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1. Research progress and application prospect of anaerobic biological phosphorus removal

Author:
Yang, Fengxia; Zhang, Chaosheng; Rong, Hongwei; Cao, Yongfeng
Source:
Applied microbiology and biotechnology 2019 v.103 no.5 pp. 2133-2139
ISSN:
0175-7598
Subject:
phosphates,   etc   ; phosphorus; thermodynamics; wastewater;     Show all 4 Subjects
Abstract:
... Anaerobic biological phosphorus removal has proposed a new direction for the removal of phosphorus from wastewater, and the discovery of phosphate reduction makes people have a more comprehensive understanding of microbial phosphorus cycling. Here, from the perspective of thermodynamics, the bioreduction reaction of phosphate was analyzed and its mechanism was discussed. The research progress of p ...
DOI:
10.1007/s00253-019-09634-0

2. Protein Flexibility and Stiffness Enable Efficient Enzymatic Catalysis

Author:
Richard, John P.
Source:
Journal of the American Chemical Society 2019 v.141 no.8 pp. 3320-3331
ISSN:
1520-5126
Subject:
phosphates; triose-phosphate isomerase,   etc   ; catalysts; catalytic activity; energy; models;     Show all 6 Subjects
Abstract:
... The enormous rate accelerations observed for many enzyme catalysts are due to strong stabilizing interactions between the protein and reaction transition state. The defining property of these catalysts is their specificity for binding the transition state with a much higher affinity than substrate. Experimental results are presented which show that the phosphodianion-binding energy of phosphate mo ...
DOI:
10.1021/jacs.8b10836

3. Halogen bonding in UiO-66 frameworks promotes superior chemical warfare agent simulant degradation

Author:
Kalaj, Mark; Momeni, Mohammad R.; Bentz, Kyle C.; Barcus, Kyle S.; Palomba, Joseph M.; Paesani, Francesco; Cohen, Seth M.
Source:
Chemical communications 2019 v.55 no.24 pp. 3481-3484
ISSN:
1364-548X
Subject:
phosphates,   etc   ; chemical bonding; hydrolysis; iodine; ligands;     Show all 5 Subjects
Abstract:
... Herein, a series of halogenated UiO-66 derivatives was synthesized and analyzed for the breakdown of the chemical warfare agent simulant dimethyl-4-nitrophenyl phosphate (DMNP) to analyze ligand effects. UiO-66-I degrades DMNP at a rate four times faster than the most active previously reported MOFs. MOF defects were quantified and ruled out as a cause for increased activity. Theoretical calculati ...
DOI:
10.1039/c9cc00642g

4. Enhanced Cycling Stability and Rate Capability in a La-Doped Na₃V₂(PO₄)₃/C Cathode for High-Performance Sodium Ion Batteries

Author:
Bi, Linnan; Li, Xiaoyan; Liu, Xiaoqin; Zheng, Qiaoji; Lin, Dunmin
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.8 pp. 7693-7699
ISSN:
2168-0485
Subject:
phosphates,   etc   ; batteries; carbon; cathodes; lanthanum; sodium;     Show all 6 Subjects
Abstract:
... In recent years, phosphate Na₃V₂(PO₄)₃ (NVP) has attracted considerable attention as a promising cathode for high-performance sodium ion batteries owing to its open 3D framework structure. However, low rate capacity of the material greatly hampers the practical application due to its poor conductivity. Herein, La-doped Na₃V₂–ₓLaₓ(PO₄)₃/C materials were prepared by a combination process of sol–gel ...
DOI:
10.1021/acssuschemeng.8b06385

5. A vanadium-based metal–organic phosphate framework material K₂[(VO)₂(HPO₄)₂(C₂O₄)] as a cathode for potassium-ion batteries

Author:
Liao, Jiaying; Hu, Qiao; Mu, Jinxiao; He, Xiaodong; Wang, Shuo; Chen, Chunhua
Source:
Chemical communications 2019 v.55 no.5 pp. 659-662
ISSN:
1364-548X
Subject:
phosphates,   etc   ; batteries; cathodes; chemical reactions; electrochemistry; potassium;     Show all 6 Subjects
Abstract:
... Herein, we report a layered material K₂[(VO)₂(HPO₄)₂(C₂O₄)] with a large interplanar lattice spacing. Highly reversible K⁺ extraction and insertion in the layers are achieved, with a good cycling stability of up to 200 cycles (83% of retention). And the structural evolution of this material during the electrochemical processes is explored. ...
DOI:
10.1039/c8cc08734b

6. Density Scaling in Ionic Glass Formers Controlled by Grotthuss Conduction

Author:
Wojnarowska, Z.; Tajber, L.; Paluch, M.
Source:
TheJournal of physical chemistry 2019 v.123 no.5 pp. 1156-1160
ISSN:
1520-5207
Subject:
phosphates,   etc   ; glass; liquids; physical chemistry; temperature; thermodynamics;     Show all 6 Subjects
Abstract:
... We present investigations of the charge transport in an ionic glass-former carvedilol dihydrogen phosphate (CP) at various T–P–V thermodynamic conditions in terms of density scaling concept. The studied material was found to reveal superprotonic properties both at ambient and elevated pressure, as proved by the Walden rule. Surprisingly, from the isobaric conductivity data, the relaxation times τσ ...
DOI:
10.1021/acs.jpcb.8b09396

7. Regioselective 5′-position phosphorylation of ribose and ribonucleosides: phosphate transfer in the activated pyrophosphate complex in the gas phase

Author:
HuThese authors contributed equally., Jun; Lei, Wen; Wang, Jiang; Chen, Hong-Yuan; Xu, Jing-Juan
Source:
Chemical communications 2019 v.55 no.3 pp. 310-313
ISSN:
1364-548X
Subject:
phosphates,   etc   ; gases; ionization; phosphorylation; regioselectivity; ribonucleosides; ribose;     Show all 7 Subjects
Abstract:
... Herein, we present a rapid, efficient and regioselective phosphorylation method at the 5′-position of unprotected ribose and ribonucleosides with pyrophosphate in the gas phase, which involves the formation of anionic complexes via electrospray ionization and collisional activation to induce phosphorylation within the complexes. ...
DOI:
10.1039/c8cc08510b

8. Phosphorus recovery from freeze-microwave pretreated sludge supernatant by phosphate sedimentation

Author:
Chang, Xiao; Zeng, Wei; Li, Ning; Li, Shuaishuai; Peng, Yongzhen
Source:
Environmental science and pollution research international 2019 v.26 no.13 pp. 12859-12866
ISSN:
0944-1344
Subject:
calcium phosphates; magnesium ammonium phosphate,   etc   ; freezing; magnesium; minerals; mixing; orthophosphates; pH; phosphorus; sediments; sludge;     Show all 11 Subjects
Abstract:
... A novel pretreatment approach combined freeze with microwave was developed to promote the release of orthophosphate from excess sludge, and the phosphorus (P) was recovered from the produced supernatant by phosphate sedimentation. Batch tests examined the effects of freezing time, pH, and microwave time on the release of phosphate (PO₄³⁻-P) of the excess sludge during the freezing-microwave pretre ...
DOI:
10.1007/s11356-019-04743-9

9. Improving of cephalotaxine production in Cephalotaxus mannii suspension cultures by alanine and its derivatives

Author:
Li, Yong-Cheng; Jiang, Xuan-Xian
Source:
Plant cell, tissue, and organ culture 2019 v.136 no.1 pp. 101-108
ISSN:
0167-6857
Subject:
glucose 6-phosphate; pentose phosphate cycle,   etc   ; Cephalotaxus mannii; alanine; biosynthesis; metabolites; pyruvate kinase; pyruvic acid;     Show all 8 Subjects
Abstract:
... The effects of L-alanine and its derivatives on cephalotaxine production of Cephalotaxus mannii suspension cultures were investigated in this paper. L-alanine, L-cyclohexylalanine and D-alanine, respectively were added to the suspension cultures of C. mannii cell at day 15 of cultivation. The cultures treated with L-cyclohexylalanine showed the highest cephalotaxine yield in all treated cultures. ...
DOI:
10.1007/s11240-018-1495-5

10. Non-Centrosymmetric RbNaMgP2O7 with Unprecedented Thermo-Induced Enhancement of Second Harmonic Generation

Author:
Zhao, Sangen; Yang, Xiaoyan; Yang, Yi; Kuang, Xiaojun; Lu, Fengqi; Shan, Pai; Sun, Zhihua; Lin, Zheshuai; Hong, Maochun; Luo, Junhua
Source:
Journal of the American Chemical Society 2018 v.140 no.5 pp. 1592-1595
ISSN:
1520-5126
Subject:
phosphates,   etc   ; phase transition; temperature;     Show all 3 Subjects
Abstract:
... It is of great difficulty to obtain deep-UV transparent materials with enhanced second harmonic generation (SHG), mainly limited by the theoretically poor transparency of these materials in the deep-UV spectral region. Here we report a new noncentrosymmetric, deep-UV transparent phosphate RbNaMgP₂O₇, which undergoes a thermo-induced reversible phase transition (at a high temperature of 723 K) and ...
DOI:
10.1021/jacs.7b12518

11. Flow injection programmed to function in batch mode is used to determine molar absorptivity and to investigate the phosphomolybdenum blue method

Author:
Ruzicka, Jaromir (Jarda); Marshall, Graham D.; Measures, Christopher I.; Hatta, Mariko
Source:
Talanta 2019 v.201 pp. 519-526
ISSN:
0039-9140
Subject:
phosphates,   etc   ; absorptivity; analytical methods; chemistry; detection limit; iron;     Show all 6 Subjects
Abstract:
... The ultimate goal of flow-based analytical techniques is to automate serial assays of a target analyte. However, when developing any reagent-based assay, the underlying chemistry has to be investigated and understood a step, which is almost always the most challenging component of the optimization effort. The difficulty lies in that almost all reagent-based assays were initially developed and opti ...
DOI:
10.1016/j.talanta.2019.04.015

12. Formation and properties of amorphous magnesium-calcium phosphate particles in a simulated intestinal fluid

Author:
Gelli, Rita; Tempesti, Paolo; Ridi, Francesca; Baglioni, Piero
Source:
Journal of colloid and interface science 2019 v.546 pp. 130-138
ISSN:
0021-9797
Subject:
phosphates,   etc   ; crystallization; humans; lecithins; microparticles; nanoparticles; small intestine;     Show all 7 Subjects
Abstract:
... The endogenous self-assembly of amorphous magnesium-calcium phosphate (AMCP) nanoparticles in human small intestine is an intriguing and newly-discovered process involved in immune-surveillance mechanisms. The study of nano and microparticles formation in complex media mimicking in vivo conditions contributes to unravel the features of endogenous AMCPs and, from a physico-chemical perspective, to ...
DOI:
10.1016/j.jcis.2019.03.060

13. Substitution of Secondary Benzylic Phosphates with Diarylmethyl Anions

Author:
Shinohara, Riku; Kawashima, Hidehisa; Ogawa, Narihito; Kobayashi, Yuichi
Source:
Tetrahedron 2019 v.75 no.18 pp. 2717-2725
ISSN:
0040-4020
Subject:
phosphates,   etc   ; anions; biphenyl; chemical reactions; chemical structure; fluorenes; stereochemistry;     Show all 7 Subjects
Abstract:
... Substitution of diethyl and diphenyl benzylic phosphates, Alk-CH(Ar1)OP(O)(OR)2 (R = Et, Ph; Alk = Me, Et, i-Pr; Ar1 = aryl), with the anions derived from Ar2CH2 (Ph2CH2,9H-xanthene and fluorene) and n-BuLi at –15 °C was studied. For phosphates with Me as an Alk, diethyl phosphates produced Me-CH(Ar1)CH(Ar2)2 (Ar1 = 4-halo-, 4-CN, 4-Me-, 2-Me, 2-Br-, 3-MeO-phenyl and 2-naphthyl). However, an unwan ...
DOI:
10.1016/j.tet.2019.03.050

14. A reanalysis of protein tyrosine phosphatases inhibitory studies using the unnatural substrate analogue p-nitrophenyl phosphate

Author:
Walsh, Ryan
Source:
Analytical biochemistry 2019 v.572 pp. 58-62
ISSN:
0003-2697
Subject:
phosphates,   etc   ; drug interactions; enzyme inhibition; models; protein-tyrosine-phosphatase;     Show all 5 Subjects
Abstract:
... The determination of inhibition mode is extremely important in the understanding of drug interactions and biological mechanisms. The data presented by Hjortness et al. in their recent papers [1,2] on the inhibition of various Protein Tyrosine Phosphatases addresses this issue in an exemplary manner, determining the mode of inhibition based on global fitting of the data to multiple models of inhibi ...
DOI:
10.1016/j.ab.2019.02.025

15. Biocompatibility and effectiveness of paclitaxel-encapsulated micelle using phosphoester compounds as a carrier for cancer treatment

Author:
Takeuchi, Issei; Makino, Kimiko
Source:
Colloids and surfaces 2019 v.177 pp. 356-361
ISSN:
0927-7765
Subject:
phosphates,   etc   ; biocompatibility; colloids; drug carriers; hemolysis; micelles; neoplasms; pH; paclitaxel;     Show all 9 Subjects
Abstract:
... Phosphoester compounds are promising materials with expected biocompatibility; however, little has been reported on the use of phosphoester compounds for micelle formulations. In this study, paclitaxel (PTX)–encapsulated micelles were prepared using four kinds of alkyl di(MePEG-lactate) phosphates. From the results of the determination of critical micelle concentrations and an in vitro stability t ...
DOI:
10.1016/j.colsurfb.2019.02.017

16. Cobalt (oxy)hydroxide nanosheet arrays with exceptional porosity and rich defects as a highly efficient oxygen evolution electrocatalyst under neutral conditions

Author:
Chen, Minqi; Xie, Yanyu; Wu, Jun-Xi; Huang, Huanfeng; Teng, Jun; Wang, Dawei; Fan, Yanan; Jiang, Ji-Jun; Wang, Hai-Ping; Su, Cheng-Yong
Source:
Journal of materials chemistry A 2019 v.7 no.17 pp. 10217-10224
ISSN:
2050-7496
Subject:
phosphates,   etc   ; carbon; cobalt; durability; nanosheets; oxygen production; porosity;     Show all 7 Subjects
Abstract:
... An oxidation-mediated defect and porosity enrichment strategy is developed for the synthesis of a new electrocatalyst consisting of cobalt (oxy)hydroxide nanosheet arrays (denoted as CoOₓHy NSAs) grown on carbon cloth (CC), which feature a 3D hierarchical nanostructure with exceptional porosity and rich defects. The CoOₓHy/CC shows exceptional activity and stability for the oxygen evolution reacti ...
DOI:
10.1039/c9ta00380k

17. Effects of Long-Term Fertilization on the Form of Inorganic Phosphorus and the Characteristic of Adsorption and Desorption in Black Soil

Author:
Lv, Haiyan; Yang, Hongtao
Source:
Communications in soil science and plant analysis 2019 v.50 no.6 pp. 763-771
ISSN:
1532-2416
Subject:
phosphates,   etc   ; adsorption; desorption; energy; equations; inorganic phosphorus; soil; sorption isotherms;     Show all 8 Subjects
Abstract:
... Changes of inorganic phosphorus forms and the characteristics of phosphorus adsorption and desorption were studied under a long-term fertilization experiment in black soil. Results showed that the forms of inorganic phosphorus ranged as O–P < Ca₂–P < Ca₈–P < Al–P < Ca₁₀–P < Fe–P. Therefore, Fe–P was the main inorganic phosphorus form in this study. The capacity of phosphorus adsorption with phosph ...
DOI:
10.1080/00103624.2019.1589485

18. Pyridoxal phosphate-dependent reactions in the biosynthesis of natural products

Author:
Du, Yi-Ling; Ryan, Katherine S.
Source:
Natural product reports 2019 v.36 no.3 pp. 430-457
ISSN:
1460-4752
Subject:
pyridoxal phosphate,   etc   ; amino acids; biosynthesis; enzymes; pyridoxal; superoxide anion;     Show all 6 Subjects
Abstract:
... Covering: up to mid-2018 Pyridoxal 5′-phosphate (PLP) is a versatile organic cofactor used to catalyze diverse reactions on amino acid, oxoacid, and amine substrates. Here we review the reactions catalyzed by PLP-dependent enzymes, highlighting enzymes reported in the natural product biosynthetic literature. We describe enzymes that catalyze transaminations, Claisen-like condensations, and β- and ...
DOI:
10.1039/c8np00049b

19. A copperohydrogel as a chemosensor for selective detection of oxometalate anions in water

Author:
Khavasi, Hamid Reza; Jelokhani, Elham
Source:
Journal of materials chemistry A 2019 v.7 no.12 pp. 6638-6643
ISSN:
2050-7496
Subject:
phosphates,   etc   ; anions; chemistry; copper; ligands; molybdates; nitrates; nitrites;     Show all 8 Subjects
Abstract:
... A copperohydrogel prepared by an easy method from the 4′-(3,4-dimethoxy-phenyl)-[2,2′;6′,2′′]terpyridine ligand and Cu²⁺ ion is shown to act as a highly efficient and selective naked eye sensor for biologically relevant tetrahedral oxometalate anions such as molybdate, tungstate and vanadate over simple anions as well as oxoanions such as halide, nitrate, nitrite and phosphate in water. ...
DOI:
10.1039/c9ta00912d

20. An all superantiwetting surface in water–oil–air systems

Author:
Tie, Lu; Li, Jing; Guo, Zhiguang; Liang, Yongmin; Liu, Weimin
Source:
Journal of materials chemistry A 2019 v.7 no.12 pp. 6957-6962
ISSN:
2050-7496
Subject:
aluminum phosphate,   etc   ; air; contact angle; hydrophobicity; oils; spraying; titanium dioxide;     Show all 7 Subjects
Abstract:
... Superantiwetting surfaces with contact angles above 150° and sliding angles below 10° for one wetting phase under another medium phase among water, oil, and air have been designed. However, all superantiwetting surfaces that show super-repellence in any two-phase system including six extreme wetting states such as superhydrophobicity, superoleophobicity, underoil superhydrophobicity, underwater su ...
DOI:
10.1039/c8ta12521j