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https://www.readbyqxmd.com/read/28929771/kinetic-and-thermodynamic-control-in-porphyrin-and-phthalocyanine-self-assembled-monolayers
#1
K W Hipps, Ursula Mazur
Porphyrins and phthalocyanines are ubiquitous in modern science and technology. Their stability, redox properties, and photoresponse make them candidates for numerous applications. Many of these applications rely on thin films, and these are critically dependent on the first monolayer. In this article, we focus on noncovalently bound self-assembled monolayers of porphyrins and phthalocyanines at the solution-solid interface with special emphasis on the kinetic and thermodynamic processes that define the films and their reaction chemistry...
September 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28929153/two-dimensional-metal-organic-frameworks-with-high-oxidation-states-for-efficient-electrocatalytic-urea-oxidation
#2
Dongdong Zhu, Chunxian Guo, Jinlong Liu, Liang Wang, Yi Du, Shi-Zhang Qiao
A two-dimensional metal-organic framework (MOF) comprising nickel species and an organic ligand of benzenedicarboxylic acid is fabricated and explored as an electrocatalyst for urea oxidation reaction (UOR). The excellent UOR performance is found to be partially due to the high active site density of the two-dimensional MOF, and largely because of the high oxidation state of the nickel species.
September 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28928783/assessment-of-the-hardness-of-different-orthodontic-wires-and-brackets-produced-by-metal-injection-molding-and-conventional-methods
#3
Shiva Alavi, Marzie Kachuie
BACKGROUND: This study was conducted to assess the hardness of orthodontic brackets produced by metal injection molding (MIM) and conventional methods and different orthodontic wires (stainless steel, nickel-titanium [Ni-Ti], and beta-titanium alloys) for better clinical results. MATERIALS AND METHODS: A total of 15 specimens from each brand of orthodontic brackets and wires were examined. The brackets (Elite Opti-Mim which is produced by MIM process and Ultratrimm which is produced by conventional brazing method) and the wires (stainless steel, Ni-Ti, and beta-titanium) were embedded in epoxy resin, followed by grinding, polishing, and coating...
July 2017: Dental Research Journal
https://www.readbyqxmd.com/read/28928779/evaluation-of-the-effect-of-three-mouthwashes-on-the-mechanical-properties-and-surface-morphology-of-several-orthodontic-wires-an-in-vitro-study
#4
Hossein Aghili, Sogra Yassaei, Farzaneh Eslami
BACKGROUND: The aim of this study was to evaluate and compare the changes in the mechanical properties and surface morphology of different orthodontic wires after immersion in three mouthwash solutions. MATERIALS AND METHODS: In this in vitro study, five specimens of each of 0.016 inch nickel titanium (NiTi), coated NiTi, and stainless steel orthodontic wires were selected. The specimens were immersed in 0.05% sodium fluoride (NaF), 0.2% chlorhexidine, Zataria multiflora extract, and distilled water (control) for 1...
July 2017: Dental Research Journal
https://www.readbyqxmd.com/read/28926806/simultaneous-removal-of-sulfides-and-benzene-in-fcc-gasoline-by-in-situ-hydrogenation-over-nilain-zro2-r-al2o3
#5
Lei Wang, Qian Liu, Chunyu Jing, Jiajia Yin, Nchare Mominou, Shuzhen Li
The ZrO2-r-Al2O3 composite was developed and co-modified with nickel, lanthanum and indium species by the impregnation method. A fixed-bed reactor was utilized to investigate the activity of the resulting catalysts in the removal of sulfides and benzene in fluid catalytic cracking gasoline. The resultant samples were characterized using XRD, TEM, XPS, TGA, H2-TPR, NH3-TPD and N2 adsorption/desorption techniques. XRD analysis indicated no agglomeration of Ni and La species, in good agreement with the TEM image...
September 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28926226/correlation-between-dissolved-protons-in-nickel-doped-bazr0-1ce0-7y0-1yb0-1o3-%C3%AE-and-its-electrical-conductive-properties
#6
Tomohiro Ishiyama, Haruo Kishimoto, Katherine Develos-Bagarinao, Katsuhiko Yamaji, Toshiaki Yamaguchi, Yoshinobu Fujishiro
The electrical conductivity of nickel (2 wt %)-doped BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb) acceptor-doped perovskite oxide was evaluated under air and a 1% H2 atmosphere. The partial conductivity was calculated from the total conductivity and the transport number of each carrier (tH(+), tO(2-), and th(+)) obtained using the concentration cell method. Its correlation with the dissolution state of the protons in the oxide as studied by in situ diffuse reflection Fourier transform infrared spectroscopy is discussed...
September 19, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28926046/long-range-magnetic-ordering-in-a-metal-organic-framework-based-on-octanuclear-nickel-ii-clusters
#7
Jun-Li Wang, Yan Bai, Hui Pan, Guang-Shui Zheng, Dong-Bin Dang
A novel three-dimensional metal-organic framework [Ni3(BTC)2(bpp)2(H2O)]·3H2O (1) based on mixed ligands H3BTC (1,2,4-benzenetricarboxylic acid) and bpp (1,3-bis(4-pyridyl)propane) was obtained under hydrothermal conditions. Crystal structure analysis reveals that 1 is a framework based on cage-like Ni8(COO)12 units. Furthermore, long-range magnetic ordering is observed at low temperature.
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28925491/corrosion-behavior-of-dental-implants-immersed-into-human-saliva-preliminary-results-of-an-in-vitro-study
#8
M Barbieri, F Mencio, P Papi, D Rosella, S Di Carlo, T Valente, G Pompa
OBJECTIVE: Over the years, different implant surfaces have been used to try to maximize bone to implant contact. The aim of this study was to compare levels of metallic ions and particles dissolution collected from two different dental implants surfaces immersed into human saliva. PATIENTS AND METHODS: A total of 60 dental implants were tested. Group A: sanded with aluminium oxide medium grade particles and acid-etched; Group B: micro-sanded with calcium phosphate powders and acid-etched...
August 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28924741/spectrum-of-infectious-diseases-among-newly-arrived-eritrean-refugees-in-switzerland-a-cross-sectional-study
#9
Afona Chernet, Andreas Neumayr, Christoph Hatz, Kerstin Kling, Véronique Sydow, Katharina Rentsch, Jürg Utzinger, Nicole Probst-Hensch, Hanspeter Marti, Beatrice Nickel, Niklaus D Labhardt
OBJECTIVES: Our study aimed at determining the prevalence of selected infectious diseases among recently arrived Eritrean refugees in Switzerland. METHODS: In this cross-sectional study, asymptomatic Eritrean migrants aged ≥16 years who arrived <24 months ago were recruited at refugee centres in Switzerland. Infectious disease screening included serology for HIV, hepatitis B and C, syphilis and schistosomiasis, polymerase chain reaction (PCR) for malaria, stool microscopy for helminths and intestinal protozoa and circulating cathodic antigen (CCA) testing in urine for schistosomiasis...
September 19, 2017: International Journal of Public Health
https://www.readbyqxmd.com/read/28921960/boron-difluoride-adducts-of-a-flexidentate-pyridine-substituted-formazanate-ligand-property-modulation-via-protonation-and-coordination-chemistry
#10
Stephanie M Barbon, Jasmine V Buddingh, Ryan R Maar, Joe B Gilroy
The synthesis and characterization of a flexidentate pyridine-substituted formazanate ligand and its boron difluoride adducts, formed via two different coordination modes of the title ligand, are described. The first adduct adopted a structure that was typical of other boron difluoride adducts of triarylformazanate ligands and contained a free pyridine subsituent, while the second was formed via the chelation of nitrogen atoms from the formazanate backbone and the pyridine substituent. Stepwise protonation of the pydridine-functionalized adduct, which is essentially nonemissive, resulted in a significant increase in the fluorescence quantum yield up to a maximum of 18%, prompting the study of this adduct as a pH sensor...
September 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28921953/new-antimony-selenide-nickel-oxide-photocathode-boosts-the-efficiency-of-graphene-quantum-dots-co-sensitized-solar-cell
#11
Ankita Kolay, Ramesh K Kokal, Ankarao Kalluri, Isaac Macwan, Prabir K Patra, Partha Ghosal, Melepurath Deepa
A novel assembly of a photocathode and photoanode is investigated to explore their complementary effects in enhancing the photovoltaic performance of a quantum dot solar cell (QDSC). While p-type nickel oxide (NiO) has been used previously, antimony selenide (Sb2Se3) has not been used in a QDSC, especially as a component of a counter electrode (CE) architecture that doubles up as the photocathode. Here, near infrared (NIR) light absorbing Sb2Se3 nanoparticles (NPs) coated over electrodeposited NiO nanofibers on a carbon (C)-fabric substrate was employed as the highly efficient photocathode...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28921439/purification-method-for-recombinant-hg-csf-by-affinity-chromatography
#12
Bruna Samham Archangelo, Elisa Maria de Sousa Russo
The human granulocytic colony-stimulating factor (hG-CSF) acts mainly by promoting the maturation of granulocytes and stimulating their phagocytic and chemotactic activity. It has been used in the treatment of many diseases, in particular in neutropenic conditions. Here, we describe the purification process of the recombinant protein hG-CSF expressed in Pichia pastoris. The protein purification proved to be efficient using the nickel affinity chromatography method described in this chapter.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28920984/tailoring-the-morphology-followed-by-the-electrochemical-performance-of-nimn-ldh-nanosheet-arrays-through-controlled-co-doping-for-high-energy-and-power-asymmetric-supercapacitors
#13
Saurabh Singh, Nanasaheb M Shinde, Qi Xun Xia, Chandu V V M Gopi, Je Moon Yun, Rajaram S Mane, Kwang Ho Kim
Herein, we tailor the surface morphology of nickel-manganese-layered double hydroxide (NiMn-LDH) nanostructures on 3D nickel-foam via a step-wise cobalt (Co)-doping hydrothermal chemical process. At the 10% optimum level of Co-doping, we noticed a thriving tuned morphological pattern of NiMn-LDH nanostructures (NiCoMn-LDH (10%)) in terms of the porosity of the nanosheet (NS) arrays which not only improves the rate capability as well as cycling stability, but also demonstrates nearly two-fold specific capacitance enhancement compared to Co-free and other NiCoMn-LDH electrodes with a half-cell configuration in 3 M KOH, suggesting that Co-doping is indispensable for improving the electrochemical performance of NiMn-LDH electrodes...
September 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28920824/baseline-health-and-nutrition-evaluation-of-two-sympatric-nocturnal-lemur-species-avahi-laniger-and-lepilemur-mustelinus-residing-near-an-active-mine-site-at-ambatovy-madagascar
#14
Randall E Junge, Cathy V Williams, Hajanirina Rakotondrainibe, Karine L Mahefarisoa, Tsiky Rajaonarivelo, Charles Faulkner, Vanessa Mass
Extractive industries can have significant impacts on ecosystems through loss of habitat, degradation of water quality, and direct impact on floral and faunal biodiversity. When operations are located in sensitive regions with high biodiversity containing endangered or threatened species, it is possible to minimize impact on the environment by developing programs to scientifically monitor the impact on resident flora and fauna species in the early phases of operation so that effects can be mitigated whenever possible...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28918377/stable-janus-superhydrophilic-hydrophobic-nickel-foam-for-directional-water-transport
#15
Yifan Si, Liwei Chen, Fuchao Yang, Fei Guo, Zhiguang Guo
Janus superhydrophilic/hydrophobic macroporous nickel foam for directional water transport has been demonstrated via a simple floating strategy. Water can transport from hydrophobic to superhydrophilic layer through Janus nickel foam, but cannot transfer from superhydrophilic to hydrophobic layer. This "3D water diode" Janus nickel foam shows extremely high transport rate and outstanding stability. After damaged by abrasion, its directional water transport property retains well.
September 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28918273/volatile-and-semivolatile-emissions-from-the-pyrolysis-of-almond-shell-loaded-with-heavy-metals
#16
M A Martín-Lara, N Ortuño, J A Conesa
Heavy metal-loaded almond shell was subjected to pyrolysis to understand the effect of the presence of different heavy metals on its thermal degradation. Pyrolysis behavior of native and metal-loaded samples was studied by thermogravimetric analysis. Similar shapes of thermogravimetric curves indicate that the presence of cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni) and lead (Pb) did not change the main degradation pathways of almond shell. However, the temperature at which the decomposition in each stage takes place at a higher rate and char yield was considerably modified by the presence of Cr and Ni...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28917711/crocodiles-and-alligators-antiamoebic-and-antitumor-compounds-of-crocodiles
#17
Ruqaiyyah Siddiqui, Shareni Jeyamogan, Salwa Mansoor Ali, Fatima Abbas, K A Sagathevan, Naveed Ahmed Khan
Crocodiles exist in unsanitary environments, feed on rotten meat, are often exposed to heavy metals such as arsenic, cadmium, cobalt, chromium, mercury, nickel, lead, selenium, tolerate high levels of radiation, and are amid the very few species to survive the catastrophic Cretaceous-Tertiary extinction event, nonetheless they can live for up to a 100 years. Moreover, as they live in unhygienic conditions, they regularly come across pathogens. Logically, we postulate that crocodiles have established mechanisms to defend themselves from noxious agents as well as protecting themselves from pathogens...
September 13, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28916897/improvement-of-quality-of-life-and-psychological-distress-after-inpatient-cancer-rehabilitation-results-of-a%C3%A2-longitudinal-observational-study
#18
David Riedl, Johannes M Giesinger, Lisa M Wintner, Fanny L Loth, Gerhard Rumpold, Richard Greil, Alain Nickels, Thomas Licht, Bernhard Holzner
BACKGROUND: With the growing number of cancer survivors worldwide the need for high quality cancer rehabilitation after primary treatment is steadily increasing. The aim of the present study was to investigate change of psychological distress and health-related quality of life (HRQOL) during multidisciplinary inpatient cancer rehabilitation in a large sample of cancer survivors suffering from different cancer entities. METHODS: We analyzed data from routine HRQOL and distress monitoring at a cancer inpatient rehabilitation center...
September 15, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28916349/offshore-iron-sand-extraction-in-new-zealand-potential-trace-metal-exposure-of-benthic-and-pelagic-biota
#19
Kay Vopel, Chris Pook, Peter Wilson, John Robertson
Plans to exploit an offshore source of iron sand in South Taranaki Bight (STB), New Zealand, caused concerns that such exploitation may expose benthic and pelagic biota to elevated trace metal concentrations. We conducted dilute-acid extractions and standard elutriate tests to investigate the potential of this exploitation to (1) create a new seafloor with elevated trace metal content, (2) mobilise trace metals during iron sand extraction and, (3) enrich the returning process seawater, which feeds iron sand through mills, with trace metals...
September 12, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28916319/inhibition-of-growth-and-biofilm-formation-of-clinical-bacterial-isolates-by-nio-nanoparticles-synthesized-from-eucalyptus-globulus-plants
#20
Samia Saleem, Bilal Ahmed, Mohammad Saghir Khan, Majed Al-Shaeri, Javed Musarrat
Nanotechnology based therapeutics has emerged as a promising approach for augmenting the activity of existing antimicrobials due to the unique physical and chemical properties of nanoparticles (NPs). Nickel oxide nanoparticles (NiO-NPs) have been suggested as prospective antibacterial and antitumor agent. In this study, NiO-NPs have been synthesized by a green approach using Eucalyptus globulus leaf extract and assessed for their bactericidal activity. The morphology and purity of synthesized NiO-NPs determined through various spectroscopic techniques like UV-Visible, FT-IR, XRD, EDX and electron microscopy differed considerably...
September 12, 2017: Microbial Pathogenesis
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