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https://www.readbyqxmd.com/read/28540551/zif-8-derived-nitrogen-doped-porous-carbon-as-metal-free-catalyst-of-peroxymonosulfate-activation
#1
Wenjie Ma, Yunchen Du, Na Wang, Peng Miao
Nitrogen-doped porous carbon (NPC) is synthesized through a direct pyrolysis of zeolitic imidazolate framework (ZIF)-8 under N2 flow followed by acid washing process. It is found that NPC-800 pyrolyzed at 800 °C can inherit the perfect rhombic dodecahedron morphology of ZIF-8 crystals and achieve the considerable nitrogen-doping content of 15.20%. When NPC-800 is applied as the heterogeneous catalyst in peroxymonosulfate (PMS) activation for the degradation of Rhodamine B (RhB) and phenol, NPC-800 will exhibit its better performance than some conventional transition metal-based oxides and common carbon materials...
May 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28535603/realizing-full-coverage-of-stable-perovskite-film-by-modified-anti-solvent-process
#2
Long Ji, Ting Zhang, Yafei Wang, Peng Zhang, Detao Liu, Zhi Chen, Shibin Li
Lead-free solution-processed solid-state photovoltaic devices based on formamidinium tin triiodide (FASnI3) and cesium tin triiodide (CsSnI3) perovskite semiconductor as the light harvester are reported. In this letter, we used solvent engineering and anti-solvent dripping method to fabricate perovskite films. SnCl2 was used as an inhibitor of Sn(4+) in FASnI3 precursor solution. We obtained the best films under the function of toluene or chlorobenzene in anti-solvent dripping method and monitored the oxidation of FASnI3 films in air...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28532662/molecular-design-of-flotation-collectors-a-recent-progress
#3
REVIEW
Guangyi Liu, Xianglin Yang, Hong Zhong
The nature of froth flotation is to selectively hydrophobize valuable minerals by collector adsorption so that the hydrophobized mineral particles can attach air bubbles. In recent years, the increasing commercial production of refractory complex ores has been urgent to develop special collectors for enhancing flotation separation efficiency of valuable minerals from these ores. Molecular design methods offer an effective way for understanding the structure-property relationship of flotation collectors and developing new ones...
May 10, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28530278/synthesis-and-fast-transfer-of-monolayer-mos2-on-reusable-fused-silica
#4
Tao Liang, Shuang Xie, Weifei Fu, Yu Cai, Chinnathambi Shanmugavel, Hideo Iwai, Daisuke Fujita, Nobutaka Hanagata, Hongzheng Chen, Mingsheng Xu
Atomically thin, two-dimensional materials ranging from superconductors, metals, semiconductors to insulators are emerging as potential candidates for the next-generation digital electronics and optoelectronic applications. Their synthesis on a commonly used substrate and fast transfer to a plenty of desired substrates need to be addressed to meet the industrialization criteria for practical applications. In this study, fused silica, which is amorphous, transparent, and inexpensive, was examined as a substrate for MoS2 synthesis...
May 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28529496/treatment-of-the-mal-de-debarquement-syndrome-a-1-year-follow-up
#5
Mingjia Dai, Bernard Cohen, Catherine Cho, Susan Shin, Sergei B Yakushin
The mal de debarquement syndrome (MdDS) is a movement disorder, occurring predominantly in women, is most often induced by passive transport on water or in the air (classic MdDS), or can occur spontaneously. MdDS likely originates in the vestibular system and is unfamiliar to many physicians. The first successful treatment was devised by Dai et al. (1), and over 330 MdDS patients have now been treated. Here, we report the outcomes of 141 patients (122 females and 19 males) treated 1 year or more ago. We examine the patient's rocking frequency, body drifting, and nystagmus...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28525870/effective-swine-wastewater-treatment-by-combining-microbial-fuel-cells-with-flocculation
#6
Weijun Ding, Shaoan Cheng, Liliang Yu, Haobin Huang
Microbial fuel cells (MFCs) provide a cost-effective method for treating swine wastewater treatment and simultaneously producing electricity, yet they need to be combined with other wastewater treatment processes to improve the effluent water quality. In this paper, we constructed single-chamber air-cathode MFCs with a compact configuration for nitrogen and COD removal and high electricity production and combined them with a low-cost flocculation process to discharge higher quality wastewater. We show that MFCs could remove ammonia at a rate of 269...
May 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28524272/frontal-sinus-development-and-juvenile-age-estimation
#7
Kaitlin Moore, Ann Ross
Assessment of development is an important component of age estimation in juveniles. One area that has not been fully investigated as a possible aging method is the development of the frontal sinus. The frontal sinuses form when the ectocranial table of the frontal bone separates from the endocranial table forming an air pocket in the bone. The endocranial table ceases growth with the brain, while the ectocranial table is displaced anteriorly as the facial bones continue growth. In order to examine growth and the utility of the frontal sinuses for age estimation, 392 radiographs were examined (♀=159 and ♂=233) from the Juvenile Radiograph Database at North Carolina State University and the Patricia Database from Mercyhurst University...
May 19, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28505718/mechanics-of-a-granular-skin
#8
Somnath Karmakar, Anit Sane, S Bhattacharya, Shankar Ghosh
Magic sand, a hydrophobic toy granular material, is widely used in popular science instructions because of its nonintuitive mechanical properties. A detailed study of the failure of an underwater column of magic sand shows that these properties can be traced to a single phenomenon: the system self-generates a cohesive skin that encapsulates the material inside. The skin, consisting of pinned air-water-grain interfaces, shows multiscale mechanical properties: they range from contact-line dynamics in the intragrain roughness scale, to plastic flow at the grain scale, all the way to sample-scale mechanical responses...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28499157/identify-temporal-trend-of-air-temperature-and-its-impact-on-forest-stream-flow-in-lower-mississippi-river-alluvial-valley-using-wavelet-analysis
#9
Ying Ouyang, Prem B Parajuli, Yide Li, Theodor D Leininger, Gary Feng
Characterization of stream flow is essential to water resource management, water supply planning, environmental protection, and ecological restoration; while air temperature variation due to climate change can exacerbate stream flow and add instability to the flow. In this study, the wavelet analysis technique was employed to identify temporal trend of air temperature and its impact upon forest stream flows in Lower Mississippi River Alluvial Valley (LMRAV). Four surface water monitoring stations, which locate near the headwater areas with very few land use disturbances and the long-term data records (60-90 years) in the LMRAV, were selected to obtain stream discharge and air temperature data...
May 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28497615/quantification-of-rat-supraglottic-laryngeal-sensation-threshold
#10
Derrick C Gale, Neel K Bhatt, Randal C Paniello
OBJECTIVE: Laryngeal adductor response (LAR) to air puff is used as a reliable method in evaluating sensation thresholds (ST) in human laryngeal sensory disorders. This method has been difficult to perform in small subjects such as rodents. The aims of this study were to 1) evaluate ST to air puff under binocular microlaryngoscopy in rats to evaluate laryngeal sensory disorders, 2) determine sensory thresholds at varying target locations, and 3) determine the ideal depth of anesthesia...
May 11, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28497171/measuring-facial-cooling-in-outdoor-windy-winter-conditions-an-exploratory-study
#11
Andrew G S Briggs, Terry J Gillespie, Robert D Brown
Winter clothing provides insulation for almost all of a person's body, but in most situations, a person's face remains uncovered even in cold windy weather. This exploratory study used thermal imagery to record the rate of cooling of the faces of volunteers in a range of winter air temperatures and wind speeds. Different areas of the faces cooled at different rates with the areas around the eyes and neck cooling at the slowest rate, and the nose and cheeks cooling at the fastest rate. In all cases, the faces cooled at an approximately logarithmic decay for the first few minutes...
May 11, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28493193/the-first-survey-of-airborne-trace-elements-at-airport-using-moss-bag-technique
#12
Gordana Vuković, Mira Aničić Urošević, Sandra Škrivanj, Konstantin Vergel, Milica Tomašević, Aleksandar Popović
Air traffic represents an important way of social mobility in the world, and many ongoing discussions are related to the impacts that air transportation has on local air quality. In this study, moss Sphagnum girgensohnii was used for the first time in the assessment of trace element content at the international airport. The moss bags were exposed during the summer of 2013 at four sampling sites at the airport 'Nikola Tesla' (Belgrade, Serbia): runway (two), auxiliary runway and parking lot. According to the relative accumulation factor (RAF) and the limit of quantification of the moss bag technique (LOQT), the most abundant elements in the samples were Zn, Na, Cr, V, Cu and Fe...
May 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28486565/new-evaluation-index-for-the-retainability-of-a-swimmer-s-horizontal-posture
#13
Yasunori Watanabe, Kohji Wakayoshi, Teruo Nomura
This study aims to investigate the effect of changes in buoyancy when a swimmer respires in a horizontal posture. We attempted to evaluate the levelness of swimmers' streamline posture by simultaneously measuring the lung capacity and buoyancy under water. The buoyancy was measured based on the changes in the vertical loads of the upper and lower limbs on the subjects' streamline posture under water. The horizontal x-axis as lung ventilation and the vertical y-axis as buoyancy forms a linear equation y = ax + b...
2017: PloS One
https://www.readbyqxmd.com/read/28485435/perturbation-of-the-pulmonary-surfactant-monolayer-by-single-walled-carbon-nanotubes-a-molecular-dynamics-study
#14
Yan Xu, Zhen Luo, Shixin Li, Weiguo Li, Xianren Zhang, Yi Y Zuo, Fang Huang, Tongtao Yue
Single-walled carbon nanotubes (SWCNTs) are at present synthesized on a large scale with a variety of applications. The increasing likelihood of exposure to SWCNTs, however, puts human health at a high risk. As the front line of the innate host defense system, the pulmonary surfactant monolayer (PSM) at the air-water interface of the lungs interacts with the inhaled SWCNTs, which in turn inevitably perturb the ultrastructure of the PSM and affect its biophysical functions. Here, using molecular dynamics simulations, we demonstrate how the diameter and length of SWCNTs critically regulate their interactions with the PSM...
May 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28481175/dosimetric-evaluation-of-a-flexible-dual-balloon-constructed-applicator-in-treating-anorectal-cancer
#15
Hsiang-Chi Kuo, Keyur J Mehta, Ravindra Yaparpalvi, Alan Lee, Dinesh Mynampati, William Bodner, Madhur Garg, David Huang, Wolfgang A Tomé, Shalom Kalnicki
BACKGROUND AND PURPOSE: To assess the dosimetric flexibility of a dual balloon brachytherapy applicator developed for the treatment of anorectal lesions. MATERIALS AND METHODS: Different amounts of water were infused into the inner and outer balloon separately to study the asymmetrical distribution of the catheter, the radial distance of the active source channel to the inner surface of the global target volume , the space between the active source channels, and their dosimetric impact to target tissues and uninvolved rectum...
January 1, 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/28480127/towards-providing-solutions-to-the-air-quality-crisis-in-the-mexico-city-metropolitan-area-carbon-sequestration-by-succulent-species-in-green-roofs
#16
Margarita Collazo-Ortega, Ulises Rosas, Jerónimo Reyes-Santiago
INTRODUCTION: In the first months of 2016, the Mexico City Metropolitan Area experienced the worst air pollution crisis in the last decade, prompting drastic short-term solutions by the Mexico City Government and neighboring States. In order to help further the search for long-term sustainable solutions, we felt obliged to immediately release the results of our research regarding the monitoring of carbon sequestration by green roofs. Large-scale naturation, such as the implementation of green roofs, provides a way to partially mitigate the increased carbon dioxide output in urban areas...
March 31, 2017: PLoS Currents
https://www.readbyqxmd.com/read/28478709/elimination-of-ethanethiol-released-from-municipal-wastes-by-absorption-sequencing-electrochemical-oxidation
#17
Xiao Gong, Xu Yang, Haoyue Zheng, Zucheng Wu
As a typical municipal waste landfill gas, ethanethiol can become an air pollutant because of its low odor threshold concentration and toxicity to human beings. A hybrid process of absorption combined with electrochemical oxidation to degrade ethanethiol was investigated. The ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) was employed as an absorbent to capture ethanethiol from the air stream. Electrochemical oxidation demonstrated that ethanethiol could be oxidized on a β-PbO2 anode modified with fluoride, while [BMIM]BF4 was used as an electrolyte...
May 7, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28478672/colloidal-particles-at-a-range-of-fluid-fluid-interfaces
#18
Bernard P Binks
The study of solid particles residing at fluid-fluid interfaces has become an established area in surface and colloid science recently, experiencing a renaissance since around 2000. Particles at interfaces arise in many industrial products and processes such as antifoam formulations, crude oil emulsions, aerated foodstuffs, and flotation. Although they act in many ways like traditional surfactant molecules, they offer distinct advantages also, and the area is now multidisciplinary, involving research in the fundamental science and potential applications...
May 6, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28469821/evaluation-of-the-effect-of-three-innovative-recyling-methods-on-the-shear-bond-strength-of-stainless-steel-brackets-an-in-vitro-study
#19
Neeraj Gupta, Dilip Kumar, Aparna Palla
BACKGROUND: Orthodontists are commonly faced with the decision of what to do with debonded or inaccurately positioned brackets. An economical option to this dilemma is to recycle the brackets. Many recycling methods have been proposed, but the optimal bond strength of these recycled brackets needs further evaluation. Objectives: To evaluate and compare the effect of three recycling methods: (i) Sandblasting (ii) Sandblasting / direct flaming (iii) Sandblasting /direct flaming /acid bath solution on shear bond strength (SBS) of stainless steel brackets...
April 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28469816/reparability-of-giomer-using-different-mechanical-surface-treatments
#20
Saba Arami, Soodabeh Kimyai, Parnian-Alizadeh Oskoee, Mehdi Daneshpooy, Sahand Rikhtegaran, Mahmoud Bahari, Mehdi-Abed Kahnamoii
BACKGROUND: In the repair process achieving high bond strength between the new and old resin based materials is necessary for clinical longevity. This study compared the effect of three different mechanical surface treatments (air abrasion, Nd:YAG laser and diamond bur) on the repair bond strength of giomer. MATERIAL AND METHODS: In this in vitrostudy, 125 cylindrical giomer samples were used. The giomer samples were randomly assigned to 5 groups (n=25). In group 1, the samples did not undergo any surface treatment...
April 2017: Journal of Clinical and Experimental Dentistry
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