keyword
MENU ▼
Read by QxMD icon Read
search

Self healing

keyword
https://www.readbyqxmd.com/read/28225124/electrowetting-without-external-voltage-using-paint-on-electrodes
#1
Collin B Eaker, Ishan D Joshipura, Logan R Maxwell, Jason Heikenfeld, Michael D Dickey
Electrowetting uses voltage to manipulate small volumes of fluid for applications including lab-on-a-chip and optical devices. To avoid electrochemical reactions, a dielectric often separates the fluid from the electrode, which has the undesired effect of adding processing steps while increasing the voltage necessary for electrowetting. We present a new method to dramatically reduce the complexity of electrode and dielectric fabrication while enabling multiple performance advances. This method relies on a self-oxidizing paint-on liquid-metal electrode that can be fabricated in minutes on rigid, rough, or even elastic substrates, enabling low operation voltages (<1 V), and self-healing upon dielectric breakdown...
February 22, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28221776/the-horizon-of-materiobiology-a-perspective-on-material-guided-cell-behaviors-and-tissue-engineering
#2
Yulin Li, Yin Xiao, Changsheng Liu
Although the biological functions of cell and tissue can be regulated by biochemical factors (e.g., growth factors, hormones), the biophysical effects of materials on the regulation of biological activity are receiving more attention. In this Review, we systematically summarize the recent progress on how biomaterials with controllable properties (e.g., compositional/degradable dynamics, mechanical properties, 2D topography, and 3D geometry) can regulate cell behaviors (e.g., cell adhesion, spreading, proliferation, cell alignment, and the differentiation or self-maintenance of stem cells) and tissue/organ functions...
February 21, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28221707/dynamic-covalent-polymer-networks-from-old-chemistry-to-modern-day-innovations
#3
REVIEW
Weike Zou, Jiante Dong, Yingwu Luo, Qian Zhao, Tao Xie
Dynamic covalent polymer networks have long been recognized. With the initial focus on the unintended impact of dynamic covalent linkages on the viscoelasticity of commercial rubbers, efforts in modern times have transitioned into designing dynamic covalent polymer networks with unique adaptive properties. Whereas self-healing and thermoset reprocessing have been the primary motivations for studying dynamic covalent polymer networks, the recent discovery of the vitrimeric rheological behavior and solid-state plasticity for this type of material have opened up new opportunities in material innovations...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221703/multiblock-copolymer-based-dual-dynamic-disulfide-and-supramolecular-crosslinked-self-healing-networks
#4
So Young An, Seung Man Noh, Jung Kwon Oh
A new multiblock copolymer self-healing strategy is reported that centers on the synthesis of block copolymers designed with different self-healing motifs incorporated into individual blocks. As a proof of concept, a novel pentablock copolymer (ABCBA) consisting of a poly(ethylene glycol) middle block and self-healable symmetric blocks of a polymethacrylate with pendant disulfide linkages and carboxylic acids is synthesized by a combination of consecutive controlled radical polymerization with hydrolytic cleavage...
February 21, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28220520/factors-associated-with-villus-atrophy-in-symptomatic-coeliac-disease-patients-on-a-gluten-free-diet
#5
S Mahadev, J A Murray, T-T Wu, V S Chandan, M S Torbenson, C P Kelly, M Maki, P H R Green, D Adelman, B Lebwohl
BACKGROUND: Duodenal injury persists in some coeliac disease patients despite gluten-free diet, and is associated with adverse outcomes. AIM: To determine the prevalence and clinical risk factors for persistent villus atrophy among symptomatic coeliac disease patients. METHODS: A nested cross-sectional analysis was performed on coeliac disease patients with self-reported moderate or severe symptoms while following a gluten-free diet, who underwent protocol-mandated duodenal biopsy upon enrolment in the CeliAction clinical trial...
February 20, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28220146/horseback-riding-improves-the-ability-to-cause-the-appropriate-action-go-reaction-and-the-appropriate-self-control-no-go-reaction-in-children
#6
Nobuyo Ohtani, Kenji Kitagawa, Kinuyo Mikami, Kasumi Kitawaki, Junko Akiyama, Maho Fuchikami, Hidehiko Uchiyama, Mitsuaki Ohta
BACKGROUND: There are many obvious health benefits to riding, including developing a strong core and legs, but there are also many less obvious benefits, such as increased confidence and introspection. Few studies have addressed the effects of horseback riding on children and the mechanisms underlying how riding affects humans. We examined the effects of horseback riding on the ability to distinguish Go/No-go tasks and solve arithmetic problems in children. METHODS: The subjects were 34 boys and 72 girls, aged 10-12 years old, which were divided into three groups (horse riding, walking, and resting)...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28211851/development-casparian-self-healing
#7
Guillaume Tena
No abstract text is available yet for this article.
February 17, 2017: Nature Plants
https://www.readbyqxmd.com/read/28198631/robust-alginate-catechol-polydopamine-free-standing-mem-branes-obtained-from-the-water-air-interface
#8
Florian Ponzio, Vincent Le Houérou, Spyridon Zafeiratos, Christian Gauthier, Tony Garnier, Loic Jierry, Vincent Ball
The formation of polydopamine composite membranes at the water/air interface using different chemical strategies is reported. The use of either small molecules (urea, pyrocatechol) or polymers paves the way to understand which kind of compounds can be used for the formation of PDA-composite free-standing membranes produced at the water/air inter-face. Based on these screening results, we have found that alginate grafted with catechol groups allows the formation of robust free-standing films with asymmetric composition, stimuli-responsive and self-healing properties...
February 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28194537/strain-induced-inflammation-in-pulmonary-alveolar-tissue-due-to-mechanical-ventilation
#9
Parya Aghasafari, Israr Bin M Ibrahim, Ramana Pidaparti
Inflammation is the body's attempt at self-protection to remove harmful stimuli, including damaged cells, irritants, or pathogens and begin the healing process. In this study, strain-induced inflammation in pulmonary alveolar tissue under high tidal volume is investigated through a combination of an inflammation model and fluid structure interaction (FSI) analysis. A realistic three-dimensional organ model for alveolar sacs is built, and FSI is employed to evaluate strain distribution in alveolar tissue for different tidal volume (TV) values under the mechanical ventilation (MV) condition...
February 13, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28188152/perineal-resuturing-versus-expectant-management-following-vaginal-delivery-complicated-by-a-dehisced-wound-preview-a-nested-qualitative-study
#10
L Dudley, C Kettle, J Waterfield, Khaled M K Ismail
OBJECTIVE: To explore women's lived experiences of a dehisced perineal wound following childbirth and how they felt participating in a pilot and feasibility randomised controlled trial (RCT). DESIGN: A nested qualitative study using semistructured interviews, underpinned by descriptive phenomenology. PARTICIPANTS AND SETTING: A purposive sample of six women at 6-9 months postnatal who participated in the RCT were interviewed in their own homes...
February 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28185335/electrical-and-structural-origin-of-self-healing-phenomena-in-pentacene-thin-films
#11
Evan S H Kang, Hongbin Zhang, Wolfgang Donner, Heinz von Seggern
Self-healing induced by structural phase transformation is demonstrated using pentacene field-effect transistors. During the self-healing process, electrical properties at pentacene interfaces improve due to the phase transformation from monolayer phase to thin-film phase. Enhanced mobility is confirmed by first-principles calculations.
February 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28183619/self-healing-ph-sensitive-poly-methyl-vinyl-ether-alt-maleic-acid-based-supramolecular-hydrogels-formed-by-inclusion-complexation-between-cyclodextrin-and-adamantane
#12
Xiaoe Ma, Naizhen Zhou, Tianzhu Zhang, Wanjun Hu, Ning Gu
Self-healing materials are of interest for drug delivery, cell and gene therapy, tissue engineering, and other biomedical applications. In this work, on the base of biocompatible polymer poly(methyl vinyl ether-alt-maleic acid) (P(MVE-alt-MA)), host polymer β-cyclodextrin-grafted P(MVE-alt-MA) (P(MVE-alt-MA)-g-β-CD) and guest polymer adamantane-grafted P(MVE-alt-MA) (P(MVE-alt-MA)-g-Ad) were first prepared. Then through taking advantage of the traditional host-guest interaction of β-cyclodextrin and adamantane, a novel self-healing pH-sensitive physical P(MVE-alt-MA)-g-β-CD/P(MVE-alt-MA)-g-Ad supramolecular hydrogels were obtained after simply mixing the aqueous solution of host polymer and guest polymer...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28182420/styrene-purification-by-guest-induced-restructuring-of-pillar-6-arene
#13
Kecheng Jie, Ming Liu, Yujuan Zhou, Marc A Little, Satyanarayana Bonakala, Samantha Y Chong, Andrew Stephenson, Linjiang Chen, Feihe Huang, Andrew I Cooper
The separation of styrene (St) and ethylbenzene (EB) mixtures is important in the chemical industry. Here, we explore the St and EB adsorption selectivity of two pillar-shaped macrocyclic pillar[n]arenes (EtP5 and EtP6; n = 5 and 6). Both crystalline and amorphous EtP6 can capture St from a St-EB mixture with remarkably high selectivity. We show that EtP6 can be used to separate St from a 50:50 v/v St:EB mixture, yielding in a single adsorption cycle St with a purity of >99%. Single-crystal structures, powder X-ray diffraction patterns, and molecular simulations all suggest that this selectivity is due to a guest-induced structural change in EtP6 rather than a simple cavity/pore size effect...
February 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28176864/atomic-vapor-as-a-source-of-tunable-non-gaussian-self-reconstructing-optical-modes
#14
Jon D Swaim, Kaitlyn N David, Erin M Knutson, Christian Rios, Onur Danaci, Ryan T Glasser
In this manuscript, we demonstrate the ability of nonlinear light-atom interactions to produce tunably non-Gaussian, partially self-healing optical modes. Gaussian spatial-mode light tuned near to the atomic resonances in hot rubidium vapor is shown to result in non-Gaussian output mode structures that may be controlled by varying either the input beam power or the temperature of the atomic vapor. We show that the output modes exhibit a degree of self-reconstruction after encountering an obstruction in the beam path...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28169527/molecular-biodynamers-dynamic-covalent-analogues-of-biopolymers
#15
Yun Liu, Jean-Marie Lehn, Anna K H Hirsch
Constitutional dynamic chemistry (CDC) features the use of reversible linkages at both molecular and supramolecular levels, including reversible covalent bonds (dynamic covalent chemistry, DCC) and noncovalent interactions (dynamic noncovalent chemistry, DNCC). Due to its inherent reversibility and stimuli-responsiveness, CDC has been widely utilized as a powerful tool for the screening of bioactive compounds, the exploitation of receptors or substrates driven by molecular recognition, and the fabrication of constitutionally dynamic materials...
February 7, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28169478/light-switchable-self-healing-hydrogel-based-on-host-guest-macro-crosslinking
#16
Qiaofeng Yang, Ping Wang, Chuanzhuang Zhao, Wenqin Wang, Jingfa Yang, Qiao Liu
A self-healing hydrogel is prepared by crosslinking acrylamide with a host-guest macro-crosslinker assembled from poly(β-cyclodextrin) nanogel and azobenzeneacrylamide. The photoisomerizable azobenzene moiety can change its binding affinity with β-cyclodextrin, therefore the crosslinking density and rheology property of the hydrogel can be tuned with light stimulus. The hydrogel can repair its wound autonomously through the dynamic host-guest interaction. In addition, the wounded hydrogel will lose its ability of self-healing when exposed to ultraviolet light, and the self-healing behavior can be recovered upon the irradiation of visible light...
February 7, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28169473/fluorescence-detection-of-microcapsule-type-self-healing-based-on-aggregation-induced-emission
#17
Young Kyu Song, Beomjin Kim, Tae Hee Lee, Jin Chul Kim, Joon Hyun Nam, Seung Man Noh, Young Il Park
An extrinsic self-healing coating system containing tetraphenylethylene (TPE) in microcapsules was monitored by measuring aggregation-induced emission (AIE). The core healing agent comprised of methacryloxypropyl-terminated polydimethylsiloxane, styrene, benzoin isobutyl ether, and TPE was encapsulated in a urea-formaldehyde shell. The photoluminescence of the healing agent in the microcapsules was measured that the blue emission intensity dramatically increased and the storage modulus also increased up to 10(5) Pa after the photocuring...
February 7, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28167967/enhancement-of-anti-inflammatory-and-osteogenic-abilities-of-mesenchymal-stem-cells-via-cell-to-cell-adhesion-to-periodontal-ligament-derived-fibroblasts
#18
Keita Suzuki, Naoyuki Chosa, Shunsuke Sawada, Naoki Takizawa, Takashi Yaegashi, Akira Ishisaki
Mesenchymal stem cells (MSCs) are involved in anti-inflammatory events and tissue repair; these functions are activated by their migration or homing to inflammatory tissues in response to various chemokines. However, the mechanism by which MSCs interact with other cell types in inflammatory tissue remains unclear. We investigated the role of periodontal ligament fibroblasts (PDL-Fs) in regulating the anti-inflammatory and osteogenic abilities of bone marrow-derived- (BM-) MSCs. The expression of monocyte chemotactic protein- (MCP-)1 was significantly enhanced by stimulation of PDL-Fs with inflammatory cytokines...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28166624/self-assembly-directed-aerogel-and-membrane-formation-from-a-magnetic-composite-an-approach-to-develop-multifunctional-materials
#19
Balachandran Vivek, Edamana Prasad
Herein, we report the preparation of an aerogel and a membrane from a magnetic composite material by tuning the self-assembly at the molecular level. The gel exhibits excellent oil absorption property and the membrane shows remarkable autonomous self-healing property. The composite is formed from organosilicon modified poly(amido amine) {PAMAM} dendrimer, which are linked with iron oxide nanoparticles and poly vinyl alcohol (PVA). Upon addition of a cross-linker (formaldehyde), the system undergoes a fast self-assembly and gelation process...
February 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28165294/bovine-lactoferrin-and-crohn-s-disease-a-case-study
#20
David B Alexander, Masaaki Iigo, Mohamed Abdelgied, Keiji Ozeki, Satoshi Tanida, Takashi Joh, Satoru Takahashi, Hiroyuki Tsuda
A 22-year-old male suffering from abdominal pain, repeated diarrhea, and weight loss visited the Digestive Disease Department of Nagoya City University Hospital on 19 December 2011. He was hospitalized and diagnosed with Crohn's colitis. His Crohn's Disease Activity Index (CDAI) was 415. Treatment by granulocyte apheresis, mesalazine, and adalimumab was started. His CDAI was 314 on 30 December and 215 on 5 January. A colonoscopic examination on 19 January showed almost complete remission in the transverse colon and marked remission in the rectum...
February 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
keyword
keyword
15072
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"