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Phosphorus

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https://www.readbyqxmd.com/read/28098962/gold-catalyzed-suzuki-coupling-of-ortho-substituted-hindered-aryl-substrates
#1
Nejib Dwadnia, Julien Roger, Nadine Pirio, Hélène Cattey, Ridha Ben Salem, Jean-Cyrille Hierso
A method that allows hindered ortho-substituted aryl iodides to be efficiently coupled to phenylboronic acid using a gold-catalyzed C-C bond formation is presented. The use of a molecularly-defined dinuclear gold chloride catalytic precursor that is stabilized by a new tetradentate (N,N')-diamino-(P,P')-diphosphino ferrocene hybrid ligand in a Suzuki-type reaction is described for the first time. Electron-rich isopropyl groups on phosphorus were found essential for a superior activity, while the performances of a set of analogous gold dinuclear complexes that were fully characterized by multinuclear NMR spectroscopy and XRD analysis, were investigated...
January 18, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28098948/phosphorus-acquisition-efficiency-in-arbuscular-mycorrhizal-maize-is-correlated-with-the-abundance-of-root-external-hyphae-and-the-accumulation-of-transcripts-encoding-pht1-phosphate-transporters
#2
Ruairidh J H Sawers, Simon F Svane, Clement Quan, Mette Grønlund, Barbara Wozniak, Mesfin-Nigussie Gebreselassie, Eliécer González-Muñoz, Ricardo A Chávez Montes, Ivan Baxter, Jerome Goudet, Iver Jakobsen, Uta Paszkowski
Plant interactions with arbuscular mycorrhizal fungi have long attracted interest for their potential to promote more efficient use of mineral resources in agriculture. Their use, however, remains limited by a lack of understanding of the processes that determine the outcome of the symbiosis. In this study, the impact of host genotype on growth response to mycorrhizal inoculation was investigated in a panel of diverse maize lines. A panel of 30 maize lines was evaluated with and without inoculation with arbuscular mycorrhizal fungi...
January 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28098279/eu-3-doped-y3-xndxal3o12-garnet-synthesis-and-structural-investigation
#3
L Pavasaryte, A Katelnikovas, V Klimavicius, V Balevicius, A Krajnc, G Mali, J Plavec, A Kareiva
Nd(3+)-Doped yttrium aluminium garnet and Eu(3+)-Nd(3+)-co-doped yttrium aluminium garnet were synthesized using an environmentally friendly sol-gel method at low temperatures. The results of X-ray diffraction (XRD) analysis of the powders sintered at 1000 °C showed the purity and formation of monophasic compounds. The phase composition and purity confirmation of the samples were also characterized via FTIR spectroscopy. Desirable microstructural features and particle size of phosphorous materials of the polycrystalline samples were studied via scanning electron microscopy (SEM)...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28098099/the-evaluation-of-the-relationship-between-serum-levels-of-interleukin-6-and-interleukin-10-and-metabolic-acidosis-in-hemodialysis-patients
#4
Narges Sadat Zahed, Saghar Chehrazi
Chronic kidney disease is defined as progressive kidney dysfunction. The levels of various cytokines increase in hemodialysis (HD) patients. High levels of interleukins (ILs) and presence of metabolic acidosis are described as independent risk factors for morbidity and mortality in these patients. This study was designed to evaluate the relationship between IL-6 and IL-10 and serum bicarbonate and metabolic acidosis in HD patients. In this analytical crosssectional study, patients referred to the HD units of Loghman Hakim and Shahid Ashrafi Esfahani Hospitals were randomly selected...
January 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28097775/breaking-the-tetra-coordinated-framework-rule-new-clathrate-ba8-m24-p28-%C3%AE-m-cu-zn
#5
Juli-Anna Dolyniuk, Julia V Zaikina, Derrick C Kaseman, Sabyasachi Sen, Kirill Kovnir
A new clathrate type has been discovered in the Ba/Cu/Zn/P system. The crystal structure of the Ba8 M24 P28+δ (M=Cu/Zn) clathrate is composed of the pentagonal dodecahedra common to clathrates along with a unique 22-vertex polyhedron with two hexagonal faces capped by additional partially occupied phosphorus sites. This is the first example of a clathrate compound where the framework atoms are not in tetrahedral or trigonal-pyramidal coordination. In Ba8 M24 P28+δ a majority of the framework atoms are five- and six-coordinated, a feature more common to electron-rich intermetallics...
January 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28096608/effect-of-aegle-marmelos-and-murraya-koenigii-in-treatment-of-delayed-pubertal-buffaloes-heifers
#6
Mohan M Baitule, A P Gawande, Umesh Kumar, S K Sahatpure, Manoj S Patil, Mansi M Baitule
AIM: This study aims to study the estrus induction, ovulation, and conception rate of delayed puberty in buffaloes heifers by feeding a herbal plants Aegle marmelos (bael/bili/bhel leaf) and Murraya koenigii (Curry leaf). MATERIALS AND METHODS: Totally, 24 buffalo heifers with delayed puberty were selected for the present study and divided randomly in four equal groups (n=6). Before experiment, all animals were dewormed with albendazole at 10 mg/kg body weight to prevent them from the stress of parasitism...
December 2016: Veterinary World
https://www.readbyqxmd.com/read/28095842/cactus-opuntia-humifusa-water-extract-ameliorates-loperamide-induced-constipation-in-rats
#7
Sung Hee Han, Kyungmi Park, Eun Young Kim, So Hyun Ahn, Hyun-Sun Lee, Hyung Joo Suh
BACKGROUND: Korean cactus Cheonnyuncho (Opuntia humifusa) is rich in pectin, phenols, flavonoids, and minerals such as calcium and phosphorus. Some Koreans drink Cheonnyuncho juice prepared by grinding Cheonnyuncho with water. Cheonnyuncho is well known for its functional properties and antioxidant effects, but its effect on constipation has not been sufficiently studied. METHODS: Loperamide (2 mg/kg) was injected subcutaneously to induce constipation in rats. The animals were divided into four groups: a normal group (NOR), constipation control group (CON), and two constipation groups receiving the Cheonnyuncho extract (CE) at two different concentrations in drinking water, 3% (L-CE group) and 6% (H-CE group), for 25 days...
January 17, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28095739/expression-and-localization-of-fibroblast-growth-factor-fgf-23-and-klotho-in-the-spleen-its-physiological-and-functional-implications
#8
Yuri Nakashima, Toru Mima, Mitsuru Yashiro, Tomohiro Sonou, Masaki Ohya, Asuka Masumoto, Shintaro Yamanaka, Daisuke Koreeda, Koichi Tatsuta, Yoshiyuki Hanba, Mari Moribata, Shigeo Negi, Takashi Shigematsu
The FGF23-Klotho signaling axis is known to exert anti-aging effects via calcium-phosphorus metabolism. In mice deficient in FGF23-Klotho signaling, however, the number of splenocytes is reduced. FGF23 is expressed in both bone and spleen, with regulation of its production differing in these organs. As FGF23-Klotho signaling may play an immunological role in the spleen, splenocytes in male C57BL/6J mice were assayed for expression of Klotho or FGF23 by flow cytometry and immunohistochemistry. Cells that expressed Klotho included CD45R/B220(+) CD21/CD35(+) CD1d(+) CD43(-) marginal zone B cells...
January 18, 2017: Growth Factors
https://www.readbyqxmd.com/read/28095182/effect-of-intermittent-aeration-on-microbial-diversity-in-an-intermittently-aerated-ifas-reactor-treating-municipal-wastewater-a-field-study
#9
Akansha Bhatia, Nitin Kumar Singh, Timsi Bhando, Ranjana Pathania, Absar Ahmad Kazmi
In the present study, the effect of three intermittent aeration (IA) cycles on treatment performance and microbial diversity was investigated in an integrated fixed film activated sludge (IFAS) reactor treating municipal wastewater. The results showed that IA strategies were able to achieve efficient removal of organics and nitrogen ranging between 90 and 95% and 70 and 80%, respectively, however the phosphorus removal was found to be inversely proportional to the duration of aeration off time in each IA cycle...
January 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28094308/silicon-availability-modifies-nutrient-use-efficiency-and-content-c-n-p-stoichiometry-and-productivity-of-winter-wheat-triticum-aestivum-l
#10
Silke Neu, Jörg Schaller, E Gert Dudel
Silicon (Si) is known as beneficial element for graminaceous plants. The importance of Si for plant functioning of cereals was recently emphasized. However, about the effect of Si availability on biomass production, grain yield, nutrient status and nutrient use efficiency for wheat (Triticum aestivum L.), as one of the most important crop plants worldwide, less is known so far. Consequently, we assessed the effect of a broad range of supply levels of amorphous SiO2 on wheat plant performance. Our results revealed that Si is readily taken up and accumulated basically in aboveground vegetative organs...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28093674/prospect-of-recovering-phosphorus-in-magnesium-slag-packed-wetland-filter
#11
Xianqiang Tang, Min Wu, Rui Li, Zhenhua Wang
Phosphorus recovery from wastewater not only reduces the unbearable impacts of excessive nutrient discharge on environmental systems but also favor the reuse of phosphorus resource. Based on the mechanism as well as technical analysis for major phosphorus recovery techniques including struvite precipitation and wetland substrate adsorption, a novel magnesium slag-packed wetland filter and corresponding operational procedures are proposed, which aim to reduce the dependence of using magnesium-containing chemical reagent as magnesium sources for struvite precipitation, and improve the accumulation and recovery performance for struvite precipitation within porous wetland substrate...
January 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28093671/evaluation-of-laboratory-scale-in-situ-capping-sediments-with-purple-parent-rock-to-control-the-eutrophication
#12
Xuejiao Huang, Wenhao Shi, Jiupai Ni, Zhenlun Li
In this study, the effectiveness of controlling the eutrophication using purple parent rock to cap the sediments was evaluated in the laboratory scale. Sediments were collected from Sanxikou reservoir (China) in July 2013. Then, three types of purple parent rock (T1f, J3p, and J2s) which are distributed widely in southwest China were used to cap the sediments. Limestone and calcite were used as the contrast group, because they had been reported as effective controls on eutrophication. Then, they were incubated at 20 °C for 46 days...
January 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28092021/sunshine-vitamin-and-thyroid
#13
REVIEW
Immacolata Cristina Nettore, Luigi Albano, Paola Ungaro, Annamaria Colao, Paolo Emidio Macchia
Vitamin D exerts its canonical roles on the musculoskeletal system and in the calcium/phosphorus homeostasis. In the last years, increasing evidences suggested several extra-skeletal actions of this hormone, indicating that vitamin D may produce effects in almost all the body tissues. These are mediated by the presence of vitamin D receptor (VDR) and thanks to the presence of the 1-α-hydroxylase, the protein that converts the 25-hydroxyvitamin (calcidiol) to the active form 1,25-dihydroxyvitamin (calcitriol)...
January 14, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28091992/analysing-the-correlations-of-long-term-seasonal-water-quality-parameters-suspended-solids-and-total-dissolved-solids-in-a-shallow-reservoir-with-meteorological-factors
#14
Chen Zhang, Wenna Zhang, Yixuan Huang, Xueping Gao
To explore the correlations among water quality parameters, suspended solids (SS) and total dissolved solids (TDS) with meteorological factors in a shallow reservoir in China, the long-term variations of water quality were considered. A non-parametric regression method, generalized additive models (GAM), was used to analyse the correlations among eleven physicochemical and biological parameters as well as three meteorological factors (wind speed, rainfall and solar radiation) which we collected from 2000 to 2011...
January 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28091988/genotoxicity-and-cytotoxicity-reduction-of-the-polluted-urban-river-after-ecological-restoration-a-field-scale-study-of-jialu-river-in-northern-china
#15
Jie Sun, Rui Zhang, Long Qin, Haixiao Zhu, Yu Huang, Yingang Xue, Shuqing An, Xianchuan Xie, Aimin Li
To further treat the reclaimed municipal wastewater and rehabilitate the aquatic ecosystem of polluted urban rivers, an 18.5-km field-scale ecological restoration project was constructed along Jialu River, a polluted urban river which receives only reclaimed municipal wastewater from Zhengzhou City without natural upland water dilution. This study investigated the potential efficiency of water quality improvement, as well as genotoxicity and cytotoxicity reduction along the ecological restoration project of this polluted urban river...
January 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28091792/restoration-using-azolla-imbricata-increases-nitrogen-functional-bacterial-groups-and-genes-in-soil
#16
Xiao-Ming Lu, Peng-Zhen Lu, Ke Yang
Microbial groups are major factors that influence soil function. Currently, there is a lack of studies on microbial functional groups. Although soil microorganisms play an important role in the nitrogen cycle, systematic studies of the effects of environmental factors on microbial populations in relation to key metabolic processes in the nitrogen cycle are seldom reported. In this study, we conducted a systematic analysis of the changes in nitrogen functional groups in mandarin orange garden soil treated with Azolla imbricata...
January 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28091752/management-of-secondary-hyperparathyroidism-practice-patterns-and-outcomes-of-cinacalcet-treatment-with-or-without-active-vitamin%C3%A2-d-in-austria-and-switzerland-the-observational-transit-study
#17
Wolfgang Pronai, Alexander R Rosenkranz, Andreas Bock, Renate Klauser-Braun, Christine Jäger, Gunther Pendl, Margit Hemetsberger, Karl Lhotta
Secondary hyperparathyroidism is a complex disorder requiring an individualized multicomponent treatment approach. This study was conducted to identify treatment combinations used in clinical practice in Austria and Switzerland and the potential to control this disorder. A total of 333 adult hemodialysis and peritoneal dialysis patients were analyzed. All patients received conventional care prior to initiation of a cinacalcet-based regimen. During the study, treatment components, e.g. cinacalcet, active vitamin D analogues and phosphate binders, were adapted to individual patient requirements and treatment dynamics were documented...
January 13, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28091750/ectomycorrhizal-fungal-diversity-associated-with-endemic-tristaniopsis-spp-myrtaceae-in-ultramafic-and-volcano-sedimentary-soils-in-new-caledonia
#18
Muhammad Waseem, Marc Ducousso, Yves Prin, Odile Domergue, Laure Hannibal, Clarisse Majorel, Philippe Jourand, Antoine Galiana
New Caledonian serpentine (ultramafic) soils contain high levels of toxic heavy metals, in particular nickel, (up to 20 g kg(-1)) and are deficient in essential elements like carbon, nitrogen and phosphorus while having a high magnesium/calcium ratio. Although previous studies showed that ectomycorrhizal symbioses could play an important role in the adaptation of the endemic plants to ultramafic soils (FEMS Microbiol Ecol 72:238-49, 2010), none of them have compared the diversity of microbial communities from ultramafic vs non-ultramafic soils in New Caledonia...
January 13, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28091741/chemical-physical-and-biological-factors-shape-littoral-invertebrate-community-structure-in-coal-mining-end-pit-lakes
#19
Andreas Luek, Joseph B Rasmussen
Aquatic invertebrates form the base of the consumer food web in lakes. In coal-mining end-pit lakes, invertebrates are exposed to an environment with potentially challenging physical and chemical features. We hypothesized that the physical and chemical features of end-pit lakes reduce critical littoral habitat and thus reduce invertebrate diversity, thereby limiting the potential for these lakes to be naturalized. We used a multivariate approach using principle component analysis and redundancy analysis to study relationships between invertebrate community structure, habitat features, and water quality in five end-pit lakes and five natural lakes in the Rocky Mountain foothills of west-central Alberta, Canada...
January 13, 2017: Environmental Management
https://www.readbyqxmd.com/read/28091740/controlling-eutrophication-in-a-mediterranean-shallow-reservoir-by-phosphorus-loading-reduction-the-need-for-an-integrated-management-approach
#20
Mikel Zaragüeta, Pablo Acebes
Increased nutrient enrichment in Mediterranean standing waters has enhanced the risk of being affected by cyanobacterial blooms. Because phosphorus abatement is shaped as a crucial strategy for controlling eutrophication, this study introduces a structural thinking, experiential learning laboratory with animation dynamic model elaborated for Cazalegas Reservoir (Spain) to assess the feasibility of implementing a set of internal and external control measures and hydromorphological adjustments to meet the goal of oligotrophication...
January 13, 2017: Environmental Management
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