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Yong He, Yunfeng Hu, Xinwei Jiang, Tianfeng Chen, Yuetang Ma, Shi Wu, Jianxia Sun, Rui Jiao, Xiaoling Li, Liehua Deng, Weibin Bai
Ultraviolet (UV) radiation from sunlight, especially UVB (290-320nm), is one of the most important environmental factors that destroys the integrity of the skin and causes epidermal cell apoptosis, potentially even leading to skin cancer. UVB irradiation can cause skin damage by stimulating inflammatory and apoptotic pathways. Anthocyanins are flavonoids that are common in many vegetable foods, and have also demonstrated chemopreventive effects. Cyanidin-3-O-glucoside, as a typical anthocyanin, exhibits anti-inflammatory and anti-oxidant effects...
October 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
Yannan Chen, Gangqiang Zhu, Mirabbos Hojamberdiev, Jianzhi Gao, Runliang Zhu, Chenghui Wang, Xiumei Wei, Peng Liu
Ag2O nanoparticles-loaded Bi5O7I microspheres forming a three dimensional Ag2O/Bi5O7I p-n heterojunction photocatalyst with wide-spectrum response were synthesized in this study. The results of transmission electron microscopy observations revealed that the Ag2O nanoparticles with the diameter of ca. 10-20nm were distributed on the surfaces of Bi5O7I nanosheets. The as-synthesized Ag2O/Bi5O7I exhibited an excellent wide-spectrum response to wavelengths ranging from ultraviolet (UV) to near-infrared (NIR), indicating its potential for effective utilization of solar energy...
October 7, 2017: Journal of Hazardous Materials
JinJing Yang, GuiZhi Sun, MingRong Qian, LingLi Huang, XianBing Ke, Bo Yang
An effective thin layer chromatography (TLC) purification procedure coupled to high-performance liquid chromatography (HPLC) method was developed for the determination of florfenicol (FF) in pig, chicken and fish feedstuffs. The feedstuff samples were extracted with ethyl acetate, defatted with n-hexane saturated with acetonitrile, and further purified by TLC. The chromatographic separation was performed on a Waters Symmetry C18 column using an isocratic procedure with acetonitrile-water (35:65, v/v) at 0.6mL/min...
September 29, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Thabo J Brooms, Benton Otieno, Maurice S Onyango, Aoyi Ochieng
This study evaluated the photocatalytic activity of polyaniline (PANI)-capped titanium dioxide and zinc oxide (TiO2/ZnO) hybrid, for the degradation of P-Cresol. The hybrid was synthesized by precipitating ZnO on the surface of commercial TiO2. An "in situ" chemical oxidative polymerization method was used to prepare the PANI capped hybrid (TiO2/ZnO/PANI). The photocatalysts were characterized by powder X-ray diffraction (XRD), a Brunauer Emmett Teller (BET) analyzer, Fourier-transform infrared (FTIR) and photoluminescence spectroscopies, high resolution-transmission electron microscopy (HR-TEM) and thermogravimetric analysis (TGA)...
October 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Li Ling, Heather Tugaoen, Jonathon Brame, Shahnawaz Sinha, Chuanhao Li, Jared J Schoepf, Kiril Hristovski, Jae-Hong Kim, Chii Shang, Paul Westerhoff
A photocatalyst-coated optical fiber was coupled with a 318-nm ultraviolet-A light emitting diode, which activated the photocatalysts by interfacial photon-electron excitation while minimizing photonic energy losses due to conventional photocatalytic barriers. The light delivery mechanism was explored via modeling of evanescent wave energy produced upon total internal reflection and photon refraction into the TiO2 surface coating. This is the first work to explore aqueous phase LED-irradiated optical fibers for treating organic pollutants and the first to propose a dual-mechanistic approach to light delivery and photocatalytic performance...
October 13, 2017: Environmental Science & Technology
Huizhang Guo, Daniel Klose, Yuhui Hou, Gunnar Jeschke, Ingo Burgert
Titanium dioxide is most widely used in sunscreens because of its strong ultraviolet (UV) light absorbing capabilities and its resistance to discoloration under UV exposure. However, when deposited as a thin film, the high refractive index of titanium dioxide typically results in whiteness and opacity, which limits the use of titanium dioxide for material surfaces, for which long-term natural appearance is of high relevance. Since the whitish appearance is due to the strong light scattering and reflection on the interface of oxide particles and air, one can increase the transparency of TiO2 coatings by forming a continuous TiO2 layer...
October 13, 2017: ACS Applied Materials & Interfaces
Tom Bolze, Jan-Lucas Wree, Florian Kanal, Domenik Schleier, Patrick Nuernberger
Tetrazolium salts are exploited in various fields of research by virtue of their low reduction potentials. Increasingly, associated applications also attend to the photochemical and luminescence properties of these systems. Here, we investigate the photo-induced dynamics of phenyl-benzo[c]tetrazolo-cinnolinium chloride (PTC), one of the very few known fluorescent tetrazolium compounds, using time-correlated single-photon counting, femtosecond fluorescence upconversion, and ultrafast transient absorption spectroscopy...
October 13, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Hui Li, Daibin Yang, Peiwu Li, Qi Zhang, Wen Zhang, Xiaoxia Ding, Jin Mao, Jing Wu
A highly sensitive aptasensor for aflatoxin M₁ (AFM₁) detection was constructed based on fluorescence resonance energy transfer (FRET) between 5-carboxyfluorescein (FAM) and palladium nanoparticles (PdNPs). PdNPs (33 nm) were synthesized through a seed-mediated growth method and exhibited broad and strong absorption in the whole ultraviolet-visible (UV-Vis) range. The strong coordination interaction between nitrogen functional groups of the AFM₁ aptamer and PdNPs brought FAM and PdNPs in close proximity, which resulted in the fluorescence quenching of FAM to a maximum extent of 95%...
October 13, 2017: Toxins
Nathan Man-Wai Wu, Maggie Ng, Wai Han Lam, Hok-Lai Wong, Vivian Wing-Wah Yam
A series of novel photochromic thieno[3,2-b]phosphole oxides has been shown to demonstrate photochromism without the need for the use of high-energy ultraviolet (UV) light irradiation while maintaining promising photochromic properties such as excellent thermal irreversibility, robust fatigue resistance, and high photoswitching efficiency. Promising visible light-induced photochromic properties have been realized by the new molecular design, in which various π systems have been incorporated into the weakly aromatic phosphole backbone instead of the conventional modification of the peripheral diaryl units that usually leads to a drastic reduction of the photochromic quantum yields (ϕO→C and ϕC→O < 0...
October 13, 2017: Journal of the American Chemical Society
Qiao Guo, Yiran Meng, Guangzhou Qu, Tiecheng Wang, Fengning Yang, Dongli Liang, Shibin Hu
Influences of discharge voltage on wheat seed vitality were investigated in a dielectric barrier discharge (DBD) plasma system at atmospheric pressure and temperature. Six different treatments were designed, and their discharge voltages were 0.0, 9.0, 11.0, 13.0, 15.0, and 17.0 kV, respectively. Fifty seeds were exposed to the DBD plasma atmosphere with an air flow rate of 1.5 L min(-1) for 4 min in each treatment, and then the DBD plasma-treated seeds were prepared for germination in several Petri dishes...
October 13, 2017: Bioelectromagnetics
Min Zhang, Jiaxu Zhu, Lei Wang, Miaoyun Xu
Plants tend to flower earlier if placed under stress conditions. Those stress factors include drought, high salinity, low temperature, high- or low-intensity light, and ultraviolet light. This phenomenon has been called stress-induced flowering. Stress-induced plant flowering might be helpful for species preservation. Thus, stress-induced flowering might have biological significance and should be considered as important as other plant flowering control strategy. Here, history of stress-induced flowering, metabolic regulation and molecular regulation mechanisms in plants were reviewed...
October 25, 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
Fei-Xia Hou, Jing Cao, Sha-Sha Wang, Xi Wang, Yuan Yuan, Cheng Peng, De-Guang Wan, Jin-Lin Guo
Ophiocordyceps sinensis is a valuable traditional Chinese medicine. Due to resource shortage, expensive price and huge market demand, there are many adulterants of O. sinensis in markets. Therefore, it is necessary to establish a rapid and effective method for distinguishing O. sinensis. Based on the species-specific PCR of O. sinensis, this study developed a detection kit by optimizing the components and evaluated the specificity, detection limit, repeatability and shelf life of the kit. The results showed that when the quality of O...
March 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Xiaoqi Sun, Xiangguang Guo, Zai-Yong Zhang, Sen Qiu, Xiang Su
An amine containing non-interpenetrated pillar-layer framework, {[Zn2(DBTCB)(L1) (1), has been synthesized from the ligands 1,4-dibromo-2,3,5,6-tetrakis(4-carboxyphenyl)benzene (H4DBTCB) and 1,4-bis(4-pyridyl)aniline (L1). The [Zn2(COO)4] secondary building units (SBUs) was bridged by DBTCB to form two-dimensional layer, further pillared by L1 to form three-dimensional network. This NH2 framework can undergo versatile tailoring through SC-SC by post synthetic covalent modification, solvent-assisted linker exchange, transmetalation reactions...
October 13, 2017: Chemistry: a European Journal
Michael R Blumhorst, Travis Mahan, Kathryn Stanley, Aaron Griffith, Mark W Collison
AOCS Official Method Ce 6-86 "Antioxidants, Liquid Chromatographic Method" was originally developed to confirm the correct antioxidant was added at the specified concentration to refined oils. Today, this method is increasingly utilized to validate that antioxidants are absent from oil products. False positive results can have a significant impact on the ability to sell products in specific markets and can impart additional business expenditures for conclusive secondary analyses. In the current work, quantification of tert-butylhydroquinone (TBHQ) in crude canola/rapeseed oil using liquid chromatography (LC) with ultraviolet (UV) detection was compromised by an interfering peak...
2017: Journal of the American Oil Chemists' Society
Jae Kyung Lee, Gun-Joo Sun, Woo Seok Lee, Soong Keun Hyun, Kyoung-Kook Kim, Seung-Bok Choi, Chongmu Lee
Short-wavelength luminescence is essential for high-performance optoelectronic device applications. There have been efforts to obtain intense ultraviolet (UV) emission by encapsulating ZnO one-dimensional (1D) nanostructures with materials such as ZnS. However, the encapsulation of ZnS 1D nanostructures with ZnO has not been reported. In this paper, we report ultraintense UV emission from ZnS nanorods coated with ZnO, i.e., ZnS-core/ZnO-shell nanorods. UV emission from the ZnS-core/ZnO-shell nanorods was much more intense than that obtained from the extensively studied ZnO-core/ZnS-shell nanorods...
October 12, 2017: Scientific Reports
Craig E Williamson, Sasha Madronich, Aparna Lal, Richard G Zepp, Robyn M Lucas, Erin P Overholt, Kevin C Rose, S Geoffrey Schladow, Julia Lee-Taylor
Climate change is accelerating the release of dissolved organic matter (DOM) to inland and coastal waters through increases in precipitation, thawing of permafrost, and changes in vegetation. Our modeling approach suggests that the selective absorption of ultraviolet radiation (UV) by DOM decreases the valuable ecosystem service wherein sunlight inactivates waterborne pathogens. Here we highlight the sensitivity of waterborne pathogens of humans and wildlife to solar UV, and use the DNA action spectrum to model how differences in water transparency and incident sunlight alter the ability of UV to inactivate waterborne pathogens...
October 12, 2017: Scientific Reports
Shakeel Ahmad Khan, Farah Noreen, Sadia Kanwal, Ahsan Iqbal, Ghulam Hussain
In the present study, green synthesis and determination of the antioxidant, antibacterial, antifungal, anticancer and photocatalytic properties of the resultant Cu-doped zinc oxide nanoparticles (NAPs) were carried out. A superficial method (solution combustion method) was employed for the synthesis of un-doped ZnO NAPs from aqueous extract of Abutilon indicum, and synthesis of Cu-doped ZnO NAPs from aqueous extracts of Clerodendrum infortunatum (M1 NAPs) and Clerodendrum inerme (M2 NAPs). The synthesized un-doped ZnO, M1 and M2 NAPs were characterized by different spectroscopic techniques like Ultraviolet-visible (UV-Vis), Fourier Transform-Infrared (FT-IR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM)...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Hun Xue, Yilan Chen, Xinping Liu, Qingrong Qian, Yongjin Luo, Malin Cui, Yisong Chen, Da-Peng Yang, Qinghua Chen
The objective of this work was to develop a novel organic-inorganic hybrid nanomaterial from agricultural biomass waste for environmental applications. The sugarcane bagasse (SB) supported TiO2 hybrids were firstly synthesized via a sol-gel method. A series of characterizations were carried out to reveal the structures and components of obtained hybrids. Due to organic-inorganic hybrid (OIH) effect and element doping, the SB-TiO2 hybrid can expand its optical absorbance ranging from ultraviolet to visible light...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Yangxian Liu, Yan Wang, Qian Wang, Jianfeng Pan, Jun Zhang
Simultaneous removal process of SO2 and NO from flue gas using vacuum ultraviolet light (VUV)/heat/peroxymonosulfate (PMS) in a VUV spraying reactor was proposed. The key influencing factors, active species, reaction products and mechanism of SO2 and NO simultaneous removal were investigated. The results show that vacuum ultraviolet light (185 nm) achieves the highest NO removal efficiency and yield of and under the same test conditions. NO removal is enhanced at higher PMS concentration, light intensity and oxygen concentration, and is inhibited at higher NO concentration, SO2 concentration and solution pH...
October 3, 2017: Chemosphere
Yue Liang, Wei Xiong, Siegrid Steinkellner, Jie Feng
The fungus Sclerotinia sclerotiorum is a necrotrophic plant pathogen causing significant damage on a broad range of crops. This fungus produces sclerotia that serve as the long-term survival structures in the life cycle and the primary inoculum in the disease cycle. Melanin plays an important role for protecting mycelia and sclerotia from ultraviolet radiation and other adverse environmental conditions. In this study two genes, SCD1 encoding a scytalone dehydratase and THR1 encoding a trihydroxynaphthalene reductase, were disrupted by target gene replacement and their roles in mycelial growth, sclerotial development and fungal pathogenicity were investigated...
October 11, 2017: Molecular Plant Pathology
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