keyword
MENU ▼
Read by QxMD icon Read
search

biomimetic

keyword
https://www.readbyqxmd.com/read/28719198/biomimetic-platinum-promoted-polyene-polycyclizations-influence-of-alkene-substitution-and-pre-cyclization-conformations
#1
Christina McCulley, Michael J Geier, Brandi M Hudson, Michel R Gagné, Dean J Tantillo
Results of kinetic experiments and quantum chemical computations on a series of platinum-promoted polycyclization reactions are described. Analysis of these results reveal a reactivity model that reaches beyond the energetics of the cascade itself, incorporating an ensemble of pre-cyclization conformations of the platinum-alkene reactant complex, only a subset of which are productive for bi- (or larger) cyclization and lead to products. Similarities and differences between this scenario, including reaction coordinates for polycyclization, for platinum- and enzyme-promoted polycyclization are highlighted...
July 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28718622/graphene-sheet-induced-global-maturation-of-cardiomyocytes-derived-from-human-induced-pluripotent-stem-cells
#2
Jiaxian Wang, Chang Cui, Haiyan Nan, Yuanfang Yu, Yini Xiao, Ellen Poon, Gang Yang, Xijie Wang, Chenchen Wang, Lingsong Li, Kenneth Richard Boheler, Xu Ma, Xin Cheng, Zhenhua Ni, Minglong Chen
Human induced pluripotent stem cells (hiPSCs) can proliferate infinitely. Their ability to differentiate into cardiomyocytes provides abundant sources for disease modeling, drug screening and regenerative medicine. However, hiPSC-derived cardiomyocytes (hiPSC-CMs) display a low degree of maturation and fetal-like properties. Current in vitro differentiation methods do not mimic the structural, mechanical, and physiological properties of the cardiogenesis niche. Recently, we present an efficient cardiac maturation platform that combines hiPSCs monolayer cardiac differentiation with graphene substrate which is a biocompatible and superconductive material...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28717925/complex-biomembrane-mimetics-on-the-sub-nanometer-scale
#3
REVIEW
Frederick A Heberle, Georg Pabst
Biomimetic lipid vesicles are indispensable tools for gaining insight into the biophysics of cell physiology on the molecular level. The level of complexity of these model systems has steadily increased, and now spans from domain-forming lipid mixtures to asymmetric lipid bilayers. Here, we review recent progress in the development and application of elastic neutron and X-ray scattering techniques for studying these systems in situ and under physiologically relevant conditions on the nanometer to sub-nanometer length scales...
July 17, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28717790/soft-and-hard-tissue-response-%C3%A2-to-an-implant-with-a-convergent-%C3%A2-collar-in-the-esthetic-area-%C3%A2-preliminary-report-at-18-months
#4
Luigi Canullo, Marco Tallarico, Guillermo Pradies, Fabio Marinotti, Ignazio Loi, Roberto Cocchetto
AIM: The purpose of this prospective cohort study was to investigate, over an 18-month period, soft and hard tissue response to a transmucosal implant with a convergent collar inserted in the anterior maxillary esthetic area. MATERIALS AND METHODS: From June 2013 to January 2014, 14 consecutive patients were enrolled (7 men and 7 women; mean age 63.7 ± 14 years) with 20 implants, needing at least one implant-supported restoration between the canines in the maxillary anterior esthetic area...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28715858/biomimetic-nitrogen-doped-titania-nanoparticles-as-a-colorimetric-platform-for-hydrogen-peroxide-detection
#5
Muhammad Nasir, Sajid Rauf, Nawshad Muhammad, Mian Hasnain Nawaz, Aqif Anwar Chaudhry, Muhammad Hamza Malik, Shakir Ahmad Shahid, Akhtar Hayat
Nanoparticles proved a viable alternative to the already used sensing and diagnostics methods due to their low cost, good stability, easy availability and easy synthesis. In the present approach, nitrogen doped titania nanoparticles are prepared through freeze drying method, and subsequently stabilized through ionic liquid. These nanoparticles were characterized through various techniques such as X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), BET pore size and surface area analyzer, X-ray photoelectron spectroscopy (XPS) and UV-Visible diffuse reflectance spectroscopy (UV-Vis...
July 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28715202/antifouling-biomimetic-liquid-infused-stainless-steel-application-to-dairy-industrial-processing
#6
Sawsen Zouaghi, Thierry Six, Séverine Bellayer, Sona Moradi, Savvas G Hatzikiriakos, Thomas Dargent, Vincent Thomy, Yannick Coffinier, Christophe André, Guillaume Delaplace, Maude Jimenez
Fouling is a widespread and costly issue, faced by all food-processing industries. Particularly, in the dairy sector, where thermal treatments are mandatory to ensure product safety, heat-induced fouling represents up to 80% of the total production costs. Significant environmental impacts, due the massive consumption of water and energy, are also to deplore. Fouling control solutions are thus desperately needed, as they would lead to substantial financial gains, as well as tremendous progress toward eco-responsible processes...
July 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28714191/disordered-conformation-with-low-pii-helix-in-phosphoproteins-orchestrates-biomimetic-apatite-formation
#7
Melika Sarem, Steffen Lüdeke, Ralf Thomann, Pavel Salavei, Zhaoyong Zou, Wouter Habraken, Admir Masic, V Prasad Shastri
The interplay between noncollagenous proteins and biomineralization is widely accepted, yet the contribution of their secondary structure in mineral formation remains to be clarified. This study demonstrates a role for phosvitin, an intrinsically disordered phosphoprotein, in chick embryo skeletal development, and using circular dichroism and matrix least-squares Henderson-Hasselbalch global fitting, unravels three distinct pH-dependent secondary structures in phosvitin. By sequestering phosvitin on a biomimetic 3D insoluble cationic framework at defined pHs, access is gained to phosvitin in various conformational states...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28714188/energy-efficient-oil-water-separation-of-biomimetic-copper-membrane-with-multiscale-hierarchical-dendritic-structures
#8
Zhiwu Han, Bo Li, Zhengzhi Mu, Shichao Niu, Junqiu Zhang, Luquan Ren
Membrane-based materials with special surface wettability have been applied widely for the treatment of increasing industrial oily waste water, as well as frequent oil spill accidents. However, traditional technologies are energy-intensive and limited, either by fouling or by the inability of a single membrane to separate all types of oil-water mixtures. Herein, a biomimetic monolayer copper membrane (BMCM), composed of multiscale hierarchical dendritic structures, is cleverly designed and successfully fabricated on steel mesh substrate...
July 17, 2017: Small
https://www.readbyqxmd.com/read/28709067/coupling-process-study-of-lipid-production-and-mercury-bioremediation-by-biomimetic-mineralized-microalgae
#9
Yang Peng, Aosong Deng, Xun Gong, Xiaomin Li, Yang Zhang
Considering the high concentration of mercury in industrial wastewater, such as coal-fired power plants and gold mining wastewater, this research study investigated the coupling process of lipid production and mercury bioremediation using microalgae cells. Chlorella vulgaris modified by biomimetic mineralization. The cultivation was divided in two stages: a natural cultivation for 7days and 5days of Hg(2+) addition (10-100μg/L) for cultivation at different pH values (4-7) after inoculation. Next, the harvested cells were eluted, and lipid was extracted...
July 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28708324/ferrichrome-has-found-its-match-biomimetic-analogs-with-diversified-activity-map-discrete-microbial-targets
#10
Jenny Besserglick, Evgenia Olshvang, Agnieszka Szebesczyk, Joseph Englander, Dana Levinson, Yitzhak Hadar, Elzbieta Gumienna-Kontecka, Abraham Shanzer
Siderophores provide an established platform for studying molecular recognition principles in biological systems. Herein we describe the preparation of ferrichrome biomimetic analogs varying in length and polarity of the amino acid chain separating between the tripodal scaffold and the pendent FeIII chelating hydroxamic acid groups. Spectroscopic and potentiometric titrations determined their iron affinity to be within the range of efficient chelators. Microbial growth promotion and iron uptake studies were conducted on E...
July 14, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28708109/synthesis-of-poly-norbornene-methylamine-a-biomimetic-of-chitosan-by-ring-opening-metathesis-polymerization-romp
#11
Na Li, Huanhuan Wang, Xiaosai Qu, Yu Chen
ROMP is an effective method for preparing functional polymers due to its having characteristics of "living" polymerization and rapid development of catalysts. In the present work, poly(norbornene-methylamine), a mimic of chitosan, was synthesized via ROMP reaction. The amino-protected product, 5-norbornene-2-(N-methyl)-phthalimide, was prepared by a reaction of 5-norbornene-2-methylamine with phthalic anhydride, which was then subjected to the ROMP reaction in the presence of Hoveyda-Grubbs 2nd catalyst to afford poly(norbornene-(N-methyl)-phthalimide)...
July 14, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28704428/kinematic-and-biomimetic-assessment-of-a-hydraulic-ankle-foot-in-level-ground-and-camber-walking
#12
Xuefei Bai, David Ewins, Andrew D Crocombe, Wei Xu
Improved walking comfort has been linked with better bio-mimicking of the prosthetic ankle. This study investigated if a hydraulic ankle/foot can provide enough motion in both the sagittal and frontal planes during level and camber walking and if the hydraulic ankle/foot better mimics the biological ankle moment pattern compared with a fixed ankle/foot device. Five active male unilateral trans-femoral amputees performed level ground walking at normal and fast speeds and 2.5° camber walking in both directions using their own prostheses fitted with an "Echelon" hydraulic ankle/foot and an "Esprit" fixed ankle/foot...
2017: PloS One
https://www.readbyqxmd.com/read/28701072/a-novel-biomimetic-composite-substitute-of-plla-gelatin-nanofiber-membrane-for-dura-repairing
#13
Kunxue Deng, Yaya Yang, Yiquan Ke, Chengyi Luo, Man Liu, Yuting Deng, Quan Tian, Yuyu Yuan, Tun Yuan, Tao Xu
OBJECTIVE: Biomimetic design will significantly improve growth and regeneration of dural cells and tissue for better repairing effects and fewer complications in repairing the native dura. This study designed a novel composite, biomimetic substitute based on the characteristics of native dura extracellular matrix. METHODS AND RESULTS: This substitute is expected to rapidly induce cell adhesion, migration, and fast regeneration of neotissue. The material characteristics (contact angle, surface charge, and zeta potential were evaluated), in vitro biological characteristics (cell stretch, connections between cells, cell proliferation) and in vivo tissue regeneration capability of this substitute were evaluated, compared to those of collagen dura substitute, the mostly used dura substitute...
July 12, 2017: Neurological Research
https://www.readbyqxmd.com/read/28699526/hydrogel-based-cell-therapies-for-kidney-regeneration-current-trends-in-biofabrication-and-in-vivo-repair
#14
Katja Jansen, Carl C L Schuurmans, Jitske Jansen, Rosalinde Masereeuw, Tina Vermonden
Facing the problems of limited renal regeneration capacity and the persistent shortage of donor kidneys, dialysis remains the only treatment option for many end-stage renal disease patients. Unfortunately, dialysis is only a medium-term solution because large and protein-bound uremic solutes are not efficiently cleared from the body and lead to disease progression over time. Current strategies for improved renal replacement therapies (RRTs) range from whole organ engineering to biofabrication of renal assist devices and biological injectables for in vivo regeneration...
July 10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28698817/the-fabrication-of-biomimetic-biphasic-can-pac-hydrogel-with-a-seamless-interfacial-layer-applied-in-osteochondral-defect-repair
#15
Jinfeng Liao, Taoran Tian, Sirong Shi, Xueping Xie, Quanquan Ma, Guo Li, Yunfeng Lin
Cartilage tissue engineering based on biomimetic scaffolds has become a rapidly developing strategy for repairing cartilage defects. In this study, a biphasic CAN-PAC hydrogel for osteochondral defect (OCD) regeneration was fabricated based on the density difference between the two layers via a thermally reactive, rapid cross-linking method. The upper hydrogel was cross-linked by CSMA and NIPAm, and the lower hydrogel was composed of PECDA, AAm and PEGDA. The interface between the two layers was first grafted by the physical cross-linking of calcium gluconate and alginate, followed by the chemical cross-linking of the carbon-carbon double bonds in the other components...
2017: Bone Research
https://www.readbyqxmd.com/read/28696337/memristive-device-based-learning-for-navigation-in-robots
#16
Mohammad Sarim, Manish Kumar, Rashmi Jha, Ali A Minai
Biomimetic robots have gained attention recently for various applications ranging from resource hunting to search and rescue operations during disasters. Biological species are known to intuitively learn from the environment, gather and process data, and make appropriate decisions. Such sophisticated computing capabilities in robots are difficult to achieve, especially if done in real-time with ultra- low energy consumption. Here, we present a novel memristive device based learning architecture for robots. Two terminal memristive devices with resistive switching of oxide layer are modeled in a crossbar array to develop a neuromorphic platform that can impart active real-time learning capabilities in a robot...
July 11, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28696330/artificial-insect-wings-with-biomimetic-wing-morphology-and-mechanical-properties
#17
Zhiwei Liu, Xiaojun Yan, Mingjing Qi, Yangsheng Zhu, Dawei Huang, X Y Zhang, Liwei Lin
The pursuit of high lift force for insect-scale Flapping-wing Micro Aerial Vehicle (FMAV) requires its artificial wings to own biomimetic wing features which are close to its nature counterpart. In this work, we present both fabrication and testing methods for artificial insect wings with biomimetic wing morphology and mechanical properties. The artificial cicada (Hyalessa maculaticollis) wing is fabricated through high precision laser cutting technique and bonding process of multilayer materials. Through controlling the shape of wing venation, the fabrication method can achieve 3-D (three dimensional) wing architecture including cambers or corrugations...
July 11, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28695800/application-of-recombinant-collagen-type-%C3%A2-combined-with-polyaspartic-acid-in-biomimetic-biomineralization
#18
Zhan Zhang, Chun Zhang, Qiaofeng Guo, Gouping Ma, Lifeng Shen, Huajun Yu, Bingyuan Lin, Ning Lu, Kai Huang
Objective To prepare biomimetic bone material by reconstructing type Ⅰ collagen combined with polyaspartic acid. Methods By acid hydrolysis,rat tail type Ⅰ collagen was decomposed into collagen fibers,which were then placed in the calcium phosphate mineralization solution. Under the cross-linking of glutaraldehyde,the collagen fibers were reconstructed and assembled into collagen fibers,and the calcium phosphate crystals were wrapped in the inner side of the collagen fibers for biomineralizationin. After poly aspartate acid was added,calcium hydroxyapatite calcium precursor was added into the collagen fibers to simulate thebiomimetic biomineralizationin the human body...
June 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28691387/cascades-in-compartments-en-route-to-machine-assisted-biotechnology
#19
Kersten S Rabe, Joachim Müller, Marc Skoupi, Christof M Niemeyer
Biological compartmentalization is a fundamental principle of life that allows cells to metabolize, propagate or communicate with their environment. Much research is devoted to the understanding of this basic principle and to harness biomimetic compartments and catalytic cascades as tools for technological processes. We summarize the current state-of-the-art of these developments with a special emphasis on length scales, mass transport phenomena and molecular scaffolding approaches, ranging from small crosslinkers over proteins and nucleic acids to colloids and patterned surfaces...
July 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28691092/instant-tough-bonding-of-hydrogels-for-soft-machines-and-electronics
#20
Daniela Wirthl, Robert Pichler, Michael Drack, Gerald Kettlguber, Richard Moser, Robert Gerstmayr, Florian Hartmann, Elke Bradt, Rainer Kaltseis, Christian M Siket, Stefan E Schausberger, Sabine Hild, Siegfried Bauer, Martin Kaltenbrunner
Introducing methods for instant tough bonding between hydrogels and antagonistic materials-from soft to hard-allows us to demonstrate elastic yet tough biomimetic devices and machines with a high level of complexity. Tough hydrogels strongly attach, within seconds, to plastics, elastomers, leather, bone, and metals, reaching unprecedented interfacial toughness exceeding 2000 J/m(2). Healing of severed ionic hydrogel conductors becomes feasible and restores function instantly. Soft, transparent multilayered hybrids of elastomers and ionic hydrogels endure biaxial strain with more than 2000% increase in area, facilitating soft transducers, generators, and adaptive lenses...
June 2017: Science Advances
keyword
keyword
100196
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"