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https://www.readbyqxmd.com/read/28651190/temporal-dynamics-of-the-compositions-and-activities-of-soil-microbial-communities-post-application-of-the-insecticide-chlorantraniliprole-in-paddy-soils
#1
Meng Wu, Jia Liu, Weitao Li, Ming Liu, Chunyu Jiang, Zhongpei Li
Chlorantraniliprole (CAP) is a newly developed insecticide widely used in rice fields in China. There has been few studies evaluating the toxicological effects of CAP on soil-associated microbes. An 85-day microcosm experiment was performed to reveal the dissipation dynamics of CAP in three types of paddy soils in subtropical China. The effects of CAP on microbial activities (microbial biomass carbon-MBC, basal soil respiration-BSR, microbial metabolic quotient-qCO2, acid phosphatase and sucrose invertase activities) in the soils were periodically evaluated...
June 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28650257/sequential-phosphorylation-of-cst-subunits-by-different-cyclin-cdk1-complexes-orchestrate-telomere-replication
#2
Veena Gopalakrishnan, Cherylin Ruiling Tan, Shang Li
Telomeres are nucleoprotein structures that cap the ends of linear chromosomes. Telomere homeostasis is central to maintaining genomic integrity. In budding yeast, Cdk1 phosphorylates the telomere-specific binding protein, Cdc13, promoting the recruitment of telomerase to telomere and thereby telomere elongation. Cdc13 is also an integral part of the CST (Cdc13-Stn1-Ten1) complex that is essential for telomere capping and counteracting telomerase-dependent telomere elongation. Therefore, telomere length homeostasis is a balance between telomerase-extendable and CST-unextendable states...
June 26, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28650146/using-predefined-m3-%C3%A2%C2%B53-o-clusters-as-building-blocks-for-an-isostructural-series-of-metal-organic-frameworks
#3
Li Peng, Mehrdad Asgari, Pascal Miéville, Pascal Schouwink, Safak Bulut, Daniel Tev Sun, Zhongrui Zhou, Philip Pattison, Wouter van Beek, Wendy L Queen
Metal-organic frameworks (MOFs) have attracted much attention in the last decade owing to their unprecedented internal surface areas, tunable topologies, designable surfaces, and various potential applications. One bottleneck in the field regarding MOF synthesis is controlling the metal-containing secondary building unit (SBU) incorporated into the structure. In this work we report the synthesis and characterization of five trimeric [M3(µ3-O)(CH3CO2)6]x clusters (where M = Fe3+, Cr3+, Fe3+/Cr3+, Fe3+/Co2+, or Fe3+/Ni2+ and x = +1 or 0)...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28650054/long-pulse-laser-launch-and-ionization-of-tailored-large-neutral-silver-nanoparticles-with-atomic-mass-assignment
#4
A Gallego, U Sezer, M Arndt, M Mayor
We explore the synthesis, characterization, neutral launch and vacuum ultraviolet ionization of massive perfluorinated-alkyl-capped nanoparticles. The presence of the ligand coating in solution is corroborated by Fourier transform infrared spectroscopy (FT-IR) and the particle size distribution is analyzed by transmission electron microscopy (TEM). Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry identifies perfluoralkyl coated silver nanoparticles as the most stable species among the materials studied here...
June 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28649836/anion-dependent-assembly-of-heterometallic-3d-4f-clusters-based-on-a-lacunary-polyoxometalate
#5
Jing Cai, Xiu-Ying Zheng, Jing Xie, Zhi-Hao Yan, Xiang-Jian Kong, Yan-Ping Ren, La-Sheng Long, Lan-Sun Zheng
A series of heterometallic 3d-4f clusters, formulated as Na17[Ln3(H2O)5Ni(II)(H2O)3(Sb4O4)(SbW9O33)3(Ni(II)W6O24)(WO2)3(CH3COO)]·(H2O)65 [abbreviated as Ln3Ni2, where Ln = La(3+) (1), Pr(3+) (2), and Nd(3+) (3)], K5Na11[Ln3(H2O)3Ni(II)3(H2O)6(SbW9O33)3(WO4)(CO3)]·(H2O)40 [abbreviated as Ln3Ni3, where Ln = La(3+) (4), Pr(3+) (5), and Nd(3+) (6)], and K3Na27[Ln3Ni(II)9(μ3-OH)9(SbW9O33)2(PW9O34)3(CH3COO)3]·(H2O)80 [abbreviated as Ln3Ni9, where Ln = Dy(3+) (7) and Er(3+) (8)], were obtained through the reaction of the lacunary {SbW9O33} precursor with Ln(NO3)3·6H2O and NiCl2·6H2O in a NaAc/HAc buffer in the presence of different anions...
June 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28649827/self-poling-induced-magnetoelectric-effect-in-highly-strained-epitaxial-bifeo3-la0-67sr0-33mno3-%C3%AE-multiferroic-heterostructures
#6
Dong Li, Dongxing Zheng, Junlu Gong, Wanchao Zheng, Chao Jin, Haili Bai
Highly strained epitaxial BiFeO3/La0.67Sr0.33MnO3-δ heterostructures were fabricated on LaAlO3 substrates by magnetron sputtering. The as-grown downward self-polarization of BiFeO3 (BFO) capping layers was confirmed by piezoelectric force microscope. Through the electrostatic field induced charge screening, a hole depletion state was induced in ultrathin (8 nm) La0.67Sr0.33MnO3-δ (LSMO) films. As a result of the interfacial charge coupling, appreciable saturated magnetization (MS) increase of about 500% and 100% can be observed in LSMO with BFO capping at 5 K and 300 K, respectively...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28649791/bioactivity-and-biomineralization-ability-of-calcium-silicate-based-pulp-capping-materials-after-subcutaneous-implantation
#7
G Hinata, K Yoshiba, L Han, N Edanami, N Yoshiba, T Okiji
AIM: To evaluate the abilities of three calcium silicate-based pulp-capping materials (ProRoot MTA, TheraCal LC, and a prototype tricalcium silicate cement) to produce apatite-like precipitates after being subcutaneously implanted into rats. METHODOLOGY: Polytetrafluoroethylene tubes containing each material were subcutaneously implanted into the backs of Wistar rats. At 7, 14, and 28 days post-implantation, the implants were removed together with the surrounding connective tissue, and fixed in 2...
June 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28649022/a-portable-rgb-sensing-gadget-for-sensitive-detection-of-hg-2-using-cysteamine-capped-qds-as-fluorescence-probe
#8
Bin Chen, Jun Ma, Tong Yang, Lin Chen, Peng Fei Gao, Cheng Zhi Huang
A facile one-pot method was proposed to synthesis cysteamine capped CdTe QDs with a high quantum yield 30%. In the synthesis process, nitrogen protection, ultrasonic treatment, and light irradiation were unnecessary. Additionally, potassium tellurite was used instead of Te powder as Te source, avoiding of the time-consuming Te powder dissolution process. The prepared QDs were found to be Hg(2+) sensitive. The detection linear range for Hg(2+) was from 5 to 300nM, and the detection limit was calculated to be 1nM...
June 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28648859/ceftriaxone-versus-ceftriaxone-plus-a-macrolide-for-community-acquired-pneumonia-in-hospitalized-patients-with-hiv-aids-a-randomized-controlled-trial
#9
Claudia Figueiredo-Mello, Pontus Naucler, Marinella D Negra, Anna S Levin
OBJECTIVES: Evaluate if treatment with ceftriaxone and a macrolide, improved patient outcome when compared with monotherapy with ceftriaxone, in hospitalized patients with HIV/AIDS with community-acquired pneumonia (CAP). METHODS: Adult patients with HIV hospitalized due to suspected CAP were randomized to receive one of two regimens, ceftriaxone plus macrolide or ceftriaxone plus placebo, at a 1:1 proportion (Brazilian Clinical Trials Registry: RBR-8wtq2b). The primary outcome was in-hospital mortality and the secondary outcomes were mortality within 14 days, need for vasoactive drugs, need for mechanical ventilation, time to clinical stability and length of hospitalization...
June 22, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28648577/impact-of-cap-assisted-colonoscopy-on-learning-curve-and-quality-in-colonoscopy-a-randomized-controlled-trial
#10
Zhouwen Tang, Daniel S Zhang, Aaron P Thrift, Kalpesh K Patel
BACKGROUND AND AIMS: Colonoscopy competency assessment in trainees have traditionally been informal. Comprehensive metrics such as the Assessment of Competency in Endoscopy (ACE) tool suggest competency thresholds are higher than assumed. cap-assisted colonoscopy (CAC) may improve competency but data in novice trainees are lacking. We compare CAC versus standard colonoscopy (SC) among novice trainees in a randomized controlled trial. METHODS: All colonoscopies performed by 3 gastroenterology fellows without prior experience were eligible for enrollment...
June 22, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28648545/application-of-the-revised-who-causality-assessment-protocol-for-adverse-events-following-immunization-in-india
#11
Awnish Kumar Singh, Abram L Wagner, Jyoti Joshi, Bradley F Carlson, Satinder Aneja, Matthew L Boulton
BACKGROUND: In 2013, the World Health Organization (WHO) and CIOMS introduced a revised Causality Assessment Protocol (CAP) for Adverse Events following Immunization (AEFI). India is one of the first countries to adopt the revised CAP. This study describes the application of the revised CAP in India. METHODS: We describe use of CAP by India's AEFI surveillance program to assess reported AEFIs. Using publicly available results of causality assessment for reported AEFIs, we describe the results by demographic characteristics and review the trends for the results of the causality assessment...
June 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28648477/time-to-antibiotics-administration-and-outcome-in-community-acquired-pneumonia-secondary-analysis-of-a-randomized-controlled-trial
#12
Christophe Marti, Gregor John, Daniel Genné, Virginie Prendki, Olivier T Rutschmann, Jérôme Stirnemann, Nicolas Garin
BACKGROUND: The association between early antibiotic administration and outcomes remains controversial in patients hospitalized for community-acquired pneumonia. METHODS: We performed a secondary analysis of a randomized controlled trial comparing two antibiotic treatment strategies for patients hospitalized for moderately severe CAP. The univariate and multivariate associations between time to antibiotic administration (TTA) and time to clinical stability were assessed using a Cox proportional hazard model...
June 22, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28648077/stable-and-functionalizable-quantum-dots-with-a-thin-zwitterionic-carboxybetaine-layer
#13
Wei Yang, Jean-Rene Ella-Menye, Tao Bai, Andrew Sinclair, Shaoyi Jiang
A new type of ligand chemistry, with a zwitterionic carboxybetaine head group and a bidentate thiol end group (CBSS), is introduced to promote the stability of quantum dots (QDs) with targeting capability. Results show that QDs are stable over a broad range of pH values after surface modification. Surface binding assays and cellular internalization studies show that QDs capped with CBSS exhibit low nonspecific adsorption. The CBSS ligand also allows the conjugation of highly specific targeting ligands while effectively maintaining the nonfouling background...
June 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28647998/-analysis-of-optical-coherence-tomography-of-early-and-very-late-stent-restenosis-after-drug-eluting-stent-implantation
#14
Z J Liu, B Shi, C C Deng, G X Xu, R Z Zhao, C Y Shen, Z L Wang, H L Liu
Objective: Using optical coherence tomography (OCT) to analyze the morphological characteristics of lesions between early in-stent restenosis (E-ISR) and very late in-stent restenosis (VL-ISR) after drug-eluting stents (DES) implantation. Methods: In 25 patients (DES) with ISR, OCT images were acquired before percutaneous coronary intervention (PCI), the morphological characteristics of E-ISR (<1 years, n=14) and VL-ISR (>3 years, n=11) were compared.The quantitative and qualitative analysis of the entire stent and the minimum lumen area (MLA) site were carried out respectively...
June 20, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28647649/recovery-after-pilp-remineralization-of-dentin-lesions-created-with-two-cariogenic-acids
#15
K Saeki, Y-C Chien, G Nonomura, A F Chin, S Habelitz, L B Gower, S J Marshall, G W Marshall
OBJECTIVES: Acetate and lactate are important cariogenic acids produced by oral bacteria. They produced different residual dentin structures in artificial lesions of similar depth. We evaluated if such lesions responded in the same way to a polymer-induced-liquid-precursor (PILP) remineralization. DESIGN: Dentin blocks obtained from human third molars, divided into 6 groups (n=3). Blocks were demineralized with acetate (66h) or lactate (168h) buffer at pH 5.0 to create 140μm target lesion depths...
June 15, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28647363/cadps2-gene-expression-is-oppositely-regulated-by-lrrk2-and-alpha-synuclein
#16
Julia Obergasteiger, Christa Überbacher, Peter P Pramstaller, Andrew A Hicks, Corrado Corti, Mattia Volta
The Ca(2+)-dependent activator protein for secretion 2 (CADPS2) is a member of the CAPS/CADPS protein family that play crucial roles in synaptic vesicle dynamics. Genomic variability in the CADPS2 gene has been associated to autism spectrum disorders and Alzheimer's disease, both characterized by altered neurotransmission. Biological evidence also linked CADPS2 to Parkinson's disease (PD), as a disease-causing mutation in leucine-rich repeat kinase 2 (LRRK2) was reported to increase CADPS2 gene and protein expression...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647247/spatial-variability-and-possible-sources-of-acetate-and-formate-in-the-surface-snow-of-east-antarctica
#17
Gautami Samui, Runa Antony, Kanthanathan Mahalinganathan, Meloth Thamban
Spatial trends of acetate (Ac(-)) and formate (Fo(-)) were determined in surface snow samples along a coastal-inland transect (180km) in the ice cap region at Princess Elizabeth Land and along a coastal transect in the Amery Ice Shelf (130km), East Antarctica. Variations in both Ac(-) and Fo(-) seem to be unrelated to the acidity of snow. Ionic balance determined for the snow samples indicate the availability of HNO3 that could undergo photolysis to produce hydroxyl radical (OH), one of the major reactants involved in oxidation reactions with organic matter...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646939/hounsfield-units-for-nephrolithiasis-predictive-power-for-the-clinical-urologist
#18
Andrew Cohen, Blake Anderson, Glenn Gerber
INTRODUCTION: We aim to determine the optimal method for measuring Hounsfield Units (HU) of calculi for the clinical urologist. MATERIALS AND METHODS: We present a single institution prospective study from 2014-2015 for 125 consecutive patients. Demographics, baseline characteristics, imaging, and stone analysis were collected. CT scanners and settings were heterogeneous. Hounsfield units were measured by use of ellipsoid tool and free hand outline by two independent urology graders using Philips iSite PACs...
June 2017: Canadian Journal of Urology
https://www.readbyqxmd.com/read/28646867/a-high-quality-annotated-transcriptome-of-swine-peripheral-blood
#19
Haibo Liu, Timothy P L Smith, Dan J Nonneman, Jack C M Dekkers, Christopher K Tuggle
BACKGROUND: High throughput gene expression profiling assays of peripheral blood are widely used in biomedicine, as well as in animal genetics and physiology research. Accurate, comprehensive, and precise interpretation of such high throughput assays relies on well-characterized reference genomes and/or transcriptomes. However, neither the reference genome nor the peripheral blood transcriptome of the pig have been sufficiently assembled and annotated to support such profiling assays in this emerging biomedical model organism...
June 24, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28646778/the-hydrological-functioning-of-a-constructed-fen-wetland-watershed
#20
Scott J Ketcheson, Jonathan S Price, Owen Sutton, George Sutherland, Eric Kessel, Richard M Petrone
Mine reclamation requires the reconstruction of entire landforms and drainage systems. The hydrological regime of reclaimed landscapes will be a manifestation of the processes operating within the individual landforms that comprise it. Hydrology is the most important process regulating wetland function and development, via strong controls on chemical and biotic processes. Accordingly, this research addresses the growing and immediate need to understand the hydrological processes that operate within reconstructed landscapes following resource extraction...
June 21, 2017: Science of the Total Environment
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