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Phosphorus

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https://www.readbyqxmd.com/read/29793208/enhanced-phosphate-removal-from-wastewater-by-using-in-situ-generated-fresh-trivalent-fe-composition-through-the-interaction-of-fe-ii-on-caco-3
#1
Yujie Li, Xiaoman He, Huimin Hu, Tingting Zhang, Jun Qu, Qiwu Zhang
Excessive existences of nutrients such as phosphate in the aqueous environment remain as a heavy concern although many researches have been reported for dealing with their removal. Based on the understanding toward the interactions of Fe compounds with phosphate and carbonate from many available researches, we designed a very simple and efficient approach for phosphate removal by using in situ generated fresh trivalent Fe composition through the interaction of Fe(II) as FeSO4 on CaCO3 . Addition and agitation of Fe(II) and CaCO3 simultaneously to phosphate solution allowed an amorphous Fe(III)-P or Ca-Fe(III)-P precipitation, with a phosphate removal rate close to 100%, to reduce the residual phosphorus concentration less than 0...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29793118/efficient-resource-recycling-from-liquid-digestate-by-microalgae-yeast-mixed-culture-and-the-assessment-of-key-gene-transcription-related-to-nitrogen-assimilation-in-microalgae
#2
Lei Qin, Lu Liu, Zhongming Wang, Weining Chen, Dong Wei
To determine the feasibility of microalgae-yeast mixed culture using the liquid digestate of dairy wastewater (LDDW) for biofuels and single cell protein (SCP) production, the cell growth, nutrient removal and outputs evaluation of the mono and mixed culture of Chlorella vulgaris and Yarrowia lipolytica in LDDW were investigated by adding glycerol as carbon source. The results showed that the mixed culture could enhance the biological utilization efficiency of nitrogen and phosphorus, and obtain higher yield of biomass (1...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29792333/characterisation-of-a-scalable-donor-based-singlet-triplet-qubit-architecture-in-silicon
#3
Prasanna Pakkiam, Matthew Gregory House, Dr Matthias Koch, Michelle Y Simmons
We present a donor based quadruple quantum dot device, designed to host two singlet-triplet qubits fabricated by scanning tunnelling microscope lithography, with just two leads per qubit. The design is geometrically compact with each pair of dots independently controlled via one gate and one reservoir. The reservoirs both supply electrons for the dots and measure the singlet-triplet state of each qubit via dispersive sensing. We verify the locations of the four phosphorus donor dots via an electrostatic model of the device...
May 24, 2018: Nano Letters
https://www.readbyqxmd.com/read/29791875/effects-of-potassium-application-on-potato-starch-physicochemical-properties
#4
Wei Zhang, Xinwei Liu, Qiaolan Wang, Haiqing Zhang, Mingfeng Li, Botao Song, Zhuqing Zhao
Potato starch serves as an excellent raw material or food additive in the food industry. With the advancement of the potato staple food strategy in China, improving the potato starch yield and quality has attracted more and more attention. Potassium is an essential nutrient for potato due to its direct effects on the yield and quality of potato tubers. Here, the effects of three different potassium levels on potato starch physicochemical properties were evaluated by field experiments. With increasing potassium application rates, the amylose content, phosphorus content and particle size decreased, thereby resulting in low gelatinization temperature, breakdown and setback viscosity, and high swelling power, relative crystallinity and transparency...
May 20, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29791829/burosumab-therapy-in-children-with-x-linked-hypophosphatemia
#5
Thomas O Carpenter, Michael P Whyte, Erik A Imel, Annemieke M Boot, Wolfgang Högler, Agnès Linglart, Raja Padidela, William Van't Hoff, Meng Mao, Chao-Yin Chen, Alison Skrinar, Emil Kakkis, Javier San Martin, Anthony A Portale
BACKGROUND: X-linked hypophosphatemia is characterized by increased secretion of fibroblast growth factor 23 (FGF-23), which leads to hypophosphatemia and consequently rickets, osteomalacia, and skeletal deformities. We investigated burosumab, a monoclonal antibody that targets FGF-23, in patients with X-linked hypophosphatemia. METHODS: In an open-label, phase 2 trial, we randomly assigned 52 children with X-linked hypophosphatemia, in a 1:1 ratio, to receive subcutaneous burosumab either every 2 weeks or every 4 weeks; the dose was adjusted to achieve a serum phosphorus level at the low end of the normal range...
May 24, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29791806/seasonal-dynamics-of-bacterioplankton-community-in-a-large-shallow-highly-dynamic-freshwater-lake
#6
Zhaoyu Kong, Wenbo Kou, Yantian Ma, Haotian Yu, Gang Ge, Lan Wu
The spatio-temporal shifts of bacterioplankton community can mirror their transition of functional traits in aquatic ecosystem. However, our understanding of spatio-temporal variation of bacterioplankton community composition structure (BCCs) within large, shallow and highly dynamic freshwater lake is still elusive. Here we examined the seasonal and spatial variability of BCCs in the Poyang Lake by 16S rRNA gene amplicon sequencing to explore how hydrological changes affect the BCCs. Principal coordinate analysis showed that the BCCs varied significantly among four sampling seasons, but not spatially...
May 23, 2018: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29791446/nitrogen-limitation-toxin-synthesis-potential-and-toxicity-of-cyanobacterial-populations-in-lake-okeechobee-and-the-st-lucie-river-estuary-florida-during-the-2016-state-of-emergency-event
#7
Benjamin J Kramer, Timothy W Davis, Kevin A Meyer, Barry H Rosen, Jennifer A Goleski, Gregory J Dick, Genesok Oh, Christopher J Gobler
Lake Okeechobee, FL, USA, has been subjected to intensifying cyanobacterial blooms that can spread to the adjacent St. Lucie River and Estuary via natural and anthropogenically-induced flooding events. In July 2016, a large, toxic cyanobacterial bloom occurred in Lake Okeechobee and throughout the St. Lucie River and Estuary, leading Florida to declare a state of emergency. This study reports on measurements and nutrient amendment experiments performed in this freshwater-estuarine ecosystem (salinity 0-25 PSU) during and after the bloom...
2018: PloS One
https://www.readbyqxmd.com/read/29791041/polymorphism-weak-interactions-and-phase-transitions-in-chalcogen-phosphorus-heterocycles
#8
Paula Sanz Camacho, Martin Stanford, David McKay, Daniel Dawson, Kasun Athukorala Arachchige, David Cordes, Alexandra Slawin, Derek Woollins, Sharon E Ashbrook
A series of novel P-E containing heterocycles with aromatic backbones were synthesised and characterized by single crystal and powder X-ray diffraction, microanalysis and mass spectrometry. 31P and 77Se solution- and solid-state NMR spectroscopy revealed significant differences between the NMR parameters in solution and in the solid state, related to conformational changes in the molecules. Many compounds were shown to exhibit a number of different polymorphic structures (identified by single-crystal XRD), although the bulk material studied by solid-state NMR often contained just one major polymorph...
May 23, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29790345/characterization-of-the-major-odor-active-compounds-in-dry-jujubes-cultivars-by-application-of-gas-chromatography-olfactometry-and-odor-activity-value
#9
Zuobing Xiao, Jiancai Zhu
The volatile compounds of jujube (Ziziphus jujube Mill.) puree obtained from three cultivars: 'jinsixiaozao' (Y1), 'youzao' (Y2), and 'yuzao' (Y3) were analyzed by gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry, GC-flame photometric detection, and nitrogen phosphorus detector. The results showed that a total of 37, 37, and 35 odor-active compounds were identified by GC-O in samples of Y1, Y2, and Y3, respectively. In addition, the odor activity value (OAV) was used to determine the important compounds...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29790329/controllable-synthesis-of-multi-heteroatoms-co-doped-hierarchical-porous-carbon-spheres-as-an-ideal-catalysis-platform
#10
Shuliang Yang, Yanan Zhu, Changyan Cao, Li Peng, Wendy L Queen, Weiguo Song
The synthesis of porous carbon spheres with hierarchical porous structures coupled with the doping of heteroatoms is particularly important for advanced applications. In this research, a new route for efficient and controllable synthesis of hierarchical porous carbon spheres co-doped with nitrogen, phosphorus, and sulfur (denoted as NPS-HPCs) was reported. This new approach combines in situ polymerization of hexachlorocyclophosphazene and 4, 4'-sulfonyldiphenol with the self-assembly of colloidal silica nanoparticles (SiO2 NPs)...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29790272/observation-of-a-metastable-p-heterocyclic-radical-by-muonium-addition-to-a-1-3-diphosphacyclobutane-2-4-diyl
#11
Shigekazu Ito, Yasuhiro Ueta, Kota Koshino, Kenji M Kojima, Iain McKenzie, Koichi Mikami
A 1,3-diphosphacyclobutane-2,4-diyl contains a unique unsaturated cyclic unit, and the presence of radical-type centres have been expected as a source of functionalities. This study demonstrates that the P-heterocyclic singlet biradical captures muonium (Mu = [µ+e-]) of the light isotope of hydrogen radical to generate an observable P-heterocyclic paramagnetic species. Investigation of a powder sample of 2,4-bis(2,4,6-tri-t-butylphenyl)-1-t-butyl-3-benzyl-1,3-diphosphacyclobutane-2,4-diyl by muon avoided level-crossing resonance (µLCR) spectroscopy revealed that muonium adds to the cyclic P2C2 unit...
May 22, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29790021/the-effect-of-cholecystectomy-on-25-hydroxyvitamin-d-levels-and-bone-mineral-density-in-postmenopausal-women
#12
Hatice Beyazal Polat, Munevver Serdaroglu Beyazal
Vitamin D deficiency has been reported in patients with gastrointestinal disorders. Little is known on the potentially deleterious effect of cholecystectomy on vitamin D levels and osteoporosis. We found that 25-hydroxyvitamin D levels and bone mineral density were lower in patients with prior cholecystectomy. PURPOSE: The influence of bile salts on vitamin D absorption is well-known, and increased incidence of vitamin D deficiency has been reported in patients with gastrointestinal disorders...
May 22, 2018: Archives of Osteoporosis
https://www.readbyqxmd.com/read/29789505/multilayer-black-phosphorus-near-infrared-photodetectors
#13
Chaojian Hou, Lijun Yang, Bo Li, Qihan Zhang, Yuefeng Li, Qiuyang Yue, Yang Wang, Zhan Yang, Lixin Dong
Black phosphorus (BP), owing to its distinguished properties, has become one of the most competitive candidates for photodetectors. However, there has been little attention paid on photo-response performance of multilayer BP nanoflakes with large layer thickness. In fact, multilayer BP nanoflakes with large layer thickness have greater potential from the fabrication viewpoint as well as due to the physical properties than single or few layer ones. In this report, the thickness-dependence of the intrinsic property of BP photodetectors in the dark was initially investigated...
May 23, 2018: Sensors
https://www.readbyqxmd.com/read/29789473/effect-of-sewage-irrigation-on-the-ct-measured-soil-pore-characteristics-of-a-clay-farmland-in-northern-china
#14
Xiaoming Guo, Tongqian Zhao, Lin Liu, Chunyan Xiao, Yuxiao He
Sewage irrigation has a strong influence on the physical, chemical, and biological properties of soil. However, the effects of sewage irrigation on the pore characteristics of soil are not well understood. This study compares the effects of sewage irrigation and groundwater irrigation on computed tomography (CT)-measured pore parameters and examines the relationships between CT-measured pore parameters and soil physicochemical and microbial properties. Intact soil cores were collected from S1 irrigated with sewage for 25 years, S2 irrigated with sewage for 52 years, and CK irrigated with groundwater...
May 22, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29789042/phytoplankton-functional-groups-variation-and-influencing-factors-in-a-shallow-temperate-lake
#15
Chang Tian, Daping Hao, Haiyan Pei, Martina A Doblin, Ying Ren, Jielin Wei, Yawei Feng
  The present study was carried out in Luoma Lake, a shallow lake in temperate eastern China. Based on a two-year study, the dynamics of phytoplankton functional groups and influencing factors were analyzed. A total of 178 taxa were identified and sorted into 20 codons, according to the phytoplankton functional group classification. In order to find the environmental factors driving phytoplankton variations, fifteen groups were analyzed in detail using redundancy analysis. Groups P (Fragilaria crotonensis), X2 (Chlamydomonas globosa, C...
June 1, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/29788199/influences-of-trace-mineral-nutrition-and-maternal-flock-age-on-broiler-embryo-bone-development
#16
C A Torres, D R Korver
At hatch, the chick skeleton is a miniature of that of the adult bird. The hen deposits calcium, phosphorus, and trace minerals (copper, zinc, and manganese) along with vitamin D into the egg to allow development of the embryonic skeleton. The main source of calcium is the eggshell, whereas phosphorus, trace minerals, and vitamin D are mainly derived from the yolk. Calcium is absorbed from the eggshell and transferred to the embryo and yolk through the chorioallantoic membrane, whereas phosphorus and trace minerals are simultaneously mobilized by the yolk sac membrane...
May 21, 2018: Poultry Science
https://www.readbyqxmd.com/read/29788117/are-we-ready-to-improve-phosphorus-homeostasis-in-rice
#17
Stanislav Kopriva, Chengcai Chu
Phosphorus (P) is an essential macronutrient which often limits plant growth, but the phosphate rock used for fertilizer production is a finite resource. On the other hand, large amounts of P compounds are entering surface waters, leading to eutrophication. Therefore, improvement of phosphate use efficiency of crop plants is a major task for plant science. Rice as a staple crop has recently been a focus of such efforts with several major discoveries. New transporters controlling phosphate homeostasis in rice have been discovered...
May 17, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29786936/a-general-synthesis-of-phosphorus-and-arsenic-containing-analogues-of-the-thio-and-seleno-cyanate-anions
#18
Frank Tambornino, Alexander Hinz, Ralf Köppe, Jose Manuel Goicoechea
A general synthetic protocol for the synthesis of phosphorus- and arsenic-containing analogues of the thio- and seleno-cyanate anions is reported. This procedure allows for the isolation of three unprecedented species: the phosphaethynselenolate, PCSe- (1), the arsaethynthiolate, AsCS- (2), and the arsaethynselenolate, AsCSe- (3), anions. The structures, electronic properties, and spectroscopic signatures of these species are reported.
May 22, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29786504/transgenic-pigs-to-the-rescue
#19
Björn Petersen
Genetically engineered pigs that digest their food better could help to reduce phosphorus and nitrogen pollution.
May 22, 2018: ELife
https://www.readbyqxmd.com/read/29785759/effect-of-2-94-%C3%A2%C2%B5m-er-yag-laser-on-the-chemical-composition-of-hard-tissues
#20
Abtesam Aljdaimi, Hugh Devlin, Mark Dickinson, Abdullatif Alfutimie
The aim was to investigate the effect of the Er-YAG laser radiation on morphology and chemical composition of enamel, dentin, and bone. The specimens of the three groups were irradiated with a very long pulse mode (VLP) of 2.94 µm Er-YAG laser with 100 mJ pulse energy and energy density of 8.42 J/ cm2 for 30 s, at a repetition rate of 15 Hz. The organic and inorganic content of the samples were investigated by Fourier Transforms Infrared spectroscopy (FTIR). The morphological characteristics were investigated with scanning electron microscopy (SEM) and elemental analysis (calcium and phosphorus) with energy-dispersive X-ray spectroscopy (EDX)...
May 21, 2018: Microscopy Research and Technique
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