Atmospheric Oxidation of Toluene in a Large-Volume Outdoor Photoreactor:  In Situ Determination of Ring-Retaining Product Yields

1998 ◽  
Vol 102 (50) ◽  
pp. 10289-10299 ◽  
Author(s):  
Björn Klotz ◽  
Søren Sørensen ◽  
Ian Barnes ◽  
Karl H. Becker ◽  
Thomas Etzkorn ◽  
...  
Keyword(s):  
Large Volume ◽  
Atmospheric Oxidation ◽  
Product Yields

Determination of low-level radiostrontium, with emphasis on in situ pre-concentration of Sr from large volume of freshwater sample using Powdex resin

2015 ◽  
Vol 146 ◽  
pp. 88-93 ◽  
Author(s):  
Jumpei Tomita ◽  
Masayoshi Yamamoto ◽  
Teo Nozaki ◽  
Yoshihiko Tanimura ◽  
Tetsuya Oishi
Keyword(s):  
Large Volume ◽  
Low Level ◽  
Freshwater Sample

Re-evaluation assessment of a large volume sampling (LVS) system for the determination of petroleum hydrocarbons and their stable carbon isotopes in deep-sea waters

2019 ◽  
Vol 11 (31) ◽  
pp. 3943-3957
Author(s):  
Imma Tolosa ◽  
Carlos Guitart ◽  
Marianela Mesa-Albernas ◽  
Carolina Funkey ◽  
Roberto Cassi
Keyword(s):  
Carbon Isotopes ◽  
Large Volume ◽  
Deep Sea ◽  
Petroleum Hydrocarbons ◽  
Isotope Ratio ◽  
Stable Carbon Isotopes ◽  
Sampling Technique ◽  
Stable Carbon

A large volume sampling technique is used to develop and validate a home-made SPE system connected to a particle collector in situ pump for high sample pre-concentration and determination of petroleum hydrocarbons and their 13C/12C isotope ratio.

scholarly journals The Bridgmanite–Akimotoite–Majorite Triple Point Determined in Large Volume Press and Laser-Heated Diamond Anvil Cell

Minerals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 67
Author(s):  
Britany L. Kulka ◽  
Jonathan D. Dolinschi ◽  
Kurt D. Leinenweber ◽  
Vitali B. Prakapenka ◽  
Sang-Heon Shim
Keyword(s):  
High Pressure ◽  
Triple Point ◽  
Large Volume ◽  
Diamond Anvil Cell ◽  
Experimental Methods ◽  
Diamond Anvil ◽  
Laser Heated ◽  
Good Agreement

The bridgmanite–akimotoite–majorite (Bm–Ak–Mj or BAM) triple point in MgSiO3 has been measured in large-volume press (LVP; COMPRES 8/3 assembly) and laser-heated diamond anvil cell (LHDAC). For the LVP data, we calculated pressures from the calibration provided for the assembly. For the LHDAC data, we conducted in situ determination of pressure at high temperature using the Pt scale at synchrotron. The measured temperatures of the triple point are in good agreement between LVP and LHDAC at 1990–2000 K. However, the pressure for the triple point determined from the LVP is 3.9 ± 0.6 GPa lower than that from the LHDAC dataset. The BAM triple point determined through these experiments will provide an important reference point in the pressure–temperature space for future high-pressure experiments and will allow mineral physicists to compare the pressure–temperature conditions measured in these two different experimental methods.

scholarly journals The Akimotoite--Majorite--Bridgmanite Triple Point Determined in Large Volume Press and Laser-Heated Diamond Anvil Cell

2019 ◽  
Author(s):  
Britany Kulka ◽  
Jonathan Dolinschi ◽  
Kurt Leinenweber ◽  
Vitali Prakapenka ◽  
Sang-Heon Shim
Keyword(s):  
High Pressure ◽  
Triple Point ◽  
Large Volume ◽  
Diamond Anvil Cell ◽  
Experimental Methods ◽  
Diamond Anvil ◽  
Laser Heated ◽  
Good Agreement

The akimotoite--majorite--bridgmanite (Ak--Mj--Bm) triple point in MgSiO3 has been measured in large-volume press (LVP; COMPRES 8/3 assembly) and laser-heated diamond anvil cell (LHDAC). For the LVP data, we calculated pressures from the calibration by Leinenweber (2012). For the LHDAC data, we conducted \textit{in situ} determination of pressure at high temperature using the Pt scale by Dorogokupets and Dewaele (2007) at synchrotron. The measured temperatures of the triple point are in good agreement between LVP and LHDAC at 1990-2000 K. However, the pressure for the triple point determined from the LVP is 3.9+/-0.6~GPa lower than that from the LHDAC dataset. The triple point determined through these experiments will provide an important reference point in the pressure-temperature space for future high-pressure experiments and allow mineral physicists to compare the pressure--temperature conditions measured in these two different experimental methods.

In-situ ultrasonic calibrations of pressure and temperature in a hinge-type double-stage cubic large volume press

2022 ◽  
Author(s):  
Qingze Li ◽  
Xiping Chen ◽  
Lei Xie ◽  
Tiexin Han ◽  
Jiacheng Sun ◽  
...  
Keyword(s):  
Travel Time ◽  
Large Volume ◽  
High Pressures ◽  
Physical Property ◽  
Calibration Method ◽  
Precise Determination ◽  
Thermal Cell ◽  
Acoustic Travel Time

Abstract Here, simultaneous in-situ calibration of pressures and temperatures was performed in a hinge-type second-stage cubic large volume press (LVP) up to 15 GPa and 1400 K by an acoustic travel-time approach. Based on the recently reported P-t S and P-T-t P -t S equations for Al2O3 buffer rod, the cell pressures and temperatures in the chamber of LVP were in-situ determined, in comparison with those by conventional off-line (or fixed-points) pressure calibration method and direct thermocouple measurement, respectively. It is found that the cell pressures of the LVP chamber are significantly reduced after annealing at simultaneous high pressures and high temperatures, owing to the stress relaxation as accumulate in the LVP chamber. This acoustic travel-time method is validated to be a good way for precise determination of thermal (cell) pressures at high temperature conditions, and is of great importance and necessity to conduct in-situ physical property measurements under extreme high P-T conditions, especially when the precious synchrotron X-ray/neutron diffraction beams are not available.

Determination of plutonium isotopes in marine particles collected by the large volume in situ filtration and concentration system

2007 ◽  
Vol 275 (2) ◽  
pp. 291-297 ◽  
Author(s):  
A. Okubo ◽  
J. Zheng ◽  
M. Yamada ◽  
T. Aono ◽  
T. Nakanishi ◽  
...  
Keyword(s):  
Large Volume ◽  
Plutonium Isotopes ◽  
Marine Particles

INDIREKTE PAPIERCHROMATOGRAPHISCHE METHODE ZUR BESTIMMUNG DER HARNOESTROGENE

1961 ◽  
Vol 38 (4) ◽  
pp. 545-562 ◽  
Author(s):  
L. Kecskés ◽  
F. Mutschler ◽  
I. Glós ◽  
E. Thán ◽  
I. Farkas ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Granulosa Cell ◽  
Iron Content ◽  
List Type ◽  
Granulosa Cell Tumour ◽  
Hydrolysis Of ◽  
Phenol Fraction ◽  
Qualitative Determination

ABSTRACT 1. An indirect paperchromatographic method is described for separating urinary oestrogens; this consists of the following steps: acidic hydrolysis, extraction with ether, dissociation of phenol-fractions with partition between the solvents. Previous purification of phenol fraction with the aid of paperchromatography. The elution of oestrogen containing fractions is followed by acetylation. Oestrogen acetate is isolated by re-chromatography. The chromatogram was developed after hydrolysis of the oestrogens 'in situ' on the paper. The quantity of oestrogens was determined indirectly, by means of an iron-reaction, after the elution of the iron content of the oestrogen spot, which was developed by the Jellinek-reaction. 2. The method described above is satisfactory for determining urinary oestrogen, 17β-oestradiol and oestriol, but could include 16-epioestriol and other oestrogenic metabolites. 3. The sensitivity of the method is 1.3–1.6 μg/24 hours. 4. The quantitative and qualitative determination of urinary oestrogens with the above mentioned method was performed in 50 pregnant and 9 non pregnant women, and also in 2 patients with granulosa cell tumour.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

Sign in / Sign up

Export Citation Format

Share Document