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https://www.readbyqxmd.com/read/29668123/nocardia-infections-in-the-transplanted-host
#1
M Hemmersbach-Miller, J E Stout, M H Woodworth, G M Cox, J L Saullo
BACKGROUND: Nocardia are uncommon pathogens that disproportionately afflict the immunocompromised host. Epidemiology and outcome data of Nocardia infections in transplant recipients are limited. METHODS: We performed a retrospective chart review of all patients at Duke University Hospital with a history of solid organ transplant (SOT) or hematopoietic cell transplant (HCT) and at least one positive culture for Nocardia between 1996-2013. Our aim was to describe the epidemiology and outcomes of Nocardia infections in the transplanted host...
April 18, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29668119/n-heterocyclic-carbene-analogues-of-thiele-and-chichibabin-hydrocarbons
#2
Dennis Rottschäfer, Nga Kim T Ho, Beate Neumann, Hans-Georg Stammler, Maurice van Gastel, Diego M Andrada, Rajendra S Ghadwal
Stable N-heterocyclic carbene analogues of Thiele and Chichibabin hydrocarbons, [(IPr)(C6 H4 )(IPr)] and [(IPr)(C6 H4 )2 (IPr)] (4 and 5, respectively; IPr=C{N(2,6-iPr2 C6 H3 )}2 CHCH), are reported. In a nickel-catalyzed double carbenylation of 1,4-Br2 C6 H4 and 4,4'-Br2 (C6 H4 )2 with IPr (1), [(IPr)(C6 H4 )(IPr)](Br)2 (2) and [(IPr)(C6 H4 )2 (IPr)](Br)2 (3) were generated, which respectively afforded 4 and 5 as crystalline solids upon reduction with KC8 . Experimental and computational studies support the semiquinoidal nature of 5 with a small singlet-triplet energy gap ΔES-T of 10...
April 18, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29667839/polyoxometalate-based-metal-organic-frameworks-as-visible-light-induced-photocatalysts
#3
Xiuxia Zhao, Shaowei Zhang, Junqing Yan, Landong Li, Guangjun Wu, Wei Shi, Guangming Yang, Naijia Guan, Peng Cheng
Two stable 3D polyoxometalate-based metal-organic frameworks (PMOFs), [CuI 12 (trz)8 (H2 O)2 ][α-SiW12 O40 ]·2H2 O (1) and [CuI 12 (trz)8 Cl][α-PW12 O40 ] (2) (Htrz = 1- H-1,2,4-triazole) based on Keggin-type POMs were successfully obtained and fully characterized. The basic building units of the two PMOFs are [CuI 12 (trz)8 ], but polyoxoanion (POA) template effect leads to different structures and properties: 1 represents an interesting example that [α-SiW12 O40 ]4- locate in the nine-membered Cu-trz rings through Cu···O weak interactions to form a 3D framework, whereas 2 shows a 3D structure constructed from 2D bilayer cationic network [CuI 12 (trz)8 Cl]3+ and [α-PW12 O40 ]3- lying in the adjacent layers via Cu···O weak interactions...
April 18, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29667819/synthesis-and-evolution-of-a-tna-aptamer-bearing-7-deaza-7-substituted-guanosine-residues
#4
Hui Mei, Jen-Yu Liao, Randi M Jimenez, Yajun Wang, Saikat Bala, Cailen McCloskey, Christopher Switzer, John C Chaput
In vitro selection experiments carried out on artificial genetic polymers require robust and faithful methods for copying genetic information back and forth between DNA and xeno-nucleic acids (XNA). Previously, we have shown that Kod-RI, an engineered polymerase developed to transcribe DNA templates into threose nucleic acid (TNA), can function with high fidelity in the absence of manganese ions. However, the transcriptional efficiency of this enzyme diminishes greatly when individual templates are replaced with libraries of DNA sequences, indicating that manganese ions are still required for in vitro selection...
April 18, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29667810/highly-stable-thin-film-transistors-based-on-indium-oxynitride-semiconductor
#5
Hyoung-Do Kim, Jong Heon Kim, Kyung Park, Yun Chang Park, Sunkook Kim, Yong Joo Kim, Jozeph Park, Hyun-Suk Kim
In this study, the properties of indium oxynitride (InON) semiconductor films grown by reactive radio frequency sputtering were examined both experimentally and theoretically. Also, thin film transistors (TFTs) incorporating InON as the active layer were evaluated for the first time. It is found that InON films exhibit high stability upon prolonged exposure to air, and the corresponding TFTs are more stable when subjected to negative bias illumination stress (NBIS), compared to devices based on indium oxide (In2O3) or zinc oxynitride (ZnON) semiconductors...
April 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29667724/relationship-between-c-reactive-protein-albumin-ratio-and-coronary-artery-disease-severity-in-patients-with-stable-angina-pectoris
#6
Yavuz Karabağ, Metin Çağdaş, Ibrahim Rencuzogullari, Süleyman Karakoyun, İnanç Artaç, Doğan İliş, Eray Atalay, Mahmut Yesin, Mustafa Ozan Gürsoy, Ibrahim Halil Tanboğa
BACKGROUND: Syntax score (SS), which is an angiographic tool used in grading the complexity of coronary artery disease (CAD), has prognostic importance in coronary artery disease (CAD) and provides important information regarding selection of revascularization strategy. C-reactive protein (CRP) and albumin are indicators of inflammation, and high levels of them are associated with high SS. We aimed to investigate whether baseline CRP to albumin ratio C-Reactive Protein/Albumin Ratio (CAR), an easily available and novel inflammatory marker, is associated with SS...
April 18, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29667687/molecular-gated-algan-gan-high-electron-mobility-transistor-for-ph-detection
#7
Xiangzhen Ding, Shuai Yang, Bin Miao, Le Gu, Zhiqi Gu, Jian Zhang, Baojun Wu, Hong Wang, Dongmin Wu, Jiadong Li
A molecular gated-AlGaN/GaN high electron mobility transistor has been developed for pH detection. The sensing surface of the sensor was modified with 3-aminopropyltriethoxysilane to provide amphoteric amine groups, which would play the role of receptors for pH detection. On modification with 3-aminopropyltriethoxysilane, the transistor exhibits good chemical stability in hydrochloric acid solution and is sensitive for pH detection. Thus, our molecular gated-AlGaN/GaN high electron mobility transistor acheived good electrical performances such as chemical stability (remained stable in hydrochloric acid solution), good sensitivity (37...
April 18, 2018: Analyst
https://www.readbyqxmd.com/read/29667510/air-quality-modeling-for-effective-environmental-management-in-the-mining-region
#8
Zunaira Asif, Zhi Chen, Yi Han
Air quality in the mining sector is a serious environmental concern and associated with many health issues. The air quality management in mining region has been facing many challenges due to lack of understanding of atmospheric factors and physical removal mechanism. A modeling approach called mining air dispersion model (MADM) is developed to predict air pollutants concentration in the mining region while considering the deposition effect. The model is taken into account through the planet's boundary conditions and assuming that the eddy diffusivity depends on the downwind distance...
April 18, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29667505/a-comprehensive-screening-shows-that-ergothioneine-is-the-most-abundant-antioxidant-in-the-wild-macrofungus-phylloporia-ribis-ryvarden
#9
Hengqiang Zhao, Minmin Zhang, Qian Liu, Xiaoli Wang, Ruixuan Zhao, Yanling Geng, Tityee Wong, Shengbo Li, Xiao Wang
The polar and non-polar extracts from the authenticated wild mushroom Phylloporia ribis were separated by hydrophilic interaction liquid chromatography (HILIC) and by reverse phase (RP)-HPLC, respectively. A split valve separated the eluents into two fractions for free-radical scavenging analysis and for structural identification. Forty-six compounds showed scavenging activity of the stable-free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH). The structures of 8 antioxidants (inosine, caffeic acid, ergothioneine, p-hydroxybenzoic acid, adenosine, 3,4-dihydroxybenzaldehyde, apigenin, and naringenin) are characterized by Mass Spectrometer...
April 3, 2018: Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews
https://www.readbyqxmd.com/read/29667472/evaluation-of-the-effect-of-pulsed-dye-laser-on-chronic-psoriatic-plaque
#10
Nagwa Mohammad Elwan, Shereen Farouk Gheida, Soha Abdalla Hawwam, Abeer Hussien Ahmed
Psoriasis is one of the most prevalent immune mediated skin diseases. Selective vascular destruction by pulsed dye laser is considered one of effective laser treatments. OBJECTIVE: Evaluation of the therapeutic effect of pulsed dye laser in treatment of chronic psoriatic plaque lesions and changes in human beta defensin-2 expression in the psoriatic patients before and after treatment, with correlation to the clinical improvement. METHODS: Twenty patients with psoriatic plaque on right side treated by laser and another plaque on left side similar in size and severity score as control receiving no treatment...
April 18, 2018: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/29667470/long-term-skeletal-effects-of-high-pull-headgear-followed-by-fixed-appliances-for-the-treatment-of-class-ii-malocclusions
#11
E Erin Bilbo, Steven D Marshall, Karin A Southard, Verrasathpurush Allareddy, Nathan Holton, Allyn M Thames, Marlene S Otsby, Thomas E Southard
OBJECTIVES: The long-term skeletal effects of Class II treatment in growing individuals using high-pull facebow headgear and fixed edgewise appliances have not been reported. The purpose of this study was to evaluate the long-term skeletal effects of treatment using high-pull headgear followed by fixed orthodontic appliances compared to an untreated control group. MATERIALS AND METHODS: Changes in anteroposterior and vertical cephalometric measurements of 42 Class II subjects (n = 21, mean age = 10...
April 18, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29667411/synthesis-and-electronic-properties-of-length-defined-9-10-anthrylene-butadiynylene-oligomers
#12
Maiko Nagaoka, Eiji Tsurumaki, Mai Nishiuchi, Tetsuo Iwanaga, Shinji Toyota
Linear π-conjugated oligomers consisting of anthracene and diacetylene units were readily synthesized by a one-pot process that involved desilylation and oxidative coupling from appropriate building units. We were able to isolate length-defined oligomers ranging from 2-mer to 6-mer as stable and soluble solids having characteristic colors. X-ray analysis and DFT calculations revealed that these oligomers had linear structures and coplanar conformations. The bathochromic shifts in the UV-vis spectra suggested that the π-conjugation was extended with elongation of the linear chain...
April 18, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29667407/the-enhanced-stability-of-pt-ml-m-ml-wc-0001-multilayer-alloys-under-electrochemical-conditions-a-first-principle-study
#13
Xiaoming Zhang, Tianwei Gu, Shaodong Shi, Leyi Li, Shansheng Yu
Pt monolayer catalyst could greatly reduce the use of platinum. However, the core or subsurface transition metal could easily segregate to the surface and eventually selectively dissolve in the working conditions. In this work, a type of PtML /MML /WC multi-layer structure catalyst has been designed using DFT method. The results show that the stability of W-terminated core catalysts is lower than that of the corresponding C-terminated one. More importantly, C-terminated PtML/CoML/WC alloy could also maintain a stable platinum monolayer structure in various electrolyte solutions (eg, perchloric acid, phosphoric acid, alkaline solutions) and via different ORR pathways, in addition to the previously well-known precious alloy elements, such as Ru, Ir, etc...
April 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29667403/rapid-detection-of-mercury-ions-based-on-nitrogen-doped-graphene-quantum-dots-accelerating-formation-of-manganese-porphyrin
#14
Dong Peng, Li Zhang, Ru-Ping Liang, Jian-Ding Qiu
Mercuric ion (HgII) is a stable form of mercury pollution with high toxicity and bioaccumulation ability, and the sensitive and visible determination is of great importance. Herein, a simple method to magically improve the complexation reaction rate between porphyrin and manganous ions (MnII) have been proposed by using the synergistic effect of trace nitrogen doped graphene quantum dots (NGQDs) and Hg(II). A mechanism is proposed in accordance with a substitution reaction in which the deformed porphyrin nucleus by relatively larger Hg(II) ions is favourable for attacking of small divalent metal ions carried by NGQDs from the back...
April 18, 2018: ACS Sensors
https://www.readbyqxmd.com/read/29667243/a-biopolymer-heparin-sodium-interlayer-anchoring-tio-2-and-mapbi-3-enhances-trap-passivation-and-device-stability-in-perovskite-solar-cells
#15
Shuai You, Hui Wang, Shiqing Bi, Jiyu Zhou, Liang Qin, Xiaohui Qiu, Zhiqiang Zhao, Yun Xu, Yuan Zhang, Xinghua Shi, Huiqiong Zhou, Zhiyong Tang
Traps in the photoactive layer or interface can critically influence photovoltaic device characteristics and stabilities. Here, traps passivation and retardation on device degradation for methylammonium lead trihalide (MAPbI3 ) perovskite solar cells enabled by a biopolymer heparin sodium (HS) interfacial layer is investigated. The incorporated HS boosts the power conversion efficiency from 17.2 to 20.1% with suppressed hysteresis and Shockley-Read-Hall recombination, which originates primarily from the passivation of traps near the interface between the perovskites and the TiO2 cathode...
April 18, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29667237/the-trends-and-prevalence-of-obesity-and-morbid-obesity-among-australian-school-aged-children-1985-2014
#16
Joshua Xu, Louise L Hardy, Cici Z Guo, Sarah P Garnett
AIM: Children with obesity have a greater risk of adverse social and physical health outcomes. We examined temporal changes in body mass index (BMI) z-scores and the prevalence obesity and morbid obesity in children from 1985 to 2014. METHODS: Secondary data analysis of BMI data for children aged 7-15 years from five cross-sectional Australian datasets. Changes in age- and gender-adjusted BMI (BMI z-scores) and nutritional status were categorised using the International Obesity Task Force cut-off points...
April 17, 2018: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/29667171/mental-health-service-utilization-before-and-after-receipt-of-a-service-connected-disability-award-for-ptsd-findings-from-a-national-sample
#17
Rebecca K Sripada, Claire M Hannemann, Paula P Schnurr, Brian P Marx, Stacey J Pollack, John F McCarthy
OBJECTIVE: To determine patterns of mental health service use before and after VA disability compensation awards for posttraumatic stress disorder (PTSD). DATA SOURCES: A 10 percent random sample of VHA-enrolled Veterans with new or increased PTSD service connection between 2012 and 2014 (n = 22,249). STUDY DESIGN: We used latent trajectory analysis to identify utilization patterns and multinomial logistic regression to assess associations between Veteran characteristics and trajectory membership...
April 17, 2018: Health Services Research
https://www.readbyqxmd.com/read/29667154/reliability-and-feasibility-of-gait-initiation-centre-of-pressure-excursions-using-a-wii-%C3%A2-balance-board-in-older-adults-at-risk-of-failing
#18
James Lee, Graham Webb, Adam P Shortland, Rebecca Edwards, Charlotte Wilce, Gareth D Jones
BACKGROUND: Impairments in dynamic balance have a detrimental effect in older adults at risk of falls (OARF). Gait initiation (GI) is a challenging transitional movement. Centre of pressure (COP) excursions using force plates have been used to measure GI performance. The Nintendo Wii Balance Board (WBB) offers an alternative to a standard force plate for the measurement of CoP excursion. AIMS: To determine the reliability of COP excursions using the WBB, and its feasibility within a 4-week strength and balance intervention (SBI) treating OARF...
April 17, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29667134/two-phase-i-pharmacokinetic-and-pharmacodynamic-studies-of-dfp-10917-a-novel-nucleoside-analog-with-14-day-and-7-day-continuous-infusion-schedules
#19
Kamalesh Sankhala, Chris H Takimoto, Alain C Mita, Henry Xiong, Jordi Rodón, Amir Mehrvarz Sarshekeh, K Burns, Kenzo Iizuka, Scott Kopetz
Purpose DFP-10917 is a novel deoxycytidine analog with a unique mechanism of action. Brief exposure to high concentrations of DFP-10917 inhibits DNA polymerase resulting in S-phase arrest, while prolonged exposure to DFP-10917 at low concentration causes DNA fragmentation, G2/M-phase arrest, and apoptosis. DFP-10917 demonstrated activity in tumor xenografts resistant to other deoxycytidine analogs. Experimental design Two phase I studies assessed the safety, pharmacokinetic, pharmacodynamic and preliminary efficacy of DFP-10917...
April 18, 2018: Investigational New Drugs
https://www.readbyqxmd.com/read/29667057/characterization-of-a-di-n-butyl-phthalate-degrading-bacterial-consortium-and-its-application-in-contaminated-soil
#20
Jing Yang, Chuling Guo, Shasha Liu, Weiting Liu, Han Wang, Zhi Dang, Guining Lu
Dibutyl phthalate (DBP), as a plasticizer, is widely used in China, and it is easily released into diverse environments. In this study, we have obtained a stable bacterial consortium (B1) enriched from municipal sewage treatment plant activated sludge. The obtained bacterial consortium B1 was capable of degrading DBP and was mainly composed of Pandoraea sp. and Microbacterium sp. From the initial concentrations of 35-500 mg L-1 , DBP was efficiently degraded by the consortium, with the degradation rates above 92% within 3 days...
April 17, 2018: Environmental Science and Pollution Research International
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