检索结果-内蒙古大学图书馆

46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： L'Orsa, Rachael Bisht, Anupam Yu, Linhui Murari, Kartikeya Westwick, David T. Sutherland, Garnette R. Kuchenbecker, Katherine J. The Schulich School of Engineering's Department of Electrical and Software Engineering University of Calgary Calgary Canada Project neuroArm Cumming School of Medicine University of Calgary Calgary Canada The Haptic Intelligence Department Max Planck Institute for Intelligent Systems Stuttgart Germany The Schulich School of Engineering's Department of Biomedical Engineering University of Calgary Calgary Canada The Hotchkiss Brain Institute Cumming School of Medicine University of Calgary Calgary Canada

ISBN: (纸本)9798350371499

The surgical procedure of needle thoracostomy temporarily corrects accidental over-pressurization of the space between the chest wall and the lungs. However, failure rates of up to 94.1% have been reported, likely because this procedure is done blind: operators estimate by feel when the needle has reached its target. We believe instrumented needles could help operators discern entry into the target space, but limited success has been achieved using force and/or position to try to discriminate needle puncture events during simulated surgical procedures. We thus augmented our needle insertion system with a novel in-bore double-fiber optical setup. Tissue reflectance measurements as well as 3D force, torque, position, and orientation were recorded while two experimenters repeatedly inserted a bevel-tipped percutaneous needle into ex vivo porcine ribs. We applied model-free puncture detection to various filtered time derivatives of each sensor data stream offline. In the held-out test set of insertions, puncture-detection precision improved substantially using reflectance measurements compared to needle insertion force alone (3.3-fold increase) or position alone (11.6-fold increase). © 2024 IEEE.

关键词： Needles

来源：评论

学校读者我要写书评

暂无评论

Mitochondria-specific near-infrared photoactivation of peroxynitrite upconversion luminescent nanogenerator for precision cancer gas therapy

引用

Acta Pharmaceutica Sinica B 2024年第1期14卷 378-391页

作者： Hui Yu Aliya Tiemuer Xufeng Yao Mingyuan Zuo Hai-Yan Wang Yi Liu Xiaoyuan Chen Department of Biomedical Engineering School of EngineeringChina Pharmaceutical UniversityNanjing 211198China School of Mechanical Engineering Southeast UniversityNanjing 211189China Departments of Diagnostic Radiology SurgeryChemical and Biomolecular Engineeringand Biomedical EngineeringYong Loo Lin School of Medicine and College of Design and EngineeringNational University of SingaporeSingapore 119074Singapore Clinical Imaging Research Centre Centre for Translational MedicineYong Loo Lin School of MedicineNational University of SingaporeSingapore 117599Singapore Nanomedicine Translational Research Program Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore Institute of Molecular and Cell Biology Agency for ScienceTechnologyand Research(A*STAR)ProteosSingapore 138673Singapore

Gas therapy is emerging as a highly promising therapeutic strategy for cancer ***,there are limitations,including the lack of targeted subcellular organelle accuracy and spatiotemporal release precision,associated with gas *** this study,we developed a series of photoactivatable nitric oxide(NO)donors NRh-R-NO(R=Me,Et,Bn,iPr,and Ph)based on an N-nitrosated upconversion luminescent rhodamine *** the irradiation of 808 nm light,only NRh-Ph-NO could effectively release NO and NRh-Ph with a significant turn-on frequency upconversion luminescence(FUCL)signal at 740 nm,ascribed to lower N-N bond dissociation *** also investigated the involved multistage near-infrared-controlled cascade release of gas therapy,including the NO released from NRh-Ph-NO along with one NRh-Ph molecule generation,the superoxide anion O_(2)^(⋅−)produced by the photodynamic therapy(PDT)effect of NRh-Ph,and highly toxic peroxynitrite anion(ONOO‒)generated from the co-existence of NO and O_(2)^(⋅−).After mild nano-modification,the nanogenerator(NRh-Ph-NO NPs)empowered with superior biocompatibility could target *** an 808 nm laser irradiation,NRh-Ph-NO NPs could induce NO/ROS to generate RNS,causing a decrease in the mitochondrial membrane potential and initiating apoptosis by caspase-3 activation,which further induced tumor immunogenic cell death(ICD).In vivo therapeutic results of NRh-Ph-NO NPs showed augmented RNS-potentiated gas therapy,demonstrating excellent biocompatibility and effective tumor inhibition guided by real-time FUCL ***,this versatile strategy defines the targeted RNS-mediated cancer therapy.

关键词： Near infrared Photo-triggered Mitochondrion Upconversion luminescent bioimaging Peroxynitrite Nanogenerator Gas therapy In vivo

来源：评论

学校读者我要写书评

暂无评论

Scalable electrochemical grafting of anthraquinone for fabrication of multifunctional carbon fibers

引用

Journal of Materials Science & Technology 2024年第33期200卷 162-175页

作者： Piers Coia Bhagya Dharmasiri Filip Stojcevski David J.Hayne Elmer Austria Jr. Behnam Akhavan Joselito M.Razal Ken Aldren S.Usman Melissa K.Stanfield Luke C.Henderson Institute for Frontier Materials Deakin UniversityWaurn PondsVictoria 3216Australia DSTG Victoria 3168Australia School of Biomedical Engineering Faculty of EngineeringUniversity of SydneySydneyNSW 2006Australia School of Engineering University of NewcastleCallaghanNSW 2308Australia Hunter Medical Research Institute(HMRI) Precision Medicine ProgramNew Lambton Heights NSW 2305Australia School of Natural Sciences–Chemistry University of TasmaniaHobartTasmania 7005Australia

Carbon fiber electrodes were prepared by grafting anthraquinone molecules via a scalable electrochemical approach which simultaneously increased interfacial and electrochemical capacitance *** this work,anthraquinone diazonium salts were synthesized and grafted onto carbon fiber tows at various *** modified fibers were subsequently evaluated mechanically and electrochemically to analyze their suitability in structural *** to control fibers,the grafted anthraquinone groups resulted in a 30%increase in interfacial shear strength(IFSS)and 6.6×increase in specific *** application was also a focus thus carbon fibers were also modified with insitu generated diazonium salts to determine the applicability to an in-line industrial ***,potentiostatic functionalization of fibers with in-situ generated diazonium salts AQ-1 and AQ-2,showed 3×and 4.3×increase in specific capacitance,respectively,relative to unmodified carbon fiber(CF).We expect that implementing a scalable method to introduce a conductive and electrochemically active covalently bound surface chemistry layer onto carbon fiber exhibits a higher specific capacitance than carbon fiber grafted with most other small molecules reported in *** will open new avenues for manufacturing multifunctional and high-performance fibers with tailored properties for specific/targeted applications.

关键词： Carbon fiber Energy storage Interface Surface modification

来源：评论

学校读者我要写书评

暂无评论

Sensitivity-Enhanced CSRR-Loaded SIW Chipless Tag for Real-Time Coating Assessment on Medical Implants

Sensitivity-Enhanced CSRR-Loaded SIW Chipless Tag for Real-T...

引用

Antennas and Propagation & USNC/URSI National Radio Science Meeting

作者： Amirhossein Yazdanicherati Maryam Badv Zahra Abbasi Department of Electrical and Software Engineering Schulich School of Engineering University of Calgary Canada Department of Biomedical Engineering Schulich School of Engineering University of Calgary Canada

ISBN: (数字)9798350369908

ISBN: (纸本)9798350369915

In this study, a new chipless Complementary Split-ring Resonators (CSRR) loaded Substrate Integrated Waveguide (SIW) tag is coupled with a coplanar antenna for real-time sensing and detection. This sensor was created for real-time monitoring of lubricant evaporation on surfaces that have been infused with lubricant. The stability of the lubricating layer is a crucial determinant for the efficient operation of these coatings. The proposed sensor consists of an ultrawide-band antenna as a reader to couple power to the CSSR-loaded SIW sensing tag. The sensor design and operation have been carefully confirmed using both simulation and measurements, confirming its capacity to detect lubricant evaporation with high sensitivity. With 0.1 MHz frequency shift in resonance frequency per 1 µL of lubricant, this sensor stands as a significant advancement in the field of medical implant technology, offering a real-time solution for ensuring the effectiveness of lubricant-infused coatings since their assessment is necessary to minimize complications associated with medical implants, such as the non-specific adhesion of blood components and bacteria.

关键词： Antenna measurements Sensitivity Lubricants Resonant frequency Implants Real-time systems Ultra wideband antennas

来源：评论

学校读者我要写书评

暂无评论

Modelling the development of biological structures displaying longitudinal geometries in vitro:culturing pluripotent stem cells on plasma-treated,growth factor-coupled polycaprolactone fibres

引用

Engineered Regeneration 2024年第1期5卷 124-138页

作者： Badwi B.Boumelhem Stuart T.Fraser Syamak Farajikhah Rachel A.Shparberg Michael B.Morris Marcela M.M.Bilek Anyu Zhang Behnam Akhavan Simon Fleming Maryanne Large School of Physics Faculty of ScienceUniversity of SydneyAustralia Sydney Nano Institute University of SydneyAustralia School of Chemical and Biomolecular Engineering University of SydneyAustralia School of Medical Sciences Faculty of Medicine and HealthUniversity of SydneyAustralia School of Biomedical Engineering Faculty of EngineeringUniversity of SydneyAustralia School of Engineering University of NewcastleCallaghanNSW 2308Australia Hunter Medical Research Institute(HMRI) Precision Medicine ProgramNew Lambton Heights NSW 2305Australia

Many biological structures such as nerves,blood and lymphatic vessels,and muscle fibres exhibit longitudinal ge-ometries with distinct cell types extending along both the length and width of internal linear *** these three-dimensional structures in vitro is challenging:the best-defined stem-cell differentiation systems are mono-layer cultures or organoids using pluripotent stem *** stem cells can differentiate into functionally mature cells depending on the signals received,holding great promise for regenerative ***,the integration of in vitro differentiated cell types into diseased tissue remains a *** scaffolds can bridge this gap if the appropriate signalling systems are incorporated into the ***,we have taken a biomimicry approach to generate longitudinal structures in *** this approach,mouse embryonic stem cells are directed to differentiate to specific cell types on the surface of polycaprolactone(PCL)fibres treated by plasma-immersion ion implantation and to which with lineage-specifying molecules have been covalently *** demonstrate the simplicity and utility of our method for efficiently generating high yields of the following cell types from these pluripotent stem cells:neurons,vascular endothelial cells,osteoclasts,adipocytes,and cells of the erythroid,myeloid,and lymphoid *** arranged plasma-treated scaffolds with differentiated cell types could ultimately serve as a means for the repair or treatment of diseased or damaged tissue.

关键词： Pluripotent stem cells Lineage commitment Growth factors Biomaterial engineering Plasma-immersion ion implantation Covalent biomolecule attachment Polycaprolactone

来源：评论

学校读者我要写书评

暂无评论

Inhibiting scar formation via wearable multilayer stacked electret patch:Self-creation of persistent and customizable DC electric field for fibrogenic activity restriction

引用

InfoMat 2024年第3期6卷 66-80页

作者： Sung-Won Kim Sumin Cho Donghan Lee Jiyu Hyun Sunmin Jang Inwoo Seo Hyun Su Park Hee Jae Hwang Hyung-Seop Han Dae Hyeok Yang Heung Jae Chun Suk Ho Bhang Dongwhi Choi School of Chemical Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Biomaterials Research Center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)SeoulRepublic of Korea Department of Medical Life Sciences College of MedicineInstitute of Cell and Tissue EngineeringThe Catholic University of KoreaSeoulRepublic of Korea

Electrical stimulation has recently received attention as noninvasive treatment in skin wound healing with its outstanding biological property for clinical ***,the complexity of equipment for applying appropriate electrical stimulation remains an ongoing ***,we proposed a strategy for skin scar inhibition by providing electrical stimulation via a multilayer stacked electret(MS-electret),which can generate direct current(DC)electric field(EF)without any power supply *** addition,the MS-electret can easily control the intensity of EFs by simply stacking electret layers and maintain stable EF with the surface potential of 3400 V over 5 days owing to the injected charges on the electret *** confirmed inhibition of type 1 collagen andα-SMA expression of human dermal fibroblasts(hDFs)by 90%and 44%in vitro,indicating that the transition of hDFs to myofibroblasts was restricted by applying stable electrical *** further revealed a 20%significant decrease in the ratio of myofibroblasts caused by the MS-electret in *** findings present that the MS-electret is an outstanding candidate for effective skin scar inhibition with a battery-free,physiological electrical microenvironment,and noninvasive treatment that allows it to prevent external infection.

关键词： DC electric field dermal fibroblasts electret scar formation restriction self-creation of electrical stimulation

来源：评论

学校读者我要写书评

暂无评论

Comparison of Advanced Sample Preparation Techniques for High-Resolution Imaging of Sponge Spicule Cross-Sections

Comparison of Advanced Sample Preparation Techniques for Hig...

引用

Symposium on Natural Fibers and Biocomposites: A Sustainable Solution, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： Tavangarian, Fariborz Fani, Niloofar Monfared, Armaghan Hashemi Sadeghzade, Sorour Mechanical Engineering Program School of Science Engineering and Technology Pennsylvania State University Harrisburg MiddletownPA17057 United States Department of Biomedical Engineering Pennsylvania State University State College University ParkPA16802 United States School of Engineering Westlake University Hangzhou310024 China

ISBN: (纸本)9783031811890

This study comprehensively investigates the effectiveness of three advanced sample preparation techniques—ion milling, laser cuttingLaser-based techniques, and Focused Ion Beam (FIB) milling—for high-resolution imaging of Euplectella aspergillum sponge fibers called spicules. Primarily composed of silica layers with nanometer-scale organic interlayers, spicules possess complex hierarchical structures which are critical for their mechanical propertiesMechanical property. Accurate characterizationCharacterization of these structures requires advanced sample preparation to prevent artefacts and preserve structural integrity. Ion milling introduced significant surface degradation and uneven material removal in spicules. Despite its precision, laser cutting caused thermal damage and induced micro-cracks, compromising the microstructural integrity. In contrast, FIB milling provided superior results, producing smooth, artefact-free cross-sections with minimal thermal and mechanical stress. The real-time imaging capability of FIB milling further ensured optimal sample preparation, making it the most suitable technique for delicate biological materials like spicules. The findings of this study provide valuable insights into the preparation of biological samples for further research and analysis. © The Minerals, Metals & Materials Society 2025.

关键词： Milling (machining)

来源：评论

学校读者我要写书评

暂无评论

Effect of High-Flow Nasal Cannula on Capnogram Waveform for Studying Non-Invasive Human Ventilation 2

Effect of High-Flow Nasal Cannula on Capnogram Waveform for ...

引用

2nd IEEE National biomedical engineering Conference, NBEC 2023

作者： Tirta Nindhia, Tjokorda Gde Aqila Mohammed, Nursyasa Jamaludin, Julia Jais Devandran, Pagupathi Angel Bhaswara, Nabiel Rafa Hutajulu, Thalitakum Malarvili, M.B. Udayana University Jimbaran Study Program of Mechanical Engineering Engineering Faculty Bali Indonesia Universiti Teknologi Malaysia School of Biomedical and Health Science Engineering Johor Malaysia

ISBN: (纸本)9798350338546

This study is conducted to compare three different cannulas;all purpose nasal cannula with 2 prongs, nasal pressure cannula with 2 prongs and single port nasal cannula which are commonly used for capnography device. These cannulas or sometimes called as nasal prong is connected to the device via nose of subjects studied. This procedure is a part of respiratory study to monitor lungs condition and breathing pattern. This study involves 47 subject where the exhaled breath was recorded to make comparison and choose the most suitable and effective for capnography waveform analysis. Utilizing Statistical Package for the Social Sciences (SPSS) to find the normality of all the nasal cannula data based on capnogram waveform. The result from the analysis shows that the frequency distribution for type 1 nasal cannula which is also known as all-purpose nasal cannula had the feature values closer to the standard value. Our study proofs that all purpose nasal cannula sampling is the most suitable to capture exhaled breath for monitoring respiratory conditions. © 2023 IEEE.

关键词： capnography CO2 monitoring, feature extraction nasal cannula

来源：评论

学校读者我要写书评

暂无评论

Degradation of Tattoo Inks by Cold Atmospheric Plasma Treatment: A Proof-of-Concept Study

引用

Plasma Medicine 2022年第3期12卷 1-21页

作者： Çukur, Elif Ercan, Utku Kürşat Department of Biomedical Engineering School of Engineering and Architecture İzmir Katip Çelebi University Çiğli İzmir35620 Turkey Isparta University of Applied Sciences Uluborlu Vocational School Biomedical Device Technologies Program Isparta32200 Turkey

Tattoos have been a part of the culture and a way of expression for a remarkable portion of society throughout history. However, different dissatisfactions related to tattoos lead people to tattoo removal procedures that can be carried out in various ways. Among them, laser tattoo removal is the most common technique. However, laser tattoo removal could have downsides;thus, novel technologies that either support or replace conventional methods are needed. In the present study, the degradation of red, yellow, green, blue, black and white tattoo inks by plasma treatment was evaluated for possible future use of cold plasma in tattoo removal. Tattoo inks were treated with DBD air plasma in the aqueous form and in the agarose gel. Furthermore, also tattoo pigments were exposed to plasma-treated water. The KI-starch reagent was used to correlate the oxidative strength of plasma-treated water with the degradation of tattoo inks. Degradation of tattoo inks was determined by reflectance measurements and was measured as color change with respect to plasma treatment time. Color changes of tattoo inks were represented using the CIELAB color system and CIE xyY color space. Our results suggest that air DBD plasma treatment and plasma-treated water are capable of degrading tattoo inks. The color change of tattoo inks due to degradation by plasma was clearly distinguishable by the naked eye, and the maximum value corresponding to color change was measured for red tattoo ink. © 2022 by Begell House, Inc.

关键词： Color

来源：评论

学校读者我要写书评

暂无评论

Control engineering investigation of the effects of proliferative diabetic retinopathy on the crystalline lens and ciliary muscle dynamic behavior

引用

Research on biomedical engineering 2023年第3期39卷 663-676页

作者： Oliveira, Rebeca Hannah de M. Silva, Mayla dos S. Nunes, Gustavo A. M. A. Faria, Rafael Mendes Santos, Kleriston Silva Rosa, Leandro L. F. Rosa, Mário F. F. Rosa, Suélia de S. R. F. Department of Biomedical Engineering Johns Hopkins University School of Medicine BaltimoreMD United States Postgraduate Program in Mechatronic Systems University of Brasília DF Brasilia Brazil Optometry Clinic GO Goiânia Brazil Biomedical Engineering Graduate Program University of Brasília DF Brasilia Brazil University of Brasilia – UnB DF Brasilia Brazil

Purpose: Proliferative diabetic retinopathy (PDR) affects more than 100 million adults worldwide and is one of the primary diseases leading to blindness and affecting the eye’s retina. Few papers mention its impact on the anterior segment of the eye. Methods: We present a novel bond graph model of the human eye calibrated with data from the literature to simulate the effects of retinopathy on lens behavior. Through mathematical representation in state space and transfer functions, we simulate the dynamic responses of the physiological and pathological systems. Results: The dynamic response to impulse inputs shows a distinct peak amplitude (0.01 difference) and transient time (0.0001 s) for PDR and Healthy systems at Region B (lens and ciliary muscle). Qualitative increase in ocular vasculature aggravation attenuates PDR dynamic response to unitary step input compared to Healthy (50% decay at 20 days of simulation) at Region B. Conclusions: The model suggests the potential impact of PDR on ciliary muscle behavior, which can have a clinical translation on diagnosis, follow-up, and treatment of the disease. It can be used for future studies on the effects of retinopathy on different ocular regions. © 2023, The Author(s), under exclusive licence to The Brazilian Society of biomedical engineering.

关键词： Eye protection

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：