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Efficacy of spray flushing in the reprocessing of flexible endoscopes:A randomized controlled trial

World Journal of Gastroenterology 2024年第31期30卷 3680-3688页

作者： Jiang Du Miao Zhang Si-Yuan Tao Lian-Song Ye Hui Gong Bing Hu Qiong-Ying Zhang Fu Qiao Department of Gastroenterology and Hepatology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina West China School of Nursing Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Infection Control West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Digestive Endoscopy Medical Engineering Research Laboratory West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Commonly used cleaning brushes in the reprocessing of flexible endoscopes often cause damage within the working *** To develop a spray flushing system to achieving effective cleaning of the working channels while minimizing *** This prospective study included 60 used endoscopes and 60 Teflon tubes randomly divided into a control group(n=30)and an experimental group(n=30).The material of Teflon tubes was the same as that of the endoscope working *** in the control group were manually cleaned using traditional cleaning brushes,while those in the experimental group were cleaned using the newly developed spray flushing *** levels,cleanliness,and microbiological testing of the working channels were ***,Teflon tubes in the control group underwent 500 passes with a cleaning brush,while those in the experimental group were subjected to the spray flushing system,and channel damage was *** The ATP levels(RLU)in the two groups were 32.5(13-66)and 26(16-40),respectively(P>0.05).Cleanliness scores were 1.5(1-2)and 1(1-2),respectively(P>0.05).Debris was found in 73.3%of the control group,which was significantly higher than 46.7%in the experimental group(P<0.05).Microbiological tests for both groups yielded negative *** tube damage in the control group was rated at 4(4-5.25),which was significantly higher than in the experimental group 4(3-4)(P<0.01).CONCLUSION The spray flushing system demonstrated superior efficacy in removing debris and resulted in less damage to the endoscope working channels compared with traditional cleaning brushes.

关键词： Endoscope ATP Flexible endoscope Disinfection reprocessing

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A Q-Learning Based Hybrid Meta-Heuristic for Integrated Scheduling of Disassembly and reprocessing Processes Considering Product Structures and Stochasticity

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Complex System Modeling and Simulation 2024年第2期4卷 184-209页

作者： Fuquan Wang Yaping Fu Kaizhou Gao Yaoxin Wu Song Gao the School of Business Qingdao UniversityQingdao 266071China the Macao Institute of Systems Engineering Macao University of Science and TechnologyMacao 999078China the Department of Industrial Engineering&Innovation Sciences Eindhoven University of TechnologyEindhoven5600 MBthe Netherlands the College of Information Science and Engineering Northeastern UniversityShenyang 110819China

Remanufacturing is regarded as a sustainable manufacturing paradigm of energy conservation and environment *** improve the efficiency of the remanufacturing process,this work investigates an integrated scheduling problem for disassembly and reprocessing in a remanufacturing process,where product structures and uncertainty are taken into ***,a stochastic programming model is developed to minimize the maximum completion time(makespan).Second,a Q-learning based hybrid meta-heuristic(Q-HMH)is specially *** each iteration,a Q-learning method is employed to adaptively choose a premium algorithm from four candidate ones,including genetic algorithm(GA),artificial bee colony(ABC),shuffled frog-leaping algorithm(SFLA),and simulated annealing(SA)*** last,simulation experiments are carried out by using sixteen instances with different scales,and three state-of-the-art algorithms in literature and an exact solver CPLEX are chosen for *** analyzing the results with the average relative percentage deviation(RPD)metric,we find that Q-HMH outperforms its rivals by 9.79%-26.76%.The results and comparisons verify the excellent competitiveness of Q-HMH for solving the concerned problems.

关键词： remanufacturing scheduling disassembly reprocessing meta-heuristic Q-learning

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Synthesis of Lignin-based Nonisocyanate Poly(imine-hydroxyurethane)s *** II:Self-healing,reprocessing,and Degradation

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Paper And Biomaterials 2021年第3期6卷 1-9页

作者： Chao Shen Bailiang Xue Danwei Xue Rui Tang Wei Zhao Xinping Li College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi'anShaanxi Province710021China Key Laboratory of Pulp and Paper Science&Technology of Ministry of Education Qilu University of Technology(Shandong Academy of Sciences)Ji'nanShandong Provice250353China

This study provides a comprehensive understanding of the polymeric properties of lignin-based non-isocyanate poly(iminehydroxyurethane)s(LNIPUs).The properties of the LNIPUs are affected by changes in the stoichiometric feed ratios of the bis(6-membered cyclic carbonate)(BCC)and levulinate enzymatic hydrolysis lignin(LEHL).The results showed that the LNIPUs exhibited a short relaxation time and excellent thermal repair and degradation *** a change in the LEHL content in the LNIPUs to 45.53%,a relaxation time of only 9 s was achieved,and the thermal repair rate of the scratches reached 93%.Furthermore,the tensile strength of the LNIPUs decreased with an increase in the LEHL content after two hot-pressing processes,while a higher than 75% tensile strength was maintained after the second hot-pressing *** LNIPUs exhibited thermoresponsive shape memory property with deformation and shape fixing at 80℃.In addition,the as-synthesized LNIPUs were soluble in ethylene glycol in the absence of any organic *** work demonstrates the synthesis of LNIPUs with self-healing,reprocessing,shape memory,and degradation properties.

关键词： lignin non-isocyanate polyurethane self-healing reprocessing

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Current issues in endoscope reprocessing and infection control during gastrointestinal endoscopy

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World Journal of Gastroenterology 2006年第25期12卷 3953-3964页

作者： Douglas B Nelson Lawrence F Muscarella Staff Physician in Gastroenterology Minneapolis VA Medical Center University of MinnesotaMinneapolisMN 55417United States Director Research and Development ChiefInfection ControlCustom UltrasonicsInc

The purpose of this article is to review the evidence regarding transmission of infection during gastrointestinal endoscopy, factors important in endoscope reprocessing and infection control, areas to focus on to impr... 详细信息

关键词： Endoscopy Infection Disinfection reprocessing Infection control

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PARC Process for reprocessing Spent Fuels from Advonced Nuclear Reactors

PARC Process for Reprocessing Spent Fuels from Advonced Nucl...

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第13届太平洋地区核能大会

作者： Gunzo Uchiyama Hideaki Mineo Toshihide Asakura Shinobu Hotoku Process Safety Laboratory Department of Fuel Cycle Safety Research Japan Atomic Energy Research Institute Tokai-mura Naka-gun Ibaraki-ken 319-1195 Japan Process Safety Laboratory Department of Fuel Cycle Safety Research Japan Atomic Energy Research Institute Tokai-mura Naka-gun Ibaraki-ken 319-1195 Japan Process Safety Laboratory Department of Fuel Cycle Safety Research Japan Atomic Energy Research Institute Tokai-mura Naka-gun Ibaraki-ken 319-1195 Japan Process Safety Laboratory Department of Fuel Cycle Safety Research Japan Atomic Energy Research Institute Tokai-mura Naka-gun Ibaraki-ken 319-1195 Japan

＜正e PARC process concept is being developed in JAERI, as a key technology ofnext generation’s fuel recycling

关键词： reprocessing PUREX process Single-cycle process Long-lived nuclide Reduced-moderation water rector PARC process Separation

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Investigation on UV-curing Reprocessable Thermosets Bearing Hindered Urea Bonds and Their Composites with Modified Zinc Oxide Nanoparticles

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Chinese Journal of Polymer Science 2024年第6期42卷 751-765页

作者： Jun-Hao Zhou Li-Ming Tang Key Laboratory of Advanced Materials of Ministry of Education of China Department of Chemical EngineeringTsinghua UniversityBeijing100084China

In this study,a series of hindered urea bond(HUB)containing polyurethane-urea methacrylate prepolymers and a none HUB containing polyurethane methacrylate prepolymer were prepared using isobornyl methacrylate as the reactive diluent via one-pot *** prepolymers were characterized fully by various ***,their thermosets were fabricated via UV curing in presence of a photo initiator,and their mechanical property and thermal behavior were investigated and *** from the none HUB containing thermoset,the HUB containing thermosets(defined as PUT)could be recycled and reprocessed by hot press under relatively mild conditions with high recovery ratio of mechanical ***,zinc oxide(ZnO)nanoparticles were modified with 3-(trimethoxysilyl)propyl methacrylate and the modified ZnO(defined as ZnO-TPM)was dispersed and polymerized into PUT matrix to prepare their *** influence of ZnO-TPM on the mechanical performance of the composites was evaluated,which indicated that the Young’s modulus and tensile strength increased gradually to the maximum values at ZnO-TPM content of 1 wt%and then *** composites also displayed good reprocessability with improved recovery ratio compared to the pure PUT *** addition,the composite materials exhibited strong UV absorption capacity,implying their potential application in the circumstance where UV-shielding was required.

关键词： Polyurethane-urea methacrylate Hindered urea bond ZnO nanoparticles reprocessing UV curing

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Catalyst-free and Reprocessable Aromatic Polydithiourethanes

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Chinese Journal of Polymer Science 2024年第10期42卷 1435-1441,I0007页

作者： Bo Yang Hai-Jun Feng Tian-Tian Ni Xiao-Rui Zhou Tao Xie Ning Zheng State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310058China Department of Colorectal Surgery and Oncology Key Laboratory of Cancer Prevention and InterventionMinistry of EducationThe Second Affiliated HospitalZhejiang University School of MedicineHangzhou310009China

The incorporation of dynamic covalent bonds into thermosets facilitates the reprocessing of polymer networks,thereby meeting the sustainable requirements for polymer ***,the mechanical properties of many materials often decline significantly upon reprocessing due to side reactions caused by harsh processing *** this work,we find that the aromatic dithiocarbamate bond can undergo dissociation under mild conditions without the need for a catalyst,enabling the efficient reprocessing of the corresponding *** a consequence,the mechanical properties of the polydithiourethane can be largely preserved after *** discovery of this dynamic chemistry is anticipated to broaden the potential for material design in dynamic covalent polymer networks.

关键词： reprocessing Polydithiourethane Dynamic covalent bond

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Effect of an antioxidant on the life cycle of wood flour/polypropylene composites

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Journal of Forestry Research 2020年第4期31卷 1435-1443页

作者： Haigang Wang Jingfa Zhang Haitao Fu Weihong Wang Qingwen Wang Key Laboratory of Bio-Based Material Science and Technology(Ministry of Education) Northeast Forestry UniversityHarbin 150040People’s Republic of China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642People’s Republic of China

This study assessed the life cycle of biocomposites with antioxidants by repeated *** effects of antioxidants on the life cycle of wood flour/polypropylene(PP)composites were determined by analyzing their mechanical and thermal *** composites were repeatedly processed for seven times with pelletizing and *** antioxidant,pentaerythritoltetrakys 3-(3,5-ditert-butyl-4-hydroxyphenyl)propionate,was *** mechanical strength of the biocomposites decreased after *** transformed infrared analysis showed that thermo-oxidative aging occurred during *** thermal performance of the resulting composites decreased because of *** flour/PP has a long lifetime and antioxidants can slow the thermo-oxidative and mechanical degradation during reprocessing.

关键词： Wood-plastic composites Polypropylene reprocessing Antioxidant

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Suitability of Blends from Virgin and Reprocessed Polylactide: Performance and Energy Valorization Kinet

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Journal of Renewable Materials 2018年第4期6卷 370-382页

作者： O.Gil-Castell J.D.Badia A.Ribes-Greus Instituto de Tecnología de Materiales(ITM) Universitat Politècnica de ValènciaCamino de Vera s/n46022 ValènciaSpain Departament d’Enginyeria Química Escola Tècnica Superior d’EnginyeriaUniversitat de ValènciaAv.de la Universitat s/n46100 BurjassotSpain

A blending strategy of virgin and reprocessed polylactide may be postulated as an alternative to reduce the material cost at industrial level,and as a valorization route to plastic waste management of production *** performance of blends prepared from virgin polylactide and polylactide mechanically reprocessed up to two cycles(PLA-V/R)was assessed in terms of thermo-oxidative stability,morphology,viscoelasticity and thermal kinetics for energetic ***-V/R blends showed appropriate thermo-oxidative *** amorphous nature of polylactide was preserved after *** viscoelastic properties showed an increment of the mechanical blend effectiveness,which suggested the feasibility of using PLA-V/R blends under similar mechanical conditions to those of virgin PLA ***,it was shown that the energetic valorization of PLA-V/R blends would result in a more feasible process,due to the lower required activation energy,thus highlighting the advantages of the energetic demand for the *** conclusion,PLA-V/R blends showed similar processability,service performance and valorization routes as virgin PLA and therefore could be relevant in the sustainable circular industry of bioplastics.

关键词： Polylactide (PLA) mechanical recycling reprocessing energetic valorisation thermal analysis

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Future Resources for Eco-building Materials:I. Metallurgical Slag

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Journal of Wuhan University of Technology(Materials Science) 2009年第3期24卷 451-456页

作者：徐德龙 State Key Lab of Western Architecture & Technology (Cultivating Base) Xi’an University of Architecture and Technology Institute of Powder Engineering School of Materials Science and Engineering Xi’an University of Architecture and Technology

In order to make an effectivily recycle use of iron and steel slags that are main industrial wastes generated in Chinese metallurgical industry, the current technologies for reprocessing and recycling these wastes into eco-building materials were reviewed, such as preparing cement-steel slag blended cement with steel slag after metal recovery, using the fine powder of blast furnace slag （BFS） for manufacturing slag cement and high performance concrete. A further research on using these available resources more efficiently were discussed.

关键词： metallurgical slag reprocessing eco-building materials

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