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Lanthanum

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https://www.readbyqxmd.com/read/29655922/hydrometallurgical-recovery-of-metals-ce-la-co-fe-mn-ni-and-zn-from-the-stream-of-used-ni-mh-cells
#1
Agnieszka Sobianowska-Turek
The utilization of the stream of waste secondary nickel-metal hydride (Ni-MH) and lithium-ion (Li-ion) cells, representing annually about 33% of all consumer batteries and accumulators placed on the Polish market, will soon become a big challenge for both legislators and plants dealing with the recycling of this type of hazardous waste. It is due to the fact that no company in Poland operating on the market has a complete technology for the processing of a full stream of waste chemical energy sources produced in this country...
April 11, 2018: Waste Management
https://www.readbyqxmd.com/read/29627829/effect-of-lanthanum-carbonate-on-all-cause-mortality-in-patients-receiving-maintenance-hemodialysis-a-meta-analysis-of-randomized-controlled-trials
#2
Fang Wang, Xiangxue Lu, Jingli Zhang, Ruifang Xiong, Han Li, Shixiang Wang
BACKGROUND/AIMS: Hyperphosphatemia is common in patients on hemodialysis. The efficacy of lanthanum carbonate (LC) in the treatment of hyperphosphatemia in these patients remains controversial. The objective of this meta-analysis was to evaluate the effect of LC on all-cause mortality in patients on maintenance hemodialysis. METHODS: We electronically searched the PubMed, EMBASE, and Cochrane Library databases for all randomized controlled trials (RCTs) comparing LC with other phosphate binders used in adult hemodialysis patients, including calcium carbonate, calcium acetate, and sevelamer...
March 29, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29614122/complexes-of-myo-inositol-hexakisphosphate-insp6-with-zinc-or-lanthanum-to-enhance-excretion-of-radioactive-strontium-from-the-body
#3
Kazuma Ogawa, Miho Aoki, Sumi Kadono, Akira Odani
90Sr, which was released into the atmosphere and the ocean following the Chernobyl and Fukushima Daiichi nuclear power plant disasters, is an important nuclear fission element. Compounds that inhibit the absorption of 90Sr into the bloodstream and enhance its elimination can be beneficial in decreasing the absorbed radiation dose in people exposed to 90Sr. Recently, we prepared complexes of myo-inositol-hexakisphosphate (InsP6) with zinc or lanthanum as decorporation agents. These complexes, called Zn-InsP6 and La-InsP6 respectively, are insoluble in water and can potentially chelate additional metal cations...
2018: PloS One
https://www.readbyqxmd.com/read/29614118/effects-of-polyaluminum-chloride-and-lanthanum-modified-bentonite-on-the-growth-rates-of-three-cylindrospermopsis-raciborskii-strains
#4
Fabiana Araújo, Frank van Oosterhout, Vanessa Becker, José Luiz Attayde, Miquel Lürling
In tropical and subtropical lakes, eutrophication often leads to nuisance blooms of Cylindrospermopsis raciborskii. In laboratory experiments, we tested the combined effects of flocculant polyaluminum chloride (PAC) and lanthanum-modified bentonite (LMB) on the sinking and growth rates of three C. raciborskii strains. We tested the hypothesis that the combination of PAC and LMB would (1) effectively sink C. raciborskii in a test tube experiment and (2) impair C. raciborskii growth, irrespective of the biomass of the inoculum (bloom) and the strain in the growth experiment...
2018: PloS One
https://www.readbyqxmd.com/read/29611208/the-effect-of-on-line-hemodiafiltration-vegetarian-diet-and-urine-volume-on-advanced-glycosylation-end-products-measured-by-changes-in-skin-auto-fluorescence
#5
Arkom Nongnuch, Andrew Davenport
Increasing urea clearance by hemodialysis (HD) has not improved patient survival. Hemodiafiltration (HDF) has been reported to reduce cardiovascular mortality. HDF increases middle sized solute clearances. Advanced glycosylation end products (AGEs) are associated with increased cardiovascular mortality. We wished to determine whether HDF reduces AGEs. Skin auto-fluorescence (SAF) measures circulating AGEs deposited in the skin. We compared SAF measurements 12 months apart in high flux HD and HDF patients. At enrollment SAF was not different (HD 3...
April 2, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29607640/ligand-enhanced-co-activation-by-the-early-lanthanide-nickel-heterodimers-photoelectron-velocity-map-imaging-spectroscopy-of-lnni-co-n-ln-la-ce
#6
Gang Li, Jumei Zhang, Hua Xie, Xiangtao Kong, Ling Jiang
Heterobimetallic lanthanum-nickel and cerium-nickel carbonyls, LnNi(CO)n- (Ln = La, Ce; n = 2-5), were generated using a laser-vaporization supersonic cluster source in the gas phase. These compounds were mass-selected and characterized by photoelectron velocity-map imaging spectroscopy and quantum chemical calculations. The binding motif in the most stable isomers of the n = 2 and 3 clusters consists of one side-on-bonded carbonyl. A new building block of two side-on-bonded carbonyls is favored is favored at n = 4, which is retained at n = 5, evidencing the increase of the number of extremely activated CO molecule in the larger clusters...
April 2, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29603356/gastrointestinal-lanthanum-phosphate-deposition-in-the-gastroduodenal-mucosa-an-unusual-cause-of-epigastric-discomfort
#7
Y Eso, M Yoshioka, H Seno
No abstract text is available yet for this article.
March 30, 2018: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29574391/a-novel-evaluation-of-the-effect-of-lanthanum-exposure-on-plant-populations
#8
Fan Zhang, Yihang Li, Yu Shi, Lihong Wang, Qing Zhou, Xiaohua Huang
The accumulation of rare earth elements (REEs) in the environment has recently become a new environmental problem. There have been many studies about the effects of REEs on plant at the individual, organ, cellular and genetic levels. Plants exist in populations under natural conditions, but little is known about the effects of REEs on plant populations. In this study, the effects of lanthanum (III) [La(III)] on the root module growth of soybean (Glycine max L) populations at different densities were investigated by simulating La(III) pollution...
March 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/29569165/theoretical-study-of-the-electronic-structure-of-mono-chloride-of-lanthanum-molecule-including-spin-orbit-coupling-effect
#9
Yaman Hamade, Ahmad El Sobbahi
Our investigation is devoted to the theoretical study of the low-lying electronic structure of the LaCl molecule by using ab initio quantum methods. We are concerned with several methods such as the complete active space-self consistent field (CAS-SCF) and the multi reference of configuration interaction (MRCI + Q) methods. These methods are applied for the purpose of drawing the potential energy curves (PECs) and calculating the molecular spectroscopic constants for a given number of electronic states of singlet and triplet multiplicity...
March 22, 2018: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29566839/cost-effectiveness-of-first-line-sevelamer-and-lanthanum-versus-calcium-based-binders-for-hyperphosphatemia-of-chronic-kidney-disease
#10
Steven Habbous, Sebastian Przech, Janet Martin, Amit X Garg, Sisira Sarma
BACKGROUND: Phosphate binders are used to treat hyperphosphatemia among patients with chronic kidney disease (CKD). OBJECTIVES: To conduct an economic evaluation comparing calcium-free binders sevelamer and lanthanum with calcium-based binders for patients with CKD. METHODS: Effectiveness data were obtained from a recent meta-analysis of randomized trials. Effectiveness was measured as life-years gained and translated to quality-adjusted life-years (QALYs) using utility weights from the literature...
March 2018: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/29561149/lanthanum-complexes-with-a-diimine-ligand-in-three-different-redox-states
#11
Igor L Fedushkin, Anton N Lukoyanov, Evgeny V Baranov
The reduction of 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-Bian) with an excess of La metal in the presence of iodine (dpp-Bian/I2 = 2/1) in tetrahydrofuran (thf) or dimethoxyethane (dme) affords lanthanum(III) complexes of dpp-Bian dianion: deep blue [(dpp-Bian)2- LaI(thf)2 ]2 (1, 84%) was isolated by crystallization of the product from hexane, while deep green [(dpp-Bian)LaI(dme)2 ] (2, 93%) precipitated from the reaction mixture in the course of its synthesis. A treatment of complex 1 with 0...
March 21, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29560595/performance-and-mechanism-of-fluoride-adsorption-from-groundwater-by-lanthanum-modified-pomelo-peel-biochar
#12
Jianguo Wang, Nan Chen, Chuanping Feng, Miao Li
To obtain an economical and effective adsorbent for fluoride removal, lanthanum-loaded pomelo peel biochar (PPBC-La) was synthesized using a facile approach. The batch adsorption experiments were investigated to determine adsorbent performance. The PPBC-La and its pristine biochar (PPBC) were characterized by scanning electronic microscopy (SEM), zeta potential, Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) methods. Experimental results showed that the adsorption data were described well by the pseudo-second-order kinetic and Freundlich isotherm models...
March 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29555594/ultrastructural-alteration-of-pulmonary-capillary-endothelial-glycocalyx-during-endotoxemia
#13
Risa Inagawa, Hideshi Okada, Genzou Takemura, Kodai Suzuki, Chihiro Takada, Hirohisa Yano, Yoshiaki Ando, Takahiro Usui, Yasuaki Hotta, Nagisa Miyazaki, Akiko Tsujimoto, Ryogen Zaikokuji, Atsumu Matsumoto, Tomonori Kawaguchi, Tomoaki Doi, Takahiro Yoshida, Shozo Yoshida, Keisuke Kumada, Hiroaki Ushikoshi, Izumi Toyoda, Shinji Ogura
BACKGROUND: The most recent diagnostic criteria for sepsis includes organ failure. Microvascular endothelial injury is thought to lead to the multiple organ failure seen in sepsis, although the precise mechanism is still controversial. Acute respiratory distress syndrome (ARDS) is the primary complication during the sequential development of multiple organ dysfunction in sepsis, and endothelial injury is deeply involved. Sugar-protein glycocalyx coats all healthy vascular endothelium, and its disruption is one factor thought to contribute to microvascular endothelial dysfunction during sepsis...
March 16, 2018: Chest
https://www.readbyqxmd.com/read/29554599/catalytic-upgrading-of-pyrolysis-vapor-from-rape-straw-in-a-vacuum-pyrolysis-system-over-la-hzsm-5-with-hierarchical-structure
#14
Xiaohua Li, Xiaolei Zhang, Shanshan Shao, Liangxiu Dong, Jin Zhang, Chao Hu, Yixi Cai
Catalytic upgrading of pyrolysis vapor from rape straw was performed in a vacuum pyrolysis system over La/HZSM-5 with hierarchical structure. When 3M Na2 CO3 was used for alkali treatment, the desilication process of HZSM-5 zeolite was highly controllable and the hierarchical porous HZSM-5(Hi-ZSM-5) zeolite was formed. After that, Hi-ZSM-5 was modified by impregnation with lanthanum ion, the acid sites of Lewis increased and the concentrations ratio of Brönsted acid and Lewis acid of the catalyst was improved...
March 14, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29550253/the-rare-earth-element-ree-lanthanum-la-induces-hormesis-in-plants
#15
EDITORIAL
Evgenios Agathokleous, Mitsutoshi Kitao, Edward J Calabrese
Lanthanum is a rare earth element (REE) which has been extensively studied due to its wide application in numerous fields with a potential accumulation in the environment. It has long been known for its potential to stimulate plant growth within a hormetic-biphasic dose response framework. This article provides evidence from a series of high resolution studies published within the last two decades demonstrating a substantial and significant occurrence of lanthanum-induced hormesis in plants. These findings suggest that hormetic responses should be built into the study design of hazard assessment study protocols and included in the risk assessment process...
March 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29549799/lanthanum-modified-drinking-water-treatment-residue-for-initial-rapid-and-long-term-equilibrium-phosphorus-immobilization-to-control-eutrophication
#16
Changhui Wang, Yu Wu, Youquan Wang, Leilei Bai, Helong Jiang, Juhua Yu
This study presents an approach for developing inactivating materials to achieve an initial rapid and a long-term equilibrium P immobilization to control eutrophication based on drinking water treatment residue (DWTR), which is a byproduct of potable water production. By taking advantage of the long-term equilibrium P adsorption by DWTR, the La chemical properties, and the previous success of using La-modified bentonite clay (Phoslock® ), we used DWTR as a La carrier with different ratios to develop the specific materials...
March 9, 2018: Water Research
https://www.readbyqxmd.com/read/29536389/rationale-design-and-characteristics-of-a-trial-to-evaluate-the-new-phosphate-iron-based-binder-sucroferric-oxyhydroxide-in-dialysis-patients-with-the-goal-of-advancing-the-practice-of-e-b-m-episode
#17
Yoshitaka Isaka, Hideki Fujii, Yoshihiro Tsujimoto, Satoshi Teramukai, Takayuki Hamano
BACKGROUND: In dialysis patients, mortality risk due to cardiovascular diseases is remarkably high and prognosis is poor; coronary artery calcification is considered one of the major contributing factors. It is known that hyperphosphatemia is associated with coronary artery calcification. Therefore, controlling serum phosphate level and thereby mitigating vascular calcification could improve the poor prognosis of dialysis patients. However, the optimal phosphate level in dialysis patients remains unknown; hence, this study was planned to compare the effects of two types of non-calcium-based phosphate binders, and examine the effect of strict control of phosphate on coronary artery calcification...
March 13, 2018: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29531283/interfacial-phenomenon-and-nanostructural-enhancements-in-palladium-loaded-lanthanum-hydroxide-nanorods-for-heterogeneous-catalytic-applications
#18
Ammar Bin Yousaf, Muhammad Imran, Muhammad Farooq, Peter Kasak
Hydrogenation and cross-coupling reactions are of great importance for industrial applications and noble metal based catalysts are filling the void since the last few decades. However, the high cost of noble metals and poor recycling performance provides an opportunity for chemists to look for alternate options. Herein, we present the use of Lanthanum hydroxide as support for loading ultra-low amount of Pd for hydrogenation and cross-coupling reactions. Lanthanum hydroxide having controlled morphologies comprises exposed crystallographic facets which interact with small sized Pd NPs and shows versatile and effective catalytic performance...
March 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29529437/determination-of-metal-based-nanoparticles-in-the-river-dommel-in-the-netherlands-via-ultrafiltration-hr-icp-ms-and-sem
#19
A A Markus, P Krystek, P C Tromp, J R Parsons, E W M Roex, P de Voogt, R W P M Laane
We investigated the occurrence of metal-based nanoparticles in a natural system, the river Dommel in the Netherlands. The river itself is well-studied as far as hydrology and water quality is concerned, easily accessible and contains one major wastewater treatment plant discharging onto this river. We sampled water from various locations along the river and collected samples of influent, effluent and sewage sludge from the wastewater treatment plant. The sampling campaign was carried out in June 2015 and these samples were analysed for seven elements using high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS), ultrafiltration with a sequence of mesh sizes and scanning electron microscopy (SEM)...
March 9, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29498834/lanthanide-texaphyrins-as-photocatalysts
#20
Aaron D Lammer, Grégory Thiabaud, James T Brewster, Julie Alaniz, Jon A Bender, Jonathan L Sessler
Here, we report the use of gadolinium(III)-, lutetium(III)-, and lanthanum(III)-texaphyrins as bioinspired photocatalysts that promote a novel approach to the degradation of curcumin, a 1,3-diketo-containing natural product. Complexation of curcumin to the lanthanide centers of the texaphyrins yields stable species that display limited reactivity in the dark or under anaerobic conditions. However, upon exposure to mWatt intensity light (pocket flashlight) or simply under standard laboratory illumination in the presence of atmospheric oxygen, substrate oxidation occurs readily to generate curcumin-derived cleavage products...
March 2, 2018: Inorganic Chemistry
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