keyword
MENU ▼
Read by QxMD icon Read
search

phosphore

keyword
https://www.readbyqxmd.com/read/28812352/ca-%C3%AE-sialon-eu-phosphors-oxidation-states-energy-transfer-and-emission-enhancement-by-incorporation-aimed-surface-engineering
#1
Xiangyang Chen, Lin Gan, Zhi-Jun Zhang, Ping Lu, Xionghui Zeng, Linlin Zhang, Heliang Yao, FangFang Xu, Jing-Tai Zhao
Ca-α-SiAlON: Eu is one of the most promising phosphors exhibiting potential applications in high power LEDs owing to its excellent thermal stability and relative high luminescence efficiency comparable to YAG: Ce commercial phosphors. The oxidation states of Eu ions in Ca-α-SiAlON: Eu are still questionable and furthermore it yet exhibits lower luminescence intensity than commercial yellow phosphors. Therefore, in the present work, the valances of Eu ions in Ca-α-SiAlON have been examined which observed a mixture of divalence and trivalence...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28812080/computational-design-of-ph-switchable-control-agents-for-nitroxide-mediated-polymerization
#2
Ganna Gryn'ova, Leesa M Smith, Michelle L Coote
In the present work we use accurate quantum chemistry to evaluate several known and novel nitroxides bearing acid-base groups as pH-switchable control agents for room temperature NMP. Based on G3(MP2,CC)(+)//M06-2X/6-31+G(d) calculations with UAKS-CPCM/M06-2X/6-31+G(d) solvation corrections, a number of novel nitroxides are predicted to be suitable for controlled polymerization of bulk styrene at room temperature when deprotonated (i.e. negatively charged), while remaining inert when neutral. These include an α-ethyl analogue of 3-carboxy-PROXYL and novel derivatives of 2,2,5-trimethyl-4-phenyl-3-azahexane-3-nitroxide (TIPNO) that have been modified to include acidic groups...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28809566/carbon-phosphorous-bond-formation-on-anilines-mediated-by-a-hypervalent-iodine-reagent
#3
Elsa Deruer, Siomenan Coulibali, Saad Boukercha, Sylvain Canesi
Substituted anilines containing a sulfonyl group may be oxidized in situ in the presence of methanol and a hypervalent iodine reagent to form an active iminium species. Subsequent addition of phosphines or phosphites in the same pot produces meta-substituted anilines in good yields. This formal C-H bond functionalization is a direct and efficient means of selectively substituting the meta-position of anilines to produce aromatic phosphonium ions or phosphonates.
August 15, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28809551/direct-speciation-analysis-of-arsenic-in-whole-blood-and-blood-plasma-at-low-exposure-levels-by-hydride-generation-cryotrapping-inductively-coupled-plasma-mass-spectrometry
#4
Tomáš Matoušek, Zhifeng Wang, Christelle Douillet, Stanislav Musil, Miroslav Stýblo
A method for analysis of toxicologically important arsenic species in blood plasma and whole blood by selective hydride generation with cryotrapping (HG-CT) coupled either to atomic absorption (AAS) with a quartz multiatomizer or to inductively coupled plasma mass spectrometry (ICP-MS) has been validated. Sample preparation which involved only 5 times dilution with addition of Triton X-100, Antifoam B and L-cysteine suppressed excessive foaming in a hydride generator. Calibration slopes for whole blood and blood plasma spiked with arsenate, monomethylarsonate and dimethylarsinate at 0...
August 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28809505/relay-catalysis-manganese-iii-phosphate-catalyzed-asymmetric-addition-of-%C3%AE-dicarbonyls-to-ortho-quinone-methides-generated-by-catalytic-aerobic-oxidation
#5
Konrad Gebauer, Franziska Reuß, Matthias Spanka, Christoph Schneider
The combination of an in situ formed MnL3 complex (HL = Hacac or R(C═O)CH2CO2R) and a chiral phosphoric acid HX* allows for a fully catalytic, asymmetric synthesis of 4H-chromenes starting from 2-alkyl-substituted phenols. The aerobic oxidation toward a transient ortho-quinone methide was efficiently catalyzed by a manganese(III) species MnL3 while the ensuing Michael addition of β-dicarbonyl compounds proved to be catalyzed by a chiral manganese phosphate MnL2X*.
August 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/28809050/versatile-chromatographic-method-for-catechin-determination-in-development-of-topical-formulations-containing-natural-extracts
#6
Ricardo Ferreira-Nunes, Tamara Angelo, Sandra Márcia Mazutti da Silva, Pérola Oliveira Magalhães, Tais Gratieri, Marcílio Sérgio Soares da Cunha-Filho, Guilherme Martins Gelfuso
Catechin is found in several natural sources, as Eugenia dysenterica and Syzygium cumini extracts. Its antioxidant and UV-protective properties suggest a potential use in cosmetic and dermatological formulations. A simple analytical method capable of giving support to experiments performed along the development of topical formulations containing this natural substance (i.e., drug assay, skin permeation and stability studies), however, is still demanded. Thus, this work aimed to develop and validate a selective HPLC method for catechin determination during the development of topical formulations...
August 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28806532/the-impact-of-an-acute-oral-phosphate-load-on-endothelium-dependent-and-independent-brachial-artery-vasodilation-in-healthy-males
#7
Brendan M Levac, Michael A Adams, Kyra E Pyke
Serum phosphate levels are associated with cardiovascular morbidity and mortality in the general population and endothelial dysfunction may be mechanistically involved. The purpose of this study was to investigate the effects of acute phosphate supplementation on endothelial-dependent (Flow mediated dilation (FMD)) and -independent (Glyceryl trinitrate (GTN)) vasodilation in young, healthy males. 17 healthy male participants (23±3 years old) were exposed to an oral load of phosphate (PHOS; (liquid supplement containing 1200 mg of phosphorous) and placebo (PLAC) over two experimental days...
August 14, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28804691/combination-of-celecoxib-celebrex-%C3%A2-and-cd19-car-redirected-ctl-immunotherapy-for-the-treatment-of-b-cell-non-hodgkin-s-lymphomas
#8
REVIEW
Tam Nm Dinh, Alexandra S Onea, Ali R Jazirehi
The nonsteroidal anti-inflammatory drug (NSAID) Celecoxib (Celebrex(®)) received Food and Drug Administration (FDA) approval in 1998 for treatment of osteoarthritis and rheumatoid arthritis, and in recent years, its use has been extended to various types of malignancies, such as breast, colon, and urinary cancers. To maintain the survival of malignant B cells, non-Hodgkin's Lymphoma (NHL) is highly dependent on inflammatory microenvironment, and is inhibited by celecoxib. Celecoxib hinders tumor growth interacting with various apoptotic genes, such as cyclooxygenase-2 (Cox-2), B-cell lymphoma 2 (Bcl-2) family, phosphor-inositide-3 kinase/serine-threonine-specific protein kinase (PI3K/Akt), and inhibitors of apoptosis proteins (IAP) family...
2017: American Journal of Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28804610/naringin-enhances-osteogenic-differentiation-through-the-activation-of-erk-signaling-in-human-bone-marrow-mesenchymal-stem-cells
#9
Huichao Wang, Chunbo Li, Jianming Li, Yingjie Zhu, Yudong Jia, Ying Zhang, Xiaodong Zhang, Wenlong Li, Lei Cui, Wuyin Li, Youwen Liu
OBJECTIVES: Naringin has been reported to regulate bone metabolism. However, its effect on osteogenesis remains unclear. The aim was to investigate the effect of naringin on osteogenic differentiation of human bone marrow mesenchymal stem cells (hBMSCs) through the activation of the ERK signaling pathway in osteogenic differentiation. MATERIALS AND METHODS: Annexin V-FITC assay and MTT assay were used to measure the effect of naringin on cytotoxicity and proliferation of hBMSCs, respectively...
April 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28803381/effect-of-soil-ph-and-organic-matter-on-the-adsorption-and-desorption-of-pentachlorophenol
#10
Shui-Wen Chang Chien, Shou-Hung Chen, Chi-Jui Li
Various properties of soil affect the partition of organic contaminants within, and conversely, the properties of the organic contaminants also directly affect their partition behavior in soil. Therefore, understanding the effects of various properties of soil on the partition of organic contaminants favors subsequent assessment and provides soil remediation methods for policymakers. This study selected pentachlorophenol (PCP), a common hydrophobic ionizable organic compound in contaminated sites worldwide, as the target contaminant...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803098/simultaneous-removal-of-nitrogen-and-phosphorous-from-domestic-wastewater-using-bacillus-cereus-gs-5-strain-exhibiting-heterotrophic-nitrification-aerobic-denitrification-and-denitrifying-phosphorous-removal
#11
Prangya Ranjan Rout, Puspendu Bhunia, Rajesh Roshan Dash
A newly isolated GS-5 strain exhibiting heterotrophic nitrification, aerobic denitrification and denitrifying phosphorous removal was identified as Bacillus cereus GS-5 based on its phenotypic and phylogenetic characteristics. The isolate had exhibited efficient NH4(+)-N, NO3(-)-N, NO2(-)-N and PO4(3-)-P removal from nutrient spiked real domestic wastewater with average rates of 2.62, 2.69, 1.16 and 0.42mgL(-1)h(-1), respectively under aerobic condition. Metabolic inhibitor based mass balance analysis indicated that dinitrogen gas (41%), intracellular nitrogen (29%) and intracellular phosphorous (60%) were the major fates of the initial NH4(+)-N and PO4(3-)-P...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28801773/growth-performance-mineral-digestibility-and-blood-characteristics-of-ostriches-receiving-drinking-water-supplemented-with-varying-levels-of-chelated-trace-mineral-complex
#12
Hossein Seyfori, Hossein Ali Ghasemi, Iman Hajkhodadadi, Mohammad Hassan Nazaran, Maryam Hafizi
The effects of water supplementation of chelated trace minerals (CTM, which is named Bonzaplex designed with chelate compounds technology) on growth performance, apparent total tract digestibility (ATTD) of minerals, and some blood metabolites, TM, and antioxidant enzyme values in African ostriches were investigated from 8 to 12 months of age. A total of 20 8-month-old ostriches (five birds in five replicate pens) was randomly allocated into one of the following four treatments: (1) control (basal diet + tap water), (2) low CTM (basal diet +100 mg/bird/day CTM powder in tap water), (3) medium CTM (basal diet +1 g/bird/day CTM powder in tap water), and (4) high CTM (basal diet +2 g/bird/day CTM powder in tap water)...
August 11, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28799594/the-photoluminescence-thermal-properties-and-tunable-color-of-na1-xal1-2xsi1-2xo4-xce-3-tb-3-dy-3-via-energy-transfer-a-single-component-multicolor-emitting-phosphor
#13
Chengyi Xu, Yanhua Song, Hongxia Guan, Ye Sheng, Pingchuan Ma, Xiuqing Zhou, Zhan Shi, Haifeng Zou
A series of emission-tunable Na1-xAl1+2xSi1-2xO4:xCe(3+)/Tb(3+)/Dy(3+) phosphors were synthesized via a high temperature solid-state reaction method. Luminescence properties, energy transfer from Ce(3+) to Tb(3+) or Dy(3+) ions, color tuning and thermal stability were systematically investigated. Particularly, the charge compensating defect generated by doping of rare earth ions was remedied through Al(3+) substituted Si(4+). Meanwhile, the emission intensity was significantly improved. The presence and content of various elements were demonstrated through data combined with the crystallographic data from Rietveld refinements and the analysis of SEM and mapping for each element...
August 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28796502/sky-blue-emitting-iridium-iii-complexes-bearing-nonplanar-tetradentate-chromophore-and-bidentate-ancillary
#14
Yu-Sian Li, Jia-Ling Liao, Ke-Ting Lin, Wen-Yi Hung, Shih-Hung Liu, Gene-Hsiang Lee, Pi-Tai Chou, Yun Chi
Tetradentate chelates bearing tripodal arranged terpyridine and a functional pyrazole unit (i.e., L1-H and L2-H) were employed in preparation of Ir(III) complexes [Ir(L1)Cl2] (1) and [Ir(L2)Cl2] (2); subsequent chloride-to-bipyrazolate substitution gave [Ir(L1)(bipz)] (3) and [Ir(L2)(bipz)] (4). Single-crystal X-ray structural studies on 1 and 3 showed the possession of a tetradentate chelate, whereas the remaining cis-sites are occupied by either dual chlorides or the bipz chelate, respectively. Sky blue organic light-emitting diode with peak efficiencies (10...
August 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28796498/the-inductive-effect-of-neighboring-cations-in-tuning-luminescence-properties-of-the-solid-solution-phosphors
#15
Wenge Xiao, Dan Wu, Liangliang Zhang, Xia Zhang, Zhendong Hao, Guo-Hui Pan, Ligong Zhang, Xuewei Ba, Jiahua Zhang
Forming solid solutions through cation substitution is an efficient way to improve the luminescence properties of Ce(3+) or Eu(2+) activated phosphors and even to develop new ones, which is badly needed for phosphor-converted white LEDs. Here, we report new color tunable solid solution phosphors based on Eu(2+) activated K2Al2B2O7 as a typical case to demonstrate that, besides crystal field splitting of 5d levels, centroid shift and Stokes shift can be dominant in tuning excitation and emission spectra as well as thermal stability of solid solution phosphors, both of which were previously considered to be negligible...
August 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28795817/achieving-high-performances-of-nondoped-oleds-using-carbazole-and-diphenylphosphoryl-functionalized-ir-iii-complexes-as-active-components
#16
Hui-Ting Mao, Chun-Xiu Zang, Guo-Gang Shan, Hai-Zhu Sun, Wen-Fa Xie, Zhong-Min Su
Nondoped electroluminescent devices offer advantages over their doped counterparts such as good reproducibility, reduced phase separation between host and guest materials, and potential of lower-cost devices. However, low luminance efficiencies and significant roll-off values are longstanding issues for nondoped devices, and a rational design strategy for the preparation of efficient phosphors is highly desired. In this work, cyclometalated Ir(III) complexes 3CzIr(mtpy), 4CzIr(mtpy), 3POIr(mtpy), and 4POIr(mtpy) bearing carbazole (Cz) or diphenylphosphoryl (Ph2PO) groups substituted at different positions of 1,2-diphenyl-H-benzimidazole (HPBI) were designed and synthesized...
August 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28795167/effective-uv-ozone-irradiation-method-for-decontamination-of-hydroxyapatite-surfaces
#17
Keisuke Yasuda, Yohei Okazaki, Yasuhiko Abe, Kazuhiro Tsuga
The purpose of this study was to establish whether UV/ozone (O3) irradiation method can effectively decontaminate hydroxyapatite surfaces, including those modified by the treatment with 30% phosphoric acid solution through morphological and chemical surface analyses (surface roughness, X-ray photoelectron spectroscopy and wettability), and to evaluate the in vitro response of osteoblast-like MC3T3-E1 cells to the modified hydroxyapatite surface decontaminated via this method. The amount of carbon and the contact angle of hydroxyapatite surfaces were significantly decreased by UV/O3 irradiation that lasted for ≥ 5 and ≥ 3 min, respectively (P < 0...
August 2017: Heliyon
https://www.readbyqxmd.com/read/28790306/quantitative-diagnostic-imaging-of-cancer-tissues-by-using-phosphor-integrated-dots-with-ultra-high-brightness
#18
Kohsuke Gonda, Mika Watanabe, Hiroshi Tada, Minoru Miyashita, Yayoi Takahashi-Aoyama, Takashi Kamei, Takanori Ishida, Shin Usami, Hisashi Hirakawa, Yoichiro Kakugawa, Yohei Hamanaka, Ryuichi Yoshida, Akihiko Furuta, Hisatake Okada, Hideki Goda, Hiroshi Negishi, Kensaku Takanashi, Masaru Takahashi, Yuichi Ozaki, Yuka Yoshihara, Yasushi Nakano, Noriaki Ohuchi
The quantitative sensitivity and dynamic range of conventional immunohistochemistry (IHC) with 3,3'-diaminobenzidine (IHC-DAB) used in pathological diagnosis in hospitals are poor, because enzyme activity can affect the IHC-DAB chromogenic reaction. Although fluorescent IHC can effectively increase the quantitative sensitivity of conventional IHC, tissue autofluorescence interferes with the sensitivity. Here, we created new fluorescent nanoparticles called phosphor-integrated dots (PIDs). PIDs have 100-fold greater brightness and a more than 300-fold greater dynamic range than those of commercially available fluorescent nanoparticles, quantum dots, whose fluorescence intensity is comparable to tissue autofluorescence...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783866/hematologic-and-plasma-chemistry-ris-for-cultured-striped-catfish-pangasius-hypophthalmus-in-recirculating-aquaculture-systems
#19
Oscar A Galagarza, David D Kuhn, Stephen A Smith, Terry C Hrubec
BACKGROUND: Striped catfish (Pangasius hypophthalmus) is a valuable aquaculture fish species produced primarily in Southeast Asia. In the United States, it is bred as an ornamental species. Striped catfish has high productivity and great demand in numerous countries around the world, yet little is known about its normal physiology. OBJECTIVES: The objective of this study was to establish hematologic and blood chemistry RIs for healthy juvenile Striped catfish. METHODS: Blood samples were collected from 70 Striped catfish raised in recirculating aquaculture systems...
August 7, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28782897/introduction-of-red-green-blue-fluorescent-dyes-into-a-metal-organic-framework-for-tunable-white-light-emission
#20
Yuehong Wen, Tianlu Sheng, Xiaoquan Zhu, Chao Zhuo, Shaodong Su, Haoran Li, Shengmin Hu, Qi-Long Zhu, Xintao Wu
The unique features of the metal-organic frameworks (MOFs), including ultrahigh porosities and surface areas, tunable pores, endow the MOFs with special utilizations as host matrices. In this work, various neutral and ionic guest dye molecules, such as fluorescent brighteners, coumarin derivatives, 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM), and 4-(p-dimethylaminostyryl)-1-methylpyridinium (DSM), are encapsulated in a neutral MOF, yielding novel blue-, green-, and red-phosphors, respectively...
August 7, 2017: Advanced Materials
keyword
keyword
58808
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"