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lanthanum carbonate

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https://www.readbyqxmd.com/read/29768862/wrinkled-mesoporous-silica-supported-lanthanum-oxide-as-a-template-for-porous-carbon
#1
Zijie Wang, Sahila Perananthan, Samitha D Panangala, John P Ferraris, Kenneth J Balkus
Wrinkled mesoporous silica (WMS) has been shown to be a promising material for catalysis and drug delivery. The WMS possesses a unique wrinkled structure with conical shaped pores radiating from the center to the surface of each particle. Lanthanum oxide was supported on wrinkled mesoporous silica as a hard template for the synthesis of graphitic carbon. The resulting carbon material retains the unique wrinkled structure and has high surface area (∼879 m2/g) as well as graphitic walls which were observed by transmission electron microscopy...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29755426/comparative-genomics-and-mutational-analysis-reveals-a-novel-xoxf-utilizing-methylotroph-in-the-roseobacter-group-isolated-from-the-marine-environment
#2
Alexandra M Howat, John Vollmers, Martin Taubert, Carolina Grob, Joanna L Dixon, Jonathan D Todd, Yin Chen, Anne-Kristin Kaster, J C Murrell
The Roseobacter group comprises a significant group of marine bacteria which are involved in global carbon and sulfur cycles. Some members are methylotrophs, using one-carbon compounds as a carbon and energy source. It has recently been shown that methylotrophs generally require a rare earth element when using the methanol dehydrogenase enzyme XoxF for growth on methanol. Addition of lanthanum to methanol enrichments of coastal seawater facilitated the isolation of a novel methylotroph in the Roseobacter group: Marinibacterium anthonyi strain La 6...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29748907/effect-of-combined-vitamin-d-receptor-activator-and-lanthanum-carbonate-on-serum-fibroblast-growth-factor-23-level-in-predialysis-patients-cvd-laf-study-design-and-method
#3
Eri Ito, Daijo Inaguma, Shigehisa Koide, Kazuo Takahashi, Hiroki Hayashi, Midori Hasegawa, Yukio Yuzawa
BACKGROUND: Whether vitamin D receptor activator (VDRA) use is beneficial in chronic kidney disease (CKD) is unclear, because it is possible that VDRA increases serum fibroblast growth factor 23 (FGF23) levels. We will conduct a randomized controlled trial in predialysis patients to determine the effect of VDRA alone or in combination with lanthanum carbonate (LC) on serum FGF23 levels. METHODS: This is a single-center, open-label, randomized controlled trial. Enrollment will commence February 1, 2018, using the following inclusion criteria: (1) age ≥ 20 years, (2) CKD with an estimated glomerular filtration rate of 10-45 mL/min/1...
May 10, 2018: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29680603/a-new-analytical-device-incorporating-a-nitrogen-doped-lanthanum-metal-oxide-with-reduced-graphene-oxide-sheets-for-paracetamol-sensing
#4
Sathish Kumar Ponnaiah, Periakaruppan Prakash, Balakumar Vellaichamy
The novel N-CeO2 nanoparticles decorated on reduced graphene oxide (N-CeO2 @rGO) composite has been synthesized by sonochemical method. The characterization of as prepared nanocomposite was intensely performed by UV-Vis, FT-IR, EDX, FE-SEM, HR-TEM, XRD, and TGA analysis. The synthesized nanomaterial was further investigated for its selective and sensitive sensing of paracetamol (PM) based on a N-CeO2 @rGO modified glassy carbon electrode. A distinct and improved reversible redox peak of PM is obtained at N-CeO2 @rGO nanocomposite compared to the electrodes modified with N-CeO2 and rGO...
June 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29672760/nutritional-status-and-survival-of-maintenance-hemodialysis-patients-receiving-lanthanum-carbonate
#5
Hirotaka Komaba, Takatoshi Kakuta, Takehiko Wada, Miho Hida, Takao Suga, Masafumi Fukagawa
Background: Hyperphosphatemia and poor nutritional status are associated with increased mortality. Lanthanum carbonate is an effective, calcium-free phosphate binder, but little is known about the long-term impact on mineral metabolism, nutritional status and survival. Methods: We extended the follow-up period of a historical cohort of 2292 maintenance hemodialysis patients that was formed in late 2008. We examined 7-year all-cause mortality according to the serum phosphate levels and nutritional indicators in the entire cohort and then compared the mortality rate of the 562 patients who initiated lanthanum with that of the 562 propensity score-matched patients who were not treated with lanthanum...
April 16, 2018: Nephrology, Dialysis, Transplantation
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
#6
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/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
#7
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/29479762/influence-of-ph-and-phosphate-concentration-on-the-phosphate-binding-capacity-of-five-contemporary-binders-an-in-vitro-study
#8
Stefan P Schumacher, Leon J Schurgers, Marc G Vervloet, Aegida Neradova
AIM: Hyperphosphataemia is associated with increased mortality and morbidity in end stage renal disease. Despite phosphate binder therapy, a large proportion of patients do not reach the treatment target. In five contemporary binders we explored the influence of pH and phosphate concentration on phosphate binding. This interaction could be of relevance in clinical practice. METHODS: Phosphate binding was quantified in vitro in 25 mL of purified water containing phosphate concentrations of 10, 15 and 20 mM and baseline pH values of 3...
February 26, 2018: Nephrology
https://www.readbyqxmd.com/read/29390854/lanthanum-mediated-dehydrogenation-of-butenes-spectroscopy-and-formation-of-la-c-4-h-6-isomers
#9
Wenjin Cao, Dilrukshi Hewage, Dong-Sheng Yang
La atom reactions with 1-butene, 2-butene, and isobutene are carried out in a laser-vaporization molecular beam source. The three reactions yield the same La-hydrocarbon products from the dehydrogenation and carbon-carbon bond cleavage and coupling of the butenes. The dehydrogenated species La(C4 H6 ) is the major product, which is characterized with mass-analyzed threshold ionization (MATI) spectroscopy and quantum chemical computations. The MATI spectrum of La(C4 H6 ) produced from the La+1-butene reaction exhibits two band systems, whereas the MATI spectra produced from the La+2-butene and isobutene reactions display only a single band system...
January 28, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29339621/highly-enhanced-adsorption-of-congo-red-by-functionalized-finger-citron-leaf-based-porous-carbon
#10
Gui-Hua Zhao, Yao-Yao Fang, Wei Dai, Na Ma
A novel high-performance porous carbon material, lanthanum(III)-doped finger-citron-leaf-based porous carbon (La/FPC), has been synthesized and used as an adsorbent for anion dye Congo red (CR). The La/FPC was characterized by nitrogen adsorption and desorption isotherms, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The adsorption performance of CR by the FPC and La/FPC composites with different contents of lanthanum(III) were evaluated in fixed-bed breakthrough experiments and batch tests at room temperature (298 K)...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29302869/lanthanum-induced-mucosal-alterations-in-the-stomach-lanthanum-gastropathy-a-comparative-study-using-an-animal-model
#11
Kei Yabuki, Joji Haratake, Yojiro Tsuda, Eisuke Shiba, Hiroshi Harada, Kenji Yorita, Kazuyoshi Uchihashi, Atsuji Matsuyama, Keiji Hirata, Masanori Hisaoka
Lanthanum (La) carbonate (LC) is one of the most potent phosphate binders that prevents the elevation of serum phosphate levels in patients with end-stage renal diseases undergoing dialysis. LC binds strongly to dietary phosphate and forms insoluble complexes that pass through the gastrointestinal tract. La deposition in patients treated with LC is a recently documented finding particularly observed in gastric mucosa. We herein describe the detailed gastric mucosal lesions in 45 LC-treated patients and address the potential underlying pathologic mechanism using oral LC administration in rats...
January 4, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29178399/cascade-production-of-lactic-acid-from-universal-types-of-sugars-catalyzed-by-lanthanum-triflate
#12
Dajiang Liu, Kwang Ho Kim, Jian Sun, Blake A Simmons, Seema Singh
Lignocellulosic biomass conversion into value-added platform chemicals in the non-toxic, water-tolerant Lewis acid, and water solutions bears the hallmark of green chemistry. Lactic acid derived from biomass is an important chemical building block for biodegradable polymers such as polylactide. Herein, a universal method of converting lignocellulosic sugars into lactic acid using catalytic amount of water-stable Lewis acid La(OTf)3 is demonstrated. The lignocellulosic sugars studied in this work include 1) pyrolytic sugars from pyrolysis oil, and 2) sugars derived from ionic liquid (IL)-pretreated biomass...
February 9, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29137107/effect-of-lanthanum-carbonate-on-coronary-artery-calcification-and-bone-mineral-density-in-maintenance-hemodialysis-patients-with-diabetes-complicated-with-adynamic-bone-disease-a-prospective-pilot-study
#13
RANDOMIZED CONTROLLED TRIAL
Chunhua Zhang, Shixiang Wang, Sumei Zhao, Xiaodong Zhang
BACKGROUND: The incidence of adynamic bone disease (ABD) is increasing. Coronary artery calcification (CAC) may be severe in patients with ABD on maintenance hemodialysis (MHD). The aim of this study was to evaluate the effect of lanthanum carbonate (LC) on CAC and bone mineral density (BMD) in MHD patients with diabetes complicated with ABD. METHODS: A total of 92 MHD cases were divided into the calcium carbonate (CC) and LC groups. Primary outcome measure was the changes in the degree of CAC score (CACS) and BMD in forearm from baseline to 12 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29058057/effects-of-lanthanum-carbonate-on-coronary-artery-calcification-and-cardiac-abnormalities-after-initiating-hemodialysis
#14
Hideki Fujii, Keiji Kono, Kentaro Nakai, Shunsuke Goto, Tatsuya Nishii, Atsushi Kono, Shinichi Nishi
It is known that calcium-containing phosphate binders are more closely associated with the progression of vascular calcification than non-calcium-containing phosphate binders. In this study, we investigated the effect of the non-calcium-containing phosphate binder, lanthanum carbonate on the progression of coronary artery calcification and cardiovascular abnormalities compared to that of calcium-containing phosphate binder in chronic kidney disease patients during the early period after initiating hemodialysis...
March 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/28976178/thermally-stable-and-electrically-conductive-vertically-aligned-carbon-nanotube-silicon-infiltrated-composite-structures-for-high-temperature-electrodes
#15
Qi Ming Zou, Lei Min Deng, Da Wei Li, Yun Shen Zhou, Hossein Rabiee Golgir, Kamran Keramatnejad, Li Sha Fan, Lan Jiang, Jean-Francois Silvain, Yong Feng Lu
Traditional ceramic-based, high-temperature electrode materials (e.g., lanthanum chromate) are severely limited due to their conditional electrical conductivity and poor stability under harsh circumstances. Advanced composite structures based on vertically aligned carbon nanotubes (VACNTs) and high-temperature ceramics are expected to address this grand challenge, in which ceramic serves as a shielding layer protecting the VACNTs from the oxidation and erosive environment, while the VACNTs work as a conductor...
October 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28948987/on-the-interfacial-charge-transfer-between-solid-and-liquid-li-electrolytes
#16
Marco Schleutker, Jochen Bahner, Chih-Long Tsai, Detlef Stolten, Carsten Korte
The Li+ ion transfer between a solid and a liquid Li+ electrolyte has been investigated by DC polarisation techniques. The current density i is measured as a function of the electrochemical potential drop Δ[small mu, Greek, tilde]Li+ at the interface, using a liquid electrolyte with different Li+ concentrations. The subject of this experimental study is the interface between the solid electrolyte Ta-substituted lithium lanthanum zirconate (Li6.6 La3 Zr1.6 Ta0.4 O12 ) and a liquid electrolyte consisting of LiPF6 dissolved in ethylene carbonate/dimethyl carbonate (1 : 1)...
October 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28904356/extremely-high-electrical-conductance-of-microporous-3d-graphene-like-zeolite-templated-carbon-framework
#17
Hyunsoo Lee, Kyoungsoo Kim, Seoung-Hun Kang, Yonghyun Kwon, Jong Hun Kim, Young-Kyun Kwon, Ryong Ryoo, Jeong Young Park
We report the remarkably high electrical conductance of microporous 3D graphene-like carbons that were formed using lanthanum (La)-catalyzed synthesis in a Y zeolite (LaY) template investigated using conductive atomic force microscopy (C-AFM) and theoretical calculations. To uncover the relation between local electrical conductance and the microporous structures, we tuned the crystallographic ordering of LaY-templated carbon systems by changing the heating temperature. The structure of the LaY-templated carbon prepared at the higher temperature has graphene-like sp (2) hybridized bonds, which was confirmed using high-resolution transmission electron microscopy and X-ray diffraction measurements...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810759/lanthanum-mediated-dehydrogenation-of-1-and-2-butynes-spectroscopy-and-formation-of-la-c4h4-isomers
#18
Wenjin Cao, Dilrukshi Hewage, Dong-Sheng Yang
La atom reactions with 1-butyne and 2-butyne are carried out in a laser-vaporization molecular beam source. Both reactions yield the same La-hydrocarbon products from the dehydrogenation and carbon-carbon bond cleavage and coupling of the butynes. The dehydrogenated species La(C4H4) is characterized with mass-analyzed threshold ionization (MATI) spectroscopy and quantum chemical computations. The MATI spectra of La(C4H4) produced from the two reactions exhibit two identical transitions, each consisting of a strong origin band and several vibrational intervals...
August 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28799264/correlation-of-lanthanum-dosage-with-lanthanum-deposition-in-the-gastroduodenal-mucosa-of-dialysis-patients
#19
Kimiaki Hattori, Tamaki Maeda, Shinya Nishida, Miyuki Imanishi, Masahiro Sakaguchi, Yoshifumi Amari, Takuya Moriya, Yoshinobu Hirose
Lanthanum (La) deposition has been observed in gastrointestinal mucosa of dialysis patients treated with La carbonate to treat hyperphosphatemia in the 6 years since its authorization in Japan. We investigated gastrointestinal biopsies from 112 dialysis patients, and found 15 cases of histiocytic aggregation with crystalloids and one case of duodenitis with histiocyte aggregation without crystalloids in the 30 patients treated with La carbonate. No histiocytic lesions were observed in the 82 patients without La carbonate administration...
August 11, 2017: Pathology International
https://www.readbyqxmd.com/read/28781325/clinical-characteristics-of-seven-patients-with-lanthanum-phosphate-deposition-in-the-stomach
#20
Naoko Murakami, Masao Yoshioka, Masaya Iwamuro, Junichirou Nasu, Soichiro Nose, Junji Shiode, Hiroyuki Okada, Kazuhide Yamamoto
Objective To analyze the clinical characteristics and endoscopic features of patients with lanthanum deposition in the stomach. Patients We retrospectively reviewed seven patients with lanthanum deposition in the stomach who were diagnosed at Okayama Saiseikai General Hospital. We investigated the patient sex, age at diagnosis, medical and medication histories, gastrointestinal symptoms, complications, presence or absence of gastric atrophy, and outcome. We also investigated any changes in the endoscopic features if previous endoscopic images were available...
August 15, 2017: Internal Medicine
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