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https://www.readbyqxmd.com/read/30016645/modulation-of-calcium-oxalate-dihydrate-growth-by-phosphorylated-osteopontin-peptides
#1
Yung-Ching Chien, Ahmad Mansouri, Wenge Jiang, Saeed R Khan, Jeffrey J Gray, Marc D McKee
Osteopontin (OPN) is a significant component of kidney stone matrix and a key modulator of stone formation. Here, we investigated the effects of different phosphorylated states of a synthesized peptide of OPN (the ASARM peptide) on calcium oxalate dihydrate (COD) crystals, a major mineral phase of kidney stones. In vitro, phosphorylated OPN-ASARM peptides strongly inhibited COD crystal growth in solution as compared to the nonphosphorylated state, with increasing inhibitory potency correlating with the degree of peptide phosphorylation...
July 14, 2018: Journal of Structural Biology
https://www.readbyqxmd.com/read/30015193/feasibility-of-nanoscale-zero-valent-iron-to-enhance-the-removal-efficiencies-of-heavy-metals-from-polluted-soils-by-organic-acids
#2
Yaru Cao, Shirong Zhang, Qinmei Zhong, Guiyin Wang, Xiaoxun Xu, Ting Li, Lilin Wang, Yongxia Jia, Yun Li
Soil washing with natural chelators to remediate metal-contaminated soils has been gained attention by researchers. However, the abilities of the chelators to remediate the multiple metal polluted soils are less effective. This study employed zero-valent iron nanoparticle (nZVI) to enhance the removal efficiencies of citric (CA), tartaric (TA) and oxalic acids (OA), and evaluate their feasibility. Results showed that metal removal efficiencies increased with the increasing concentration of nZVI and soil-liquid ratio, decreased with the increasing solution pH...
July 13, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30015090/evaluation-of-a-chloride-based-89-zr-isolation-strategy-using-a-tributyl-phosphate-tbp-functionalized-extraction-resin
#3
Stephen A Graves, Christopher Kutyreff, Kendall E Barrett, Reinier Hernandez, Paul A Ellison, Steffen Happel, Eduardo Aluicio-Sarduy, Todd E Barnhart, Robert J Nickles, Jonathan W Engle
INTRODUCTION: The remarkable stability of the 89 Zr-DOTA complex has been shown in recent literature. The formation of this complex appears to require 89 Zr-chloride as the complexation precursor rather than the more conventional 89 Zr-oxalate. In this work we present a method for the direct isolation of 89 Zr-chloride from irradiated nat Y foils. METHODS: 89 Zr, 88 Zr, and 88 Y were prepared by 16 MeV proton irradiation of nat Y foils and used for batch-extraction based equilibrium coefficient measurements for TBP and UTEVA resin...
June 18, 2018: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/30010507/the-enhanced-effect-of-oxalic-acid-on-the-electroreduction-of-cr-vi-via-formation-of-intermediate-cr-vi-oxalate-complex
#4
Yijie Liu, Shuaishuai Xin, Bo Jiang
In this study, the enhanced effect of oxalic acid (Ox) on Cr(VI) electroreduction was evaluated. It was found that for Cr(VI)-contaminated solution ([Cr(VI)]0 = 1.0 mM, pH = 3.0), addition of 5.0 mM Ox can significantly increase Cr(VI) reduction from 0.36 to 1.0 mM within 90 min electrolysis reaction, accompanying with the increase of current efficiency from 19% to 53%. Increasing initial Ox concentration (0-10 mM) and electric current (10-40 mA) facilitated Cr(VI) reduction, whereas it was inhibited with decreasing solution pH value (2...
July 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30005343/photodegradation-of-amitriptyline-in-fe-iii-citrate-oxalate-binary-system-synergistic-effect-and-mechanism
#5
Dong Wan, Jiaolan Zuo, Yong Chen, Qian Chen, Yuegang Zuo
Fe(III) and carboxylic acids are ubiquitous in surface water and atmospheric water droplets. Numerous documents have reported the photochemistry of Fe(III)-carboxylate complexes, typically including Fe(III)-oxalate and Fe(III)-citrate. Our previous study preliminarily showed that oxalate enhances the photoreactivity of Fe(III)-citrate system. Here, we further investigate the synergistic effect of Fe(III)-citrate-oxalate binary system at different conditions with pharmaceutical amitriptyline (AMT) as the model pollutant...
July 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/30005342/molecular-understanding-of-the-interaction-of-amino-acids-with-sulfuric-acid-in-the-presence-of-water-and-the-atmospheric-implication
#6
Pu Ge, Gen Luo, Yi Luo, Wei Huang, Hongbin Xie, Jingwen Chen, Jingping Qu
Amino acids are important components of atmospheric aerosols. Despite the diversity of amino acids structures, however, the role of amino acids with additional non-characteristic functional groups in new particle formation (NPF) has almost remained unexplored. Herein, the interaction of serine (Ser) and threonine (Thr), which feature a hydroxyl group and differ by a methyl-substitution, with sulfuric acid (SA) and up to three water (W) molecules has been investigated at the M06-2X/6-311++G (3df, 3pd) level of theory...
July 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/30004680/a-multifunctional-lanthanide-carbonate-cluster-based-metal-organic-framework-exhibits-high-proton-transport-and-magnetic-entropy-change
#7
Qun Tang, Yan-Li Yang, Ning Zhang, Zheng Liu, Shu-Hua Zhang, Fu-Shun Tang, Jia-Yi Hu, Yan-Zhen Zheng, Fu-Pei Liang
A novel multifunctional, three-dimensional (3D) lanthanide carbonate cluster based metal-organic framework (MOF) with the general formula {[Gd2 (CO3 )(ox)2 (H2 O)2 ]·3H2 O} n (1) has been synthesized via self-assembly of gadolinium (Gd) carbonate and oxalate under hydrothermal conditions. Single-crystal X-ray diffraction reveals that the compound 1 consists of the Gd carbonate cluster with oxalic acid ligands, which form a 3D framework structure with an ordered one-dimensional (1D) pore channel along the a-axis...
July 13, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/30002986/high-expression-of-slc26a6-in-the-kidney-may-contribute-to-renal-calcification-via-an-slc26a6-dependent-mechanism
#8
Hongyang Jiang, Gaurab Pokhrel, Yinwei Chen, Tao Wang, Chunping Yin, Jihong Liu, Shaogang Wang, Zhuo Liu
Background: Solute-linked carrier 26 gene family 6 (SLC26A6), which is mainly expressed in intestines and kidneys, is a multifunctional anion transporter crucial in the transport of oxalate anions. This study aimed to investigate the role of kidney SLC26A6 in urolithiasis. Methods: Patients were divided into two groups: stone formers and nonstone formers. Samples were collected from patients following nephrectomy. Lentivirus with Slc26a6 (lentivirus-Slc26a6) sequence and lentivirus with siRNA-Slc26a6 (lentivirus-siRNA-Slc26a6) sequence were transfected into rats' kidneys respectively and Slc26a6 expression was detected using Western blot and immunohistochemical analyses...
2018: PeerJ
https://www.readbyqxmd.com/read/30002883/spontaneous-enanti-omorphism-in-poly-phased-alkaline-salts-of-tris-oxalato-ferrate-iii-crystal-structure-of-cubic-narb-5-fe-c-2-o-4-3-2
#9
O E Piro, G A Echeverría, E J Baran
We show here that the phenomenon of spontaneous resolution of enanti-omers occurs during the crystallization of the sodium and rubidium double salts of the transition metal complex tris-(oxalato)ferrate(III), namely sodium penta-rubidium bis-[tris-(oxalato)ferrate(III)], NaRb5 [Fe(C2 O4 )3 ]2 . One enanti-omer of the salt crystallizes in the cubic space group P 43 32 with Z = 4 and a Flack absolute structure parameter x = -0.01 (1) and its chiral counterpart in the space group P 41 32 with x = -0.00 (1)...
July 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/30001236/acquired-cystic-disease-associated-renal-cell-carcinoma-ackd-rcc-like-cysts
#10
Yue Sun, Pedram Argani, Satish K Tickoo, Jonathan I Epstein
Acquired cystic disease-associated renal cell carcinoma (ACKD-RCC), originally described by Tickoo and colleagues, is found exclusively in patients with end-stage renal disease. Tickoo and colleagues noted: "Many of the tumors (16 of 24 dominant tumors) appeared to arise in a cyst, most often completely filling the cystic space. The cells lining such cysts were morphologically similar to those in the rest of the tumor." Subsequent literature lacks analysis of cysts lined by cells identical to ACKD-RCC, yet lacking areas of solid growth...
July 11, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29997631/metabolomic-evaluation-of-the-quality-of-leaf-lettuce-grown-in-practical-plant-factory-to-capture-metabolite-signature
#11
Yoshio Tamura, Tetsuya Mori, Ryo Nakabayashi, Makoto Kobayashi, Kazuki Saito, Seiichi Okazaki, Ning Wang, Miyako Kusano
Vegetables produce metabolites that affect their taste and nutritional value and compounds that contribute to human health. The quality of vegetables grown in plant factories under hydroponic cultivation, e.g., their sweetness and softness, can be improved by controlling growth factors including the temperature, humidity, light source, and fertilizer. However, soil is cheaper than hydroponic cultivation and the visual phenotype of vegetables grown under the two conditions is different. As it is not clear whether their metabolite composition is also different, we studied leaf lettuce raised under the hydroponic condition in practical plant factory and strictly controlled soil condition...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29990820/fe-iii-oxalate-complex-mediated-phosphate-released-from-diazinon-photodegradation-pathway-signatures-based-on-oxygen-isotopes
#12
Jianwei Zhao, Yongcan Jiang, Minghao Kong, Guanglong Liu, Dionysios D Dionysiou
The photodegradation of organophosphorus pesticides has an important influence on their fate and bioavailability in the water environment. In this study, the kinetics and mechanisms of diazinon photodegradation by Fe(III)-oxalate complex have been determined. Special attention was given to the pathway by which phosphate is released following diazinon photodegradation, as assessed by HPLC-ESI-Q/TOF-MS coupled with oxygen isotope. The results showed that diazinon was stable under dark treatment. However, the degradation of diazinon was observed in the UV-only, UV-Fe(III), and UV-Fe(III)-oxalate treatments...
July 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29988487/taxonomic-demarcation-of-setaria-pumila-poir-roem-schult-s-verticillata-l-p-beauv-and-s-viridis-l-p-beauv-cenchrinae-paniceae-panicoideae-poaceae-from-phytolith-signatures
#13
Mudassir A Bhat, Sheikh A Shakoor, Priya Badgal, Amarjit S Soodan
Background and Aims: The role and significance of phytoliths in taxonomic diagnosis of grass species has been well documented with a focus on the types found in foliar epidermis and the synflorescence. The present paper is an attempt to broaden the scope of phytoliths in species diagnosis of grasses by developing phytolith signatures of some species of the foxtail genus Setaria P. Beauv. through in situ location and physico-chemical analysis of various phytolith morphotypes in different parts of the plant body...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29987470/several-newly-discovered-mo-enriched-plants-with-a-focus-on-macleaya-cordata
#14
Jie Wang, Xiao Wang, Jike Li, Hongxiao Zhang, Yan Xia, Chen Chen, Zhenguo Shen, Yahua Chen
Phytoremediation as an alternative strategy has been a widespread attention. The screening of enriched plants and hyperaccumulators is the key of the strategy. So this study examined the status of heavy metal pollution in molybdenum (Mo) mine soils, metal accumulation in plants growing on mine, and their tolerance strategies. The analysis of 14 soils and 27 plant samples in mining area showed that Mo, zinc (Zn), and cadmium (Cd) concentrations exceeded soil safety standards and their levels varied in 27 plant samples...
July 10, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29983044/controlling-the-reaction-of-nanoparticles-for-hollow-metal-oxides-nanostructures
#15
Yong-Gang Sun, Jun-Yu Piao, Lin-Lin Hu, De-Shan Bin, Xi-Jie Lin, Shu-Yi Duan, An-Min Cao, Li-Jun Wan
Hollow nanostructures of metal oxides have found broad applications in different fields. Here, we reported a facile and versatile synthetic protocol to prepare hollow metal oxide nanospheres by modulating the internal chemical difference of solid nanoparticles. Our synthesis design starts with the precipitation of urea-containing metal oxalate, which are soluble in water but exists as solid nanospheres in ethanol. A controlled particle hydrolysis is achieved through the heating-induced urea decomposition, which transforms the particle composition in an outside-to-inside style: The reaction starts from the surface, and then proceeds inward to gradually form a water-insoluble shell of basic metal oxalate...
July 8, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29980798/high-prevalence-of-pediatric-urinary-tract-stones-in-xinjiang-uyghur
#16
Jian Huang, Hamulati Tusong, Abudukahaer Batuer, Aierken Tuerxun, Hans-Göran Tiselius, Wenqi Wu
The aim of the study was to report the characteristics of urolithiasis in Uyghur patients from Xinjiang, China. The composition of stones collected from 1863 patients in the Uyghur region of Xinjiang was analyzed. The median age of patients was 17 years [25th and 75th percentiles: 2, 36]. The stones were delivered by 1299 males (69.7%) and 564 females (30.3%). Calcium oxalate was the predominant stone component in 42.1% of the patients, followed by ammonium urate in 20.6%. Females had formed more stones of magnesium ammonium phosphate 8...
July 6, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29980178/efficacy-of-hydroxy-l-proline-hyp-analogs-in-the-treatment-of-primary-hyperoxaluria-in-drosophila-melanogaster
#17
Huan Yang, Musa Male, Yang Li, Ning Wang, Chenming Zhao, Shan Jin, Juncheng Hu, Zhiqiang Chen, Zhangqun Ye, Hua Xu
BACKGROUND: Substrate reduction therapy with analogs reduces the accumulation of substrates by inhibiting the metabolic pathways involved in their biosynthesis, providing new treatment options for patients with primary hyperoxalurias (PHs) that often progress to end-stage renal disease (ESRD). This research aims to evaluate the inhibition efficacy of Hydroxy-L-proline (HYP) analogs against calcium oxalate (CaOx) crystal formation in the Drosophila Melanogaster (D. Melanogaster) by comparing them with Pyridoxine (Vitamin B6)...
July 6, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29976912/acid-assisted-organosolv-delignification-of-beechwood-and-pulp-conversion-towards-high-concentrated-cellulosic-ethanol-via-high-gravity-enzymatic-hydrolysis-and-fermentation
#18
Konstantinos G Kalogiannis, Leonidas Matsakas, James Aspden, Angelos A Lappas, Ulrika Rova, Paul Christakopoulos
BACKGROUND: Future biorefineries will focus on converting low value waste streams to chemical products that are derived from petroleum or refined sugars. Feedstock pretreatment in a simple, cost effective, agnostic manner is a major challenge. METHODS: In this work, beechwood sawdust was delignified via an organosolv process, assisted by homogeneous inorganic acid catalysis. Mixtures of water and several organic solvents were evaluated for their performance. Specifically, ethanol (EtOH), acetone (AC), and methyl- isobutyl- ketone (MIBK) were tested with or without the use of homogeneous acid catalysis employing sulfuric, phosphoric, and oxalic acids under relatively mild temperature of 175 °C for one hour...
July 5, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29974118/playing-with-pearson-s-concept-orthogonally-functionalized-1-4-diaza-1-3-butadienes-leading-to-heterobinuclear-complexes
#19
J P Neu, P Di Martino-Fumo, B Oelkers, Y Sun, A Neuba, M Gerhards, W R Thiel
By reacting 1,2-diketones and ortho- diphenylphosphinoyl aniline in the presence of zinc(ii) as a templating agent, cationic zinc(ii) complexes of novel phosphine oxide functionalized 1,4-diaza-1,3-butadiene ligands are acessible. Herein the zinc(ii) site is bound to all four donor atoms of the ligand. Depending on the flexibility of the 1,4-diaza-1,3-butadiene backbone, the bonds to zinc(ii) from the 1,4-diaza-1,3-butadiene donors can be broken. Reaction with oxalate cleaves the zinc(ii) coordination completely and makes accessible the free ligands possessing orthogonal (N,N: soft; O,O: hard) sets of donor sites...
July 5, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29974097/synthesis-in-vitro-cytotoxicity-and-structure-activity-relationships-sar-of-multidentate-oxidovanadium-iv-complexes-as-anticancer-agents
#20
Lubin Ni, Hongxia Zhao, Li Tao, Xing Li, Zhaohui Zhou, Yun Sun, Chong Chen, Duo Wei, Yanqing Liu, Guowang Diao
Multidentate oxidovanadium(iv) complexes with different geometric configurations [VO(ox)(bpy)(H2O)] 1, [VO(ox)(phen)(H2O)] 2, [VO(ida)(bpy)]·2H2O 3, (phen)[VO(ida)(phen)]·4H2O 4, and (Hphen)[VO(H2O)(nta)]·2H2O 5 [ox = oxalic acid, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline, ida = iminodiacetic acid, nta = nitrilotriacetic acid] have been obtained from the reactions of oxidovanadium sulfate or vanadium pentoxide with oxalates, amino-polycarboxylates and N-heterocyclic ligands in neutral solution by the hydrothermal method, and have been fully characterized by elemental, thermogravimetric analyses and single crystal X-ray diffraction, as well as a wide range of spectroscopic techniques such as FT-IR, UV/Vis, NMR, ESI-MS...
July 5, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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