Porphyrin nanofiber/single-walled carbon nanotube nanocomposite-based sensors for monitoring hydrogen peroxide vapor

In this study, we report the design and fabrication of a high-performance HPV sensor based on nanocomposites of nanofibers of a porphyrin derivative (oxo-[5,10,15,20-tetra(4-pyridyl)porphyrinato]titanium(IV) (TiOTPyP)) and single-walled carbon nanotubes (SWCNTs) at room temperature. Two types of HPV sensor transducers were fabricated using pristine SWCNTs only and TiOTPyP nanofiber/SWCNT nanocomposite and the sensor responses were compared. The significant differences in reproducibility and selectivity of the two sensors reflected the significant impact of the added TiOTPyP nanofibers on the device performance. The response of the TiOTPyP nanofiber/SWCNT nanocomposite-based sensor to 1 ppm of HPV is 9 times higher than that of the pristine SWCNT-based sensor. In addition, this sensor shows fast response/recovery times in the detection of HPV in the concentration range of 0.1 to 10 ppm, while showing a weak response to NH3 gas and negligible response to CO, toluene, acetone, hexane, NO, and NO2 gases.Graphical abstract
Source: Sensors and Actuators B: Chemical - Category: Chemistry Source Type: research

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Yafei Tan1,2, Omer Van den Bergh2, Jiang Qiu1* and Andreas von Leupoldt2* 1Faculty of Psychology, Southwest University, Chongqing, China 2Health Psychology, KU Leuven, Leuven, Belgium Dyspnea is a prevalent interoceptive sensation and the aversive cardinal symptom in many cardiorespiratory diseases as well as in mental disorders. Especially the unpredictability of the occurrence of dyspnea episodes has been suggested to be highly anxiety provoking for affected patients. Moreover, previous studies demonstrated that unpredictable exteroceptive stimuli increased self-reports and electrophysiological responses of an...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
This study evaluated the effects of dried ginger and LGWWJX decoction on cold asthma at the metabolomics level. It provides a reference for the research on the compatibility of Chinese Medicine. Introduction Ginger is a Chinese medicine (CM) used as a food and as a medicine, and is often used to treat cold syndrome through the property of warming. Dried ginger (Zingiberis Rhizoma, GanJiang, GJ) is processed from fresh ginger and is also commonly used in CM. It is used to treat cold asthma by “warming the stomach to dispel cold, warming the lung to resolve fluid,” and it has significant anti-inflammatory...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
Blood, saliva, urine, sweat or even ear wax can carry valuable information about an individual’s medical state. Until now, even simpler tests on such bodily fluids had to be carried out at medical facilities, but with the recent uptick in the development of digital diagnostic technologies, more and more solutions appear on the market which enable the patient to do such tests at home. Here we take a look around the bodily fluid business. From bloodletting to digital sweat measurement Blood, yellow bile, black bile, phlegm. Although it doesn’t sound appealing, the ancient Greek already thought that bodily f...
Source: The Medical Futurist - Category: Information Technology Authors: Tags: Future of Medicine Health Sensors & Trackers Portable Diagnostics blood bodily fluid digital digital health digital solutions digital tattoo saliva smart smart healthcare sweat technology urine Source Type: blogs
Johnson &Johnson (NYSE:JNJ) opened its latest life science incubator in New York City, the healthcare giant said today. The 30,000-square-foot JLabs @ NYC is a collaboration between Johnson &Johnson Innovation, New York State and the New York Genome Center. Sited at the genome center in SoHo, the incubator is home to 26 startups and has room for four more, New Brunswick, N.J.-based J&J said. “Johnson &Johnson has deep entrepreneurial roots in New York and we are pleased to see our unique JLabs model applied in this rich ecosystem to foster the creation of new healthcare innovations that have the pote...
Source: Mass Device - Category: Medical Devices Authors: Tags: Funding Roundup Research & Development johnsonandjohnson Source Type: news
This studycounters that notion, and the findings may suggest that many senior citizens remain more cognitively and emotionally intact than commonly believed. "We found that older people have similar ability to make thousands of hippocampal new neurons from progenitor cells as younger people do. We also found equivalent volumes of the hippocampus (a brain structure used for emotion and cognition) across ages. Nevertheless, older individuals had less vascularization and maybe less ability of new neurons to make connections. It is possible that ongoing hippocampal neurogenesis sustains human-specific cognitive fun...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
See something of interest? Please share our postings with colleagues in your institutions! Spotlight New funding available! The National Network of Libraries of Medicine, Middle Atlantic Region, is pleased to announce a new round of funding for health information outreach, health literacy initiatives, emergency preparedness partnerships and health sciences library projects. Applications will be due by COB on December 1. See a recent blog post from Executive Director, Kate Flewelling for details, or review our funding opportunities and start your application today! Apply Today! Health science librarians are invited to parti...
Source: NN/LM Middle Atlantic Region Blog - Category: Databases & Libraries Authors: Tags: Weekly Postings Source Type: news
Conclusion: To address the many challenges posed by EDCs, we argue that Africans should take the lead in prioritization and evaluation of environmental hazards, including EDCs. We recommend the institution of education and training programs for chemical users, adoption of the precautionary principle, establishment of biomonitoring programs, and funding of community-based epidemiology and wildlife research programs led and funded by African institutes and private companies. https://doi.org/10.1289/EHP1774 Received: 16 February 2017 Revised: 22 May 2017 Accepted: 24 May 2017 Published: 22 August 2017 Address correspond...
Source: EHP Research - Category: Environmental Health Authors: Tags: Commentary Source Type: research
Conclusions By showing how different health conditions are related to voter turnout, this study provides essential information for identifying gaps in the potential for political participation and for further inquiries aiming to develop models that explain the link between health and voting probability.
Source: Journal of Epidemiology and Community Health - Category: Epidemiology Authors: Tags: Research reports Source Type: research
Conclusion: Going beyond the powerful scientific and economic arguments for urgent action to reduce the burning of fossil fuels is the strong moral imperative to protect our most vulnerable populations. Citation: Perera FP. 2017. Multiple threats to child health from fossil fuel combustion: impacts of air pollution and climate change. Environ Health Perspect 125:141–148; http://dx.doi.org/10.1289/EHP299 Address correspondence to F.P. Perera, Department of Environmental Health Sciences, Columbia Center for Children’s Environmental Health, Columbia University Mailman School of Public Health, 722 West 168th St. ...
Source: EHP Research - Category: Environmental Health Authors: Tags: Commentaries Children's Health February 2017 Source Type: research
Follow me at @JohnRossMD Americans are confused about electronic cigarettes. A recent poll showed that the public was about evenly split between those who thought that electronic cigarettes, or e-cigarettes, were less harmful than conventional cigarettes, and those who believed that e-cigarettes were as bad as or worse than regular cigarettes. Unfortunately, there is no long-term safety data about e-cigarettes. What information we do have suggests that e-cigarettes have a complex mix of potential harms and benefits. E-cigarettes: Less deadly than regular cigarettes First, the good news: e-cigarettes are almost certainly le...
Source: New Harvard Health Information - Category: Consumer Health News Authors: Tags: Behavioral Health Cancer Lung disease Prevention Smoking cessation Source Type: news
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