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Laura Edison, Amber Erickson, Sasha Smith, Gaylord Lopez, Stephanie Hon, Alexandra King, Nancy Nydam, J Patrick O'Neal, Cherie Drenzek
No abstract text is available yet for this article.
October 20, 2017: MMWR. Morbidity and Mortality Weekly Report
Qingkai Qi, Chong Li, Xiaogang Liu, Shan Jiang, Zhaochao Xu, Richmond Lee, Mingqiang Zhu, Bin Xu, Wenjing Tian
Solid-state organic photoswitches with reversible luminescence modulation property is highly attractive because of their wide prospects in advanced photonic applications, such as optical data storage, anti-counterfeiting and bioimaging. Yet, developing such materials has long been a significant challenge. In this work, we construct an efficient solid-state photoswitch based on a spiropyran-functionalized distyrylanthracene derivative (DSA-2SP) which exhibits exceptional reversible absorption/luminescence modulation ability...
October 18, 2017: Journal of the American Chemical Society
Kanika -, Pawan Kumar, Satbir Singh, Bipin Kumar Gupta
We demonstrate a strategy to protect valuable items such as currency, pharmaceuticals, important documents etc. against counterfeiting by marking them with luminescent security codes. These luminescent security codes were printed by employing luminescent ink formulated from a cost effective dual mode luminescent composite pigment of Gd1.7Yb0.2Er0.1O3 and Zn0.98Mn0.02S phosphors using commercially available PVC Gold medium. In the composite, Gd1.7Yb0.2Er0.1O3 and Zn0.98Mn0.02S accounts for upconversion and downconversion processes, respectively...
October 17, 2017: Chemistry: a European Journal
Ze Zhao, Huan Wang, Luoran Shang, Yunru Yu, Fanfan Fu, Yuanjin Zhao, Zhongze Gu
As an important characteristic of many creatures, structural colors play a crucial role in the survival of organisms. Inspired by these features, an intelligent structural color material with a heterogeneous striped pattern and stimuli-responsivity by fast self-assembly of colloidal nanoparticles in capillaries with a certain diameter range are presented here. The width, spacing, color, and even combination of the structural color stripe patterns can be precisely tailored by adjusting the self-assembly parameters...
October 17, 2017: Advanced Materials
Joseph G L Lee, Shelley D Golden, Kurt M Ribisl
Increasing the per-unit cost of tobacco products is one of the strongest interventions for tobacco control. In jurisdictions with higher taxes in the U.S., however, cigarette pack litter studies show a substantial proportion of littered packs lack the appropriate tax stamp. More limited but still present counterfeiting also exists. We sought to examine the role of tobacco retailers as a source for untaxed and counterfeit products. Data collectors purchased Newport Green (menthol) or Marlboro Red cigarette packs in a national probability-based sample of tobacco retailers (in 97 counties) from June-October 2012...
December 2017: Preventive Medicine Reports
Ping He, Feng-Jie Li, Lian-da Li, Yi-Kui Li
Safety issues of traditional Chinese medicine injections has been heated debate. There are two diametrically opposed views: it should be used reasonable and developed healthily or be forbidden to use. Some people have many misunderstandings and prejudices about the safety of traditional Chinese medicine injections. Compared with western medicine,traditional Chinese medicine has its own particularity. Traditional Chinese medicine has complex components. Its research and clinical application is different from western medicine...
March 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Xiaowang Liu, Yu Wang, Xiyan Li, Zhigao Yi, Renren Deng, Liangliang Liang, Xiaoji Xie, Daniel T B Loong, Shuyan Song, Dianyuan Fan, Angelo H All, Hongjie Zhang, Ling Huang, Xiaogang Liu
Optical characteristics of luminescent materials, such as emission profile and lifetime, play an important role in their applications in optical data storage, document security, diagnostics, and therapeutics. Lanthanide-doped upconversion nanoparticles are particularly suitable for such applications due to their inherent optical properties, including large anti-Stokes shift, distinguishable spectroscopic fingerprint, and long luminescence lifetime. However, conventional upconversion nanoparticles have a limited capacity for information storage or complexity to prevent counterfeiting...
October 12, 2017: Nature Communications
Weijing Yao, Qingyong Tian, Jun Liu, Qingwen Xue, Mengxiao Li, Li Liu, Qiang Lu, Wei Wu
Advanced anti-counterfeiting labels have aroused an intensive interest in packaging industry to avoid the serious issue of counterfeit. However, the preparation and cost of the existing labels associated with the drawbacks, including the complex and high-cost equipment, limit the protection of the authenticity of goods. Herein, we developed a series of anti-counterfeiting labels based on multicolor upconversion micro-particles (UCMPs) inks via straightforward and low-cost solutions, including spin-coating, stamping and screen printing...
October 12, 2017: Nanoscale
Swati Shikha, Thoriq Salafi, Jinting Cheng, Yong Zhang
Encoded nano-structures/particles have been used for barcoding and are in great demand for the simultaneous analysis of multiple targets. Due to their nanoscale dimension(s), nano-barcodes have been implemented favourably for bioimaging, in addition to their security and multiplex bioassay application. In designing nano-barcodes for a specific application, encoding techniques, synthesis strategies, and decoding techniques need to be considered. The encoding techniques to generate unique multiple codes for nano-barcodes are based on certain encoding elements including optical (fluorescent and non-fluorescent), graphical, magnetic, and phase change properties of nanoparticles or their different shapes and sizes...
October 12, 2017: Chemical Society Reviews
Mohamed Ismail Nounou, Yamin Ko, Nada A Helal, Jeremy F Boltz
Global prevalence of nutraceuticals is noticeably high. The American market is flooded with nutraceuticals claiming to be of natural origin and sold with a therapeutic claim by major online retail stores such as Amazon and eBay. The objective of this commentary is to highlight the possible problems of online-sold nutraceuticals in the United States with respect to claim, adulterants, and safety. Furthermore, there is a lack of strict regulatory laws governing the sales, manufacturing, marketing, and label claims of nutraceutical formulations currently sold in the U...
October 11, 2017: Journal of Dietary Supplements
Sumit Randhir Singh, Avantika Dogra, Michael Stewart, Taraprasad Das, Jay Chhablani
During the past decade, drugs that inhibit the actions of vascular endothelial growth factor (VEGF) have become standard-of-care treatment for a variety of chorioretinal vascular conditions. The off-label, intravitreal use of ziv-aflibercept (Zaltrap) has provided clinicians with an additional cost-effective drug. The commercial preparation of ziv-aflibercept contains the same aflibercept (VEGF-trap) molecule as Eylea but has a much higher osmolarity (1000 mOsm/kg vs 300 mOsm/kg). Initial concerns regarding cytotoxicity and long-term safety of intravitreal ziv-aflibercept have been largely negated after a series of publications failed to identify adverse ocular and systemic side effects...
October 3, 2017: Asia-Pacific Journal of Ophthalmology
He Wang, Mengchao Li, Ze Yin, Tianxiang Zhang, Xu Chen, Donglei Zhou, Jinyang Zhu, Wen Xu, Haining Cui, Hongwei Song
High brightness of upconversion luminescence (UCL) for a thinner layer of UC nanoparticles is significant for routine applications of effective trademark anticounterfeiting technology. In this work, efficient UCL of NaYF4:Yb(3+),Er(3+)/Tm(3+) was realized by combining a Ta2O5 dielectric layer on the cyclical island silver films supported by poly(methyl methacrylate) opal photonic crystals (PCs). The synergistic modulation of localized surface plasmon resonance and PC effect results in a significant improvement of the local electromagnetic field and an optimum UC enhancement of 145 folds...
October 11, 2017: ACS Applied Materials & Interfaces
Shuya Dong, Jiao He, Huiping Hou, Yaping Shuai, Qi Wang, Wenling Yang, Zheng Sun, Qing Li, Kaishun Bi, Ran Liu
A novel, improved and comprehensive method for quality evaluation and discrimination of Herba Leonuri has been developed and validated based on normal- and reversed-phase chromatographic methods. To identify Herba Leonuri, normal- and reversed-phase high-performance thin-layer chromatography fingerprints were obtained by comparing the colors and Rf values of the bands, and reversed-phase HPLC fingerprints were obtained by using an Agilent Poroshell 120 SB-C18 within 28 min. By similarity analysis and hierarchical clustering analysis, we show that there are similar chromatographic patterns in Herba Leonuri samples, but significant differences in counterfeits and variants...
September 27, 2017: Journal of Separation Science
Vicki Brower
No abstract text is available yet for this article.
October 2017: Lancet Infectious Diseases
Mei Pan, Yi-Xuan Zhu, Kai Wu, Ling Chen, Ya-Jun Hou, Shao-Yun Yin, Hai-Ping Wang, Ya-Nan Fan, Cheng-Yong Su
Core-shell or striped heteroatomic lanthanide metal-organic framework hierarchical single crystals were obtained by liquid-phase anisotropic epitaxial growth, maintaining identical periodic organization while simultaneously exhibiting spatially segregated structure. Different types of domain and orientation-controlled multicolor photophysical models are presented, which show either visually distinguishable or visible/near infrared (NIR) emissive colors. This provides a new bottom-up strategy toward the design of hierarchical molecular systems, offering high-throughput and multiplexed luminescence color tunability and readability...
September 25, 2017: Angewandte Chemie
Andrea Wiegard, Matthias Heuermann
An official medicines control laboratory (OMCL) provides an important contribution to combat counterfeit and illegal medicines. The OMCL supports the competent authorities in controlling the quality of authorised medicinal products in the legal supply chain. For detecting counterfeit medicines in the legal supply chain, a risk-based approach in choice of products is conducted. Furthermore, the OMCL analyses suspicious medicines from the illegal supply chain for any other authority. The chemical analysis of a suspicious sample is needed to identify such a sample as a counterfeit medicine...
September 25, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
Jingqi Han, Xin Zhang, Hao Li, Yue Hou, Jingdan Hou, Zhongfeng Li, Feng Yang, Yang Liu, Tianyu Han
In this work, we synthesize a series of compounds with electron donor (D) and acceptor (A) units. They show general solvent effect in aprotic solvents, suggesting a charge transfer (CT) process. While in protic solvents including water, ethanol and methanol, the spectra exert no polarity-dependence but a remarkable hypochromatic shift together with the fading of CT band. Dynamic analysis implies that intermolecular hydrogen bond will be formed between carboxylic acid and protic solvent, boosting another deactivation pathway that jumps off a bigger energy gap, in other words, favoring the locally excited (LE) state emission...
September 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
David I Ellis, Rebecca Eccles, Yun Xu, Julia Griffen, Howbeer Muhamadali, Pavel Matousek, Ian Goodall, Royston Goodacre
Major food adulteration incidents occur with alarming frequency and are episodic, with the latest incident, involving the adulteration of meat from 21 producers in Brazil supplied to 60 other countries, reinforcing this view. Food fraud and counterfeiting involves all types of foods, feed, beverages, and packaging, with the potential for serious health, as well as significant economic and social impacts. In the spirit drinks sector, counterfeiters often 'recycle' used genuine packaging, or employ good quality simulants...
September 21, 2017: Scientific Reports
Adam Lanzarotta, Lisa Lorenz, JaCinta S Batson, Cheryl Flurer
A simple, fast, sensitive and effective pass/fail field-friendly method has been developed for detecting sildenafil in suspect Viagra and unapproved tablets using handheld Raman spectrometers and silver colloids. The method involves dissolving a portion of a tablet in water followed by filtration and addition of silver colloids, resulting in a solution that can be measured directly through a glass vial. Over one hundred counterfeit Viagra and unapproved tablets were examined on three different devices during the method development phase of the study...
September 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
Faysal A Yafi, Ira D Sharlip, Edgardo F Becher
INTRODUCTION: Phosphodiesterase type 5 inhibitors (PDE5Is) have demonstrated efficacy in the treatment of erectile dysfunction (ED). Although historically found to have limited drug-related adverse events, emerging data have suggested that PDE5Is might be associated with melanoma or recurrence of prostate cancer after radical prostatectomy. AIM: To summarize the literature on the safety of PDE5Is. METHODS: A literature review was performed through PubMed from 1990 through 2016 regarding ED...
September 8, 2017: Sexual Medicine Reviews
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