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https://www.readbyqxmd.com/read/28536910/development-of-modis-data-based-algorithm-for-retrieving-sea-surface-temperature-in-coastal-waters
#1
Jiao Wang, Zhiqiang Deng
A new algorithm was developed for retrieving sea surface temperature (SST) in coastal waters using satellite remote sensing data from Moderate Resolution Imaging Spectroradiometer (MODIS) aboard Aqua platform. The new SST algorithm was trained using the Artificial Neural Network (ANN) method and tested using 8 years of remote sensing data from MODIS Aqua sensor and in situ sensing data from the US coastal waters in Louisiana, Texas, Florida, California, and New Jersey. The ANN algorithm could be utilized to map SST in both deep offshore and particularly shallow nearshore waters at the high spatial resolution of 1 km, greatly expanding the coverage of remote sensing-based SST data from offshore waters to nearshore waters...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28532108/assessing-stiffness-of-nanofibres-in-bacterial-cellulose-hydrogels-numerical-experimental-framework
#2
Xing Gao, Emrah Sozumert, Zhijun Shi, Guang Yang, Vadim V Silberschmidt
This work presents a numerical-experimental framework for assessment of stiffness of nanofibres in a fibrous hydrogel - bacterial cellulose (BC) hydrogel - based on a combination of in-aqua mechanical testing, microstructural analysis and finite-element (FE) modelling. Fibrous hydrogels attracted growing interest as potential replacements to some tissues. To assess their applicability, a comprehensive understanding of their mechanical response under relevant conditions is desirable; a lack of such knowledge is mainly due to changes at microscale caused by deformation that are hard to evaluate in-situ because of the dimensions of nanofibres and aqueous environment...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532069/photothermal-conversion-efficiency-and-cytotoxic-effect-of-gold-nanorods-stabilized-with-chitosan-alginate-and-poly-vinyl-alcohol
#3
M Almada, B H Leal-Martínez, N Hassan, M J Kogan, M G Burboa, A Topete, M A Valdez, J Juárez
Gold nanorods (GNR) use has been proposed in medical applications because of their intrinsic photothermal properties. However, the presence of CTAB molecules adsorbed onto the surface of GNRs results in a highly cytotoxic GNR system. In this work we replace the CTAB molecules with a thiolated chitosan. Once chitosan coated GNRs (Chi-SH-GNR) were attained, a film of alginate (Alg-Chi-SH-GNR) or polyvinyl alcohol (PVA-Chi-SH-GNR) was deposited onto the surface of Chi-GNR by a layer-by-layer process. The photothermal conversion efficiency for the GNR systems was determined irradiating the GNRs suspended in aqua media with a CW 808nm diode laser (CNI, China)...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529797/crystal-structure-of-aqua-trans-bis-dimethyl-sulfoxide-%C3%AE%C2%BAo-pyridine-2-6-di-carboxyl-ato-%C3%AE%C2%BA-3-o-2-n-o-6-nickel-ii
#4
Chen Liu, Ashley C Felts, Daisuke Takahashi, Wesley S Kinden, Khalil A Abboud
In the title complex, [Ni(C7H3NO4)(C2H6OS)2(H2O)], the Ni(II) cation is situated on a twofold rotation axis and exhibits a distorted octa-hedral NO5 coordination environment defined by a tridentate pyridine-2,6-di-carb-oxy-lic acid dianion (dpa(2-)), two dimethyl sulfoxide (DMSO) mol-ecules, and a water mol-ecule. In the crystal, the complex mol-ecules are linked by O-H⋯O and C-H⋯O hydrogen bonds into a three-dimensional network whereby DMSO mol-ecules from neighboring complexes overlap to form layers parallel to (001), alternating with layers of Ni(II)-dpa(2-) moieties...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529781/crystal-structure-of-catena-poly-di-aqua-bis-2-4-6-tri-methyl-benzoato-%C3%AE%C2%BAo-cobalt-ii-%C3%AE-aqua-%C3%AE%C2%BA-2-o-o-dihydrate
#5
Tuncer Hökelek, Nurcan Akduran, Safiye Özkaya, Hacali Necefoğlu
The asymmetric unit of the title one-dimensional polymeric compound, {[Co(C10H11O2)2(H2O)3]·2H2O} n , contains one Co(II) cation situated on a centre of inversion, one-half of a coordinating water mol-ecule, one 2,4,6-tri-methyl-benzoate (TMB) anion together with one coordinating and one non-coordinating water mol-ecule; the TMB anion acts as a monodentate ligand. In the anion, the carboxyl-ate group is twisted away from the attached benzene ring by 84.9 (2)°. The Co(II) atom is coordinated by two TMB anions and two water mol-ecules in the basal plane, while another water mol-ecule bridges the Co(II) atoms in the axial directions, forming polymeric chains running along [001]...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28522282/quality-indicators-for-the-use-of-systemic-antibiotics-in-dentistry
#6
Rugzan Jameel Hussein, Robert Krohn, Petra Kaufmann-Kolle, Gerald Willms
BACKGROUND: Risks resulted from using systemic antibiotics such as increasing rates of bacterial resistance, allergy and side effects should be always weighed individually for each patient against any potential benefits. Routine antibiotic prescribing must be therefore discouraged. The Federal Joint Committee ("Gemeinsamer Bundesauschuss", G-BA) commissioned the AQUA-Institute with the development of an external quality assurance procedure, examining systemic antibiotic use in periodontal, conservative and surgical treatments in ambulatory dental health care...
May 15, 2017: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/28520196/environmentally-friendly-recycling-of-fuel-cell-s-membrane-electrode-assembly-using-ionic-liquids
#7
Sophie Legeai, Maxime Balva, Nathalie Leclerc, Emmanuel Billy, Eric Meux
The platinum nanoparticles used as catalyst in Proton Exchange Membrane Fuel Cells (PEMFCs) could represent around 46 % of the total price of the cells1 for a large scale production which is one of the limitation of their commercialization. The recycling of this platinum catalyst can then be the best alternative to limit the production cost of PEMFCs. Usual recovery routes for spent catalysts containing platinum are pyro-hydrometallurgical processes in which a calcination step is followed by aqua regia treatment, generating fumes and NOx emission, respectively...
May 18, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28518076/facile-preparation-of-ultrafine-aluminum-hydroxide-particles-with-or-without-mesoporous-mcm-41-in-ambient-environments
#8
Viktor Dubovoy, Ravi Subramanyam, Michael Stranick, Laurence Du-Thumm, Long Pan
An aqueous suspension of nanogibbsite was synthesized via the titration of aluminum aqua acid [Al(H2O)6](3+) with L-arginine to pH 4.6. Since the hydrolysis of aqueous aluminum salts is known to produce a wide array of products with a wide range of size distributions, a variety of state-of-the-art instruments (i.e., (27)Al/(1)H NMR, FTIR, ICP-OES, TEM-EDX, XPS, XRD, and BET) were used to characterize the synthesis products and identification of byproducts. The product, which was comprised of nanoparticles (10-30 nm), was isolated using gel permeation chromatography (GPC) column technique...
May 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28493678/deciphering-the-structural-relationships-of-five-cd-based-metal-organic-frameworks
#9
Feng-Ling Yuan, Yan-Qiu Yuan, Meng-Yao Chao, David J Young, Wen-Hua Zhang, Jian-Ping Lang
The one-pot reaction of Cd(NO3)2·4H2O and 5-(6-(hydroxymethyl)pyridin-3-yl)isophthalic acid (H2L) in DMF/H2O (DMF = N,N-dimethylformamide) produced a two-dimensional (2D) metal-organic framework (MOF) of [Cd(L)(H2O)2] (A) bearing aqua-bridged Cd centers, accompanied by two three-dimensional (3D) MOFs [Cd(L)(DMF)0.5] (B) and [Cd(L)] (C). Removing the bridging aqua molecules of A by heating led to the formation of an additional 3D MOF of [Cd(L)] (D) in a single-crystal to single-crystal (SCSC) manner. The search for the preceding compound that could convert to A resulted in the isolation of a 2D MOF [Cd(L)(DMF)] (E) that readily converted to A in water, but with the loss of single crystallinity...
May 11, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28477255/proposal-of-new-convenient-extractant-for-assessing-phytoavailability-of-heavy-metals-in-contaminated-sandy-soil
#10
Jolanta Korzeniowska, Ewa Stanislawska-Glubiak
The aim of the study was to compare the usefulness of 1 M HCl with aqua regia, EDTA, and CaCl2 for the extraction of phytoavailable forms of Cu, Ni, and Zn on coarse-textured soils contaminated with these metals. Two microplot experiments were used for the studies. Reed canary grass (Phalaris arundinacea), maize (Zea mays), willow (Salix viminalis), spartina (Spartina pectinata), and miscanthus (Miscanthus × giganteus) were used as test plants. They were grown on soil artificially spiked with Cu, Ni, and Zn...
May 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28472210/ocular-chemical-burns-secondary-to-unintentional-instillation-of-aqua-regia-hobbyist-reagent-not-all-that-glitters-is-gold
#11
Thomas V Johnson, Ravi R Pandit, Robert S Weinberg
No abstract text is available yet for this article.
May 4, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28469070/two-cadmium-ii-fluorous-coordination-compounds-tuned-by-different-bipyridines
#12
Ya Jie Kong, Peng Li, Li Juan Han, Lu Tong Fan, Peng Peng Li, Shuang Yin
Fluorine is the most electronegative element and can be used as an excellent hydrogen-bond acceptor. Fluorous coordination compounds exhibit several advantageous properties, such as enhanced high thermal and oxidative stability, low polarity, weak intermolecular interactions and a small surface tension compared to hydrocarbons. C-H...F-C interactions, although weak, play a significant role in regulating the arrangement of the organic molecules in the crystalline state and stabilizing the secondary structure...
May 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28469062/a-novel-three-dimensional-sr-ii-coordination-polymer-based-on-benzene-1-2-4-5-tetracarboxylate-hydrothermal-synthesis-crystal-structure-and-spectroscopic-and-thermal-studies
#13
Chahrazed Trifa, Samia Mokhtari, Sofiane Bouacida, Chaouki Boudaren, Mhamed Boudraa, Hocine Merazig
Coordination of the anions of benzenecarboxylic acids with metal cations leads to coordination polymers with various structural features. Very few examples of strontium-based structures have been reported. A new three-dimensional coordination polymer, namely poly[aqua(μ12-benzene-1,2,4,5-tetracarboxylato)distrontium(II)], [Sr2(C10H2O8)(H2O)]n, has been synthesized under hydrothermal conditions and characterized by thermal analysis, vibrational spectroscopy (Raman and IR), single-crystal X-ray diffraction and powder X-ray diffraction...
May 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28460361/hydrolysis-of-the-amide-bond-in-histidine-and-methionine-containing-dipeptides-promoted-by-pyrazine-and-pyridazine-palladium-ii-aqua-dimers-comparative-study-with-platinum-ii-analogues
#14
Marija D Živković, Snežana Rajković, Biljana Đ Glišić, Nenad S Drašković, Miloš I Djuran
Two dinuclear palladium(II) complexes, [{Pd(en)Cl}2(μ-pz)](NO3)2 and [{Pd(en)Cl}2(μ-pydz)](NO3)2, have been synthesized and characterized by elemental microanalysis and spectroscopic ((1)H and (13)C NMR, IR and UV-vis) techniques (en is ethylenediamine; pz is pyrazine and pydz is pyridazine). The square planar geometry of palladium(II) metal centers in these complexes has been predicted by DFT calculations. The chlorido complexes were converted into the corresponding aqua complexes, [{Pd(en)(H2O)}2(μ-pz)](4+) and [{Pd(en)(H2O)}2(μ-pydz)](4+), and their reactions with N-acetylated l-histidylglycine (Ac-l-His-Gly) and l-methionylglycine (Ac-l-Met-Gly) were studied by (1)H NMR spectroscopy...
April 17, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28459792/collaborative-quality-improvement
#15
Amy N Luckenbaugh, David C Miller, Khurshid R Ghani
PURPOSE OF REVIEW: Quality improvement collaboratives were developed in many medical and surgical disciplines with the goal of measuring and improving the quality of care provided to patients. The aim of this review is to provide an overview of surgical quality improvement collaboratives, and in particular those aimed at improving urological care. RECENT FINDINGS: Quality improvement collaboratives collect high-quality data using standardized methodologies, and use the data to provide feedback to physicians and practices, and then implement processes to improve patient outcomes...
April 28, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28459701/mecom-evi1-rearrangements-a-review-and-case-report-of-two-mds-patients-with-complex-3q-inversion-deletions
#16
Helen Lawce, Elina Szabo, Yumi Torimaru, Craig Davis, Karin Osterberg, Susan Olson, Steve Moore
Acute myelogeneous leukemia (AML) with inv(3)/t(3;3)(q13q25) is associated with aberrant expression of the stem-cell regulator MECOM (aka EVI1). Two bone marrow samples received in the OHSU Knight Diagnostic Laboratories (KDL) Cytogenetics Laboratory for chromosomes and FISH for a question of progression of myelodysplastic syndrome (MDS) to AML showed complex abnormalities including a deletion of chromosome 3q, one with del(3)(q13q25) and the other with del(3)(q22q25). In light of the prognostic importance of the activation of the MECOM oncogene and the concurrent inactivation of the GATA2 tumor suppressor that occurs with the classic inversion of chromosome 3q, fluorescence in situ hybridization (FISH) was performed using two different probe designs to better define the 3q deletions in the two cases...
2017: Journal of the Association of Genetic Technologists
https://www.readbyqxmd.com/read/28454676/effects-of-monosulfuron-ester-on-metabolic-processes-of-nitrogen-fixing-cyanobacteria-anabaena-flos-aquae-and-anabaena-azotica
#17
Jian Ying Shen, Jin Zhi Liao, Li Li Guo, Rui Fang Su
Presence of the relatively new sulfonylurea herbicide monosulfuron-ester at 0.03-300nmol/L affected the growth of two non-target nitrogen-fixing cyanobacteria (Anabaena flos-aquae and Anabaena azotica) and substantially inhibited in vitro Acetolactate synthase activity, with IC50 of 3.3 and 101.3nmol/L for A. flos-aquae and A. azotica, respectively. Presenting in 30-300nmol/L, it inhibited protein synthesis of the cyanobacteria with less amino acids produced as its concentration increased. Our findings support the view that monosulfuron-ester toxicity in both nitrogen-fixing cyanobacteria is due to its interference with protein metabolism via inhibition of branch-chain amino acid biosynthesis, and particularly Acetolactate synthase activity...
March 11, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28451184/combatting-amr-photoactivatable-ruthenium-ii-isoniazid-complex-exhibits-rapid-selective-antimycobacterial-activity
#18
Nichola A Smith, Pingyu Zhang, Simon E Greenough, Michael D Horbury, Guy J Clarkson, Daniel McFeely, Abraha Habtemariam, Luca Salassa, Vasilios G Stavros, Christopher G Dowson, Peter J Sadler
The novel photoactive ruthenium(ii) complex cis-[Ru(bpy)2(INH)2][PF6]2 (1·2PF6, INH = isoniazid) was designed to incorporate the anti-tuberculosis drug, isoniazid, that could be released from the Ru(ii) cage by photoactivation with visible light. In aqueous solution, 1 rapidly released two equivalents of isoniazid and formed the photoproduct cis-[Ru(bpy)2(H2O)2](2+) upon irradiation with 465 nm blue light. We screened for activity against bacteria containing the three major classes of cell envelope: Gram-positive Bacillus subtilis, Gram-negative Escherichia coli, and Mycobacterium smegmatis in vitro using blue and multi-colored LED multi-well arrays...
January 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28441214/the-osteo-odonto-keratoprosthesis
#19
Mehran Zarei-Ghanavati, Venkata Avadhanam, Alfonso Vasquez Perez, Christopher Liu
PURPOSE OF REVIEW: To describe the practice of and recent developments in the osteo-odonto-keratoprosthesis. RECENT FINDINGS: Formal psychological assessment and support have been described. A sub-aqua system for fashioning the osteo-odonto-keratoprosthesis lamina; adoption of thicker laminae; use of bisphosphonate drugs; advances in laminar imaging; and use of bone augmentation and bone morphogenetic protein have been described for prevention, detection, and management of laminar resorption...
April 24, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28439978/simulation-of-commercial-vs-theoretically-optimised-contact-lenses-for-presbyopia
#20
Richard Legras, David Rio
PURPOSE: To compare theoretically optimised bifocal contact lens optical designs to commercially available optical designs for presbyopia. METHODS: Retinal images were simulated, using a numerical eye model, from -6 (i.e., near vision) to +2 D for each 0.25 D. Ten optical profiles were simulated. Four of them corresponded to commercial contact lenses (i.e., Acuvue Oasys for Presbyopia®, Air Optix Aqua Multifocal®, Purevision Multifocal® and Distance Biofinity Multifocal®)...
May 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
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