scholarly journals Electrochemical [11C]CO2to [11C]CO conversion for PET imaging

2017 ◽  
Vol 53 (20) ◽  
pp. 2982-2985 ◽  
Author(s):  
David A. Anders ◽  
Salvatore Bongarzone ◽  
Robin Fortt ◽  
Antony D. Gee ◽  
Nicholas J. Long
Keyword(s):  
Pet Imaging ◽  
Room Temperature ◽  
Co Conversion ◽  
Temperature And Pressure ◽  
Cyclam Complexes

Development of a novel electrochemical radiochemistry methodologyi.e.reduction of [11C]CO2to [11C]CO at room temperature and pressure using metal cyclam complexes.

ESEM - A multipurpose surface Electron Microscope

1986 ◽  
Vol 44 ◽  
pp. 632-633 ◽  
Author(s):  
G.D. Danilatos
Keyword(s):  
Electron Microscope ◽  
Room Temperature ◽  
Environmental Scanning ◽  
Gas Composition ◽  
Saturated Water Vapor ◽  
Surface Electron ◽  
Current State ◽  
Saturated Water ◽  
New Type ◽  
Temperature And Pressure

Over recent years a new type of electron microscope - the environmental scanning electron microscope (ESEM) - has been developed for the examination of specimen surfaces in the presence of gases. A detailed series of reports on the system has appeared elsewhere. A review summary of the current state and potential of the system is presented here.The gas composition, temperature and pressure can be varied in the specimen chamber of the ESEM. With air, the pressure can be up to one atmosphere (about 1000 mbar). Environments with fully saturated water vapor only at room temperature (20-30 mbar) can be easily maintained whilst liquid water or other solutions, together with uncoated specimens, can be imaged routinely during various applications.

scholarly journals Temperature and Pressure Variation of the Cl-NQR in A2PbCl6-Crystals

1986 ◽  
Vol 41 (1-2) ◽  
pp. 311-314 ◽  
Author(s):  
Y. M. Seo ◽  
J. Pelzl ◽  
C. Dimitropoulos
Keyword(s):  
Relaxation Rate ◽  
Room Temperature ◽  
Lattice Relaxation ◽  
Pressure Variation ◽  
Mixed Crystals ◽  
Spin Lattice Relaxation ◽  
Structural Transitions ◽  
Spin Lattice Relaxation Rate ◽  
Spin Lattice ◽  
Temperature And Pressure

The 35Cl NQR frequency and spin-lattice relaxation rate in the compounds A2PbCl6 (A = Cs, Rb, NH4, K) have been investigated in the range 4.2 K to 500 K, and as a function of pressure at room temperature. NQR experiments conducted on (K: NH4)2PbCl6 mixed crystals have been used to complete the NQR-frequency versus temperature diagram of K2PbCl6, revealing two structural transitions at Tc1 ≅ 358 K and at TC2 ≅ 333 K.

Synthesis and Characterization of CoFe2O4 Nanoparticles by Glycothermal Process

2007 ◽  
Vol 544-545 ◽  
pp. 865-868 ◽  
Author(s):  
Chil Soon Lee ◽  
Dong Sik Bae
Keyword(s):  
Room Temperature ◽  
Cofe2o4 Nanoparticles ◽  
Synthesis Parameters ◽  
Metal Nitrates ◽  
Temperature And Pressure ◽  
Starting Solutions ◽  
Average Size ◽  
Glycol Solution ◽  
Mild Temperature

CoFe2O4 nanoparticles were prepared in ethylene glycol solution under mild temperature and pressure conditions by precipitation from metal nitrates. The average size of the synthesized CoFe2O4 nanoparticles was in the range of 5 to 10, and they were narrowly distributed in the crystalline phase. Their magnetic property was of superparamagnetic character at room temperature. The effect of synthesis parameters is discussed such as the pH of starting solutions and reaction temperature.

Supervision and Significance on the Core Parameters for Steam and Water System in Supercritical Utility Thermal Power Plant

2012 ◽  
Vol 610-613 ◽  
pp. 2455-2458 ◽  
Author(s):  
Guo Hua Lu ◽  
Hai Wei Lu ◽  
Wei Su ◽  
Lei Jing Wang ◽  
Zhi Ping Zhu
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Room Temperature ◽  
Iron Transport ◽  
Thermal Power ◽  
Water System ◽  
Mathematical Relationship ◽  
Economic Operation ◽  
Temperature And Pressure ◽  
Oxide Solubility

Several core parameters in supercritical thermal power plant were briefly outlined, which had the significance in safe and economic operation. The influence and damage of Cl-, SO42- in steam and water system were discussed, and the mathematical relationship between the cation conductivity and the concentration of Cl-, SO42- was described in room temperature. Meanwhile, the iron transport and deposition in steam and water system was analyzed, according to iron oxide solubility at different temperature and pressure.

Graphene Oxide PMMA Solid on the Absorption of Lead Ion

2017 ◽  
Vol 896 ◽  
pp. 32-39
Author(s):  
Po Sang Lo ◽  
Chun Ki Yeung
Keyword(s):  
Graphene Oxide ◽  
Room Temperature ◽  
Dry Mass ◽  
Optical Microscope ◽  
Test Solution ◽  
Lead Ion ◽  
Contributing Factors ◽  
Standard Solution ◽  
Temperature And Pressure ◽  
Adsorption Capability

GO-PMMA solid was used to test its ability on absorbing the lead ion obtained from standard solution. Samples of the test solution were collected at 0 min, 10 min, 30 min, 50 min and 70 min. The results analyzed from ICP reveal that GO-PMMA solid could absorb lead (II) ion sup to 68.6%, which is 65.8% higher than the control setup, i.e. PMMA solid, at room temperature and pressure. The dry mass of GO-PMMA solid is around 119.82g and the mass after testing is around 124.21g. The ability of absorption could be easily refreshed by washing with ethanol and distillated water (80/20 v/v) several times. Structure of GO-PMMA solid was characterized by FRIR and optical microscope. The oxygen-containing functional groups and the rough surface of the GO-PMMA solid are determined to be the contributing factors of the adsorption of lead (II) ion onto GO-PMMA solid. The high removal efficiency of GO-PMMA suggests its adsorption capability on lead (II) ion and can be applied to remove lead (II) ions from water.

scholarly journals Facile room temperature synthesis of large graphene sheets from simple molecules

2018 ◽  
Vol 9 (37) ◽  
pp. 7297-7303 ◽  
Author(s):  
Laís C. Lopes ◽  
Lidya C. da Silva ◽  
Boniek G. Vaz ◽  
Alfredo R. M. Oliveira ◽  
Marcela M. Oliveira ◽  
...  
Keyword(s):  
Room Temperature ◽  
Graphene Sheets ◽  
Ambient Conditions ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis ◽  
Temperature And Pressure ◽  
Simple Molecules

The simplest way to produce large graphene sheets starting from simple molecules (benzene or n-hexane) under ambient conditions (temperature and pressure).

Role of surfactants on metal mediated cerium(IV) oxidation of valeraldehyde at room temperature and pressure

2015 ◽  
Vol 211 ◽  
pp. 48-62 ◽  
Author(s):  
Aniruddha Ghosh ◽  
Pintu Sar ◽  
Susanta Malik ◽  
Bidyut Saha
Keyword(s):  
Room Temperature ◽  
Temperature And Pressure

Organic Solvent Fumigation Bonding for Multi-Layer Poly(methyl Methacrylate) Microfluidic Device

2014 ◽  
Vol 609-610 ◽  
pp. 654-659 ◽  
Author(s):  
He Zhang ◽  
Xiao Wei Liu ◽  
Li Tian ◽  
Xiao Wei Han ◽  
Yao Liu
Keyword(s):  
Low Temperature ◽  
Organic Solvent ◽  
Methyl Methacrylate ◽  
Room Temperature ◽  
Microfluidic Devices ◽  
Saturated Steam ◽  
Silicone Adhesive ◽  
Cover Sheet ◽  
Temperature And Pressure ◽  
Bonding Method

In this paper, a novel bonding method for microfluidic devices was presented. The organic solvent fumigation bonding method can be used to produce multi-layer PMMA microfluidic devices under the condition of room temperature and low pressure. During the bonding, we choose chloroform as bonding solvents, the polyimide tape was used to protect no-need-bonding side of the cover sheet and the sealant silicone adhesive was used to protect the microstructure in the bonding side. The substrate was fumigated for 5minutes in the saturated steam conditions, then remove the polyimide tape as well as the sealant silicone adhesive. Assemble the fumigation cover sheet to the substrate with microchannel by using fixtures, soon after put the fixture and the substrates into the oven, dried at 50 °C for 10 minutes. Finally, remove the fixture, the bonding complete. Because of the bonding was accomplished under conditions of low temperature and pressure, the deformation of microchannel is very small. When the method was used for multilayer chip bonding, it also achieved good results.

Catalytic Properties of Cryogelated Noble Metal Aerogels

2017 ◽  
Vol 231 (1) ◽  
Author(s):  
Axel Freytag ◽  
Massimo Colombo ◽  
Nadja C. Bigall
Keyword(s):  
Noble Metal ◽  
Room Temperature ◽  
Catalyst Surface ◽  
Catalytic Properties ◽  
State Of The Art ◽  
Catalytic Performance ◽  
Model Reaction ◽  
Catalytic Reactions ◽  
Co Conversion ◽  
Oxidation Of Carbon Monoxide

AbstractThe catalytic properties of cryogelated noble metal aerogel monoliths out of aqueous colloids are investigated using the oxidation of carbon monoxide (CO) as a model reaction, in order to evaluate their potential for catalytic applications. Aerogels built of self-supporting platinum (Pt) and palladium (Pd) nanocrystals (NCs) have a directly accessible catalyst surface and show catalytic performance similar to state of the art catalysts while being support-free and therefore ultralight materials. In addition, these materials provide properties like room temperature CO conversion and spontaneous catalytic reactions. However, full material aerogel catalysts come with the side effect of limited thermal stability, which will have to be overcome in future.

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