The Experts below are selected from a list of 3354 Experts worldwide ranked by ideXlab platform
Linford J Campbell - One of the best experts on this subject based on the ideXlab platform.
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radiochemical and chemical Constituents in water from selected wells and springs from the southern boundary of the idaho national engineering and environmental laboratory to the hagerman area idaho 1998
Other Information: PBD: 1 Dec 1998, 1999Co-Authors: Roy C Bartholomay, L M Williams, Linford J CampbellAbstract:The US Geological Survey and the Idaho Department of Water Resources, in cooperation with the US Department of Energy, sampled 19 sites as part of the fourth round of a long-term project to monitor water quality of the Snake river Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for selected radiochemical and chemical Constituents. The samples were collected from nine irrigation wells, three domestic wells, two dairy wells, two springs, one commercial well, one stock well, and one observation well. Two quality-assurance samples also were collected and analyzed. Additional sampling at six sites was done to complete the third round of sampling. None of the radiochemical or chemical Constituents exceeded the established maximum contaminant levels for drinking water. Many of the radionuclide- and Inorganic-Constituent concentrations were greater than their respective reporting levels.
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evaluation of radionuclide Inorganic Constituent and organic compound data from selected wells and springs from the southern boundary of the idaho national engineering laboratory to the hagerman area idaho 1989 1992
Other Information: PBD: Jan 1997, 1997Co-Authors: Roy C Bartholomay, L M Williams, Linford J CampbellAbstract:The U.S. Geological Survey and the Idaho Department of Water Resources, in cooperation with the U.S. Department of Energy, evaluated the water quality data collected from 55 wells and springs during 1989 and 1990 through 1992 from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area, Idaho. Water samples collected in 1989-92 were analyzed for selected radionuclides, Inorganic Constituents, and organic compounds. A statistical comparison between data collected in 1989 and data collected in 1990-92 along with a comparison of replicate pairs was used to evaluate changes in water quality between samples and to assess sampling and analysis precision for individual Constituents. The comparisons of radionuclide data showed no pattern of water quality change between samples as concentrations randomly increased or decreased. Tritium concentrations did show a consistent pattern with location in the aquifer. The largest tritium concentrations occurred in water from wells in the Big Wood and Little Wood River drainages and in the southern part of the study area where heavy irrigation occurs. The variability of radionuclide concentrations may be attributed to the change in the contract laboratory used for radiochemical analyses between 1989 and 1990. The replicate data for radionuclides showed better overallmore » reproducibility for data collected in 1990-92 than for 1989, as 70 of 76 replicate pairs were statistically equivalent for 1990-92 data whereas only 55 of 73 replicate pairs were equivalent for 1989 data. The comparisons of most of the Inorganic Constituent data showed no statistical change between samples. Exceptions include nitrite plus nitrate as nitrogen and orthophosphate as phosphorus data. Fifteen sample pairs for nitride plus nitrate and 18 sample pairs for orthophosphate were not statistically equivalent and concentrations randomly increased or decreased.« less
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radionuclides stable isotopes Inorganic Constituents and organic compounds in water from selected wells and springs from the southern boundary of the idaho national engineering laboratory to the hagerman area idaho 1993
Other Information: PBD: Oct 1994, 1994Co-Authors: Roy C Bartholomay, Daniel D Edwards, Linford J CampbellAbstract:The US Geological Survey and the Idaho Department of Water Resources, in response to a request from the US Department of Energy, sampled 19 sites as part of a long-term project to monitor water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for selected radionuclides, stable isotopes, Inorganic Constituents, and organic compounds. The samples were collected from seven irrigation wells, four domestic wells, two springs, one stock well, three dairy wells, one observation well, and one commercial well. Two quality assurance samples also were collected and analyzed. None of the radionuclide, Inorganic Constituent, or organic compound concentrations exceeded the established maximum contaminant levels for drinking water. Most of the radionuclide and Inorganic Constituent concentrations exceeded their respective reporting levels. All samples analyzed for surfactants and dissolved organic carbon had concentrations that equaled or exceeded their reporting levels. The ethylbenzene concentration in one water sample exceeded the reporting level.
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radionuclides Inorganic Constituents organic compounds and bacteria in water from selected wells and springs from the southern boundary of the idaho national engineering laboratory to the hagerman area idaho 1991
Open-File Report, 1992Co-Authors: Roy C Bartholomay, Daniel D Edwards, Linford J CampbellAbstract:The US Geological Survey and the Idaho Department of Water Resources, in response to a request from the US Department of Energy, sampled 18 sites as part of a long-term project to monitor water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for manmade pollutants and naturally occurring Constituents. The samples were collected from six irrigation wells, seven domestic wells, two springs, one stock well, one dairy well, and one observation well. Quality assurance samples also were collected and analyzed. The water samples were analyzed for selected radionuclides, Inorganic Constituents, organic compounds, and bacteria. None of the samples analyzed for radionuclides, Inorganic Constituents, or organic compounds exceeded the established maximum contaminant levels for drinking water. Most of the radionuclide and Inorganic Constituent concentrations exceeded their respective reporting levels. All the samples analyzed for dissolved organic carbon had concentrations that exceeded their reporting level. Concentrations of 1,1,1 -trichloroethane exceeded the reporting level in two water samples. Two samples and a quality assurance replicate contained reportable concentrations of 2, 4-D. One sample contained fecal coliform bacteria counts that exceeded established maximum contaminant levelsmore » for drinking water.« less
M. Kuwata - One of the best experts on this subject based on the ideXlab platform.
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Secondary aerosol formation promotes water uptake by organic-rich wildfire haze particles in equatorial Asia
Copernicus Publications, 2018Co-Authors: J. Chen, S. H. Budisulistiorini, T. Miyakawa, Y. Komazaki, M. KuwataAbstract:The diameter growth factor (GF) of 100 nm haze particles at 85 % relative humidity (RH) and their chemical characteristics were simultaneously monitored at Singapore in October 2015 during a pervasive wildfire haze episode that was caused by peatland burning in Indonesia. Non-refractory submicron particles (NR-PM1) were dominated by organics (OA; approximating 77.1 % in total mass), whereas sulfate was the most abundant Inorganic Constituent (11.7 % on average). A statistical analysis of the organic mass spectra showed that most organics (36.0 % of NR-PM1 mass) were highly oxygenated. Diurnal variations of GF, number fractions of more hygroscopic mode particles, mass fractions of sulfate, and mass fractions of oxygenated organics (OOA) synchronized well, peaking during the day. The mean hygroscopicity parameter (κ) of the haze particles was 0.189 ± 0.087, and the mean κ values of organics were 0.157 ± 0.108 (κorg, bulk organics) and 0.266 ± 0.184 (κOOA, OOA), demonstrating the important roles of both sulfate and highly oxygenated organics in the hygroscopic growth of organics-dominated wildfire haze particles. κorg correlated with the water-soluble organic fraction insignificantly, but it positively correlated with f44 (fraction of the ion fragment at m∕z 44 in total organics) (R = 0.70), implying the oxygenation degree of organics could be more critical for the water uptake of organic compounds. These results further suggest the importance of sulfate and secondary organic aerosol formation in promoting the hygroscopic growth of wildfire haze particles. Further detailed size-resolved as well as molecular-level chemical information about organics is necessary for the profound exploration of water uptake by wildfire haze particles in equatorial Asia
Roy C Bartholomay - One of the best experts on this subject based on the ideXlab platform.
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radiochemical and chemical Constituents in water from selected wells and springs from the southern boundary of the idaho national engineering and environmental laboratory to the hagerman area idaho 1998
Other Information: PBD: 1 Dec 1998, 1999Co-Authors: Roy C Bartholomay, L M Williams, Linford J CampbellAbstract:The US Geological Survey and the Idaho Department of Water Resources, in cooperation with the US Department of Energy, sampled 19 sites as part of the fourth round of a long-term project to monitor water quality of the Snake river Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for selected radiochemical and chemical Constituents. The samples were collected from nine irrigation wells, three domestic wells, two dairy wells, two springs, one commercial well, one stock well, and one observation well. Two quality-assurance samples also were collected and analyzed. Additional sampling at six sites was done to complete the third round of sampling. None of the radiochemical or chemical Constituents exceeded the established maximum contaminant levels for drinking water. Many of the radionuclide- and Inorganic-Constituent concentrations were greater than their respective reporting levels.
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evaluation of radionuclide Inorganic Constituent and organic compound data from selected wells and springs from the southern boundary of the idaho national engineering laboratory to the hagerman area idaho 1989 1992
Other Information: PBD: Jan 1997, 1997Co-Authors: Roy C Bartholomay, L M Williams, Linford J CampbellAbstract:The U.S. Geological Survey and the Idaho Department of Water Resources, in cooperation with the U.S. Department of Energy, evaluated the water quality data collected from 55 wells and springs during 1989 and 1990 through 1992 from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area, Idaho. Water samples collected in 1989-92 were analyzed for selected radionuclides, Inorganic Constituents, and organic compounds. A statistical comparison between data collected in 1989 and data collected in 1990-92 along with a comparison of replicate pairs was used to evaluate changes in water quality between samples and to assess sampling and analysis precision for individual Constituents. The comparisons of radionuclide data showed no pattern of water quality change between samples as concentrations randomly increased or decreased. Tritium concentrations did show a consistent pattern with location in the aquifer. The largest tritium concentrations occurred in water from wells in the Big Wood and Little Wood River drainages and in the southern part of the study area where heavy irrigation occurs. The variability of radionuclide concentrations may be attributed to the change in the contract laboratory used for radiochemical analyses between 1989 and 1990. The replicate data for radionuclides showed better overallmore » reproducibility for data collected in 1990-92 than for 1989, as 70 of 76 replicate pairs were statistically equivalent for 1990-92 data whereas only 55 of 73 replicate pairs were equivalent for 1989 data. The comparisons of most of the Inorganic Constituent data showed no statistical change between samples. Exceptions include nitrite plus nitrate as nitrogen and orthophosphate as phosphorus data. Fifteen sample pairs for nitride plus nitrate and 18 sample pairs for orthophosphate were not statistically equivalent and concentrations randomly increased or decreased.« less
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radionuclides stable isotopes Inorganic Constituents and organic compounds in water from selected wells and springs from the southern boundary of the idaho national engineering laboratory to the hagerman area idaho 1993
Other Information: PBD: Oct 1994, 1994Co-Authors: Roy C Bartholomay, Daniel D Edwards, Linford J CampbellAbstract:The US Geological Survey and the Idaho Department of Water Resources, in response to a request from the US Department of Energy, sampled 19 sites as part of a long-term project to monitor water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for selected radionuclides, stable isotopes, Inorganic Constituents, and organic compounds. The samples were collected from seven irrigation wells, four domestic wells, two springs, one stock well, three dairy wells, one observation well, and one commercial well. Two quality assurance samples also were collected and analyzed. None of the radionuclide, Inorganic Constituent, or organic compound concentrations exceeded the established maximum contaminant levels for drinking water. Most of the radionuclide and Inorganic Constituent concentrations exceeded their respective reporting levels. All samples analyzed for surfactants and dissolved organic carbon had concentrations that equaled or exceeded their reporting levels. The ethylbenzene concentration in one water sample exceeded the reporting level.
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radionuclides Inorganic Constituents organic compounds and bacteria in water from selected wells and springs from the southern boundary of the idaho national engineering laboratory to the hagerman area idaho 1991
Open-File Report, 1992Co-Authors: Roy C Bartholomay, Daniel D Edwards, Linford J CampbellAbstract:The US Geological Survey and the Idaho Department of Water Resources, in response to a request from the US Department of Energy, sampled 18 sites as part of a long-term project to monitor water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for manmade pollutants and naturally occurring Constituents. The samples were collected from six irrigation wells, seven domestic wells, two springs, one stock well, one dairy well, and one observation well. Quality assurance samples also were collected and analyzed. The water samples were analyzed for selected radionuclides, Inorganic Constituents, organic compounds, and bacteria. None of the samples analyzed for radionuclides, Inorganic Constituents, or organic compounds exceeded the established maximum contaminant levels for drinking water. Most of the radionuclide and Inorganic Constituent concentrations exceeded their respective reporting levels. All the samples analyzed for dissolved organic carbon had concentrations that exceeded their reporting level. Concentrations of 1,1,1 -trichloroethane exceeded the reporting level in two water samples. Two samples and a quality assurance replicate contained reportable concentrations of 2, 4-D. One sample contained fecal coliform bacteria counts that exceeded established maximum contaminant levelsmore » for drinking water.« less
Feng Chen - One of the best experts on this subject based on the ideXlab platform.
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hydrothermal synthesis of hydroxyapatite nanorods and nanowires using riboflavin 5 phosphate monosodium salt as a new phosphorus source and their application in protein adsorption
CrystEngComm, 2013Co-Authors: Xinyu Zhao, Feng Chen, Yingjie Zhu, Jing ZhaoAbstract:Hydroxyapatite (HA), as the main Inorganic Constituent in vertebrate hard tissues, is an important biomaterial for the application in drug delivery and protein adsorption. Herein, we report a simple and green hydrothermal synthesis of HA nanorods and nanowires by using the biocompatible biomolecule riboflavin-5′-phosphate monosodium salt (RP) as a new phosphorus source. In this method, the RP molecules hydrolyze to form Inorganic phosphate ions under hydrothermal conditions, and these phosphate ions react with calcium ions to form HA nanorods or nanowires after nucleation and crystal growth. The effects of experimental conditions including hydrothermal temperature, heating time and pH value of the initial solution on the hydrolysis process of RP molecules are investigated. A possible formation mechanism of HA nanorods and nanowires is proposed. The as-prepared HA nanorods and nanowires are explored for the potential application in protein adsorption. The hemoglobin (Hb) loading capacities of HA nanowires and HA nanorods increase with increasing initial Hb concentration. The Hb loading capacities of HA nanowires and HA nanorods are determined to be as high as 289 mg g−1 and 298 mg g−1, respectively, at an initial Hb concentration of 2000 mg mL−1. The pH-dependent Hb release property of Hb-loaded HA nanowires and HA nanorods has been found. The experimental results indicate that the products are promising for applications in protein adsorption.
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microwave assisted hydrothermal rapid synthesis of hydroxyapatite nanowires using adenosine 5 triphosphate disodium salt as phosphorus source
Materials Letters, 2012Co-Authors: Chao Qi, Qili Tang, Xinyu Zhao, Feng ChenAbstract:Abstract Hydroxyapatite (HAP) is the most important Inorganic Constituent of biological hard tissues such as bone and tooth. However, the simple and controllable fabrication of HAP one-dimensional nanostructures remains a challenge. Herein, we report a microwave-assisted hydrothermal method for the rapid preparation of HAP nanowires using CaCl 2 ·2H 2 O and adenosine 5'-triphosphate disodium salt hydrate (Na 2 ATP) in aqueous solution without any surfactant. The effects of the reaction temperature and time on the morphology of the product are investigated. This method does not need any hard template or surfactant, avoiding the procedures and cost for their removal in the product. The as-prepared products are characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
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surfactant free solvothermal synthesis of hydroxyapatite nanowire nanotube ordered arrays with biomimetic structures
CrystEngComm, 2011Co-Authors: Feng Chen, Yingjie Zhu, Kewei Wang, Kuaile ZhaoAbstract:Hydroxyapatite (HAp), as the main Inorganic Constituent in vertebrate bones, is an important biomaterial. However, fabricating biomimetic HAp ordered arrays of one-dimensional nanostructures remains a challenge. Herein, we report a solvothermal method for the preparation of HAp nanowire/nanotube ordered arrays with biomimetic structures using CaCl2 and NaH2PO4·H2O in ternary solvents of water, ethylene glycol (EG) and N,N-dimethylformamide (DMF) without using any surfactant. The effects of the solvents on the morphology and crystal phase of the product as well as the formation mechanism of HAp nanowire/nanotube ordered arrays are investigated. This method does not need any hard template or surfactant, avoiding the procedures and cost for their removal in the product. The products are characterized with X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential scanning calorimetric analysis (DSC) and thermogravimetric analysis (TG). The cytotoxicity of the as-prepared HAp samples with different morphologies are also tested.
William L. Murphy - One of the best experts on this subject based on the ideXlab platform.
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Controlled nucleation of hydroxyapatite on alginate scaffolds for stem cell-based bone tissue engineering
Journal of Biomedical Materials Research - Part A, 2010Co-Authors: Darilis Su??rez-gonz??lez, Kara Barnhart, Eiji Saito, Scott J. Hollister, Ray Vanderby, William L. MurphyAbstract:Current bone tissue engineering strategies aim to grow a tissue similar to native bone by combining cells and biologically active molecules with a scaffold material. In this study, a macroporous scaffold made from the seaweed-derived polymer alginate was synthesized and mineralized for cell-based bone tissue engineering applications. Nucleation of a bone-like hydroxyapatite mineral was achieved by incubating the scaffold in modified simulated body fluids (mSBF) for 4 weeks. Analysis using scanning electron microscopy and energy dispersive x-ray analysis indicated growth of a continuous layer of mineral primarily composed of calcium and phosphorous. X-ray diffraction analysis showed peaks associated with hydroxyapatite, the major Inorganic Constituent of human bone tissue. In addition to the mineral characterization, the ability to control nucleation on the surface, into the bulk of the material, or on the inner pore surfaces of scaffolds was demonstrated. Finally, human MSCs attached and proliferated on the mineralized scaffolds and cell attachment improved when seeding cells on mineral coated alginate scaffolds. This novel alginate- HAP composite material could be used in bone tissue engineering as a scaffold material to deliver cells, and perhaps also biologically active molecules.