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Journal of Donghua University(English Edition) 2013年第5期30卷 410-415页

作者： VARAN Nilufer Y king w martin Department of Textile Engineering Istanbul Technical University Textile Engineering Chemistry and Science North Carolina State University

In burn treatments,microorganisms on pressure garments during pressure therapy can prevent rehabilitation by causing functional,hygienic,and aesthetic difficulties. As bacterium is one of the most trouble-causing organisms,they can threaten patients causing infection during the long period of use of these *** burn pressure garments having durable antimicrobial property were developed using polyhexamethylene biguanide( PHMB)antimicrobial agent procedure on highly elastic nylon 66 /spandex fabrics in powernet,flat warp and weft knitted structures using paddry-cure method. Commercial wireless pressure sensors were used to control pressures at an acceptable medical range. Antimicrobial activity,wash durability,Fourier transform infrared spectroscopy(FTIR) and Scanning electron microscopy(SEM) analyses were conducted for the treated samples. Antimicrobial test results following AATCC 100 Test Method showed 99% reduction of bacteria for the fabric samples treated with PHMB. A small but significant decrease in antimicrobial activity was observed even after50 launderings. These treatments also yield good results to prevent odor,decrease infection by preventing and /or blocking microbial growth according to the antimicrobial mechanism and support reducing of scarring by providing a hygienic environment around the scar.

关键词： pressure garments burn hypertrophic scars antimicrobial polyhexamethylene biguanide(PHMB) wireless pressure sensors

Preparation and Mechanical Performance of Blended Polyester/Silk Small Diameter Arterial Prostheses

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Journal of Donghua University(English Edition) 2013年第5期30卷 356-358页

作者：杨小元王璐关国平关颖 king w martin Key Laboratory of Textile Science and Technology Ministry of EducationDonghua University College of Textiles Donghua University College of Textiles North Carolina State University

Small diameter arterial prostheses were required to treat coronary and cerebrovascular arterial diseases. The diameters of the artificial blood vessels should match the diameters of the host arteries. Besides,the mechanical properties of the arterial prostheses should be strong enough to endure the forces in the body after implantation. In this study,silk and polyester were woven into small diameter arterial prostheses and the dimensional and mechanical properties,as well as the water permeability,were investigated. The woven samples had an inner diameter ranging from 3. 65 to 3. 94mm. The wall thickness of the samples ranged from 0. 26 to 0. 28mm. Compared with polytetrafiuoroethylene( ePTFE) commercial devices,whose probe bursting strength was measured to be 15. 64 N /mm2,the woven samples had superior strength values ranging from20. 53 to 28. 97 N /mm2. In addition,the radial compliance of the woven samples was found to lie between the ePTFE sample and the pig's carotid artery,and the water permeability of all the woven samples was less than 300 mL /( cm2·min) which indicated that these woven samples could be implanted without preclotting.

关键词： silk polyester woven arterial prostheses mechanical properties

β-Chitin/Chitosan Obtained from Loligo and Humboldt Squids Effectiveness as wound Dressing Material

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Journal of Donghua University(English Edition) 2013年第5期30卷 406-409页

作者： JINDAN Rahim ZALAL Rahim HUDSON Samuel king w martin College of Textiles North Carolina State University College of Textiles Donghua University

A number of materials are utilized to develop wound care dressing materials with metallic treatments such as ionic silver and zinc. Metallic ions if used for a prolonged time may lead to toxicity. Alternatively chitin,a natural polysaccharide found in nature, is utilized. It is found in fungi, crabs, mushrooms,squids, octopus, and many other living organisms. Chitin has similar structure to cellulose but its deacetylated derivate chitosan has amine groups that provide potential antibacterial properties along with a number of other advantages. Chitin in its natural form is found in three different structural forms,namely α,β,and γ.The β-chitin and chitosan are mostly found in the exoskeleton of squids. Loligo and Humboldt squids were studied. It is anticipated that Humboldt chitin is more effective in serving as antibacterial material and can be utilized for wound care. Differences in steriochemical structure were observed among β-chitin structures obtained and amine group's presences were found along with ability of materials to swell.

关键词： β-chitin chitosan wound dressing material

Fabrication and Tissue Anchoring Performance of Nylon and Polypropylene Barbed Surgical Sutures

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Journal of Donghua University(English Edition) 2013年第5期30卷 391-393页

作者：丛慧 ROE Simon MENTE Peter RUFF Gregory king w martin College of Textiles North Carolina State University College of Veterinary Medicine North Carolina State University Department of Biomedical Engineering North Carolina State University Vilcom Circle Chapel Hill College of Textiles Donghua University

Barbed surgical sutures have attracted worldwide attention in recent years. The plurality of barbs projecting out and penetrating into surrounding tissue eliminates the need for tying a knot. In the current study,nylon and polypropylene( PP) barbed sutures with two different barb geometries designed to anchor in porcine skin and tendon tissues were fabricated by a specially designed mechanical cutting machine. The tensile properties were compared between the barbed and unbarbed control sutures. The in vitro tissue anchoring ability was measured by two tissue /suture pullout tests,one for skin and the other for tendon tissue. Regardless of the type of tissue,the PP barbed suture with its higher modulus had a superior anchoring ability. Given the same suture material,improved anchoring performance was shown in tendon tissue.

关键词： barbed surgical sutures nylon polypropylene(PP) barb configuration skin and tendon

Physical Characteristics of Knitted Polyester Vascular Prostheses:Can the wall Be Considered as a Scaffold for Tissue Regeneration?

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Journal of Donghua University(English Edition) 2010年第1期27卷 6-13页

作者：籍晓萍王璐赵荟菁姜华许琭 king martin w GUIDOIN Robert Key Laboratory of Textile Science & Technology Ministry of EducationDonghua University College of Textiles North Carolina State University Department of Surgery Laval Universityand Quebec Biomaterials InstituteCHUQ

Recent developments in endovascular surgery （EVAR） have opened new avenues to successfully treat aneurysms with percutaneous deployment of stent-grafts. Manufacturers have preferred to use woven fabrics or microporous tubes which are supported by metallic frames or stents. woven fabrics are much thinner than knits and this permits the use of a smaller delivery catheter. However, since woven constructions are stiffer and have little porosity, the tissue ingrowth is poor or absent. On the other hand, knitted constructions can be considered as a scaffold for tissue ingrowth, and hence they represent an attractive alternative because of their open structure and better conformability in the case of balloon deployment. The present study was undertaken to analyze the properties of two knitted and crimped polyester arterial prototype prostheses, one with and the other without a gelatin coating as sealant. Two commercial controls were also included in the study, namely the uncoated knitted polyester vascular prosthesis VP1200K, and its sealed version, the gelatin coated polyester knitted Gelsoft device, manufactured by Vascutek Ltd., Scotland, UK. In vitro testing consisted of analyzing the and marphology of the yam and fabric structures, and measuring the physical and mechanical properties of the grafts, including the water ***, the longitudinal and radial campliance, and the suture retention strength. In order to the different properties of the four samples, tests were performed on the gelatin coated of sealed devices before and after gelatin removal. The results provided a useful comparison between the prototypes and the commercial contorl devices. The latter used ten times the amount of gelatin which had been applied as a coating in order to achieve the same low level of impemeability to water. The different amounts of gelatin also explained the different mechanical performance, such as compliance, for these prototype and control prostheses

关键词： arterial prosthesis polyester knitted gelatin in vitro mechanical properties compliance

腔内隔绝术用人造血管移植物(SG)织物覆膜的疲劳性能研究

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中国生物医学工程学报 2009年第4期28卷 637-640,F0004页

作者：赵荟菁王璐李毓陵刘肖燕 king martin w 东华大学纺织学院纺织面料技术教育部重点实验室上海201620 北卡罗来纳州立大学纺织学院美国罗利27695

对腔内隔绝术用人造血管移植物(stent-graft(SG))的织物覆膜进行动态疲劳性能研究,分析影响其疲劳性能的因素。利用加速疲劳测试仪,对4种覆膜样品进行疲劳性能的测试。实验以覆膜承受的脉动次数为时间点,分别是0次、2.6×107次以及1×10... 详细信息

对腔内隔绝术用人造血管移植物(stent-graft(SG))的织物覆膜进行动态疲劳性能研究,分析影响其疲劳性能的因素。利用加速疲劳测试仪,对4种覆膜样品进行疲劳性能的测试。实验以覆膜承受的脉动次数为时间点,分别是0次、2.6×107次以及1×108次(即相当于植入体内0、10个月以及38.5个月)。选择覆膜试样的管径,织物周向和轴向密度以及水渗透性在疲劳试验前后的变化作为疲劳性能的特征指标,这些指标在疲劳试验前后都有不同程度的变化。脉动压力在织物覆膜周向的作用比在轴向的作用要大;织物覆膜在最初阶段疲劳表现明显,而后趋于稳定;组成织物覆膜的纱线越粗,其疲劳表现越明显;复丝织物的疲劳表现比单丝织物更明显。

关键词： SG织物覆膜疲劳性能纺织结构参数加速测试脉动

Tissue Holding Performance of Barbed Sutures

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Journal of Donghua University(English Edition) 2007年第2期24卷 213-218页

作者： INGLE Nilesh king martin Department of Textile & Apparel Technology & Management North Carolina State University

A new technology of knotless barbed surgical sutures has made its mark in cosmetic surgery around the world. Although this technology is still under development, it has been approved by the Federal Drug Administration in USA, and is now used for facelift and eyelid ptosis procedures. The objectives of this study were to review the different types of knotless sutures, assess the tissue holding capacity of barbed sutures and perform image analysis to better understand the mechanism of energy absorption by the barbs under loading by the forces of surrounding tissues. A two dimensional finite element analysis was also performed to identify the areas of stress concentration, which are the main precursors for the peeling of the barbs beyond the maximun tissue holding force for a particular polymer. It was found that barbed sutures exhibit tissue holding capacities comparable to that of knotted sutures. This technology needs to be investigated further so as to optimize the barb geometry for superior holding capacity in a variety of different tissues.

关键词： barb suture surgical finite element analysis image analysis

Recent Ventures in Interdisciplinary Arctic Research:The ARCPATH Project

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Advances in Atmospheric Sciences 2024年第8期41卷 1559-1568页

作者： Astrid E.J.OGILVIE Leslie A.king Noel KEENLYSIDE François COUNILLON Brynhildur DAVIÐSDÓTTIR Níels EINARSSON Sergey GULEV Ke FAN Torben KOENIGK James R.MCGOODwIN Marianne H.RASMUSSON Shuting YANG Institute of Arctic and Alpine Research(INSTAAR) University of ColoradoBoulder CO 80303USA Stefansson Arctic Institute AkureyriÍS-600Iceland Royal Roads University BC V9B 5Y2Canada University of Bergen Bergen N-5007Norway Nansen Environmental and Remote Sensing Centre Bergen N-5007Norway University of Iceland Reykjavík 102Iceland Shirshov Institute of Oceanology Moscow 117218Russia Moscow State University Moscow 11991Russia Chinese Academy of Sciences Beijing 100045China Swedish Meteorological and Hydrological Institute SE-60176 NorrköpingSweden Danish Meteorological Institute CopenhagenØ2100Denmark Obukhov Institute of Atmospheric Physics RAS119017MoscowRussia

This paper celebrates Professor Yongqi GAO's significant achievement in the field of interdisciplinary studies within the context of his final research project Arctic Climate Predictions: Pathways to Resilient Sustainable Societies-ARCPATH(https://***/en/projects/finished-projects/arcpath). The disciplines represented in the project are related to climatology, anthropology, marine biology, economics, and the broad spectrum of social-ecological studies. Team members were drawn from the Nordic countries, Russia, China, the United States, and Canada. The project was transdisciplinary as well as interdisciplinary as it included collaboration with local knowledge holders. ARCPATH made significant contributions to Arctic research through an improved understanding of the mechanisms that drive climate variability in the Arctic. In tandem with this research, a combination of historical investigations and social, economic, and marine biological fieldwork was carried out for the project study areas of Iceland, Greenland, Norway, and the surrounding seas, with a focus on the joint use of ocean and sea-ice data as well as social-ecological drivers. ARCPATH was able to provide an improved framework for predicting the near-term variation of Arctic climate on spatial scales relevant to society, as well as evaluating possible related changes in socioeconomic realms. In summary, through the integration of information from several different disciplines and research approaches, ARCPATH served to create new and valuable knowledge on crucial issues, thus providing new pathways to action for Arctic communities.

关键词： Recent Ventures in Interdisciplinary Arctic Research:The ARCPATH Project

Ce掺杂浓度对Ce,Ca:Lu_(3)Al_(5)O_(12)陶瓷闪烁性能的影响

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硅酸盐学报 2024年第3期52卷 755-764页

作者：朱丹阳蔡金伶 BEITLEROVA Alena KUCERKOVA Romana CHEwPRADITKUL weerapong NIKL martin 李江中国科学院上海硅酸盐研究所上海201899 中国科学院大学北京100049 上海大学上海200072 捷克科学院物理研究所捷克布拉格16200 泰国国王科技大学泰国曼谷10140

以共沉淀纳米粉体为原料,制备不同Ce掺杂浓度的x%(摩尔分数)Ce,0.15%Ca:Lu_(3)Al_(5)O_(12)(Ce,Ca:LuAG,x=0.1~0.5)闪烁陶瓷。在分析了Ce,Ca:Lu AG陶瓷的相组成和微观结构的基础上,研究了其闪烁特性与Ce浓度的关系,包括X射线激发发射光... 详细信息

以共沉淀纳米粉体为原料,制备不同Ce掺杂浓度的x%(摩尔分数)Ce,0.15%Ca:Lu_(3)Al_(5)O_(12)(Ce,Ca:LuAG,x=0.1~0.5)闪烁陶瓷。在分析了Ce,Ca:Lu AG陶瓷的相组成和微观结构的基础上,研究了其闪烁特性与Ce浓度的关系,包括X射线激发发射光谱、光致发光衰减、闪烁衰减、光产额及快分量、余辉。当Ce浓度超过0.3%时,光致发光衰减的加速证实了浓度猝灭的发生。Ce,Ca:LuAG陶瓷的X射线激发发射强度和光产额在Ce浓度为0.3%时达到最大值。随着Ce浓度的增加,陶瓷的余辉水平逐渐降低。最后讨论了Ce,Ca:LuAG闪烁陶瓷的制备和性能优化的策略。

关键词：铈钙镥铝石榴石陶瓷闪烁性能共沉淀法

Effect of PLA Knitted Structure on the Mechanical Properties of Composite Vascular Scaffold

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Journal of Donghua University(English Edition) 2014年第5期31卷 659-663页

作者： LI Chao-jing LI Xuan wANG Fu-jun GE Peng MAO Ying wANG Lu martin w. king Key Laboratory of Textile Science and Technology Ministry of Education Donghua University Shanghai 201620 China College of Textiles North Carolina State University Raleigh 27695 USA

A new entire biodegradable scaffold has been developed which does not require precellularization before *** new kind of vascular scaffold prototype made from porous poly-ε-caprolactone( PCL) membrane to provide three-dimensional environment for cell growth, and embedded with weft-knitted polylactic acid( PLA) fabric to support *** aim of this paper is to study the variation tendency of mechanical properties with the fabric spacing *** basic geometrical parameters were measured to characterize properties of the *** tensile and compressive elastic recovery of the samples were tested by the universal mechanical tester and radial compression apparatus,*** tensile and compressive properties enhanced when reducing the fabric spacing of the composite vascular scaffold.

关键词： vascular scaffold polylactic acid(PLA) poly-εcaprolactone(PCL) knitted fabric composite structure mechanical properties