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https://www.readbyqxmd.com/read/28635999/carbon-dots-promoted-vanadium-flow-batteries-for-all-climate-energy-storage
#1
Ying Zhou, Le Liu, Yi Shen, Lantao Wu, Lihong Yu, Feng Liang, Jingyu Xi
We report a one-pot solvothermal method to prepare a carbon dots decorated graphite felt (CDs/GF) electrode. The resulting CDs/GF shows excellent wettability and greatly enhanced activity towards vanadium redox couples. VFB with the CDs/GF electrode exhibits outstanding rate performance, superior cycling stability, and broad temperature adaptability from -20 to 60 °C.
June 21, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28634461/sensitivity-to-acceleration-in-the-human-early-visual-system
#2
Ryohei Nakayama, Isamu Motoyoshi
It is widely believed that the human visual system is insensitive to acceleration in moving stimuli. This notion is supported by evidence that detection sensitivity for velocity modulation in moving stimuli is a lowpass function of the velocity modulation's temporal frequency. However, the lowpass function might be a mixture of detection by attention-based tracking and low-level mechanisms sensitive to acceleration. To revisit the issue of acceleration perception in relation to attentive tracking, we measured detection sensitivities for velocity modulations at various temporal frequencies (0...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28634114/peanut-digestome-identification-of-digestion-resistant-ige-binding-peptides
#3
Luigia Di Stasio, Gianluca Picariello, Mariantonietta Mongiello, Rita Nocerino, Roberto Berni Canani, Simona Bavaro, Linda Monaci, Pasquale Ferranti, Gianfranco Mamone
Stability to proteolytic degradation in the digestive tract is considered a general feature shared by most food allergens. Current digestibility models exclusively utilize purified allergen proteins, neglecting the relevant effects of matrix that occur for foodstuff systems. In the present study, we investigated digestion stability of the major peanut allergens directly in the natural matrix using an in vitro static model that simulates the gastrointestinal digestion including the oral, gastric, duodenal and intestinal (brush border membrane enzymes) phases...
June 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28633972/the-neural-basis-of-form-and-form-motion-integration-from-static-and-dynamic-translational-glass-patterns-a-rtms-investigation
#4
Andrea Pavan, Filippo Ghin, Rita Donato, Gianluca Campana, George Mather
A long-held view of the visual system is that form and motion are independently analysed. However, there is physiological and psychophysical evidence of early interaction in the processing of form and motion. In this study, we used a combination of Glass patterns (GPs) and repetitive Transcranial Magnetic Stimulation (rTMS) to investigate in human observers the neural mechanisms underlying form-motion integration. GPs consist of randomly distributed dot pairs (dipoles) that induce the percept of an oriented stimulus...
June 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28633829/different-valence-sn-doping-a-simple-way-to-detect-oxygen-concentration-variation-of-zno-quantum-dots-synthesized-under-ultrasonic-irradiation
#5
Weimin Yang, Bing Zhang, Qitu Zhang, Lixi Wang, Bo Song, Fan Wu, C P Wong
An ultrasonic method is employed to synthesize the Sn doped Zn0.95Sn0.05O quantum dots with green light emission. Sn(2+) and Sn(4+) ions are used to create different optical defects inside Zn0.95Sn0.05O quantum dots and the changing trend of oxygen concentration under different ultrasonic irradiation power are investigated. The photoluminescence spectra are employed to characterize the optical defects of Zn0.95Sn0.05O quantum dots. The UV-vis spectra are used to study the band gap of Zn0.95Sn0.05O quantum dots, which is influenced by their sizes...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633700/trends-in-drug-resistant-tuberculosis-after-the-implementation-of-the-dots-strategy-in-shenzhen-china-2000-2013
#6
L Zhu, Y-Z Yang, H-Y Guan, S-M Cheng, Y-Y Jin, W-G Tan, Q-F Wu, X-L Liu, M-G Zhao, Z-H Lu, Z-W Jia
SETTING: The DOTS strategy has been regarded as the most cost-effective way to stop the spread of tuberculosis (TB) since its launch by the World Health Organization. OBJECTIVE: To estimate the effects of DOTS by tracking long-term trends in multidrug-resistant TB (MDR-TB). DESIGN: A retrospective cohort study was conducted from 2000 to 2013 to analyse trends in resistance to anti-tuberculosis drugs and the effect of DOTS-based treatment in Shenzhen, China, using the χ2 test...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28633199/diffuse-type-caroli-disease-with-characteristic-central-dot-sign-complicated-by-multiple-intrahepatic-and-common-bile-duct-stones
#7
Moon Joo Hwang, Tae Nyeun Kim
Caroli disease (CD) is a rare congenital malformation of the liver characterized by non-obstructive, segmental, cystic dilatation of the intrahepatic bile ducts (IHDs). The clinical course is usually asymptomatic for the first 5-20 years, and symptoms may seldom occur throughout the patient's life. Bile stagnation leads to recurrent episodes of cholangitis, stone formation, or liver abscesses, and biliary cirrhosis usually occurs years later. Here we report on a 42-year-old man diagnosed with diffuse-type CD with a characteristic central dot sign, who had multiple intrahepatic and common bile duct (CBD) stones...
June 20, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28632165/fano-effect-and-quantum-entanglement-in-hybrid-semiconductor-quantum-dot-metal-nanoparticle-system
#8
REVIEW
Yong He, Ka-Di Zhu
In this paper, we review the investigation for the light-matter interaction between surface plasmon field in metal nanoparticle (MNP) and the excitons in semiconductor quantum dots (SQDs) in hybrid SQD-MNP system under the full quantum description. The exciton-plasmon interaction gives rise to the modified decay rate and the exciton energy shift which are related to the exciton energy by using a quantum transformation method. We illustrate the responses of the hybrid SQD-MNP system to external field, and reveal Fano effect shown in the absorption spectrum...
June 20, 2017: Sensors
https://www.readbyqxmd.com/read/28631480/fully-transparent-quantum-dot-light-emitting-diode-with-a-laminated-top-graphene-anode
#9
Li Yao, Xin Fang, Wei Gu, Wenhao Zhai, Yi Wan, Xixi Xie, Wanjin Xu, Xiaodong Pi, Guangzhao Ran, Guogang Qin
A new method to employ graphene as top electrode was introduced, and based on that, fully transparent quantum dot light emitting diodes (T-QLEDs) were sucessfully fabribated through a lamination process. We adopted the widely used wet transfer method to transfer bilayer graphene (BG) on polydimethylsiloxane/polyethylene terephthalate (PDMS/PET) substrate. The sheet resistance of graphene reduced to ~540 Ω/□ through transferring BG for 3 times on the PDMS/PET. The T-QLED has an inverted device structure of glass/Indium tin oxide (ITO)/ZnO nanoparticles (NPs)/(CdSSe/ZnS quantum dots (QDs))/ 1,1-bis[(di-4-tolylamino)phenyl] cyclohexane (TAPC)/MoO3/ graphene/PDMS/PET...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28631467/quantum-dots-facilitated-printing-of-zno-nanostructure-photodetectors-with-improved-performance
#10
Brent Cook, Qingfeng Liu, Maogang Gong, Dan Ewing, Matthew Casper, Alex Stramel, Judy Z Wu
A nanocomposite ink composed of zinc oxide precursor (ZnOPr) and crystalline ZnO quantum dots (ZnOPrQDs) has been explored for printing high-performance ultraviolet (UV) photodetectors. The performance of the devices has been compared with their counterparts' printed from ZnOPr ink without ZnO QDs. Remarkably, higher UV photoresponsivity of 383.6 A/W and the on/off ratio of 2470 are observed in the former, which are significantly better than 14.7 A/W and 949 in the latter. The improved performance is attributed to the increased viscosity in the nanocomposite ink to enable a nanoporous structure with improved crystallinity and surface-to-volume ratio...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28630898/polymeric-lithography-editor-editing-lithographic-errors-with-nanoporous-polymeric-probes
#11
Pradeep Ramiah Rajasekaran, Chuanhong Zhou, Mallika Dasari, Kay-Obbe Voss, Christina Trautmann, Punit Kohli
A new lithographic editing system with an ability to erase and rectify errors in microscale with real-time optical feedback is demonstrated. The erasing probe is a conically shaped hydrogel (tip size, ca. 500 nm) template-synthesized from track-etched conical glass wafers. The "nanosponge" hydrogel probe "erases" patterns by hydrating and absorbing molecules into a porous hydrogel matrix via diffusion analogous to a wet sponge. The presence of an interfacial liquid water layer between the hydrogel tip and the substrate during erasing enables frictionless, uninterrupted translation of the eraser on the substrate...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28629971/survey-of-pathogens-in-threatened-wild-red-tailed-amazon-parrot-amazona-brasiliensis-nestlings-in-rasa-island-brazil
#12
Frederico Fontanelli Vaz, Patrícia Pereira Serafini, Rosangela Locatelli-Dittrich, Rafael Meurer, Edison Luiz Durigon, Jansen de Araújo, Luciano Matsumiya Thomazelli, Tatiana Ometto, Elenise Angelotti Bastos Sipinski, Rafael Meirelles Sezerban, Maria Cecília Abbud, Tânia Freitas Raso
The red-tailed Amazon parrot (Amazona brasiliensis) is a threatened species of psittacine bird that inhabit coastal regions of Brazil. In view of the threat of this species, the aim of this study was to perform a health evaluation in wild nestlings in Rasa Island, determining the prevalence of enterobacteria and infectious agents according to type of nest. Blood samples were collected from 64 birds and evaluated for antibodies of Chlamydia psittaci by commercial dot-blot ELISA. Cloacal and oropharyngeal swabs samples were collected from 23 birds from artificial wooden nests, 15 birds from PVC nests and 2 birds from natural nests for microbiological analysis...
June 3, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28629487/learning-and-memory-in-adolescents-with-critical-biventricular-congenital-heart-disease
#13
Adam R Cassidy, Jane W Newburger, David C Bellinger
OBJECTIVES: Although evidence exists of broadly defined memory impairment among adolescents with critical congenital heart disease (CHD), nuanced investigations of declarative memory in this at-risk population have not been conducted. This study had two primary aims: (1) to conduct a fine-grained analysis of a range of relevant learning and memory processes in adolescents with critical biventricular CHD, and (2) to identify risk, odds, and predictors of memory impairment. METHODS: Data were combined from two single-center studies of neurodevelopmental outcomes in critical CHD...
June 20, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28629078/fluorescent-cds-pcl-hybrids-via-tartaric-acid-cds-cocatalyzed-polymerization
#14
Manqing Yan, Mingchen Zhou, Jing Chen, Tianlei Zhao, Longxiang Tang, Hong Bi
In this paper, the environment-friendly, water-soluble carbon dots (CDs) with stable photoluminescence (PL) have been prepared via the one-step pyrolysis of lotus leaf. Then the as-prepared CDs containing abundant hydroxylic and carboxylic groups were employed as cocatalyst with tartaric acid (TA) in ring-opening polymerization (ROP) of ε-caprolactone (ε-CL). The low-toxic organic acid TA, as main catalyst, was used to catalyze the ROP of ε-CL efficiently. The fluorescent CDs@PCL hybrids were obviously hydrophobic and they exhibited an excellent biocompatibility, and biodegradability due to the existence of PCL...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629043/carbon-quantum-dots-from-carbonized-walnut-shells-structural-evolution-fluorescence-characteristics-and-intracellular-bioimaging
#15
Chaoge Cheng, Yanni Shi, Min Li, Malcolm Xing, Qilin Wu
Carbon quantum dots (CQDs) have attracted tremendous attention for their prominent fluorescence, excellent stability, and outstanding biocompatibility. Herein, we report a facile method to prepare CQDs from walnut shells, which mainly consist of natural cellulose. After carbonization of the walnut shells and acid treatments, zigzag and armchair edges of CQDs with an average size of 3.4nm were revealed by the high-resolution transmission electron microscopy. Consistent with the (100) planes of graphitic carbon, the lattice spacing distance of these CQDs was 0...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629019/methotrexate-loaded-nitrogen-doped-graphene-quantum-dots-nanocarriers-as-an-efficient-anticancer-drug-delivery-system
#16
Fatemeh Khodadadei, Shahrokh Safarian, Narges Ghanbari
Graphene quantum dots (GQDs) are new efficient nanomaterials used in therapeutic applications. In this study, blue fluorescent nitrogen-doped GQDs (N-GQDs) were synthesized by a hydrothermal method via pyrolisis of citric acid as the carbon source and urea as the nitrogen source. The existence of doped nitrogen in GQDs was confirmed by FTIR characterization. Here, for the first time, the N-GQDs were loaded with the anticancer drug, methotrexate (MTX), to prepare MTX-(N-GQDs) as an efficient drug delivery system...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628716/imprinted-photonic-hydrogels-for-the-size-and-shell-selective-recognition-of-nanoparticles
#17
Sarra Gam-Derouich, Céline Bourdillon, Soraya Lakhdar Chaouche, Laurent Coolen, Agnès Maître, Claire Mangeney, Catherine Schwob
Sensors based on responsive photonic hydrogels have recently attracted considerable attention for visual medical diagnostics, pharmaceutical bioassays and environmental monitoring. However, the use of these promising materials for the detection of nanoparticles (NPs) has never been explored so far, although the sensing of nano-objects is a rapidly-evolving new area of research. To address this issue, we have combined the concepts of inverse opal hydrogels and nanoparticle-imprinted polymers. By this way, we could obtain a NP-imprinted photonic hydrogel, consisting in a three-dimensional, highly-ordered poly(methacrylic acid) macroporous array, where nanocavities complementary to the target NPs, here colloidal quantum dots, are distributed...
June 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28628302/highly-fe3-selective-fluorescent-nanoprobe-based-on-ultra-bright-n-p-co-doped-carbon-dots-and-its-application-in-biological-samples
#18
Jingfang Shangguan, Jin Huang, Dinggeng He, Xiaoxiao He, Kemin Wang, Runzhi Ye, Xue Yang, Taiping Qing, Jinlu Tang
Measuring the levels of Fe3+ in human body has attracted considerable attention for health monitoring as it plays an essential element in many physiological processes. In this work, we reported a selective fluorescent nanoprobe for Fe3+ detection in biological samples based on ultra-bright N/P co-doped carbon dots. By employing adenosine 5'-triphosphate (ATP) as the carbon, nitrogen and phosphorus source, the N/P co-doped carbon dots could be simply prepared through hydrothermal treatment. The obtained carbon dots exhibited high quantum yields up to 43...
June 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28628015/latent-tuberculosis-potential-biomarkers-reactivation-of-infection
#19
I Pantsulaia, N Kikodze, T Chikovani
Tuberculosis continues to be one of the most important infectious causes of death worldwide. Despite substantial investments and progress made in expansion of directly observed therapy short course (DOTS) strategy, improved treatment completion rates and inadequate case detection remains a major obstacle for global control of Tuberculosis. The global case detection rate has increased from 28% to 60%. However, it is estimated that approximately 50% of patients with tuberculosis are still not diagnosed or treated appropriately...
May 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28627747/spontaneous-intercostal-artery-bleeding-in-a-hemodialysis-patient
#20
Areum Durey, Young Sam Kim, Ah Jin Kim
Spontaneous rupture of an intercostal artery (ICA) is a rare but could be a life-threatening emergency requiring prompt diagnosis and intervention for optimal outcome. We report a patient presented with swelling in his right-side back which started immediately after scheduled hemodialysis and continued to increase in size. Contrast computed tomography scan revealed soft tissue attenuated lesion with internal enhancing dots which suggested expanding hematoma with active bleeding. Arteriography detected focal contrast extravasation from seventh ICA, and transcatheter arterial embolization was successfully done...
June 19, 2017: Hemodialysis International
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