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https://www.readbyqxmd.com/read/28994574/ultra-low-friction-self-lubricating-nanocomposites-with-mesoporous-metal-organic-frameworks-as-smart-nanocontainer-for-lubricants
#1
Guoliang Zhang, Guoxin Xie, Lina Si, Shizhu Wen, Dan Guo
Smart nanocontainers with stimuli-responsive property can be used to fabricate a new kind of self-lubricating nanocomposite, while the practical potential of the metal-organic frameworks (MOFs) as nanocontainers for lubricants has not been realized. In this work, mesoporous Cu-BTC MOFs storing oleylamine nanocomposites were explored from synthesis and microstructure to self-lubricating characterization. The stress stimuli-responsive of the Cu-BTC storing oleylamine (Cu-BTCO) on the lubrication behavior has been investigated by subjecting it to macroscopic ball-on-disc friction tests...
October 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28994501/decoupled-thermo-and-ph-responsive-hydrogel-microspheres-cross-linked-by-rotaxane-networks
#2
Takuma Kureha, Daichi Aoki, Seina Hiroshige, Keisuke Iijima, Daisuke Aoki, Toshikazu Takata, Daisuke Suzuki
Rotaxane cross-linked (RC) microgels that exhibit a decoupled thermo- and pH-responsive volume transition were developed. The pH-induced changes of the aggregation/disaggregation states of cyclodextrin in the RC networks were used to control the swelling capacity of the entire microgels. Different from conventional thermo- and pH-responsive microgels, which are usually obtained from copolymerizations involving charged monomers, the RC microgels respond to temperature as intended, even in the presence of charged functional molecules such as dyes in the microgel dispersion...
October 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28976838/bulk-fill-composites-effectiveness-of-cure-with-poly-and-monowave-curing-lights-and-modes
#3
J K Gan, A U Yap, J W Cheong, N Arista, Cbk Tan
This study compared the effectiveness of cure of bulk-fill composites using polywave light-emitting diode (LED; with various curing modes), monowave LED, and conventional halogen curing lights. The bulk-fill composites evaluated were Tetric N-Ceram bulk-fill (TNC), which contained a novel germanium photoinitiator (Ivocerin), and Smart Dentin Replacement (SDR). The composites were placed into black polyvinyl molds with cylindrical recesses of 4-mm height and 3-mm diameter and photopolymerized as follows: Bluephase N Polywave High (NH), 1200 mW/cm(2) (10 seconds); Bluephase N Polywave Low (NL), 650 mW/cm(2) (18...
October 4, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28975813/insulin-loaded-plga-microspheres-for-glucose-responsive-release
#4
Jun-Zi Wu, Gareth R Williams, He-Yu Li, Dong-Xiu Wang, Shu-De Li, Li-Min Zhu
Porous poly(lactic-co-glycolic acid) (PLGA) microspheres were prepared, loaded with insulin, and then coated in poly(vinyl alcohol) (PVA) and a novel boronic acid-containing copolymer [poly(acrylamide phenyl boronic acid-co-N-vinylcaprolactam); p(AAPBA-co-NVCL)]. Multilayer microspheres were generated using a layer-by-layer approach depositing alternating coats of PVA and p(AAPBA-co-NVCL) on the PLGA surface, with the optimal system found to be that with eight alternating layers of each coating. The resultant material comprised spherical particles with a porous PLGA core and the pores covered in the coating layers...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28948699/screening-for-trauma-related-symptoms-via-a-smartphone-app-the-validity-of-smart-assessment-on-your-mobile-in-referred-police-officers
#5
Christianne A I van der Meer, Anne Bakker, Bart A L Schrieken, Marthe C Hoofwijk, Miranda Olff
To facilitate easily accessible screening for trauma-related symptoms, a web-based application called Smart Assessment on your Mobile (SAM) was developed. In this study, we examined whether SAM was able to accurately identify posttraumatic stress disorder (PTSD) and depression in adults. Eighty-nine referred police officers completed SAM, containing the PTSD Checklist for Diagnostic and Statistical Manual of Mental Disorders (DSM)-5 (PCL-5) and the Depression Anxiety and Stress Scale (DASS-21), on their own device prior to a diagnostic interview where the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) and Structured Clinical Interview for DSM-IV (SCID-I/P) were administered...
September 2017: International Journal of Methods in Psychiatric Research
https://www.readbyqxmd.com/read/28945574/smart-and-fragrant-garment-via-surface-modification-of-cotton-fabric-with-cinnamon-oil-stimuli-responsive-pnipaam-chitosan-nano-hydrogels
#6
Azadeh Bashari, Nahid Hemmatinejad, Ali Pourjavadi
This paper deals with obtaining aromatherapic textiles via applying stimuli-responsive poly N-isopropyl acryl amide (PNIPAAm) /chitosan (PNCS) nano hydrogels containing cinnamon oil on cotton fabric and looks into the treated fabric characteristics as an antibacterial and temperature/pH responsive fabric. The semi-batch surfactant-free dispersion polymerization method was proposed to the synthesis of PNCS nano particles. The incorporation of modified β -cyclodextrin ( β -CD) into the PNCS nanohydrogel was performed in order to prepare a hydrophobic(cinnamon oil) carrier embedded in stimuli-responsive nanohydrogel...
September 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28945337/nanocontainer-enhanced-self-healing-for-corrosion-resistant-ni-coating-on-mg-alloy
#7
Zhi-Hui Xie, Dan Li, Zakiya Skeete, Anju Sharma, Chuan-Jian Zhong
The ability to manipulate the functionalization of Ni coating is of great importance in improving the corrosion resistance of magnesium (Mg) alloy for many industrial applications. In the present work, MCM-41 type mesoporous silica nanocontainers (MSNs) loaded with corrosion inhibitor (NaF) were synthesized and employed as smart reinforcements to enhance the integrity and corrosion inhibition of the Ni coating. The incorporation of the F-loaded MSNs (F@MSNs) to enhance the corrosion resistant capacity of a metallic coating is reported for the first time...
October 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28934159/rosa-resource-oriented-service-management-schemes-for-web-of-things-in-a-smart-home
#8
Chun-Feng Liao, Peng-Yu Chen
A Pervasive-computing-enriched smart home environment, which contains many embedded and tiny intelligent devices and sensors coordinated by service management mechanisms, is capable of anticipating intentions of occupants and providing appropriate services accordingly. Although there are a wealth of research achievements in recent years, the degree of market acceptance is still low. The main reason is that most of the devices and services in such environments depend on particular platform or technology, making it hard to develop an application by composing the devices or services...
September 21, 2017: Sensors
https://www.readbyqxmd.com/read/28930338/biomedical-nanomotors-efficient-glucose-mediated-insulin-release
#9
Paula Díez, Berta Esteban-Fernández de Ávila, Doris E Ramírez-Herrera, Reynaldo Villalonga, Joseph Wang
We report herein the design of an autonomous glucose-responsive smart nanomachine for insulin (In) delivery based on ultrasound (US)-propelled nanomotors combined with an enzyme-based sensing-effector unit. Gold nanowire (AuNW) motors have been coupled with a mesoporous silica (MS) segment, which was gated with pH-responsive phenylboronic acid (PBA)-glucose oxidase (GOx) supramolecular nanovalves responsible for the insulin release. Glucose-induced protonation of the PBA groups triggers the opening of the pH-driven gate and uncapping of the insulin-loaded nanovalves...
October 5, 2017: Nanoscale
https://www.readbyqxmd.com/read/28930263/salicylate-poisoning-potential-of-topical-pain-relief-agents-from-age-old-remedies-to-engineered-smart-patches
#10
REVIEW
Ashleigh Anderson, Aaron McConville, Laura Fanthorpe, James Davis
The pain relief capabilities of methyl salicylate are well established and a multitude of over-the-counter products populate pharmacy shelves. Over-application of the topical preparation containing the drug, or its accidental ingestion, invariably result in salicylate poisoning and in severe cases can be fatal. The drug has been a regular feature of the US National Poison Database Survey over the past decade and continues to pose a risk to children and adults alike. The aim of the review has been to cast a spotlight on the drug and assess why its use remains problematic, how technology could offer more efficacious delivery regimes, and minimise the possibility of accidental or intentional misuse...
June 30, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28927933/azopolymer-photopatterning-for-directional-control-of-angiogenesis
#11
Chiara Fedele, Maria De Gregorio, Paolo A Netti, Silvia Cavalli, Chiara Attanasio
Understanding cellular behavior in response to microenvironmental stimuli is central to tissue engineering. An increasing number of reports emphasize the high sensitivity of cells to the physical characteristics of the surrounding milieu and in particular, topographical cues. In this work, we investigated the influence of dynamic topographic signal presentation on sprout formation and the possibility to obtain a space-time control over sprouting directionality without growth factors, in order to investigate the contribution of just topography in the angiogenic process...
September 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28927597/active-and-smart-biodegradable-packaging-based-on-starch-and-natural-extracts
#12
Carolina Medina-Jaramillo, Oswaldo Ochoa-Yepes, Celina Bernal, Lucía Famá
Active and smart biodegradable films from cassava starch and glycerol with 5wt.% of different natural extracts such as green tea and basil were obtained by casting. Their functional capacity as antioxidants and their physicochemical properties achieved from the incorporation of these types of extracts were evaluated. The content of phenolic compounds in the extracts led to films with significant antioxidant activity, being greater in the case of the system containing green tea extract. Color changes in both materials after immersion in different media (acid and basic) due to the presence of chlorophyll and carotenoids in the extracts were observed, but the film with basil extract reacted most notably to the different pH...
November 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28912239/dna-sequence-directed-shape-change-of-photopatterned-hydrogels-via-high-degree-swelling
#13
Angelo Cangialosi, ChangKyu Yoon, Jiayu Liu, Qi Huang, Jingkai Guo, Thao D Nguyen, David H Gracias, Rebecca Schulman
Shape-changing hydrogels that can bend, twist, or actuate in response to external stimuli are critical to soft robots, programmable matter, and smart medicine. Shape change in hydrogels has been induced by global cues, including temperature, light, or pH. Here we demonstrate that specific DNA molecules can induce 100-fold volumetric hydrogel expansion by successive extension of cross-links. We photopattern up to centimeter-sized gels containing multiple domains that undergo different shape changes in response to different DNA sequences...
September 15, 2017: Science
https://www.readbyqxmd.com/read/28904834/methionine-mediated-synthesis-of-magnetic-nanoparticles-and-functionalization-with-gold-quantum-dots-for-theranostic-applications
#14
Arūnas Jagminas, Agnė Mikalauskaitė, Vitalijus Karabanovas, Jūrate Vaičiūnienė
Biocompatible superparamagnetic iron oxide nanoparticles (NPs) through smart chemical functionalization of their surface with fluorescent species, therapeutic proteins, antibiotics, and aptamers offer remarkable potential for diagnosis and therapy of disease sites at their initial stage of growth. Such NPs can be obtained by the creation of proper linkers between magnetic NP and fluorescent or drug probes. One of these linkers is gold, because it is chemically stable, nontoxic and capable to link various biomolecules...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28893998/engineering-a-light-activated-caspase-3-for-precise-ablation-of-neurons-in-vivo
#15
Ashley D Smart, Roland A Pache, Nathan D Thomsen, Tanja Kortemme, Graeme W Davis, James A Wells
The circuitry of the brain is characterized by cell heterogeneity, sprawling cellular anatomy, and astonishingly complex patterns of connectivity. Determining how complex neural circuits control behavior is a major challenge that is often approached using surgical, chemical, or transgenic approaches to ablate neurons. However, all these approaches suffer from a lack of precise spatial and temporal control. This drawback would be overcome if cellular ablation could be controlled with light. Cells are naturally and cleanly ablated through apoptosis due to the terminal activation of caspases...
September 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28893083/tissue-engineering-of-urethra-systematic-review-of-recent-literature
#16
Stanislav Žiaran, Martina Galambošová, L'uboš Danišovič
The purpose of this article was to perform a systematic review of the recent literature on urethral tissue engineering. A total of 31 articles describing the use of tissue engineering for urethra reconstruction were included. The obtained results were discussed in three groups: cells, scaffolds, and clinical results of urethral reconstructions using these components. Stem cells of different origin were used in many experimental studies, but only autologous urothelial cells, fibroblasts, and keratinocytes were applied in clinical trials...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28885839/co2-stimuli-responsive-injectable-block-copolymer-hydrogels-cross-linked-by-discrete-organoplatinum-ii-metallacycles-via-stepwise-post-assembly-polymerization
#17
Wei Zheng, Guang Yang, Nannan Shao, Li-Jun Chen, Bo Ou, Shu-Ting Jiang, Guosong Chen, Hai-Bo Yang
Supramolecular polymeric gels cross-linked by well-defined, discrete metal-organic macrocycles (MOMs) or metal-organic cages have become a prevailing topic within the field of supramolecular self-assembly. However, the realization of supramolecular polymeric hydrogels cross-linked by discrete organometallic architectures with good biocompatibility is still a great challenge. Herein, we present the successful preparation of CO2 stimuli-responsive, injectable block copolymer hydrogels cross-linked by discrete organoplatinum(II) metallacycles...
September 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28881458/functional-hyper-crosslinkers
#18
Ning Zhou, Zeyuan Cao, Bing Xu
Crosslinking is an essential architecture for polymers to improve mechanical and thermal properties and to form three-dimensional (3D) structures. Although conventional synthetic crosslinkers usually only serve as bridges between different polymeric chains, biological crosslinkers are multifunctional. Recently, crosslinkers with active functionality after polymerization are promising a new dimension of molecular design for generating smart materials as they may exhibit dramatic changes in structures and properties in response to external stimuli...
September 7, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28877434/reduction-responsive-polypeptide-micelles-for-intracellular-delivery-of-antineoplastic-agent
#19
Weiguo Xu, Jianxun Ding, Xuesi Chen
Reduction-responsive methoxy poly(ethylene glycol)-block-poly(S-tert-butylmercapto-L-cysteine) copolymers (i.e., mPEG113-b-PBMLC4 and mPEG113-b-PBMLC9) were facilely synthesized through primary amino-initiated ring-opening polymerization (ROP) of disulfide-containing N-carboxyanhydride monomer. The reduction-responsive block copolymers were then investigated for intracellular delivery of antitumor drug after forming smart micelles in vitro and in vivo. The micelles were denoted as P4M and P9M, respectively...
September 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28873801/quantitative-indicators-for-behaviour-drift-detection-from-home-automation-data
#20
Fabio Veronese, Andrea Masciadri, Sara Comai, Matteo Matteucci, Fabio Salice
Smart Homes diffusion provides an opportunity to implement elderly monitoring, extending seniors' independence and avoiding unnecessary assistance costs. Information concerning the inhabitant behaviour is contained in home automation data, and can be extracted by means of quantitative indicators. The application of such approach proves it can evidence behaviour changes.
2017: Studies in Health Technology and Informatics
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