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https://www.readbyqxmd.com/read/29786913/new-insights-into-the-anion-transport-selectivity-and-mechanism-of-tren-based-tris-thio-ureas
#1
Laura Jowett, Ethan Howe, Xin Wu, Nathalie Busschaert, Philip Alan Gale
The anion transport properties of a series of previously reported tren-based anionophores have been revisited using new assays designed to measure anion uniport. This study provides new insights into the transport mechanism and selectivity of this important class of transporters. Specifically, we report the chloride and nitrate transport selectivity of these systems and quantify sulfate transport to determine EC50 values for sulfate transport for the first time. Two new assays were developed to study bicarbonate transport allowing accurate quantification of chloride/bicarbonate exchange...
May 22, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29786906/reversible-c-h-activation-facile-b-c-b-h-metathesis-and-apparent-hydroboration-catalysis-by-a-xanthene-based-frustrated-lewis-pair
#2
Petra Vasko, Ili A Zulkifly, M Ángeles Fuentes, Zhenbo Mo, Jamie Hicks, Paul C J Kämer, Simon Aldridge
A dimethylxanthene-based phosphine/borane frustrated Lewis pair (FLP) is shown to effect reversible C-H activation, cleaving phenylacetylene, PhCCH, to give an equilibrium mixture of the free FLP and phosphonium acetylide in CD₂Cl₂ solution at room temperature. This system also reacts with B-H bonds although in a different fashion: reactions with HBpin and HBcat proceed via C-B/B-H metathesis, leading to replacement of the -B(C₆F₅)₂ Lewis acid component by -Bpin/-Bcat, and transfer of HB(C₆F₅)₂ to the phosphine Lewis base...
May 22, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29786866/characterization-of-efficacy-and-safety-of-pathogen-inactivated-and-quarantine-plasma-in-routine-use-for-treatment-of-acquired-immune-thrombotic-thrombocytopenic-purpura
#3
R Herbrecht, M Ojeda-Uribe, D Kientz, C Fohrer, A Bohbot, O Hinschberger, K-L Liu, E Remy, C Ernst, J-S Lin, L Corash, J P Cazenave
BACKGROUND: Auto-immune thrombotic thrombocytopenic purpura (TTP) is a morbid multi-organ disorder. Cardiac involvement not recognized in initial disease descriptions is a major cause of morbidity. Therapeutic plasma exchange (TPE) requires exposure to multiple plasma donors with risk of transfusion-transmitted infection (TTI). Pathogen inactivation (PI) with amotosalen-UVA, the INTERCEPT Blood System for Plasma (IBSP) is licensed to reduce TTI risk. METHODS: An open-label, retrospective study evaluated the efficacy of quarantine plasma (QP) and IBSP in TTP and defined treatment emergent cardiac abnormalities...
May 21, 2018: Vox Sanguinis
https://www.readbyqxmd.com/read/29786712/cocrystals-of-a-1-2-4-thiadiazole-based-potent-neuroprotector-with-gallic-acid-solubility-thermodynamic-stability-relationships-and-formation-pathways
#4
Artem O Surov, Andrei V Churakov, Alexey N Proshin, Xia-Lin Dai, Tongbu Lu, German L Perlovich
Three distinct solid forms, namely anhydrous cocrystals with 2 : 1 and 1 : 1 drug/acid ratios ([TDZ : GA] (2 : 1), [TDZ : GA] (1 : 1)), and a hydrated one having 1 : 1 : 1 drug/acid/water stoichiometry ([TDZ : GA : H2O] (1 : 1 : 1)), have been formed by cocrystallization of the biologically active 1,2,4-thiadiazole derivative (TDZ) with gallic acid (GA). The thermodynamic stability relationships between the cocrystals were rationalized in terms of Gibbs energies of the formation reactions and further verified by performing a set of competitive and exchange mechanochemical reactions...
May 22, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29786664/enable-2017-the-first-european-phd-and-post-doc-symposium-session-3-in-vitro-to-in-vivo-modeling-life-in-3d
#5
Gianmarco Di Mauro, Ambra Dondi, Giovanni Giangreco, Alexander Hogrebe, Elja Louer, Elisa Magistrati, Meeli Mullari, Gemma Turon, Wouter Verdurmen, Helena Xicoy Cortada, Sanja Zivanovic
The EUROPEAN ACADEMY FOR BIOMEDICAL SCIENCE (ENABLE) is an initiative funded by the European Union Horizon 2020 program involving four renowned European research institutes (Institute for Research in Biomedicine-IRB Barcelona, Spain; Radboud Institute for Molecular Life Sciences-RIMLS, the Netherlands; Novo Nordisk Foundation Center for Protein Research-NNF CPR, Denmark; European School of Molecular Medicine-SEMM, Italy) and an innovative science communication agency (Scienseed). With the aim to promote biomedical science of excellence in Europe, ENABLE organizes an annual three-day international event...
May 22, 2018: Journal of Personalized Medicine
https://www.readbyqxmd.com/read/29786580/-iron-deficiency-reduces-systemic-inflammation-in-obese-women
#6
Vadim M Nedoborenko, Anna V Lavrenko, Tatyana V Mamontova, Lyudmyla E Vesnina, Igor P Kaidashev
OBJECTIVE: Introduction: Iron plays an important role in the functioning of immunological monitoring due to its stimulating and differentiating effect on the immune system. Obesity is accompanied by chronic low grade inflammation and may be accompanied by a change in the concentration of iron in the blood serum. The aim of the study was to determine the level of systemic inflammation in iron deficiency anemia in patients with obesity. PATIENTS AND METHODS: Materials and methods: 40 women with iron deficiency anemia (30 with obesity and 10 without obesity) and 10 with obesity of a similar age (control group) participated in the study...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29786459/anatomy-of-the-attraction-basins-breaking-with-the-intuition
#7
Leticia Hernando, Alexander Mendiburu, Jose A Lozano
Solving combinatorial optimization problems efficiently requires the development of algorithms that consider the specific properties of the problems. In this sense, local search algorithms are designed over a neighborhood structure that partially accounts for these properties. Considering a neighborhood, the space is usually interpreted as a natural landscape, with valleys and mountains. Under this perception, it is commonly believed that, if maximizing, the solutions located in the slopes of the same mountain belong to the same attraction basin, with the peaks of the mountains being the local optima...
May 22, 2018: Evolutionary Computation
https://www.readbyqxmd.com/read/29786183/-hyperkalemia-as-a-limiting-factor-in-the-use-of-drugs-that-block-the-renin-angiotensin-aldosterone-system-raas
#8
Antonio Santoro, Marcora Mandreoli
Angiotensin-converting enzyme (ACE-I) inhibitors and ARBs have shown real efficacy in reducing blood pressure, proteinuria, in slowing the progression of chronic kidney disease (MRC) and in clinical improvement. in patients with heart failure, diabetes mellitus and ischemic heart disease. However, their use is limited by some side effects such as the increase in serum potassium (K), which can be particularly severe in patients with renal insufficiency. In the 23,000 patients followed by the PIRP project of the Emilia-Romagna Region, hyperkalaemia at the first visit (K> 5...
May 2018: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/29786004/anterior-segment-optical-coherence-tomography-of-intraocular-lens-opacification
#9
Saurabh Choudhry, Neha Goel, Aanchal Mehta, Nidhi Mahajan
Postoperative opacification of a hydrophilic acrylic intraocular lens (IOL) is an uncommon complication. A 57-year-old diabetic female who had undergone phacoemulsification with IOL implantation in her right eye 16 years back presented with diminution of vision in the same eye for 3 years. Significant IOL opacification was observed clinically and anterior segment optical coherence tomography clearly delineated the intraoptic deposits, sparing the haptics, and edges of the optic. IOL explant and exchange was performed leading to restoration of visual acuity to 6/9...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29785912/para-%C3%AE%C2%BA-casein-during-the-ripening-and-storage-of-low-ph-high-moisture-feta-cheese
#10
Voula Alexandraki, Golfo Moatsou
The hypothesis of this research paper was that the physicochemical conditions in a low-pH, high-moisture white brined cheese such as Feta would make para-κ-casein vulnerable to residual chymosin activity during ripening and storage. It was important to address this hypothesis, since cheese para-κ-casein could theoretically be used for the assessment of the origin of cheese milk by means of various analytical methods. Feta cheese was manufactured from sheep milk and from four different mixtures of sheep and goat milk in triplicate...
May 2018: Journal of Dairy Research
https://www.readbyqxmd.com/read/29785671/agarolytic-culturable-bacteria-associated-with-three-antarctic-subtidal-macroalgae
#11
Verónica Sánchez Hinojosa, Joel Asenjo, Sergio Leiva
Bacterial communities of Antarctic marine macroalgae remain largely underexplored in terms of diversity and biotechnological applications. In this study, three Antarctic subtidal macroalgae (Himantothallus grandifolius, Pantoneura plocamioides and Plocamium cartilagineum), two of them endemic of Antarctica, were investigated as a source for isolation of agar-degrading bacteria. A total of 21 epiphytic isolates showed agarolytic activity at low temperature on agar plates containing agar as the sole carbon source...
May 21, 2018: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29785505/preparing-for-an-insured-old-age-insurance-purchase-and-self-support-in-old-age-in-rural-china
#12
Lihong Shi
This article explores an emerging trend among young and middle-aged rural couples in Northeast China who have purchased recently marketized commercial insurance as a way to prepare for self-support in old age. It discusses how the commercial insurance industry has created a rural elder-care market among a population that traditionally relied on family for support in old age. It also delves into the ways in which the transformations of intergenerational exchange and family structure and a lack of health care access have contributed to the preparation for self-support in old age and have thus fostered the creation of a rural elder-care market for the insurance industry...
May 21, 2018: Journal of Cross-cultural Gerontology
https://www.readbyqxmd.com/read/29785443/organic-inorganic-hybrid-perovskite-quantum-dots-with-high-plqy-and-enhanced-carrier-mobility-through-crystallinity-control-by-solvent-engineering-and-solid-state-ligand-exchange
#13
Jin Woo Choi, Hee Chul Woo, Xiaoguang Huang, Wan-Gil Jung, Bong-Joong Kim, Sie-Wook Jeon, Sang-Youp Yim, Jae-Suk Lee, Chang-Lyoul Lee
The photoluminescence quantum yield (PLQY) and charge carrier mobility of organic-inorganic perovskite QDs were enhanced by the optimization of crystallinity and surface passivation as well as solid-state ligand exchange. The crystallinity of perovskite QDs was determined by the Effective solvent field (Esol) of various solvents for precipitation. The solvent with high Esol could more quickly countervail the localized field generated by the polar solvent, and it causes fast crystallization of the dissolved precursor, which results in poor crystallinity...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29785423/targeted-replacement-systematic-studies-of-dodecanuclear-mln-coordination-clusters-m-cr-co-ln-dy-y
#14
Sihuai Chen, Valeriu Mereacre, Zhiying Zhao, Wanwan Zhang, Mengsi Zhang, Zhangzhen He
Three dodecanuclear 3d-4f coordination clusters, [CrIII6LnIII6(μ3-OH)8(tbdea)6(C6H5COO)16]·2H2O (Ln = Dy (1), Y (2)) and [CoIII6DyIII6(μ3-OH)8(nbdea)6(m-CH3C6H4COO)16]·2H2O·2CH3CN (3), have been synthesized under solvothermal conditions and characterized. Single-crystal X-ray diffraction analysis revealed that all three compounds possess an analogous {MIII6LnIII6} core (M = Cr, Co; Ln = Dy, Y) and dc magnetic susceptibility studies indicated that the magnetic exchange couplings between DyIII ions are dominant antiferromagnetic, while the CrIII-DyIII interactions are weakly ferromagnetic...
May 22, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29785421/in-situ-identification-of-cation-exchange-induced-reversible-transformations-of-3d-and-2d-perovskites
#15
Weixin Huang, Subha Sadhu, Pitambar Sapkota, Sylwia Ptasinska
The optical and structural properties of hybrid perovskites can be tuned by the post-synthetic introduction of new cations. To advance the development of this approach, knowledge of the reaction mechanism is essential, but has not yet been elucidated. Here, the effect of n-octylamine on three-dimensional (3D) methylammonium lead bromide (MAPbBr3) was investigated by in situ X-ray photoelectron spectroscopy. Spectroscopic analysis indicated equimolar substitutions between octylammonium (OcA+) and methylammonium (MA+) cations that cause the formation of two-dimensional (2D) octylammonium lead bromide ((OcA)2PbBr4)...
May 22, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29785259/the-impact-of-multifaceted-osteoporosis-group-education-on-patients-decision-making-regarding-treatment-options-and-lifestyle-changes
#16
Annesofie L Jensen, Gitte Wind, Bente Lomholt Langdahl, Kirsten Lomborg
Introduction: Patients with chronic diseases like osteoporosis constantly have to make decisions related to their disease. Multifaceted osteoporosis group education (GE) may support patients' decision-making. This study investigated multifaceted osteoporosis GE focusing on the impact of GE on patients' decision-making related to treatment options and lifestyle. Material and Methods: An interpretive description design using ethnographic methods was utilized with 14 women and three men diagnosed with osteoporosis who attended multifaceted GE...
2018: Journal of Osteoporosis
https://www.readbyqxmd.com/read/29785222/proximal-femoral-bone-regeneration-after-an-uncemented-hydroxyapatite-coated-long-stem-in-revision-hip-surgery
#17
José Cordero-Ampuero, Eduardo Garcia-Rey, Eduardo Garcia-Cimbrelo
Background: Bone remodelling with lateral femoral cortex thinning is a major concern after extensively porous-coated long-stem in revision surgery. Extensive hydroxyapatite coated long-stems were introduced to improve osseointegration, but bone remodelling changes have not been quantified. Objective: The question of whether bone remodelling changes from extensive hydroxyapatite-coated long stems influence the durability of femoral revision, clinical outcome is assessed in follow-up radiographs...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29784983/thermodynamic-and-crystallographic-model-for-anion-uptake-by-hydrated-calcium-aluminate-afm-an-example-of-molybdenum
#18
Nicolas C M Marty, Sylvain Grangeon, Erik Elkaïm, Christophe Tournassat, Clémence Fauchet, Francis Claret
Amongst all cement phases, hydrated calcium aluminate (AFm) plays a major role in the retention of anionic species. Molybdenum (Mo), whose 93 Mo isotope is considered a major steel activation product, will be released mainly under the form of MoO4 2- in a radioactive waste repository. Understanding its fate is of primary importance in a safety analysis of such disposal. This necessitates models that can both predict quantitatively the sorption of Mo by AFm and determine the nature of the sorption process (i...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784882/phenotypic-assessment-suggests-multiple-start-codons-for-hetn-an-inhibitor-of-heterocyst-differentiation-in-anabaena-sp-strain-pcc-7120
#19
Orion S Rivers, Silvia Beurmann, Allexa Dow, Loralyn M Cozy, Patrick Videau
Multicellular organisms must carefully regulate the timing, number, and location of specialized cellular development. In the filamentous cyanobacterium Anabaena sp. strain PCC 7120, nitrogen-fixing heterocysts are interspersed between vegetative cells in a periodic pattern to achieve optimal exchange of bioavailable nitrogen and reduced carbon. The spacing between heterocysts is regulated by the activity of two developmental inhibitors: PatS and HetN. PatS functions to create a de novo pattern from a homogenous field of undifferentiated cells, while HetN maintains the pattern throughout subsequent growth...
May 21, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29784794/synergy-between-fe-and-ni-in-the-optimal-performance-of-ni-fe-ooh-catalysts-for-the-oxygen-evolution-reaction
#20
Hai Xiao, Hyeyoung Shin, William A Goddard
The oxygen evolution reaction (OER) is critical to solar production of fuels, but the reaction mechanism underlying the performance for a best OER catalyst, Fe-doped NiOOH [(Ni,Fe)OOH], remains highly controversial. We used grand canonical quantum mechanics to predict the OER mechanisms including kinetics and thus overpotentials as a function of Fe content in (Ni,Fe)OOH catalysts. We find that density functional theory (DFT) without exact exchange predicts that addition of Fe does not reduce the overpotential much...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
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