Journal of nanotechnology in engineering and medicine最新文献_第2页

Polyacrylamide/GelMA Hydrogel Templates for Breast Cancer Cell Spheroids Fabrication 制备乳腺癌细胞球体的聚丙烯酰胺/凝胶水凝胶模板

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4031898

Yuhui Li, Xiang Li, Lu Zheng, Lin Wang, Xiaohui Zhang, Feng Xu

引用次数: 2

The Micro/Nanohybrid Structures Enhancing B35 Cell Guidance on Chitosan 微纳杂化结构增强壳聚糖对B35细胞的引导作用

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4032602

Ying-Ting Lin, Ching-Wen Li, Gou-Jen Wang

引用次数: 2

Discussion: “A Review and Parametric Investigation Into Nanofluid Viscosity Models” (Nwosu, P. N., Meyer, J., and Sharifpur, M., 2014, ASME J. Nanotechnol. Eng. Med., 5(3), p. 031008) 讨论:“纳米流体粘度模型的回顾和参数化研究”(Nwosu, P. N.， Meyer, J.， and Sharifpur, M.， 2014, ASME J. nanotechnology。Eng。医学杂志，5(3)，p. 031008)

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4032016

M. Awad

引用次数: 1

Three-Dimensional Reconstruction of Blood Vessels of the Human Retina by Fractal Interpolation. 基于分形插值的人眼视网膜血管三维重建。

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 Epub Date: 2016-03-17 DOI: 10.1115/1.4032170

Hichem Guedri, Jihen Malek, Hafedh Belmabrouk

引用次数: 6

Vibrations of Fractal Structures: On the Nonlinearities of Damping by Branching 分形结构的振动:关于分支阻尼的非线性

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4032224

P. Torab, D. Piovesan

{"title":"Vibrations of Fractal Structures: On the Nonlinearities of Damping by Branching","authors":"P. Torab, D. Piovesan","doi":"10.1115/1.4032224","DOIUrl":"https://doi.org/10.1115/1.4032224","url":null,"abstract":"To study the effect of damping due to branching in trees and fractal structures, a harmonic analysis was performed on a finite element model using commercially available software. The model represented a three-dimensional (3D) fractal treelike structure, with properties based on oak wood and with several branch configurations. As branches were added to the model using a recursive algorithm, the effects of damping due to branching became apparent: the first natural frequency amplitude decreased, the first peak widened, and the natural frequency decreased, whereas higher frequency oscillations remained mostly unaltered. To explain this nonlinear effect observable in the spectra of branched structures, an analytical interpretation of the damping was proposed. The analytical model pointed out the dependency of Cartesian damping from the Coriolis forces and their derivative with respect to the angular velocity of each branch. The results provide some insight on the control of chaotic systems. Adding branches can be an effective way to dampen slender structures but is most effective for large deformation of the structure.","PeriodicalId":73845,"journal":{"name":"Journal of nanotechnology in engineering and medicine","volume":"6 1","pages":"034502"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4032224","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63494354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Numerical Analysis of Dental Caries Effect on the Biomechanical Behavior of the Periodontal System 龋齿对牙周系统生物力学行为影响的数值分析

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4032689

A. Merdji, N. Della, Ali Benaissa, B. B. Bouiadjra, B. Serier, R. Mootanah, I. Muslih, O. Mukdadi

{"title":"Numerical Analysis of Dental Caries Effect on the Biomechanical Behavior of the Periodontal System","authors":"A. Merdji, N. Della, Ali Benaissa, B. B. Bouiadjra, B. Serier, R. Mootanah, I. Muslih, O. Mukdadi","doi":"10.1115/1.4032689","DOIUrl":"https://doi.org/10.1115/1.4032689","url":null,"abstract":"The aim of this study was to investigate the effect of dental caries on the stability of the periodontal system. This study presents a numerical analysis performed with three-dimensional (3D) finite element (FE) method to evaluate stresses in the bone surrounding the tooth with dynamic mastication combined loadings. In this work, we present a comparative study on infected and healthy periodontal systems. The infected tooth was modeled and a caries defect was introduced to the tooth coronal part. The infected tooth was evaluated and equivalent von Mises interface stress values were obtained for comparison with the ones exhibited by the healthy tooth. Our results by 3D FE analysis indicated that maximum stresses occurred primarily at the cervical level of root and alveolar bone. In the cortical bone, the stress value was greater in infected system (21.641 MPa) than in healthy system (15.752 MPa), i.e., a 37.4% increase. However, in the trabecular bone we observed only 1.6% increase in the equivalent stress values for the infected tooth model. Stress concentration at the cervical level may cause abnormal bone remodeling or bone loss, resulting loss of tooth attachment or bone damage. Our findings showed that decayed single-rooted teeth are more vulnerable to apical root resorption than healthy teeth. The numerical method presented in this study not only can aid the elucidation of the biomechanics of teeth infected by caries but also can be implemented to investigate the effectiveness of new advanced restorative materials and protocols.","PeriodicalId":73845,"journal":{"name":"Journal of nanotechnology in engineering and medicine","volume":"6 1","pages":"031004"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4032689","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63494950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Analyzing Origin of Multifractality of Surface Electromyography Signals in Dynamic Contractions 动态收缩时表面肌电信号多重分形的来源分析

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4032005

K. Marri, R. Swaminathan

{"title":"Analyzing Origin of Multifractality of Surface Electromyography Signals in Dynamic Contractions","authors":"K. Marri, R. Swaminathan","doi":"10.1115/1.4032005","DOIUrl":"https://doi.org/10.1115/1.4032005","url":null,"abstract":"The aim of this study is analyze the origin of multifractality of surface electromyography (sEMG) signals during dynamic contraction in nonfatigue and fatigue conditions. sEMG signals are recorded from triceps brachii muscles of twenty two normal healthy subjects. The signals are divided into six equal segments on time scale for normalization. The first and sixth segments are considered as nonfatigue and fatigue condition respectively. The source of multifractality can be due to correlation and probability distribution. The original sEMG series are transformed into shuffled and surrogate series. These three series namely, original, shuffled and surrogate series in nonfatigue and fatigue conditions are subjected to multifractal detrended fluctuation analysis (MFDFA) and features are extracted. The results indicate that sEMG signals exhibit multifractal behavior. Further investigation revealed that origin of multifractality is primarily due to correlation. The origin of multifractality due to correlation is quantified as 80% in nonfatigue and 86% in fatigue conditions. This method of multifractal analysis may be useful for analyzing progressive changes in muscle contraction in varied neuromuscular studies.","PeriodicalId":73845,"journal":{"name":"Journal of nanotechnology in engineering and medicine","volume":"6 1","pages":"031002"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4032005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63493147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Real-Time Computational Model of Ball-Milled Fractal Structures 球磨分形结构的实时计算模型

Journal of nanotechnology in engineering and medicine Pub Date : 2015-08-01 DOI: 10.1115/1.4031276

Constantine C. Doumanidis, I. Gunduz, C. Rebholz, C. Doumanidis

引用次数: 6

Multimaterial and Multiscale Three-Dimensional Bioprinter 多材料和多尺度三维生物打印机

Journal of nanotechnology in engineering and medicine Pub Date : 2015-05-01 DOI: 10.1115/1.4031230

J. Campbell, Ian McGuinness, H. Wirz, A. Sharon, A. Sauer-Budge

引用次数: 21

Alginate Microspheroid Encapsulation and Delivery of MG-63 Cells Into Polycaprolactone Scaffolds: A New Biofabrication Approach for Tissue Engineering Constructs 海藻酸盐微球包封MG-63细胞并将其递送至聚己内酯支架:组织工程构建的一种新的生物制造方法

Journal of nanotechnology in engineering and medicine Pub Date : 2015-05-01 DOI: 10.1115/1.4031174

L. Narayanan, Arun Kumar, Zhuo Tan, S. Bernacki, B. Starly, Rohan A. Shirwaiker

{"title":"Alginate Microspheroid Encapsulation and Delivery of MG-63 Cells Into Polycaprolactone Scaffolds: A New Biofabrication Approach for Tissue Engineering Constructs","authors":"L. Narayanan, Arun Kumar, Zhuo Tan, S. Bernacki, B. Starly, Rohan A. Shirwaiker","doi":"10.1115/1.4031174","DOIUrl":"https://doi.org/10.1115/1.4031174","url":null,"abstract":"Scaffolds play an important role in tissue engineering by providing structural framework and a surface for cells to attach, proliferate, and secrete extracellular matrix (ECM). In order to enable efficient tissue formation, delivering sufficient cells into the scaffold three-dimensional (3D) matrix using traditional static and dynamic seeding methods continues to be a critical challenge. In this study, we investigate a new cell delivery approach utilizing deposition of hydrogel-cell encapsulated microspheroids into polycaprolactone (PCL) scaffolds to improve the seeding efficiency. Three-dimensional-bioplotted PCL constructs (0 deg/90 deg lay down, 284 ± 6 μm strand width, and 555 ± 8 μm strand separation) inoculated with MG-63 model bone cells encapsulated within electrostatically generated calcium-alginate microspheroids (O 405 ± 13 μm) were evaluated over seven days in static culture. The microspheroids were observed to be uniformly distributed throughout the PCL scaffold cross section. Encapsulated cells remained viable within the constructs over the test interval with the highest proliferation noted at day 4. This study demonstrates the feasibility of the new approach and highlights the role and critical challenges to be addressed to successfully utilize 3D-bioprinting for microencapsulated cell delivery.","PeriodicalId":73845,"journal":{"name":"Journal of nanotechnology in engineering and medicine","volume":"6 1","pages":"021003"},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1115/1.4031174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63491112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6