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https://www.readbyqxmd.com/read/28510430/nanoarchitecturing-of-natural-melanin-nanospheres-by-layer-by-layer-assembly-macroscale-anti-inflammatory-conductive-coatings-with-optoelectronic-tunability
#1
Taesik Eom, Kyungbae Woo, Whirang Cho, Jaeeun Heo, Daseul Jang, Jae In Shin, David Charles Martin, Jeong Jae Wie, Bong Sup Shim
Natural melanins are biocompatible conductors with versatile functionalities. Here, we report fabrication of multifunctional poly(vinyl alcohol)/melanin nanocomposites by layer-by-layer (LBL) assembly using melanin nanoparticles (MNPs) directly extracted from sepia officinalis inks. The LBL assembly offers facile manipulation of nanotextures as well as nm-thickness control of the macroscale film by varying solvent qualities. The time-resolved absorption was monitored during the process and quantitatively studied by fractal dimension and lacunarity analysis...
May 16, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28499298/-cochlear-implant-state-of-the-art
#2
Thomas Lenarz
Cochlear implants are the treatment of choice for the auditory rehabilitation of patients with sensory deafness. They restore the missing function of inner hair cells by transforming the acoustic signal into electrical stimuli for activation of auditory nerve fibers. Due to the very fast technology development cochlear implants provide open-set speech understanding in the majority of patients including the use of the telephone. Children can achieve a near to normal speech and language development provided their deafness is detected early after onset and implantation is performed quickly thereafter...
April 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28498093/cardiac-tissue-engineering-from-matrix-design-to-the-engineering-of-bionic-hearts
#3
Sharon Fleischer, Ron Feiner, Tal Dvir
The field of cardiac tissue engineering aims at replacing the scar tissue created after a patient has suffered from a myocardial infarction. Various technologies have been developed toward fabricating a functional engineered tissue that closely resembles that of the native heart. While the field continues to grow and techniques for better tissue fabrication continue to emerge, several hurdles still remain to be overcome. In this review we will focus on several key advances and recent technologies developed in the field, including biomimicking the natural extracellular matrix structure and enhancing the transfer of the electrical signal...
May 12, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28474793/3d-printed-stretchable-tactile-sensors
#4
Shuang-Zhuang Guo, Kaiyan Qiu, Fanben Meng, Sung Hyun Park, Michael C McAlpine
The development of methods for the 3D printing of multifunctional devices could impact areas ranging from wearable electronics and energy harvesting devices to smart prosthetics and human-machine interfaces. Recently, the development of stretchable electronic devices has accelerated, concomitant with advances in functional materials and fabrication processes. In particular, novel strategies have been developed to enable the intimate biointegration of wearable electronic devices with human skin in ways that bypass the mechanical and thermal restrictions of traditional microfabrication technologies...
May 5, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28471009/enhancement-of-digestibility-of-casein-powder-and-raw-rice-particles-in-an-improved-dynamic-rat-stomach-model-through-an-additional-rolling-mechanism
#5
Peng Wu, Zhenkai Liao, Tingyu Luo, Liding Chen, Xiao Dong Chen
Previously, a dynamic in vitro rat stomach system (DIVRS-I) designed based on the principles of morphological bionics was reported. The digestibilities of casein powder and raw rice particles were found to be lower than those in vivo due to perhaps the less efficient compression performance and lower mixing efficiency. In this study, a 2nd version of the rat stomach system (DIVRS-II) with an additional rolling extrusion type motility on the wall of the soft-elastic silicone rat stomach model is introduced. The DIVRS-II was then tested by comparing the digestive behaviors of the casein powder suspensions and raw rice particles with those previously published data obtained from the in vivo test on living rats, the DIVRS-I, and the stirred tank reactor at its optimum stirring speed...
May 4, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28459740/engineering-the-future-one-cell-at-a-time-advancements-in-cell-based-techniques-from-novel-three-dimensional-cell-culture-to-a-bionic-kidney
#6
Jennifer J Chung, Maria F Arisi, Samir Zaman, Pavan Atluri
No abstract text is available yet for this article.
May 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28440043/self-sealed-bionic-long-microchannels-with-thin-wall-and-designable-nanoholes-prepared-by-line-contact-capillary-force-assembly
#7
Zhao-Xin Lao, Yan-Lei Hu, Deng Pan, Ren-Yan Wang, Chen-Chu Zhang, Jin-Cheng Ni, Bing Xu, Jia-Wen Li, Dong Wu, Jia-Ru Chu
Long microchannels with thin walls, small width, and nanoholes or irregular shaped microgaps, which are similar to capillaries or cancerous vessels, are urgently needed to simulate the physiological activities in human body. However, the fabrication of such channels remains challenging. Here, microchannels with designable holes are manufactured by combining laser printing with line-contact capillary-force assembly. Two microwalls are first printed by femtosecond laser direct-writing, and subsequently driven to collapse into a channel by the capillary force that arises in the evaporation of developer...
April 25, 2017: Small
https://www.readbyqxmd.com/read/28407961/bionic-multi-tentacled-ionic-liquid-modified-silica-gel-for-adsorption-and-separation-of-polyphenols-from-green-tea-camellia-sinensis-leaves
#8
Wei Zhang, Xueting Feng, Yohannes Alula, Shun Yao
For the first time, a new kind of bionic multi-tentacled ionic liquid-modified silica gel was synthesized and used as selective adsorbent in the preparative separation of tea polyphenols (TP) from green tea leaves. It was found that silica particles with polyvinyl alcohol chains modified by N-methyl imidazole proline salt (PVA·Im(+)·Pro(-)@SiO2) had the excellent performance in selective adsorption as well as fine separation for target compounds. The new adsorbent exhibited high adsorption capacity and good reusability, meanwhile the antioxidant activity of TP could be improved through its efficient enrichment...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28402102/high-performance-piezoresistive-electronic-skin-with-bionic-hierarchical-microstructure-and-microcracks
#9
Pu Nie, Ranran Wang, Xiaojuan Xu, Yin Cheng, Xiao Wang, Liangjing Shi, Jing Sun
Electronic skin (E-skin), a popular research topic at present, has achieved significant progress in a variety of sophisticated applications. However, the poor sensitivity and stability severely limit the development of its application. Here, we present a facile, cost-effective, and scalable method for manufacturing E-skin devices with bionic hierarchical microstructure and microcracks. Our devices exhibit high sensitivity (10 kPa(-1)) and excellent durability (10 000 cycles). The synergistic enhancement mechanism of the hierarchical microstructure and the microcracks on the conductive layers was discovered...
April 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28372192/biomimetic-elisa-detection-of-malachite-green-based-on-molecularly-imprinted-polymer-film
#10
Lu Li, Ai-Hong Peng, Zheng-Zhong Lin, Hui-Ping Zhong, Xiao-Mei Chen, Zhi-Yong Huang
A highly selective and sensitive enzyme-linked immunosorbent assay (ELISA) was developed for the detection of malachite green (MG) using a molecularly imprinted polymer (MIP) film as bionic antibody. The MIP film, based on the self-polymerization of dopamine, was fabricated on the surfaces of a 96-well microplate. It showed specific recognition for MG in aqueous solution. A direct competitive ELISA method was established with the sensitivity reaching 10.31μgL(-1) and the detection limit being 0.3μgL(-1). The cross-reactivity of two structural analogues to MG was less than 10%...
August 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28282899/testing-a-firefly-inspired-synchronization-algorithm-in-a-complex-wireless-sensor-network
#11
Chuangbo Hao, Ping Song, Cheng Yang, Xiongjun Liu
Data acquisition is the foundation of soft sensor and data fusion. Distributed data acquisition and its synchronization are the important technologies to ensure the accuracy of soft sensors. As a research topic in bionic science, the firefly-inspired algorithm has attracted widespread attention as a new synchronization method. Aiming at reducing the design difficulty of firefly-inspired synchronization algorithms for Wireless Sensor Networks (WSNs) with complex topologies, this paper presents a firefly-inspired synchronization algorithm based on a multiscale discrete phase model that can optimize the performance tradeoff between the network scalability and synchronization capability in a complex wireless sensor network...
March 8, 2017: Sensors
https://www.readbyqxmd.com/read/28261048/coupling-resistive-switching-devices-with-neurons-state-of-the-art-and-perspectives
#12
Alessandro Chiolerio, Michela Chiappalone, Paolo Ariano, Sergio Bocchini
Here we provide the state-of-the-art of bioelectronic interfacing between biological neuronal systems and artificial components, focusing the attention on the potentiality offered by intrinsically neuromorphic synthetic devices based on Resistive Switching (RS). Neuromorphic engineering is outside the scopes of this Perspective. Instead, our focus is on those materials and devices featuring genuine physical effects that could be sought as non-linearity, plasticity, excitation, and extinction which could be directly and more naturally coupled with living biological systems...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28253654/automatic-identification-of-hypernasality-in-normal-and-cleft-lip-and-palate-patients-with-acoustic-analysis-of-speech
#13
Marzieh Golabbakhsh, Fatemeh Abnavi, Mina Kadkhodaei Elyaderani, Fatemeh Derakhshandeh, Fatemeh Khanlar, Panying Rong, David P Kuehn
Hypernasality is seen in cleft lip and palate patients who had undergone repair surgery as a consequence of velopharyngeal insufficiency. Hypernasality has been studied by evaluation of perturbation, noise measures, and cepstral analysis of speech. In this study, feature extraction and analysis were performed during running speech using six different sentences. Jitter, shimmer, Mel frequency cepstral coefficients, bionic wavelet transform entropy, and bionic wavelet transform energy were calculated. Support vector machines were employed for classification of data to normal or hypernasal...
February 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28250792/traditional-chinese-medicine-bionic-tiger-bone-powder-for-the-treatment-of-ai-associated-musculoskeletal-symptoms
#14
Yifan Li, Zhenhua Zhang, Feifei Cui, Jialing Liu, Yitong Wang, Juling Jiang, Wenxin Ma, Wenping Lu
Background. Aromatase inhibitors (AIs) are used for adjuvant therapy of breast cancer; however AIMSS (AI-Associated Musculoskeletal Symptoms) can negatively affect quality of life and compliance. Most patients in China moved to TCM (traditional Chinese medicine) for help. TB (tiger bone) is used to treat bone disease, whose main ingredients are calcium and collagen. The objective of this study was to evaluate whether the TB prevented AIMSS in postmenopausal women with ER/PR+ breast cancer. Methods. We conducted a randomized, blind, controlled study of comparing TB versus placebo for 12 weeks in postmenopausal women with breast cancer who have taken AI for less than a month...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28247602/-study-on-the-acid-hydrolysis-fiber-remodeling-and-bionics-mineralization-of-rat-tail-tendon-collagen-type-%C3%A2
#15
Zhan Zhang, Chun Zhang, Qiaofeng Guo
Objective: To produce bionic bone material that is consistent with human bone in chemical composition and molecular structure using rat tail tendon collagen type Ⅰ. Methods: The type Ⅰcollagen derived from rat tail was extracted by acetic acid to form collagen fibers. The reconstructed collagen fibers were placed in the mineralized solution to mimic bone mineralization for 2-6 days. Bone mineralization was observed by transmission electron microscopy and electron diffraction.Results: Collagen fibers with characteristic D-Band structure were reconstructed by using rat tail tendon collagen type Ⅰ extracted with acid hydrolysis method...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28243053/bionic-design-of-wind-turbine-blade-based-on-long-eared-owl-s-airfoil
#16
Weijun Tian, Zhen Yang, Qi Zhang, Jiyue Wang, Ming Li, Yi Ma, Qian Cong
The main purpose of this paper is to demonstrate a bionic design for the airfoil of wind turbines inspired by the morphology of Long-eared Owl's wings. Glauert Model was adopted to design the standard blade and the bionic blade, respectively. Numerical analysis method was utilized to study the aerodynamic characteristics of the airfoils as well as the blades. Results show that the bionic airfoil inspired by the airfoil at the 50% aspect ratio of the Long-eared Owl's wing gives rise to a superior lift coefficient and stalling performance and thus can be beneficial to improving the performance of the wind turbine blade...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28225734/auditory-performance-and-electrical-stimulation-measures-in-cochlear-implant-recipients-with-auditory-neuropathy-compared-with-severe-to-profound-sensorineural-hearing-loss
#17
Joseph Attias, Tally Greenstein, Miriam Peled, David Ulanovski, Jay Wohlgelernter, Eyal Raveh
OBJECTIVES: The aim of the study was to compare auditory and speech outcomes and electrical parameters on average 8 years after cochlear implantation between children with isolated auditory neuropathy (AN) and children with sensorineural hearing loss (SNHL). DESIGN: The study was conducted at a tertiary, university-affiliated pediatric medical center. The cohort included 16 patients with isolated AN with current age of 5 to 12.2 years who had been using a cochlear implant for at least 3...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28225213/a-dual-organic-transistor-based-tactile-perception-system-with-signal-processing-functionality
#18
Yaping Zang, Hongguang Shen, Dazhen Huang, Chong-An Di, Daoben Zhu
Organic-device-based tactile-perception systems can open up new opportunities for the next generation of intelligent products. To meet the critical requirements of artificial perception systems, the efficient construction of organic smart elements with integrated sensing and signal processing functionalities is highly desired, but remains a challenge. This study presents a dual-organic-transistor-based tactile-perception element (DOT-TPE) with biomimetic functionality by the construction of organic synaptic transistors with integrated sensing transistors...
May 2017: Advanced Materials
https://www.readbyqxmd.com/read/28217275/multicentre-evaluation-of-the-na%C3%A3-da-ci-q70-sound-processor-feedback-from-cochlear-implant-users-and-professionals
#19
Jeanette Martin, Christine Poncet-Wallet, Angelika Illg, Sarah Perrin-Webb, Lise Henderson, Nathalie Noël-Petroff, Gennaro Auletta, Maria Grazia Barezzani, Karim Houri, Indian Research Group, Heike Bagus, Ulrich Hoppe, Jane Humphries, Wiebke van Treeck, Jeroen J Briaire, Martina Brendel, Nathalie Mathias
The aim of this survey was to gather data from both implant recipients and professionals on the ease of use of the Naída CI Q70 (Naída CI) sound processor from Advanced Bionics and on the usefulness of the new functions and features available. A secondary objective was to investigate fitting practices with the new processor. A comprehensive user satisfaction survey was conducted in a total of 186 subjects from 24 centres. In parallel, 23 professional questionnaires were collected from 11 centres. Overall, there was high satisfaction with the Naída CI processor from adults, children, experienced and new CI users as well as from professionals...
August 23, 2016: Audiology Research
https://www.readbyqxmd.com/read/28216124/the-pattern-and-degree-of-capsular-fibrous-sheaths-surrounding-cochlear-electrode-arrays
#20
Reuven Ishai, Barbara S Herrmann, Joseph B Nadol, Alicia M Quesnel
An inflammatory tissue reaction around the electrode array of a cochlear implant (CI) is common, in particular at the electrode insertion region (cochleostomy) where mechanical trauma often occurs. However, the factors determining the amount and causes of fibrous reaction surrounding the stimulating electrode, especially medially near the perimodiolar location, are unclear. Temporal bone (TB) specimens from patients who had undergone cochlear implantation during life with either Advanced Bionics (AB) Clarion ™ or HiRes90K™ (Sylmar, CA, USA) devices that have a half-band and a pre-curved electrode, or Cochlear ™ Nucleus (Sydney, Australia) device that have a full-band and a straight electrode were evaluated...
May 2017: Hearing Research
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