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https://www.readbyqxmd.com/read/28335296/controlled-mechanical-cracking-of-metal-films-deposited-on-polydimethylsiloxane-pdms
#1
Andreas Polywka, Luca Stegers, Oliver Krauledat, Thomas Riedl, Timo Jakob, Patrick Görrn
Stretchable large area electronics conform to arbitrarily-shaped 3D surfaces and enables comfortable contact to the human skin and other biological tissue. There are approaches allowing for large area thin films to be stretched by tens of percent without cracking. The approach presented here does not prevent cracking, rather it aims to precisely control the crack positions and their orientation. For this purpose, the polydimethylsiloxane (PDMS) is hardened by exposure to ultraviolet radiation (172 nm) through an exposure mask...
September 9, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334303/characterization-of-direct-current-electrical-penetration-graph-waveforms-and-correlation-with-the-probing-behavior-of-matsumuratettix-hiroglyphicus-hemiptera-cicadellidae-the-insect-vector-of-sugarcane-white-leaf-phytoplasma
#2
J Roddee, Y Kobori, H Yorozuya, Y Hanboonsong
The leafhopper Matsumuratettix hiroglyphicus (Matsumura) (Hemiptera: Cicadellidae) is an important vector of phytoplasma causing white leaf disease in sugarcane. Thus, the aim of our study was to understand and describe the stylet-probing activities of this vector while feeding on sugarcane plants, by using direct current (DC) electrical penetration graph (EPG) monitoring. The EPG signals were classified into six distinct waveforms, according to amplitude, frequency, voltage level, and electrical origin of the observed traces during stylet penetration into the host plant tissues (probing)...
March 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28333933/geometry-dependent-functional-changes-in-ipsc-derived-cardiomyocytes-probed-by-functional-imaging-and-rna-sequencing
#3
Christopher A Werley, Miao-Ping Chien, Jellert Gaublomme, Karthik Shekhar, Vincent Butty, B Alexander Yi, Joel M Kralj, William Bloxham, Laurie A Boyer, Aviv Regev, Adam E Cohen
Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CM) are a promising platform for cardiac studies in vitro, and possibly for tissue repair in humans. However, hiPSC-CM cells tend to retain morphology, metabolism, patterns of gene expression, and electrophysiology similar to that of embryonic cardiomyocytes. We grew hiPSC-CM in patterned islands of different sizes and shapes, and measured the effect of island geometry on action potential waveform and calcium dynamics using optical recordings of voltage and calcium from 970 islands of different sizes...
2017: PloS One
https://www.readbyqxmd.com/read/28333272/family-building-using-embryo-adoption-relationships-and-contact-arrangements-between-provider-and-recipient-families-a-mixed-methods-study
#4
Lucy Frith, Eric Blyth, Steve Lui
STUDY QUESTION: What contact arrangements are established between providers and recipients of embryos using Snowflakes® Embryo Adoption Program? SUMMARY ANSWER: Contact arrangements varied considerably and were generally positively described, although some challenges were acknowledged. WHAT IS KNOWN ALREADY: Reproductive technologies create new and diverse family forms, and the ways in which families created by embryo adoption are negotiated in practice have not been extensively investigated...
March 8, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28330371/formation-of-coffee-stain-patterns-at-the-nanoscale-the-role-of-nanoparticle-solubility-and-solvent-evaporation-rate
#5
Jianguo Zhang, Jasmin Milzetti, Frédéric Leroy, Florian Müller-Plathe
When droplets of nanoparticle suspension evaporate from surfaces, they leave behind a deposit of nanoparticles. The mechanism of evaporation-induced pattern formation in the deposit is studied by molecular dynamics simulations for sessile nanodroplets. The influence of the interaction between nanoparticles and liquid molecules and the influence of the evaporation rate on the final deposition pattern are addressed. When the nanoparticle-liquid interaction is weaker than the liquid-liquid interaction, an interaction-driven or evaporation-induced layer of nanoparticles appears at the liquid-vapor interface and eventually collapses onto the solid surface to form a uniform deposit independently of the evaporation rate...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28330338/in-situ-local-contact-angle-measurement-in-a-co2-brine-sand-system-using-microfocused-x-ray-ct
#6
Pengfei Lv, Yu Liu, Zhe Wang, Shuyang Liu, Lanlan Jiang, Junlin Chen, Yongchen Song
The wettability of porous media is of major interest in a broad range of natural and engineering applications. The wettability of a fluid on a solid surface is usually evaluated by the contact angle between them. While in situ local contact angle measurements are complicated by the topology of porous media, which can make it difficult to use traditional methods, recent advances in microfocused X-ray computed tomography (micro-CT) and image processing techniques have made it possible to measure contact angles on the scale of the pore sizes in such media...
March 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28329836/convoys-of-social-relations-in-cross-national-context
#7
Kristine J Ajrouch, Heather R Fuller, Hiroko Akiyama, Toni C Antonucci
Purpose of the Study: This study examines national variations in social networks among older adults across 4 countries in diverse regions of the world: Japan, Lebanon, Mexico, and the United States. The aim is to provide insights into universal as well as unique attributes of social networks in later life. Design and Methods: The analyses examine convoy characteristics among adults aged 50+ in metropolitan areas of Japan (N = 557), Lebanon (N = 284), Mexico (N = 556), and the United States (N = 583)...
January 19, 2017: Gerontologist
https://www.readbyqxmd.com/read/28327163/injuries-in-male-and-female-semi-professional-football-soccer-players-in-nigeria-prospective-study-of-a-national-tournament
#8
Oluwatoyosi Babatunde Alex Owoeye, Ayoola Ibifubara Aiyegbusi, Oluwaseun Akinleye Fapojuwo, Oluwaseun Abdulganiyu Badru, Anike Rasheedat Babalola
BACKGROUND: Research on the epidemiology of football injuries in Africa is very sparse despite its importance for injury prevention planning in a continent with limited sports medicine resources. The vast majority of studies available in literature were conducted in Europe and only a very few studies have prospectively reported the pattern of football injury in Africa. The purpose of this study was to evaluate the incidence and pattern of injuries in a cohort of male and female semi-professional football players in Nigeria...
March 21, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28326990/native-and-non-native-perception-of-stress-in-mapudungun-assessing-structural-maintenance-in-the-phonology-of-an-endangered-language
#9
Benjamin J Molineaux
Today, virtually all speakers of Mapudungun (formerly Araucanian), an endangered language of Chile and Argentina, are bilingual in Spanish. As a result, the firmness of native speaker intuitions-especially regarding perceptually complex issues such as word-stress-has been called into question. Even though native intuitions are unavoidable in the investigation of stress position, efforts can be made in order to clarify what the actual sources of the intuitions are, and how consistent and 'native' they remain given the language's asymmetrical contact conditions...
March 2017: Language and Speech
https://www.readbyqxmd.com/read/28326784/drop-impact-on-oblique-superhydrophobic-surfaces-with-two-tier-roughness
#10
Rui Zhang, Pengfei Hao, Feng He
This paper investigates the complex physical phenomenon of oblique drop impact on superhydrophobic substrates with two-tier roughness (patterned with varied submillimeter-scale posts and coated with nano-particles). Experimental results show that the impact Weber number of drops and the solid fraction of the submillimeter-scale post structures are crucial for the outcomes of oblique drop collisions. Water droplets with 10<Wen<245 are found to rebound on all the test substrates. As the surface solid fraction decreases, four possible bouncing patterns occur in sequence, sliding rebound, stretched rebound, penetration rebound and breakup rebound...
March 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28325674/-risk-factors-for-contact-lens-related-microbial-keratitis-a-multicenter-case-control-study
#11
P H Becmeur, F Abry, T Bourcier, N Meyer, A Sauer
PURPOSE: Currently, the most feared complication by ophthalmologists of contact lens (CL) wear is microbial keratitis (MK), even though its incidence remains low. It is also a significant financial burden for society. This study aimed to identify the risk factors for CL-related MK especially with regard to hygiene and pattern of use, in a large, prospective, multicenter, case-control study. METHODS: A multicenter retrospective case-control study was designed. The CL-related MK subpopulation (case) was compared with healthy CL wearers (control) using a 52-item anonymous questionnaire designed to determine subject demographics, lens wear history, lens type and disinfection solution, fitting, patient education, hygiene and maintenance of contact lenses, and patient history...
March 18, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28325632/current-optometric-practices-and-attitudes-in-keratoconus-patient-management
#12
Sara Ortiz-Toquero, Raul Martin
PURPOSE: To compare the current optometric practices and attitudes in the management of keratoconus patients in the UK and Spain. METHODS: An online survey (adapted to optometric practices) was distributed via a newsletter emailed by various professional organizations in the UK and Spain. RESULTS: Four hundred and sixty-four practitioners (126 in the UK; 338 in Spain) who prescribed gas permeable GP contact lenses (CLs) more than once per month (54...
March 18, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28325306/cells-capture-and-antimicrobial-effect-of-hydrophobically-modified-chitosan-coating-on-escherichia-coli
#13
Duc-Thang Vo, Cheng-Kang Lee
Hydrophobically modified chitosan (HMCS), prepared by reacting alkyl aldehyde with chitosan was demonstrated to be an effective antimicrobial and transparent coating. The grafted alkyl chains exist as protruded hydrophobic tails on the HMCS coating surface. In contact with E. coli cells, HMCS coating captured and immobilized the cells via these hydrophobic tails. The hydrophobic tails could also kill the cells captured on the coating surface as visualized by fluorescence microscope. More than 50% of the initially loaded cells (2...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28321966/sleep-disordered-breathing-in-chronic-heart-failure-is-highly-variable-when-measured-remotely-using-a-novel-non-contact-biomotion-sensor
#14
Kenneth McDonald, Rory O'Hanlon, Henry Oluwasefunmi Savage, Rami N Khushaba, Michael Colefax, Steven Farrugia, Faizan Javed, Klaus Schindhelm, Ian Wilcox, Martin R Cowie
We used a remotely monitored non-contact biosensor (SleepMinder™) to measure breathing during sleep (SDB) in a prospective study of 91 patients with stable class II to IV heart failure (HF). The device algorithm measures a surrogate of the traditional apnoea/hypopnoea index (AHI) measured in polysomnographic sleep studies. Data was transmitted daily to a central monitoring centre and analysed in consecutive 2-week blocks. A total of 37 465 nights over 3-24 months was analysed. An AHI of >15/h was considered clinically significant...
March 21, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28321362/from-eggs-to-bites-do-ovitrap-data-provide-reliable-estimates-of-aedes-albopictus-biting-females
#15
Mattia Manica, Roberto Rosà, Alessandra Della Torre, Beniamino Caputo
BACKGROUND: Aedes albopictus is an aggressive invasive mosquito species that represents a serious health concern not only in tropical areas, but also in temperate regions due to its role as vector of arboviruses. Estimates of mosquito biting rates are essential to account for vector-human contact in models aimed to predict the risk of arbovirus autochthonous transmission and outbreaks, as well as nuisance thresholds useful for correct planning of mosquito control interventions. Methods targeting daytime and outdoor biting Ae...
2017: PeerJ
https://www.readbyqxmd.com/read/28320674/simulation-study-of-an-ultrasound-retinal-prosthesis-with-a-novel-contact-lens-array-for-noninvasive-retinal-stimulation
#16
Mengdi Gao, Yanyan Yu, Huixia Zhao, Guofeng Li, Hongyang Jiang, Congzhi Wang, Feiyan Cai, Leanne Chan, Bernard Chiu, Wei Qian, Weibao Qiu, Hairong Zheng
Millions of people around the world suffer from varying degrees of vision loss (including complete blindness) because of retinal degenerative diseases. Artificial retinal prosthesis, which is usually based on electrical neurostimulation, are the most advanced technology for different types of retinal degeneration. However, this technology involves placing a device into the eyeball, and such a highly invasive procedure is inevitably highly risk and expensive. Ultrasound has been demonstrated to be a promising technology for noninvasive neurostimulation, making it possible to stimulate the retina and induce action potentials similar to those elicited by light stimulation...
March 15, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28320483/human-and-feline-adipose-derived-mesenchymal-stem-cells-have-comparable-phenotype-immunomodulatory-functions-and-transcriptome
#17
Kaitlin C Clark, Fernando A Fierro, Emily Mills Ko, Naomi J Walker, Boaz Arzi, Clifford G Tepper, Heather Dahlenburg, Andrew Cicchetto, Amir Kol, Lyndsey Marsh, William J Murphy, Nasim Fazel, Dori L Borjesson
BACKGROUND: Adipose-derived mesenchymal stem cells (ASCs) are a promising cell therapy to treat inflammatory and immune-mediated diseases. Development of appropriate pre-clinical animal models is critical to determine safety and attain early efficacy data for the most promising therapeutic candidates. Naturally occurring diseases in cats already serve as valuable models to inform human clinical trials in oncologic, cardiovascular, and genetic diseases. The objective of this study was to complete a comprehensive side-by-side comparison of human and feline ASCs, with an emphasis on their immunomodulatory capacity and transcriptome...
March 20, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28319362/tuning-the-work-function-of-printed-polymer-electrodes-by-introducing-a-fluorinated-polymer-to-enhance-the-operational-stability-in-bottom-contact-organic-field-effect-transistors
#18
Se Hyun Kim, Jiye Kim, Sooji Nam, Hwa Sung Lee, Seung Woo Lee, Jaeyoung Jang
Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is a promising electrode material for organic electronic devices due to its high conductivity, good mechanical flexibility, and feasibility of easy patterning with various printing methods. The work function of PEDOT:PSS needs to be increased for efficient hole injection and the addition of a fluorine-containing material has been reported to increase the work function of PEDOT:PSS. However, it remains a challenge to print PEDOT:PSS electrodes while simultaneously tuning their work functions...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319170/antibody-response-against-phop-efficiently-discriminates-among-healthy-individuals-tuberculosis-patients-and-their-contacts
#19
Aurobind Vidyarthi, Nargis Khan, Tapan Agnihotri, Kaneez F Siddiqui, Girish R Nair, Ashish Arora, Ashok K Janmeja, Javed N Agrewala
Tuberculosis continues to be one of the most devastating global health problem. Its diagnosis will benefit in timely initiation of the treatment, cure and therefore reduction in the transmission of the disease. Tests are available, but none can be comprehensively relied on for its diagnosis; especially in TB-endemic zones. PhoP is a key player in Mycobacterium tuberculosis virulence but nothing has been known about its role in the diagnosis of TB. We monitored the presence of anti-PhoP antibodies in the healthy, patients and their contacts...
2017: PloS One
https://www.readbyqxmd.com/read/28319133/effects-of-sudden-walking-perturbations-on-neuromuscular-reflex-activity-and-three-dimensional-motion-of-the-trunk-in-healthy-controls-and-back-pain-symptomatic-subjects
#20
Juliane Mueller, Tilman Engel, Steffen Mueller, Josefine Stoll, Heiner Baur, Frank Mayer
BACKGROUND: Back pain patients (BPP) show delayed muscle onset, increased co-contractions, and variability as response to quasi-static sudden trunk loading in comparison to healthy controls (H). However, it is unclear whether these results can validly be transferred to suddenly applied walking perturbations, an automated but more functional and complex movement pattern. There is an evident need to develop research-based strategies for the rehabilitation of back pain. Therefore, the investigation of differences in trunk stability between H and BPP in functional movements is of primary interest in order to define suitable intervention regimes...
2017: PloS One
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