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https://www.readbyqxmd.com/read/29470444/identification-and-evaluation-of-cytotoxicity-of-peptide-liposome-incorporated-citron-extracts-in-an-in-vitro-system
#1
Xiaowei Zhang, Hee Jeong Yoon, Min Gyeong Kang, Gyeong Jin Kim, Sun Young Shin, Sang Hong Baek, Jung Gyu Lee, Jingjing Bai, Sang Yoon Lee, Mi Jung Choi, Kwonho Hong, Hojae Bae
Abstract : Citrons have been widely used for medicinal purposes for a long time, but the application of citron in the food industry is still restricted. The extensive advantages of nanotechnology in the food industry have greatly broadened the application of foods. In this study, by employing nanotechnology, we prepared citron-extract nanoparticle with an average size of 174.11 ± 3.89 nm, containing protein peptide and/or liposome. In order to evaluate the toxicity of nanoparticles and to ensure food safety, biological cytotoxicity at the cell and genomic levels was also identified to examine the toxicity of citron extracts by using an in vitro system...
February 22, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29461795/nanoengineered-ionic-covalent-entanglement-nice-bioinks-for-3d-bioprinting
#2
David Chimene, Charles W Peak, James Gentry, James K Carrow, Lauren M Cross, Eli Mondragon, Guinea B C Cardoso, Roland Kaunas, Akhilesh K Gaharwar
We introduce an enhanced nanoengineered ionic covalent entanglement (NICE) bioink for the fabrication of mechanically stiff and elastomeric 3D biostructures. NICE bioink formulations combine nanocomposite and ionic covalent entanglement (ICE) strengthening mechanisms to print customizable cell-laden constructs for tissue engineering with high structural fidelity and mechanical stiffness. Nanocomposite and ICE strengthening mechanisms complement each other through their synergistic interactions, improving mechanical strength, elasticity, toughness, and flow properties beyond the sum of the effects of both reinforcement techniques alone...
February 20, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29446777/very-high-commutation-quality-factor-and-dielectric-tunability-in-nanocomposite-srtio-3-thin-films-with-t-c-enhanced-to-300-%C3%A2-c
#3
Abhijeet L Sangle, Oon Jew Lee, Ahmed Kursumovic, Wenrui Zhang, Aiping Chen, Haiyan Wang, Judith L MacManus-Driscoll
We report on nanoengineered SrTiO 3 -Sm 2 O 3 nanocomposite thin films with the highest reported values of commutation quality factor (CQF or K-factor) of >2800 in SrTiO 3 at room temperature. The films also had a large tunability of dielectric constant (49%), low tangent loss (tan δ = 0.01) and a Curie temperature for SrTiO 3 > 300 °C, making them very attractive for tunable RF applications. The enhanced properties originate from the unique nanostructure in the films, with <20 nm diameter strain-controlling Sm 2 O 3 nanocolumns embedded in a SrTiO 3 matrix...
February 15, 2018: Nanoscale
https://www.readbyqxmd.com/read/29430838/porous-carbon-hosted-atomically-dispersed-iron-nitrogen-moiety-as-enhanced-electrocatalysts-for-oxygen-reduction-reaction-in-a-wide-range-of-ph
#4
Shaofang Fu, Chengzhou Zhu, Dong Su, Junhua Song, Siyu Yao, Shuo Feng, Mark H Engelhard, Dan Du, Yuehe Lin
As one of the alternatives to replace precious metal catalysts, transition-metal-nitrogen-carbon (M-N-C) electrocatalysts have attracted great research interest due to their low cost and good catalytic activities. Despite nanostructured M-N-C catalysts can achieve good electrochemical performances, they are vulnerable to aggregation and insufficient catalytic sites upon continuous catalytic reaction. In this work, metal-organic frameworks derived porous single-atom electrocatalysts (SAEs) were successfully prepared by simple pyrolysis procedure without any further posttreatment...
February 12, 2018: Small
https://www.readbyqxmd.com/read/29430735/reassembly-of-89-zr-labeled-cancer-cell-membranes-into-multicompartment-membrane-derived-liposomes-for-pet-trackable-tumor-targeted-theranostics
#5
Bo Yu, Shreya Goel, Dalong Ni, Paul A Ellison, Cerise M Siamof, Dawei Jiang, Liang Cheng, Lei Kang, Faquan Yu, Zhuang Liu, Todd E Barnhart, Qianjun He, Han Zhang, Weibo Cai
Nanoengineering of cell membranes holds great potential to revolutionize tumor-targeted theranostics, owing to their innate biocompatibility and ability to escape from the immune and reticuloendothelial systems. However, tailoring and integrating cell membranes with drug and imaging agents into one versatile nanoparticle are still challenging. Here, multicompartment membrane-derived liposomes (MCLs) are developed by reassembling cancer cell membranes with Tween-80, and are used to conjugate 89 Zr via deferoxamine chelator and load tetrakis(4-carboxyphenyl) porphyrin for in vivo noninvasive quantitative tracing by positron emission tomography imaging and photodynamic therapy (PDT), respectively...
February 12, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29425720/nanoengineered-injectable-hydrogels-from-kappa-carrageenan-and-two-dimensional-nanosilicates-for-wound-healing-application
#6
Giriraj Lokhande, James K Carrow, Teena Thakur, Janet R Xavier, Madasamy Parani, Kayla J Bayless, Akhilesh K Gaharwar
We report injectable nanoengineered hemostats for enhanced wound healing and tissue regeneration. The nanoengineered system consists of the natural polysaccharide, κ-carrageenan (κCA), loaded with bioactive two-dimensional (2D) nanosilicates. Nanoengineered hydrogels showed shear-thinning characteristics and can be injected for a minimally invasive approach. The hydrogel can be physically crosslinked in presence of monovalent ions and result in mechanically strong hydrogels. By controlling the ratio between κCA and nanosilicates, compressive stiffness of nanoengineered hydrogels can be modulated between 20 to 200kPa...
February 6, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29410983/nanotopography-regulates-motor-neuron-differentiation-of-human-pluripotent-stem-cells
#7
Weiqiang Chen, Shuo Han, Weiyi Qian, Shinuo Weng, Haiou Yang, Yubing Sun, Luis G Villa-Diaz, Paul H Krebsbach, Jianping Fu
The regulation of human pluripotent stem cell (hPSC) behaviors has been mainly studied through exploration of biochemical factors. However, the current directed differentiation protocols for hPSCs that completely rely on biochemical factors remain suboptimal. It has recently become evident that coexisting biophysical signals in the stem cell microenvironment, including nanotopographic cues, can provide potent regulatory signals to mediate adult stem cell behaviors, including self-renewal and differentiation...
February 7, 2018: Nanoscale
https://www.readbyqxmd.com/read/29350489/bioderived-dna-nanomachines-for-potential-uses-in-biosensing-diagnostics-and-therapeutic-applications
#8
REVIEW
Chava Angell, Mingxuan Kai, Sibai Xie, Xiangyi Dong, Yi Chen
Beside its genomic properties, DNA is also recognized as a novel material in the field of nanoengineering. The specific bonding of base pairs can be used to direct the assembly of highly structured materials with specific nanoscale features such as periodic 2D arrays, 3D nanostructures, assembly of nanomaterials, and DNA nanomachines. In recent years, a variety of DNA nanomachines are developed because of their many potential applications in biosensing, diagnostics, and therapeutic applications. In this review, the fuel-powered motors and secondary structure motors, whose working mechanisms are inspired or derived from natural phenomena and nanomachines, are discussed...
January 19, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29337096/fabrication-and-characterization-of-nanoengineered-biocompatible-n-ha-chitosan-tamarind-seed-polysaccharide-bio-inspired-nanocomposites-for-bone-tissue-engineering
#9
Mohammad Shakir, Iram Zia, Abdur Rehman, Rizwan Ullah
In this communication we describe the fabrication of nano-hydroxyapatite/chitosan-tamarind seed polysaccharide (n-HA/CS-TSP) nanocomposite with a weight ratio of 70/20/10, 70/15/15 and 70/10/20, respectively through a co-precipitation method. A comparative assessment of the properties of n-HA/CS-TSP and n-HA/CS nanocomposites was done by FT-IR, SEM-EDX, TEM, TGA/DTA, XRD and mechanical testing. The results suggested strong chemical interactions between the three components, decreased particle size and homogeneous dispersion of n-HA particles in n-HA/CS-TSP as compared to n-HA/CS...
January 11, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29330458/architecture-of-a-mammalian-glomerular-domain-revealed-by-novel-volume-electroporation-using-nanoengineered-microelectrodes
#10
D Schwarz, M Kollo, C Bosch, C Feinauer, I Whiteley, T W Margrie, T Cutforth, A T Schaefer
Dense microcircuit reconstruction techniques have begun to provide ultrafine insight into the architecture of small-scale networks. However, identifying the totality of cells belonging to such neuronal modules, the "inputs" and "outputs," remains a major challenge. Here, we present the development of nanoengineered electroporation microelectrodes (NEMs) for comprehensive manipulation of a substantial volume of neuronal tissue. Combining finite element modeling and focused ion beam milling, NEMs permit substantially higher stimulation intensities compared to conventional glass capillaries, allowing for larger volumes configurable to the geometry of the target circuit...
January 12, 2018: Nature Communications
https://www.readbyqxmd.com/read/29318400/sensitive-nonenzymatic-electrochemical-glucose-detection-based-on-hollow-porous-nio
#11
Gege He, Liangliang Tian, Yanhua Cai, Shenping Wu, Yongyao Su, Hengqing Yan, Wanrong Pu, Jinkun Zhang, Lu Li
Transition metal oxides (TMOs) have attracted extensive research attentions as promising electrocatalytic materials. Despite low cost and high stability, the electrocatalytic activity of TMOs still cannot satisfy the requirements of applications. Inspired by kinetics, the design of hollow porous structure is considered as a promising strategy to achieve superior electrocatalytic performance. In this work, cubic NiO hollow porous architecture (NiO HPA) was constructed through coordinating etching and precipitating (CEP) principle followed by post calcination...
January 9, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29281244/high-density-lipoprotein-nanobiologics-for-precision-medicine
#12
Willem J M Mulder, Mandy M T van Leent, Marnix Lameijer, Edward A Fisher, Zahi A Fayad, Carlos Pérez-Medina
Nature is an inspirational source for biomedical engineering developments. Particularly, numerous nanotechnological approaches have been derived from biological concepts. For example, among many different biological nanosized materials, viruses have been extensively studied and utilized, while exosome research has gained much traction in the 21st century. In our body, fat is transported by lipoproteins, intriguing supramolecular nanostructures that have important roles in cell function, lipid metabolism, and disease...
December 27, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29244713/nanoengineered-interfaces-coatings-and-structures-by-plasma-techniques
#13
EDITORIAL
Krasimir Vasilev, Melanie Macgregor Ramiasa
Nanoparticles, nanotubes, nanobelts, nanoneedles, nanosheets, nanowires, nanopillars: the variety of nanostructured interfaces that can be created and modified using plasma processes is virtually endless.[...].
December 15, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29235876/suppressing-polysulfide-dissolution-via-cohesive-forces-by-interwoven-carbon-nanofibers-for-high-areal-capacity-lithium-sulfur-batteries
#14
Jong Hyuk Yun, Joo-Hyung Kim, Do Kyung Kim, Hyun-Wook Lee
Nanostructural design renders several breakthroughs for the construction of high-performance materials and devices, including energy-storage systems. Although attempts made toward electrode engineering have improved the existing drawbacks, nanoengineering is still hindered by some issues. To achieve practical applications of lithium-sulfur (Li-S) batteries, it is difficult to attain a high areal capacity with stable cycling. Physical encapsulation via nanostructural design not only can resolve the issue of lithium polysulfide dissolution during the electrochemical cycling but also can offer significant contact resistance, which in turn can decrease the kinetics, particularly at a high sulfur loading...
December 13, 2017: Nano Letters
https://www.readbyqxmd.com/read/29214803/shear-thinning-and-thermo-reversible-nanoengineered-inks-for-3d-bioprinting
#15
Scott A Wilson, Lauren M Cross, Charles W Peak, Akhilesh K Gaharwar
Three-dimensional (3D) printing is an emerging approach for rapid fabrication of complex tissue structures using cell-loaded bioinks. However, 3D bioprinting has hit a bottleneck in progress because of the lack of suitable bioinks that are printable, have high shape fidelity, and are mechanically resilient. In this study, we introduce a new family of nanoengineered bioinks consisting of kappa-carrageenan (κCA) and two-dimensional (2D) nanosilicates (nSi). κCA is a biocompatible, linear, sulfated polysaccharide derived from red algae and can undergo thermo-reversible and ionic gelation...
December 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29190479/recent-progress-on-semiconducting-polymer-nanoparticles-for-molecular-imaging-and-cancer-phototherapy
#16
REVIEW
Jingchao Li, Jianghong Rao, Kanyi Pu
As a new class of organic optical nanomaterials, semiconducting polymer nanoparticles (SPNs) have the advantages of excellent optical properties, high photostability, facile surface functionalization, and are considered to possess good biocompatibility for biomedical applications. This review surveys recent progress made on the design and synthesis of SPNs for molecular imaging and cancer phototherapy. A variety of novel polymer design, chemical modification and nanoengineering strategies have been developed to precisely tune up optoelectronic properties of SPNs to enable fluorescence, chemiluminescence and photoacoustic (PA) imaging in living animals...
November 21, 2017: Biomaterials
https://www.readbyqxmd.com/read/29164226/nicking-enzyme-controlled-toehold-regulation-for-dna-logic-circuits
#17
Linqiang Pan, Zhiyu Wang, Yifan Li, Fei Xu, Qiang Zhang, Cheng Zhang
DNA strand displacement is widely used in DNA-related nanoengineering for its remarkable specificity and predictability. We report a nicking enzyme-assisted mechanism to regulate strand displacement, where DNA toeholds are dynamically controlled. To demonstrate the strategy, a protein/DNA-based Boolean operation system is constructed and based on it a two-channel multiplexer controlled by three different nicking enzymes is realized. The proposed regulatory mechanism can be used for switch logic statement and bridges protein and DNA logic circuits...
November 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/29156422/syndecan-1-in-mechanosensing-of-nanotopological-cues-in-engineered-materials
#18
Victoria Le, Jason Lee, Somali Chaterji, Adrianne Spencer, Yen-Liang Liu, Peter Kim, Hsin-Chih Yeh, Deok-Ho Kim, Aaron B Baker
The cells of the vascular system are highly sensitive to biophysical cues from their local cellular microenvironment. To engineer improved materials for vascular devices and delivery of cell therapies, a key challenge is to understand the mechanisms that cells use to sense biophysical cues from their environment. Syndecans are heparan sulfate proteoglycans (HSPGs) that consist of a protein core modified with heparan sulfate glycosaminoglycan chains. Due to their presence on the cell surface and their interaction with cytoskeletal and focal adhesion associated molecules, cell surface proteoglycans are well poised to serve as mechanosensors of the cellular microenvironment...
November 9, 2017: Biomaterials
https://www.readbyqxmd.com/read/29120396/materials-for-wind-turbine-blades-an-overview
#19
REVIEW
Leon Mishnaevsky, Kim Branner, Helga Nørgaard Petersen, Justine Beauson, Malcolm McGugan, Bent F Sørensen
A short overview of composite materials for wind turbine applications is presented here. Requirements toward the wind turbine materials, loads, as well as available materials are reviewed. Apart from the traditional composites for wind turbine blades (glass fibers/epoxy matrix composites), natural composites, hybrid and nanoengineered composites are discussed. Manufacturing technologies for wind turbine composites, as well their testing and modelling approaches are reviewed.
November 9, 2017: Materials
https://www.readbyqxmd.com/read/29117138/computational-modelling-of-materials-for-wind-turbine-blades-selected-dtu-wind-energy-activities
#20
REVIEW
Lars Pilgaard Mikkelsen, Leon Mishnaevsky
Computational and analytical studies of degradation of wind turbine blade materials at the macro-, micro-, and nanoscale carried out by the modelling team of the Section Composites and Materials Mechanics, Department of Wind Energy, DTU, are reviewed. Examples of the analysis of the microstructural effects on the strength and fatigue life of composites are shown. Computational studies of degradation mechanisms of wind blade composites under tensile and compressive loading are presented. The effect of hybrid and nanoengineered structures on the performance of the composite was studied in computational experiments as well...
November 8, 2017: Materials
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