检索结果-内蒙古大学图书馆

NanoSpotTMcollector for aerosol sample collection for direct microscopy and spectroscopy analysis

Aerosol science and Technology 2023年第4期57卷 342-354页

作者： Orthodoxia Zervaki Braden Stump Patricia Keady Dionysios D. Dionysiou Pramod Kulkarni a Centers for Disease Control and Prevention National Institute for Occupational Safety and Health Cincinnati Ohio USAb Environmental Engineering and Science Program Department of Chemical and Environmental Engineering (ChEE) University of Cincinnati Cincinnati Ohio USA c Aerosol Devices Inc Fort Collins Colorado USA b Environmental Engineering and Science Program Department of Chemical and Environmental Engineering (ChEE) University of Cincinnati Cincinnati Ohio USA a Centers for Disease Control and Prevention National Institute for Occupational Safety and Health Cincinnati Ohio USA

We describe design and characterization of an aerosol NanoSpotTMcollector, designed for collection of airborne particles on a microscopy substrate for direct electron and optical microscopy, and laser spectroscopy analysis. The collector implements a water-based, laminar-flow, condensation growth technique, followed by impaction onto an optical/electron microscopy substrate or a transmission electron microscopy grid for direct analysis. The compact design employs three parallel growth tubes allowing a sampling flow rate of 1.2 L min−1. Each growth tube consists of three-temperature regions, for controlling the vapor saturation profile and exit dew point. Following the droplet growth, the three streams merge into one flow and a converging nozzle enhances focusing of grown droplets into a tight beam, prior to their final impaction on the warm surface of the collection substrate. Experiments were conducted for the acquisition of the size-dependent collection efficiency and the aerosol concentration effect on the NanoSpotTMcollector. Particles as small as 7 nm were activated and collected on the electron microscopy stub. The collected particle samples were analyzed using electron microscopy and Raman spectroscopy for the acquisition of the particle spatial distribution, the spot sample uniformity, and the analyte concentration. A spot deposit of approximately 0.7-mm diameter is formed for particles over a broad particle diameter range, for effective coupling with microscopic and spectroscopic analysis. Finally, the NanoSpotTMcollector’s analytical measurement sensitivity for laser Raman analysis and counting statistics for fiber count measurement using optical microscopy were calculated and were compared with those of the conventional aerosol sampling *** © 2023 American Association for Aerosol Research

关键词： Jingkun Jiang

来源：评论

学校读者我要写书评

暂无评论

Macroencapsulation Devices for Cell Therapy

引用

engineering 2022年第6期8卷 53-70页

作者： Wei Liu Yanfang Wang Jinqiang Wang Olivia LLanier Marissa EWechsler Nicholas A.Peppas Zhen Gu Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China Department of General Surgery Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou 310016China Department of Biomedical Engineering The University of Texas at AustinAustinTX 78712USA Department of Biomedical Engineering and Chemical Engineering The University of Texas at San AntonioSan AntonioTX 78249USA Division of Molecular Pharmaceutics and Drug Delivery College of PharmacyThe University of Texas at AustinAustinTX 78712USA Zhejiang Laboratory of Systems and Precision Medicine Zhejiang University Medical CenterHangzhou 311121China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Macroencapsulation has been widely used in cell therapy due to its capability to provide immune-privileged sites for implanted allogeneic or xenogeneic *** also serves to provide mechanical and physiochemical support for maintaining cell expansion and promoting therapeutic *** devices such as membrane-controlled release systems,hydrogels,micronee-dle(MN)array patches,and three-dimensional(3D)stents have shown promising in-lab and preclinical results in the maintenance of long-term cell survival and the strengthening of treatment *** studies focus on expanding the applications of these devices to new cell-based areas such as chimeric antigen receptor(CAR)-T cell delivery,cardiovascular disease therapy,and the exploration of new materials,construction methods,and working principles to augment treatment efficacy and prolong therapy ***,we survey innovative platforms and approaches,as well as translation outcomes,for advancing the performance and applications of macrodevices for cell-based therapies.A discussion and critique regarding future opportunities and challenges is also provided.

关键词： Drug delivery Cell encapsulation Cell therapy Cell transplantation Biomedical devices

来源：评论

学校读者我要写书评

暂无评论

An intelligent light-managing ionic skin for UV-protection,IR stealth,and optical camouflaged Morse codes

引用

science China Materials 2022年第8期65卷 2281-2288页

作者： Xiaofang Shi Zhouyue Lei Peiyi Wu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of ChemistryChemical Engineering and BiotechnologyCenter for Advanced Low-Dimension MaterialsDonghua UniversityShanghai 201620China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA02138USA State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China

Ionic skins that demonstrate great advantages in the mechanical properties and multiple sensory capabilities are regarded as an attractive candidate to mimic functions of human ***,human skin is vulnerable to be damaged under long-time sunlight irradiation,and most of the current ionic skins also lack a protection against harmful ultraviolet and infrared ***,this work develops a multifunctional ionic skin based on ionic conductive and light-managing hydrogels via a facile one-step locally confined *** is mechanically adaptable,able to modulate light in the broadband solar spectrum,and protect human skin from the harmful ultraviolet and infrared ***,without complicated processing,the ionic skin enables human-machine interactions via wireless and optical camouflaged Morse *** believe this work will promote the development of smart wearable devices with multiple customizable functions.

关键词： ionic skins hydrogels light-managing human-machine interfaces

来源：评论

学校读者我要写书评

暂无评论

Preparation of Pva/Cnts Film with High Humidity-Sensitive Performance Based on Multi-Process

SSRN

引用

SSRN 2024年

作者： Du, Miao Ni, Qingsheng Zhang, Dezhi Shan, Guorong Zheng, Qiang State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou310027 China Institute of Zhejiang University-Quzhou Quzhou324000 China Hangzhou Applied Acoustics Research Institute Hangzhou310023 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030000 China

PVA (polyvinyl alcohol) is a common water-soluble polymer with a large number of hydroxyl groups on the side chain, which makes it hydrophilic. In this paper, a humidity-sensitive PVA film with high stability and a short equilibrium time was prepared by multimethod integration, i.e., crosslinking, foaming, spin coating and hydroxylated carbon nanotubes (CNTs) addition. The effects of crosslinking structure, pore structure, spin coating speed and CNTs content ( ) on humidity-sensitive performance were investigated in detail. The crosslinking of PVA chains enhances the stability under cyclic test conditions. The addition of a foaming agent can generate a pore structure to increase the water vapor exchange efficiency of the film in contact with the external environment, which improves the humidity response and recovery performance. The spin coating speed significantly influences the pore structure and thickness of the prepared films. CNTs promote the adsorption of water molecules in air through their high specific surface area and facilitate the dissociation of water through hole carriers and hydroxyl groups, which reduces the resistance of PVA/CNTs films and enlarges their humidity response range. The content of CNTs has a significant impact on the humidity-sensitive performance of the film by changing the viscosity of the precursor solution. The matching of spin coating speed and determines the final foaming structure and film thickness. By integrating multiple methods, we obtained a polymer-based humidity-sensitive film with an optimal pore structure and film thickness and, accordingly, outstanding humidity-sensitive performances, i.e., high stability and short response and equilibrium time. © 2024, The Authors. All rights reserved.

关键词： Carbon nanotubes

来源：评论

学校读者我要写书评

暂无评论

DROPLET DIGITAL IMMUNO-PCR FOR PROFILING PROTEIN-SPECIFIC EXTRACELLULAR VESICLES 26

DROPLET DIGITAL IMMUNO-PCR FOR PROFILING PROTEIN-SPECIFIC EX...

引用

26th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2022

作者： Lix, Chxnchen Lin, Hxixian Yao, Shxhxai Department of Laboratory Medicine Nanfang Hospital Southern Medical University Guangzhou China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Bioengineering Graduate Program Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

ISBN: (纸本)9781733419048

We construct a versatile droplet digital immuno-PCR ddiPCR assay which integrates immuno-PCR and droplet digital PCR ddPCR for quantifying protein-specific extracellular vesicle EV subpopulations at the single-vesicle level. We applied the ddiPCR assays for profiling the EV proteins of CD/CD63/CD81, HER2, EpCAM in a breast cancer cohort. The results demonstrated that the counting of multi-subpopulation EVs could significantly distinguish patients with breast tumor at different stages or hepatocellular carcinoma from healthy controls. This study provides a promising strategy to count multi-subpopulation EVs at the single-vesicle level for cancer diagnosis. © 2022 MicroTAS 2022 - 26th International Conference on Miniaturized Systems for Chemistry and Life sciences. All rights reserved.

关键词： Drops

来源：评论

学校读者我要写书评

暂无评论

Bibliometric Analysis of Trends and Directions in Machine Learning Applied to FinTech

Bibliometric Analysis of Trends and Directions in Machine Le...

引用

Electronic and Electrical engineering and Intelligent System (ICE3IS), International Conference on

作者： Erman Arif Suherman Suherman Aris Puji Widodo Doctoral Program of Information System School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia Department of Informatics Faculty of Science and Mathematics Diponegoro University Semarang Indonesia

ISBN: (数字)9798350378368

ISBN: (纸本)9798350378375

Our article presents a comprehensive analysis of trends and directions in the application of machine learning in the FinTech sector. By utilizing data from academic databases such as Scopus, our objective is to showcase the advancements in this interdisciplinary research area. The study identifies key trends, influential authors, leading journals, and significant collaborative networks that shape the field. The methodology employed involves quantitative bibliometric analysis to evaluate publications from the past five years. The results indicate a substantial increase in the number of studies during this period, highlighting the importance of machine learning in addressing critical financial challenges, including fraud detection, algorithmic trading, credit scoring, and risk management. Additionally, we delve into the main themes, countries, and institutions that dominate the current research agenda. This analysis provides valuable insights into the present state and future direction of machine learning in FinTech, serving as a resource for researchers and practitioners seeking to comprehend and contribute to this dynamic and rapidly evolving field. We also discuss implications for future research, emphasizing the necessity for continuous innovation and interdisciplinary collaboration to maximize the potential of machine learning in transforming financial services.

关键词： Symbiosis Technological innovation Machine learning algorithms Bibliometrics Collaboration Machine learning Market research Dynamic scheduling Fraud Risk management

来源：评论

学校读者我要写书评

暂无评论

Learn How to Design High-Quality Qualitative Educational Research! - A Workshop for Disciplinary STEM Faculty by Disciplinary STEM Faculty 53

Learn How to Design High-Quality Qualitative Educational Res...

引用

53rd IEEE ASEE Frontiers in Education International Conference, FIE 2023

作者： Morelock, John R. Jarvie-Eggart, Michelle Chenette, Heather Hooshangi, Sara Chestnutt, Betsy Wilson, Sarah Bolhari, Azadeh Dodson, Kirsten Pavlova, Iglika Reck, Rebecca Transformations Institute University of Georgia Engineering Education AthensGA United States Michigan Technological University Engineering Fundamentals HoughtonMI United States Rose-Hulman Institute of Technology Chemical Engineering Terre HauteIN United States Virginia Tech Computer Science - Northern Virginia Center WashingtonDC United States University of Tennessee Knoxville Engineering Fundamentals KnoxvilleTN United States University of Kentucky Chemical Engineering LexingtonKY United States University of Colorado Boulder Environmental Engineering Program BoulderCO United States Lipscomb University Mechanical Engineering NashvilleTN United States University of North Carolina Greensboro Department of Biology GreensboroNC United States University of Illinois Urbana-Champaign Bioengineering ChampaignIL United States

ISBN: (纸本)9798350336429

The purpose of this workshop-designed for instructional and disciplinary STEM faculty interested in learning about qualitative research-is to (1) introduce participants to high-quality qualitative research design and (2) practice this design process alongside disciplinary STEM faculty to expand their STEM education research abilities and network. We will do so using the ProQual approach, a methodologically unencumbered and widely accessible way of thinking about qualitative research design that was deployed and refined over the last three years as part of the NSF-funded ProQual Institute for Research Methods [1]. This workshop will be conducted by ProQual Institute alumni, who are culturally sensitive to the challenges faced by disciplinary STEM faculty. Leveraging a propagation model of effecting academic change [2], the workshop leaders will serve as a community of practice to help participants move their educational research ideas forward during and after the workshop. In doing so, we strive to further FIE's mission to create a collaborative, supportive, and inclusive community of educational researchers. © 2023 IEEE.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The Influence of Rheology on Smooth Rod Coating Systems

The Influence of Rheology on Smooth Rod Coating Systems

引用

TAPPICon Conference 2022, TAPPICon 2022

作者： Roper, John Bousfield, Doug Welsch, Gregory Paper Surface Science Program Department of Chemical and Biomedical Engineering University of Maine OronoME04469-5737 United States Latex Binders Trinseo LLC MidlandMI48640 United States

Rod coating methods are of interest for the potential application of barrier coatings on paper in post-processing facilities that may run at moderate speeds and narrow widths. Difficulties are observed at low speeds to obtain good coat weight control because of poor hydrodynamic loading of the rod. While there is literature available about rod coating with a focus on ribbing instabilities and parameters linked to other defects, there seems to be less reported on the rod loading of smooth rods to obtain various coat weights. Also, much of the prior work is related to rod coating onto rubber transfer rolls at high speeds associated with the metered size press. Here, a simplified model is given, neglecting some complex features of rubber deformation and film split, to estimate the influence of the process parameters such as speed, rod diameter, viscosity and rod loading on the coat weight obtained. As found in practice, at low speed and low viscosities, the coat weight-load curve is steep, leading to poor control of the coat weight and coat weight uniformity. If the viscosity is increased, the curve is modified, and control is possible with rod loading in a normal range. For shear thinning fluids described by the Carreau model, the power law index and other parameters need to be in the correct range to obtain the desired effect. Modeling predictions show a steeper dependence of coat weight with rod pressure when compared to pilot coater data. Future modeling work will incorporate additional features such as rubber deformation and filtercake formation as ways to better match experimental results. © TAPPICon Conference 2022, TAPPICon 2022. All rights reserved

关键词： Loading

来源：评论

学校读者我要写书评

暂无评论

Initial Exploration and Understanding of Parameters for Successful Enterprise Architecture Implementation

Initial Exploration and Understanding of Parameters for Succ...

引用

International Conference on ICT For Smart Society (ICISS)

作者： Dyna Marisa Khairina Purwanto Purwanto Dinar Mutiara Kusumo Nugraheni Doctoral Program in Information Systems School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia Department of Informatics Faculty of Science and Mathematics Universitas Diponegoro Semarang Indonesia

ISBN: (数字)9798350389654

ISBN: (纸本)9798350389661

This study provides an initial exploration and further understanding of the factors that are parameters in evaluating the success of Enterprise Architecture (EA) implementation. An evaluation process is needed to ensure that the EA project implementation provides effectiveness, efficiency, and feasibility of the EA information system as well as assessing previous project experience to avoid future EA project risks. The research aims to present a Systematic Literature Review based on the stages of identification, screening, eligibility, and inclusion so that 14 main articles are selected for review with strong actual relevance. The study results provide insights and references that can be used to further explore key factors in evaluating the success of EA implementation in the future. It was found that there were ten factors that most influenced the evaluation of the success of EA implementation and it was concluded that two potential factors were the most influential and required further exploration in evaluating the success of EA implementation which could be applied in various sectors/dimensions. This study contributes as an initial reference for overcoming problems in investigating and exploring the factors that influence the success of EA implementation as an effort to assess the success of achieving future organizational goals.

关键词： Bibliographies Testing Information systems

来源：评论

学校读者我要写书评

暂无评论

Exploring Carotenoid from Chlorella Sorokiniana as a Natural Alternative to Yellow Artificial Food Dyes: Stability and Application in Model System

SSRN

引用

SSRN 2025年

作者： Bianchini, Carlen Bettim Minatel, Gabriela Gomes Schappo, Flávia Barbosa Arend, Giordana Demaman de Mello Castanho Amboni, Renata Dias De Rosso, Veridiana Vera Nunes, Itaciara Larroza Graduate Program in Food Science Department of Food Science and Technology Federal University of Santa Catarina Florianópolis88034-001 Brazil Graduate Program in Food Engineering Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina Florianópolis88040-900 Brazil Nutrition and Food Service Research Center Federal University of São Paulo Santos11015-020 Brazil

This study investigated ultrasound-assisted extraction using ethanol from Chlorella sorokiniana-derived carotenoids and encapsulation by co-crystallization. The carotenoid extract was quantified and identified (HPLC-DAD) and its encapsulation efficiency was assessed. Co-crystals were analyzed for FTIR spectra, morphology (SEM) and stability (moisture, water activity, carotenoid content, and color) over 90 days. Their potential as a natural dye in gelatin was also evaluated. Lutein and β-carotene were the major carotenoids, with an encapsulation efficiency of 53%. FTIR analysis of the co-crystals demonstrated characteristic functional groups of sucrose and carotenoids, while SEM revealed a porous structure with particles diameters ranging from 2 μm to 20 μm. Over storage, moisture, and water activity increased, while carotenoid content decreased. Yellow remained stable in co-crystals for 90 days, whereas gelatin powder showed reduced red and yellow colors. The color of the ready-to-serve gelatin remained stable for seven days. Co-crystals can replace artificial dyes and sugar in gelatin. © 2025, The Authors. All rights reserved.

关键词： Ethanol

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：