Fission fragment radiolysis of carbon dioxide

1981 ◽  
Vol 59 (3) ◽  
pp. 532-536 ◽  
Author(s):  
Yasumasa Ikezoe ◽  
Shoichi Sato ◽  
Saburo Shimizu
Keyword(s):  
Carbon Dioxide ◽  
Fission Fragment ◽  
Radical Reaction ◽  
Reaction System ◽  
Back Reaction ◽  
Chain Reaction ◽  
Upper Limit ◽  
Analysis Of Results ◽  
Co Concentrations ◽  
Oxidation Of Carbon Monoxide

The fission fragment radiolysis of CO2 and the CO2–C3H8, CO2–NO2 systems is studied in comparison with the γ radiolysis. Two kinds of back reactions (re-oxidation of carbon monoxide to carbon dioxide) are operative in the fission fragment radiolysis. One (a rapid back reaction) is the unidentified ionic chain reaction which proceeds at low CO concentrations, and the other (a slow back reaction) is assigned to a radical reaction (CO + O + CO2 → 2CO2 [3′]). This slow back reaction is a characteristic of the fission fragment radiolysis. The analysis of results gives an upper limit of the radius of fission fragment tracks in the reaction system, rρ < 1.04 μg cm−2.

scholarly journals A Self-Contained Portable Polymerase-Chain-Reaction System Integrated with Electromagnetic Mini-Actuators for Bi-Directional Fluid Transport

2011 ◽  
Vol 27 (3) ◽  
pp. 357-364
Author(s):  
B. T. Chia ◽  
S.-A. Yang ◽  
M.-Y. Cheng ◽  
C.-W. Lin ◽  
Y.-J. Yang
Keyword(s):  
Polymerase Chain Reaction ◽  
Fluid Transport ◽  
Point Of Care ◽  
Reaction System ◽  
Thermal Characteristics ◽  
Pcr Amplification ◽  
Chain Reaction ◽  
Rapid Temperature ◽  
Small Footprint ◽  
Polymerase Chain

ABSTRACTIn this paper, the development of a portable polymerase chain reaction (PCR) device is presented. Integrating electromagnetic mini-actuators for bi-directional fluid transport, the proposed device, whose dimension is 67mm × 66mm × 25mm, can be fully operated with a 5V DC voltage. The device consists of four major parts: A disposable channel chip in which PCR mixture is manipulated and reacted, a heater chip which generates different temperature zones for PCR reaction, a linear actuator array for pumping PCR mixture, and a circuit module for controlling and driving the system. The advantages of the device include the rapid temperature responses associated with continuous-flow-type PCR devices, as well as the programmable thermal cycling associated with chamber-type PCR devices. The thermal characteristics are measured and discussed. PCR amplification is successfully performed for the 122 bp segment of MCF-7/adr cell line. Due to its small footprint, this self-contained system potentially can be employed for point-of-care (POC) applications.

Na-K-ATPase isoform (alpha 3, alpha 2, alpha 1) abundance in rat kidney estimated by competitive RT-PCR and ouabain binding

1996 ◽  
Vol 271 (2) ◽  
pp. F253-F260 ◽  
Author(s):  
K. Lucking ◽  
J. M. Nielsen ◽  
P. A. Pedersen ◽  
P. L. Jorgensen
Keyword(s):  
Polymerase Chain Reaction ◽  
Rat Kidney ◽  
Sodium Reabsorption ◽  
Rt Pcr ◽  
Ouabain Binding ◽  
Chain Reaction ◽  
Competitive Polymerase Chain Reaction ◽  
High Affinity ◽  
Upper Limit ◽  
Polymerase Chain

For understanding the regulation of sodium reabsorption, it is important to know whether the alpha 2- or alpha 3-isoform of Na-K-adenosinetriphosphatase (Na-K-ATPase) is expressed in mammalian kidney in addition to the predominant alpha 1 beta 1-isozyme. Here we applied competitive polymerase chain reaction (PCR) for estimation of mRNA in parenchymal zones of rat kidney for comparison to high-affinity [3H]ouabain binding. The alpha 3-isoform mRNA was demonstrated to form 0.04-0.05% of the amount of alpha 1-isoform mRNA in the cortex, medulla, and papilla of rat kidney. The alpha 2-mRNA was demonstrated in all three zones and constituted 0.03% of the amount of alpha 1-mRNA in cortex. The abundance of the alpha 1 truncated mRNA was 0.1-0.8% of that of the alpha 1-mRNA. The upper limit for expression of Na-K-ATPase isozyme with high ouabain affinity (dissociation constant, 69-141 nM) was 0.096-0.14% of the concentration of alpha 1 beta 1-Na-K-ATPase. Thus a small but well-defined pool of alpha 2- and alpha 3-isoforms constitutes < or = 0.1% of the amount of alpha 1-isoform at both the mRNA and protein level in rat kidney.

Ultrasensitive version of nucleic acid sequence-based amplification (NASBA) utilizing nicking and extension chain reaction system

Nanoscale ◽  
2021 ◽  
Author(s):  
Yong Ju ◽  
Hyo Yong Kim ◽  
Jun Ki Ahn ◽  
Hyun Gyu Park
Keyword(s):  
Nucleic Acid ◽  
Reaction System ◽  
Isothermal Amplification ◽  
Nucleic Acid Sequence ◽  
Chain Reaction ◽  
Rna Targets ◽  
System P ◽  
Amplification Technique ◽  
Extension Chain

Nucleic acid sequence-based amplification (NASBA) is a transcription-based isothermal amplification technique especially designed for the detection of RNA targets. The NASBA basically relies on the linear production of T7 RNA...

Influence of Compressed Carbon Dioxide on the Oxidation of Cyclohexane with Hydrogen Peroxide in Acetic Acid

2006 ◽  
Vol 59 (3) ◽  
pp. 225 ◽  
Author(s):  
Liang Gao ◽  
Tao Jiang ◽  
Buxing Han ◽  
Baoning Zong ◽  
Xiaoxin Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Binary System ◽  
Reaction System ◽  
Phase Region ◽  
Phase Behaviour ◽  
Phase System ◽  
Two Phase ◽  
Three Phase

The oxidation of cyclohexane with H2O2 in a compressed CO2/acetic acid binary system was studied at 60.0 and 80.0°C, at pressures up to 18 MPa, and with the zeolite TS-1 as catalyst. The phase behaviour of the reaction system was also observed. There are three fluid phases in the reaction system at lower pressure but two at higher pressures. In the three-phase region the yields of the products, cyclohexanol and cyclohexanone, increase considerably with increasing pressure and reaches a maximum near the phase-separating pressure. CO2 can thus enhance the reaction effectively. However, the effect of pressure on the yield is very limited after the transition to a two-phase system.

A visible-light-irradiated electron donor-acceptor complex-promoted radical reaction system for the C H perfluoroalkylation of quinolin-4-ols

2019 ◽  
Vol 60 (38) ◽  
pp. 151046 ◽  
Author(s):  
Yunze Li ◽  
Min Rao ◽  
Zhenwei Fan ◽  
Baoyi Nian ◽  
Yaofeng Yuan ◽  
...  
Keyword(s):  
Visible Light ◽  
Electron Donor ◽  
Radical Reaction ◽  
Reaction System ◽  
Acceptor Complex ◽  
Donor Acceptor
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