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https://www.readbyqxmd.com/read/28726918/two-hybrid-lanthanide-complexes-exhibiting-a-large-magnetocaloric-effect-and-slow-magnetic-relaxation
#1
Song-De Han, Jin-Hua Li, Hao-Hao Liu, Guo-Ming Wang
Two isostructural lanthanide (Ln) hybrid complexes co-bridged by organic oxalate and inorganic hypophosphite, [Ln(oxa)(H2PO2)(H2O)2] (oxa = oxalate; Ln = Gd (1), Dy (2)), were solvothermally prepared with the goal of elucidating the role of a hybrid framework in the generation of novel molecular magnetic materials. The title compounds feature a two dimensional (2D) hybrid layer. The Ln(III) ions are octa-coordinated with distorted square antiprism geometry. The adjacent Ln(III) ions are co-bridged by hypophosphite and one type of oxalate ligand to form 1D hybrid chains, which are further linked by a second type of oxalate ligand to generate the resulting 2D framework...
July 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28720977/effect-of-integration-of-oxalic-acid-and-hot-water-treatments-on-postharvest-quality-of-rambutan-nephelium-lappaceum-l-cv-anak-sekolah-under-modified-atmosphere-packaging
#2
Ahmad Faiz Ahmad Hafiz, Yeoh Wei Keat, Asgar Ali
The shelf life of rambutan is often limited due to rapid water loss from the spinterns and browning of the pericarp. An integrated approach, which combined hot water treatment (HWT) (56 °C for 1 min), oxalic acid (OA) dip (10% for 10 min) and modified atmosphere packaging (MAP), was used to study their effectiveness on the quality of rambutan during storage (10 °C, 90-95% relative humidity). Significant differences were observed in rambutan quality with the combination of MAP + HWT + OA after 20 days of storage...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28718628/synthesis-and-electrochemical-reaction-of-tin-oxalate-reduced-graphene-oxide-composite-anode-for-rechargeable-lithium-batteries
#3
Jae-Sang Park, Jae Hyeon Jo, Hitoshi Yashiro, Sung-Soo Kim, Sun-Jae Kim, Yang-Kook Sun, Seung-Taek Myung
Unlike SnO2, few studies have reported on the use of SnC2O4 as an anode material for rechargeable lithium batteries. Here, we first introduce a SnC2O4-reduced graphene oxide composite produced via hydrothermal reactions followed by a layer-by-layer self-assembly process. The addition of rGO increased the electric conductivity up to ~10-3 S cm-1. As a result, the SnC2O4-reduced graphene oxide electrode exhibited a high charge (oxidation) capacity of ~1166 mAh g-1 at a current of 100 mA g-1 (0.1 C-rate) with a good retention delivering approximately 620 mAh g-1 at the 200th cycle...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28718073/a-randomised-phase-ii-iii-study-to-evaluate-the-efficacy-and-safety-of-orally-administered-oxalobacter-formigenes-to-treat-primary-hyperoxaluria
#4
Dawn Milliner, Bernd Hoppe, Jaap Groothoff
Primary hyperoxaluria (PH) patients overproduce oxalate because of rare genetic errors in glyoxylate metabolism. Recurrent urolithiasis and/or progressive nephrocalcinosis are PH hallmarks and can lead to kidney damage, systemic oxalosis and death. Based on previous studies, we hypothesised that treatment with the oxalate-metabolizing bacterium Oxalobacter formigenes would mediate active elimination of oxalate from the plasma to the intestine of PH patients, thereby reducing urinary oxalate excretion (Uox)...
July 17, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28717544/is-it-safe-to-prescribe-ascorbic-acid-for-urinary-acidification-in-stone-forming-patients-with-alkaline-urine
#5
Yasser A Noureldin, Alexandrine da Silva, Nader Fahmy, Sero Andonian
OBJECTIVE: To study the effect of ascorbic acid (AA) supplementation on urinary pH, metabolic stone workup parameters, and development of de novo urolithiasis in stone-forming patients. MATERIAL AND METHODS: A retrospective review of the patients followed-up at a tertiary stone centre between September 2009 and October 2015 was performed. Patients with recurrent urolithiasis who received AA supplementation as a urinary acidifying agent were included in the study...
June 2017: Turkish Journal of Urology
https://www.readbyqxmd.com/read/28716570/protective-effects-of-pistacia-lentiscus-l-fruit-extract-against-calcium-oxalate-monohydrate-induced-proximal-tubular-injury
#6
Nassima Cheraft-Bahloul, Cécile Husson, Meriam Ourtioualous, Sébastien Sinaeve, Djebbar Atmani, Caroline Stévigny, Joëlle L Nortier, Marie-Hélène Antoine
ETHNOPHARMACOLOGICAL RELEVANCE: The world prevalence of kidney stones is increasing and plants are frequently used to treat urolithiasis. Pistacia lentiscus L, a plant which freely grows around the Mediterranean basin areas, is widely used for various pathologies. P. lentiscus has an important impact as it has economical value on top of its pharmacological interest. Decoctions of its aerial parts and/or resin are used to treat kidney stones. AIM OF THE STUDY: To in vitro assess the potential nephroprotective effect of Pistacia lentiscus ethanolic fruit extract (PLEF) on proximal tubular cells in response to the adhesion of calcium oxalate monohydrate (COM) crystals...
July 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28713789/screening-of-oxalate-degrading-lactic-acid-bacteria-of-food-origin
#7
Nicoletta Murru, Giuseppe Blaiotta, Maria Francesca Peruzy, Serena Santonicola, Raffaelina Mercogliano, Maria Aponte
A screening for oxalate degrading abilities was initially carried on within Lactic Acid Bacteria cultures of different food origin. Seventy-nine strains were drop-inoculated onto MRS agar plates containing calcium oxalate. By comparing colonies diameters, 31 strains were used to inoculate, in parallel, MRS and MRS modified by sodium oxalate addition. Differences in the strains' growth were assessed by colony forming unit counts. For two strains, the growth in oxalate enriched medium was significantly higher; while, for eleven strains an opposite behaviour was recorded...
April 13, 2017: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/28711958/systematic-assessment-of-urinary-hydroxy-oxo-glutarate-for-diagnosis-and-follow-up-of-primary-hyperoxaluria-type-iii
#8
Ada Ventzke, Markus Feldkötter, Andrew Wei, Jutta Becker, Bodo B Beck, Bernd Hoppe
BACKGROUND: There are currently three distinct autosomal recessive inherited types of primary hyperoxaluria (PH: PHI, PHII, and PHIII), all characterized by the endogenous overproduction of oxalate. The PH type is difficult to differentiate by clinical features alone. In addition to universal general characteristics to all hyperoxaluria subtypes, specific urinary metabolites can be detected: glycolate in PHI, L-glyceric acid in PHII, and hydroxy-oxo-glutarate (HOG) in PHIII. PHIII is considered to be the most benign form and is characterized by severe recurrent urolithiasis in early life, followed by clinical remission in many, but not all patients...
July 15, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28710955/epidemiologic-evaluation-of-canine-urolithiasis-in-thailand-from-2009-to-2015
#9
Vachira Hunprasit, Carl A Osborne, Pamela J Schreiner, Jeff B Bender, Jody P Lulich
The cross-sectional study described the epidemiology of 8560 canine urolith submissions from Thailand to the Minnesota Urolith Center between January 2009 and December 2015. The frequency of urolith types, the relationships between urolith type and breed, sex, and neutered status, and change of annual submission proportion over the study period were analyzed. Struvite was the most common canine urolith (44%), and was commonly found in intact females with a mean age of 6.3±3.1years. Calcium oxalate was the second most common (27%), more frequently found in intact males with a mean age of 8...
July 9, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28707900/aerosol-fragmentation-driven-by-coupling-of-acid-base-and-free-radical-chemistry-in-the-heterogeneous-oxidation-of-aqueous-citric-acid-by-oh-radicals
#10
Matthew J Liu, Aaron A Wiegel, Kevin R Wilson, Frances A Houle
A key uncertainty in the heterogeneous oxidation of carboxylic acids by hydroxyl radicals (OH) in aqueous phase aerosol is how the free radical reaction pathways might be altered by acid-base chemistry. In particular, if acid-base reactions occur concurrently with acyloxy radical formation and unimolecular decomposition of alkoxy radicals, there is a possibility that differences in reaction pathways impact the partitioning of organic carbon between the gas and aqueous phases. To examine these questions, a kinetic model is developed for the OH initiated oxidation of citric acid aerosol at high relative humidity...
July 14, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28707190/novel-porcine-model-for-calcium-oxalate-stone-formation
#11
Brandon P Trojan, Sara J Trojan, Andrew Navetta, Bryce Staches, Bryan Sutton, Stephanie Filleur, Thomas Nelius
BACKGROUND: Mechanisms for calcium-based stone formation are not clearly delineated. Porcine are the most anatomically and physiologically congruent mammal to humans. Our objectives were to develop a cost-effective and easily reproducible porcine model for the study of calcium-based nephrolithiasis. METHODS: Crossbred male pigs (n = 16) were assigned randomly to one of the following treatments: (1) control; (2) ethylene glycol (EG) + vitamin D (VD); (3) EG + ammonium chloride (AC); (4) EG + gentamicin (G); (5) EG + Lasix; (6) EG + VD + AC; (7) EG + VD + G...
July 13, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28705966/genome-sequence-of-oxalobacter-formigenes-strain-oxcc13
#12
Marguerite Hatch, Milton J Allison, Fahong Yu, William Farmerie
The lack of Oxalobacter formigenes colonization in the human gut is generally acknowledged as a risk factor for kidney stone formation since this microorganism can play an important role in oxalate homeostasis. Here, we present the genome sequence of OXCC13, a human strain isolated from an individual residing in Germany.
July 13, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28705575/can-a-simplified-12-hour-night-time-urine-collection-predict-urinary-stone-risk
#13
Bryan D Hinck, Vishnuvardhan Ganesan, Sarah Tarplin, John Asplin, Ignacio Granja, Juan Calle, Sri Sivalingam, Manoj Monga
OBJECTIVES: To determine if there is correlation between night time 12-hour and traditional 24-hour urine collection in regards to chemistry values and the super-saturations of calcium oxalate, calcium phosphate, and uric acid for the metabolic evaluation of nephrolithiasis. METHODS: 95 patients were prospectively enrolled from 2013-2015. Patients >18 years of age who presented to a tertiary stone clinic and who would normally be counseled for 24-hour urine collection were eligible for the study...
July 10, 2017: Urology
https://www.readbyqxmd.com/read/28702047/transcriptome-analysis-of-al-induced-genes-in-buckwheat-fagopyrum-esculentum-moench-root-apex-new-insight-into-al-toxicity-and-resistance-mechanisms-in-an-al-accumulating-species
#14
Jia Meng Xu, Wei Fan, Jian Feng Jin, He Qiang Lou, Wei Wei Chen, Jian Li Yang, Shao Jian Zheng
Relying on Al-activated root oxalate secretion, and internal detoxification and accumulation of Al, buckwheat is highly Al resistant. However, the molecular mechanisms responsible for these processes are still poorly understood. It is well-known that root apex is the critical region of Al toxicity that rapidly impairs a series of events, thus, resulting in inhibition of root elongation. Here, we carried out transcriptome analysis of the buckwheat root apex (0-1 cm) with regards to early response (first 6 h) to Al stress (20 μM), which is crucial for identification of both genes and processes involved in Al toxicity and tolerance mechanisms...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28701869/identification-of-ginseng-root-using-quantitative-x-ray-microtomography
#15
Linlin Ye, Yanling Xue, Yudan Wang, Juncheng Qi, Tiqiao Xiao
BACKGROUND: The use of X-ray phase-contrast microtomography for the investigation of Chinese medicinal materials is advantageous for its nondestructive, in situ, and three-dimensional quantitative imaging properties. METHODS: The X-ray phase-contrast microtomography quantitative imaging method was used to investigate the microstructure of ginseng, and the phase-retrieval method is also employed to process the experimental data. Four different ginseng samples were collected and investigated; these were classified according to their species, production area, and sample growth pattern...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28696059/metal-and-metalloid-biorecovery-using-fungi
#16
Xinjin Liang, Geoffrey Michael Gadd
Bioleaching is a proven bioprocess for metal recovery by solution from solid matrices, while a bioprecipitation or biomineralization approach is of potential for biorecovery from solution. Fungi can directly and indirectly mediate the formation of many kinds of minerals, including oxides, phosphates, carbonates and oxalates, as well as elemental forms of metals and metalloids such as Ag, Se and Te. Fungal capabilities may offer a potentially useful contribution to biotechnological and physico-chemical methods for metal recovery...
July 11, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28691808/atr-ftir-and-flow-microcalorimetry-studies-on-the-initial-binding-kinetics-of-arsenicals-at-the-organic-hematite-interface
#17
Arthur Situm, Mohammad A Rahman, Nicholas Allen, Nadine Kabengi, Hind A Al-Abadleh
The environmental fate of arsenic compounds depends on their surface interactions with geosorbents that include clays, metal oxides and natural organic matter (NOM). While a number of batch studies reported that NOM inhibits the uptake of arsenicals, it remains unclear how different classes of organic functional groups affect their binding mechanisms. We report herein the adsorption kinetics of arsenate and dimethylarsinic acid (DMA) with hematite nanoparticles pre-exposed to three types of low molecular weight organics: citrate, oxalate and pyrocatechol as representatives to the majority of reactive organic functional groups in NOM...
July 10, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28691807/spectroscopic-determination-of-aerosol-ph-from-acid-base-equilibria-in-inorganic-organic-and-mixed-systems
#18
Rebecca Lynn Craig, Lucy Nandy, Jessica Lynne Axson, Cari S Dutcher, Andrew P Ault
Atmospheric aerosol acidity impacts key multiphase processes, such as acid-catalyzed reactions leading to secondary organic aerosol formation, which impact climate and human health. However, traditional indirect methods of estimating aerosol pH often disagree with thermodynamic model predictions, resulting in aerosol acidity still being poorly understood in the atmosphere. Herein, a recently developed method coupling Raman microspectroscopy with extended Debye-Hückel activity calculations to directly determine the acidity of individual particles was applied to a range of atmospherically-relevant inorganic and organic acid-base equilibria systems (HNO3/NO3-, HC2O4-/C2O42-, CH3COOH/CH3COO-, and HCO3-/CO32-) covering a broad pH range (-1 to 10), as well as an inorganic-organic mixture (sulfate-oxalate)...
July 10, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28689762/a-toxicological-review-of-the-ethylene-glycol-series-commonalities-and-differences-in-toxicity-and-modes-of-action
#19
Jeff Fowles, Marcy Banton, Joanna Klapacz, Hua Shen
This review summarizes the hazards, exposure and risk that are associated with ethylene glycols (EGs) in their intended applications. Ethylene glycol (EG; CAS RN 107-21-1) and its related oligomers include mono-, di-, tri-, tetra-, and penta-EG. All of the EGs are quickly and extensively absorbed following ingestion and inhalation, but not by the dermal route. Metabolism involves oxidation to the mono- and dicarboxylic acids. Elimination is primarily through the urine as the parent compound or the monoacid, and, in the case of EG, also as exhaled carbon dioxide...
July 6, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28689648/clinical-and-genetic-characterization-of-chinese-pediatric-cystine-stone-patients
#20
Luming Shen, Xiaoming Cong, Xin Zhang, Ninghong Wang, Ping Zhou, Yan Xu, Qingyi Zhu, Xiaojian Gu
INTRODUCTION: Cystine stone is the only clinical manifestation in patients with cystinuria, which is an autosomal recessive inheritable disease. However, clinical and genetic data vary among patients in different countries. OBJECTIVE: To investigate the characteristics of Chinese pediatric cystine stone patients. PATIENTS AND METHODS: Thirteen pediatric patients with cystine stones were evaluated in our clinic between 2012 and 2015. Gene mutations in SLC3A1 and SLC7A9 were investigated...
June 24, 2017: Journal of Pediatric Urology
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