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https://www.readbyqxmd.com/read/28346906/long-term-exposure-to-high-air-pollution-induces-cumulative-dna-damages-in-traffic-policemen
#1
Chaochao Tan, Shijie Lu, Yupeng Wang, Yan Zhu, Ting Shi, Mingyue Lin, Zhonghua Deng, Zhu Wang, Nana Song, Shuna Li, Pingting Yang, Liyan Yang, Yuanyuan Liu, Zhiheng Chen, Keqian Xu
The specific effects of long-term exposure to high air pollution on human health and biological remain unclear. To explore the adverse health effects as well as biological mechanisms and biomarkers for durative exposure to air pollution, 183 traffic policemen and 88 office policemen were enrolled in this study. The concentration of PM2.5 in both the traffic and office policemen's working environments were obtained. Detailed personal questionnaires were completed and levels of inflammation, oxidative stress and DNA damage markers of all participants were analyzed in this study...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28346902/in-situ-synthesis-of-cobalt-ferrites-embedded-hollow-n-doped-carbon-as-an-outstanding-catalyst-for-elimination-of-organic-pollutants
#2
Tao Zeng, Mingdong Yu, Haiyan Zhang, Zhiqiao He, Xiaole Zhang, Jianmeng Chen, Shuang Song
Using polydopamine-metal ions complex as precursor, hollow mesoporous N-doped carbon microspheres encapsulating spinel ferrites nanocrystals (HM-NC/CoFe2O4) were facilely prepared with the aim of creating a novel heterogeneous catalyst for sulfate radical-based oxidation of organic contaminants. The surface morphology, structure and composition of HM-NC/CoFe2O4 catalyst were thoroughly investigated. The applicability of the catalyst was systematically assessed through numerous controlled trials, several operating parameters, as well as different model pollutants by means of peroxymonosulfate (PMS) activation...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28346838/hiv-1-transmission-networks-across-south-korea
#3
Mi Young Ahn, Joel O Wertheim, Woo Joo Kim, Shin-Woo Kim, Jin Soo Lee, Hea Won Ann, Yongduk Jeon, Jin Young Ahn, Je Eun Song, Dong Hyun Oh, Yong Chan Kim, Eun Jin Kim, In Young Jung, Moo Hyun Kim, Wooyoung Jeong, Su Jin Jeong, Nam Su Ku, June Myung Kim, Davey M Smith, Jun Yong Choi
Molecular epidemiology can help clarify the properties and dynamics of HIV-1 transmission networks in both global and regional scales. We studied 143 HIV-1-infected individuals recruited from four medical centers of three cities in South Korea between April 2013 and May 2014. HIV-1 env V3 sequence data were generated (337-793 bp) and analyzed using a pairwise distance-based clustering approach to infer putative transmission networks. Participants whose viruses were ≤2.0% divergent according to Tamura-Nei 93 genetic distance were defined as clustering...
March 27, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28346809/malat1-promotes-osteosarcoma-development-by-regulation-of-hmgb1-via-mir-142-3p-and-mir-129-5p
#4
Ke Liu, Jun Huang, Jiangdong Ni, Deye Song, Muliang Ding, Junjie Wang, Xianzhe Huang, Wenzhao Li
Recently, emerging evidence has demonstrated that metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), a long non-coding RNAs (lncRNAs), contributes to the initiation and development of tumors, including osteosarcoma (OS). Multiple studies have suggested an oncogenic role of MALAT1 and high-mobility group protein B1 (HMGB1) in OS tumorigenesis and metastasis, but the effects and mechanisms are not unanimous. Here, we showed that MALAT1 and HMGB1 were significantly increased in human OS cell lines and knockdown of MALAT1 reduced HMGB1 expression...
March 19, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28346731/exploring-the-influence-of-mpa-capped-cdte-quantum-dots-on-the-structure-and-function-of-lysozyme-probing-by-spectroscopic-and-calorimetric-methods
#5
Lining Zhao, Tao Sun, Xun Zhang, Wei Song, Rutao Liu
The effect of 3-mercaptopropionic acid (MPA)-capped CdTe quantum dots (QDs) on lysozyme was systematically investigated by spectroscopic methods, enzyme activity assay, and calorimetry techniques. Results show that the MPA-capped CdTe QDs binded to lysozyme through van der Walls forces and hydrogen bondings, causing the decrement of α-helical content (∼7%) and increment of β-sheet content (∼11%) of lysozyme. The binding caused static quenching of the fluorescence, while the microenvironment of aromatic amino acid residues did not show any significant alteration...
March 27, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28346515/gender-differences-in-reward-and-punishment-for-monetary-and-social-feedback-in-children-an-erp-study
#6
Ying Ding, Encong Wang, Yuchen Zou, Yan Song, Xue Xiao, Wanyi Huang, Yanfang Li
Gender differences in feedback processing have been observed among adolescents and adults through event-related potentials. However, information on whether and how this feedback processing is affected by feedback valence, feedback type, and individual sensitivity in reward/punishment among children remains minimal. In this study, we used a guessing game task coupled with electroencephalography to investigate gender differences in feedback processing, in which feedback to reward and punishment was presented in the context of monetary and social conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28346463/changes-in-soil-bacterial-community-structure-as-a-result-of-incorporation-of-brassica-plants-compared-with-continuous-planting-eggplant-and-chemical-disinfection-in-greenhouses
#7
Tianzhu Li, Tongtong Liu, Chengyu Zheng, Chunsheng Kang, Zichao Yang, Xiaotong Yao, Fengbin Song, Runzhi Zhang, Xuerong Wang, Ning Xu, Chunyi Zhang, Wei Li, Shumin Li
Greenhouse eggplant monocropping in China has contributed to the aggravation of soil-borne diseases, reductions in crop quality and yield, and the degradation of physical and chemical soil properties. Crop rotation is one effective way of alleviating the problems of continuous cropping worldwide; however, few studies have reported changes in soil bacterial community structures and physical and chemical soil properties after Brassica vegetables had been rotated with eggplant in greenhouses. In this experiment, mustard-eggplant (BFN) and oilseed rape-eggplant (BFC) rotations were studied to identify changes in the physicochemical properties and bacterial community structure in soil that was previously subject to monocropping...
2017: PloS One
https://www.readbyqxmd.com/read/28346458/revealing-the-reaction-mechanisms-of-li-o2-batteries-using-environmental-transmission-electron-microscopy
#8
Langli Luo, Bin Liu, Shidong Song, Wu Xu, Ji-Guang Zhang, Chongmin Wang
The performances of a Li-O2 battery depend on a complex interplay between the reaction mechanism at the cathode, the chemical structure and the morphology of the reaction products, and their spatial and temporal evolution; all parameters that, in turn, are dependent on the choice of the electrolyte. In an aprotic cell, for example, the discharge product, Li2O2, forms through a combination of solution and surface chemistries that results in the formation of a baffling toroidal morphology. In a solid electrolyte, neither the reaction mechanism at the cathode nor the nature of the reaction product is known...
March 27, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28346453/activity-induced-histone-modifications-govern-neurexin-1-mrna-splicing-and-memory-preservation
#9
Xinlu Ding, Sanxiong Liu, Miaomiao Tian, Wenhao Zhang, Tao Zhu, Dongdong Li, Jiawei Wu, HaiTeng Deng, Yichang Jia, Wei Xie, Hong Xie, Ji-Song Guan
Epigenetic mechanisms regulate the formation, consolidation and reconsolidation of memories. However, the signaling path from neuronal activation to epigenetic modifications within the memory-related brain circuit remains unknown. We report that learning induces long-lasting histone modifications in hippocampal memory-activated neurons to regulate memory stability. Neuronal activity triggers a late-onset shift in Nrxn1 splice isoform choice at splicing site 4 by accumulating a repressive histone marker, H3K9me3, to modulate the splicing process...
March 27, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28346442/identification-of-12-new-susceptibility-loci-for-different-histotypes-of-epithelial-ovarian-cancer
#10
Catherine M Phelan, Karoline B Kuchenbaecker, Jonathan P Tyrer, Siddhartha P Kar, Kate Lawrenson, Stacey J Winham, Joe Dennis, Ailith Pirie, Marjorie J Riggan, Ganna Chornokur, Madalene A Earp, Paulo C Lyra, Janet M Lee, Simon Coetzee, Jonathan Beesley, Lesley McGuffog, Penny Soucy, Ed Dicks, Andrew Lee, Daniel Barrowdale, Julie Lecarpentier, Goska Leslie, Cora M Aalfs, Katja K H Aben, Marcia Adams, Julian Adlard, Irene L Andrulis, Hoda Anton-Culver, Natalia Antonenkova, Gerasimos Aravantinos, Norbert Arnold, Banu K Arun, Brita Arver, Jacopo Azzollini, Judith Balmaña, Susana N Banerjee, Laure Barjhoux, Rosa B Barkardottir, Yukie Bean, Matthias W Beckmann, Alicia Beeghly-Fadiel, Javier Benitez, Marina Bermisheva, Marcus Q Bernardini, Michael J Birrer, Line Bjorge, Amanda Black, Kenneth Blankstein, Marinus J Blok, Clara Bodelon, Natalia Bogdanova, Anders Bojesen, Bernardo Bonanni, Åke Borg, Angela R Bradbury, James D Brenton, Carole Brewer, Louise Brinton, Per Broberg, Angela Brooks-Wilson, Fiona Bruinsma, Joan Brunet, Bruno Buecher, Ralf Butzow, Saundra S Buys, Trinidad Caldes, Maria A Caligo, Ian Campbell, Rikki Cannioto, Michael E Carney, Terence Cescon, Salina B Chan, Jenny Chang-Claude, Stephen Chanock, Xiao Qing Chen, Yoke-Eng Chiew, Jocelyne Chiquette, Wendy K Chung, Kathleen B M Claes, Thomas Conner, Linda S Cook, Jackie Cook, Daniel W Cramer, Julie M Cunningham, Aimee A D'Aloisio, Mary B Daly, Francesca Damiola, Sakaeva Dina Damirovna, Agnieszka Dansonka-Mieszkowska, Fanny Dao, Rosemarie Davidson, Anna DeFazio, Capucine Delnatte, Kimberly F Doheny, Orland Diez, Yuan Chun Ding, Jennifer Anne Doherty, Susan M Domchek, Cecilia M Dorfling, Thilo Dörk, Laure Dossus, Mercedes Duran, Matthias Dürst, Bernd Dworniczak, Diana Eccles, Todd Edwards, Ros Eeles, Ursula Eilber, Bent Ejlertsen, Arif B Ekici, Steve Ellis, Mingajeva Elvira, Kevin H Eng, Christoph Engel, D Gareth Evans, Peter A Fasching, Sarah Ferguson, Sandra Fert Ferrer, James M Flanagan, Zachary C Fogarty, Renée T Fortner, Florentia Fostira, William D Foulkes, George Fountzilas, Brooke L Fridley, Tara M Friebel, Eitan Friedman, Debra Frost, Patricia A Ganz, Judy Garber, María J García, Vanesa Garcia-Barberan, Andrea Gehrig, Aleksandra Gentry-Maharaj, Anne-Marie Gerdes, Graham G Giles, Rosalind Glasspool, Gord Glendon, Andrew K Godwin, David E Goldgar, Teodora Goranova, Martin Gore, Mark H Greene, Jacek Gronwald, Stephen Gruber, Eric Hahnen, Christopher A Haiman, Niclas Håkansson, Ute Hamann, Thomas V O Hansen, Patricia A Harrington, Holly R Harris, Jan Hauke, Alexander Hein, Alex Henderson, Michelle A T Hildebrandt, Peter Hillemanns, Shirley Hodgson, Claus K Høgdall, Estrid Høgdall, Frans B L Hogervorst, Helene Holland, Maartje J Hooning, Karen Hosking, Ruea-Yea Huang, Peter J Hulick, Jillian Hung, David J Hunter, David G Huntsman, Tomasz Huzarski, Evgeny N Imyanitov, Claudine Isaacs, Edwin S Iversen, Louise Izatt, Angel Izquierdo, Anna Jakubowska, Paul James, Ramunas Janavicius, Mats Jernetz, Allan Jensen, Uffe Birk Jensen, Esther M John, Sharon Johnatty, Michael E Jones, Päivi Kannisto, Beth Y Karlan, Anthony Karnezis, Karin Kast, Catherine J Kennedy, Elza Khusnutdinova, Lambertus A Kiemeney, Johanna I Kiiski, Sung-Won Kim, Susanne K Kjaer, Martin Köbel, Reidun K Kopperud, Torben A Kruse, Jolanta Kupryjanczyk, Ava Kwong, Yael Laitman, Diether Lambrechts, Nerea Larrañaga, Melissa C Larson, Conxi Lazaro, Nhu D Le, Loic Le Marchand, Jong Won Lee, Shashikant B Lele, Arto Leminen, Dominique Leroux, Jenny Lester, Fabienne Lesueur, Douglas A Levine, Dong Liang, Clemens Liebrich, Jenna Lilyquist, Loren Lipworth, Jolanta Lissowska, Karen H Lu, Jan Lubinński, Craig Luccarini, Lene Lundvall, Phuong L Mai, Gustavo Mendoza-Fandiño, Siranoush Manoukian, Leon F A G Massuger, Taymaa May, Sylvie Mazoyer, Jessica N McAlpine, Valerie McGuire, John R McLaughlin, Iain McNeish, Hanne Meijers-Heijboer, Alfons Meindl, Usha Menon, Arjen R Mensenkamp, Melissa A Merritt, Roger L Milne, Gillian Mitchell, Francesmary Modugno, Joanna Moes-Sosnowska, Melissa Moffitt, Marco Montagna, Kirsten B Moysich, Anna Marie Mulligan, Jacob Musinsky, Katherine L Nathanson, Lotte Nedergaard, Roberta B Ness, Susan L Neuhausen, Heli Nevanlinna, Dieter Niederacher, Robert L Nussbaum, Kunle Odunsi, Edith Olah, Olufunmilayo I Olopade, Håkan Olsson, Curtis Olswold, David M O'Malley, Kai-Ren Ong, N Charlotte Onland-Moret, Nicholas Orr, Sandra Orsulic, Ana Osorio, Domenico Palli, Laura Papi, Tjoung-Won Park-Simon, James Paul, Celeste L Pearce, Inge Søkilde Pedersen, Petra H M Peeters, Bernard Peissel, Ana Peixoto, Tanja Pejovic, Liisa M Pelttari, Jennifer B Permuth, Paolo Peterlongo, Lidia Pezzani, Georg Pfeiler, Kelly-Anne Phillips, Marion Piedmonte, Malcolm C Pike, Anna M Piskorz, Samantha R Poblete, Timea Pocza, Elizabeth M Poole, Bruce Poppe, Mary E Porteous, Fabienne Prieur, Darya Prokofyeva, Elizabeth Pugh, Miquel Angel Pujana, Pascal Pujol, Paolo Radice, Johanna Rantala, Christine Rappaport-Fuerhauser, Gad Rennert, Kerstin Rhiem, Patricia Rice, Andrea Richardson, Mark Robson, Gustavo C Rodriguez, Cristina Rodríguez-Antona, Jane Romm, Matti A Rookus, Mary Anne Rossing, Joseph H Rothstein, Anja Rudolph, Ingo B Runnebaum, Helga B Salvesen, Dale P Sandler, Minouk J Schoemaker, Leigha Senter, V Wendy Setiawan, Gianluca Severi, Priyanka Sharma, Tameka Shelford, Nadeem Siddiqui, Lucy E Side, Weiva Sieh, Christian F Singer, Hagay Sobol, Honglin Song, Melissa C Southey, Amanda B Spurdle, Zsofia Stadler, Doris Steinemann, Dominique Stoppa-Lyonnet, Lara E Sucheston-Campbell, Grzegorz Sukiennicki, Rebecca Sutphen, Christian Sutter, Anthony J Swerdlow, Csilla I Szabo, Lukasz Szafron, Yen Y Tan, Jack A Taylor, Muy-Kheng Tea, Manuel R Teixeira, Soo-Hwang Teo, Kathryn L Terry, Pamela J Thompson, Liv Cecilie Vestrheim Thomsen, Darcy L Thull, Laima Tihomirova, Anna V Tinker, Marc Tischkowitz, Silvia Tognazzo, Amanda Ewart Toland, Alicia Tone, Britton Trabert, Ruth C Travis, Antonia Trichopoulou, Nadine Tung, Shelley S Tworoger, Anne M van Altena, David Van Den Berg, Annemarie H van der Hout, Rob B van der Luijt, Mattias Van Heetvelde, Els Van Nieuwenhuysen, Elizabeth J van Rensburg, Adriaan Vanderstichele, Raymonda Varon-Mateeva, Ana Vega, Digna Velez Edwards, Ignace Vergote, Robert A Vierkant, Joseph Vijai, Athanassios Vratimos, Lisa Walker, Christine Walsh, Dorothea Wand, Shan Wang-Gohrke, Barbara Wappenschmidt, Penelope M Webb, Clarice R Weinberg, Jeffrey N Weitzel, Nicolas Wentzensen, Alice S Whittemore, Juul T Wijnen, Lynne R Wilkens, Alicja Wolk, Michelle Woo, Xifeng Wu, Anna H Wu, Hannah Yang, Drakoulis Yannoukakos, Argyrios Ziogas, Kristin K Zorn, Steven A Narod, Douglas F Easton, Christopher I Amos, Joellen M Schildkraut, Susan J Ramus, Laura Ottini, Marc T Goodman, Sue K Park, Linda E Kelemen, Harvey A Risch, Mads Thomassen, Kenneth Offit, Jacques Simard, Rita Katharina Schmutzler, Dennis Hazelett, Alvaro N Monteiro, Fergus J Couch, Andrew Berchuck, Georgia Chenevix-Trench, Ellen L Goode, Thomas A Sellers, Simon A Gayther, Antonis C Antoniou, Paul D P Pharoah
To identify common alleles associated with different histotypes of epithelial ovarian cancer (EOC), we pooled data from multiple genome-wide genotyping projects totaling 25,509 EOC cases and 40,941 controls. We identified nine new susceptibility loci for different EOC histotypes: six for serous EOC histotypes (3q28, 4q32.3, 8q21.11, 10q24.33, 18q11.2 and 22q12.1), two for mucinous EOC (3q22.3 and 9q31.1) and one for endometrioid EOC (5q12.3). We then performed meta-analysis on the results for high-grade serous ovarian cancer with the results from analysis of 31,448 BRCA1 and BRCA2 mutation carriers, including 3,887 mutation carriers with EOC...
March 27, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28346409/the-metabolic-er-stress-sensor-ire1%C3%AE-suppresses-alternative-activation-of-macrophages-and-impairs-energy-expenditure-in-obesity
#11
Bo Shan, Xiaoxia Wang, Ying Wu, Chi Xu, Zhixiong Xia, Jianli Dai, Mengle Shao, Feng Zhao, Shengqi He, Liu Yang, Mingliang Zhang, Fajun Nan, Jia Li, Jianmiao Liu, Jianfeng Liu, Weiping Jia, Yifu Qiu, Baoliang Song, Jing-Dong J Han, Liangyou Rui, Sheng-Zhong Duan, Yong Liu
Obesity is associated with metabolic inflammation and endoplasmic reticulum (ER) stress, both of which promote metabolic disease progression. Adipose tissue macrophages (ATMs) are key players orchestrating metabolic inflammation, and ER stress enhances macrophage activation. However, whether ER stress pathways underlie ATM regulation of energy homeostasis remains unclear. Here, we identified inositol-requiring enzyme 1α (IRE1α) as a critical switch governing M1-M2 macrophage polarization and energy balance...
March 27, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28346343/lifetime-exposure-to-a-constant-environment-amplifies-the-impact-of-a-fructose-rich-diet-on-glucose-homeostasis-during-pregnancy
#12
Aleida Song, Stuart Astbury, Abha Hoedl, Brent Nielsen, Michael E Symonds, Rhonda C Bell
The need to refine rodent models of human-related disease is now being recognized, in particular the rearing environment that can profoundly modulate metabolic regulation. Most studies on pregnancy and fetal development purchase and transport young females into the research facility, which after a short period of acclimation are investigated (Gen0). We demonstrate that female offspring (Gen1) show an exaggerated hyperinsulinemic response to pregnancy when fed a standard diet and with high fructose intake, which continues throughout pregnancy...
March 25, 2017: Nutrients
https://www.readbyqxmd.com/read/28346260/effectiveness-analysis-of-a-part-time-rapid-response-system-during-operation-versus-nonoperation
#13
Youlim Kim, Dong Seon Lee, Hyunju Min, Yun Young Choi, Eun Young Lee, Inae Song, Jong Sun Park, Young-Jae Cho, You Hwan Jo, Ho Il Yoon, Jae Ho Lee, Choon-Taek Lee, Sang Hwan Do, Yeon Joo Lee
OBJECTIVES: To evaluate the effect of a part-time rapid response system on the occurrence rate of cardiopulmonary arrest by comparing the times of rapid response system operation versus nonoperation. DESIGN: Retrospective cohort study. SETTING: A 1,360-bed tertiary care hospital. PATIENTS: Adult patients admitted to the general ward were screened. Data were collected over 36 months from rapid response system implementation (October 2012 to September 2015) and more than 45 months before rapid response system implementation (January 2009 to September 2012)...
March 24, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28346140/em-connectomics-reveals-axonal-target-variation-in-a-sequence-generating-network
#14
Jörgen Kornfeld, Sam E Benezra, Rajeevan T Narayanan, Fabian Svara, Robert Egger, Marcel Oberlaender, Winfried Denk, Michael A Long
The sequential activation of neurons has been observed in various areas of the brain, but in no case is the underlying network structure well understood. Here we examined the circuit anatomy of zebra finch HVC, a cortical region that generates sequences underlying the temporal progression of the song. We combined serial block-face electron microscopy with light microscopy to determine the cell types targeted by HVC(RA) neurons, which control song timing. Close to their soma, axons almost exclusively targeted inhibitory interneurons, consistent with what had been found with electrical recordings from pairs of cells...
March 27, 2017: ELife
https://www.readbyqxmd.com/read/28346112/a-growing-disconnection-from-nature-is-evident-in-cultural-products
#15
Selin Kesebir, Pelin Kesebir
Human connection with nature is widely believed to be in decline even though empirical evidence is scarce on the magnitude and historical pattern of the change. Studying works of popular culture in English throughout the 20th century and later, we have documented a cultural shift away from nature that begins in the 1950s. Since then, references to nature have been decreasing steadily in fiction books, song lyrics, and film storylines, whereas references to the human-made environment have not. The observed temporal pattern is consistent with the explanatory role of increased virtual and indoors recreation options (e...
March 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/28345922/the-synthetic-access-toward-cycloastragenol-glycosides
#16
Ting Liu, Jin-Xi Liao, Yang Hu, Yuan-Hong Tu, Jian-Song Sun
The first efficient synthetic approach toward four types of the cycloartane glycosides, the cycloastragenol 25-O, 3-O, 3,6-O-bis, and 3,25-O-bisglycoside, have been established, which featured the PPY-mediated, concentration-controlled acetylation and Au(I)-catalyzed Yu glycosylation. Through the synthetic investigation, the reactivity sequence of the four OHs in cycloastragenol was fixed for the first time and a detour strategy for the highly efficient removal of bulky pivaloyl protecting groups was discovered...
March 27, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28345893/fluorescent-recognition-of-zn-2-by-two-diastereomeric-salicylaldimines-dramatically-different-responses-and-spectroscopic-investigation
#17
Ting Song, Yuan Cao, Gang Zhao, Lin Pu
Fluorescence responses of two BINOL-based diastereomeric salicylaldimines toward a variety of metal cations have been studied in methanol solution. It is revealed that both compounds show great fluorescence enhancements in the presence of Zn(2+) but not with any other metal ions. Moreover, these two diastereomers exhibit dramatically different responses toward Zn(2+) under the same conditions. That is, one can produce much stronger fluorescence enhancement also at a longer wavelength than the other. This fluorescence recognition of Zn(2+) also shows distinctive color changes under a UV lamp...
March 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28345873/impact-of-semiconducting-perylene-diimide-nanoparticle-size-on-lymph-node-mapping-and-cancer-imaging
#18
Zhen Yang, Rui Tian, Jinjun Wu, Quli Fan, Bryant C Yung, Gang Niu, Orit Jacobson, Zhantong Wang, Gang Liu, Guocan Yu, Wei Huang, Jibin Song, Xiaoyuan Chen
Semiconducting molecules of perylene diimide (PDI) with strong light absorption property in the near-infrared region and good biocompatibility have received increasing attention in the field of theranostics, especially as photoacoustic (PA) imaging agents. Herein, we report a series of [64Cu]-labeled PDI nanoparticles (NPs) of different sizes (30, 60, 100 and 200 nm) as dual positron emission tomography (PET) and PA imaging probes and photothermal therapy agents. The precise size control of the PDI NPs can be achieved by adjusting the initial concentration of PDI molecules in the self-assembly process, and the photophysical property of different sized PDI NPs was studied in detail...
March 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28345715/ultralow-power-near-infrared-excited-neodymium-doped-nanoparticles-for-long-term-in-vivo-bioimaging
#19
Qing-Song Qin, Pei-Zhi Zhang, Ling-Dong Sun, Shuo Shi, Nai-Xiu Chen, Hao Dong, Xiao-Yu Zheng, Le-Min Li, Chun-Hua Yan
Lanthanide-doped luminescent nanoparticles with both emission and excitation in the near-infrared (NIR-to-NIR) region hold great promise for bioimaging. Herein, core@shell structured LiLuF4:Nd@LiLuF4 (named as Nd@Lu) nanoparticles (NPs) with highly efficient NIR emission were developed for high-performance in vivo bioimaging. Strikingly, the absolute quantum yield of Nd@Lu NPs reached as high as 32%. After coating with polyethylene glycol (PEG), the water-dispersible Nd@Lu NPs showed good bio-compatibility and low toxicity...
March 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/28345652/synergistic-infection-of-bryv-and-pemv-2-increases-the-accumulations-of-both-bryv-and-bryv-derived-sirnas-in-nicotiana-benthamiana
#20
Cui-Ji Zhou, Xiao-Yan Zhang, Song-Yu Liu, Ying Wang, Da-Wei Li, Jia-Lin Yu, Cheng-Gui Han
Viral synergism is caused by co-infection of two unrelated viruses, leading to more severe symptoms or increased titres of one or both viruses. Synergistic infection of phloem-restricted poleroviruses and umbraviruses has destructive effects on crop plants. The mechanism underlying this synergy remains elusive. In our study, synergism was observed in co-infections of a polerovirus Brassica yellows virus (BrYV) and an umbravirus Pea enation mosaic virus 2 (PEMV 2) on Nicotiana benthamiana, which led to (1) increased titres of BrYV, (2) appearance of severe symptoms, (3) gain of mechanical transmission capacity of BrYV, (4) broader distribution of BrYV to non-vascular tissues...
March 27, 2017: Scientific Reports
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