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https://www.readbyqxmd.com/read/29169136/degradation-of-diethyl-phthalate-dep-by-uv-persulfate-an-experiment-and-simulation-study-of-contributions-by-hydroxyl-and-sulfate-radicals
#1
Ziying Wang, Yisheng Shao, Naiyun Gao, Xian Lu, Na An
Degradation of diethyl phthalate (DEP) by ultraviolet/persulfate (UV/PS) process at different reaction conditions was evaluated. DEP can be degraded effectively via this process. Both tert-butyl (TBA) and methanol (MeOH) inhibited the degradation of DEP with MeOH having a stronger impact than TBA, suggesting sulfate radical () and hydroxyl radical (HO) both existed in the reaction systems studied. The second-order rate constants of DEP reacting with and HO were calculated to be (6.4±0.3)×10(7) M(-1)s(-1) and (3...
November 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/29169095/bioactivity-and-properties-of-an-adhesive-system-functionalized-with-an-experimental-niobium-based-glass
#2
Karina Kato Carneiro, Taylan Pinheiro Araujo, Edilausson Moreno Carvalho, Marcia Margarete Meier, Auro Tanaka, Ceci Nunes Carvalho, José Bauer
OBJECTIVE: This study evaluated the incorporation of niobophosphate bioactive glass (NbG) fillers into a commercial adhesive resin. MATERIALS AND METHODS: The silanized (NbGs) or non-silanized (NbG) NbG was added to the commercial adhesive system One Step (OS) at 30% by weight; unfilled adhesive served as control. The bioactivity of adhesives was analyzed by SEM and FTIR/ATR after 28 days in PBS. The adhesives were evaluated as regards microtensile bond strength immediately and after six months (n = 6); degree of conversion (n = 3), microhardness (n = 5); and radiopacity (n = 3)...
November 10, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29169080/novel-and-rare-prenyllipids-occurrence-and-biological-activity
#3
REVIEW
Renata Szymańska, Jerzy Kruk
The data presented indicate that there is a variety of unique prenyllipids, often of very limited taxonomic distribution, whose origin, biosynthesis, metabolism and biological function deserves to be elucidated. These compounds include tocoenols, tocochromanol esters, tocochromanol acids, plastoquinones and ubiquinones. Additionally, based on the available data, it can be assumed that there are still unrecognized prenyllipids, like prenylquinols fatty acid esters of the hydroquinone ring, including prenylquinol phosphates, and others, whose biological function might be of great importance...
November 14, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29169041/the-shewanella-woodyi-galactokinase-pool-phosphorylates-glucose-at-the-6-position
#4
Louis Patrick Conway, Fang Fang Liu, Qian Li, Josef Voglmeir
Galactokinases are a class of enzymes which belong to the GHMP (galactokinase, homoserine kinase, mevalonate kinase, and phosphomevalonate kinase) superfamily and catalyse the phosphorylation of galactose in the first step of the Leloir pathway. Here we report the discovery of three enzymes from Shewanella woodyi which have been classified as galactokinases based on sequence similarity. However, each of these enzymes show little to no significant activity towards galactose and instead exhibit a strong preference for glucose...
October 31, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/29168776/enhancement-of-osteoblastic-like-cell-activity-by-glow-discharge-plasma-surface-modified-hydroxyapatite-%C3%AE-tricalcium-phosphate-bone-substitute
#5
Eisner Salamanca, Yu-Hwa Pan, Aileen I Tsai, Pei-Ying Lin, Ching-Kai Lin, Haw-Ming Huang, Nai-Chia Teng, Peter D Wang, Wei-Jen Chang
Glow discharge plasma (GDP) treatments of biomaterials, such as hydroxyapatite/β-tricalcium phosphate (HA/β-TCP) composites, produce surfaces with fewer contaminants and may facilitate cell attachment and enhance bone regeneration. Thus, in this study we used argon glow discharge plasma (Ar-GDP) treatments to modify HA/β-TCP particle surfaces and investigated the physical and chemical properties of the resulting particles (HA/β-TCP + Ar-GDP). The HA/β-TCP particles were treated with GDP for 15 min in argon gas at room temperature under the following conditions: power: 80 W; frequency: 13...
November 23, 2017: Materials
https://www.readbyqxmd.com/read/29168569/point-of-use-fortification-of-foods-with-micronutrient-powders-containing-iron-in-children-of-preschool-and-school-age
#6
REVIEW
Luz Maria De-Regil, Maria Elena D Jefferds, Juan Pablo Peña-Rosas
BACKGROUND: Approximately 600 million children of preschool and school age are anaemic worldwide. It is estimated that at least half of the cases are due to iron deficiency. Point-of-use fortification of foods with micronutrient powders (MNP) has been proposed as a feasible intervention to prevent and treat anaemia. It refers to the addition of iron alone or in combination with other vitamins and minerals in powder form, to energy-containing foods (excluding beverages) at home or in any other place where meals are to be consumed...
November 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29168535/highly-reliable-and-low-noise-solid-state-nanopores-with-an-atomic-layer-deposited-zno-membrane-on-a-quartz-substrate
#7
Kyeong-Beom Park, Hyung-Jun Kim, Yun-Ho Kang, Jae-Seok Yu, Hongsik Chae, Kidan Lee, Hyun-Mi Kim, Ki-Bum Kim
We present a fabrication scheme for a solid-state ZnO nanopore membrane directly deposited on top of a quartz substrate by atomic layer deposition (ALD) and investigate the characteristics of DNA translocation through the nanopores. We chose a ZnO membrane owing to its high isoelectric point (∼9.5) as well as its chemical and mechanical stability. Aside from the extremely low noise level exhibited by this device on a highly insulating and low dielectric quartz substrate, it also slows down the translocation speed of DNA by more than one order of magnitude as compared to that of a SiNx nanopore device...
November 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/29168423/vitamin-d-levels-in-children-and-adolescents-with-obsessive-compulsive-disorder
#8
Kemal Utku Yazici, Ipek Percinel Yazici, Bilal Ustundag
BACKGROUND: Recent studies showed that vitamin D deficiency may lead to dysfunctional changes in the brain and may be associated with neuropsychiatric diseases. AIMS: The present study aims to investigate vitamin D, calcium, phosphorus and alkaline phosphatase levels in children and adolescents diagnosed with obsessive-compulsive disorder (OCD) and compared them to healthy controls. Additionally, the correlation of OCD symptom severity with serum vitamin D level will be analyzed...
November 23, 2017: Nordic Journal of Psychiatry
https://www.readbyqxmd.com/read/29168342/sphingosine-1-phosphate-s1p-enhances-glomerular-endothelial-cells-activation-mediated-by-anti-myeloperoxidase-antibody-positive-igg
#9
Xiao-Jing Sun, Min Chen, Ming-Hui Zhao
Cumulating evidences suggested an important role of sphingosine-1-phosphate (S1P) and its receptors in regulating endothelial barrier integrity. Our previous study revealed that the circulating S1P levels and renal expression of S1PRs correlated with disease activity and renal damage in patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). This study investigated the role of S1P and its receptors in myeloperoxidase (MPO)-ANCA-positive IgG-mediated glomerular endothelial cell (GEnC) activation...
November 23, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29167981/transcriptional-induction-of-two-phosphate-transporter-1-genes-and-enhanced-root-branching-in-grape-plants-inoculated-with-funneliformis-mosseae
#10
Laure Valat, Laurence Deglène-Benbrahim, Melha Kendel, Réjane Hussenet, Christine Le Jeune, Paul Schellenbaum, Pascale Maillot
We investigated the effects of the arbuscular mycorrhizal fungus (AMF) Funneliformis mosseae on the growth and root architecture of plantlets of the grape rootstock 41B MGt under hydroponic conditions, and analyzed the concomitant expression of putative mycorrhizal-specific phosphate transporter 1 (PHT1) genes. In vitro propagated plantlets were acclimatized to ex vitro culture before AMF inoculation and grown under low phosphate (Pi) nutrition conditions during 6 weeks. Grape roots could be efficiently colonized by F...
November 22, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/29167526/phospholipase-a2-responsive-phosphate-micelle-loaded-ucnps-for-bioimaging-of-prostate-cancer-cells
#11
Mirkomil Sharipov, Salah M Tawfik, Zayakhuu Gerelkhuu, Bui The Huy, Yong-Ill Lee
We report the effective synthesis of biocompatible upconversion nanoparticles (UCNP)-loaded phosphate micelles and successful delivery of UCNPs to prostate cancer cells via secreted phospholipase A2 (sPLA-2) enzyme cleavage of the loaded micelles for the first time. The activity of the (sPLA-2) enzyme toward the synthesized micelles was investigated and confirmed by LC-MS. TEM results showed that the micelles have a size distribution of 80 to 150 nm, whereas UCNP-loaded micelles range from 200 to 350 nm, indicating the successful loading of UCNPs...
November 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29167468/transcriptome-and-metabolite-analyses-reveal-the-complex-metabolic-genes-involved-in-volatile-terpenoid-biosynthesis-in-garden-sage-salvia-officinalis
#12
Mohammed Ali, Penghui Li, Guangbiao She, Daofu Chen, Xiaochun Wan, Jian Zhao
A large number of terpenoid compounds have been extracted from different tissues of S. officinalis. However, the molecular genetic basis of terpene biosynthesis pathways is virtually unknown. In this study, approximately 6.6 Gb of raw data were generated from the transcriptome of S. officinalis leaves using Illumina HiSeq 2000 sequencing. After filtering and removing the adapter sequences from the raw data, the number of reads reached 21 million, comprising 98 million of high-quality nucleotide bases. 48,671 unigenes were assembled de novo and annotated for establishing a valid database for studying terpenoid biosynthesis...
November 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29167463/structural-insights-into-the-committed-step-of-bacterial-phospholipid-biosynthesis
#13
Zhenjian Li, Yannan Tang, Yiran Wu, Suwen Zhao, Juan Bao, Yitian Luo, Dianfan Li
The membrane-integral glycerol 3-phosphate (G3P) acyltransferase PlsY catalyses the committed and essential step in bacterial phospholipid biosynthesis by acylation of G3P, forming lysophosphatidic acid. It contains no known acyltransferase motifs, lacks eukaryotic homologs, and uses the unusual acyl-phosphate as acyl donor, as opposed to acyl-CoA or acyl-carrier protein for other acyltransferases. Previous studies have identified several PlsY inhibitors as potential antimicrobials. Here we determine the crystal structure of PlsY at 1...
November 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/29167409/sphingosine-1-phosphate-activation-of-erm-contributes-to-vascular-calcification
#14
Thomas G Morris, Samantha J Borland, Christopher J Clarke, Claire Wilson, Yusuf A Hannun, Vasken Ohanian, Ann E Canfield, Jacqueline Ohanian
Vascular calcification is the deposition of mineral in the artery wall by vascular smooth muscle cells (VSMC) in response to pathological stimuli. The process is similar to bone formation and is an independent risk factor for cardiovascular disease. Given that ceramide and sphingosine 1-phosphate (S1P) are involved in cardiovascular pathophysiology and biomineralisation, their role in VSMC matrix mineralisation was investigated. During phosphate-induced VSMC mineralisation, endogenous S1P levels increased accompanied by increased sphingosine kinase (SK) activity, and increased mRNA expression of SK1 and SK2...
November 22, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/29167320/mapks-influence-pollen-tube-growth-by-controlling-the-formation-of-phosphatidylinositol-4-5-bisphosphate-in-an-apical-plasma-membrane-domain
#15
Franziska Hempel, Irene Stenzel, Mareike Heilmann, Praveen Krishnamoorthy, Wilhelm Menzel, Ralph Golbik, Stefan Helm, Dirk Dobritzsch, Sacha Baginsky, Justin Lee, Wolfgang Hoehenwarter, Ingo Heilmann
An apical plasma membrane domain enriched in the regulatory phospholipid phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) is critical for polar tip growth of pollen tubes. How the biosynthesis of PtdIns(4,5)P2 by phosphatidylinositol 4-phosphate 5-kinases (PI4P 5-kinases) is controlled by upstream signaling is currently unknown. The pollen-expressed PI4P 5-kinase PIP5K6 is required for clathrin-mediated endocytosis and polar tip growth in pollen tubes. Here, we identify PIP5K6 as a target of the pollen-expressed mitogen-activated protein kinase MPK6 and characterize the regulatory effects...
November 22, 2017: Plant Cell
https://www.readbyqxmd.com/read/29166855/identification-of-differentially-expressed-genes-in-flower-leaf-and-bulb-scale-of-lilium-oriental-hybrid-sorbonne-and-putative-control-network-for-scent-genes
#16
Fang Du, Junmiao Fan, Ting Wang, Yun Wu, Donald Grierson, Zhongshan Gao, Yiping Xia
BACKGROUND: Lily is an economically important plant, with leaves and bulbs consisting of overlapping scales, large ornamental flowers and a very large genome. Although it is recognized that flowers and bulb scales are modified leaves, very little is known about the genetic control and biochemical differentiation underlying lily organogenesis and development. Here we examined the differentially expressed genes in flower, leaf and scale of lily, using RNA-sequencing, and identified organ-specific genes, including transcription factors, genes involved in photosynthesis in leaves, carbohydrate metabolism in bulb scales and scent and color production in flowers...
November 22, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29166711/-effects-of-caspase-1-inhibitor-vx765-on-cold-restraint-stress-induced-acute-gastric-ulcer-in-mice
#17
S Q Zheng, X D Hong, T S Chen, P F Luo, S C Xiao
Objective: To investigate the protective effects of caspase-1 inhibitor VX765 on gastric mucosa of mice with cold-restraint stress-induced acute gastric ulcer. Methods: Twenty-four specific pathogen free male C57BL/6J mice were divided into normal control group (NC), cold restrain group (CR), VX765 pre-treatment+ cold restrain group (VCR), and rabeprazole pre-treatment+ cold restrain group (RCR) according to the random number table, with 6 mice in each group. Mice in group NC were injected intraperitoneally with solution of 10 mL/kg dimethylsulfoxide (DMSO) and phosphate buffer solution (PBS)...
November 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/29166707/-establishment-of-myocardial-targeted-nanoparticles-and-preliminary-evaluation-of-its-effects-on-prevention-and-treatment-of-myocardial-injury
#18
Y Y Liu, C Wang, P F Luo, Z F Xia
Objective: To establish 3-{4-[2-hydroxyl-(1-methylethylamino) propoxy] phenyl} propionic acid cetylesters (PAC) modified nanoparticles, and preliminarily explore its cardiomyocyte-targeting function and protection effects on myocardium. Methods: (1) HL-1 myocardial cells were divided into cyanidin-3 (Cy3) marked non-targeted small interference RNA (Cy3-siNC) group and Cy3 marked small interference RNA designed for the nuclear factor kappa B (NF-κB)-p65 gene (Cy3-si435) group according to the random number table, with 3 wells in each group...
November 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/29166416/limited-effect-of-cement-material-on-stress-distribution-of-a-monolithic-translucent-zirconia-crown-a-three-dimensional-finite-element-analysis
#19
Sebastian Franco-Tabares, Victoria Franke Stenport, Lars Hjalmarsson, Carina B Johansson
PURPOSE: The literature shows that the performance of densely sintered zirconia single crowns seems to be unaffected by the cement material. The purpose of this study was to evaluate the effects of various cement materials on the stress distribution in a monolithic translucent zirconia crown. MATERIALS AND METHODS: A crown-cement-dentin complex was modeled. Six cements were evaluated: zinc phosphate, glass-ionomer, resin-modified glass-ionomer, dual-cure resin, calcium aluminate-based, and a theoretical or conceptual cement with mechanical properties close to those of dentin (ie, monoblock cement)...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29165990/uio-66-nh2-mof-nucleation-on-tio2-zno-and-al2o3-ald-treated-polymer-fibers-role-of-metal-oxide-on-mof-growth-and-catalytic-hydrolysis-of-chemical-warfare-agent-simulants
#20
Dennis T Lee, Junjie Zhao, Christopher J Oldham, Gregory W Peterson, Gregory N Parsons
Metal-organic frameworks (MOFs) chemically bound to polymeric microfibrous textiles show promising performance for many future applications. In particular, Zr-based UiO-66-family MOF-textiles have been shown to catalytically degrade highly toxic chemical warfare agents (CWAs), where favorable MOF/polymer bonding and adhesion are attained by placing a nanoscale metal-oxide layer on the polymer fiber preceding MOF growth. To date, however, the nucleation mechanism of Zr-based MOFs on different metal oxides and how product performance is affected are not well understood...
November 22, 2017: ACS Applied Materials & Interfaces
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