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A tribo-chemical view on astringency of plant-based food substances

Friction 2024年第7期12卷 1392-1407页

作者： Samuel S.GAMANIEL Paloma S.DUEÑAS ROBLES Hans TROMP Els H.A.de HOOG Sissi de BEER emile van der heide Laboratory for Surface Technology and Tribology Faculty of Engineering TechnologyUniversity of TwenteEnschede 7522 LWthe Netherlands NIZO Food Research B.V. Ede6710 BAthe Netherlands Department of Molecules and Materials MESA+Institute for Nanotechnology University of TwenteEnschede 7500 AEthe Netherlands

Consumption of plant-based food products having high composition of polyphenols leads to the sensation of *** sliding oral surfaces,friction is an essential property during the oral perception of roughness and dryness which are attributes associated with *** factors including the chemical composition of interacting layers,structure and operation of interfaces have an effect on the astringency development *** manner of interactions occurring at oral interfaces suggest there is a system dependence of astringency and highlights the importance of adopting a tribosystems *** measurement techniques have shown an existing relationship between salivary protein-polyphenol interaction and an astringent ***,the tribo-chemistry involved in this multifaceted sensation remains largely unexplored in a comprehensive *** this review the underlying tribo-chemical processes useful in understanding the mechanism of astringency are highlighted and discussed considering current techniques employed to investigate astringency *** of lubrication on oral surfaces owing to the tribo-chemical interactions involving saliva and astringent plant proteins requires subsequent deformations of oral tissues which are significant enough to induce strains at mechanoreceptor locations,leading to the sensation of *** is proposed that micro-scale contact modelling on the interaction of food particles/aggregates,boundary layers and oral surfaces shows potential in addressing the knowledge gap between tribo-chemical measurement techniques and panel tests,making it possible to attain a predictor for astringency.

关键词： oral lubrication astringency tribo-chemistry tribology

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Design of bidirectional frictional behaviour for tactile contact using ellipsoidal asperity micro-textures

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Friction 2022年第5期10卷 762-771页

作者： Dmitrii SERGACHEV David MATTHEWS emile van der heide Laboratory for Surface Technology and Tribology Faculty of Engineering TechnologyUniversity of TwenteOverissel 7522 LIWEnschedethe Netherlands Faculty of Engineering and Architecture Ghent UniversitEast Flanders 9000GhenBelgium

Tactile perception and friction can be modified by producing a deterministic surface *** of surface feature arrangement and texture symmetry can produce an anisotropic frictional *** is generally achieved through skin hysteresis by promoting its *** work investigates whether a bidirectional friction can be created with microscale ellipsoidal asperity textures,thus relying on the adhesive component of *** this purpose,four textured samples with various asperity dimensions were moulded with a silicone rubber having an elastic modulus comparable to that of the *** of friction measurements were conducted in-vivo in two sliding directions with a range of normal loads up to 4 *** element method(FEM)was used to study elastic deformation effects,explain the observed friction difference,and predict surface material *** performed perpendicular to the asperity major radii showed consistently higher friction coefficients than that during parallel *** the larger asperity dimensions,a change of the sliding direction increased friction up to a factor of *** numerical analysis showed that this effect is mostly related to elastic asperity *** friction differences can be further controlled by asperity dimensions,spacing,and material properties.

关键词： surface texture sliding direction skin friction elastomer

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Influence of surgical suture properties on the tribological interactions with artificial skin by a capstan experiment approach

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Friction 2017年第1期5卷 87-98页

作者： Tianhui REN Xiangqiong ZENG emile van der heide School of Chemistry and Chemical Engineering Key Laboratory for Thin Film and Microfabrication of the Ministry of Education Shanghai Jiao Tong University Shanghai 200240 China Advanced Lubricating Materials Laboratory Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 ChinaLaboratory for Surface Technology and Tribology University of Twente Enschede 7500AE the Netherlands Laboratory for Surface Technology and Tribology University of Twente Enschede 7500AE the NetherlandsTU Delft Faculty of Civil Engineering and Geosciences Stevinweg 1 Delft 2628 CN the Netherlands

Tribological interactions between surgical suture and human tissue play an important role in the stitching *** purpose of the paper is to understanding the tribological behavior of surgical suture interacting with artificial skin,with respect to surgical suture material and structure,by means of a capstan experiment approach and a contact area *** results indicated that structure and surface topography of the surgical suture had a pronounced effect on the tribological *** apparent coefficient of friction of vicryl surgical suture was the smallest among the three surgical suture *** the sliding velocity increased,or the applied load decreased,the coefficient of friction ***,stick-slip phenomena were observed during the sliding procedure.

关键词： friction sliding surgical suture artificial skin capstan experiment

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Dopamine hydrochloride and carboxymethyl chitosan coatings for multifilament surgical suture and their influence on friction during sliding contact with skin substitute

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Friction 2020年第1期8卷 58-69页

作者： Gangqiang ZHANG Ganlin ZHENG Tianhui REN Xiangqiong ZENG emile van der heide Advanced Lubricating Materials Laboratory Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Institute of Functional Textiles and Advanced Materials Colloge of Textlies&ClothingQingdao UniversityQingdao 266000China School of Chemistry and Chemical Engineering Key Laboratory of Thin Film and Microfabrication Technology(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200240China Laboratory for Surface Technology and Tribology University of TwenteEnschede 7500AEThe Netherlands TU Delft Faculty of Civil Engineering and GeosciencesStevinweg 1Delft 2628 CNThe Netherlands Soete Laboratory Ghent UniversityZwijnaarde B-9052Belgiu

In order to reduce the damage to tissue and fill the interstices between fibers,multifilament sutures are frequently treated with certain coating *** objective of this study was to create and characterize dopamine hydrochloride(DA)and carboxymethyl chitosan(CMCS)coatings on surgical sutures and investigate their effects on the frictional performance of the surgical sutures during sliding through a skin *** effects of the treatment on the physical and chemical characteristics of the surgical sutures were *** friction force of the surgical sutures during sliding through the skin substitute was experimentally determined using a penetration friction *** coefficient of friction(COF)was calculated using a linear elastic model and was used to estimate the frictional behavior of the surgical suture‐skin *** results showed that the DA coating could evenly deposit on the surface of the etched multifilament surgical suture surfaces in a weakly alkaline buffer *** CMCS coating material could form a uniform film on the surface of the *** changes in the surface roughness of the multifilament surgical sutures with different treatments occurred in this *** friction force and the COF of the multifilament surgical sutures with DA and CMCS coating showed little change when compared with untreated multifilament surgical sutures.

关键词： friction surgical suture coating Biomaterials skin substitute

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Skin tribology:Science friction?

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Friction 2013年第2期1卷 130-142页

作者： E.van der heide X.ZENG M.A.MASEN Laboratory for Surface Technology and Tribology Faculty of Engineering TechnologyUniversity of TwenteDrienerlolaan 57522 NB EnschedeThe Netherlands TNO De Rondom 15612 AP EindhovenThe Netherlands

The application of tribological knowledge is not just restricted to optimizing mechanical and chemical engineering *** fact,effective solutions to friction and wear related questions can be found in our everyday *** important part is related to skin tribology,as the human skin is frequently one of the interacting surfaces in relative *** seem to solve these problems related to skin friction based upon a trial-and-error strategy and based upon on our sense for *** question of course rises whether or not a trained tribologist would make different choices based upon a science based strategy?In other words:Is skin friction part of the larger knowledge base that has been generated during the last decades by tribology research groups and which could be referred to as Science Friction?This paper discusses the specific nature of tribological systems that include the human skin and argues that the living nature of skin limits the use of conventional *** tribology requires in vivo,subject and anatomical location specific test *** predictive friction models can only partially be applied to predict in vivo skin *** reason for this is found in limited understanding of the contact mechanics at the asperity level of product-skin interactions.A recently developed model gives the building blocks for enhanced understanding of friction at the micro *** largely simplified power law based equations are currently available as general engineering ***,the need for friction control is illustrated by elaborating on the role of skin friction on discomfort and *** texturing and polymer brush coatings are promising directions as they provide way and means to tailor friction in sliding contacts without the need of major changes to the product.

关键词： friction bio-tribology skin soft tissue surface texture brush coatings

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Finger pad friction and tactile perception of laser treated,stamped and cold rolled micro-structured stainless steel sheet surfaces

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Friction 2017年第2期5卷 207-218页

作者： S.ZHANG X.ZENG D.T.A MATTHEWS A.IGARTUA E.RODRIGUEZ-VIDAL J.CONTRERAS FORTES E.van der heide State Key Laboratory of Tribology Tsinghua University Beijing 100084 ChinaLaboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the Netherlands Shanghai Advanced Research Institute Chinese Academy of Sciences China Laboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsTata Steel Research & Development PO Box 10000 IJmuiden 1970CA the Netherlands IK4-Tekniker C/Ignacio Goenaga 5 Eibar 20600 Spain Acerinox Europa SAU Los Barrios Spain Laboratory for Surface Technology and Tribology Faculty of Engineering Technology University of Twente Drienerlolaan 5 Enschede 7522 NB the NetherlandsTU Delft Faculty of Civil Engineering and Geosciences Stevinweg 1 Delft 2628 CN the Netherlands

Tactile perception is a complex system,which depends on frictional interactions between skin and *** contact mechanics of tactile friction is governed by many factors such as the state and properties of skin and *** order to discover the connection between perception and tactile friction on textured stainless steel sheets,both perception experiments (subjective) and tactile friction measurements (objective) were performed in this *** perception experiments were carried out by using a panel test method to identify the perceived roughness,perceived stickiness and comfort level from the *** the friction experiments,tactile friction was measured by a multi-axis force/torque transducer in *** perceived stickiness was illustrated as an effective subjective stimulus,which has a negative correlation to the comfort *** significant evidence was revealed to the connection between the perceived roughness and comfort perception,and this relationship may be influenced by the participants' individual experience,gender and moisture level of ***,the kinetic tactile friction was concluded as an objective stimulus to the comfort perception with a negative correlation.

关键词： tactile friction perception pleasant touch biotribology

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国际新闻报道中经济依赖与媒体偏见的关系 ——基于四家欧洲报纸对中美贸易战的报道

国际新闻报道中经济依赖与媒体偏见的关系 ...

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作者： Mette van der heide 华东师范大学

学位级别：硕士

通过内容分析和批评性语篇分析（CDA）相结合的方法,探讨了国际新闻制作中国家间经济依赖与媒体偏见的关系。这篇论文包含一个基本命题,即经济相互依存度高与更积极的报道相关。为了检验这一关系,本文运用框架理论对欧洲的4家报纸的730... 详细信息

通过内容分析和批评性语篇分析（CDA）相结合的方法,探讨了国际新闻制作中国家间经济依赖与媒体偏见的关系。这篇论文包含一个基本命题,即经济相互依存度高与更积极的报道相关。为了检验这一关系,本文运用框架理论对欧洲的4家报纸的730篇文章有关中美贸易战的报道进行内容分析和框架分析。本论文发现,中国报告中的正面偏向与关注经济机遇的框架相关,而负面偏向框架与关注政治差异这方面相关。对于欧洲的那四家报纸来说,政治差异和经济机遇的框架似乎是不相容的:当同时被用于消极的政治和积极的经济方面时,政治差异被赋予了更高的重要性,并消除了对经济机遇的正面偏向。政治框架在德国报纸中最为重要,这与德国的亲欧洲立场以及德国在欧盟中处于主导地位有关。因此,在报道中美贸易战时,《德国时代周报》对中国持负面态度。意大利报纸《共和报》对中国的评价最正面,这与最近意大利加入“一带一路”倡议,与中国的政治交流更加密切有关,同时也与其在全球贸易中较弱的经济地位有关。通过内容研究还发现,对中国持正面偏向报道的增加并不必然与美国的负面偏向有关,反之亦然。这两种形式的偏向可以独立存在。这项研究表明,,意识形态的差异对中国造成了死板的不信任的态度。如果要解决此问题,最好能更好地认识框架困境,以便可以从经济和政治两个角度独立地进行报道。

关键词：批评性语篇分析中美贸易战国际新闻新闻偏见国 CDA 内容分析际媒体学

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The Differing Effects of Nociception and Pain Memory on Pain Thresholds in Participants with and without a History of Injury: A Pretest-Posttest Quasi Experimental Study

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Journal of Behavioral and Brain Science 2022年第8期12卷 359-379页

作者： derrick G. Sueki Kim Dunleavy Emilio J. Puentedura Lindsey Heard Peter van der heide Ming-Shun Cheng Department of Physical Therapy Azusa Pacific University Azusa USA Department of Physical Therapy University of Florida Gainesville USA Department of Physical Therapy Baylor University Waco USA Scripps Memorial Hospital Encinitas USA Amigo Baby Oxnard USA Department of Physical Therapy Nova Southeastern University Fort Lauderdale USA

Purpose: Memory has been identified as an important protective feature to prevent future injury, but its role has yet to be ascertained. The current study aimed to determine whether there was a difference in pressure pain threshold (PPT) responses between participants with a prior history of injury of lower extremity injury (PSI) and those without (NPSI) when exposed to 1) experimental mechanical pain, 2) short-term memory recall of a painful stimulus, or 3) long-term memory of the pain associated with a prior injury. Subjects and Methods: The study used a pretest-posttest quasi-experimental design. A convenience sample of 59 pain-free participants was recruited from an urban university. Twenty-nine PSI and 30 NPSI were stratified into two groups based on their injury history with PPT values measured at baseline and immediately following each of the three experimental conditions. A repeated measure ANCOVA analysis was conducted for each condition to determine whether there was a difference in PPT responses between the two groups. Results: There was a statistically significant difference in PPT values between the two groups when exposed to experimental pain, F(1,57) = 6.010, p = 0.017, partial η2 = 0.095 and with long-term pain memory, F(1,57) = 4.886, p = 0.031, partial η2 = 0.079. There was no statistically significant difference between groups with short-term pain memory, F(1,57) = 3.925, p = 0.052, partial η2 = 0.064. Conclusions: These findings suggest that pain processing may be altered by pain memory, highlighting the role of experience and memory in the rehabilitation process.

关键词： Pain Memory Nociception Pressure Pain Threshold Pain Perception Pain Learning

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The Inter- and Intraindividual Anatomical Relationship of the Femoral Anteversion and Distal Femoral Rotation. A Cadaveric Study on the Femoral Anteversion Angle, Posterior and Inferior Condylar Angle Using Computed Tomography

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Advances in Computed Tomography 2015年第1期4卷 9-18页

作者： H. M. J. van der Linden-van der Zwaag L. C. D. Konijn T. J. van der Steenhoven H. J. L. van der heide M. C. de Ruiter R. G. H. H. Nelissen Department of Orthopaedic Surgery Leiden University Medical Center Leiden The Netherlands Department of Anatomy Leiden University Medical Center Leiden The Netherlands

Malrotation following Total Knee Arthroplasty (TKA) is directly related to poor outcome. Knowledge of the rotational axes (torsion) and angles is therefore important. The aim of the study was to determine whether an association existed between the Femoral Anteversion Angle (FAA) Posterior Condylar Angle (PCA) and the Inferior Condylar Angle (ICA) in individuals. A CT scan of 50 (25 paired) cadaver femora was made. The FAA, PCA and ICA were measured. Statistical analysis of comparative relationships between these different angles was examined by calculating Pearson correlation coefficients and a paired t-test. The mean FAA, PCA and ICA for the whole group were respectively 11.7° (range 0 - 32, SD 8.2), 5.18° (range 0 - 12, SD 2.4) and 4.4° (range 0 - 10, SD 2.1). A correlation of 0.82 (p = 0.01) of the FAA was found between left versus right. For the overall group a correlation coefficient between the PCA of the left and right femur was r = 0.59, p = 0.01. The Pearson correlation between the FAA and PCA in the whole group was r = 0.27, p = 0.06. In females this was r = 0.54 (p = 0.03). Although the difference of the mean ICA and PCA was very small (0.7°), there was no correlation between these angles (r = 0.14, p = 0.23). In conclusion, one should be aware that, considering the weak correlation of the FAA and PCA, an individual rotational variation exists. Furthermore, no correlation was found between the PCA and ICA. Therefore, for now, this angle cannot be assumed to be helpful in TKA. A more individual approach in total knee arthroplasty seems essential for future TKA.

关键词： Knee Femoral Anteversion Angle Posterior Condylar Angle Inferior Condylar Angle Computed Tomography

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The Influence of Pain: Quality of Life after <i>Pectus excavatum</i>Correction

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Open Journal of Pediatrics 2014年第3期4卷 216-221页

作者： Wietse P. Zuidema Alida F. W. van der Steeg Jan W. A. Oosterhuis Christien Sleeboom Stefan M. van der heide Elly S. M. de Lange-de Klerk Hugo A. Heij Department of Cardio-Thoracic Surgery Radboud University Medical Center Nijmegen The Netherlands Department of Epidemiology and Biostatistics VU University Medical Center Amsterdam The Netherlands Department of Surgery VU University Medical Center Amsterdam The Netherlands Pediatric Surgical Center of Amsterdam Emma Children’s Hospital AMC and VU University Medical Center Amsterdam The Netherlands

Introduction: The main indication for surgery of thoracic wall deformities (TWD) is psychological due to cosmetic complaints. The assumption is that appearances have a negative effect on?self-esteem and quality of life?(QoL). Correction should result in improvement. Methods: Prospective trial. QoL was assessed using the?CHQ and the WHOQOL-bref. Measurements were taken before surgery (T1) and 6 weeks thereafter (T2). Results: Forty-two patients were included.?WHOQOL-bref showed differences between pre-operative and?six weeks past surgery on facet body image (p = 0.003).?Self-esteem (CHQ) did not show a significant improvement at T2.?Concerning the scores on the single step questionnaire (SSQ),?33 patients were “very” to “extremely satisfied” with appearance and increased self-esteem (p < 0.001). Concerning the domain “pain and physical complaints”, CHQ did show a significant change (p < 0.001) with more complaints at T2. Conclusion: Six weeks after surgical correction of a TWD satisfaction with the “new” chest is good;pain seems to be a problem with possible negative influence on self-esteem.

关键词： Pain Quality of Life (Qol) Pectus Chest Wall Deformity

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