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Zhaohua Zhang, Xiangning Tang, Jun Li, Wenyi Yang
PURPOSE: To investigate the effect of cold stimulation (contacting wet fabric) and tactile stimulation (dynamic friction) on skin wetness perception: 1) wetness perception of fabric with different water transfer performance; 2) wetness perception of fabric with different water content; 3) wetness perception of fabric at different friction velocity with skin. METHODS: Twenty participants were screened as reliable assessors using a 7-point wetness rating scale. The dynamic friction between skin and fabric was simulated by a self-made device with adjustable speed controller...
March 14, 2018: International Journal of Occupational Safety and Ergonomics: JOSE
Mohammad Hossein Mirmusavi, Saeed Karbasi, Dariush Semnani, Anousheh Zargar Kharazi
Background: Long-term healing tissue engineering scaffolds must hold its full mechanical strength at least for 12 weeks. Nano-micro scaffolds consist of electrospinning nanofibers and textile microfibers to support cell behavior and mechanical strength, respectively. Methods: The new nano-micro hybrid scaffold was fabricated by electrospinning poly 3-hydroxybutyrate-chitosan-multi-walled carbon nanotube (MWNT functionalized by COOH) solution on knitted silk in a random manner with different amounts of MWNT...
January 2018: Journal of Medical Signals and Sensors
M Demirkurt, Y A Olcer, M M Demir, A E Eroglu
Parabens are used as antimicrobial preservatives in food, cosmetic products and pharmaceuticals regardless of their endocrine disrupting effect. In this study, highly selective molecular imprinted polymers (MIPs) were synthesized in submicron-sizes and converted to an SPME fiber coating through electrospinning process in order to determine parabens in water samples. Conversion of MIP to a fiber is achieved via creation of spacial knitting around MIP by polystyrene. The selectivity and extraction ability of the fibers were compared with the commercial fibers and the corresponding non-imprinted polymer (NIP) coated fiber...
July 19, 2018: Analytica Chimica Acta
Trisha L Andrew, Lushuai Zhang, Nongyi Cheng, Morgan Baima, Jae Joon Kim, Linden Allison, Steven Hoxie
Body-mountable electronics and electronically active garments are the future of portable, interactive devices. However, wearable devices and electronic garments are demanding technology platforms because of the large, varied mechanical stresses to which they are routinely subjected, which can easily abrade or damage microelectronic components and electronic interconnects. Furthermore, aesthetics and tactile perception (or feel) can make or break a nascent wearable technology, irrespective of device metrics...
March 9, 2018: Accounts of Chemical Research
Liying Ying, Lai Har Wu, Xiangli Wu, Jing Shu, Alice Yuen Loke
BACKGROUND/OBJECTIVES: Infertility affects both women and men in the physical, emotional, existential, and interpersonal realms. When couples seek in vitro fertilisation (IVF) treatment, they further suffer from the difficulties of the treatment and the uncertainty of its outcome. The aim of this study was to develop a preliminary conceptual framework for couples undergoing IVF treatment to give health professionals a better understanding of the experiences of such couples, and to guide the development of an intervention...
January 5, 2018: Journal of Reproductive and Infant Psychology
Angelos Tsipis, Anna M Athanassiadou, Emmanouil Petrou, Dimitris Miliopoulos, Pauline Athanassiadou, Nikolaos Kavantzas, George Athanassopoulos
: Cellular morphology reflects biologic behavior and activity of the tissue and of the organ also reflects the genetic and molecular biology of the cells themselves. This intermediary position places examination of the cell in a key role to our understanding of the innumerable processes that affect this closely knit chain, from molecules to host. A large volume of the cell is occupied by organelles that come in a variety of shapes and sizes. Organelles are dynamic to maintain homeostasis and adjust to the various functions of the cell...
April 2018: Journal of Cardiovascular Medicine
Katherine G Akers, Yoan Chérasse, Yuki Fujita, Sakthivel Srinivasan, Takeshi Sakurai, Masanori Sakaguchi
Neural stem and progenitor cells continue to generate new neurons in particular regions of the brain during adulthood. One of these neurogenic regions is the dentate gyrus (DG) of the hippocampus, which plays an important role in cognition and emotion. By exploiting this innate neuronal regeneration mechanism in the DG, new technologies have the potential to promote resistance to or recovery from brain dysfunction or degeneration. However, a deeper understanding of how adult DG neurogenesis is regulated by factors such as sleep and epigenetic modifications of gene expression could lead to further breakthroughs in the clinical application of neural stem and progenitor cells...
February 27, 2018: Stem Cells
Anne Lejay, Benjamin Colvard, Louis Magnus, Delphine Dion, Yannick Georg, Julie Papillon, Fabien Thaveau, Bernard Geny, Lee Swanström, Fréderic Heim, Nabil Chakfé
OBJECTIVE/BACKGROUND: Since the late 1950s, major advances in vascular surgical practice have been closely associated with the introduction of novel vascular implants. These devices have been constructed from a variety of materials and have been designed to be implanted in several different ways. Despite a rigorous regulatory process, regular failures continue to be observed. A systematic review of the literature and of the Geprovas registry was performed in order to improve understanding of the failures...
February 22, 2018: European Journal of Vascular and Endovascular Surgery
Shintaro Nemoto, Hayato Konishi, Ryo Shimada, Tatsuya Suzuki, Takahiro Katsumata, Hideaki Yamada, Jun Sakurai, Yohei Sakamoto, Kazuteru Kohno, Atsuko Onishi, Masaya Ito
OBJECTIVES: Materials used in paediatric cardiac surgery have drawbacks of deterioration, calcification and pseudointimal proliferation resulting in haemodynamic disturbance. The aim of this study was to investigate whether these drawbacks can be overcome by in situ tissue regeneration using a newly developed synthetic hybrid fabric (SHF). METHODS: The SHF is an expandable, warp-knitted fabric composed of a combination of biodegradable [poly-l-lactic acid (PLLA)] and non-biodegradable (polyethylene terephthalate) yarns...
February 14, 2018: European Journal of Cardio-thoracic Surgery
Takashi Tanaka, Akiko Uemura, Ryo Tanaka, Yugo Tasei, Tetsuo Asakura
Development of a small-diameter artificial vascular graft is urgent because existing materials often occlude within a short time. We have shown that small-diameter vascular graft using Bombyx mori silk fibroin is a potential candidate. Silk fibroin grafts are fabricated by coating silk fibroin on the knit tube prepared from silk fibroin fibers. However, there is a serious problem that the coated silk fibroin portion hardens when alcohol is used for insolubilization of the coated silk fibroin. This hardening prevents the desired biodegradation of the coated silk fibroin...
January 1, 2018: Journal of Biomaterials Applications
Paulette Guitard, Lucie Brosseau, George A Wells, Nicole Paquet, Gail Paterson, Karine Toupin-April, Sabrina Cavallo, Sibel Z Aydin, Guillaume Léonard, Gino De Angelis
BACKGROUND: The prevalence of hand osteoarthritis (HOA) has been reported to be higher amongst women over 50 years old (66%) compared to men of the same age (34%). Although exercise therapy has been shown effective in reducing symptoms and disability associated with HOA, adherence to treatment programs remains low. The primary objective of this RCT is to examine the effectiveness of a 12-week knitting program for morning stiffness (primary outcome) and pain relief (secondary outcome) 2 h post-wakening in females (aged 50 to 85 years old) with mild to moderate hand osteoarthritis (HOA)...
February 14, 2018: BMC Musculoskeletal Disorders
Neil C Talbot, Amy E Shannon, Caitlin E Phillips, Wesley M Garrett
The adaptation to feeder-independent growth of a pig embryonic stem cell-derived pancreatic cell line is described. The parental PICM-31 cell line, previously characterized as an exocrine pancreas cell line, was colony-cloned two times in succession resulting in the derivative cell line, PICM-31A1. PICM-31A1 cells were adapted to growth on a polymerized collagen matrix using feeder cell-conditioned medium and were designated PICM-31FF. Like the parental cells, the PICM-31FF cells were small and grew relatively slowly in closely knit colonies that eventually coalesced into a continuous monolayer...
February 13, 2018: In Vitro Cellular & Developmental Biology. Animal
Xu Chen, Cheng Zhong, Bin Liu, Zhi Liu, Xuanxuan Bi, Naiqing Zhao, Xiaopeng Han, Yida Deng, Jun Lu, Wenbin Hu
Flexible, wearable, and portable energy storage devices with high-energy density are crucial for next-generation electronics. However, the current battery technologies such as lithium ion batteries have limited theoretical energy density. Additionally, battery materials with small scale and high flexibility which could endure the large surface stress are highly required. In this study, a yarn-based 1D Zn-air battery is designed, which employs atomic layer thin Co3 O4 nanosheets as the oxygen reduction reaction/oxygen evolution reaction catalyst...
February 1, 2018: Small
N Fournet, L Mollema, W L Ruijs, I A Harmsen, F Keck, J Y Durand, M P Cunha, M Wamsiedel, R Reis, J French, E G Smit, A Kitching, J E van Steenbergen
BACKGROUND: Despite effective national immunisation programmes in Europe, some groups remain incompletely or un-vaccinated ('under-vaccinated'), with underserved minorities and certain religious/ideological groups repeatedly being involved in outbreaks of vaccine preventable diseases (VPD). Gaining insight into factors regarding acceptance of vaccination of 'under-vaccinated groups' (UVGs) might give opportunities to communicate with them in a trusty and reliable manner that respects their belief system and that, maybe, increase vaccination uptake...
January 30, 2018: BMC Public Health
Jana Sogorkova, Vojtech Zapotocky, Martin Cepa, Veronika Stepankova, Hana Vagnerova, Jana Batova, Martina Pospisilova, Jiri Betak, Kristina Nesporova, Martina Hermannova, Dorothée Daro, Garry Duffy, Vladimir Velebny
Polysaccharides meet several criteria for a suitable biomaterial for tissue engineering, which include biocompatibility and ability to support the delivery and growth of cells. Nevertheless, most of these polysaccharides, e.g. dextran, alginate, and glycosaminoglycans, are highly soluble in aqueous solutions. Hyaluronic acid hydrophobized by palmitic acid and processed to the form of wet-spun fibers and the warp-knitted textile scaffold is water non-soluble, but biodegradable material, which could be used for the tissue engineering purpose...
January 29, 2018: Journal of Biomedical Materials Research. Part A
Witold Woźniak, Aleksandra Kozińska, Piotr Ciostek, Izabela Sitkiewicz
We compared association of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Enterococcus faecalis with nine vascular implants after co-culture. Vascular implants were composed of various materials such as warp knitted polyester (with or without gelatin and silver ions), expanded polytetrafluoroethylene and biological materials - surface treated porcine pericardial patch and Omniflow II. The lowest overall number of associated bacteria was detected for polytetrafluoroethylene implants and porcine pericardial patch...
March 30, 2017: Polish Journal of Microbiology
Frederic Wolf, Diana M Rojas González, Ulrich Steinseifer, Markus Obdenbusch, Werner Herfs, Christian Brecher, Stefan Jockenhoevel, Petra Mela, Thomas Schmitz-Rode
In vitro tissue engineering of vascular grafts requires dynamic conditioning in a bioreactor system for in vitro tissue maturation and remodeling to receive a mechanically adequate and hemocompatible implant. The goal of the current work was to develop a bioreactor system for the conditioning of vascular grafts which is (i) able to create a wide range of flow, pressure and frequency conditions, including physiological ones; (ii) compact and easy to assemble; (iii) transportable; (iv) disposable. The system is driven by a small centrifugal pump controlled via a custom-made control unit, which can also be operated on batteries to allow for autonomous transportation...
January 16, 2018: Annals of Biomedical Engineering
Nabil A Ibrahim, Nahed A Abd El-Ghany, Basma M Eid, Eman M Mabrouk
This study demonstrated that antibacterial cellulosic textiles can be fabricated in eco-friendly manner by grafting of monochlorotriazinyl β-cyclodextin (MCT-βCD) onto knitted and woven cotton fabrics followed by post-loading of any of the green active ingredients namely Rosemary oil, Lavender oil, Clove oil, Cinnamon oil, Aloe vera gel, Vanillin, Ag-ions, Natural Yellow 7 and Natural Red 25 dyes into the hydrophobic cavities of grafted β-CD moieties. Some of the grafted, post-loaded fabric samples were characterized by FTIR, SEM, and EDS analysis...
January 11, 2018: International Journal of Biological Macromolecules
Suzie Ehmann, Karen Bock
Compression, in the form of either a compression bandage or a compression stocking, has been touted as the gold standard for treatment of swelling and venous leg ulcers (VLUs). Adjustable Velcro wraps have been marketed as compression alternative. Although there is a growing body of evidence to support use of these products, there has not been a critical evaluation of the functionality of the devices to best matching product to patient presentation and ability to use the device effectively. Unlike compression garments, which are classified by compression category (class I/II or flat knit/circular), there is not an algorithm to direct health professionals to best match a specific adjustable Velcro wrap to an individual patient presentation...
January 1, 2018: Journal of Wound Care
Wangwang Qiu, Cheng Zhong, Rui Xu, Ting Zou, Fujun Wang, Youben Fan, Lu Wang, Zhili Yang
Abdominal wall hernias are repaired with tension-free prosthetic materials but there remains a foreign body response (FBR) to commonly used polypropylene mesh. Thus, we should optimize mesh materials to improve the patient outcomes after surgery. A polypropylene mesh was developed with wrap knitting technique. The physical, mechanical and biocompatible characteristics were tested in a rat abdominal hernia model and compared to ULTRAPRO and Easy Prosthesis. Polypropylene mesh of two pore sizes was developed (LP-WKPM and SP-WKPM)...
January 3, 2018: Journal of Biomedical Materials Research. Part A
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