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Hee Jun Shin, Min-Cheol Lim, Kisang Park, Sae-Hyung Kim, Sung-Wook Choi, Gyeongsik Ok
We experimentally modulate the refractive index and the absorption coefficient of an SU-8 dry film in the terahertz region by UV light (362 nm) exposure with time dependency. Consequently, the refractive index of SU-8 film is increased by approximately 6% after UV light exposure. Moreover, the absorption coefficient also changes significantly. Using the reflective terahertz imaging technique, in addition, we can read security information printed by UV treatment on an SU-8 film that is transparent in the visible spectrum...
December 6, 2017: Sensors
Juan Li, Zhi Wang, Ta-Si Liu, Li-Min Gong, Qing-Ru Liu, Qing-Biao Tao, Zi-Sheng Fan, Shun-Xiang Li
The study aims to explore the main differential characteristics of Phragmites Rhizoma and its counterfeits (rhizomes of Arundo donax, Triarrhena lutarioriparia and Miscanthus sinensis) and provide experimental basis for the reasonable applications of gramineous plants through system research and comparison of plant morphogenesis, character, transverse organization characteristics and powder microscopic characteristics.
September 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Joseph V Pergolizzi, Jo Ann LeQuang, Robert Taylor, Robert B Raffa
The opioid epidemic is associated with morbidity and mortality, and it has taken a vast toll on American society. While prescription opioid abuse is part of the opioid problem, it is by no means the entirety of it. Opioid abuse appears to have entered a technology-driven new world of clandestine labs all over the globe and many new synthetic analog, counterfeit, and adulterated drugs that arrive via the internet faster than the Drug Enforcement Administration (DEA) can catalog and outlaw them. To deal with opioid abuse, it must be recognized that it is more - far more - than a subset of chronic pain patients who become addicted...
November 30, 2017: Postgraduate Medicine
Xiaoyue Wang, Xiaochen Chen, Pei Yang, Lili Wang, Jianping Han
Many species belonging to the genus Dendrobium are of great commercial value. However, their difficult growth conditions and high demand have caused many of these species to become endangered. Indeed, counterfeit Dendrobium products are common, especially in medicinal markets. This study aims to assess the suitability of the internal transcribed spacer 2 (ITS2) region as a marker for identifying Dendrobium and to evaluate its intragenomic variation in Dendrobium species. In total, 29,624 ITS2 copies from 18 species were obtained using 454 pyrosequencing to evaluate intragenomic variation...
2017: BioMed Research International
Yongjoon Heo, Su Yeon Lee, Ji-Won Kim, Tae Yoon Jeon, Shin-Hyun Kim
Inverse opals have been used for structural coloration and photonic applications owing to their photonic bandgap properties. When the photonic structures contain planar defects, they provide defect modes, which are useful for lasing, sensing, and waveguiding. However, it remains a challenge to insert a planar defect into inverse opals in a reproducible manner. Here, we report a new method for producing planar-defect-inserted inverse opals using sequential capillary wetting of colloidal crystals and creating micropatterns through photolithography...
November 22, 2017: ACS Applied Materials & Interfaces
Tanglue Feng, Shoujun Zhu, Qingsen Zeng, Siyu Lu, Songyuan Tao, Junjun Liu, Bai Yang
Involvement of clear photoluminescence (PL) mechanism in specific chemical structure is at forefront of carbon dots (CDs). Supramolecular interaction existing in plenty of materials, offers an inherent way to administrate the optical and photophysical properties, especially in terms of newly developed polymer carbon dots (PCDs). However, supramolecular interaction-derived PL regulation is always ignored in the shadow of many kinds of PL factors, and we still have a limited understanding on the distinct chemical structure and mechanism of supramolecular effect in PCDs...
November 22, 2017: ACS Applied Materials & Interfaces
Ben Parsonage, Philip K Hagglund, Lloyd Keogh, Nick Wheelhouse, Richard E Brown, Stephanie J Dancer
Ethical behavior encompasses actions that benefit both self and society. This means that tackling antimicrobial resistance (AMR) becomes an ethical obligation, because the prospect of declining anti-infectives affects everyone. Without preventive action, loss of drugs that have saved lives over the past century, will condemn ourselves, people we know, and people we don't know, to unacceptable risk of untreatable infection. Policies aimed at extending antimicrobial life should be considered within an ethical framework, in order to balance the choice, range, and quality of drugs against stewardship activities...
2017: Frontiers in Microbiology
Benjamin Mutschlechner, Stefan Schwaiger, Van Anh Thi Tran, Hermann Stuppner
Aqueous extracts of the roots of Eurycoma longifolia are traditionally used to improve sexual performance, to treat infertility and other sexual dysfunctions but also to increase muscle strength. Nowadays, many different products are commercially available which are promoted as E. longifolia extracts and claim to possess beneficial aphrodisiac effects. Since such herbal aphrodisiac preparations have been recently the target of fraudulent product counterfeiting and because eurycomanone, one of the main quassinoids of E...
November 14, 2017: Fitoterapia
Sohyun Jeong, Eunhee Ji
OBJECTIVE: The distribution of counterfeit or falsified drugs is increasing worldwide. This can contribute to the high burden of disease and cost to society and is of global concern with the worldwide circulation of pharmaceuticals. The preparation and implementation of good distribution practice should be one of the most important aspects of ensuring safe drug circulation and administration. This research aimed to compare and analyze good distribution practice guidelines from advanced countries and international organizations, and to evaluate the status of the current good distribution practice guidelines in the world...
November 20, 2017: International Journal of Clinical Pharmacology and Therapeutics
Yi Xu, Yan Lu, Hai-Ping Wu, Ying Bu
Snake drugs have high values in clinical medication for anti-inflammatory, analgesia activities and dredging collaterals. However, owing to their deficient resource and substantial profit, many counterfeits for snake drugs have appeared on the market. Traditional methods for Chinese medicine authentication include identification of origin, morphology identification, microscopy and physiochemical identification. But these methods are restricted in application because of their high morphological requirement for specimens, complex process for assays and indeterminate results guided by subjective...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Xiaoqian Ge, Jinliang Liu, Lining Sun
Lanthanide-doped upconversion nanoparticles (UCNPs) can convert long wavelength excitation radiation in the near-infrared region to higher energy emission radiation from ultraviolet to near-infrared. The anti-Stokes luminescence process will result in high tissue penetration depth, low background noise and low photo-damage in bioimaging applications. Considering these excellent optical performances, UCNPs have been considered as the next generation of fluorescent probes for sensing and bioimaging based on near-infrared light stimulation...
November 10, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Zelinlan Wang, Zhiguang Guo
Structural colours and superwettability are of great interest due to their unique characteristics. However, the application of materials with either structural colours or superwettability is limited. Moreover, materials possessing both structural colours and superwettability are crucial for many practical applications. The combination of structural colours and superwettability can result in materials for use various applications, such as in sensors, detectors, bioassays, anti-counterfeiting, and liquid actuators, by controlling surfaces to repel or absorb liquids...
November 10, 2017: Chemical Communications: Chem Comm
Simona Pichini, Renata Solimini, Paolo Berretta, Roberta Pacifici, Francesco Paolo Busardò
Illicit fentanyl and its analogues are very dangerous synthetic opioids, with high abuse potential and severe adverse effects including coma and death. They are used as adulterants in street heroin, cocaine, and methamphetamine, or as heroin substitutes sold to unaware users with a high risk of overdoses. Fentanyl and its analogues have also been identified in counterfeit medicinal products, such as oxycodone, hydrocodone, and alprazolam tablets, or as components of speedball mixtures together with cocaine or other stimulants...
November 8, 2017: Therapeutic Drug Monitoring
Brigitte Keller-Stanislawski, Norbert Paeschke
No abstract text is available yet for this article.
October 24, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
Vitalii Pashkov, Aleksey Soloviov, Andrii Olefir
INTRODUCTION: The paper identifies key risks associated with the illegal production and sale of medicines. Also there were generalized features of criminal responsibility for acts related to the trafficking of drugs in some Member States of the EU and analyzed legal means of combating the falsified drugs today. The problem concerning falsification of medicines is particularly acute not only in developing countries but also in developed ones. Fake is one in ten - twenty drug. The largest share of falsified drugs comes from the so-called «Asian tigers», already from which they come to the EU market...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
Hongyang Zhang, Yahui Li, Jianing Mi, Min Zhang, Yuerong Wang, Zhihong Jiang, Ping Hu
The fermentation products of Cordyceps sinensis (C. sinensis) mycelia are sustainable substitutes for natural C. sinensis. However, the volatile compositions of the commercial products are still unclear. In this paper, we have developed a simultaneous distillation-extraction (SDE) and gas chromatography-mass spectrometry (GC-MS) method for the profiling of volatile components in five fermentation products. A total of 64, 39, 56, 52, and 44 components were identified in the essential oils of Jinshuibao capsule (JSBC), Bailing capsule (BLC), Zhiling capsule (ZLC), Ningxinbao capsule (NXBC), and Xinganbao capsule (XGBC), respectively...
October 24, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Lu Xiao, Yishi Wu, Jianwei Chen, Zhenyi Yu, Yanping Liu, Jiannian Yao, Hongbing Fu
The development of metal-free organic room temperature phosphorescence (RTP) materials has attracted increasing attention because of their applications in sensors, biolabeling (imaging) agents and anticounterfeiting technology, but remains extremely challenging owing to the restricted spin-flip intersystem crossing (ISC) followed by low-yield phosphorescence that cannot compete with nonradiative relaxation processes. Here, we report a facile strategy to realize highly efficient RTP by doping iodo difluoroboron dibenzoylmethane (I-BF2dbm-R) derivatives into a rigid crystalline 4-iodobenzonitrile (Iph-C≡N) matrix...
November 7, 2017: Journal of Physical Chemistry. A
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 are highly attractive because of their wide prospects in advanced photonic applications, such as optical data storage, anticounterfeiting 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) that exhibits exceptional reversible absorption/luminescence modulation ability...
November 15, 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
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