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Phosphorus

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https://www.readbyqxmd.com/read/28645710/impact-of-upstream-river-inputs-and-reservoir-operation-on-phosphorus-fractions-in-water-particulate-phases-in-the-three-gorges-reservoir
#1
Chaonan Han, Binghui Zheng, Yanwen Qin, Yingqun Ma, Chenchen Yang, Zhichao Liu, Wei Cao, Minghui Chi
The impoundment of the Three Gorges Reservoir (TGR) has changed water-sand transport regime, with inevitable effects on phosphorus transport behavior in the TGR. In this study, we measured phosphorus fractions in water and suspended particles transported from upstream rivers of the TGR (the Yangtze River, the Jialing River and the Wu River) to reservoir inner region over the full operation schedule of the TGR. The aim was to determine how phosphorus fractions in water and particulate phases varied in response to natural hydrological processes and reservoir operations...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28645709/aquatic-biodiversity-in-sedimentation-ponds-receiving-road-runoff-what-are-the-key-drivers
#2
Zhenhua Sun, John E Brittain, Ekaterina Sokolova, Helene Thygesen, Svein Jakob Saltveit, Sebastien Rauch, Sondre Meland
Recently, increased attention has been paid to biodiversity conservation provided by blue-green solutions such as engineered ponds that are primarily established for water treatment and flood control. However, little research has been done to analyse the factors that affect biodiversity in such ponds. The purpose of this study was to evaluate the influence of environmental factors on aquatic biodiversity, mainly macroinvertebrate communities, in road sedimentation ponds in order to provide a foundation for recommendations on aquatic biodiversity conservation...
June 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28645705/acid-load-and-phosphorus-homeostasis-in-ckd
#3
Pascale Khairallah, Tamara Isakova, John Asplin, Lee Hamm, Mirela Dobre, Mahboob Rahman, Kumar Sharma, Mary Leonard, Edgar Miller, Bernard Jaar, Carolyn Brecklin, Wei Yang, Xue Wang, Harold Feldman, Myles Wolf, Julia J Scialla
BACKGROUND: The kidneys maintain acid-base homeostasis through excretion of acid as either ammonium or as titratable acids that primarily use phosphate as a buffer. In chronic kidney disease (CKD), ammoniagenesis is impaired, promoting metabolic acidosis. Metabolic acidosis stimulates phosphaturic hormones, parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF-23) in vitro, possibly to increase urine titratable acid buffers, but this has not been confirmed in humans. We hypothesized that higher acid load and acidosis would associate with altered phosphorus homeostasis, including higher urinary phosphorus excretion and serum PTH and FGF-23...
June 21, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28645701/effect-of-phosphate-solubilizing-bacteria-on-phosphorus-dynamics-and-the-bacterial-community-during-composting-of-sugarcane-industry-waste
#4
German A Estrada-Bonilla, Cintia M Lopes, Ademir Durrer, Paulo R L Alves, Nicolle Passaglia, Elke J B N Cardoso
Sugarcane processing generates a large quantity of residues, such as filter cake and ashes, which are sometimes composted prior to their amendment in soil. However, important issues still have to be addressed on this subject, such as the description of bacterial succession that occurs throughout the composting process and the possibilities of using phosphate-solubilizing bacteria (PSB) during the process to improve phosphorus (P) availability in the compost end product. Consequently, this study evaluated the bacterial diversity and P dynamics during the composting process when inoculated with Pseudomonas aeruginosa PSBR12 and Bacillus sp...
June 7, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28645648/promotion-of-iron-nutrition-and-growth-on-peanut-by-paenibacillus-illinoisensis-and-bacillus-sp-strains-in-calcareous-soil
#5
Di Liu, Qianqian Yang, Ke Ge, Xiuna Hu, Guozhen Qi, Binghai Du, Kai Liu, Yanqin Ding
This study aimed to explore the effects of two siderophore-producing bacterial strains on iron absorption and plant growth of peanut in calcareous soil. Two siderophore-producing bacterial strains, namely, YZ29 and DZ13, isolated from the rhizosphere soil of peanut, were identified as Paenibacillus illinoisensis and Bacillus sp., respectively. In potted experiments, YZ29 and DZ13 enhanced root activity, chlorophyll and active iron content in leaves, total nitrogen, phosphorus and potassium accumulation of plants and increased the quality of peanut kernels and plant biomass over control...
June 4, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28645066/hydrothermal-co-carbonization-of-sewage-sludge-and-pinewood-sawdust-for-nutrient-rich-hydrochar-production-synergistic-effects-and-products-characterization
#6
Xiaojuan Zhang, Lei Zhang, Aimin Li
The aim of this study is to explore the synergistic effects of hydrothermal co-carbonization of sewage sludge and pinewood sawdust on hydrochar production. Firstly, the effects of mixing ratios on hydrothermal carbonization were investigated, and then, the hydrochar was characterized by diverse analytical techniques. The mass balance results indicated that a significant synergistic enhancement occurred in terms of the increased hydrochar yield, organic and carbon retentions. By combining sewage sludge and pinewood sawdust at the mass ratio of 1:1, 58...
June 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28644492/electronic-properties-of-blue-phosphorene-graphene-and-blue-phosphorene-graphene-like-gallium-nitride-heterostructures
#7
Minglei Sun, Jyh-Pin Chou, Jin Yu, Wencheng Tang
Blue phosphorene (BlueP) is a graphene-like phosphorus nanosheet which was synthesized very recently for the first time [Nano Lett., 2016, 16, 4903-4908]. The combination of electronic properties of two different two-dimensional materials in an ultrathin van der Waals (vdW) vertical heterostructure has been proved to be an effective approach to the design of novel electronic and optoelectronic devices. Therefore, we used density functional theory to investigate the structural and electronic properties of two BlueP-based heterostructures - BlueP/graphene (BlueP/G) and BlueP/graphene-like gallium nitride (BlueP/g-GaN)...
June 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28643486/comparison-of-intact-pth-and-bio-intact-pth-assays-among-non-dialysis-dependent-chronic-kidney-disease-patients
#8
Yael Einbinder, Sydney Benchetrit, Eliezer Golan, Tali Zitman-Gal
BACKGROUND: The third-generation bio-intact parathyroid hormone (PTH) (1-84) assay was designed to overcome problems associated with the detection of C-terminal fragments by the second-generation intact PTH assay. The two assays have been compared primarily among dialysis populations. The present study evaluated the correlations and differences between these two PTH assays among patients with chronic kidney disease (CKD) stages 3 to 5 not yet on dialysis. METHODS: Blood samples were collected from 98 patients with CKD stages 3 to 5...
September 2017: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/28642625/testing-the-environmental-filtering-concept-in-global-drylands
#9
Yoann Le Bagousse-Pinguet, Nicolas Gross, Fernando T Maestre, Vincent Maire, Francesco de Bello, Carlos Roberto Fonseca, Jens Kattge, Enrique Valencia, Jan Leps, Pierre Liancourt
1. The environmental filtering hypothesis predicts that the abiotic environment selects species with similar trait values within communities. Testing this hypothesis along multiple - and interacting - gradients of climate and soil variables constitutes a great opportunity to better understand and predict the responses of plant communities to ongoing environmental changes. 2. Based on two key plant traits, maximum plant height and specific leaf area (SLA), we assessed the filtering effects of climate (mean annual temperature and precipitation, precipitation seasonality), soil characteristics (soil pH, sand content and total phosphorus) and all potential interactions on the functional structure and diversity of 124 dryland communities spread over the globe...
July 2017: Journal of Ecology
https://www.readbyqxmd.com/read/28641229/effects-of-short-term-invasion-of-spartina-alterniflora-and-the-subsequent-restoration-of-native-mangroves-on-the-soil-organic-carbon-nitrogen-and-phosphorus-stock
#10
Jianxiang Feng, Jian Zhou, Liming Wang, Xiaowei Cui, Cunxin Ning, Hao Wu, Xiaoshan Zhu, Guanghui Lin
The exotic cordgrass Spartina alterniflora has severely invaded the mangrove wetlands in southern China and ecological restoration using native mangroves was conducted in an attempt to control this invasive species. In this study, the contents and pools of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) were quantified to investigate the invasive effects of S. alterniflora and then to evaluate whether the ecological restoration of native mangrove could reverse those effects. S. alterniflora only showed significantly higher organic carbon content in the surface 0-10 cm of soil than in the uninvaded mudflat...
June 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28641088/application-of-zeolite-hydrous-zirconia-composite-as-a-novel-sediment-capping-material-to-immobilize-phosphorus
#11
Yi Fan, Yiwen Li, Deyi Wu, Chunjie Li, Hainan Kong
A unique sediment-capping agent consisting of a zeolite/hydrous zirconia composite (ZHZ) was developed and tested for P-immobilization in the overlying water and sediment cores from a freshwater pond. In the ZHZ, NaP1 zeolite was covered with hydrous zirconia, which existed as an amorphous phase. Experimental results in pond water indicated that ZHZ could efficiently remove soluble reactive phosphorus. The 28-day sediment incubation experiments showed that capping sediment with ZHZ resulted in a more efficient, rapid and sustained decrease in P concentration when compared with the traditional alum treatment method...
June 12, 2017: Water Research
https://www.readbyqxmd.com/read/28640994/promotion-of-electrocatalytic-hydrogen-evolution-reaction-on-nitrogen-doped-carbon-nanosheets-with-secondary-heteroatoms
#12
Konggang Qu, Yao Zheng, Xianxi Zhang, Ken Davey, Sheng Dai, Shi Zhang Qiao
Dual heteroatom-doped carbon materials are efficient electrocatalysts via a synergistic effect. With nitrogen as the primary dopant, boron, sulfur and phosphorus can be used as secondary elements for co-doped carbons. However, evaluation and analysis of the promotional effect of B, P and S to N-doped carbons has not been widely researched. Here we report a robust platform that is constructed through polydopamine (PDA) to prepare N, B-, N, P- and N, S-co-doped carbon nanosheets, characterized by similar N species content and efficient B, P and S doping...
June 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28640986/antimonene-quantum-dots-synthesis-and-application-as-near-infrared-photothermal-agents-for-effective-cancer-therapy
#13
Wei Tao, Xiaoyuan Ji, Xiaoding Xu, Mohammad Ariful Islam, Zhongjun Li, Si Chen, Phei Er Saw, Han Zhang, Zameer Bharwani, Zilei Guo, Jinjun Shi, Omid Farokhzad
Photothermal therapy (PTT) has shown significant potential for cancer therapy. However, developing nanomaterials (NMs)-based photothermal agents (PTAs) with satisfactory photothermal conversion efficacy (PTCE) and biocompatibility remains a key challenge. Herein, a new generation of PTAs based on two-dimensional (2D) antimonene quantum dots (AMQDs) was developed by a novel liquid exfoliation method. Surface modification of AMQDs with polyethylene glycol (PEG) significantly enhanced both biocompatibility and stability in physiological medium...
June 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28640614/role-of-polymeric-coating-on-the-phosphate-availability-as-fertilizer-insight-from-phosphate-release-in-soil-castor-polyurethane-coatings
#14
Diego Cruz, Ricardo Bortoletto-Santos, Gelton Guimarães, Wagner Luiz Polito, Caue Ribeiro
The coating of fertilizers with polymers is an acknowledged strategy for controlling the release of nutrients and their availability in soil. However, its effectiveness in the case of soluble phosphate fertilizers is still uncertain, and information is lacking concerning the chemical properties and structures of such coatings. Here, an oil-based hydrophobic polymer system (polyurethane) is proposed for control of the release of phosphorus from diammonium phosphate (DAP) granules. This material was systematically characterized, with evaluation of the delivery mechanism and the availability of phosphate in an acid soil...
June 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28640388/electrostatic-driven-exfoliation-and-hybridization-of-2d-nanomaterials
#15
Guijian Guan, Jing Xia, Shuhua Liu, Yuan Cheng, Shiqiang Bai, Si Yin Tee, Yong-Wei Zhang, Ming-Yong Han
Here, direct and effective electrostatic-driven exfoliation of tungsten trioxide (WO3 ) powder into atomically thin WO3 nanosheets is demonstrated for the first time. Experimental evidence together with theoretical simulations clearly reveal that the strong binding of bovine serum albumin (BSA) on the surface of WO3 via the protonation of NH2 groups in acidic conditions leads to the effective exfoliation of WO3 nanosheets under sonication. The exfoliated WO3 nanosheets have a greatly improved dispersity and stability due to surface-protective function of BSA, and exhibit a better performance and unique advantages in applications such as visible-light-driven photocatalysis, high-capacity adsorption, and fast electrochromics...
June 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28640314/theory-of-2d-crystals-graphene-and-beyond
#16
Rafael Roldán, Luca Chirolli, Elsa Prada, Jose Angel Silva-Guillén, Pablo San-Jose, Francisco Guinea
This tutorial review presents an overview of the basic theoretical aspects of two-dimensional (2D) crystals. We revise essential aspects of graphene and the new families of semiconducting 2D materials, like transition metal dichalcogenides or black phosphorus. Minimal theoretical models for various materials are presented. Some of the exciting new possibilities offered by 2D crystals are discussed, such as manipulation and control of quantum degrees of freedom (spin and pseudospin), confinement of excitons, control of the electronic and optical properties with strain engineering, or unconventional superconducting phases...
June 22, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28639850/field-scale-electrolysis-ceramic-membrane-system-for-the-treatment-of-sewage-from-decentralized-small-communities
#17
Dong-Jin Son, Woo-Yeol Kim, Chan-Young Yun, Dae-Gun Kim, Duk Chang, Young Sunwoo, Ki-Ho Hong
The electrolysis process using copper electrodes combined with ceramic membrane with pore sizes of 0.1 to 0.2μm as a system for the treatment of sewage from decentralized small communities. The system was operated under an HRT of 0.1 hour, voltage of 24V, and TMP of 0.05MPa. The system showed average removals of organics, nitrogen, phosphorus, and solids of up to 80%, 52%, 92%, and 100%, respectively. Removal of organics and nitrogen dramatically increased in proportion to increment of influent loading. Phosphorus and solids were remarkably eliminated by both electro-coagulation and membrane filtration...
June 22, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28639789/anti-inflammatory-effect-of-anti-tnf-%C3%AE-cationic-phosphorous-dendrimers-nanocomplexes-administered-intranasally-in-a-murine-acute-lung-injury-model
#18
Adam Bohr, Nicolas Tsapis, Ilaria Andreana, Anais Chamarat, Camilla Foged, Claudine Delomenie, Magali Noiray, Nabil El Brahmi, Jean Pierre Majoral, Serge Mignani, Elias Fattal
Inflammation is an essential component of many lung diseases, including asthma, chronic obstructive pulmonary disease (COPD) or acute lung injury. Our purpose was to design efficient carriers for lung delivery of small interfering RNA (siRNA) targeting tumor necrosis factor (TNF-α) in an acute lung injury model. To achieve this goal, two different types of phosphorus-based dendrimers with either pyrrolidinium or morpholinium as terminal protonated amino groups were selected for their better biocompatibility compared to other dendrimers...
June 22, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28639406/controlling-cyanobacterial-harmful-blooms-in-freshwater-ecosystems
#19
Hans W Paerl
Cyanobacteria's long evolutionary history has enabled them to adapt to geochemical and climatic changes, and more recent human and climatic modifications of aquatic ecosystems, including nutrient over-enrichment, hydrologic modifications, and global warming. Harmful (toxic, hypoxia-generating, food web altering) cyanobacterial bloom (CyanoHAB) genera are controlled by the synergistic effects of nutrient (nitrogen and phosphorus) supplies, light, temperature, water residence/flushing times, and biotic interactions...
June 21, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28639023/uncertainties-in-vegetated-buffer-strip-function-in-controlling-phosphorus-export-from-agricultural-land-in-the-canadian-prairies
#20
Reza Habibiandehkordi, David A Lobb, Steve C Sheppard, Don N Flaten, Philip N Owens
Vegetated buffer strips (VBSs) are widely encouraged as a cost-effective strategy to address phosphorus (P) pollution associated with agricultural production. However, there is a lack of evidence in the effectiveness of these measures for tackling diffuse P pollution in cold-climate regions under concentrated runoff flow conditions. This research aimed to investigate the effects of VBSs on reducing P concentrations in surface runoff at three different watersheds in Manitoba, Canada. Surface runoff samples were collected in four sub-catchments from each watershed by installing paired weirs at 0...
June 22, 2017: Environmental Science and Pollution Research International
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