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https://www.readbyqxmd.com/read/27900384/3d-oxalato-bridged-lanthanide-iii-mofs-with-magnetocaloric-magnetic-and-photoluminescence-properties
#1
Muhammad Nadeem Akhtar, Yan-Cong Chen, Murad A AlDamen, Ming-Liang Tong
Four isostructural 3D lanthanide(iii) metal-organic frameworks with the general formula (H6edte)0.5[Ln(III)(ox)2(H2O)] (Ln = Gd (1), Tb (2), Dy (3) and Ho (4); H4edte = N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine) and ox = oxalate have been synthesized from oxalate. These compounds were characterized using single-crystal X-ray diffraction, FTIR and TGA/DTG. The magnetic investigation has been performed for 1-4 and the results reveal that a Gd(iii) containing MOF has the highest magnetic density and exhibits a larger cryogenic magnetocaloric effect (ΔSm = 35...
November 30, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27836863/checkpoint-proteins-in-pediatric-brain-and-extracranial-solid-tumors-opportunities-for-immunotherapy
#2
Eric K Ring, James M Markert, G Yancey Gillespie, Gregory K Friedman
Pediatric brain and extracranial solid tumors are a diverse group of malignancies that represent almost half of pediatric cancers. Standard therapy includes various combinations of surgery, cytotoxic chemotherapy and radiation, which can be very harmful to a developing child, and survivors carry a substantial burden of long term morbidities. While these therapies have improved survival rates for children with solid tumors, outcomes still remain extremely poor for subsets of patients. Recently, immunosuppressive checkpoint molecules that negatively regulate immune cell function have been described...
November 10, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27726354/peptide-directed-assembly-of-single-helical-gold-nanoparticle-superstructures-exhibiting-intense-chiroptical-activity
#3
Andrea D Merg, Jennifer C Boatz, Abhishek Mandal, Gongpu Zhao, Soumitra Mokashi-Punekar, Chong Liu, Xianting Wang, Peijun Zhang, Patrick C A van der Wel, Nathaniel L Rosi
Chiral nanoparticle assemblies are an interesting class of materials whose chiroptical properties make them attractive for a variety of applications. Here, C18-(PEPAu(M-ox))2 (PEPAu(M-ox) = AYSSGAPPM(ox)PPF) is shown to direct the assembly of single-helical gold nanoparticle superstructures that exhibit exceptionally strong chiroptical activity at the plasmon frequency with absolute g-factor values up to 0.04. Transmission electron microscopy (TEM) and cryogenic electron tomography (cryo-ET) results indicate that the single helices have a periodic pitch of approximately 100 nm and consist of oblong gold nanoparticles...
October 11, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27602984/proton-conduction-via-lattice-water-molecules-in-oxalato-bridged-lanthanide-porous-coordination-polymers
#4
Ryuta Ishikawa, Shunya Ueno, Sadahiro Yagishita, Hitoshi Kumagai, Brian K Breedlove, Satoshi Kawata
The proton conducting properties of two different structural types of porous coordination polymers [La2(ox)3(H2O)6]·4H2O (1) and [Er2(ox)3(H2O)6]·12H2O (2), where ox(2-) = oxalate, were investigated. 1 has a two-dimensional layered structure, whereas 2 has a three-dimensional structure. Both 1 and 2 have hydrophilic one-dimensional channels filled by lattice water molecules with hydrogen-bonding networks. The coordinated H2O molecules are Lewis acidic due to the lanthanoid ions donating protons to lattice-filling H2O molecules, thereby forming efficient proton conduction pathways...
October 21, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27183342/silver-i-complexes-with-a-p-n-hybrid-ligand-and-oxyanions-synthesis-structures-photocatalysis-and-photocurrent-responses
#5
Jian-Feng Wang, Shi-Yuan Liu, Chun-Yu Liu, Zhi-Gang Ren, Jian-Ping Lang
Reactions of a P-N hybrid ligand, N,N-bis(diphenylphosphanylmethyl)-3-aminopyridine (3-bdppmapy), with silver oxysalts including AgNO3, AgOAc, AgBz (Bz = benzoate) and AgSal (Sal = salicylate) under different reaction conditions give rise to seven coordination compounds {[Ag4(μ-η,η-NO3)2(μ-η,η(2)-NO3)2](3-bdppmapy)2}n (1), {[Ag4(μ-η,η(2)-NO3)4](3-bdppmapy)2}n (2), {[Ag2(μ-η(2)-OAc)(μ-η,η(2)-OAc)]2(3-bdppmapy)2}n (3), [Ag2(Bz)(μ-η,η(2)-Bz)(H2O)]2(3-bdppmapy)2 (4), {[Ag4(μ-η(2)-Bz)2(μ-η,η(2)-Bz)2](3-bdppmapy)2}n (5), {Ag(Sal)(3-bdppmapy)}n (6) and {[Ag4(Sal)2(μ-η,η(2)-Sal)2](3-bdppmapy)2}n (7)...
June 14, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27180839/oxalate-assisted-oxidative-degradation-of-4-chlorophenol-in-a-bimetallic-zero-valent-iron-aluminum-air-water-system
#6
Jinhong Fan, Hongwu Wang, Luming Ma
The reaction of zero-valent iron and aluminum with oxygen produced reactive oxidants that can oxidize 4-chlorophenol (4-CP). However, oxidant yield without metal surface cleaning to dissolve the native oxide layer or in the absence of ligands was too low for practical applications. The addition of oxalate (ox) to dissolved oxygen-saturated solution of Fe(0)-Al(0) significantly increased oxidant yield because of the dissolution, pH buffer, and complexing characteristics of ox. Ox-enhanced reactive oxidant generation was affected by ox concentration and solution pH...
August 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/26910908/low-expression-of-cd200-predicts-shorter-time-to-treatment-in-chronic-lymphocytic-leukemia
#7
Yi Miao, Lei Fan, Yu-Jie Wu, Yi Xia, Chun Qiao, Yan Wang, Li Wang, Min Hong, Hua-Yuan Zhu, Wei Xu, Jian-Yong Li
CD200, formerly known as OX-2, is a type I glycoprotein that is expressed on a variety of cell types. CD200 has been shown to be overexpressed in chronic lymphocytic leukemia (CLL). Although previous studies have confirmed the diagnostic value of CD200 in differentiating CLL from to other B-cell chronic lymphoproliferative disorders especially mantle cell lymphoma, whether CD200 has prognostic significance in CLL remains to be determined. We evaluated the mean fluorescence intensity (MFI) of CD200 in 307 consecutive, untreated patients with CLL in our center using flow cytometry...
March 22, 2016: Oncotarget
https://www.readbyqxmd.com/read/26388952/the-impact-of-long-term-changes-in-metabolic-status-on-cardiovascular-biomarkers-and-microvascular-endothelial-function-in-middle-aged-men-a-25-year-prospective-study
#8
Magdalena Kwaśniewska, Joanna Kozińska, Elżbieta Dziankowska-Zaborszczyk, Tomasz Kostka, Anna Jegier, Ewa Rębowska, Milena Orczykowska, Joanna Leszczyńska, Wojciech Drygas
BACKGROUND: The aim of this analysis was to examine long-term effects of changes in metabolic status on microvascular endothelial function and cardiovascular diseases (CVD) biomarkers among physically active middle-aged men. METHODS: Metabolically healthy men (n = 101, mean age 59.7 years), free of symptoms and treatment, have been prospectively observed for their lifestyle and CVD risk factors (observation period 24.7 years). At the latest follow-up (2011/2012) a set of CVD biomarkers was measured using enzyme-linked immunosorbent assay...
2015: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/26388392/preparation-of-poly-3-4-ethylenedioxythiophene-nanofibers-modified-pencil-graphite-electrode-and-investigation-of-over-oxidation-conditions-for-the-selective-and-sensitive-determination-of-uric-acid-in-body-fluids
#9
Ali Özcan, Salih İlkbaş
In this study, we have performed the preparation of over-oxidized poly(3,4-ethylenedioxythiophene) nanofibers modified pencil graphite electrode (Ox-PEDOT-nf/PGE) to develop a selective and sensitive voltammetric uric acid (UA) sensor. It was noted that the over-oxidation potential and time had a prominent effect on the UA response of the Ox-PEDOT-nf/PGE. Characterizations of PEDOT-nf/PGE and Ox-PEDOT-nf/PGE have been performed by cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and Raman spectroscopy...
September 3, 2015: Analytica Chimica Acta
https://www.readbyqxmd.com/read/26372212/usefulness-of-antibodies-to-oxidized-low-density-lipoproteins-as-predictors-of-morbidity-and-prognosis-in-heart-failure-patients-aged-%C3%A2-65%C3%A2-years
#10
Gideon Charach, Yoav Michowitz, Ori Rogowski, Lior Charach, Ori Argov, Jacob George, Itamar Grosskopf
Elevated level of antibodies to oxidized low-density lipoproteins (OxLDL-Ab) was shown to reliably predict morbidity and mortality in patients with heart failure (HF). Two hundred and eleven patients aged ≥65 years treated at the Heart Failure Unit, Tel Aviv-Sourasky Medical Center, were included in this retrospective study. The end points were time to the first hospitalization (morbidity), all-cause mortality, and a combination of the two (composite outcome). HF duration ranged from 8 to 10.5 years. Mean follow-up was 5...
November 1, 2015: American Journal of Cardiology
https://www.readbyqxmd.com/read/26369896/synthesis-crystal-structure-and-magnetic-properties-of-h2tppz-recl6-and-cu-bpzm-2-%C3%AE-cl-recl3-%C3%AE-ox-cu-bpzm-2-%C3%AE-ox-recl3-%C3%AE-cl-n
#11
I Gryca, J Palion-Gazda, B Machura, M Penkala, R Kruszyński, J Cano, F Lloret, M Julve
Two new Re(iv) compounds of formulae H2tppz[ReCl6] (1) and [Cu(bpzm)2(μ-Cl)ReCl3(μ-ox)Cu(bpzm)2(μ-ox)ReCl3(μ-Cl)]n (2) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and bpzm = bis(pyrazolyl-1-yl)methane] have been prepared and their crystal structures determined by X-ray diffraction on single crystals. Compound 1 is a mononuclear species whose structure consists of octahedral hexachlororhenate(iv) anions and diprotonated H2tppz(2+) cations which are arranged in the unit cell as alternating anionic and cationic layers, held together by electrostatic forces...
October 21, 2015: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/26365458/impairment-of-intradimensional-shift-in-an-attentional-set-shifting-task-in-rats-with-chronic-bilateral-common-carotid-artery-occlusion
#12
Dong-Hee Kim, Bo-Ryoung Choi, Won Kyung Jeon, Jung-Soo Han
Studies of rats with chronic bilateral common carotid artery occlusion (BCCAo), an animal model for vascular dementia (VaD), have reported hippocampus-dependent memory impairment and associated neuropathologies. Patients with VaD also experience attentional shifting dysfunction. However, animal models of VaD have not been used to study attentional function. Therefore, the present study examined attentional function in rats with BCCAo, using attentional set-shifting task (ASST) that required rats to choose a food-baited pot from 2 possible pots...
January 1, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/26354027/microwave-assisted-syntheses-in-recyclable-ionic-liquids-photoresists-based-on-renewable-resources
#13
Charlotte Petit, Klaus P Luef, Matthias Edler, Thomas Griesser, Jennifer M Kremsner, Alexander Stadler, Bruno Grassl, Stéphanie Reynaud, Frank Wiesbrock
The copoly(2-oxazoline) pNonOx80 -stat-pDc(=) Ox20 can be synthesized from the cationic ring-opening copolymerization of 2-nonyl-2-oxazoline NonOx and 2-dec-9'-enyl-2-oxazoline Dc(=) Ox in the ionic liquid n-hexyl methylimidazolium tetrafluoroborate under microwave irradiation in 250 g/batch quantities. The polymer precipitates upon cooling, enabling easy recovery of the polymer and the ionic liquid. Both monomers can be obtained from fatty acids from renewable resources. pNonOx80 -stat-pDc(=) Ox20 can be used as polymer in a photoresist (resolution of 1 μm) based on UV-induced thiol-ene reactions...
October 26, 2015: ChemSusChem
https://www.readbyqxmd.com/read/26346177/construction-of-cluster-organic-frameworks-with-bnn-hexagonal-bn-topologies
#14
Wei-Hui Fang, Lei Zhang, Jian Zhang, Guo-Yu Yang
Two sandwiched cluster organic frameworks, Eu6 (OH)2 Cu9 I6 L12 (ox)3 ⋅H2 O⋅ClO4 (FJ-23, HL=4-pyridin- 4-yl-benzonic acid, ox=oxalate) and Eu6 Cu7 I7 L12 (OAc)6 (H2 O)2 ⋅2 H2 O (FJ-24, OAc=acetate) with bnn hexagonal BN topologies have been successfully made; these frameworks were assembled by nanosized graphene-like lanthanide wheel clusters and nanoscale trigonal prism metalloligands. The cooperation of small equatorial ligands and axially trigonal prism metalloligands plays a key role in the construction of such 5-connected nets...
October 26, 2015: Chemistry: a European Journal
https://www.readbyqxmd.com/read/26344911/ynamide-click-chemistry-in-development-of-triazole-vegfr2-tk-modulators
#15
Margaréta Vojtičková, Juraj Dobiaš, Gilles Hanquet, Gabriela Addová, Rengul Cetin-Atalay, Deniz Cansen Yildirim, Andrej Boháč
Structure novelty, chemical stability and synthetic feasibility attracted us to design 1,2,3-triazole compounds as potential inhibitors of VEGFR2 tyrosine kinase. Novel triazoles T1-T7 were proposed by oxazole (AAZ from PDB: 1Y6A)/1,2,3-triazole isosteric replacement, molecular modelling and docking. In order to enable synthesis of T1-T7 we developed a methodology for preparation of ynamide 22. Compound 22 was used for all Click chemistry reactions leading to triazoles T1-T3 and T6-T7. Among the obtained products, T1, T3 and T7 specifically bind VEGFR2 TK and modulate its activity by concentration dependent manner...
October 20, 2015: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/26322530/ultra-performance-liquid-chromatography-ion-mobility-time-of-flight-mass-spectrometry-characterization-of-naphthenic-acids-species-from-oil-sands-process-affected-water
#16
Rongfu Huang, Kerry N McPhedran, Mohamed Gamal El-Din
Ultraperformance liquid chromatography ion mobility time-of-flight mass spectrometry (UPLC-IM-TOFMS), integrating traveling wave ion mobility spectrometry (TWIMS) with negative electrospray ionization (ESI) mode, was used to achieve two-dimensional (2D) separation (drift vs retention times) of naphthenic acids (NAs). Unprocessed and ozonated commercial NAs were used for method development. Only O2-NAs were found in unprocessed NAs with ozonation creating O3-NAs and O4-NAs. Unprocessed and ozonated oil sands process-affected waters (OSPW) were examined to validate the method for complex matrix NAs...
October 6, 2015: Environmental Science & Technology
https://www.readbyqxmd.com/read/26322417/the-polyphenol-pgg-enhances-expression-of-sr-bi-and-abca1-in-j774-and-thp-1-macrophages
#17
Wenhua Zhao, Viktoria Haller, Andreas Ritsch
OBJECTIVES: Atherosclerosis is the major cause of cardiovascular disease. Epidemiological studies showed that the plasma concentration of high-density lipoprotein (HDL) cholesterol level is inversely related to the incidence of atherosclerosis probably due to its role in reverse cholesterol transport. 1,2,3,4, 6-penta-O-galloyl-β-d-glucose (PGG) is a prototypical gallotannin and the central compound in the biosynthetic pathway of hydrolysable tannin. PGG is highly enriched in a number of medicinal herbals...
October 2015: Atherosclerosis
https://www.readbyqxmd.com/read/26317011/valproic-acid-neuroprotection-in-the-6-ohda-model-of-parkinson-s-disease-is-possibly-related-to-its-anti-inflammatory-and-hdac-inhibitory-properties
#18
José Christian Machado Ximenes, Kelly Rose Tavares Neves, Luzia Kalyne A M Leal, Marta Regina Santos do Carmo, Gerly Anne de Castro Brito, Maria da Graça Naffah-Mazzacoratti, Ésper Abrão Cavalheiro, Glauce Socorro de Barros Viana
Parkinson's disease is a neurodegenerative disorder where the main hallmark is the dopaminergic neuronal loss. Besides motor symptoms, PD also causes cognitive decline. Although current therapies focus on the restoration of dopamine levels in the striatum, prevention or disease-modifying therapies are urgently needed. Valproic acid (VA) is a wide spectrum antiepileptic drug, exerting many biochemical and physiological effects. It has been shown to inhibit histone deacetylase which seems to be associated with the drug neuroprotective action...
2015: Journal of Neurodegenerative Diseases
https://www.readbyqxmd.com/read/26305254/apple-polyphenols-decrease-atherosclerosis-and-hepatic-steatosis-in-apoe-mice-through-the-ros-mapk-nf-%C3%AE%C2%BAb-pathway
#19
Zhe-Rong Xu, Jin-You Li, Xin-Wei Dong, Zhong-Ju Tan, Wei-Zhen Wu, Qiang-Min Xie, Yun-Mei Yang
In this study, we examined the effects of apple polyphenols (APs) on hyperlipidemia, atherosclerosis, hepatic steatosis and endothelial function and investigated the potential mechanisms. ApoE(-/-) mice were fed a western-type diet and orally treated with APs (100 mg/kg) or atorvastatin (10 mg/kg) for 12 weeks. Hyperlipidemia and atherosclerosis in the aortic sinuses and, and hepatic lipidosis were measured. The treatment with APs or atorvastatin induced a remarkable reduction in the atherosclerotic lesions and hepatic steatosis and decreased the levels of low-density lipoprotein, triglyceride, CCL-2 and VCAM-1 levels in the plasma...
August 2015: Nutrients
https://www.readbyqxmd.com/read/26305209/effects-of-2-oxoglutaric-acid-on-bone-morphometry-densitometry-mechanics-and-immunohistochemistry-in-9-month-old-boars-with-prenatal-dexamethasone-induced-osteopenia
#20
Ewa Tomaszewska, Piotr Dobrowolski, Marek Bieńko, Łukasz Prost, Sylwia Szymańczyk, Adam Zdybel
The structural quality of the connective tissue is genetically determined and is influenced by hormonal and nutritional modification. An effect of a 2-Ox-rich diet on bone mineralization and structure and expression of non-collagenous protein in articular and growth cartilages of maternal dexamethasone-treated 9-month-old boars was considered in this study. Sows were treated i.m. with dexamethasone at the dose of 0.03 mg kg(-1) body weight every second day during the last 45 days of pregnancy. After the birth, the boars were divided into two groups: administered and not supplemented with 2-Ox for 9 months (0...
November 2015: Connective Tissue Research
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