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https://www.readbyqxmd.com/read/28739025/soldering-mask-laser-removal-from-printed-circuit-boards-aiming-copper-recycling
#1
Marcus Paulo Raele, Lucas Ramos De Pretto, Denise Maria Zezell
Management of waste of electric and electronic equipment (WEEE) is a key issue for modern societies; furthermore, it contains valuable materials that can be recycled, especially in printed circuit boards (PCB), which have approximately one-third of their weight in copper. In this study we demonstrated the use of laser to strip the covering soldering mask on PCB's, thus exposing the copper underneath so that extraction techniques may take place. Using a Q-Switched Nd:YAG laser operating at 1064nm and 532nm we tested the procedure under different energy conditions...
July 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28737057/commercial-transactions-in-children-the-case-of-ghana
#2
Mensah Adinkrah
The current article represents an examination of commercial transactions involving the sale of children in contemporary Ghana. It presents the results of a criminological analysis of 20 cases of commercial transactions in children in Ghana. It describes the sociodemographic characteristics of offenders and victims, victim-offender relationships, offender motivations, public reactions to the phenomenon, as well as the criminal justice system's responses to the crime. The data were extracted from Ghanaian print and electronic presses...
July 1, 2017: International Journal of Offender Therapy and Comparative Criminology
https://www.readbyqxmd.com/read/28736923/applications-of-additive-manufacturing-in-dentistry-a-review
#3
REVIEW
Aishwarya Bhargav, Vijayavenkatraman Sanjairaj, Vinicius Rosa, Lu Wen Feng, Jerry Fuh Yh
Additive manufacturing (AM) or 3D printing has been hailed as the third industrial revolution as it has caused a paradigm shift in the way objects have been manufactured. Conventionally, converting a raw material to a fully finished and assembled, usable product comprises several steps which can be eliminated by using this process as functional products can be created directly from the raw material at a fraction of the time originally consumed. Thus, AM has found applications in several sectors including automotive, aerospace, printed electronics, and healthcare...
July 24, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28735192/nozzle-jet-printed-flexible-field-effect-transistor-biosensor-for-high-performance-glucose-detection
#4
Kiesar Sideeq Bhat, Rafiq Ahmad, Jin-Young Yoo, Yoon-Bong Hahn
Printable electronics is a subject of great interest for low-cost, facile and environmentally-friendly large scale device production. But, it still remains challenging for printable biosensor development. Herein, we present the fabrication of nozzle-jet printed flexible field-effect transistor (FET) glucose biosensor. The silver source-drain electrodes and ZnO seed layers were printed on flexible substrate by nozzle-jet printer followed by ZnO nanorods (ZnO NRs) synthesis and glucose oxidase (GOx) immobilization...
July 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28732345/multichannel-electroanalytical-devices-for-competitive-elisa-of-phenylethanolamine-a
#5
Yang Liu, Meng Cai, Weiping Wu, Yuting Fang, Pei She, Shouming Xu, Jianguo Li, Kang Zhao, Jingjuan Xu, Ning Bao, Anping Deng
Herein, we reported a disposable electroanalytical device for competitive enzyme-linked immunosorbent assay (ELISA) of phenylethanolamine A (PA). Conductive carbon tape coated with gold cluster served as the working electrode, while the counter and reference electrodes were fabricated on the filter paper by the screen-printing technique. Separating fabrication of the working electrode from other electrodes could make it possible for full utilization of the working electrode modification in bulk and no contamination of the immune-reagents on the counter and reference electrodes...
April 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28728010/advances-in-point-of-care-technologies-for-molecular-diagnostics
#6
REVIEW
Mohammad Zarei
Advances in miniaturization, nanotechnology, and microfluidics, along with developments in cloud-connected point-of-care (POC) diagnostics technologies are pushing the frontiers of POC devices toward low-cost, user-friendly, and enhanced sensitivity molecular-level diagnostics. The combination of various bio-sensing platforms within smartphone-integrated electronic readers provides accurate on-site and on-time diagnostics based on various types of chemical and biological targets. Further, 3D printing technology shows a huge potential toward fabrication and improving the performance of POC devices...
July 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28727539/state-and-local-chronic-disease-surveillance-using-electronic-health-record-systems
#7
Michael Klompas, Noelle M Cocoros, John T Menchaca, Diana Erani, Ellen Hafer, Brian Herrick, Mark Josephson, Michael Lee, Michelle D Payne Weiss, Bob Zambarano, Karen R Eberhardt, Jessica Malenfant, Laura Nasuti, Thomas Land
OBJECTIVES: To assess the feasibility of chronic disease surveillance using distributed analysis of electronic health records and to compare results with Behavioral Risk Factor Surveillance System (BRFSS) state and small-area estimates. METHODS: We queried the electronic health records of 3 independent Massachusetts-based practice groups using a distributed analysis tool called MDPHnet to measure the prevalence of diabetes, asthma, smoking, hypertension, and obesity in adults for the state and 13 cities...
July 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28727531/minimum-age-of-sale-for-tobacco-products-and-electronic-cigarettes-ethical-acceptability-of-us-tobacco-21-laws
#8
Stephanie Rubino Morain, Janet Malek
Several US jurisdictions have recently passed laws that raise the minimum age of sale for tobacco products and electronic cigarettes to 21 years (Tobacco 21 laws). Although these laws have been demonstrated to be an effective means to reduce youth smoking initiation, their passage and potential expansion have provoked controversy. Critics have objected to these laws, claiming that they unduly intrude on individual freedom and that they irrationally and paternalistically restrict the freedom of those aged 18 to 20 years, who were previously able to legally purchase tobacco products...
July 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28725015/all-printed-highly-sensitive-2d-mos2-based-multi-reagent-immunosensor-for-smartphone-based-point-of-care-diagnosis
#9
Memoon Sajid, Ahmed Osman, Ghayas Uddin Siddiqui, Hyun Bum Kim, Soo Wan Kim, Jeong Bum Ko, Yoon Kyu Lim, Kyung Hyun Choi
Immunosensors are used to detect the presence of certain bio-reagents mostly targeted at the diagnosis of a condition or a disease. Here, a general purpose electrical immunosensor has been fabricated for the quantitative detection of multiple bio-reagents through the formation of an antibody-antigen pair. The sensors were fabricated using all printing approaches. 2D transition metal dichalcogenide (TMDC) MoS2 thin film was deposited using Electrohydrodynamic atomization (EHDA) on top of an interdigitated transducer (IDT) electrode fabricated by reverse offset printing...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724380/the-use-of-entertainment-and-communication-technologies-before-sleep-could-affect-sleep-and-weight-status-a-population-based-study-among-children
#10
Nomathemba Dube, Kaviul Khan, Sarah Loehr, Yen Chu, Paul Veugelers
BACKGROUND: Short sleep duration and poor sleep quality have been demonstrated to be associated with childhood obesity. It has been suggested that electronic entertainment and communication devices (EECDs) including TVs, computers, tablets, video games and cell phones interfere with sleep in children and youth. The aim of this study was to assess the impact that the use of EECDs in the hour before bedtime has on sleep and weight status to inform sleep promotion interventions and programs to prevent childhood obesity...
July 19, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28724128/topical-corticosteroid-phobia-in-atopic-dermatitis-a-systematic-review
#11
Alvin W Li, Emily S Yin, Richard J Antaya
Importance: Topical corticosteroid (TCS) phobia refers to the negative feelings and beliefs related to TCSs experienced by patients and patients' caregivers. This phenomenon may be a major contributing factor in treatment failure in patients with atopic dermatitis, yet it has been sparsely described in the literature. Objective: To systematically assess the nomenclature, prevalence, origins, and effect on treatment adherence of TCS phobia in atopic dermatitis. Evidence Review: A literature search was conducted using specific eligibility criteria across electronic databases, including Ovid (MEDLINE, EMBASE), PubMed, and Web of Science, for articles published from January 1, 1946, to October 31, 2016...
July 19, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28723187/wearable-flexible-and-stretchable-glove-biosensor-for-on-site-detection-of-organophosphorus-chemical-threats
#12
Rupesh K Mishra, Lee J Hubble, Aida Martín, Rajan Kumar, Abbas Barfidokht, Jayoung Kim, Mustafa M Musameh, Ilias L Kyratzis, Joseph Wang
A flexible glove-based electrochemical biosensor with highly stretchable printed electrode system has been developed as a wearable point-of-use screening tool for defense and food security applications. This disposable-mechanically robust "lab-on-a-glove" integrates a stretchable printable enzyme-based biosensing system and active surface for swipe sampling on different fingers, and is coupled with a compact electronic interface for electrochemical detection and real-time wireless data transmission to a smartphone device...
April 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723149/cyclewise-operation-of-printed-mos2-transistor-biosensors-for-rapid-biomolecule-quantification-at-femtomolar-levels
#13
Byunghoon Ryu, Hongsuk Nam, Bo-Ram Oh, Yujing Song, Pengyu Chen, Younggeun Park, Wenjie Wan, Katsuo Kurabayashi, Xiaogan Liang
Field-effect transistors made from MoS2 and other emerging layered semiconductors have been demonstrated to be able to serve as ultrasensitive biosensors. However, such nanoelectronic sensors still suffer seriously from a series of challenges associated with the poor compatibility between electronic structures and liquid analytes. These challenges hinder the practical biosensing applications that demand rapid, low-noise, highly specific biomolecule quantification at femtomolar levels. To address such challenges, we study a cyclewise process for operating MoS2 transistor biosensors, in which a series of reagent fluids are delivered to the sensor in a time-sequenced manner and periodically set the sensor into four assay-cycle stages, including incubation, flushing, drying, and electrical measurement...
February 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723074/paper-based-bimodal-sensor-for-electronic-skin-applications
#14
Minhyun Jung, Kyungkwan Kim, Bumjin Kim, Haena Cheong, Kwanwoo Shin, Oh-Sun Kwon, Jong-Jin Park, Sanghun Jeon
We present the development of a flexible bimodal sensor using a paper platform and ink-jet printing method, which are suited for low-cost fabrication processes and realization of flexible devices. In this study, we employed a vertically stacked bimodal device architecture in which a temperature sensor is stacked on top of a pressure sensor and operated on different principles, allowing the minimization of interference effects. For the temperature sensor placed in the top layer, we used the thermoelectric effect and formed a closed-loop thermocouple composed of two different printable inks: conductive PEDOT:PSS and silver nanoparticles on a flexible paper platform, and obtained temperature-sensing capability over a wide range (150 ℃)...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28721407/3d-printed-reversible-shape-changing-soft-actuators-assisted-by-liquid-crystal-elastomers
#15
Chao Yuan, Devin J Roach, Conner K Dunn, Quanyi Mu, Xiao Kuang, Christopher M Yakacki, T J Wang, Kai Yu, H Jerry Qi
In this work, we advance printed active composites by combining 3D printing, printed electronics, and liquid crystal elastomers (LCEs) to achieve soft actuators with free-standing two-way shape changing behaviors. Incorporated LCE strips are activated by Joule heating produced by printed conductive wires, while uniaxial deformation of the LCE strip is utilized as a driving force to achieve bending in the printed composite. The bending behavior of laminated hinges is first characterized in order to obtain a precise control of actuation, which is then exploited to actuate four demonstrative designs: a morphing airplane, a miura-ori structure, a cubic box, and a soft crawler...
July 19, 2017: Soft Matter
https://www.readbyqxmd.com/read/28720761/parylene-c-topographic-micropattern-as-a-template-for-patterning-pdms-and-polyacrylamide-hydrogel
#16
Ilaria Sanzari, Mauro Callisti, Antonio De Grazia, Daniel J Evans, Tomas Polcar, Themistoklis Prodromakis
Parylene C is a well-known polymer and it has been mainly employed as a protective layer for implantable electronics. In this paper, we propose a new approach to use Parylene C as a versatile template for patterning soft materials potentially applicable as scaffolds in cardiac tissue engineering (TE). Parylene C substrates were anisotropically patterned through standard lithographic process with hydrophilic channels separating raised hydrophobic strips. Ridges and grooves of the template are 10 µm width and depth ranging from 1 to 17 µm...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720641/correction-to-implementation-of-technology-based-patient-engagement-strategies-within-practice-based-research-networks
#17
(no author information available yet)
In the above-mentioned article,(1) the electronic version differs from the print version due to the placement of the figures. While the figure headings for Figure 1 and 2 are correct, the figures themselves were flipped during the processing of the article. The electronic version on the Journal of the American Board of Family Medicine website has been corrected. We apologize for the error, and we regret any confusion or inconvenience it may have caused.
July 2017: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/28720640/correction-to-fitwits-tm-leads-to-improved-parental-recognition-of-childhood-obesity-and-plans-to-encourage-change
#18
(no author information available yet)
In the above-mentioned article,(1) the electronic version differs from the print version due to a numeric error in Table 4. While the nearby text above the table does use the correct number (23) [proportionate hand-based portion sizes (n = 23)]; Table 4 reads "3" rather than "23" in the third row, first column under Eat healthier portion sizes The electronic version on the Journal of the American Board of Family Medicine website has been corrected. We apologize for the error, and we regret any confusion or inconvenience it may have caused...
July 2017: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/28719876/photoelectrocatalytic-degradation-of-methylene-blue-using-f-doped-tio2-photoelectrode-under-visible-light-irradiation
#19
Dong Liu, Renwen Tian, Jianqiao Wang, Er Nie, Xianqing Piao, Xin Li, Zhuo Sun
Photoelectrocatalysis (PEC) has attracted great interest due to cost effectiveness and high efficiency in water treatment. In this study, F doped TiO2 (F-TiO2) photoelectrodes with honeycomb like morphology were prepared, and the PEC performance was investigated. F-TiO2 particles that showed enhanced absorption of visible light were synthesized via a sol-gel method. F-TiO2 particles were anchored onto the surface of F-doped SnO2 glass by a screen-printing method to prepare the F-TiO2 photoelectrodes. The PEC performance of the F-TiO2 photoelectrodes was investigated via the degradation of methylene blue (MB) under visible light irradiation...
July 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28719748/low-temperature-fusible-silver-micro-nanodendrites-based-electrically-conductive-composites-for-next-generation-printed-fuse-links
#20
Rui Yang, Yang Wang, Dang Wu, Yubin Deng, Yingying Luo, Xiaoya Cui, Xuanyu Wang, Zhixue Shu, Cheng Yang
We systematically investigate the long-neglected low-temperature fusing behavior of silver micro/nanodendrites and demonstrate the feasibility of employing this intriguing property for the printed electronics application, i.e., printed fuse-links. Fuse-links have experienced insignificant changes since they were invented in the 1890s. By introducing silver micro/nanodendrites-based electrically conductive composites (ECCs) as a printed fusible element, coupled with the state-of-the-art printed electronics technology, key performance characteristics of a fuse-link are dramatically improved as compared with the commercially available counterparts, including an expedient fabrication process, lower available rated current (40% of the minimum value of Littelfuse 467 series fuses), shorter response time (only 3...
July 24, 2017: ACS Nano
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