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https://www.readbyqxmd.com/read/28944377/mini-interfacial-fracture-toughness-of-a-multimode-adhesive-bonded-to-plasma-treated-dentin
#1
Ana Paula Almeida Ayres, Pong Pongprueksa, Jan De Munck, Cristina Parise Gré, Fábio Dupart Nascimento, Marcelo Giannini, Bart Van Meerbeek
PURPOSE: To investigate the bonding efficacy of a multimode adhesive to plasma-treated and -untreated (control) dentin using a mini-interfacial fracture toughness (mini-iFT) test. MATERIALS AND METHODS: Twenty human molars were used in a split-tooth design (n = 10). The adhesive Scotchbond Universal (SBU; 3M ESPE) was applied in etch-and-rinse (E&R) and self-etch (SE) modes. Mid-coronal dentin was exposed and covered with a standardized smear layer ground to 320 grit...
September 21, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28943100/validation-of-a-pharmacological-model-for-mitochondrial-dysfunction-in-healthy-subjects-using-simvastatin-a-randomized-placebo-controlled-proof-of-pharmacology-study
#2
Marcus P J van Diemen, Cécile L Berends, Naila Akram, Joep Wezel, Wouter M Teeuwisse, Bert G Mik, Hermien E Kan, Andrew Webb, Jan Willem M Beenakker, Geert Jan Groeneveld
Proof-of-pharmacology models to study compounds in healthy subjects offer multiple advantages. Simvastatin is known to induce mitochondrial dysfunction at least partly by depletion of co-enzyme Q10. The goal of this study was to evaluate a model of simvastatin-induced mitochondrial dysfunction in healthy subjects and to determine whether mitochondrial dysfunction could be pharmacologically reversed by treatment with co-enzyme Q10 (ubiquinol). Subjects received simvastatin 40mg/day for 8 weeks. After 4 weeks, subjects were randomized to receive ubiquinol 300mg/day or placebo in a double-blinded fashion...
September 21, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28942836/assessment-of-two-carrier-materials-for-phosphate-solubilizing-biofertilizers-and-their-effect-on-growth-of-wheat-triticum-aestivum-l
#3
Salma Mukhtar, Izzah Shahid, Samina Mehnaz, Kauser A Malik
Biofertilizers are usually carrier-based inoculants containing beneficial microorganisms. Incorporation of microorganisms in carrier material enables easy-handling, long-term storage and high effectiveness of biofertilizers. Objective of the present study was to assess enriched biogas sludge and soil as biofertilizer carriers on growth and yield of wheat. Six phosphate solubilizing strains were used in this study. Three phosphate solubilizing strains, 77-NS2 (Bacillus endophyticus), 77-CS-S1 (Bacillus sphaericus) and 77-NS5 (Enterobacter aerogenes) were isolated from the rhizosphere of sugarcane, two strains, PSB5 (Bacillus safensis) and PSB12 (Bacillus megaterium) from the rhizosphere of wheat and one halophilic phosphate solubilizing strain AT2RP3 (Virgibacillus sp...
December 2017: Microbiological Research
https://www.readbyqxmd.com/read/28942331/a-radioluminescent-nuclear-battery-using-volumetric-configuration-63-ni-solution-zns-cu-al-ingap
#4
Johnny Russo, Marc Litz, William Ray, Brenda Smith, Richard Moyers
Energy dense power sources are critical to the development of compact, remote sensors for terrestrial and space applications. Nuclear batteries using β(-)-emitting radioisotopes possess energy densities 1000 times greater than chemical batteries. Their power generation is a function of β(-) flux saturation point relative to the planar (2D) configuration, β(-) range, and semiconductor converter. An approach to increase power density in a beta-photovoltaic (β-PV) nuclear battery is described. By using volumetric (3D) configuration, the radioisotope, nickel-63 ((63)Ni) in a chloride solution was integrated in a phosphor film (ZnS:Cu,Al) where the β(-) energy is converted into optical energy...
September 14, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28941884/cooperative-upconversion-luminescence-of-er-3-in-gd2o3-xsx-phosphor
#5
Fei Wang, Bin Yang, Qingchun Yu, Dachun Liu, Wenhui Ma
Gd2O3-xSx:Er crystals were prepared through high-temperature solid-state reaction method in vacuum, with the vacuum synthesis mechanism determined by thermal analysis. The crystal structure and upconversion luminescence properties were investigated respectively by XRD, TEM and spectrophotometer. Well crystallized Gd2O2S:Er phosphors were prepared under 1000°C in vacuum with a certain excessive amount of sulfur content than stoichiometric. It is confirmed that with the increasing sulfur content the green emission was enhanced and red emission was weakened...
September 13, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28941047/mesoporous-semimetallic-conductors-structural-and-electronic-properties-of-cobalt-phosphide-systems
#6
Malay Pramanik, Satoshi Tominaka, Zhong-Li Wang, Toshiaki Takei, Yusuke Yamauchi
Mesoporous cobalt phosphide (meso-CoP) was prepared by the phosphorization of ordered mesoporous cobalt oxide (meso-Co3 O4 ). The electrical conductivity of meso-CoP is 37 times higher than that of nonporous CoP, and it displays semimetallic behavior with a negligibly small activation energy of 26 meV at temperatures below 296 K. Above this temperature, only materials with mesopores underwent a change in conductivity from semimetallic to semiconducting behavior. These properties were attributed to the coexistence of nanocrystalline Co2 P phases...
September 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28940428/maternal-alcohol-use-and-nutrition-during-pregnancy-diet-and-anthropometry
#7
R Colin Carter, Marjanne Senekal, Neil C Dodge, Lori Bechard, Ernesta M Meintjes, Christopher D Molteno, Christopher Duggan, Joseph L Jacobson, Sandra W Jacobson
BACKGROUND: Despite known risks of prenatal nutritional deficiencies and studies documenting increased prevalence of poor dietary intake among non-pregnant alcohol abusers, the nutritional status of heavy drinking pregnant women remains largely unstudied. Animal models have found interactions between prenatal ethanol exposure and micronutrients, such as choline, folate, B12, and iron, and human studies have reported that lower maternal weight and body mass confer increased fetal alcohol-related risk...
September 20, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28939827/white-light-emitting-diodes-based-on-individual-polymerized-carbon-nanodots
#8
Zheng Xie, Zhengmao Yin, Yongzhong Wu, Chunyan Liu, Xiaopeng Hao, Qingqing Du, Xiangang Xu
A search for new phosphor materials that exhibit high light-emission, spectral purity, long-time stability and processability capture particular attention to modern solid-state lighting. Here, polymerizable silane pre-functionalized carbon dot (SiCD) fluids were dripped and co-polymerized or completely bulk polymerized to build color conversion and encapsulation coatings of commercially available GaN blue LEDs. Most parameters of SiCD-based white LEDs were similar to or even better than those of phosphor-based white LEDs, particularly the insensitivity to excitation wavelength and working current...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28938583/ppa1-regulates-tumor-malignant-potential-and-clinical-outcome-of-colon-adenocarcinoma-through-jnk-pathways
#9
Ping Wang, Yi Zhou, Qi Mei, Jing Zhao, Liu Huang, Qiang Fu
Colorectal cancer (CRC) represents one of the most prevalent malignancies and the third leading cause of cancer death worldwide. Inorganic pyrophosphatase (PPA1) is an enzyme that catalyzes the hydrolysis of pyrophosphate to inorganic phosphate, therefore participates in the energy metabolism. Proteomic studies have demonstrated the up-regulated expression of PPA1 in various tumors, however, its expression pattern in CRC hasn't been reported. In the current study, we used RT-qCR, Western Blot and immunohistochemical (IHC) staining to explore the expression of PPA1 in 113 paired colon cancer tissues and adjacent normal tissues, which revealed that PPA1 was correlated with lymph node metastasis...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938463/role-of-cyp51-in-the-regulation-of-t3-and-fsh-induced-steroidogenesis-in-female-mice
#10
Juan Liu, Ye Tian, Yu Ding, Dai Heng, Kaili Xu, Wenbo Liu, Cheng Zhang
Cytochrome P450 lanosterol 14α-demethylase (CYP51) is a key enzyme in sterols and steroids biosynthesis that involved in folliculogenesis and oocyte maturation, which is regulated by follicle stimulating hormone (FSH), as a key reproductive hormone during follicular development. Thyroid hormone (TH) is also important for normal reproductive function. Although T3 enhances FSH-induced preantral follicle growth, whether and how TH combines with FSH to regulate CYP51 expression during preantral to early antral transition stage is unclear...
August 18, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938216/efficient-removal-of-priority-hazardous-priority-and-emerging-pollutants-with-prunus-armeniaca-functionalized-biochar-from-aqueous-wastes-experimental-optimization-and-modeling
#11
Maja Turk Sekulić, Sabolč Pap, Zoran Stojanović, Nikola Bošković, Jelena Radonić, Tatjana Šolević Knudsen
This paper investigates the ability of the phosphoric acid functionalized Prunus armeniaca stones biochar (AsPhA) prepared by thermochemical activation to remove lead (Pb(2+)), cadmium (Cd(2+)), nickel (Ni(2+)), naproxen and chlorophenols from aqueous wastes. The engineered biochar was characterized using the Scanning Electron Microscopy, Energy-dispersive X-ray Spectroscopy, Fourier Transform Infrared Spectroscopy and Brunauer, Emmett and Teller technique. The batch studies were performed by varying the initial pH of the solution (2-9), adsorbent dosage (0...
September 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28938168/energy-transfer-and-color-tunable-emission-in-tb-3-eu-3-co-doped-sr3lana-po4-3f-phosphors
#12
Shuo Li, Ning Guo, Qimeng Liang, Yu Ding, Huitao Zhou, Ruizhuo Ouyang, Wei Lü
A group of color tunable Sr3LaNa(PO4)3F:Tb(3+),Eu(3+) phosphors were prepared by conventional high temperature solid state method. The phase structures, luminescence properties, fluorescence lifetimes and energy transfer were investigated in detail. Under 369nm excitation, owing to efficient energy transfer of Tb(3+)→Eu(3+), the emission spectra both have green emission of Tb(3+) and red emission of Eu(3+). An efficient energy transfer occur in Tb(3+), Eu(3+) co-doped Sr3LaNa(PO4)3F phosphors. The most possible mechanism of energy transfer is dipole-dipole interaction by Dexter's theoretical model...
September 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28938020/seasonal-variations-in-carbon-nitrogen-and-phosphorus-concentrations-and-c-n-p-stoichiometry-in-different-organs-of-a-larix-principis-rupprechtii-mayr-plantation-in-the-qinling-mountains-china
#13
Hailiang Li, M James C Crabbe, Fuli Xu, Weiling Wang, Lihui Ma, Ruilong Niu, Xing Gao, Xingxing Li, Pei Zhang, Xin Ma, Haikui Chen
Understanding how concentrations of elements and their stoichiometry change with plant growth and age is critical for predicting plant community responses to environmental change. We used long-term field experiments to explore how the leaf, stem and root carbon (C), nitrogen (N) and phosphorous (P) concentrations and their stoichiometry changed with growth and stand age in a L. principis-rupprechtii Mayr. plantation from 2012-2015 in the Qinling Mountains, China. Our results showed that the C, N and P concentrations and stoichiometric ratios in different tissues of larch stands were affected by stand age, organ type and sampling month and displayed multiple correlations with increased stand age in different growing seasons...
2017: PloS One
https://www.readbyqxmd.com/read/28936766/use-of-lactobacilli-in-cereal-legume-fermentation-and-as-potential-probiotics-towards-phytate-hydrolysis
#14
Girish K Amritha, G Venkateswaran
Phytate is a potent inhibitor of mineral absorption in humans occurring in plant-based food. Application of lactobacilli that produce phytate-degrading enzymes (phytases) to reduce phytate is an interesting yet a not much explored sector of research. Therefore, phytate dephosphorylation by Lactobacillus plantarum MTCC 1325 was evaluated. Cells at stationary phase showed phytase activity which was maximal at 24 h of growth. Glucose concentration and the type of phosphorous source in the media modulated the enzyme activity...
September 21, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28934701/hydrothermal-synthesis-of-4zno%C3%A2-b2o3%C3%A2-h2o-ln-3-ln-eu-tb-phosphors-morphology-tunable-and-luminescence-properties
#15
Shiwei Cao, Yang Jiao, Weifang Han, Chunhua Ge, Bo Song, Jie Wang, Xiangdong Zhang
4ZnO·B2O3·H2O:Ln(3+) (Ln=Eu, Tb) phosphors with different morphologies have been successfully synthesized via one-step hydrothermal method through regulating the molar amount of Eu(3+) and Tb(3+). Comprehensive scanning electron microscopy (SEM), X-ray diffraction (XRD) Fourier transform infrared spectrum (FT-IR) and inductively coupled plasma atomic emission spectrometer (ICP-AES) characterizations all confirm that obtained products are 4ZnO·B2O3·H2O:Ln(3+) (Ln=Eu, Tb). The experimental results displayed that the morphology and photoluminescence of compounds is regularly changed with increased the molar amount of rare earth ions...
September 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28934608/chemical-free-fabrication-of-n-p-dual-doped-honeycomb-like-carbon-as-an-efficient-electrocatalyst-for-oxygen-reduction
#16
Lianwen Zhu, Jun Wu, Qiao Zhang, Xiangkui Li, Yiming Li, Xuebo Cao
Heteroatom-doped nanoporous carbons are now emerging as alternatives to platinum and its alloys as electrocatalysts to facilitate oxygen reduction reaction in metal-air batteries and fuel cells. However, the synthesis of nanoporous carbons usually involve in complicated procedures and intensive chemicals, which may dramatically raise their manufacture cost that even surpasses that of precious platinum. Herein, we demonstrate the single-step, chemical-free fabrication of N, P dualdoped honeycomb carbon that has hierarchically porous structure and oxygen electrocatalysis activity close to the benchmark Pt/C...
August 23, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28933533/luminescence-tuning-thermal-quenching-and-electronic-structure-of-narrow-band-red-emitting-nitride-phosphors
#17
Dianpeng Cui, Zhen Song, Zhiguo Xia, Quanlin Liu
Exploring high-performance narrow-band red-emitting phosphor is an important challenge for improving white light LEDs. Here, on the basis of three interesting nitride phosphors with similar vierer rings framework structure, two phosphor series, Eu(2+)-doped Sr(LiAl)1-xMg2xAl2N4 and Sr(LiAl3)1-y(Mg3Si)yN4 (x, y = 0-1), are successfully synthesized by a solid state reaction. They show narrow-band red emission with tunable emission peaks from 614 to 658 nm and 607 to 663 nm. The varying luminescence behaviors with composition and structure are discussed based on centroid shift, crystal field splitting and Stokes shift...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933294/biodegradable-black-phosphorus-based-nanomaterials-in-biomedicine-theranostic-applications
#18
Zhen Wang, Zhiming Liu, Chengkang Su, Biwen Yang, Xixi Fei, Yi Li, Yuqing Hou, Henan Zhao, Yanxian Guo, Zhengfei Zhuang, Huiqing Zhong, Zhouyi Guo
Ascribe to the unique two-dimensional planar nanostructure with exceptional physical and chemical properties, black phosphorous (BP) as the emerging inorganic two-dimensional nanomaterial with high biocompatibility and degradability has been becoming one of the most promising materials of great potentials in biomedicine. The exfoliated BP sheets possess ultra-high surface area available for valid bio-conjugation and molecular loading for chemotherapy. Utilizing the intrinsic near-infrared optical absorbance, BP-based photothermal therapy in vivo, photodynamic therapy and biomedical imaging has been realized, achieving unprecedented anti-tumor therapeutic efficacy in animal experiments...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28931857/eu-3-activated-la2moo6-la2wo6-red-emitting-phosphors-with-ultrabroad-excitation-band-for-white-light-emitting-diodes
#19
Peng Du, Jae Su Yu
A series of novel Eu(3+)-activated La2MoO6-La2WO6 red-emitting phosphors have been successfully prepared by a citrate-assisted sol-gel process. Both photoluminescence excitation and emission spectra suggest that the resultant products have the strong ultrabroad absorption band ranging from 220 to 450 nm. Under the excitation of 379 nm, the characteristic emissions of Eu(3+) ions corresponding to the (5)D0 → (7)F J transitions are observed in the doped samples. The optimal doping concentration for Eu(3+) ions is found to be 12 mol% and the quenching mechanism is attributed to the dipole-dipole interaction...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927358/understanding-fe-2-toxicity-and-p-deficiency-tolerance-in-rice-for-enhancing-productivity-under-acidic-soils
#20
Sudip Das, Wricha Tyagi, Mayank Rai, Julia S Yumnam
Plants experience low phosphorus (P) and high iron (Fe) levels in acidic lowland soils that lead to reduced crop productivity. A better understanding of the relationship between these two stresses at molecular and physiological level will lead to development of suitable strategies to increase crop productivity in such poor soils. Tolerance for most abiotic stresses including P deficiency and Fe toxicity is a quantitative trait in rice. Recent studies in the areas of physiology, genetics, and overall metabolic pathways in response to P deficiency of rice plants have improved our understanding of low P tolerance...
April 2017: Biotechnology & Genetic Engineering Reviews
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