS, is caused by loss-of-function mutations in the type Ⅲ pro-collagen gene (COl3A1 ). Common complications of EDS type IV include gastrointestinal bleeding and bowel perforations, posing diagnostic and therapeutic dilemmas for both surgeons and gastroenterologists. Here, we describe a complicated case of EDS type Ⅳ in a 35-year-old caucasian female who presented with overt gastro-intestinal bleeding. The patient had a prior history of spontaneous colonic perforation, and an uncomplicated upper endoscopy was performed. A careful ileoscopy was terminated early due to tachycardia and severe ab-dominal pain, and a subsequent computed tomography scan confirmed the diagnosis of ileal perforation. The patient was managed conservatively, and demonstrated daily improvement. At the time of hospital discharge, no further episodes of gastrointestinal blood loss had occurred. This case highlights the benefit of conservative management for EDS patients with gastrointestinal hemorrhage. It is recommended that surgical treatmentshould be reserved for patients who fail conservative treatment or in cases of hemodynamic instability. Finally, this case demonstrates the necessity for a higher threshold of operative or endoscopic interventions in EDS type Ⅳ patients.

关键词： Type-Ⅳ Ehlers-Danlos syndrome Gastro-intestinal hemorrhage Bowel perforation Conservative management Non-operative COl3A1 Connective tissue disorder

鼠类种群动态:食物资源影响力的实验评估(英文)

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兽类学报 2006年第2期26卷 114-122页

作者： lowell l. Getz Arpat Ozgul Madan K. Oli joyce E. Hofmann Betty McGuire department of Animal Biology University of Illinois 2113 Lynwood Drive Champaign IL 61821 USA department of Wildlife Ecology and Conservation University of Florida 110 Newins-Ziegler Hall Gainesville FL 32611 USA Illinois Natural History Survey 607 E. Peabody Drive Champaign IL 81820 USA department of Ecology and Evolutionary Biology Cornell UniversityCorson Hall Ithaca NY 14853 USA

本研究在美国伊利诺斯州中东部测定了中等食物质量(莓系属的牧草)和低食物质量(高杆草牧场)栖息地内橙腹田鼠(Microtusochrogaster)和草原田鼠(***)种群对附加食物的响应。在中等食物质量栖息地内投放附加食物,橙腹田鼠种群的波动幅度... 详细信息

本研究在美国伊利诺斯州中东部测定了中等食物质量(莓系属的牧草)和低食物质量(高杆草牧场)栖息地内橙腹田鼠(Microtusochrogaster)和草原田鼠(***)种群对附加食物的响应。在中等食物质量栖息地内投放附加食物,橙腹田鼠种群的波动幅度高于对照样地,但同类型食物质量栖息地内,种群平均密度和波动模式无显著的差异。仅在低等食物质量的高杆草栖息地内,投放附加食物可导致草原田鼠的种群密度高于对照样地。附加食物不直接影响两种栖息地内橙腹田鼠的成活率或成熟率,在中等食物质量栖息地中投放附加食物,繁殖活跃的成熟雌性个体比例及雄性成体的体重高于对照。附加食物不影响莓系属牧草内草原田鼠,也不能影响该动物在高杆草环境中的存活率。然而,投放附加食物,可缩短低等食物质量栖息地内草原田鼠的成熟期,提高繁殖活跃雌性的比例和迁入个体比例,增加并引起雄性个体体重增加。据此,本研究证明食物资源在橙腹田鼠和草原田鼠种群动态中只起极小的作用。

关键词：数量统汁食物资源橙腹田鼠草原田鼠附加食物

Nutritional Quality of Olives and Olive oil Produced in the Serra Da Mantiqueira from Brazil

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Agricultural Sciences 2017年第7期8卷 518-526页

作者： Angelo Alberico Alvarenga joyce ludimila da Cruz Adelson Francisco de Oliveira luiz Fernando de Oliveira da Silva Emerson Dias Goncalves Paulo Marcio Norberto Researchers/Scholarship BIP FAPEMIG/EPAMIG SulBrazil Scholarship PIBIC FAPEMIG/EPAMIG SulBrazil

The olive tree (Olea europaea l.) is one of the oldest fruits grown by man. Its fruit can be processed into olive oil or treated properly and serve directly for the in natura consumption in the form of olives. Extracted from the olive, the olive oil is highly valued in the market, for its nutritional benefits and also for its unique and delicate flavor. Brazil is the second largest importer of olive oil in the world, but technology is already available and the expansion of the crop has been taking place in the south-southeast regions, where the climate is favorable, in order to serve this market. The objective of this work was to evaluate the physical and chemical qualities of the olives and characterize, sensorially and chemically, olive oils from different olive cultivars planted in the Region of Serra da Mantiqueira. The olives and olive oils produced from the cultivars Arbequina, Arbosana, Grapolo 541, Koroneiki and Maria da Fé were evaluated at the EPAMIG Experimental Field of Maria da Fé, Minas Gerais, and Brazil. In the first experiment the olives harvested in February of 2015 were analyzed in terms of weight, volume, transverse and longitudinal diameter of the fruit and the lump and the relation of the olive/lump and the chemical (protein, lipid, moisture and ashes). In the second experiment the olives were processed by the grinding, beating and centrifugation method to obtain the oils. The olive oils were analyzed for acidity, peroxide index and absorbance in the ultraviolet region at 274 nm, 270 nm, 266 nm and 232 nm. After this characterization the olive oils produced in the Serra da Mantiqueira were then submitted to sensorial analysis. The results were submitted to analysis of variance and the means were compared by the Tukey test at 5% of probability. The interpretation of the data from the sensorial analysis was done using the software sensomaker. Differences were observed between olives and olive oils produced by different cultivars in the Serra da M

关键词： Diet Health Cooking