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https://www.readbyqxmd.com/read/28107782/ultra-low-parasitic-energy-for-post-combustion-co2-capture-realized-in-a-nickel-isonicotinate-mof-with-excellent-moisture-stability
#1
Shyamapada Nandi, Sean P Collins, Debanjan Chakraborty, Debasis Banerjee, Praveen K Thallapally, Tom K Woo, Ramanathan Vaidhyanathan
MOFs have attracted significant attention as solid sorbents in gas separation processes for low-energy post-combustion CO2 capture. The parasitic energy (PE) has been put forward as a holistic parameter that measures how energy efficient (and therefore cost-effective) the CO2 capture process will be using the material. In this work, we present a nickel isonicotinate based ultra-microporous MOF, 1 [Ni-(4PyC)2⦁DMF], that has the lowest PE for post-combustion CO2 capture reported to date. We calculate a PE of 655 kJ/kg CO2, which is lower than that of the best performing material previously reported, Mg-MOF-74...
January 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28106198/ten-gram-scale-sic-sio2-nanowires-high-yield-synthesis-towards-industrialization-in-situ-growth-mechanism-and-their-peculiar-photoluminescence-and-electromagnetic-wave-absorption-properties
#2
Z J Li, H Y Yu, G Y Song, J Zhao, H Zhang, M Zhang, A L Meng, Q D Li
SiC@SiO2 nanowires, as a functional nanocomposite, have attracted widespread attention due to their fascinating performance and broad application prospect. However, the low-cost, high yield preparation of large-scale SiC@SiO2 nanowires is still a bottleneck, which hinders their industrial application. Herein, a carbothermal reduction strategy has been developed to synthesize SiC@SiO2 nanowires, which breaks through the handicap of the traditional growth pattern that uses the aid of a substrate. Systematic characterization results illustrate that the yield of the as-obtained products greatly depends on the heating rate, and ten-gram scale SiC@SiO2 nanowires (∼27...
January 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28059713/time-resolved-x-ray-absorption-spectroscopy-with-a-water-window-high-harmonic-source
#3
Yoann Pertot, Cédric Schmidt, Mary Matthews, Adrien Chauvet, Martin Huppert, Vit Svoboda, Aaron von Conta, Andres Tehlar, Denitsa Baykusheva, Jean-Pierre Wolf, Hans Jakob Wörner
Time-resolved X-ray absorption spectroscopy (TR-XAS) has so far practically been limited to large-scale facilities, to sub-picosecond temporal resolution and to the condensed phase. Here, we report the realization of TR-XAS with a temporal resolution in the low femtosecond range by developing a table-top high-harmonic source reaching up to 350 eV, thus partially covering the spectral region of 280 to 530 eV, where water is transmissive. We use this source to follow previously unexamined light-induced chemical reactions in the lowest electronic states of isolated CF4(+) and SF6(+) molecules in the gas phase...
January 5, 2017: Science
https://www.readbyqxmd.com/read/28059234/multiexposure-imaging-and-parameter-optimization-for-intensified-star-trackers
#4
Wenbo Yu, Jie Jiang, Guangjun Zhang
Due to the introduction of the intensified image detector, the dynamic performance of the intensified star tracker is effectively improved. However, its attitude update rate is still seriously restricted by the transmission and processing of pixel data. In order to break through the above limitation, a multiexposure imaging approach for intensified star trackers is proposed in this paper. One star image formed by this approach actually records N different groups of star positions, and then N corresponding groups of attitude information can be acquired...
December 20, 2016: Applied Optics
https://www.readbyqxmd.com/read/28005335/tumor-specific-multiple-stimuli-activated-dendrimeric-nanoassemblies-with-metabolic-blockade-surmount-chemotherapy-resistance
#5
Yachao Li, Xianghui Xu, Xiao Zhang, Yunkun Li, Zhijun Zhang, Zhongwei Gu
Chemotherapy resistance remains a serious impediment to successful antitumor therapy around the world. However, existing chemotherapeutic approaches are difficult to cope with the notorious multidrug resistance in clinical treatment. Herein, we developed tumor-specific multiple stimuli-activated dendrimeric nanoassemblies with a metabolic blockade to completely combat both physiological barriers and cellular factors of multidrug resistance. With a sophisticated molecular and supramolecular engineering, this type of tumor-specific multiple stimuli-activated nanoassembly based on dendrimeric prodrugs can hierarchically break through the sequential physiological barriers of drug resistance, including stealthy dendritic PEGylated corona to optimize blood transportation, robust nanostructures for efficient tumor passive targeting and accumulation, enzyme-activated tumor microenvironment targeted to deepen tumor penetration and facilitate cellular uptake, cytoplasmic redox-sensitive disintegration for sufficient release of encapsulated agents, and lysosome acid-triggered nucleus delivery of antitumor drugs...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28003078/ligand-trap-for-the-activin-type-iia-receptor-the-long-sought-drug-to-overcome-the-calcification-paradox-in-ckd
#6
Anja Verhulst, Pieter Evenepoel, Patrick C D'Haese
The chronic kidney disease-mineral and bone disorder syndrome illustrates the association between a disturbed physiological bone turnover/mineralization and pathologic vascular mineralization; the so-called calcification paradox. This implies that treatments aimed at curing bone disorders might have serious implications for cardiovascular health and vice versa. Hence, there is an urgent need for treatments that are able to break through this cross-talk. Hereto, compounds such as those interfering with activin type IIA receptor signaling and acting upstream of the Wnt-β-catenin pathway are of particular interest...
January 2017: Kidney International
https://www.readbyqxmd.com/read/27999939/heat-survival-and-phenotype-microarray-profiling-of-salmonella-typhimurium-mutants
#7
Turki M Dawoud, Anita Khatiwara, Si Hong Park, Morgan L Davis, Christopher A Baker, Steven C Ricke, Young Min Kwon
Contamination of food products by pathogenic microorganisms continues to be a major public health and food industry concern. Non-typhoidal Salmonella species have led to numerous outbreaks associated with various foods. A wide variety of methods have been applied and introduced for treatment of fresh foods to eliminate pathogenic as well as spoilage microorganisms. Salmonella can become exposed to elevated temperatures while associated with hosts such as poultry. In addition, heat treatment is also applied at various stages of processing to retain the shelf life of food products...
February 2017: Current Microbiology
https://www.readbyqxmd.com/read/27943678/cytotoxicity-of-tirapazamine-3-amino-1-2-4-benzotriazine-1-4-dioxide-induced-dna-damage-in-chicken-dt40-cells
#8
Takahito Moriwaki, Saki Okamoto, Hiroyuki Sasanuma, Hideko Nagasawa, Shunichi Takeda, Shin-Ichiro Masunaga, Keizo Tano
Tirapazamine (TPZ) is an anticancer drug with highly selective cytotoxicity toward hypoxic cells. TPZ is converted to a radical intermediate under hypoxic conditions, and this intermediate interacts with intracellular macromolecules, including DNA. TPZ has been reported to indirectly induce DNA double-strand breaks (DSBs) through the formation of various intermediate DNA lesions under hypoxic conditions. Although the topoisomerase II-DNA complex has been identified as one of these intermediates, other lesions have not yet been defined...
December 27, 2016: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/27920935/cerebral-foreign-body-granuloma-in-brain-triggering-generalized-seizures-without-obvious-craniocerebral-injury-a-case-report-and-review-of-the-literature
#9
Nina Brawanski, Peter Baumgarten, Jürgen Konczalla, Volker Seifert, Christian Senft
BACKGROUND: Intracerebral foreign body granuloma is rarely reported. We present the case of a male patient with a cerebral foreign body granuloma. CASE DESCRIPTION: Initial admission of a 67-year-old male patient was after an aphasia followed by secondary generalized seizures. Cranial computed tomography (CCT) showed a metal-dense, wedge-shaped foreign body in the range of the frontal sinus on the left side, breaking through the frontal sinus, and creating a connection to the frontal cerebral lobe...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27908849/physician-heal-thyself-luke-4-23
#10
EDITORIAL
Jamie Hacker Hughes, Amra Saleem Rao, Neelam Dosanjh, Esther Cohen-Tovée, Jeremy Clarke, Gita Bhutani
The performance culture of the health service means that the psychological well-being of staff is becoming paramount in maintaining the workforce and in sustaining psychological health and morale. A Charter for Psychological Staff Wellbeing and Resilience is introduced that puts the onus on us and on employers to make the necessary adjustments to their workplace cultures and encourage professionals - us - to break through the barrier of stigma.
December 2016: British Journal of Psychiatry: the Journal of Mental Science
https://www.readbyqxmd.com/read/27906036/complicated-acute-appendicitis-presenting-as-a-rapidly-progressive-soft-tissue-infection-of-the-abdominal-wall-a-case-report
#11
Corinne Beerle, Hans Gelpke, Stefan Breitenstein, Ralph F Staerkle
BACKGROUND: We report a case of a rare complication of acute appendicitis with perforation through the abdominal wall. The case points out that an intraabdominal origin should be considered in patients presenting with rapidly spreading soft tissue infections of the trunk. CASE PRESENTATION: A 58-year-old European woman presented to our hospital with a 1-week history of severe abdominal pain accompanied by rapidly spreading erythema and emphysema of the lower abdomen...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27902905/pathogenicity-of-genome-reassortant-infectious-bursal-disease-viruses-in-chickens-and-turkeys
#12
Daral J Jackwood, Simone T Stoute, Beate M Crossley
Infectious bursal disease virus (IBDV) contains two genome segments (segment A/segment B) that can reassort among the viruses. Reassortant IBDVs have been identified in several countries including the United States. These reassortant viruses usually include at least one genome segment from a very virulent (vv)IBDV strain. In vivo virulence of six reassortant IBDV from the United States was assessed relative to the virulence of three frequently described IBDV pathotypes: vvIBDV (rB strain), classic virulent (cv)IBDV (STC strain), and subclinical (sc)IBDV (Del-E strain)...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27836173/distinguishable-co-transport-mechanisms-of-phenanthrene-and-oxytetracycline-with-oxidized-multiwalled-carbon-nanotubes-through-saturated-soil-and-sediment-columns-vehicle-and-competition-effects
#13
Jing Fang, Minhao Wang, Bing Shen, Luqing Zhang, Daohui Lin
To date mechanisms underlying co-transports of engineered nanomaterials (ENMs) with contaminants have not been adequately explored, which involve complex interactions among ENMs, contaminants, and soils. This study investigated co-transport behaviors of 3 oxidized-multiwalled carbon nanotubes (o-MWCNTs) with phenanthrene (PHE) and oxytetracycline (OTC) in soil and sediment columns. Sorptions and desorptions of PHE and OTC by the o-MWCNTs were examined to facilitate the discussion of co-transport mechanisms...
January 1, 2017: Water Research
https://www.readbyqxmd.com/read/27813026/research-on-design-of-tri-color-shift-device
#14
Ping Xu, Xia Yuan, Haixuan Huang, Tuo Yang, Yanyan Huang, Tengfei Zhu, Shaotuo Tang, Wenda Peng
An azimuth-tuned tri-color shift device based on an embedded subwavelength one-dimensional rectangular structure with single period is proposed. High reflection efficiencies for both TE and TM polarizations can be achieved simultaneously. Under an oblique incidence of 60°, the reflection efficiencies can reach up to 85, 86, and 100 % in blue (azimuth of 24°), green (azimuth of 63°), and red (azimuth of 90°) waveband, respectively. Furthermore, the laws of influence of device period, groove depth, coating thickness, and incident angle on reflection characteristics are investigated and exposed, and feasibility of the device is demonstrated...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27803629/skills-associated-with-line-breaks-in-elite-rugby-union
#15
Steve den Hollander, James Brown, Michael Lambert, Paul Treu, Sharief Hendricks
The ability of the attacking team to break through the defensive line is a key indicator of success as it creates opportunities to score tries. The aim of this study was to analyse line breaks and identify the associated skills and playing characteristics. The 2013 Super Rugby season (125 games) was analysed, in which 362 line breaks were identified and coded using variables that assessed team patterns and non-contact attacking skills in the phases preceding the line break. There was an average of 3 line breaks per game, with 39% of line breaks resulting in a try...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27802642/breaking-through-the-false-coincidence-barrier-in-electron-ion-coincidence-experiments
#16
David L Osborn, Carl C Hayden, Patrick Hemberger, Andras Bodi, Krisztina Voronova, Bálint Sztáray
Photoelectron Photoion Coincidence (PEPICO) spectroscopy holds the promise of a universal, isomer-selective, and sensitive analytical technique for time-resolved quantitative analysis of bimolecular chemical reactions. Unfortunately, its low dynamic range of ∼10(3) has largely precluded its use for this purpose, where a dynamic range of at least 10(5) is generally required. This limitation is due to the false coincidence background common to all coincidence experiments, especially at high count rates. Electron/ion pairs emanating from separate ionization events but arriving within the ion time of flight (TOF) range of interest constitute the false coincidence background...
October 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27797725/morphology-and-distribution-of-taste-papillae-and-oral-denticles-in-the-developing-oropharyngeal-cavity-of-the-bamboo-shark-chiloscyllium-punctatum
#17
Carla J L Atkinson, Kyle J Martin, Gareth J Fraser, Shaun P Collin
Gustation in sharks is not well understood, especially within species that ingest food items using suction. This study examines the morphological and immunohistochemical characterisation of taste papillae and oral denticles in the oropharynx of the brown-banded bamboo shark Chiloscyllium punctatum and compares their distribution during development. Taste papillae of C. punctatum are located throughout the oropharyngeal region and are most concentrated on the oral valves (2125-3483 per cm(2) in embryos; 89-111 per cm(2) in mature adults) close to the tooth territories...
December 15, 2016: Biology Open
https://www.readbyqxmd.com/read/27775657/a-fiber-bragg-grating-based-monitoring-system-for-roof-safety-control-in-underground-coal-mining
#18
Yiming Zhao, Nong Zhang, Guangyao Si
Monitoring of roof activity is a primary measure adopted in the prevention of roof collapse accidents and functions to optimize and support the design of roadways in underground coalmines. However, traditional monitoring measures, such as using mechanical extensometers or electronic gauges, either require arduous underground labor or cannot function properly in the harsh underground environment. Therefore, in this paper, in order to break through this technological barrier, a novel monitoring system for roof safety control in underground coal mining, using fiber Bragg grating (FBG) material as a perceived element and transmission medium, has been developed...
October 21, 2016: Sensors
https://www.readbyqxmd.com/read/27765940/epigenetic-drug-discovery-breaking-through-the-immune-barrier
#19
David F Tough, Paul P Tak, Alexander Tarakhovsky, Rab K Prinjha
Immune-mediated diseases are clinically heterogeneous but they share genetic and pathogenic mechanisms. These diseases may develop from the interplay of genetic factors and environmental or lifestyle factors. Exposure to such factors, including infectious agents, is associated with coordinated changes in gene transcription owing to epigenetic alterations. A growing understanding of how epigenetic mechanisms control gene expression patterns and cell function has been aided by the development of small-molecule inhibitors that target these processes...
December 2016: Nature Reviews. Drug Discovery
https://www.readbyqxmd.com/read/27754878/a-model-of-differential-growth-guided-apical-hook-formation-in-plants
#20
Petra Žádníková, Krzysztof Wabnik, Anas Abuzeineh, Marçal Gallemi, Dominique Van Der Straeten, Richard S Smith, Dirk Inzé, Jiří Friml, Przemysław Prusinkiewicz, Eva Benková
Differential cell growth enables flexible organ bending in the presence of environmental signals such as light or gravity. A prominent example of the developmental processes based on differential cell growth is the formation of the apical hook that protects the fragile shoot apical meristem when it breaks through the soil during germination. Here, we combined in silico and in vivo approaches to identify a minimal mechanism producing auxin gradient-guided differential growth during the establishment of the apical hook in the model plant Arabidopsis thaliana Computer simulation models based on experimental data demonstrate that asymmetric expression of the PIN-FORMED auxin efflux carrier at the concave (inner) versus convex (outer) side of the hook suffices to establish an auxin maximum in the epidermis at the concave side of the apical hook...
October 2016: Plant Cell
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