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https://www.readbyqxmd.com/read/30023357/calcined-corncob-kaolinite-combo-as-new-sorbent-for-sequestration-of-toxic-metal-ions-from-polluted-aqua-media-and-desorption
#1
Helen O Chukwuemeka-Okorie, Peter N Ekemezie, Kovo G Akpomie, Chisom S Olikagu
This study investigated a new area of improving the adsorption capacity of clay using corn cob as an alternative means of clay modification to the more expensive and complicated chemical treatment techniques. Kaolinite Clay (KC), Calcined corncob-kaolinite Combo (CCKC), and Corncob (CC) adsorbents were utilized. The adsorbents were characterized by Fourier Transform-Infrared (FT-IR) Spectroscopy, Scanning Electron Microscopy (SEM), X-ray fluorescence spectroscopy, and Brunauer-Emmett-Teller (BET) surface area analyzer...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/30021908/quantitative-spatial-profiling-of-pd-1-pd-l1-interaction-and-hla-dr-ido-1-predicts-improved-outcomes-of-anti-pd-1-therapies-in-metastatic-melanoma
#2
Douglas B Johnson, Jennifer M Bordeaux, Ju-Young Kim, Christine A Vaupel, David L Rimm, Thai H Ho, Richard W Joseph, Adil I Daud, Robert M Conry, Elizabeth M Gaughan, Leonel F Hernandez-Aya, Anastasios Dimou, Pauline Funchain, James W Smithy, John S Witte, Svetlana B McKee, Jennifer Ko, John Wrangle, Bashar Dabbas, Shabnam Tangri, Jelveh Lameh, Jeffrey M Hall, Joseph Markowitz, Justin M Balko, Naveen K Dakappagari
PURPOSE: PD-1/L1 axis-directed therapies produce clinical responses in a subset of patients, therefore, biomarkers of response are needed. We hypothesized quantifying key immunosuppression mechanisms within the tumor microenvironment by multiparameter algorithms would identify strong predictors of anti-PD1 response. METHODS: Pre-treatment tumor biopsies from 166 patients treated with anti-PD-1 across 10 academic cancer centers were fluorescently stained with multiple markers in discovery (n = 24) and validation (n = 142) cohorts...
July 18, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/30018825/comparisons-of-the-health-benefits-of-strength-training-aqua-fitness-and-aerobic-exercise-for-the-elderly
#3
Raquel Leirós-Rodríguez, Anxela Soto-Rodríguez, Ignacio Pérez-Ribao, José L García-Soidán
Objective: To compare strength training, aqua-fitness, and aerobic exercise programs to discern the differences in the benefits achieved by each of the activities in older people. Design: Double-blind randomized trial. Setting: Controlled clinical environment. Participants: 108 people: 54 female paired with a male of the same age (average age of 65.5 ± 5.6 years). Interventions: Three exercise programs (aqua-fitness, aerobic exercise, and strength training) for six months...
2018: Rehabilitation Research and Practice
https://www.readbyqxmd.com/read/30005805/a-closely-related-clade-of-globally-distributed-bloom-forming-cyanobacteria-within-the-nostocales
#4
Connor B Driscoll, Kevin A Meyer, Sigitas Šulčius, Nathan M Brown, Gregory J Dick, Huansheng Cao, Giedrius Gasiūnas, Albertas Timinskas, Yanbin Yin, Zachary C Landry, Timothy G Otten, Timothy W Davis, Susan B Watson, Theo W Dreher
In order to better understand the relationships among current Nostocales cyanobacterial blooms, eight genomes were sequenced from cultured isolates or from environmental metagenomes of recent planktonic Nostocales blooms. Phylogenomic analysis of publicly available sequences placed the new genomes among a group of 15 genomes from four continents in a distinct ADA clade (Anabaena/Dolichospermum/Aphanizomenon) within the Nostocales. This clade contains four species-level groups, two of which include members with both Anabaena-like and Aphanizomenon flos-aquae-like morphology...
July 2018: Harmful Algae
https://www.readbyqxmd.com/read/30002909/synthesis-crystal-structure-and-hirshfeld-surface-analysis-of-tetra-aqua-bis-isonicotinamide-%C3%AE%C2%BA-n-1-cobalt-ii-succinate
#5
Sevgi Kansiz, Sergey Malinkin, Necmi Dege
The reaction of CoCl2 with succinic acid and isonicotinamide in basic solution produces the title complex [Co(C6 H6 N2 O)2 (H2 O)4 ](C4 H4 O4 ). The cobalt(II) ion of the complex cation and the succinate anion are each located on an inversion centre. The CoII ion is octa-hedrally coordinated by four O atoms of water mol-ecules and two N atoms of isonicotinamide mol-ecules. The two ions are linked via Owater -H⋯Osuccinate hydrogen bonds, forming chains propagating along [001]. In the crystal, these hydrogen-bonded chains are linked into a three-dimensional framework by further O-H⋯O hydrogen bonds and N-H⋯O hydrogen bonds...
July 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/30002886/crystal-structures-of-sodium-lithium-and-ammonium-4-5-di-hydroxy-benzene-1-3-di-sulfonate-tiron-hydrates
#6
Corey J Herbst-Gervasoni, Michael R Gau, Michael J Zdilla, Ann M Valentine
The solid-state structures of the Na+ , Li+ , and NH4 + salts of the 4,5-di-hydroxy-benzene-1,3-di-sulfonate (tiron) dianion are reported, namely disodium 4,5-di-hydroxy-benzene-1,3-di-sulfonate, 2Na+ ·C6 H4 O8 S2 2- , μ-4,5-di-hydroxy-benzene-1,3-di-sulfonato-bis-[aqua-lithium(I)] hemihydrate, [Li2 (C6 H4 O8 S2 )(H2 O)2 ]·0.5H2 O, and di-ammonium 4,5-di-hydroxy-benzene-1,3-di-sulfonate monohydrate, 2NH4 + ·C6 H4 O8 S2 2- ·H2 O. Inter-molecular inter-actions vary with the size of the cation, and the asymmetric unit cell, and the macromolecular features are also affected...
July 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29993111/synthesis-x-ray-structural-characterization-and-dft-calculations-of-mononuclear-nickel-ii-complexes-containing-diamine-and-methacrylate-ligands
#7
Rasoul Vafazadeh, Mansoor Namazian, Behnoosh Shahpoori-Arani, Anthony C Willis, Paul D Carr
The mononuclear Ni(II) complexes [Ni(en)2(H2O)2](MAA)2 (1) and [Ni(pn)2(MAA)2] (2), where MAA, en and pn are methacrylate, ethylendiamine and 1,3-propylendiamine, respectively, have been synthesized and characterized by elemental analysis, FT-IR and UV�Vis spectroskopy. Structures of the complexes have been determined by single-crystal X-ray diffraction analyses. In the nickel(II) complexes 1 and 2 nickel(II) ion is six-coordinate and has a distorted octahedral geometry. Ni(II) is bonded to four nitrogen atoms of the two diamines and additionally to two oxygen atoms of aqua ligand in 1, and two oxygen atoms of methacrylate ligands in 2...
June 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29985382/-dynamics-of-the-emotional-state-and-physiological-parameters-of-the-organism-during-long-term-aqua-thermal-impact
#8
T A Fisher, S A Petrov, E L Dotsenko, Yu G Suhovei
The data presented in this article illustrate the dynamics of the affective sphere of the mental processes associated with the higher nervous activity and the characteristics of the neuroendocrine system (including the vegetative index of Kerdo, cortisol and serotonin levels) in the participants of the marathon swimming competition covering the distance of 101.4 km. We investigated the relationship between the levels of the above hormones and the functional activity of the vegetative nervous system. AIM: The objectives of the present study were (1) to determine the dynamics of the changes in the psychophysiological characteristics of the participants in the marathon swimming competition during which the world record for the covering of the 101,4 km distance in the ice water was set and (2) to follow up the development of the stress response at different levels of the life support system...
2018: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/29982907/application-of-enrichment-factor-geoaccumulation-index-and-ecological-risk-index-in-assessing-the-elemental-pollution-status-of-surface-sediments
#9
Ley Juen Looi, Ahmad Zaharin Aris, Fatimah Md Yusoff, Noorain Mohd Isa, Hazzeman Haris
Sediment can accumulate trace elements in the environment. This study profiled the magnitude of As, Ba, Cd, Co, Cu, Cr, Ni, Pb, Se, and Zn pollution in surface sediments of the west coast of Peninsular Malaysia. Trace elements were digested using aqua regia and were analyzed using the inductively coupled plasma-mass spectrometry. The extent of elemental pollution was evaluated using with the enrichment factor (EF) and geoaccumulation index (Igeo ). This study found that the elemental distribution in the sediment in descending order was Zn > Ba > Cr > Pb > Cu > As > Ni > Co > Se > Cd...
July 7, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29977000/synergy-of-aeronet-and-modis-aod-products-in-the-estimation-of-pm-2-5-concentrations-in-beijing
#10
Disong Fu, Xiangao Xia, Jun Wang, Xiaoling Zhang, Xiaojing Li, Jianzhong Liu
Satellite aerosol optical depth (AOD) is widely used to estimate particulate matter with aerodynamic diameter ≤2.5 µm (PM2.5 ) mass concentrations. Polar orbiting satellite retrieval 1-2 times each day is frequently affected by cloud, snow cover or misclassification of heavy pollution. Novel methods are therefore required to improve AOD sampling. Sunphotometer provides much more AODs than satellite at a fixed point. Furthermore, much of the aerosol pollution is regional. Both factors indicate that sunphotometer has great potential for PM2...
July 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29974247/quantum-chemical-simulations-of-the-hydration-of-pb-ii-ion-structure-hydration-energies-and-pk-a1-value
#11
Andrey M Kuznetsov, Alexey N Masliy, Gregory V Korshin
Thermodynamic and structural aspects of the hydration of Pb(II) ions were explored based on DFT calculations combined with the supermolecular/continuum solvent model. Hydration of Pb(II) was considered as the formation of Pb(H2 O)n 2+ aqua complexes (n=6-9) from the gas phase Pb(II) ion. Hexa- and hepta-aqua Pb(II) complexes were shown to exhibit the hemidirected symmetry, while those containing eight and nine water molecules are characterized by the holodirected symmetry. The calculations showed that because Pb(H2 O)n 2+ complexes with six to nine water molecules have comparable thermodynamic stabilities, such complexes are likely to coexist in aqueous solutions...
July 4, 2018: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29966921/in-situ-enzymatic-generation-of-gold-for-ultrasensitive-amperometric-sandwich-immunoassay-of-procalcitonin
#12
Yuyun Sui, Aigui Xu, Xiaorui Jin, Jiao Zheng, Xin He, Yan Cheng, Qingji Xie, Rushi Liu
Procalcitonin (PCT) is an important indicator for bacterial inflammatory diseases, and its sensitive, accurate and rapid detection has important clinical value. On the basis of sandwich immunoassay, glucose oxidase-catalyzed gold deposition and in-situ microliter-droplet anodic stripping voltammetry (ASV) of the enzyme-generated gold directly on the immunoelectrode, the ultrasensitive electrochemical detection of PCT is achieved. A new method of the chemical dissolution of gold by an appropriately diluted aqua regia and the simultaneous cathodic preconcentration of gold on the immunoelectrode is suggested, which gives the better performance for the ASV analysis of gold than the reported one...
June 22, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29964631/-selective-inhibition-of-rice-straw-extract-on-growth-of-cyanobacteria-and-chlorophyta
#13
Wen Su, Jie Chen, Sheng-Peng Zhang, Fan-Xiang Kong
Rice straw is supposed to be an environment-friendly biomaterial for inhibiting the growth of harmful blooms of the cyanobacterium Microcystis aeruginosa . The effects of rice straw extract(RSE) on algal growth, morphologic parameters(cell size), and physiological parameters( in vivo Chl-a fluorescence) were investigated using flow cytometry. We examined the selective inhibitory potential of rice straw on four cyanobacterial strains(toxic and non-toxic Microcystis aeruginosa , toxic Anabaena flos-aquae , and Microcystis ichthyoblabe ), in comparison with inhibitory effects on three common freshwater green algae( Selenastrum capricornutum, Chlorella pyrenoidosa , and Scenedesmus obliqnus )...
July 8, 2017: Huan Jing Ke Xue= Huanjing Kexue
https://www.readbyqxmd.com/read/29964602/-analysis-of-spatio-temporal-distribution-and-variation-characteristics-of-aerosol-optical-depth-over-the-northwest-of-china-by-modis-c6-product
#14
Shi-Wei Zhao, Xiao-Qing Gao
This work compared the collection 6 MODIS aerosol optical depth products with sun photometer data from AERONET, and evaluated the applicability of C6 merged data in the northwest of China. The spatio-temporal variation characteristics and influencing factors of AOD over northwest of China were analyzed by MODIS/AQUA C6 MYD08-M3 products from 2006 to 2015, and the results showed that Southern Xinjiang and Guanzhong region of Shanxi province had relatively high AOD, whereas the south of Qinghai and Gansu province had low values; Junggar Basin was the incremental area of AOD for the first 5 years and second 5 years, whereas converse result existed in Qaidam Basin and Hetao area...
July 8, 2017: Huan Jing Ke Xue= Huanjing Kexue
https://www.readbyqxmd.com/read/29951240/crystal-structures-of-binary-compounds-of-meldonium-3-1-1-1-tri-methyl-hydrazin-1-ium-2-yl-prop-ano-ate-with-sodium-bromide-and-sodium-iodide
#15
Alexander Y Nazarenko
3-(1,1,1-Tri-methyl-hydrazin-1-ium-2-yl)propano-ate (C6 H14 N2 O2 , M , more commonly known under its commercial names Meldonium or Mildronate ) co-crystalizes with sodium bromide and sodium iodide forming polymeric hydrates poly[[tetra-μ-aqua-di-aqua-bis-[3-(1,1,1-tri-methyl-hydrazin-1-ium-2-yl)propano-ate]disodium] dibromide tetra-hydrate], [Na2 (C6 H14 N2 O2 )2 (H2 O)6 ]Br2 ·4H2 O, and poly[[di-μ-aqua-di-aqua-[μ-3-(1,1,1-tri-methyl-hydrazin-1-ium-2-yl)propano-ate]disodium] diiodide], [Na2 (C6 H14 N2 O2 )2 (H2 O)4 ]I2 ...
June 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29951235/crystal-structure-of-a-heterometallic-coordination-polymer-catena-poly-tetra-aqua-cobalt-ii-%C3%AE-pyridine-2-6-di-carboxyl-ato-calcium-ii-%C3%AE-pyridine-2-6-di-carboxyl-ato-dihydrate
#16
Jie-Shuang Lin, Bing-Guang Zhang
In the crystal of the title polymeric complex, {[CoCa(C7 H3 NO4 )2 (H2 O)4 ]·2H2 O} n ( 1 ), the CoII ion is N , O , O '-chelated by two pyridine-2,6-di-carboxyl-ate anions in a distorted N2 O4 octa-hedral geometry, and two carboxyl-ate O atoms of pyridine-2,6-di-carboxyl-ate anions bridge tetra-aqua-calcium(II) units to form polymeric chains propagating along the b -axis direction. In the crystal, O-H⋯O and C-H⋯O hydrogen bonds, and offset π-π stacking inter-actions [inter-centroid distances = 3.551 (1) and 3...
June 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/29949364/dicarbonyl-cis-m-co-2-n-o-c-p-m-re-99m-tc-complexes-with-a-new-2-1-1-donor-atom-combination
#17
Charalampos Triantis, Antonio Shegani, Christos Kiritsis, Myrto Ischyropoulou, Ioanna Roupa, Vassilis Psycharis, Catherine Raptopoulou, Patricia Kyprianidou, Maria Pelecanou, Ioannis Pirmettis, Minas S Papadopoulos
The synthesis and characterization of the dicarbonyl mixed ligand cis-[Re(CO)2 (quin)(cisc)(PPh3 )] complex, 4, where quin is the deprotonated quinaldic acid, cisc is cyclohexyl isocyanide, and PPh3 is triphenylphosphine, is presented. The synthesis of 4 proceeds in three steps. In the first, the intermediate fac-[Re(CO)3 (quin)(H2 O)] aqua complex 2 is generated from the fac-[NEt4 ]2 [Re(CO)3 Br3 ] precursor, together with the brominated products fac-[Re(CO)3 (quinH)(Br)] 1a and fac-[NEt4 ][Re(CO)3 (quin)(Br)] 1b, in low yield...
June 27, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29949354/a-bioactive-l-phenylalanine-derived-arene-in-multitargeted-organoruthenium-compounds-impact-on-the-antiproliferative-activity-and-mode-of-action
#18
Sanam Movassaghi, Euphemia Leung, Muhammad Hanif, Betty Y T Lee, Hannah U Holtkamp, Jason K Y Tu, Tilo Söhnel, Stephen M F Jamieson, Christian G Hartinger
RuII (η6 -arene) compounds carrying bioactive flavonol ligands have shown promising anticancer activity against tumor cells via a multitargeting mode of action, i.e., through interaction with DNA and inhibition of topoisomerase IIα. By introducing a novel arene ligand based on the amino acid l-phenylalanine (Phe), we aimed to alter the pharmacological properties of the complexes. We report here a series of novel RuII (η6 -arene)Cl complexes with different substituents on the phenyl ring of the flavonol which should maintain the multitargeting capability of the parent η6 - p-cymene (cym) complexes...
June 27, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29947634/dibenzofuran-4-6-bis-oxazoline-dbfox-a-novel-trans-chelating-bis-oxazoline-ligand-for-asymmetric-reactions
#19
REVIEW
Kennosuke Itoh, Mukund P Sibi
The trans-chelating bis(oxazoline) ligand (R,R)-4,6-dibenzofurandiyl-2,2'-bis(4-phenyloxazoline) [(R,R)-DBFOX/Ph] coordinates metal ions to give C2-symmetric complexes which effectively catalyze a variety of asymmetric reactions. (R,R)-DBFOX/Ph·Ni(ClO4)2·3H2O, whose crystal structure is octahedral with three aqua ligands, can be stored under air for several months without loss of catalytic activity and promotes highly enantioselective reactions even in the presence of excess amounts of water, alcohols, amines, and acids...
June 27, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29945086/monitoring-metal-pollution-in-soils-using-portable-xrf-and-conventional-laboratory-based-techniques-evaluation-of-the-performance-and-limitations-according-to-metal-properties-and-sources
#20
Antonio G Caporale, Paola Adamo, Fiore Capozzi, Giuliano Langella, Fabio Terribile, Simona Vingiani
Large variability in the spatial distribution and content of metals is generally recognised in anthropogenically-polluted soils, hence, a detailed site investigation implying the collection and analysis of a large number of soil samples is often necessary. To this regard, the selection of a rapid, cost-effective and accurate analytical technique to assess the concentration of metals in soil is of paramount importance. The overall objective of this work was to evaluate the possibility of assessing the aqua regia-extractable (AR) content of metals in soil from the multi-element profile of the soil obtained by a portable X-ray fluorescence analyser (pXRF)...
June 23, 2018: Science of the Total Environment
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